Add pre-commit configuration file to gitignore

* Move disp_spi.c and tp_spi.c to lv_port

* Move esp_lcd_backlight to lv_port

* Move disp_spi.h and tp_spi.h to lv_port

.github/workflows/build_examples.yml

@@ -0,0 +1,29 @@
+name: 'build'
+
+on: [push, pull_request]
+
+jobs:
+  build:
+    strategy:
+      matrix:
+        idf_ver: ["v4.1", "v4.2", "v4.3"]
+        idf_target: ["esp32"]
+        include:
+          - idf_ver: "v4.2"
+            idf_target: esp32s2
+          - idf_ver: "v4.3"
+            idf_target: esp32c3
+    runs-on: ubuntu-20.04
+    container: espressif/idf:release-${{ matrix.idf_ver }}
+    steps:
+      - uses: actions/checkout@v1
+        with:
+          submodules: recursive
+      - name: Build ESP examples
+        env:
+          IDF_TARGET: ${{ matrix.idf_target }}
+        shell: bash
+        run: |
+          cd examples/wemos_lolin_oled/hello_world
+          . ${IDF_PATH}/export.sh
+          idf.py build

.gitignore

@@ -60,3 +60,6 @@ build
 # Kconfig files
 sdkconfig
 sdkconfig.old
+
+# pre-commit configuration file
+.pre-commit-config.yaml

.gitmodules

@@ -0,0 +1,3 @@
+[submodule "examples/common_components/lvgl"]
+	path = examples/common_components/lvgl
+	url = https://github.com/lvgl/lvgl.git

CMakeLists.txt

@@ -3,55 +3,38 @@ if(ESP_PLATFORM)
 file(GLOB SOURCES *.c)
 set(LVGL_INCLUDE_DIRS . lvgl_tft)
 list(APPEND SOURCES "lvgl_tft/disp_driver.c")
-list(APPEND SOURCES "lvgl_tft/esp_lcd_backlight.c")
+list(APPEND SOURCES "lv_port/esp_lcd_backlight.c")
 
-# Include only the source file of the selected
-# display controller.
-if(CONFIG_LV_TFT_DISPLAY_CONTROLLER_ILI9341)
+# This are the source files used for mcu abstraction
+set(LV_PORT_PATH "lv_port")
+
+list(APPEND SOURCES "${LV_PORT_PATH}/lv_port_display_espressif.c")
+
+#@todo add SimleInclude macro here
+
+# Build all display drivers
     list(APPEND SOURCES "lvgl_tft/ili9341.c")
-elseif(CONFIG_LV_TFT_DISPLAY_CONTROLLER_ILI9481)
     list(APPEND SOURCES "lvgl_tft/ili9481.c")
-elseif(CONFIG_LV_TFT_DISPLAY_CONTROLLER_ILI9486)
     list(APPEND SOURCES "lvgl_tft/ili9486.c")
-elseif(CONFIG_LV_TFT_DISPLAY_CONTROLLER_ILI9488)
     list(APPEND SOURCES "lvgl_tft/ili9488.c")
-elseif(CONFIG_LV_TFT_DISPLAY_CONTROLLER_ST7789)
     list(APPEND SOURCES "lvgl_tft/st7789.c")
-elseif(CONFIG_LV_TFT_DISPLAY_CONTROLLER_ST7735S)
     list(APPEND SOURCES "lvgl_tft/st7735s.c")
-elseif(CONFIG_LV_TFT_DISPLAY_CONTROLLER_ST7796S)
     list(APPEND SOURCES "lvgl_tft/st7796s.c")
-elseif(CONFIG_LV_TFT_DISPLAY_CONTROLLER_HX8357)
     list(APPEND SOURCES "lvgl_tft/hx8357.c")
-elseif(CONFIG_LV_TFT_DISPLAY_CONTROLLER_SH1107)
     list(APPEND SOURCES "lvgl_tft/sh1107.c")
-elseif(CONFIG_LV_TFT_DISPLAY_CONTROLLER_SSD1306)
     list(APPEND SOURCES "lvgl_tft/ssd1306.c")
-elseif(CONFIG_LV_TFT_DISPLAY_CONTROLLER_FT81X)
     list(APPEND SOURCES "lvgl_tft/EVE_commands.c")
     list(APPEND SOURCES "lvgl_tft/FT81x.c")
-elseif(CONFIG_LV_TFT_DISPLAY_CONTROLLER_IL3820)
     list(APPEND SOURCES "lvgl_tft/il3820.c")
-elseif(CONFIG_LV_TFT_DISPLAY_CONTROLLER_JD79653A)
     list(APPEND SOURCES "lvgl_tft/jd79653a.c")
-elseif(CONFIG_LV_TFT_DISPLAY_CONTROLLER_UC8151D)
     list(APPEND SOURCES "lvgl_tft/uc8151d.c")
-elseif(CONFIG_LV_TFT_DISPLAY_CONTROLLER_RA8875)
     list(APPEND SOURCES "lvgl_tft/ra8875.c")
-elseif(CONFIG_LV_TFT_DISPLAY_CONTROLLER_GC9A01)
     list(APPEND SOURCES "lvgl_tft/GC9A01.c")
-elseif(CONFIG_LV_TFT_DISPLAY_CONTROLLER_ILI9163C)
     list(APPEND SOURCES "lvgl_tft/ili9163c.c")
-elseif(CONFIG_LV_TFT_DISPLAY_CONTROLLER_PCD8544)
     list(APPEND SOURCES "lvgl_tft/pcd8544.c")
-elseif(CONFIG_LV_TFT_DISPLAY_CONTROLLER_SCHMITT)
-    list(APPEND SOURCES "lvgl_tft/schmitt.c")
-else()
-    message(WARNING "LVGL ESP32 drivers: Display controller not defined.")
-endif()
 
 if(CONFIG_LV_TFT_DISPLAY_PROTOCOL_SPI)
-    list(APPEND SOURCES "lvgl_tft/disp_spi.c")
+    list(APPEND SOURCES "lv_port/disp_spi.c")
 endif()
 
 # Add touch driver to compilation only if it is selected in menuconfig
@@ -78,7 +61,7 @@ if(CONFIG_LV_TOUCH_CONTROLLER)
     endif()
 
     if(CONFIG_LV_TOUCH_DRIVER_PROTOCOL_SPI)
-        list(APPEND SOURCES "lvgl_touch/tp_spi.c")
+        list(APPEND SOURCES "lv_port/tp_spi.c")
     endif()
 endif()
 
@@ -86,9 +69,11 @@ if(CONFIG_LV_I2C)
     list(APPEND SOURCES "lvgl_i2c/i2c_manager.c")
 endif()
 
+list(APPEND LVGL_INCLUDE_DIRS lv_port)
+
 idf_component_register(SRCS ${SOURCES}
                        INCLUDE_DIRS ${LVGL_INCLUDE_DIRS}
-                       REQUIRES lvgl driver esp_common log freertos esp_rom soc)
+                       REQUIRES lvgl)
 
 target_compile_definitions(${COMPONENT_LIB} PUBLIC "-DLV_LVGL_H_INCLUDE_SIMPLE")
 

README.md

@@ -12,6 +12,11 @@ For a ready to use ESP32 project take look at the [lv_port_esp32](https://github
 **NOTE:** You need to set the display horizontal and vertical size, color depth and
 swap of RGB565 color on the LVGL configuration menuconfig (it's not handled automatically).
 
+## MCU Configuration
+
+Example of SPI/I2C configuration peripherals is done with `lvgl_interface_init`.
+Example of display gpios configuration, such as the DC, RST, Backlight is done with `lvgl_display_gpios_init`
+
 
 ## Supported display controllers
 

display_config.h

@@ -0,0 +1,43 @@
+#ifndef DISPLAY_CONFIG_H_
+#define DISPLAY_CONFIG_H_
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include "sdkconfig.h"
+
+/* Configuration options for ST7789 display controllers */
+#if defined CONFIG_LV_DISP_USE_RST
+  #if defined CONFIG_LV_DISP_ST7789_SOFT_RESET
+    #define ST7789_SOFT_RST
+  #endif
+#else
+  #define ST7789_SOFT_RST
+#endif
+
+#if defined (CONFIG_LV_INVERT_COLORS)
+#define ST7789_INVERT_COLORS    1U
+#define ILI9341_INVERT_COLORS   1U 
+#endif
+    
+#define ST7789_INITIAL_ORIENTATION  CONFIG_LV_DISPLAY_ORIENTATION
+
+#if CONFIG_LV_DISP_USE_RST
+#define ILI9341_USE_RST
+#endif
+
+#define ILI9341_INITIAL_ORIENTATION CONFIG_LV_DISPLAY_ORIENTATION
+
+/* ILI9488 Configuration */
+#if CONFIG_LV_DISP_USE_RST
+#define ILI9488_USE_RST
+#endif
+
+#define ILI9488_INITIAL_ORIENTATION CONFIG_LV_DISPLAY_ORIENTATION
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#endif /* DISPLAY_CONFIG_H_ */

examples/common_components/lvgl

@@ -0,0 +1 @@
+Subproject commit 2e942060f077de19667ec200afcfd2b32352064b

examples/wemos_lolin_oled/hello_world/CMakeLists.txt

@@ -0,0 +1,9 @@
+# For more information about build system see
+# https://docs.espressif.com/projects/esp-idf/en/latest/api-guides/build-system.html
+# The following five lines of boilerplate have to be in your project's
+# CMakeLists in this exact order for cmake to work correctly
+cmake_minimum_required(VERSION 3.5)
+
+set(EXTRA_COMPONENT_DIRS ../../common_components ../../..)
+include($ENV{IDF_PATH}/tools/cmake/project.cmake)
+project(hello_world)

examples/wemos_lolin_oled/hello_world/main/CMakeLists.txt

@@ -0,0 +1,2 @@
+idf_component_register(SRCS "hello_world.c"
+                    INCLUDE_DIRS ".")

examples/wemos_lolin_oled/hello_world/main/hello_world.c

@@ -0,0 +1,110 @@
+/* Hello world on Wemos Lolin32 board
+ *
+ * This example code is in the Public Domain (or CC0 licensed, at your option.)
+ *
+ * Unless required by applicable law or agreed to in writing, this
+ * software is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
+ * CONDITIONS OF ANY KIND, either express or implied.
+ */
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "freertos/FreeRTOS.h"
+#include "freertos/task.h"
+#include "esp_freertos_hooks.h"
+#include "freertos/semphr.h"
+#include "esp_system.h"
+#include "driver/gpio.h"
+
+/* Littlevgl specific */
+#ifdef LV_LVGL_H_INCLUDE_SIMPLE
+#include "lvgl.h"
+#else
+#include "lvgl/lvgl.h"
+#endif
+
+#include "lvgl_helpers.h"
+
+/*********************
+ *      DEFINES
+ *********************/
+#define LV_TICK_PERIOD_MS 1
+
+/**********************
+ *  STATIC PROTOTYPES
+ **********************/
+static void lvgl_tick_inc(void *arg);
+static void guiTask(void *pvParameter);
+
+/**********************
+ *   APPLICATION MAIN
+ **********************/
+void app_main()
+{
+    xTaskCreatePinnedToCore(guiTask, "gui", 4096*2, NULL, 0, NULL, 1);
+}
+
+static void guiTask(void *pvParameter)
+{
+    (void) pvParameter;
+    lv_init();
+    
+    /* Initialize the needed peripherals */
+    lvgl_interface_init();
+    /* Initialize needed GPIOs, e.g. backlight, reset GPIOs */
+    lvgl_display_gpios_init();
+
+    /* ToDo Initialize used display driver passing registered lv_disp_drv_t as parameter */
+
+    size_t display_buffer_size = lvgl_get_display_buffer_size();
+    lv_color_t* buf1 = heap_caps_malloc(display_buffer_size * sizeof(lv_color_t), MALLOC_CAP_DMA);
+    assert(buf1 != NULL);
+
+    static lv_disp_draw_buf_t disp_buf;
+    lv_disp_draw_buf_init(&disp_buf, buf1, NULL, display_buffer_size * 8);
+
+    lv_disp_drv_t disp_drv;
+    lv_disp_drv_init(&disp_drv);
+    disp_drv.flush_cb = disp_driver_flush;
+    disp_drv.rounder_cb = disp_driver_rounder;
+    disp_drv.set_px_cb = disp_driver_set_px;
+    disp_drv.draw_buf = &disp_buf;
+    /* LVGL v8: Set display horizontal and vertical resolution (in pixels), it's no longer done with lv_conf.h */
+    disp_drv.hor_res = 128u;
+    disp_drv.ver_res = 64u;
+    lv_disp_drv_register(&disp_drv);
+
+    /* Create and start a periodic timer interrupt to call lv_tick_inc */
+    const esp_timer_create_args_t periodic_timer_args = {
+        .callback = &lvgl_tick_inc,
+        .name = "lvgl_tick"
+    };
+    esp_timer_handle_t periodic_timer;
+    ESP_ERROR_CHECK(esp_timer_create(&periodic_timer_args, &periodic_timer));
+    ESP_ERROR_CHECK(esp_timer_start_periodic(periodic_timer, LV_TICK_PERIOD_MS * 1000));
+
+    /* Create a Hellow World label on the currently active screen */
+    lv_obj_t *scr = lv_disp_get_scr_act(NULL);
+
+    /* LVGL v8 lv_label_create no longer takes 2 parameters */
+    lv_obj_t *label1 =  lv_label_create(scr);
+    lv_label_set_text(label1, "Hello\nworld");
+
+    /* Align the Label to the center
+     * NULL means align on parent (which is the screen now)
+     * 0, 0 at the end means an x, y offset after alignment*/
+    lv_obj_align(label1, LV_ALIGN_CENTER, 0, 0);
+
+    while (1) {
+        vTaskDelay(pdMS_TO_TICKS(10));
+        lv_task_handler();
+    }
+    free(buf1);
+}
+
+static void lvgl_tick_inc(void *arg) {
+    (void) arg;
+    lv_tick_inc(LV_TICK_PERIOD_MS);
+}

examples/wemos_lolin_oled/hello_world/sdkconfig.defaults

@@ -0,0 +1,11 @@
+CONFIG_LV_HOR_RES_MAX=128
+CONFIG_LV_VER_RES_MAX=64
+CONFIG_LV_COLOR_DEPTH_1=y
+CONFIG_LV_THEME_MONO=y
+
+CONFIG_LV_PREDEFINED_DISPLAY_WEMOS_LOLIN=y
+
+CONFIG_I2C_MANAGER_0_ENABLED=y
+CONFIG_I2C_MANAGER_0_SDA=5
+CONFIG_I2C_MANAGER_0_SCL=4
+CONFIG_I2C_MANAGER_0_FREQ_HZ=100000

lv_port/esp_lcd_backlight.c

@@ -8,12 +8,10 @@
  *********************/
 #include "esp_lcd_backlight.h"
 #include "driver/ledc.h"
-#include "rom/gpio.h"
+#include "driver/gpio.h"
 #include "esp_log.h"
 #include "soc/ledc_periph.h" // to invert LEDC output on IDF version < v4.3
 
-#define SIG_GPIO_OUT_IDX 128
-
 typedef struct {
     bool pwm_control; // true: LEDC is used, false: GPIO is used
     int index;        // Either GPIO or LEDC channel
@@ -51,7 +49,7 @@ disp_backlight_h disp_backlight_new(const disp_backlight_config_t *config)
         };
         const ledc_timer_config_t LCD_backlight_timer = {
             .speed_mode = LEDC_LOW_SPEED_MODE,
-            .duty_resolution = LEDC_TIMER_10_BIT,
+            .bit_num = LEDC_TIMER_10_BIT,
             .timer_num = config->timer_idx,
             .freq_hz = 5000,
             .clk_cfg = LEDC_AUTO_CLK};

lv_port/lv_port_display_espressif.c

@@ -0,0 +1,161 @@
+#include "freertos/FreeRTOS.h"
+#include "freertos/task.h"
+
+#include "display_port.h"
+
+#include "sdkconfig.h"
+#include "driver/gpio.h"
+
+#include "disp_spi.h"
+#include "lvgl_i2c/i2c_manager.h"
+
+#include <stdbool.h>
+#include <assert.h>
+
+/* NOTE: Needed by the I2C Manager */
+#define OLED_I2C_PORT                       (CONFIG_LV_I2C_DISPLAY_PORT)
+/* FIXME: Be able to get display driver I2C address from Kconfig */
+#if defined (CONFIG_LV_TFT_DISPLAY_CONTROLLER_SSD1306)
+#define OLED_I2C_ADDRESS    0x3C
+#else
+#define OLED_I2C_ADDRESS    0x00
+#endif
+
+// Control byte
+#define OLED_CONTROL_BYTE_CMD_SINGLE        0x80
+#define OLED_CONTROL_BYTE_CMD_STREAM        0x00
+#define OLED_CONTROL_BYTE_DATA_STREAM       0x40
+
+#define LV_DISPLAY_DC_CMD_MODE    0
+#define LV_DISPLAY_DC_DATA_MODE   1
+
+/* Helper functions to get display communication interface kind, this can be
+ * implemented as users see fit, we're using the symbols created by Kconfig
+ * because is what we have available.
+ * Other ways to implement it is using the user_data poiter in lv_disp_drv_t */
+static inline bool display_interface_is_spi(lv_disp_drv_t * drv);
+static inline bool display_interface_is_i2c(lv_disp_drv_t * drv);
+
+void display_port_delay(lv_disp_drv_t *drv, uint32_t delay_ms)
+{
+    (void) drv;
+
+    vTaskDelay(pdMS_TO_TICKS(delay_ms));
+}
+
+void display_port_backlight(lv_disp_drv_t *drv, uint8_t state)
+{
+    (void) drv;
+
+#ifdef CONFIG_LV_DISP_PIN_BCKL
+    gpio_set_level(CONFIG_LV_DISP_PIN_BCKL, state);
+#endif
+}
+
+void display_port_gpio_dc(lv_disp_drv_t *drv, uint8_t state)
+{
+    (void) drv;
+
+#ifdef CONFIG_LV_DISPLAY_USE_DC
+    gpio_set_level(CONFIG_LV_DISP_PIN_DC, state);
+#endif
+}
+
+void display_port_gpio_rst(lv_disp_drv_t *drv, uint8_t state)
+{
+    (void) drv;
+
+#ifdef CONFIG_LV_DISP_USE_RST
+    gpio_set_level(CONFIG_LV_DISP_PIN_RST, state);
+#endif
+}
+
+bool display_port_gpio_is_busy(lv_disp_drv_t *drv)
+{
+    (void) drv;
+
+    bool device_busy = false;
+
+#ifdef CONFIG_LV_DISP_PIN_BUSY
+    /* FIXME Assuming the busy signal in logic 1 means the device is busy */
+    if (gpio_get_level(CONFIG_LV_DISP_PIN_BUSY) == 1) {
+        device_busy = true;
+    }
+#endif
+
+    return device_busy;
+}
+
+void display_interface_send_cmd(lv_disp_drv_t *drv, uint32_t cmd, cmd_width_t cmd_width, void *args, size_t args_len)
+{
+    (void) drv;
+
+    if (display_interface_is_spi(drv)) {
+        disp_wait_for_pending_transactions();
+        display_port_gpio_dc(drv, LV_DISPLAY_DC_CMD_MODE);
+
+        if (CMD_WIDTH_8BITS == cmd_width) {
+            uint8_t cmd_8bits = (uint8_t) cmd & 0xFFU;
+            disp_spi_send_data(&cmd_8bits, 1);
+        }
+        else if (CMD_WIDTH_16BITS == cmd_width) {
+            /* Send 16bits cmd */
+        }
+        else {
+            /* Invalid cmd size */
+            assert(0);
+        }
+
+        if (args != CMD_WITHOUT_ARGS) {
+            display_port_gpio_dc(drv, LV_DISPLAY_DC_DATA_MODE);
+            disp_spi_send_data(args, args_len);
+        }
+    }
+
+    if (display_interface_is_i2c(drv)) {
+        uint8_t *data = (uint8_t *) args;
+        lvgl_i2c_write(OLED_I2C_PORT, OLED_I2C_ADDRESS, cmd, data, args_len);
+    }
+}
+
+void display_interface_send_data(lv_disp_drv_t *drv, void *data, size_t len)
+{
+    (void) drv;
+
+    if (display_interface_is_spi(drv)) {
+        disp_wait_for_pending_transactions();
+        display_port_gpio_dc(drv, LV_DISPLAY_DC_DATA_MODE);
+        disp_spi_send_colors(data, len);
+        /* lv_disp_flush_ready is called in the SPI xfer done callback */
+    }
+
+    if (display_interface_is_i2c(drv)) {
+        lvgl_i2c_write(OLED_I2C_PORT, OLED_I2C_ADDRESS, OLED_CONTROL_BYTE_DATA_STREAM, data, len);
+    }
+}
+
+static inline bool display_interface_is_spi(lv_disp_drv_t * drv)
+{
+    (void) drv;
+
+    bool retval = false;
+
+#if defined (CONFIG_LV_TFT_DISPLAY_PROTOCOL_SPI)
+    retval = true;
+#endif
+
+    return retval;
+}
+
+static inline bool display_interface_is_i2c(lv_disp_drv_t * drv)
+{
+    (void) drv;
+
+    bool retval = false;
+
+#if defined (CONFIG_LV_TFT_DISPLAY_PROTOCOL_I2C)
+    retval = true;
+#endif
+
+    return retval;
+}

lvgl_helpers.c

@@ -6,12 +6,16 @@
 /*********************
  *      INCLUDES
  *********************/
-#include "sdkconfig.h"
 #include "lvgl_helpers.h"
-#include "esp_log.h"
 
-#include "lvgl_tft/disp_spi.h"
-#include "lvgl_touch/tp_spi.h"
+#include "sdkconfig.h"
+
+#include "driver/spi_common.h"
+#include "esp_log.h"
+#include "esp_idf_version.h"
+
+#include "disp_spi.h"
+#include "tp_spi.h"
 
 #include "lvgl_spi_conf.h"
 
@@ -29,6 +33,8 @@
 
  #define TAG "lvgl_helpers"
 
+#define GPIO_NOT_USED   (-1)
+#define DMA_DEFAULT_TRANSFER_SIZE   (0u)
 /**********************
  *      TYPEDEFS
  **********************/
@@ -37,6 +43,20 @@
  *  STATIC PROTOTYPES
  **********************/
 
+/**
+ * Calculates the SPI max transfer size based on the display buffer size
+ *
+ * @return SPI max transfer size in bytes
+ */
+static int calculate_spi_max_transfer_size(const int display_buffer_size);
+
+#if defined (CONFIG_LV_TFT_DISPLAY_CONTROLLER_FT81X)
+/**
+ * Handle FT81X initialization as it's a particular case
+ */
+static void init_ft81x(int dma_channel);
+#endif
+
 /**********************
  *  STATIC VARIABLES
  **********************/
@@ -49,8 +69,8 @@
  *   GLOBAL FUNCTIONS
  **********************/
 
-/* Interface and driver initialization */
-void lvgl_driver_init(void)
+/* Interface (SPI, I2C) initialization */
+void lvgl_interface_init(void)
 {
     /* Since LVGL v8 LV_HOR_RES_MAX and LV_VER_RES_MAX are not defined, so
      * print it only if they are defined. */
@@ -58,87 +78,180 @@ void lvgl_driver_init(void)
     ESP_LOGI(TAG, "Display hor size: %d, ver size: %d", LV_HOR_RES_MAX, LV_VER_RES_MAX);
 #endif
 
-    ESP_LOGI(TAG, "Display buffer size: %d", DISP_BUF_SIZE);
+    size_t display_buffer_size = lvgl_get_display_buffer_size();
+
+    ESP_LOGI(TAG, "Display buffer size: %d", display_buffer_size);
+
+    /* SPI DMA Channel selection
+     * SPI_DMA_CH1 is only defined for ESP32, so let the driver choose which
+     * channel to use, and use the proven channel 1 on esp32 targets */
+    int dma_channel = 3;
+#if defined (CONFIG_IDF_TARGET_ESP32)
+    dma_channel = 1;
+#endif
 
 #if defined (CONFIG_LV_TFT_DISPLAY_CONTROLLER_FT81X)
-    ESP_LOGI(TAG, "Initializing SPI master for FT81X");
-
-    lvgl_spi_driver_init(TFT_SPI_HOST,
-        DISP_SPI_MISO, DISP_SPI_MOSI, DISP_SPI_CLK,
-        SPI_BUS_MAX_TRANSFER_SZ, 1,
-        DISP_SPI_IO2, DISP_SPI_IO3);
-
-    disp_spi_add_device(TFT_SPI_HOST);
-    disp_driver_init();
-
-#if defined (CONFIG_LV_TOUCH_CONTROLLER_FT81X)
-    touch_driver_init();
-#endif
-
-    return;
-#endif
-
-#if defined (SHARED_SPI_BUS)
-    ESP_LOGI(TAG, "Initializing shared SPI master");
-
-    lvgl_spi_driver_init(TFT_SPI_HOST,
-        TP_SPI_MISO, DISP_SPI_MOSI, DISP_SPI_CLK,
-        SPI_BUS_MAX_TRANSFER_SZ, 1,
-        -1, -1);
-
-    disp_spi_add_device(TFT_SPI_HOST);
-    tp_spi_add_device(TOUCH_SPI_HOST);
-
-    disp_driver_init();
-    touch_driver_init();
-
+    init_ft81x(dma_channel);
     return;
 #endif
 
 /* Display controller initialization */
-#if defined CONFIG_LV_TFT_DISPLAY_PROTOCOL_SPI
-    ESP_LOGI(TAG, "Initializing SPI master for display");
+#if defined (CONFIG_LV_TFT_DISPLAY_PROTOCOL_SPI) || defined (SHARED_SPI_BUS)
+    ESP_LOGI(TAG, "Initializing SPI master");
 
-    lvgl_spi_driver_init(TFT_SPI_HOST,
-        DISP_SPI_MISO, DISP_SPI_MOSI, DISP_SPI_CLK,
-        SPI_BUS_MAX_TRANSFER_SZ, 1,
-        DISP_SPI_IO2, DISP_SPI_IO3);
+    int miso = DISP_SPI_MISO;
+    int spi_max_transfer_size = calculate_spi_max_transfer_size(display_buffer_size);
+
+    /* Set the miso signal to be the selected for the touch driver */
+#if defined (SHARED_SPI_BUS)
+    miso = TP_SPI_MISO;
+#endif
+
+    lvgl_spi_driver_init(TFT_SPI_HOST, miso, DISP_SPI_MOSI, DISP_SPI_CLK,
+        spi_max_transfer_size, dma_channel, DISP_SPI_IO2, DISP_SPI_IO3);
 
     disp_spi_add_device(TFT_SPI_HOST);
 
-    disp_driver_init();
+    /* Add device for touch driver */
+#if defined (SHARED_SPI_BUS)
+    tp_spi_add_device(TOUCH_SPI_HOST);
+    touch_driver_init();
+
+    return;
+#endif
+
 #elif defined (CONFIG_LV_I2C_DISPLAY)
-    disp_driver_init();
 #else
 #error "No protocol defined for display controller"
 #endif
 
 /* Touch controller initialization */
 #if CONFIG_LV_TOUCH_CONTROLLER != TOUCH_CONTROLLER_NONE
-    #if defined (CONFIG_LV_TOUCH_DRIVER_PROTOCOL_SPI)
+#if defined (CONFIG_LV_TOUCH_DRIVER_PROTOCOL_SPI)
     ESP_LOGI(TAG, "Initializing SPI master for touch");
 
-        lvgl_spi_driver_init(TOUCH_SPI_HOST,
-            TP_SPI_MISO, TP_SPI_MOSI, TP_SPI_CLK,
-            0 /* Defaults to 4094 */, 2,
-            -1, -1);
+#if defined (CONFIG_IDF_TARGET_ESP32)
+    dma_channel = 2;
+#endif
+
+    lvgl_spi_driver_init(TOUCH_SPI_HOST, TP_SPI_MISO, TP_SPI_MOSI, TP_SPI_CLK,
+        DMA_DEFAULT_TRANSFER_SIZE, dma_channel, GPIO_NOT_USED, GPIO_NOT_USED);
 
     tp_spi_add_device(TOUCH_SPI_HOST);
 
     touch_driver_init();
-    #elif defined (CONFIG_LV_I2C_TOUCH)
+#elif defined (CONFIG_LV_I2C_TOUCH)
     touch_driver_init();
-    #elif defined (CONFIG_LV_TOUCH_DRIVER_ADC)
+#elif defined (CONFIG_LV_TOUCH_DRIVER_ADC)
     touch_driver_init();
-    #elif defined (CONFIG_LV_TOUCH_DRIVER_DISPLAY)
+#elif defined (CONFIG_LV_TOUCH_DRIVER_DISPLAY)
     touch_driver_init();
-    #else
-    #error "No protocol defined for touch controller"
-    #endif
+#else
+#error "No protocol defined for touch controller"
+#endif
 #else
 #endif
 }
 
+void lvgl_display_gpios_init(void)
+{
+    esp_err_t err = ESP_OK;
+    gpio_config_t io_conf = {
+        .pull_up_en = GPIO_PULLUP_DISABLE,
+        .pull_down_en = GPIO_PULLDOWN_DISABLE,
+        .intr_type = GPIO_INTR_DISABLE,
+    };
+
+#ifdef CONFIG_LV_DISPLAY_USE_DC
+    io_conf.mode = GPIO_MODE_OUTPUT;
+    io_conf.pin_bit_mask = (1ULL << CONFIG_LV_DISP_PIN_DC);
+    err = gpio_config(&io_conf);
+    ESP_ERROR_CHECK(err);
+#endif
+
+#ifdef CONFIG_LV_DISP_USE_RST
+    io_conf.mode = GPIO_MODE_OUTPUT;
+    io_conf.pin_bit_mask = (1ULL << CONFIG_LV_DISP_PIN_RST);
+    err = gpio_config(&io_conf);
+    ESP_ERROR_CHECK(err);
+#endif
+
+#if !defined(CONFIG_LV_DISP_BACKLIGHT_OFF) && defined(CONFIG_LV_DISP_PIN_BCKL) && \
+    (CONFIG_LV_DISP_PIN_BCKL > 0)
+    io_conf.mode = GPIO_MODE_OUTPUT;
+    io_conf.pin_bit_mask = (1ULL << CONFIG_LV_DISP_PIN_BCKL);
+    err = gpio_config(&io_conf);
+    ESP_ERROR_CHECK(err);
+#endif
+
+#ifdef CONFIG_LV_DISP_USE_BUSY
+    io_conf.mode = GPIO_MODE_INPUT;
+    io_conf.pin_bit_mask = (1ULL << CONFIG_LV_DISP_PIN_BUSY);
+    err = gpio_config(&io_conf);
+    ESP_ERROR_CHECK(err);
+#endif
+}
+
+/* DISP_BUF_SIZE value doesn't have an special meaning, but it's the size
+ * of the buffer(s) passed to LVGL as display buffers. The default values used
+ * were the values working for the contributor of the display controller.
+ *
+ * As LVGL supports partial display updates the DISP_BUF_SIZE doesn't
+ * necessarily need to be equal to the display size.
+ *
+ * When using RGB displays the display buffer size will also depends on the
+ * color format being used, for RGB565 each pixel needs 2 bytes.
+ * When using the mono theme, the display pixels can be represented in one bit,
+ * so the buffer size can be divided by 8, e.g. see SSD1306 display size. */
+size_t lvgl_get_display_buffer_size(void)
+{
+    size_t disp_buffer_size = 0;
+
+#if LVGL_VERSION_MAJOR < 8
+#if defined (CONFIG_CUSTOM_DISPLAY_BUFFER_SIZE)
+    disp_buffer_size = CONFIG_CUSTOM_DISPLAY_BUFFER_BYTES;
+#else
+    /* Calculate total of 40 lines of display horizontal size */
+#if defined (CONFIG_LV_TFT_DISPLAY_CONTROLLER_ST7789)   ||  \
+    defined (CONFIG_LV_TFT_DISPLAY_CONTROLLER_ST7735S)  ||  \
+    defined (CONFIG_LV_TFT_DISPLAY_CONTROLLER_ST7796S)  ||  \
+    defined (CONFIG_LV_TFT_DISPLAY_CONTROLLER_HX8357)   ||  \
+    defined (CONFIG_LV_TFT_DISPLAY_CONTROLLER_ILI9481)  ||  \
+    defined (CONFIG_LV_TFT_DISPLAY_CONTROLLER_ILI9486)  ||  \
+    defined (CONFIG_LV_TFT_DISPLAY_CONTROLLER_ILI9488)  ||  \
+    defined (CONFIG_LV_TFT_DISPLAY_CONTROLLER_ILI9341)  ||  \
+    defined (CONFIG_LV_TFT_DISPLAY_CONTROLLER_FT81X)    ||  \
+    defined (CONFIG_LV_TFT_DISPLAY_CONTROLLER_RA8875)   ||  \
+    defined (CONFIG_LV_TFT_DISPLAY_CONTROLLER_GC9A01)   ||  \
+    defined (CONFIG_LV_TFT_DISPLAY_CONTROLLER_ILI9163C)
+    disp_buffer_size = LV_HOR_RES_MAX * 40;
+#elif defined CONFIG_LV_TFT_DISPLAY_CONTROLLER_SH1107
+    disp_buffer_size = LV_HOR_RES_MAX * LV_VER_RES_MAX;
+#elif defined CONFIG_LV_TFT_DISPLAY_CONTROLLER_SSD1306
+#if defined (CONFIG_LV_THEME_MONO)
+    disp_buffer_size = LV_HOR_RES_MAX * (LV_VER_RES_MAX / 8);
+#else
+    disp_buffer_size = LV_HOR_RES_MAX * LV_VER_RES_MAX);
+#endif
+#elif defined (CONFIG_LV_TFT_DISPLAY_CONTROLLER_IL3820)
+    disp_buffer_size = LV_VER_RES_MAX * IL3820_COLUMNS;
+#elif defined (CONFIG_LV_TFT_DISPLAY_CONTROLLER_JD79653A)
+    disp_buffer_size = ((LV_VER_RES_MAX * LV_VER_RES_MAX) / 8); // 5KB
+#elif defined (CONFIG_LV_TFT_DISPLAY_CONTROLLER_UC8151D)
+    disp_buffer_size = ((LV_VER_RES_MAX * LV_VER_RES_MAX) / 8); // 2888 bytes
+#elif defined (CONFIG_LV_TFT_DISPLAY_CONTROLLER_PCD8544)
+    disp_buffer_size = (LV_HOR_RES_MAX * (LV_VER_RES_MAX / 8));
+#else
+#error "No display controller selected"
+#endif
+#endif
+
+#else /* LVGL v8 */
+    /* ToDo: Implement display buffer size calculation with configuration values from the display driver */
+#endif
+
+    return disp_buffer_size;
+}
 
 /* Initialize spi bus master
  *
@@ -154,7 +267,12 @@ bool lvgl_spi_driver_init(int host,
     int dma_channel,
     int quadwp_pin, int quadhd_pin)
 {
-    assert((0 <= host) && (3 > host));
+#if defined (SPI_HOST_MAX)
+    assert((SPI1_HOST <= host) && (SPI_HOST_MAX > host));
+#else
+    assert((SPI1_HOST <= host) && ((SPI3_HOST + 1) > host));
+#endif
+
     const char *spi_names[] = {
         "SPI1_HOST", "SPI2_HOST", "SPI3_HOST"
     };
@@ -175,11 +293,55 @@ bool lvgl_spi_driver_init(int host,
     };
 
     ESP_LOGI(TAG, "Initializing SPI bus...");
-    #if defined (CONFIG_IDF_TARGET_ESP32C3)
-    dma_channel = SPI_DMA_CH_AUTO;
-    #endif
-    esp_err_t ret = spi_bus_initialize(host, &buscfg, (spi_dma_chan_t)dma_channel);
+
+#if ESP_IDF_VERSION >= ESP_IDF_VERSION_VAL(4, 3, 0)
+    esp_err_t ret = spi_bus_initialize((spi_host_device_t) host, &buscfg, (spi_dma_chan_t)dma_channel);
+#else
+    esp_err_t ret = spi_bus_initialize(host, &buscfg, dma_channel);
+#endif
+    
     assert(ret == ESP_OK);
 
     return ESP_OK != ret;
 }
+
+static int calculate_spi_max_transfer_size(const int display_buffer_size)
+{
+    int retval = 0;
+    
+#if defined (CONFIG_LV_TFT_DISPLAY_CONTROLLER_ILI9481) || \
+    defined (CONFIG_LV_TFT_DISPLAY_CONTROLLER_ILI9488)
+    retval = display_buffer_size * 3;
+#elif defined (CONFIG_LV_TFT_DISPLAY_CONTROLLER_ILI9341)  || \
+      defined (CONFIG_LV_TFT_DISPLAY_CONTROLLER_ST7789)   || \
+      defined (CONFIG_LV_TFT_DISPLAY_CONTROLLER_ST7735S)  || \
+      defined (CONFIG_LV_TFT_DISPLAY_CONTROLLER_HX8357)   || \
+      defined (CONFIG_LV_TFT_DISPLAY_CONTROLLER_SH1107)   || \
+      defined (CONFIG_LV_TFT_DISPLAY_CONTROLLER_FT81X)    || \
+      defined (CONFIG_LV_TFT_DISPLAY_CONTROLLER_IL3820)   || \
+      defined (CONFIG_LV_TFT_DISPLAY_CONTROLLER_JD79653A) || \
+      defined (CONFIG_LV_TFT_DISPLAY_CONTROLLER_ILI9163C)
+    retval = display_buffer_size * 2;
+#else
+    retval = display_buffer_size * 2;
+#endif
+    
+    return retval;
+}
+
+#if defined (CONFIG_LV_TFT_DISPLAY_CONTROLLER_FT81X)
+static void init_ft81x(int dma_channel)
+{
+    size_t display_buffer_size = lvgl_get_display_buffer_size();
+    int spi_max_transfer_size = calculate_spi_max_transfer_size(display_buffer_size);
+
+    lvgl_spi_driver_init(TFT_SPI_HOST, DISP_SPI_MISO, DISP_SPI_MOSI, DISP_SPI_CLK,
+        spi_max_transfer_size, dma_channel, DISP_SPI_IO2, DISP_SPI_IO3);
+
+    disp_spi_add_device(TFT_SPI_HOST);
+
+#if defined (CONFIG_LV_TOUCH_CONTROLLER_FT81X)
+    touch_driver_init();
+#endif
+}
+#endif

lvgl_helpers.h

@@ -23,68 +23,6 @@ extern "C" {
  *      DEFINES
  *********************/
 
-/* DISP_BUF_SIZE value doesn't have an special meaning, but it's the size
- * of the buffer(s) passed to LVGL as display buffers. The default values used
- * were the values working for the contributor of the display controller.
- *
- * As LVGL supports partial display updates the DISP_BUF_SIZE doesn't
- * necessarily need to be equal to the display size.
- *
- * When using RGB displays the display buffer size will also depends on the
- * color format being used, for RGB565 each pixel needs 2 bytes.
- * When using the mono theme, the display pixels can be represented in one bit,
- * so the buffer size can be divided by 8, e.g. see SSD1306 display size. */
-#if defined (CONFIG_CUSTOM_DISPLAY_BUFFER_SIZE)
-#define DISP_BUF_SIZE   CONFIG_CUSTOM_DISPLAY_BUFFER_BYTES
-#else
-#if defined (CONFIG_LV_TFT_DISPLAY_CONTROLLER_ST7789)
-#define DISP_BUF_SIZE  (LV_HOR_RES_MAX * 40)
-#elif defined CONFIG_LV_TFT_DISPLAY_CONTROLLER_ST7735S
-#define DISP_BUF_SIZE  (LV_HOR_RES_MAX * 40)
-#elif defined CONFIG_LV_TFT_DISPLAY_CONTROLLER_ST7796S
-#define DISP_BUF_SIZE  (LV_HOR_RES_MAX * 40)
-#elif defined CONFIG_LV_TFT_DISPLAY_CONTROLLER_HX8357
-#define DISP_BUF_SIZE  (LV_HOR_RES_MAX * 40)
-#elif defined CONFIG_LV_TFT_DISPLAY_CONTROLLER_SH1107
-#define DISP_BUF_SIZE  (LV_HOR_RES_MAX * LV_VER_RES_MAX)
-#elif defined CONFIG_LV_TFT_DISPLAY_CONTROLLER_ILI9481
-#define DISP_BUF_SIZE  (LV_HOR_RES_MAX * 40)
-#elif defined CONFIG_LV_TFT_DISPLAY_CONTROLLER_ILI9486
-#define DISP_BUF_SIZE  (LV_HOR_RES_MAX * 40)
-#elif defined CONFIG_LV_TFT_DISPLAY_CONTROLLER_ILI9488
-#define DISP_BUF_SIZE  (LV_HOR_RES_MAX * 40)
-#elif defined CONFIG_LV_TFT_DISPLAY_CONTROLLER_ILI9341
-#define DISP_BUF_SIZE  (LV_HOR_RES_MAX * 40)
-#elif defined CONFIG_LV_TFT_DISPLAY_CONTROLLER_SSD1306
-#if defined (CONFIG_LV_THEME_MONO)
-#define DISP_BUF_SIZE  (LV_HOR_RES_MAX * (LV_VER_RES_MAX / 8))
-#else
-#define DISP_BUF_SIZE  (LV_HOR_RES_MAX * LV_VER_RES_MAX)
-#endif
-#elif defined (CONFIG_LV_TFT_DISPLAY_CONTROLLER_FT81X)
-#define DISP_BUF_LINES  40
-#define DISP_BUF_SIZE  (LV_HOR_RES_MAX * DISP_BUF_LINES)
-#elif defined (CONFIG_LV_TFT_DISPLAY_CONTROLLER_IL3820)
-#define DISP_BUF_SIZE (LV_VER_RES_MAX * IL3820_COLUMNS)
-#elif defined CONFIG_LV_TFT_DISPLAY_CONTROLLER_RA8875
-#define DISP_BUF_SIZE  (LV_HOR_RES_MAX * 40)
-#elif defined (CONFIG_LV_TFT_DISPLAY_CONTROLLER_GC9A01)
-#define DISP_BUF_SIZE  (LV_HOR_RES_MAX * 40)
-#elif defined (CONFIG_LV_TFT_DISPLAY_CONTROLLER_JD79653A)
-#define DISP_BUF_SIZE ((LV_VER_RES_MAX * LV_VER_RES_MAX) / 8) // 5KB
-#elif defined (CONFIG_LV_TFT_DISPLAY_CONTROLLER_UC8151D)
-#define DISP_BUF_SIZE ((LV_VER_RES_MAX * LV_VER_RES_MAX) / 8) // 2888 bytes
-#elif defined CONFIG_LV_TFT_DISPLAY_CONTROLLER_ILI9163C
-#define DISP_BUF_SIZE (LV_HOR_RES_MAX * 40)
-#elif defined (CONFIG_LV_TFT_DISPLAY_CONTROLLER_PCD8544)
-#define DISP_BUF_SIZE  (LV_HOR_RES_MAX * (LV_VER_RES_MAX / 8))
-#elif defined (CONFIG_LV_TFT_DISPLAY_CONTROLLER_SCHMITT)
-#define DISP_BUF_SIZE  (LV_HOR_RES_MAX * LV_VER_RES_MAX)
-#else
-#error "No display controller selected"
-#endif
-#endif
-
 /**********************
  *      TYPEDEFS
  **********************/
@@ -96,12 +34,18 @@ extern "C" {
 void lvgl_i2c_locking(void* leader);
 
 /* Initialize detected SPI and I2C bus and devices */
-void lvgl_driver_init(void);
+void lvgl_interface_init(void);
 
 /* Initialize SPI master  */
 bool lvgl_spi_driver_init(int host, int miso_pin, int mosi_pin, int sclk_pin,
     int max_transfer_sz, int dma_channel, int quadwp_pin, int quadhd_pin);
 
+/* Initialize display GPIOs, e.g. DC and RST pins */
+void lvgl_display_gpios_init(void);
+
+/* Get display buffer size */
+size_t lvgl_get_display_buffer_size(void);
+
 /**********************
  *      MACROS
  **********************/

lvgl_spi_conf.h

@@ -6,6 +6,8 @@
 #ifndef LVGL_SPI_CONF_H
 #define LVGL_SPI_CONF_H
 
+#include <sdkconfig.h>
+
 #ifdef __cplusplus
 extern "C" {
 #endif
@@ -18,25 +20,32 @@ extern "C" {
  *      DEFINES
  *********************/
 // DISPLAY PINS
+
+/* Mandatory pins are MOSI and CLK */
 #define DISP_SPI_MOSI CONFIG_LV_DISP_SPI_MOSI
+#define DISP_SPI_CLK CONFIG_LV_DISP_SPI_CLK
+
+/* Optional pins */
 #if defined (CONFIG_LV_DISPLAY_USE_SPI_MISO)
-    #define DISP_SPI_MISO CONFIG_LV_DISP_SPI_MISO
-    #define DISP_SPI_INPUT_DELAY_NS CONFIG_LV_DISP_SPI_INPUT_DELAY_NS
+#define DISP_SPI_MISO CONFIG_LV_DISP_SPI_MISO
+#define DISP_SPI_INPUT_DELAY_NS CONFIG_LV_DISP_SPI_INPUT_DELAY_NS
 #else
-    #define DISP_SPI_MISO (-1)
-    #define DISP_SPI_INPUT_DELAY_NS (0)
+#define DISP_SPI_MISO (-1)
+#define DISP_SPI_INPUT_DELAY_NS (0U)
 #endif
+
 #if defined(CONFIG_LV_DISP_SPI_IO2)
 #define DISP_SPI_IO2 CONFIG_LV_DISP_SPI_IO2
 #else
 #define DISP_SPI_IO2 (-1)
 #endif
+
 #if defined(CONFIG_LV_DISP_SPI_IO3)
 #define DISP_SPI_IO3 CONFIG_LV_DISP_SPI_IO3
 #else
 #define DISP_SPI_IO3 (-1)
 #endif
-#define DISP_SPI_CLK CONFIG_LV_DISP_SPI_CLK
+
 #if defined (CONFIG_LV_DISPLAY_USE_SPI_CS)
     #define DISP_SPI_CS CONFIG_LV_DISP_SPI_CS
 #else
@@ -50,24 +59,38 @@ extern "C" {
 #if defined (CONFIG_LV_TFT_DISPLAY_CONTROLLER_FT81X) && \
     defined (CONFIG_LV_TOUCH_CONTROLLER_FT81X)
 
-    #define TP_SPI_MOSI CONFIG_LV_DISP_SPI_MOSI
-    #define TP_SPI_MISO CONFIG_LV_DISP_SPI_MISO
-    #define TP_SPI_CLK  CONFIG_LV_DISP_SPI_CLK
-    #define TP_SPI_CS   CONFIG_LV_DISP_SPI_CS
+#define SHARED_SPI_BUS
+
+#define TP_SPI_MOSI CONFIG_LV_DISP_SPI_MOSI
+#define TP_SPI_MISO CONFIG_LV_DISP_SPI_MISO
+#define TP_SPI_CLK  CONFIG_LV_DISP_SPI_CLK
+#define TP_SPI_CS   CONFIG_LV_DISP_SPI_CS
 #else
-    #define TP_SPI_MOSI CONFIG_LV_TOUCH_SPI_MOSI
-    #define TP_SPI_MISO CONFIG_LV_TOUCH_SPI_MISO
-    #define TP_SPI_CLK  CONFIG_LV_TOUCH_SPI_CLK
-    #define TP_SPI_CS   CONFIG_LV_TOUCH_SPI_CS
+#define TP_SPI_MOSI CONFIG_LV_TOUCH_SPI_MOSI
+#define TP_SPI_MISO CONFIG_LV_TOUCH_SPI_MISO
+#define TP_SPI_CLK  CONFIG_LV_TOUCH_SPI_CLK
+#define TP_SPI_CS   CONFIG_LV_TOUCH_SPI_CS
 #endif
 #endif
 
 #define ENABLE_TOUCH_INPUT  CONFIG_LV_ENABLE_TOUCH
 
+#if defined (CONFIG_LV_TFT_DISPLAY_PROTOCOL_SPI)
+/* Display controller SPI host configuration */
 #if defined (CONFIG_LV_TFT_DISPLAY_SPI2_HOST)
 #define TFT_SPI_HOST SPI2_HOST
 #elif defined (CONFIG_LV_TFT_DISPLAY_SPI3_HOST)
 #define TFT_SPI_HOST SPI3_HOST
+#else
+#error SPI host not defined
+#endif
+#endif
+
+/* Touch controller SPI host configuration */
+#if defined (CONFIG_LV_TOUCH_CONTROLLER_SPI2_HOST)
+#define TOUCH_SPI_HOST SPI2_HOST
+#elif defined (CONFIG_LV_TOUCH_CONTROLLER_SPI3_HOST)
+#define TOUCH_SPI_HOST SPI3_HOST
 #endif
 
 #if defined (CONFIG_LV_TFT_DISPLAY_SPI_HALF_DUPLEX)
@@ -84,61 +107,30 @@ extern "C" {
 #define DISP_SPI_TRANS_MODE_SIO
 #endif
 
-#if defined (CONFIG_LV_TOUCH_CONTROLLER_SPI2_HOST)
-#define TOUCH_SPI_HOST SPI2_HOST
-#elif defined (CONFIG_LV_TOUCH_CONTROLLER_SPI3_HOST)
-#define TOUCH_SPI_HOST SPI3_HOST
-#endif
+/* Detect usage of shared SPI bus between display and indev controllers
+ *
+ * If the user sets the same MOSI and CLK pins for both display and indev
+ * controllers then we can assume the user is using the same SPI bus
+ * If so verify the user specified the same SPI bus for both */
+#if !defined (CONFIG_LV_TFT_DISPLAY_CONTROLLER_FT81X)
 
-/* Handle the FT81X Special case */
-#if defined (CONFIG_LV_TFT_DISPLAY_CONTROLLER_FT81X)
+#if defined (CONFIG_LV_TFT_DISPLAY_PROTOCOL_SPI) && \
+            (CONFIG_LV_TFT_DISPLAY_PROTOCOL_SPI == 1) && \
+    defined (CONFIG_LV_TOUCH_DRIVER_PROTOCOL_SPI) && \
+            (TP_SPI_MOSI == DISP_SPI_MOSI) && (TP_SPI_CLK == DISP_SPI_CLK)
 
-#if defined (CONFIG_LV_TOUCH_CONTROLLER_FT81X)
-#define SHARED_SPI_BUS
-#else
-/* Empty */
-#endif
-
-#else
-// Detect the use of a shared SPI Bus and verify the user specified the same SPI bus for both touch and tft
-#if defined (CONFIG_LV_TOUCH_DRIVER_PROTOCOL_SPI) && TP_SPI_MOSI == DISP_SPI_MOSI && TP_SPI_CLK == DISP_SPI_CLK
 #if TFT_SPI_HOST != TOUCH_SPI_HOST
 #error You must specify the same SPI host (SPIx_HOST) for both display and touch driver
-#endif
-
+#else
 #define SHARED_SPI_BUS
 #endif
 
+#endif
 #endif
 
 /**********************
  *      TYPEDEFS
  **********************/
-#if defined (CONFIG_LV_TFT_DISPLAY_CONTROLLER_SCHMITT)
-
-#define SPI_BUS_MAX_TRANSFER_SZ (DISP_BUF_SIZE * 4)
-
-#elif defined (CONFIG_LV_TFT_DISPLAY_CONTROLLER_ILI9481) || \
-    defined (CONFIG_LV_TFT_DISPLAY_CONTROLLER_ILI9488)
-
-#define SPI_BUS_MAX_TRANSFER_SZ (DISP_BUF_SIZE * 3)
-
-#elif defined (CONFIG_LV_TFT_DISPLAY_CONTROLLER_ILI9341)  || \
-      defined (CONFIG_LV_TFT_DISPLAY_CONTROLLER_ST7789)   || \
-      defined (CONFIG_LV_TFT_DISPLAY_CONTROLLER_ST7735S)  || \
-      defined (CONFIG_LV_TFT_DISPLAY_CONTROLLER_HX8357)   || \
-      defined (CONFIG_LV_TFT_DISPLAY_CONTROLLER_SH1107)   || \
-      defined (CONFIG_LV_TFT_DISPLAY_CONTROLLER_FT81X)    || \
-      defined (CONFIG_LV_TFT_DISPLAY_CONTROLLER_IL3820)   || \
-      defined (CONFIG_LV_TFT_DISPLAY_CONTROLLER_JD79653A) || \
-      defined (CONFIG_LV_TFT_DISPLAY_CONTROLLER_ILI9163C)
-
-#define SPI_BUS_MAX_TRANSFER_SZ (DISP_BUF_SIZE * 2)
-
-#else
-#define SPI_BUS_MAX_TRANSFER_SZ (DISP_BUF_SIZE * 2)
-#endif
-
 #if defined (CONFIG_LV_TFT_USE_CUSTOM_SPI_CLK_DIVIDER)
 #define SPI_TFT_CLOCK_SPEED_HZ ((80 * 1000 * 1000) / CONFIG_LV_TFT_CUSTOM_SPI_CLK_DIVIDER)
 #else
@@ -159,31 +151,30 @@ extern "C" {
 #elif defined (CONFIG_LV_TFT_DISPLAY_CONTROLLER_ILI9341)
 #define SPI_TFT_CLOCK_SPEED_HZ  (40*1000*1000)
 #elif defined(CONFIG_LV_TFT_DISPLAY_CONTROLLER_ILI9163C)
-#define SPI_TFT_CLOCK_SPEED_HZ (40 * 1000 * 1000)
+#define SPI_TFT_CLOCK_SPEED_HZ  (40*1000*1000)
 #elif defined(CONFIG_LV_TFT_DISPLAY_CONTROLLER_FT81X)
 #define SPI_TFT_CLOCK_SPEED_HZ  (32*1000*1000)
 #elif defined (CONFIG_LV_TFT_DISPLAY_CONTROLLER_PCD8544)
 #define SPI_TFT_CLOCK_SPEED_HZ  (4*1000*1000)
 #else
-#define SPI_TFT_CLOCK_SPEED_HZ  (5*1000*1000) // Set to 40 later
-#endif
-
+#define SPI_TFT_CLOCK_SPEED_HZ  (40*1000*1000)
 #endif
 
+#endif /* CONFIG_LV_TFT_USE_CUSTOM_SPI_CLK_DIVIDER */
 
 #if defined (CONFIG_LV_TFT_DISPLAY_CONTROLLER_ST7789)
-#define SPI_TFT_SPI_MODE    (2)
+#define SPI_TFT_SPI_MODE    (2U)
 #else
-#define SPI_TFT_SPI_MODE    (0)
+#define SPI_TFT_SPI_MODE    (0U)
 #endif
 
 /* Touch driver */
 #if (CONFIG_LV_TOUCH_CONTROLLER == TOUCH_CONTROLLER_STMPE610)
 #define SPI_TOUCH_CLOCK_SPEED_HZ    (1*1000*1000)
-#define SPI_TOUCH_SPI_MODE          (1)
+#define SPI_TOUCH_SPI_MODE          (1U)
 #else
 #define SPI_TOUCH_CLOCK_SPEED_HZ    (2*1000*1000)
-#define SPI_TOUCH_SPI_MODE          (0)
+#define SPI_TOUCH_SPI_MODE          (0U)
 #endif
 
 /**********************

lvgl_tft/EVE_commands.c

@@ -41,6 +41,11 @@ TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR TH
 
 
 #include <stdio.h>
+#include <string.h>
+
+#if defined (BT81X_ENABLE)
+#include <stdarg.h>
+#endif
 
 #include "EVE.h"
 #include "EVE_commands.h"
@@ -50,19 +55,8 @@ TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR TH
 #include "driver/gpio.h"
 #include "esp_log.h"
 #include "soc/soc_memory_layout.h"
-
-#include "esp_log.h"
-
 #include "disp_spi.h"
 
-#include <string.h>
-
-#if defined (BT81X_ENABLE)
-#include <stdarg.h>
-#endif
-
-#define TAG_LOG "FT81X"
-
 /* data structure for SPI reading that has (optional) space for inserted dummy byte */
 typedef struct _spi_read_data {
 #if defined(DISP_SPI_FULL_DUPLEX)
@@ -273,7 +267,13 @@ void EVE_memWrite_buffer(uint32_t ftAddress, const uint8_t *data, uint32_t len,
 	uint32_t bytes_left = len;
 	while(bytes_left > 0)
 	{
-		uint32_t block_len = (bytes_left > SPI_TRANSER_SIZE ? SPI_TRANSER_SIZE : bytes_left);
+        uint32_t block_len = 0;
+        
+#if defined (SPI_TRANSFER_SIZE)
+		block_len = (bytes_left > SPI_TRANSER_SIZE ? SPI_TRANSER_SIZE : bytes_left);
+#else
+        /* ToDo Update SPI_TRANSFER_SIZE calculation, it's based on the DISP_BUF_SIZE */
+#endif
 
 		// only send flush on last chunk
 		disp_spi_send_flag_t flush_flag = 0;
@@ -334,7 +334,6 @@ uint8_t EVE_busy(void)
 
 		cmdOffset += 8;
 
-		BUFFER_SPI_BYTE
 		BUFFER_SPI_BYTE(MEM_WRITE | 0x30); /* send Memory Write plus high address byte of REG_CMD_WRITE for EVE81x */
 		BUFFER_SPI_BYTE(0x20);	/* send middle address byte of REG_CMD_WRITE for EVE81x */
 		BUFFER_SPI_BYTE(0xfc);	/* send low address byte of REG_CMD_WRITE for EVE81x */
@@ -875,13 +874,13 @@ uint8_t EVE_init(void)
 
 	/* The most reliable DIO/QIO switching point is after EVE start up but before reading the ChipID. */
 #if defined(DISP_SPI_TRANS_MODE_DIO)
-	ESP_LOGI(TAG_LOG, "Switching to DIO mode");
+	LV_LOG_INFO("Switching to DIO mode");
 	DELAY_MS(20);	/* different boards may take a different delay but this generally seems to work */
 	EVE_memWrite16(REG_SPI_WIDTH, SPI_WIDTH_DIO);
 	SPIInherentSendFlags = DISP_SPI_MODE_DIO | DISP_SPI_MODE_DIOQIO_ADDR;
 	SPIDummyReadBits = 4;	/* Esp32 DMA SPI transaction dummy_bits works more like clock cycles, so in DIO 4 dummy_bits == 8 total bits */
 #elif defined(DISP_SPI_TRANS_MODE_QIO)
-	ESP_LOGI(TAG_LOG, "Switching to QIO mode");
+	LV_LOG_INFO("Switching to QIO mode");
 	DELAY_MS(20);	/* different boards may take a different delay but this generally seems to work */
 	EVE_memWrite16(REG_SPI_WIDTH, SPI_WIDTH_QIO);
 	SPIInherentSendFlags = DISP_SPI_MODE_QIO | DISP_SPI_MODE_DIOQIO_ADDR;
@@ -897,7 +896,7 @@ uint8_t EVE_init(void)
 		timeout++;
 		if(timeout > 400)
 		{
-			ESP_LOGI(TAG_LOG, "Failed to read ChipID...aborting initialization.");
+			LV_LOG_WARN("Failed to read ChipID...aborting initialization.");
 			return 0;
 		}
 	}
@@ -909,7 +908,7 @@ uint8_t EVE_init(void)
 		timeout++;
 		if(timeout > 50) /* experimental, 10 was the lowest value to get the BT815 started with, the touch-controller was the last to get out of reset */
 		{
-			ESP_LOGI(TAG_LOG, "Failed to read CPU status...aborting initialization.");
+			LV_LOG_WARN("Failed to read CPU status...aborting initialization.");
 			return 0;
 		}
 	}

lvgl_tft/EVE_config.h

@@ -51,7 +51,11 @@ TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR TH
 #define EVE_PDN		    CONFIG_LV_DISP_PIN_RST	// grey
 #define EVE_USE_PDN		CONFIG_LV_DISP_USE_RST
 
+#if defined (DISP_BUF_SIZE)
 #define SPI_TRANSER_SIZE (DISP_BUF_SIZE * (LV_COLOR_DEPTH / 8))
+#else
+    /* ToDo Update using new API */
+#endif
 
 #define BYTES_PER_PIXEL (LV_COLOR_DEPTH / 8)	// bytes per pixel for (16 for RGB565)
 #define BYTES_PER_LINE (EVE_HSIZE * BYTES_PER_PIXEL)
@@ -208,6 +212,8 @@ TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR TH
 #define EVE_SUNFLOWER
 #elif defined(CONFIG_LV_FT81X_CONFIG_EVE_CONNECTEVE)
 #define EVE_CONNECTEVE
+#else
+#define EVE_EVE2_35 // Define something if there is no Kconfig option selected
 #endif
 
 /* display timing parameters below */

lvgl_tft/GC9A01.c

@@ -16,7 +16,6 @@
 /*********************
  *      DEFINES
  *********************/
- #define TAG "GC9A01"
 
 /**********************
  *      TYPEDEFS
@@ -37,6 +36,7 @@ static void GC9A01_set_orientation(uint8_t orientation);
 static void GC9A01_send_cmd(uint8_t cmd);
 static void GC9A01_send_data(void * data, uint16_t length);
 static void GC9A01_send_color(void * data, uint16_t length);
+static void GC9A01_reset(void);
 
 /**********************
  *  STATIC VARIABLES
@@ -111,22 +111,9 @@ void GC9A01_init(void)
 
 	};
 
-	//Initialize non-SPI GPIOs
-    gpio_pad_select_gpio(GC9A01_DC);
-	gpio_set_direction(GC9A01_DC, GPIO_MODE_OUTPUT);
+        GC9A01_reset();
 
-#if GC9A01_USE_RST
-    gpio_pad_select_gpio(GC9A01_RST);
-	gpio_set_direction(GC9A01_RST, GPIO_MODE_OUTPUT);
-
-	//Reset the display
-	gpio_set_level(GC9A01_RST, 0);
-	vTaskDelay(100 / portTICK_RATE_MS);
-	gpio_set_level(GC9A01_RST, 1);
-	vTaskDelay(100 / portTICK_RATE_MS);
-#endif
-
-	ESP_LOGI(TAG, "Initialization.");
+	LV_LOG_INFO("Initialization.");
 
 	//Send all the commands
 	uint16_t cmd = 0;
@@ -220,24 +207,36 @@ static void GC9A01_send_color(void * data, uint16_t length)
 
 static void GC9A01_set_orientation(uint8_t orientation)
 {
-    // ESP_ASSERT(orientation < 4);
+    assert(orientation < 4);
 
+#if defined CONFIG_LV_PREDEFINED_DISPLAY_M5STACK
+    const uint8_t data[] = {0x68, 0x68, 0x08, 0x08};
+#elif defined (CONFIG_LV_PREDEFINED_DISPLAY_WROVER4)
+    const uint8_t data[] = {0x4C, 0x88, 0x28, 0xE8};
+#else
+    const uint8_t data[] = {0x08, 0xC8, 0x68, 0xA8};
+#endif
+
+#if (LV_USE_LOG == 1)
     const char *orientation_str[] = {
         "PORTRAIT", "PORTRAIT_INVERTED", "LANDSCAPE", "LANDSCAPE_INVERTED"
     };
 
-    ESP_LOGI(TAG, "Display orientation: %s", orientation_str[orientation]);
-
-#if defined CONFIG_LV_PREDEFINED_DISPLAY_M5STACK
-    uint8_t data[] = {0x68, 0x68, 0x08, 0x08};  ///
-#elif defined (CONFIG_LV_PREDEFINED_DISPLAY_WROVER4)
-    uint8_t data[] = {0x4C, 0x88, 0x28, 0xE8}; ///
-#elif defined (CONFIG_LV_PREDEFINED_DISPLAY_NONE)
-    uint8_t data[] = {0x08, 0xC8, 0x68, 0xA8}; ///ggggg
+    LV_LOG_INFO("Display orientation: %s", orientation_str[orientation]);
+    LV_LOG_INFO("0x36 command value: 0x%02X", data[orientation]);
 #endif
 
-    ESP_LOGI(TAG, "0x36 command value: 0x%02X", data[orientation]);
-
     GC9A01_send_cmd(0x36);
     GC9A01_send_data((void *) &data[orientation], 1);
 }
+
+static void GC9A01_reset(void)
+{
+#if GC9A01_USE_RST
+    //Reset the display
+    gpio_set_level(GC9A01_RST, 0);
+    vTaskDelay(100 / portTICK_RATE_MS);
+    gpio_set_level(GC9A01_RST, 1);
+    vTaskDelay(100 / portTICK_RATE_MS);
+#endif
+}

lvgl_tft/Kconfig

@@ -178,10 +178,6 @@ menu "LVGL TFT Display controller"
         bool
         help
             PCD8544 display controller (Nokia 3110/5110)
-    config LV_TFT_DISPLAY_CONTROLLER_SCHMITT
-        bool
-        help
-            Schmitt's display controller
     # Display controller communication protocol
     #
     # This symbols define the communication protocol used by the
@@ -230,15 +226,15 @@ menu "LVGL TFT Display controller"
     config LV_TFT_DISPLAY_X_OFFSET
         depends on LV_TFT_DISPLAY_OFFSETS
         int "X offset"
-        default 40 if LV_PREDEFINED_DISPLAY_TTGO && (LV_DISPLAY_ORIENTATION_LANDSCAPE || LV_DISPLAY_ORIENTATION_LANDSCAPE_INVERTED)
-        default 53 if LV_PREDEFINED_DISPLAY_TTGO && (LV_DISPLAY_ORIENTATION_PORTRAIT  || LV_DISPLAY_ORIENTATION_PORTRAIT_INVERTED)
+        default 40 if LV_PREDEFINED_DISPLAY_TTGO && (DISPLAY_ORIENTATION_LANDSCAPE || DISPLAY_ORIENTATION_LANDSCAPE_INVERTED)
+        default 53 if LV_PREDEFINED_DISPLAY_TTGO && (DISPLAY_ORIENTATION_PORTRAIT  || DISPLAY_ORIENTATION_PORTRAIT_INVERTED)
         default 0
 
     config LV_TFT_DISPLAY_Y_OFFSET
         depends on LV_TFT_DISPLAY_OFFSETS
         int "Y offset"
-        default 53  if LV_PREDEFINED_DISPLAY_TTGO && (LV_DISPLAY_ORIENTATION_LANDSCAPE || LV_DISPLAY_ORIENTATION_LANDSCAPE_INVERTED)
-        default 40 if LV_PREDEFINED_DISPLAY_TTGO && (LV_DISPLAY_ORIENTATION_PORTRAIT  || LV_DISPLAY_ORIENTATION_PORTRAIT_INVERTED)
+        default 53  if LV_PREDEFINED_DISPLAY_TTGO && (DISPLAY_ORIENTATION_LANDSCAPE || DISPLAY_ORIENTATION_LANDSCAPE_INVERTED)
+        default 40 if LV_PREDEFINED_DISPLAY_TTGO && (DISPLAY_ORIENTATION_PORTRAIT  || DISPLAY_ORIENTATION_PORTRAIT_INVERTED)
         default 0
 
 
@@ -353,10 +349,6 @@ menu "LVGL TFT Display controller"
             select LV_TFT_DISPLAY_CONTROLLER_PCD8544
             select LV_TFT_DISPLAY_PROTOCOL_SPI
             select LV_TFT_DISPLAY_MONOCHROME
-        config LV_TFT_DISPLAY_USER_CONTROLLER_SCHMITT
-            bool "SCHMITT"
-            select LV_TFT_DISPLAY_CONTROLLER_SCHMITT
-            select LV_TFT_DISPLAY_PROTOCOL_SPI
     endchoice
 
     config CUSTOM_DISPLAY_BUFFER_SIZE
@@ -477,14 +469,15 @@ menu "LVGL TFT Display controller"
 
     choice
         prompt "TFT SPI Bus." if LV_TFT_DISPLAY_PROTOCOL_SPI
-        default LV_TFT_DISPLAY_SPI2_HOST
-        help
-              Select the SPI Bus the TFT Display is attached to.
+        default LV_TFT_DISPLAY_SPI2_HOST if LV_PREDEFINED_DISPLAY_TTGO
+        default LV_TFT_DISPLAY_SPI3_HOST if !LV_PREDEFINED_DISPLAY_TTGO
 
         config LV_TFT_DISPLAY_SPI2_HOST
             bool "SPI2_HOST"
         config LV_TFT_DISPLAY_SPI3_HOST
-            bool "SPI3_HOST"
+            bool "SPI3_HOST" if !IDF_TARGET_ESP32C3
+        help
+              Select the SPI Bus the TFT Display is attached to.
     endchoice
 
     choice
@@ -914,6 +907,13 @@ menu "LVGL TFT Display controller"
             help
                 Configure the display Reset pin here.
 
+        config LV_DISP_USE_BUSY
+            bool "Use a GPIO for busy signal" if LV_TFT_DISPLAY_CONTROLLER_IL3820 || LV_TFT_DISPLAY_CONTROLLER_JD79653A || LV_TFT_DISPLAY_CONTROLLER_UC8151D
+            default y if LV_TFT_DISPLAY_CONTROLLER_IL3820 || LV_TFT_DISPLAY_CONTROLLER_JD79653A || LV_TFT_DISPLAY_CONTROLLER_UC8151D
+            default n
+            help
+                Use a GPIO for busy signal available in e-ink display controllers.
+
         config LV_DISP_PIN_BUSY
             int "GPIO for Busy" if LV_TFT_DISPLAY_CONTROLLER_IL3820 || LV_TFT_DISPLAY_CONTROLLER_JD79653A || LV_TFT_DISPLAY_CONTROLLER_UC8151D
             default 35 if LV_TFT_DISPLAY_CONTROLLER_IL3820 || LV_TFT_DISPLAY_CONTROLLER_JD79653A || LV_TFT_DISPLAY_CONTROLLER_UC8151D

lvgl_tft/disp_driver.c

@@ -7,16 +7,16 @@
 #include "esp_lcd_backlight.h"
 #include "sdkconfig.h"
 
-void *disp_driver_init(void)
+void *disp_driver_init(lv_disp_drv_t *drv)
 {
 #if defined CONFIG_LV_TFT_DISPLAY_CONTROLLER_ILI9341
-    ili9341_init();
+    ili9341_init(drv);
 #elif defined CONFIG_LV_TFT_DISPLAY_CONTROLLER_ILI9481
     ili9481_init();
 #elif defined CONFIG_LV_TFT_DISPLAY_CONTROLLER_ILI9488
-    ili9488_init();
+    ili9488_init(drv);
 #elif defined CONFIG_LV_TFT_DISPLAY_CONTROLLER_ST7789
-    st7789_init();
+    st7789_init(drv);
 #elif defined CONFIG_LV_TFT_DISPLAY_CONTROLLER_ST7796S
     st7796s_init();
 #elif defined CONFIG_LV_TFT_DISPLAY_CONTROLLER_ST7735S
@@ -44,11 +44,14 @@ void *disp_driver_init(void)
 #elif defined CONFIG_LV_TFT_DISPLAY_CONTROLLER_ILI9163C
     ili9163c_init();
 #elif defined CONFIG_LV_TFT_DISPLAY_CONTROLLER_PCD8544
-    pcd8544_init();
-#elif defined CONFIG_LV_TFT_DISPLAY_CONTROLLER_SCHMITT
-    schmitt_init();
+    pcd8544_init(drv);
 #endif
 
+    return disp_backlight_init();
+}
+
+void *disp_backlight_init(void)
+{
     // We still use menuconfig for these settings
     // It will be set up during runtime in the future
 #if (defined(CONFIG_LV_DISP_BACKLIGHT_SWITCH) || defined(CONFIG_LV_DISP_BACKLIGHT_PWM))
@@ -113,8 +116,6 @@ void disp_driver_flush(lv_disp_drv_t * drv, const lv_area_t * area, lv_color_t *
     ili9163c_flush(drv, area, color_map);
 #elif defined CONFIG_LV_TFT_DISPLAY_CONTROLLER_PCD8544
     pcd8544_flush(drv, area, color_map);
-#elif defined CONFIG_LV_TFT_DISPLAY_CONTROLLER_SCHMITT
-    schmitt_flush(drv, area, color_map);
 #endif
 }
 

lvgl_tft/disp_driver.h

@@ -54,8 +54,6 @@ extern "C" {
 #include "ili9163c.h"
 #elif defined CONFIG_LV_TFT_DISPLAY_CONTROLLER_PCD8544
 #include "pcd8544.h"
-#elif defined CONFIG_LV_TFT_DISPLAY_CONTROLLER_SCHMITT
-#include "schmitt.h"
 #endif
 
 /*********************
@@ -71,7 +69,7 @@ extern "C" {
  **********************/
 
 /* Initialize display */
-void *disp_driver_init(void);
+void *disp_driver_init(lv_disp_drv_t *drv);
 
 /* Display flush callback */
 void disp_driver_flush(lv_disp_drv_t * drv, const lv_area_t * area, lv_color_t * color_map);
@@ -83,6 +81,8 @@ void disp_driver_rounder(lv_disp_drv_t * disp_drv, lv_area_t * area);
 void disp_driver_set_px(lv_disp_drv_t * disp_drv, uint8_t * buf, lv_coord_t buf_w, lv_coord_t x, lv_coord_t y,
     lv_color_t color, lv_opa_t opa);
 
+/* Display backlight configuration */
+void *disp_backlight_init(void);
 /**********************
  *      MACROS
  **********************/

lvgl_tft/display_port.h

@@ -0,0 +1,95 @@
+#ifndef DISPLAY_PORT_H_
+#define DISPLAY_PORT_H_
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+#ifdef LV_LVGL_H_INCLUDE_SIMPLE
+#include "lvgl.h"
+#else
+#include "lvgl/lvgl.h"
+#endif
+
+#include <stdint.h>
+#include <stdbool.h>
+
+#define CMD_WITHOUT_ARGS    NULL
+
+enum {
+    CMD_WIDTH_8BITS,
+    CMD_WIDTH_16BITS,
+    CMD_WIDTH_INVALID,
+};
+
+typedef uint8_t cmd_width_t;
+
+/**
+ * Busy wait delay port
+ *
+ * @param drv Pointer to driver See @ref lv_disp_drv_t
+ * @param delay_ms Delay duration in milliseconds
+ */
+void display_port_delay(lv_disp_drv_t *drv, uint32_t delay_ms);
+
+/**
+ * Backlight control port
+ *
+ * @param drv Pointer to driver See @ref lv_disp_drv_t
+ * @param state State of the backlight signal
+ */
+void display_port_backlight(lv_disp_drv_t *drv, uint8_t state);
+
+/**
+ * DC signal control port
+ *
+ * @param drv Pointer to driver See @ref lv_disp_drv_t
+ * @param state State of the DC signal, 1 for logic high, 0 for logic low
+ */
+void display_port_gpio_dc(lv_disp_drv_t *drv, uint8_t state);
+
+/**
+ * Hardware reset control port
+ *
+ * @param drv Pointer to driver See @ref lv_disp_drv_t
+ * @param state State of the reset signal, 1 for logic high, 0 for logic low
+ */
+void display_port_gpio_rst(lv_disp_drv_t *drv, uint8_t state);
+
+/**
+ * Display is busy port
+ *
+ * @param drv Pointer to driver See @ref lv_disp_drv_t
+ *
+ * @retval Returns false when display is not busy, true otherwise.
+ */
+bool display_port_gpio_is_busy(lv_disp_drv_t *drv);
+
+/**
+ * Send cmd to display
+ *
+ * @param drv Pointer to driver
+ * @param cmd Command to send
+ * @param cmd_width Width of the command (in bits) to be sent, see @ref cmd_width_t
+ * @param args Pointer to arguments, use CMD_WITHOUT_ARGS to send command without arguments
+ * @param args_len Arguments length (in bytes) to be sent
+ */
+void display_interface_send_cmd(lv_disp_drv_t *drv, uint32_t cmd, cmd_width_t cmd_width, void *args, size_t args_len);
+
+/**
+ * Send (image) data to display
+ *
+ * User must call lv_disp_flush after the image is sent
+ *
+ * @param drv Pointer to driver
+ * @param data Pointer to data to be sent
+ * @param len Data length (in bytes) to be sent
+ */
+void display_interface_send_data(lv_disp_drv_t *drv, void *data, size_t len);
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#endif

lvgl_tft/hx8357.c

@@ -18,15 +18,12 @@
 #include "hx8357.h"
 #include "disp_spi.h"
 #include "driver/gpio.h"
-#include <esp_log.h>
 #include "freertos/FreeRTOS.h"
 #include "freertos/task.h"
 
 /*********************
  *      DEFINES
  *********************/
-#define TAG        "HX8357"
-
 #define MADCTL_MY  0x80 ///< Bottom to top
 #define MADCTL_MX  0x40 ///< Right to left
 #define MADCTL_MV  0x20 ///< Reverse Mode
@@ -52,7 +49,7 @@ typedef struct {
 static void hx8357_send_cmd(uint8_t cmd);
 static void hx8357_send_data(void * data, uint16_t length);
 static void hx8357_send_color(void * data, uint16_t length);
-
+static void hx8357_reset(void);
 
 /**********************
  *  INITIALIZATION ARRAYS
@@ -159,22 +156,9 @@ static uint8_t displayType = HX8357D;
 
 void hx8357_init(void)
 {
-	//Initialize non-SPI GPIOs
-    gpio_pad_select_gpio(HX8357_DC);
-	gpio_set_direction(HX8357_DC, GPIO_MODE_OUTPUT);
+    hx8357_reset();
 
-#if HX8357_USE_RST
-    gpio_pad_select_gpio(HX8357_RST);
-	gpio_set_direction(HX8357_RST, GPIO_MODE_OUTPUT);
-
-	//Reset the display
-	gpio_set_level(HX8357_RST, 0);
-	vTaskDelay(10 / portTICK_RATE_MS);
-	gpio_set_level(HX8357_RST, 1);
-	vTaskDelay(120 / portTICK_RATE_MS);
-#endif
-
-	ESP_LOGI(TAG, "Initialization.");
+    LV_LOG_INFO("Initialization.");
 
     //Send all the commands
     const uint8_t *addr = (displayType == HX8357B) ? initb : initd;
@@ -289,3 +273,13 @@ static void hx8357_send_color(void * data, uint16_t length)
 	gpio_set_level(HX8357_DC, 1);   /*Data mode*/
 	disp_spi_send_colors(data, length);
 }
+
+static void hx8357_reset(void)
+{
+#if HX8357_USE_RST
+    gpio_set_level(HX8357_RST, 0);
+    vTaskDelay(10 / portTICK_RATE_MS);
+    gpio_set_level(HX8357_RST, 1);
+    vTaskDelay(120 / portTICK_RATE_MS);
+#endif
+}

lvgl_tft/il3820.c

@@ -30,7 +30,6 @@ TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR TH
  *********************/
 #include "disp_spi.h"
 #include "driver/gpio.h"
-#include "esp_log.h"
 #include "freertos/FreeRTOS.h"
 #include "freertos/task.h"
 
@@ -39,7 +38,6 @@ TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR TH
 /*********************
  *      DEFINES
  *********************/
- #define TAG "IL3820"
 
 /**
  * SSD1673, SSD1608 compatible EPD controller driver.
@@ -102,6 +100,7 @@ static inline void il3820_set_window( uint16_t sx, uint16_t ex, uint16_t ys, uin
 static inline void il3820_set_cursor(uint16_t sx, uint16_t ys);
 static void il3820_update_display(void);
 static void il3820_clear_cntlr_mem(uint8_t ram_cmd, bool update);
+static void il3820_reset(void);
 
 /* Required by LVGL */
 void il3820_flush(lv_disp_drv_t *drv, const lv_area_t *area, lv_color_t *color_map)
@@ -180,7 +179,9 @@ void il3820_set_px_cb(lv_disp_drv_t * disp_drv, uint8_t* buf,
         BIT_CLEAR(buf[byte_index], 7 - bit_index);
     }
 #else
-#error "Unsupported orientation used"
+    (void)byte_index;
+    (void)bit_index;
+    assert(false); // Unsupported orientation configured. Crash if we get here, but allow compilation for CI
 #endif
 }
 
@@ -195,26 +196,7 @@ void il3820_init(void)
 {
     uint8_t tmp[3] = {0};
 
-    /* Initialize non-SPI GPIOs */
-    gpio_pad_select_gpio(IL3820_DC_PIN);
-    gpio_set_direction(IL3820_DC_PIN, GPIO_MODE_OUTPUT);
-
-    gpio_pad_select_gpio(IL3820_BUSY_PIN);
-    gpio_set_direction(IL3820_BUSY_PIN,  GPIO_MODE_INPUT);
-
-#if IL3820_USE_RST
-    gpio_pad_select_gpio(IL3820_RST_PIN);
-    gpio_set_direction(IL3820_RST_PIN, GPIO_MODE_OUTPUT);
-
-    /* Harware reset */
-    gpio_set_level( IL3820_RST_PIN, 0);
-    vTaskDelay(IL3820_RESET_DELAY / portTICK_RATE_MS);
-    gpio_set_level( IL3820_RST_PIN, 1);
-    vTaskDelay(IL3820_RESET_DELAY / portTICK_RATE_MS);
-#endif
-
-    /* Software reset */
-    il3820_write_cmd(IL3820_CMD_SW_RESET, NULL, 0);
+    il3820_reset();
 
     /* Busy wait for the BUSY signal to go low */
     il3820_waitbusy(IL3820_WAIT);
@@ -277,7 +259,7 @@ static void il3820_waitbusy(int wait_ms)
         vTaskDelay(10 / portTICK_RATE_MS);
     }
 
-    ESP_LOGE( TAG, "busy exceeded %dms", i*10 );
+    LV_LOG_ERROR("Busy exceeded %dms", i*10 );
 }
 
 /* Set DC signal to command mode */
@@ -416,3 +398,17 @@ static void il3820_clear_cntlr_mem(uint8_t ram_cmd, bool update)
 	il3820_update_display();
     }
 }
+
+static void il3820_reset(void)
+{
+#if IL3820_USE_RST
+    /* Harware reset */
+    gpio_set_level( IL3820_RST_PIN, 0);
+    vTaskDelay(IL3820_RESET_DELAY / portTICK_RATE_MS);
+    gpio_set_level( IL3820_RST_PIN, 1);
+    vTaskDelay(IL3820_RESET_DELAY / portTICK_RATE_MS);
+#endif
+
+    /* Software reset */
+    il3820_write_cmd(IL3820_CMD_SW_RESET, NULL, 0);
+}

lvgl_tft/il3820.h

@@ -20,8 +20,19 @@ extern "C"
 
 /* Values for Waveshare 2.9inch e-Paper Module, this values shouldn't be
  * swapped to change display orientation */
+#if defined (LV_HOR_RES_MAX)
 #define EPD_PANEL_WIDTH         LV_HOR_RES_MAX   /* 128 */
+#else
+    /* Fallback to default value */
+#define EPD_PANEL_WIDTH         128u
+#endif
+
+#if defined (LV_VER_RES_MAX)
 #define EPD_PANEL_HEIGHT        LV_VER_RES_MAX  /* 296 */
+#else
+    /* Fallback to default value */
+#define EPD_PANEL_HEIGHT        296u
+#endif
 
 /* 128 = panel width */
 #define IL3820_COLUMNS          (EPD_PANEL_WIDTH / 8)

lvgl_tft/ili9163c.c

@@ -9,7 +9,6 @@
 #include "ili9163c.h"
 #include "disp_spi.h"
 #include "driver/gpio.h"
-#include "esp_log.h"
 #include "freertos/FreeRTOS.h"
 #include "freertos/task.h"
 #include "assert.h"
@@ -17,8 +16,6 @@
 /*********************
  *      DEFINES
  *********************/
-#define TAG "ILI9163C"
-
 // ILI9163C specific commands used in init
 #define ILI9163C_NOP 0x00
 #define ILI9163C_SWRESET 0x01
@@ -69,7 +66,7 @@
 
 #define ST77XX_MADCTL_MY 0x80
 #define ST77XX_MADCTL_MX 0x40
-#define ST77XX_MADCTL_MV 0x20 #define
+#define ST77XX_MADCTL_MV 0x20
 #define ST77XX_MADCTL_ML 0x10
 #define ST77XX_MADCTL_RGB 0x00
 #define ST77XX_MADCTL_BGR 0x08
@@ -94,7 +91,7 @@ static void ili9163c_set_orientation(uint8_t orientation);
 static void ili9163c_send_cmd(uint8_t cmd);
 static void ili9163c_send_data(void *data, uint16_t length);
 static void ili9163c_send_color(void *data, uint16_t length);
-
+static void ili9163c_reset(void);
 /**********************
  *  STATIC VARIABLES
  **********************/
@@ -109,7 +106,7 @@ static void ili9163c_send_color(void *data, uint16_t length);
 
 void ili9163c_init(void)
 {
-	ESP_LOGD(TAG, "Init");
+	LV_LOG_INFO("Init");
 
 	lcd_init_cmd_t ili_init_cmds[] = {
 		{ILI9163C_SWRESET, {0}, 0x80},		 // Software reset, 0 args, w/delay 120ms
@@ -137,17 +134,7 @@ void ili9163c_init(void)
 		{0, {0}, 0xff}
 	};
  
-	//Initialize non-SPI GPIOs
-	gpio_pad_select_gpio(ILI9163C_DC);
-	gpio_set_direction(ILI9163C_DC, GPIO_MODE_OUTPUT);
-	gpio_pad_select_gpio(ILI9163C_RST);
-	gpio_set_direction(ILI9163C_RST, GPIO_MODE_OUTPUT);
-
-	//Reset the display
-	gpio_set_level(ILI9163C_RST, 0);
-	vTaskDelay(100 / portTICK_RATE_MS);
-	gpio_set_level(ILI9163C_RST, 1);
-	vTaskDelay(150 / portTICK_RATE_MS);
+        ili9163c_reset();
 
 	//Send all the commands
 	uint16_t cmd = 0;
@@ -236,13 +223,25 @@ static void ili9163c_set_orientation(uint8_t orientation)
 {
 	assert(orientation < 4);
 
+#if (LV_USE_LOG == 1)
 	const char *orientation_str[] = {
 		"PORTRAIT", "PORTRAIT_INVERTED", "LANDSCAPE", "LANDSCAPE_INVERTED"};
 
-	ESP_LOGD(TAG, "Display orientation: %s", orientation_str[orientation]);
-
+	LV_LOG_INFO("Display orientation: %s", orientation_str[orientation]);
+#endif
 	uint8_t data[] = {0x48, 0x88, 0xA8, 0x68};
 
 	ili9163c_send_cmd(ILI9163C_MADCTL);
 	ili9163c_send_data((void *)&data[orientation], 1);
 }
+
+static void ili9163c_reset(void)
+{
+#if CONFIG_LV_DISP_USE_RST
+    gpio_set_level(ILI9163C_RST, 0);
+    vTaskDelay(100 / portTICK_RATE_MS);
+    gpio_set_level(ILI9163C_RST, 1);
+    vTaskDelay(150 / portTICK_RATE_MS);
+#else
+#endif
+}

lvgl_tft/ili9341.c

@@ -7,22 +7,24 @@
  *      INCLUDES
  *********************/
 #include "ili9341.h"
+
 #include "disp_spi.h"
-#include "driver/gpio.h"
-#include "esp_log.h"
-#include "freertos/FreeRTOS.h"
-#include "freertos/task.h"
+#include "display_port.h"
 
 /*********************
  *      DEFINES
  *********************/
- #define TAG "ILI9341"
+#define END_OF_CMD_MARKER           0xFFU
+
+#define MEMORY_ACCESS_CONTROL_REG   0x36U
+#define SOFTWARE_RESET_REG          0x01U
 
 /**********************
  *      TYPEDEFS
  **********************/
 
 /*The LCD needs a bunch of command/argument values to be initialized. They are stored in this struct. */
+
 typedef struct {
     uint8_t cmd;
     uint8_t data[16];
@@ -32,12 +34,13 @@ typedef struct {
 /**********************
  *  STATIC PROTOTYPES
  **********************/
-static void ili9341_set_orientation(uint8_t orientation);
+static void ili9341_set_orientation(lv_disp_drv_t * drv, uint8_t orientation);
 
-static void ili9341_send_cmd(uint8_t cmd);
-static void ili9341_send_data(void * data, uint16_t length);
-static void ili9341_send_color(void * data, uint16_t length);
+static void ili9341_send_cmd(lv_disp_drv_t * drv, uint8_t cmd);
+static void ili9341_send_data(lv_disp_drv_t * drv, void * data, uint16_t length);
+static void ili9341_send_color(lv_disp_drv_t * drv, void * data, uint16_t length);
 
+static void ili9341_reset(lv_disp_drv_t * drv);
 /**********************
  *  STATIC VARIABLES
  **********************/
@@ -50,21 +53,27 @@ static void ili9341_send_color(void * data, uint16_t length);
  *   GLOBAL FUNCTIONS
  **********************/
 
-void ili9341_init(void)
+void ili9341_init(lv_disp_drv_t * drv)
 {
-	lcd_init_cmd_t ili_init_cmds[]={
+    lcd_init_cmd_t ili_init_cmds[] = {
         {0xCF, {0x00, 0x83, 0X30}, 3},
         {0xED, {0x64, 0x03, 0X12, 0X81}, 4},
         {0xE8, {0x85, 0x01, 0x79}, 3},
         {0xCB, {0x39, 0x2C, 0x00, 0x34, 0x02}, 5},
         {0xF7, {0x20}, 1},
         {0xEA, {0x00, 0x00}, 2},
-		{0xC0, {0x26}, 1},          /*Power control*/
-		{0xC1, {0x11}, 1},          /*Power control */
-		{0xC5, {0x35, 0x3E}, 2},    /*VCOM control*/
-		{0xC7, {0xBE}, 1},          /*VCOM control*/
-		{0x36, {0x28}, 1},          /*Memory Access Control*/
-		{0x3A, {0x55}, 1},			/*Pixel Format Set*/
+        /* Power control */
+        {0xC0, {0x26}, 1},
+        /* Power control */
+        {0xC1, {0x11}, 1},
+        /* VCOM control */
+        {0xC5, {0x35, 0x3E}, 2},
+        /* VCOM control */
+        {0xC7, {0xBE}, 1},
+        /* Memory Access Control */
+        {0x36, {0x28}, 1},
+        /* Pixel Format Set */
+        {0x3A, {0x55}, 1},
         {0xB1, {0x00, 0x1B}, 2},
         {0xF2, {0x08}, 1},
         {0x26, {0x01}, 1},
@@ -77,135 +86,139 @@ void ili9341_init(void)
         {0xB6, {0x0A, 0x82, 0x27, 0x00}, 4},
         {0x11, {0}, 0x80},
         {0x29, {0}, 0x80},
-		{0, {0}, 0xff},
+        {0, {0}, END_OF_CMD_MARKER},
     };
 
-	//Initialize non-SPI GPIOs
-    gpio_pad_select_gpio(ILI9341_DC);
-	gpio_set_direction(ILI9341_DC, GPIO_MODE_OUTPUT);
-
-#if ILI9341_USE_RST
-    gpio_pad_select_gpio(ILI9341_RST);
-	gpio_set_direction(ILI9341_RST, GPIO_MODE_OUTPUT);
-
-	//Reset the display
-	gpio_set_level(ILI9341_RST, 0);
-	vTaskDelay(100 / portTICK_RATE_MS);
-	gpio_set_level(ILI9341_RST, 1);
-	vTaskDelay(100 / portTICK_RATE_MS);
-#endif
-
-	ESP_LOGI(TAG, "Initialization.");
+    ili9341_reset(drv);
 
     //Send all the commands
     uint16_t cmd = 0;
-	while (ili_init_cmds[cmd].databytes!=0xff) {
-		ili9341_send_cmd(ili_init_cmds[cmd].cmd);
-		ili9341_send_data(ili_init_cmds[cmd].data, ili_init_cmds[cmd].databytes&0x1F);
+    while (ili_init_cmds[cmd].databytes != END_OF_CMD_MARKER) {
+        ili9341_send_cmd(drv, ili_init_cmds[cmd].cmd);
+        ili9341_send_data(drv, ili_init_cmds[cmd].data, ili_init_cmds[cmd].databytes & 0x1F);
+        
         if (ili_init_cmds[cmd].databytes & 0x80) {
-			vTaskDelay(100 / portTICK_RATE_MS);
+            display_port_delay(drv, 100);
         }
+
         cmd++;
     }
 
-    ili9341_set_orientation(CONFIG_LV_DISPLAY_ORIENTATION);
+    ili9341_set_orientation(drv, ILI9341_INITIAL_ORIENTATION);
 
-#if ILI9341_INVERT_COLORS == 1
-	ili9341_send_cmd(0x21);
+#if ILI9341_INVERT_COLORS == 1U
+    ili9341_send_cmd(drv, 0x21);
 #else
-	ili9341_send_cmd(0x20);
+    ili9341_send_cmd(drv, 0x20);
 #endif
 }
 
 
 void ili9341_flush(lv_disp_drv_t * drv, const lv_area_t * area, lv_color_t * color_map)
 {
-	uint8_t data[4];
+    uint8_t data[4] = {0};
+    uint32_t size = lv_area_get_width(area) * lv_area_get_height(area);
 
     /*Column addresses*/
-	ili9341_send_cmd(0x2A);
     data[0] = (area->x1 >> 8) & 0xFF;
     data[1] = area->x1 & 0xFF;
     data[2] = (area->x2 >> 8) & 0xFF;
     data[3] = area->x2 & 0xFF;
-	ili9341_send_data(data, 4);
 
-	/*Page addresses*/
-	ili9341_send_cmd(0x2B);
+    ili9341_send_cmd(drv, 0x2A);
+    ili9341_send_data(drv, data, 4);
+
+    /* Page addresses */
     data[0] = (area->y1 >> 8) & 0xFF;
     data[1] = area->y1 & 0xFF;
     data[2] = (area->y2 >> 8) & 0xFF;
     data[3] = area->y2 & 0xFF;
-	ili9341_send_data(data, 4);
 
-	/*Memory write*/
-	ili9341_send_cmd(0x2C);
-	uint32_t size = lv_area_get_width(area) * lv_area_get_height(area);
-	ili9341_send_color((void*)color_map, size * 2);
+    ili9341_send_cmd(drv, 0x2B);
+    ili9341_send_data(drv, data, 4);
+
+    /* Memory write */
+    ili9341_send_cmd(drv, 0x2C);
+    ili9341_send_color(drv, (void*)color_map, size * 2);
 }
 
-void ili9341_sleep_in()
+void ili9341_sleep_in(lv_disp_drv_t * drv)
 {
     uint8_t data[] = {0x08};
-	ili9341_send_cmd(0x10);
-	ili9341_send_data(&data, 1);
+    ili9341_send_cmd(drv, 0x10);
+    ili9341_send_data(drv, data, 1);
 }
 
-void ili9341_sleep_out()
+void ili9341_sleep_out(lv_disp_drv_t * drv)
 {
     uint8_t data[] = {0x08};
-	ili9341_send_cmd(0x11);
-	ili9341_send_data(&data, 1);
+    ili9341_send_cmd(drv, 0x11);
+    ili9341_send_data(drv, data, 1);
 }
 
 /**********************
  *   STATIC FUNCTIONS
  **********************/
 
+static inline void set_cmd_mode(lv_disp_drv_t * drv)
+{
+    display_port_gpio_dc(drv, 0);
+}
 
-static void ili9341_send_cmd(uint8_t cmd)
+static inline void set_data_mode(lv_disp_drv_t * drv)
+{
+    display_port_gpio_dc(drv, 1);
+}
+
+static void ili9341_send_cmd(lv_disp_drv_t * drv, uint8_t cmd)
 {
     disp_wait_for_pending_transactions();
-    gpio_set_level(ILI9341_DC, 0);	 /*Command mode*/
+    set_cmd_mode(drv);
     disp_spi_send_data(&cmd, 1);
 }
 
-static void ili9341_send_data(void * data, uint16_t length)
+static void ili9341_send_data(lv_disp_drv_t *drv, void * data, uint16_t length)
 {
     disp_wait_for_pending_transactions();
-    gpio_set_level(ILI9341_DC, 1);	 /*Data mode*/
+    set_data_mode(drv);
     disp_spi_send_data(data, length);
 }
 
-static void ili9341_send_color(void * data, uint16_t length)
+static void ili9341_send_color(lv_disp_drv_t *drv, void * data, uint16_t length)
 {
     disp_wait_for_pending_transactions();
-    gpio_set_level(ILI9341_DC, 1);   /*Data mode*/
+    set_data_mode(drv);
     disp_spi_send_colors(data, length);
 }
 
-static void ili9341_set_orientation(uint8_t orientation)
+static void ili9341_set_orientation(lv_disp_drv_t *drv, uint8_t orientation)
 {
-    // ESP_ASSERT(orientation < 4);
-
-    const char *orientation_str[] = {
-        "PORTRAIT", "PORTRAIT_INVERTED", "LANDSCAPE", "LANDSCAPE_INVERTED"
-    };
-
-    ESP_LOGI(TAG, "Display orientation: %s", orientation_str[orientation]);
+    assert(orientation < 4);
 
 #if defined CONFIG_LV_PREDEFINED_DISPLAY_M5STACK
-    uint8_t data[] = {0x68, 0x68, 0x08, 0x08};
+    const uint8_t data[] = {0x68, 0x68, 0x08, 0x08};
 #elif defined (CONFIG_LV_PREDEFINED_DISPLAY_M5CORE2)
-	uint8_t data[] = {0x08, 0x88, 0x28, 0xE8};
+	const uint8_t data[] = {0x08, 0x88, 0x28, 0xE8};
 #elif defined (CONFIG_LV_PREDEFINED_DISPLAY_WROVER4)
-    uint8_t data[] = {0x6C, 0xEC, 0xCC, 0x4C};
-#elif defined (CONFIG_LV_PREDEFINED_DISPLAY_NONE)
-    uint8_t data[] = {0x48, 0x88, 0x28, 0xE8};
+    const uint8_t data[] = {0x6C, 0xEC, 0xCC, 0x4C};
+#else
+    const uint8_t data[] = {0x48, 0x88, 0x28, 0xE8};
 #endif
 
-    ESP_LOGI(TAG, "0x36 command value: 0x%02X", data[orientation]);
-
-    ili9341_send_cmd(0x36);
-    ili9341_send_data((void *) &data[orientation], 1);
+    ili9341_send_cmd(drv, MEMORY_ACCESS_CONTROL_REG);
+    ili9341_send_data(drv, (void *) &data[orientation], 1);
+}
+
+/* Reset the display, if we don't have a reset pin we use software reset */
+static void ili9341_reset(lv_disp_drv_t *drv)
+{
+#if defined(ILI9341_USE_RST)
+    display_port_gpio_rst(drv, 0);
+    display_port_delay(drv, 100);
+    display_port_gpio_rst(drv, 1);
+    display_port_delay(drv, 100);
+#else
+    ili9341_send_cmd(drv, SOFTWARE_RESET_REG);
+    display_port_delay(drv, 5);
+#endif
 }

lvgl_tft/ili9341.h

@@ -13,23 +13,17 @@ extern "C" {
 /*********************
  *      INCLUDES
  *********************/
-#include <stdbool.h>
-
 #ifdef LV_LVGL_H_INCLUDE_SIMPLE
 #include "lvgl.h"
 #else
 #include "lvgl/lvgl.h"
 #endif
 
-#include "sdkconfig.h"
+#include "display_config.h"
 
 /*********************
  *      DEFINES
  *********************/
-#define ILI9341_DC        CONFIG_LV_DISP_PIN_DC
-#define ILI9341_USE_RST   CONFIG_LV_DISP_USE_RST
-#define ILI9341_RST       CONFIG_LV_DISP_PIN_RST
-#define ILI9341_INVERT_COLORS CONFIG_LV_INVERT_COLORS
 
 /**********************
  *      TYPEDEFS
@@ -39,10 +33,10 @@ extern "C" {
  * GLOBAL PROTOTYPES
  **********************/
 
-void ili9341_init(void);
+void ili9341_init(lv_disp_drv_t * drv);
 void ili9341_flush(lv_disp_drv_t * drv, const lv_area_t * area, lv_color_t * color_map);
-void ili9341_sleep_in(void);
-void ili9341_sleep_out(void);
+void ili9341_sleep_in(lv_disp_drv_t * drv);
+void ili9341_sleep_out(lv_disp_drv_t *drv);
 
 /**********************
  *      MACROS

lvgl_tft/ili9481.c

@@ -8,16 +8,13 @@
 #include "ili9481.h"
 #include "disp_spi.h"
 #include "driver/gpio.h"
-#include "esp_log.h"
 #include "esp_heap_caps.h"
-
 #include "freertos/FreeRTOS.h"
 #include "freertos/task.h"
 
 /*********************
  *      DEFINES
  *********************/
- #define TAG "ILI9481"
 
 /**********************
  *      TYPEDEFS
@@ -38,6 +35,7 @@ static void ili9481_set_orientation(uint8_t orientation);
 static void ili9481_send_cmd(uint8_t cmd);
 static void ili9481_send_data(void * data, uint16_t length);
 static void ili9481_send_color(void * data, uint16_t length);
+static void ili9481_reset(void);
 
 /**********************
  *  STATIC VARIABLES
@@ -73,26 +71,9 @@ void ili9481_init(void)
         {0, {0}, 0xff},
     };
 
-    //Initialize non-SPI GPIOs
-    gpio_pad_select_gpio(ILI9481_DC);
-    gpio_set_direction(ILI9481_DC, GPIO_MODE_OUTPUT);
+    ili9481_reset();
 
-#if ILI9481_USE_RST
-    gpio_pad_select_gpio(ILI9481_RST);
-    gpio_set_direction(ILI9481_RST, GPIO_MODE_OUTPUT);
-
-    //Reset the display
-    gpio_set_level(ILI9481_RST, 0);
-    vTaskDelay(100 / portTICK_RATE_MS);
-    gpio_set_level(ILI9481_RST, 1);
-    vTaskDelay(100 / portTICK_RATE_MS);
-#endif
-
-    ESP_LOGI(TAG, "ILI9481 initialization.");
-
-    // Exit sleep
-    ili9481_send_cmd(0x01);	/* Software reset */
-    vTaskDelay(100 / portTICK_RATE_MS);
+    LV_LOG_INFO("Initialization.");
 
     //Send all the commands
     uint16_t cmd = 0;
@@ -111,13 +92,16 @@ void ili9481_init(void)
 // Flush function based on mvturnho repo
 void ili9481_flush(lv_disp_drv_t * drv, const lv_area_t * area, lv_color_t * color_map)
 {
-    uint32_t size = lv_area_get_width(area) * lv_area_get_height(area);
+    /* 3 is number of bytes in lv_color_t */
+    uint32_t size = lv_area_get_width(area) * lv_area_get_height(area) * 3;
 
     lv_color16_t *buffer_16bit = (lv_color16_t *) color_map;
     uint8_t *mybuf;
     do {
         mybuf = (uint8_t *) heap_caps_malloc(3 * size * sizeof(uint8_t), MALLOC_CAP_DMA);
-        if (mybuf == NULL)  ESP_LOGW(TAG, "Could not allocate enough DMA memory!");
+        if (mybuf == NULL)  {
+            LV_LOG_WARN("Could not allocate enough DMA memory!");
+        }
     } while (mybuf == NULL);
 
     uint32_t LD = 0;
@@ -160,7 +144,9 @@ void ili9481_flush(lv_disp_drv_t * drv, const lv_area_t * area, lv_color_t * col
     /*Memory write*/
     ili9481_send_cmd(ILI9481_CMD_MEMORY_WRITE);
 
-    ili9481_send_color((void *) mybuf, size * 3);
+    ili9481_send_color((void *) mybuf, size);
+
+    /* FIXME: Can we free the memory even when it's being transferred? */
     heap_caps_free(mybuf);
 }
 
@@ -192,13 +178,29 @@ static void ili9481_send_color(void * data, uint16_t length)
 
 static void ili9481_set_orientation(uint8_t orientation)
 {
+#if (LV_USE_LOG == 1)
     const char *orientation_str[] = {
         "PORTRAIT", "PORTRAIT_INVERTED", "LANDSCAPE", "LANDSCAPE_INVERTED"
     };
 
-    ESP_LOGI(TAG, "Display orientation: %s", orientation_str[orientation]);
+    LV_LOG_INFO("Display orientation: %s", orientation_str[orientation]);
+#endif
 
     uint8_t data[] = {0x48, 0x4B, 0x28, 0x2B};
     ili9481_send_cmd(ILI9481_CMD_MEMORY_ACCESS_CONTROL);
     ili9481_send_data((void *) &data[orientation], 1);
 }
+
+static void ili9481_reset(void)
+{
+#if ILI9481_USE_RST
+    gpio_set_level(ILI9481_RST, 0);
+    vTaskDelay(100 / portTICK_RATE_MS);
+    gpio_set_level(ILI9481_RST, 1);
+    vTaskDelay(100 / portTICK_RATE_MS);
+#else
+    // Exit sleep, software reset
+    ili9481_send_cmd(0x01);
+    vTaskDelay(100 / portTICK_RATE_MS);
+#endif
+}

lvgl_tft/ili9486.c

@@ -9,14 +9,12 @@
 #include "ili9486.h"
 #include "disp_spi.h"
 #include "driver/gpio.h"
-#include "esp_log.h"
 #include "freertos/FreeRTOS.h"
 #include "freertos/task.h"
 
 /*********************
  *      DEFINES
  *********************/
- #define TAG "ILI9486"
 
 /**********************
  *      TYPEDEFS
@@ -37,7 +35,7 @@ static void ili9486_set_orientation(uint8_t orientation);
 static void ili9486_send_cmd(uint8_t cmd);
 static void ili9486_send_data(void * data, uint16_t length);
 static void ili9486_send_color(void * data, uint16_t length);
-
+static void ili9486_reset(void);
 /**********************
  *  STATIC VARIABLES
  **********************/
@@ -65,22 +63,9 @@ void ili9486_init(void)
         {0x00, {0}, 0xff},
     };
 
-	//Initialize non-SPI GPIOs
-    gpio_pad_select_gpio(ILI9486_DC);
-	gpio_set_direction(ILI9486_DC, GPIO_MODE_OUTPUT);
+    ili9486_reset();
 
-#if ILI9486_USE_RST
-    gpio_pad_select_gpio(ILI9486_RST);
-	gpio_set_direction(ILI9486_RST, GPIO_MODE_OUTPUT);
-
-	//Reset the display
-	gpio_set_level(ILI9486_RST, 0);
-	vTaskDelay(100 / portTICK_RATE_MS);
-	gpio_set_level(ILI9486_RST, 1);
-	vTaskDelay(100 / portTICK_RATE_MS);
-#endif
-
-	ESP_LOGI(TAG, "ILI9486 Initialization.");
+    LV_LOG_INFO("ILI9486 Initialization.");
 
     //Send all the commands
     uint16_t cmd = 0;
@@ -99,7 +84,8 @@ void ili9486_init(void)
 void ili9486_flush(lv_disp_drv_t * drv, const lv_area_t * area, lv_color_t * color_map)
 {
     uint8_t data[4] = {0};
-    uint32_t size = 0;
+    /* 2 is the number of bytes in color depth */
+    uint32_t size = lv_area_get_width(area) * lv_area_get_height(area) * 2;
 
     /*Column addresses*/
     ili9486_send_cmd(0x2A);
@@ -119,10 +105,7 @@ void ili9486_flush(lv_disp_drv_t * drv, const lv_area_t * area, lv_color_t * col
 
     /*Memory write*/
     ili9486_send_cmd(0x2C);
-
-	size = lv_area_get_width(area) * lv_area_get_height(area);
-
-    ili9486_send_color((void*) color_map, size * 2);
+    ili9486_send_color((void*) color_map, size);
 }
 
 /**********************
@@ -165,20 +148,29 @@ static void ili9486_send_color(void * data, uint16_t length)
 
 static void ili9486_set_orientation(uint8_t orientation)
 {
-    // ESP_ASSERT(orientation < 4);
+    assert(orientation < 4);
 
+    const uint8_t data[] = {0x48, 0x88, 0x28, 0xE8};
+
+#if (LV_USE_LOG == 1)
     const char *orientation_str[] = {
         "PORTRAIT", "PORTRAIT_INVERTED", "LANDSCAPE", "LANDSCAPE_INVERTED"
     };
 
-    ESP_LOGI(TAG, "Display orientation: %s", orientation_str[orientation]);
-
-#if defined (CONFIG_LV_PREDEFINED_DISPLAY_NONE)
-    uint8_t data[] = {0x48, 0x88, 0x28, 0xE8};
+    LV_LOG_INFO("Display orientation: %s", orientation_str[orientation]);
+    LV_LOG_INFO("0x36 command value: 0x%02X", data[orientation]);
 #endif
 
-    ESP_LOGI(TAG, "0x36 command value: 0x%02X", data[orientation]);
-
     ili9486_send_cmd(0x36);
     ili9486_send_data((void *) &data[orientation], 1);
 }
+
+static void ili9486_reset(void)
+{
+#if ILI9486_USE_RST
+    gpio_set_level(ILI9486_RST, 0);
+    vTaskDelay(100 / portTICK_RATE_MS);
+    gpio_set_level(ILI9486_RST, 1);
+    vTaskDelay(100 / portTICK_RATE_MS);
+#endif
+}

lvgl_tft/ili9488.c

@@ -6,18 +6,14 @@
  *      INCLUDES
  *********************/
 #include "ili9488.h"
-#include "disp_spi.h"
-#include "driver/gpio.h"
-#include "esp_log.h"
-#include "esp_heap_caps.h"
 
-#include "freertos/FreeRTOS.h"
-#include "freertos/task.h"
+#include "disp_spi.h"
+#include "display_port.h"
+#include "esp_heap_caps.h"
 
 /*********************
  *      DEFINES
  *********************/
- #define TAG "ILI9488"
 
 /**********************
  *      TYPEDEFS
@@ -33,11 +29,12 @@ typedef struct {
 /**********************
  *  STATIC PROTOTYPES
  **********************/
-static void ili9488_set_orientation(uint8_t orientation);
+static void ili9488_set_orientation(lv_disp_drv_t * drv, uint8_t orientation);
 
-static void ili9488_send_cmd(uint8_t cmd);
-static void ili9488_send_data(void * data, uint16_t length);
-static void ili9488_send_color(void * data, uint16_t length);
+static void ili9488_send_cmd(lv_disp_drv_t * drv, uint8_t cmd);
+static void ili9488_send_data(lv_disp_drv_t * drv, void * data, uint16_t length);
+static void ili9488_send_color(lv_disp_drv_t * drv, void * data, uint16_t length);
+static void ili9488_reset(lv_disp_drv_t * drv);
 
 /**********************
  *  STATIC VARIABLES
@@ -52,7 +49,7 @@ static void ili9488_send_color(void * data, uint16_t length);
  **********************/
 // From github.com/jeremyjh/ESP32_TFT_library
 // From github.com/mvturnho/ILI9488-lvgl-ESP32-WROVER-B
-void ili9488_init(void)
+void ili9488_init(lv_disp_drv_t * drv)
 {
     lcd_init_cmd_t ili_init_cmds[]={
         {ILI9488_CMD_SLEEP_OUT, {0x00}, 0x80},
@@ -75,39 +72,24 @@ void ili9488_init(void)
         {0, {0}, 0xff},
     };
 
-	//Initialize non-SPI GPIOs
-    gpio_pad_select_gpio(ILI9488_DC);
-	gpio_set_direction(ILI9488_DC, GPIO_MODE_OUTPUT);
+    ili9488_reset(drv);
 
-#if ILI9488_USE_RST
-    gpio_pad_select_gpio(ILI9488_RST);
-	gpio_set_direction(ILI9488_RST, GPIO_MODE_OUTPUT);
-
-	//Reset the display
-	gpio_set_level(ILI9488_RST, 0);
-	vTaskDelay(100 / portTICK_RATE_MS);
-	gpio_set_level(ILI9488_RST, 1);
-	vTaskDelay(100 / portTICK_RATE_MS);
-#endif
-
-	ESP_LOGI(TAG, "ILI9488 initialization.");
-
-	// Exit sleep
-	ili9488_send_cmd(0x01);	/* Software reset */
-	vTaskDelay(100 / portTICK_RATE_MS);
+    LV_LOG_INFO("ILI9488 initialization.");
 
     //Send all the commands
     uint16_t cmd = 0;
     while (ili_init_cmds[cmd].databytes!=0xff) {
-		ili9488_send_cmd(ili_init_cmds[cmd].cmd);
-		ili9488_send_data(ili_init_cmds[cmd].data, ili_init_cmds[cmd].databytes&0x1F);
+        ili9488_send_cmd(drv, ili_init_cmds[cmd].cmd);
+        ili9488_send_data(drv, ili_init_cmds[cmd].data, ili_init_cmds[cmd].databytes&0x1F);
+        
         if (ili_init_cmds[cmd].databytes & 0x80) {
-			vTaskDelay(100 / portTICK_RATE_MS);
+            display_port_delay(drv, 100);
         }
+
         cmd++;
     }
 
-    ili9488_set_orientation(CONFIG_LV_DISPLAY_ORIENTATION);
+    ili9488_set_orientation(drv, ILI9488_INITIAL_ORIENTATION);
 }
 
 // Flush function based on mvturnho repo
@@ -119,7 +101,9 @@ void ili9488_flush(lv_disp_drv_t * drv, const lv_area_t * area, lv_color_t * col
     uint8_t *mybuf;
     do {
         mybuf = (uint8_t *) heap_caps_malloc(3 * size * sizeof(uint8_t), MALLOC_CAP_DMA);
-        if (mybuf == NULL)  ESP_LOGW(TAG, "Could not allocate enough DMA memory!");
+        if (mybuf == NULL) {
+            LV_LOG_WARN("Could not allocate enough DMA memory!");
+        }
     } while (mybuf == NULL);
 
     uint32_t LD = 0;
@@ -152,17 +136,17 @@ void ili9488_flush(lv_disp_drv_t * drv, const lv_area_t * area, lv_color_t * col
 	};
 
 	/*Column addresses*/
-	ili9488_send_cmd(ILI9488_CMD_COLUMN_ADDRESS_SET);
-	ili9488_send_data(xb, 4);
+	ili9488_send_cmd(drv, ILI9488_CMD_COLUMN_ADDRESS_SET);
+	ili9488_send_data(drv, xb, 4);
 
 	/*Page addresses*/
-	ili9488_send_cmd(ILI9488_CMD_PAGE_ADDRESS_SET);
-	ili9488_send_data(yb, 4);
+	ili9488_send_cmd(drv, ILI9488_CMD_PAGE_ADDRESS_SET);
+	ili9488_send_data(drv, yb, 4);
 
 	/*Memory write*/
-	ili9488_send_cmd(ILI9488_CMD_MEMORY_WRITE);
+	ili9488_send_cmd(drv, ILI9488_CMD_MEMORY_WRITE);
 
-	ili9488_send_color((void *) mybuf, size * 3);
+	ili9488_send_color(drv, (void *) mybuf, size * 3);
 	heap_caps_free(mybuf);
 }
 
@@ -170,44 +154,65 @@ void ili9488_flush(lv_disp_drv_t * drv, const lv_area_t * area, lv_color_t * col
  *   STATIC FUNCTIONS
  **********************/
 
+static inline void set_cmd_mode(lv_disp_drv_t * drv)
+{
+    display_port_gpio_dc(drv, 0);
+}
 
-static void ili9488_send_cmd(uint8_t cmd)
+static inline void set_data_mode(lv_disp_drv_t * drv)
+{
+    display_port_gpio_dc(drv, 1);
+}
+
+static void ili9488_send_cmd(lv_disp_drv_t * drv, uint8_t cmd)
 {
     disp_wait_for_pending_transactions();
-    gpio_set_level(ILI9488_DC, 0);	 /*Command mode*/
+    set_cmd_mode(drv);
     disp_spi_send_data(&cmd, 1);
 }
 
-static void ili9488_send_data(void * data, uint16_t length)
+static void ili9488_send_data(lv_disp_drv_t * drv, void * data, uint16_t length)
 {
     disp_wait_for_pending_transactions();
-    gpio_set_level(ILI9488_DC, 1);	 /*Data mode*/
+    set_data_mode(drv);
     disp_spi_send_data(data, length);
 }
 
-static void ili9488_send_color(void * data, uint16_t length)
+static void ili9488_send_color(lv_disp_drv_t * drv, void * data, uint16_t length)
 {
     disp_wait_for_pending_transactions();
-    gpio_set_level(ILI9488_DC, 1);   /*Data mode*/
+    set_data_mode(drv);
     disp_spi_send_colors(data, length);
 }
 
-static void ili9488_set_orientation(uint8_t orientation)
+static void ili9488_set_orientation(lv_disp_drv_t * drv, uint8_t orientation)
 {
-    // ESP_ASSERT(orientation < 4);
+    assert(orientation < 4);
+    const uint8_t data[] = {0x48, 0x88, 0x28, 0xE8};
 
+#if (LV_USE_LOG == 1)
     const char *orientation_str[] = {
         "PORTRAIT", "PORTRAIT_INVERTED", "LANDSCAPE", "LANDSCAPE_INVERTED"
     };
 
-    ESP_LOGI(TAG, "Display orientation: %s", orientation_str[orientation]);
-
-#if defined (CONFIG_LV_PREDEFINED_DISPLAY_NONE)
-    uint8_t data[] = {0x48, 0x88, 0x28, 0xE8};
+    LV_LOG_INFO("Display orientation: %s", orientation_str[orientation]);
+    LV_LOG_INFO("0x36 command value: 0x%02X", data[orientation]);
 #endif
 
-    ESP_LOGI(TAG, "0x36 command value: 0x%02X", data[orientation]);
-
-    ili9488_send_cmd(0x36);
-    ili9488_send_data((void *) &data[orientation], 1);
+    ili9488_send_cmd(drv, 0x36);
+    ili9488_send_data(drv, (void *) &data[orientation], 1);
+}
+
+/* Reset the display, if we don't have a reset pin we use software reset */
+static void ili9488_reset(lv_disp_drv_t *drv)
+{
+#if defined(ILI9488_USE_RST)
+    display_port_gpio_rst(drv, 0);
+    display_port_delay(drv, 100);
+    display_port_gpio_rst(drv, 1);
+    display_port_delay(drv, 100);
+#else
+    ili9488_send_cmd(drv, 0x01);
+    display_port_delay(drv, 5);
+#endif
 }

lvgl_tft/ili9488.h

@@ -20,14 +20,13 @@ extern "C" {
 #else
 #include "lvgl/lvgl.h"
 #endif
+
 #include "../lvgl_helpers.h"
+#include "display_config.h"
 
 /*********************
  *      DEFINES
  *********************/
-#define ILI9488_DC      CONFIG_LV_DISP_PIN_DC
-#define ILI9488_RST     CONFIG_LV_DISP_PIN_RST
-#define ILI9488_USE_RST CONFIG_LV_DISP_USE_RSTS
 
 /*******************
  * ILI9488 REGS
@@ -144,7 +143,7 @@ typedef struct {
  * GLOBAL PROTOTYPES
  **********************/
 
-void ili9488_init(void);
+void ili9488_init(lv_disp_drv_t * drv);
 void ili9488_flush(lv_disp_drv_t * drv, const lv_area_t * area, lv_color_t * color_map);
 
 /**********************

lvgl_tft/jd79653a.c

@@ -29,23 +29,39 @@ TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR TH
 #include <freertos/task.h>
 #include <freertos/event_groups.h>
 #include <driver/gpio.h>
-#include <esp_log.h>
 
 #include "disp_spi.h"
 #include "jd79653a.h"
 
-#define TAG "lv_jd79653a"
-
 #define PIN_DC              CONFIG_LV_DISP_PIN_DC
 #define PIN_DC_BIT          ((1ULL << (uint8_t)(CONFIG_LV_DISP_PIN_DC)))
+
+#if defined CONFIG_LV_DISP_PIN_RST
 #define PIN_RST             CONFIG_LV_DISP_PIN_RST
 #define PIN_RST_BIT         ((1ULL << (uint8_t)(CONFIG_LV_DISP_PIN_RST)))
+#endif
+
 #define PIN_BUSY            CONFIG_LV_DISP_PIN_BUSY
 #define PIN_BUSY_BIT        ((1ULL << (uint8_t)(CONFIG_LV_DISP_PIN_BUSY)))
 #define EVT_BUSY            (1UL << 0UL)
+
+#if defined (LV_HOR_RES_MAX)
 #define EPD_WIDTH           LV_HOR_RES_MAX
+#else
+    /* ToDo Remove magic number */
+#define EPD_WIDTH           256u
+#endif
+
+#if defined (LV_VER_RES_MAX)
 #define EPD_HEIGHT          LV_VER_RES_MAX
+#else
+    /* ToDo Remove magic number */
+#define EPD_HEIGHT          128u
+#endif
+
 #define EPD_ROW_LEN         (EPD_HEIGHT / 8u)
+
+/* ToDo Remove semicolon */
 #define EPD_PARTIAL_CNT     5;
 
 #define BIT_SET(a, b)       ((a) |= (1U << (b)))
@@ -123,10 +139,9 @@ static const uint8_t lut_bb1[] = {
 static const jd79653a_seq_t init_seq[] = {
 #if defined (CONFIG_LV_DISPLAY_ORIENTATION_PORTRAIT_INVERTED)
         {0x00, {0xd3, 0x0e},       2},                 // Panel settings
-#elif defined(CONFIG_LV_DISPLAY_ORIENTATION_PORTRAIT)
-        {0x00, {0xdf, 0x0e}, 2},                 // Panel settings
+//#elif defined(CONFIG_LV_DISPLAY_ORIENTATION_PORTRAIT)
 #else
-#error "Unsupported orientation - only portrait modes are supported for now"
+        {0x00, {0xdf, 0x0e}, 2},                 // Panel settings
 #endif
         {0x4d, {0x55}, 1},                             // Undocumented secret from demo code
         {0xaa, {0x0f}, 1},                             // Undocumented secret from demo code
@@ -176,16 +191,9 @@ static void jd79653a_spi_send_data(uint8_t *data, size_t len)
     disp_spi_send_data(data, len);
 }
 
-static void jd79653a_spi_send_fb(uint8_t *data, size_t len)
-{
-    disp_wait_for_pending_transactions();
-    gpio_set_level(PIN_DC, 1);   // DC = 1 for data
-    disp_spi_send_colors(data, len);
-}
-
 static void jd79653a_spi_send_seq(const jd79653a_seq_t *seq, size_t len)
 {
-    ESP_LOGD(TAG, "Writing cmd/data sequence, count %u", len);
+    LV_LOG_INFO("Writing cmd/data sequence, count %u", len);
 
     if (!seq || len < 1) return;
     for (size_t cmd_idx = 0; cmd_idx < len; cmd_idx++) {
@@ -207,21 +215,21 @@ static esp_err_t jd79653a_wait_busy(uint32_t timeout_ms)
     return ((bits & EVT_BUSY) != 0) ? ESP_OK : ESP_ERR_TIMEOUT;
 }
 
-static void jd79653a_power_on()
+static void jd79653a_power_on(void)
 {
     jd79653a_spi_send_seq(power_on_seq, EPD_SEQ_LEN(power_on_seq));
     vTaskDelay(pdMS_TO_TICKS(10));
     jd79653a_wait_busy(0);
 }
 
-static void jd79653a_power_off()
+static void jd79653a_power_off(void)
 {
     jd79653a_spi_send_seq(power_off_seq, EPD_SEQ_LEN(power_off_seq));
     vTaskDelay(pdMS_TO_TICKS(10));
     jd79653a_wait_busy(0);
 }
 
-static void jd79653a_load_partial_lut()
+static void jd79653a_load_partial_lut(void)
 {
     jd79653a_spi_send_cmd(0x20); // LUT VCOM register
     jd79653a_spi_send_data((uint8_t *)lut_vcom_dc1, sizeof(lut_vcom_dc1));
@@ -239,9 +247,9 @@ static void jd79653a_load_partial_lut()
     jd79653a_spi_send_data((uint8_t *)lut_bb1, sizeof(lut_bb1));
 }
 
-static void jd79653a_partial_in()
+static void jd79653a_partial_in(void)
 {
-    ESP_LOGD(TAG, "Partial in!");
+    LV_LOG_INFO("Partial in!");
 
     // Panel setting: accept LUT from registers instead of OTP
 #if defined (CONFIG_LV_DISPLAY_ORIENTATION_PORTRAIT_INVERTED)
@@ -249,7 +257,8 @@ static void jd79653a_partial_in()
 #elif defined(CONFIG_LV_DISPLAY_ORIENTATION_PORTRAIT)
     uint8_t pst_use_reg_lut[] = { 0xff, 0x0e };
 #else
-#error "Unsupported orientation - only portrait modes are supported for now"
+    assert(false); // Unsupported orientation configured. Crash if we get here, but allow compilation for CI
+    uint8_t pst_use_reg_lut[] = { 0,0 };
 #endif
     jd79653a_spi_send_cmd(0x00);
     jd79653a_spi_send_data(pst_use_reg_lut, sizeof(pst_use_reg_lut));
@@ -266,9 +275,9 @@ static void jd79653a_partial_in()
     jd79653a_spi_send_cmd(0x91);
 }
 
-static void jd79653a_partial_out()
+static void jd79653a_partial_out(void)
 {
-    ESP_LOGD(TAG, "Partial out!");
+    LV_LOG_INFO("Partial out!");
 
     // Panel setting: use LUT from OTP
 #if defined (CONFIG_LV_DISPLAY_ORIENTATION_PORTRAIT_INVERTED)
@@ -276,7 +285,8 @@ static void jd79653a_partial_out()
 #elif defined(CONFIG_LV_DISPLAY_ORIENTATION_PORTRAIT)
     uint8_t pst_use_otp_lut[] = { 0xdf, 0x0e };
 #else
-#error "Unsupported orientation - only portrait modes are supported for now"
+    assert(false); // Unsupported orientation configured. Crash if we get here, but allow compilation for CI
+    uint8_t pst_use_otp_lut[] = { 0,0 };
 #endif
     jd79653a_spi_send_cmd(0x00);
     jd79653a_spi_send_data(pst_use_otp_lut, sizeof(pst_use_otp_lut));
@@ -294,10 +304,10 @@ static void jd79653a_update_partial(uint8_t x1, uint8_t y1, uint8_t x2, uint8_t
 {
     jd79653a_power_on();
     jd79653a_partial_in();
-    ESP_LOGD(TAG, "x1: 0x%x, x2: 0x%x, y1: 0x%x, y2: 0x%x", x1, x2, y1, y2);
+    LV_LOG_INFO("x1: 0x%x, x2: 0x%x, y1: 0x%x, y2: 0x%x", x1, x2, y1, y2);
 
     size_t len = ((x2 - x1 + 1) * (y2 - y1 + 1)) / 8;
-    ESP_LOGD(TAG, "Writing PARTIAL LVGL fb with len: %u", len);
+    LV_LOG_INFO("Writing PARTIAL LVGL fb with len: %u", len);
 
     // Set partial window
     uint8_t ptl_setting[7] = { x1, x2, 0, y1, 0, y2, 0x01 };
@@ -313,16 +323,18 @@ static void jd79653a_update_partial(uint8_t x1, uint8_t y1, uint8_t x2, uint8_t
         len -= EPD_ROW_LEN;
     }
 
-    ESP_LOGD(TAG, "Partial wait start");
+    LV_LOG_INFO("Partial wait start");
 
     jd79653a_spi_send_cmd(0x12);
     jd79653a_wait_busy(0);
 
-    ESP_LOGD(TAG, "Partial updated");
+    LV_LOG_INFO("Partial updated");
     jd79653a_partial_out();
     jd79653a_power_off();
 }
 
+static void jd79653a_reset(void);
+
 void jd79653a_fb_set_full_color(uint8_t color)
 {
     jd79653a_power_on();
@@ -353,7 +365,7 @@ void jd79653a_fb_set_full_color(uint8_t color)
 void jd79653a_fb_full_update(uint8_t *data, size_t len)
 {
     jd79653a_power_on();
-    ESP_LOGD(TAG, "Performing full update, len: %u", len);
+    LV_LOG_INFO("Performing full update, len: %u", len);
 
     uint8_t *data_ptr = data;
 
@@ -372,7 +384,7 @@ void jd79653a_fb_full_update(uint8_t *data, size_t len)
         len -= EPD_ROW_LEN;
     }
 
-    ESP_LOGD(TAG, "Rest len: %u", len);
+    LV_LOG_INFO("Rest len: %u", len);
 
     jd79653a_spi_send_cmd(0x12); // Issue refresh command
     vTaskDelay(pdMS_TO_TICKS(100));
@@ -381,7 +393,7 @@ void jd79653a_fb_full_update(uint8_t *data, size_t len)
     jd79653a_power_off();
 }
 
-void jd79653a_lv_set_fb_cb(struct _disp_drv_t *disp_drv, uint8_t *buf, lv_coord_t buf_w, lv_coord_t x, lv_coord_t y,
+void jd79653a_lv_set_fb_cb(lv_disp_drv_t *disp_drv, uint8_t *buf, lv_coord_t buf_w, lv_coord_t x, lv_coord_t y,
                            lv_color_t color, lv_opa_t opa)
 {
     uint16_t byte_index = (x >> 3u) + (y * EPD_ROW_LEN);
@@ -394,7 +406,7 @@ void jd79653a_lv_set_fb_cb(struct _disp_drv_t *disp_drv, uint8_t *buf, lv_coord_
     }
 }
 
-void jd79653a_lv_rounder_cb(struct _disp_drv_t *disp_drv, lv_area_t *area)
+void jd79653a_lv_rounder_cb(lv_disp_drv_t *disp_drv, lv_area_t *area)
 {
     // Always send full framebuffer if it's not in partial mode
     area->x1 = 0;
@@ -405,15 +417,16 @@ void jd79653a_lv_rounder_cb(struct _disp_drv_t *disp_drv, lv_area_t *area)
 
 void jd79653a_lv_fb_flush(lv_disp_drv_t *drv, const lv_area_t *area, lv_color_t *color_map)
 {
+#if LV_USE_LOG
     size_t len = ((area->x2 - area->x1 + 1) * (area->y2 - area->y1 + 1)) / 8;
-
-    ESP_LOGD(TAG, "x1: 0x%x, x2: 0x%x, y1: 0x%x, y2: 0x%x", area->x1, area->x2, area->y1, area->y2);
-    ESP_LOGD(TAG, "Writing LVGL fb with len: %u, partial counter: %u", len, partial_counter);
+    LV_LOG_INFO("x1: 0x%x, x2: 0x%x, y1: 0x%x, y2: 0x%x", area->x1, area->x2, area->y1, area->y2);
+    LV_LOG_INFO("Writing LVGL fb with len: %u, partial counter: %u", len, partial_counter);
+#endif
 
     uint8_t *buf = (uint8_t *) color_map;
 
     if (partial_counter == 0) {
-        ESP_LOGD(TAG, "Refreshing in FULL");
+        LV_LOG_INFO("Refreshing in FULL");
         jd79653a_fb_full_update(buf, ((EPD_HEIGHT * EPD_WIDTH) / 8));
         partial_counter = EPD_PARTIAL_CNT; // Reset partial counter here
     } else {
@@ -424,7 +437,7 @@ void jd79653a_lv_fb_flush(lv_disp_drv_t *drv, const lv_area_t *area, lv_color_t
     lv_disp_flush_ready(drv);
 }
 
-void jd79653a_deep_sleep()
+void jd79653a_deep_sleep(void)
 {
     jd79653a_spi_send_seq(power_off_seq, EPD_SEQ_LEN(power_off_seq));
     jd79653a_wait_busy(1000);
@@ -434,25 +447,15 @@ void jd79653a_deep_sleep()
     jd79653a_spi_send_data(&check_code, sizeof(check_code));
 }
 
-void jd79653a_init()
+void jd79653a_init(void)
 {
     // Initialise event group
     jd79653a_evts = xEventGroupCreate();
     if (!jd79653a_evts) {
-        ESP_LOGE(TAG, "Failed when initialising event group!");
+        LV_LOG_ERROR("Failed when initialising event group!");
         return;
     }
 
-    // Setup output pins, output (PP)
-    gpio_config_t out_io_conf = {
-            .intr_type = GPIO_INTR_DISABLE,
-            .mode = GPIO_MODE_OUTPUT,
-            .pin_bit_mask = PIN_DC_BIT | PIN_RST_BIT,
-            .pull_down_en = 0,
-            .pull_up_en = 0,
-    };
-    ESP_ERROR_CHECK(gpio_config(&out_io_conf));
-
     // Setup input pin, pull-up, input
     gpio_config_t in_io_conf = {
             .intr_type = GPIO_INTR_POSEDGE,
@@ -465,18 +468,25 @@ void jd79653a_init()
     gpio_install_isr_service(0);
     gpio_isr_handler_add(PIN_BUSY, jd79653a_busy_intr, (void *) PIN_BUSY);
 
-    // Hardware reset
-    gpio_set_level(PIN_RST, 0);
-    vTaskDelay(pdMS_TO_TICKS(15)); // At least 10ms, leave 15ms for now just in case...
-    gpio_set_level(PIN_RST, 1);
-    vTaskDelay(pdMS_TO_TICKS(120));
+    jd79653a_reset();
 
     // Dump in initialise sequence
     jd79653a_spi_send_seq(init_seq, EPD_SEQ_LEN(init_seq));
-    ESP_LOGI(TAG, "Panel init sequence sent");
+    LV_LOG_INFO("Panel init sequence sent");
 
     // Check BUSY status here
     jd79653a_wait_busy(0);
 
-    ESP_LOGI(TAG, "Panel is up!");
+    LV_LOG_INFO("Panel is up!");
+}
+
+static void jd79653a_reset(void)
+{
+#if defined CONFIG_LV_DISP_PIN_RST
+    gpio_set_level(PIN_RST, 0);
+    // At least 10ms, leave 15ms for now just in case...
+    vTaskDelay(pdMS_TO_TICKS(15));
+    gpio_set_level(PIN_RST, 1);
+    vTaskDelay(pdMS_TO_TICKS(120));
+#endif
 }

lvgl_tft/jd79653a.h

@@ -17,12 +17,12 @@ extern "C"
 #include "lvgl/lvgl.h"
 #endif
 
-void jd79653a_init();
-void jd79653a_deep_sleep();
+void jd79653a_init(void);
+void jd79653a_deep_sleep(void);
 
-void jd79653a_lv_set_fb_cb(struct _disp_drv_t * disp_drv, uint8_t* buf, lv_coord_t buf_w, lv_coord_t x, lv_coord_t y,
+void jd79653a_lv_set_fb_cb(lv_disp_drv_t * disp_drv, uint8_t* buf, lv_coord_t buf_w, lv_coord_t x, lv_coord_t y,
                                                  lv_color_t color, lv_opa_t opa);
-void jd79653a_lv_rounder_cb(struct _disp_drv_t * disp_drv, lv_area_t *area);
+void jd79653a_lv_rounder_cb(lv_disp_drv_t * disp_drv, lv_area_t *area);
 void jd79653a_lv_fb_flush(lv_disp_drv_t *drv, const lv_area_t *area, lv_color_t *color_map);
 
 void jd79653a_fb_set_full_color(uint8_t color);

lvgl_tft/pcd8544.c

@@ -6,15 +6,11 @@
  *    https://github.com/olikraus/u8g2
  */
 
-#include "disp_spi.h"
-#include "driver/gpio.h"
-
-#include <esp_log.h>
-#include "freertos/FreeRTOS.h"
-#include "freertos/task.h"
-
 #include "pcd8544.h"
 
+#include "disp_spi.h"
+#include "display_port.h"
+
 #define TAG "lv_pcd8544"
 
 /**********************
@@ -27,24 +23,33 @@
 /**********************
  *   STATIC FUNCTIONS
  **********************/
+static inline void set_cmd_mode(lv_disp_drv_t * drv)
+{
+    display_port_gpio_dc(drv, 0);
+}
 
-static void pcd8544_send_cmd(uint8_t cmd)
+static inline void set_data_mode(lv_disp_drv_t * drv)
+{
+    display_port_gpio_dc(drv, 1);
+}
+
+static void pcd8544_send_cmd(lv_disp_drv_t *drv, uint8_t cmd)
 {
     disp_wait_for_pending_transactions();
-    gpio_set_level(PCD8544_DC, 0);	 /*Command mode*/
+    set_cmd_mode(drv);
     disp_spi_send_data(&cmd, 1);
 }
 
-static void pcd8544_send_data(void * data, uint16_t length)
+static void pcd8544_send_data(lv_disp_drv_t *drv, void * data, uint16_t length)
 {
     disp_wait_for_pending_transactions();
-    gpio_set_level(PCD8544_DC, 1);	 /*Data mode*/
+    set_data_mode(drv);
     disp_spi_send_data(data, length);
 }
 
-static void pcd8544_send_colors(void * data, uint16_t length)
+static void pcd8544_send_colors(lv_disp_drv_t *drv, void * data, uint16_t length)
 {
-    gpio_set_level(PCD8544_DC, 1);	 /*Data mode*/
+    set_data_mode(drv);
     disp_spi_send_colors(data, length);
 }
 
@@ -52,37 +57,38 @@ static void pcd8544_send_colors(void * data, uint16_t length)
  *   GLOBAL FUNCTIONS
  **********************/
 
-void pcd8544_init(void){
-
-    // TODO: orientation
-
-    // Initialize non-SPI GPIOs
-    gpio_pad_select_gpio(PCD8544_DC);
-    gpio_set_direction(PCD8544_DC, GPIO_MODE_OUTPUT);
-    gpio_pad_select_gpio(PCD8544_RST);
-    gpio_set_direction(PCD8544_RST, GPIO_MODE_OUTPUT);
-
-    // Reset the display
-    gpio_set_level(PCD8544_RST, 0);
-    vTaskDelay(100 / portTICK_RATE_MS);
-    gpio_set_level(PCD8544_RST, 1);
-    vTaskDelay(100 / portTICK_RATE_MS);
-
-    pcd8544_send_cmd(0x21);     /* activate chip (PD=0), horizontal increment (V=0), enter extended command set (H=1) */
-    pcd8544_send_cmd(0x06);     /* temp. control: b10 = 2  */
-    pcd8544_send_cmd(0x13);     /* bias system 1:48 */
-    pcd8544_send_cmd(0xc0);     /* medium Vop = Contrast 0x40 = 64 */
-
-    pcd8544_send_cmd(0x20);     /* activate chip (PD=0), horizontal increment (V=0), enter extended command set (H=0) */
-    pcd8544_send_cmd(0x0c);     /* display mode normal */
+void pcd8544_reset(lv_disp_drv_t *drv)
+{
+    display_port_gpio_rst(drv, 0);
+    display_port_delay(drv, 100);
+    display_port_gpio_rst(drv, 1);
+    display_port_delay(drv, 100);
 }
 
-void pcd8544_set_contrast (uint8_t contrast){
+void pcd8544_init(lv_disp_drv_t *drv)
+{
+    // TODO: orientation
+
+    // Reset the display
+    pcd8544_reset(drv);
+
+    pcd8544_send_cmd(drv, 0x21);     /* activate chip (PD=0), horizontal increment (V=0), enter extended command set (H=1) */
+    pcd8544_send_cmd(drv, 0x06);     /* temp. control: b10 = 2  */
+    pcd8544_send_cmd(drv, 0x13);     /* bias system 1:48 */
+    pcd8544_send_cmd(drv, 0xc0);     /* medium Vop = Contrast 0x40 = 64 */
+
+    pcd8544_send_cmd(drv, 0x20);     /* activate chip (PD=0), horizontal increment (V=0), enter extended command set (H=0) */
+    pcd8544_send_cmd(drv, 0x0c);     /* display mode normal */
+}
+
+void pcd8544_set_contrast(lv_disp_drv_t *drv, uint8_t contrast)
+{
     if (contrast > 0x7f){
         contrast = 0x7f;
     }
-    pcd8544_send_cmd(0x21);                /* activate chip (PD=0), horizontal increment (V=0), enter extended command set (H=1) */
-    pcd8544_send_cmd(0x80 | contrast);     /* medium Vop = Contrast */
+
+    pcd8544_send_cmd(drv, 0x21);                /* activate chip (PD=0), horizontal increment (V=0), enter extended command set (H=1) */
+    pcd8544_send_cmd(drv, 0x80 | contrast);     /* medium Vop = Contrast */
 }
 
 void pcd8544_rounder(lv_disp_drv_t * disp_drv, lv_area_t *area){
@@ -112,7 +118,7 @@ void pcd8544_set_px_cb(lv_disp_drv_t * disp_drv, uint8_t * buf, lv_coord_t buf_w
 
 void pcd8544_flush(lv_disp_drv_t * disp_drv, const lv_area_t * area, lv_color_t * color_map){
 
-    pcd8544_send_cmd(0x20);     /* activate chip (PD=0), horizontal increment (V=0), enter extended command set (H=0) */
+    pcd8544_send_cmd(disp_drv, 0x20);     /* activate chip (PD=0), horizontal increment (V=0), enter extended command set (H=0) */
 
     uint8_t * buf = (uint8_t *) color_map;
 
@@ -123,9 +129,9 @@ void pcd8544_flush(lv_disp_drv_t * disp_drv, const lv_area_t * area, lv_color_t
         // send complete frame buffer at once. 
         // NOTE: disp_spi_send_colors triggers lv_disp_flush_ready
 
-        pcd8544_send_cmd(0x40);  /* set Y address */
-        pcd8544_send_cmd(0x80);  /* set X address */
-        pcd8544_send_colors(buf, disp_drv->hor_res * disp_drv->ver_res / 8);
+        pcd8544_send_cmd(disp_drv, 0x40);  /* set Y address */
+        pcd8544_send_cmd(disp_drv, 0x80);  /* set X address */
+        pcd8544_send_colors(disp_drv, buf, disp_drv->hor_res * disp_drv->ver_res / 8);
 
     } else {
 
@@ -136,11 +142,11 @@ void pcd8544_flush(lv_disp_drv_t * disp_drv, const lv_area_t * area, lv_color_t
 
         uint16_t bank;
         uint16_t cols_to_update = area->x2 - area->x1 + 1;
-        for (bank = bank_start ; bank <= bank_end ; bank++ ){
-            pcd8544_send_cmd(0x40 | bank );      /* set Y address */
-            pcd8544_send_cmd(0x80 | area->x1 );  /* set X address */
+        for (bank = bank_start ; bank <= bank_end ; bank++){
+            pcd8544_send_cmd(disp_drv, 0x40 | bank);      /* set Y address */
+            pcd8544_send_cmd(disp_drv, 0x80 | area->x1);  /* set X address */
             uint16_t offset = bank * disp_drv->hor_res + area->x1;
-            pcd8544_send_data(&buf[offset], cols_to_update);
+            pcd8544_send_data(disp_drv, &buf[offset], cols_to_update);
         }
 
         lv_disp_flush_ready(disp_drv);

lvgl_tft/pcd8544.h

@@ -26,10 +26,6 @@ extern "C" {
  *      DEFINES
  *********************/
 
-#define PCD8544_DC   CONFIG_LV_DISP_PIN_DC
-#define PCD8544_RST  CONFIG_LV_DISP_PIN_RST
-#define PCD8544_BCKL CONFIG_LV_DISP_PIN_BCKL
-
 /**********************
  *      TYPEDEFS
  **********************/
@@ -38,12 +34,12 @@ extern "C" {
  * GLOBAL PROTOTYPES
  **********************/
 
-void pcd8544_init(void);
+void pcd8544_init(lv_disp_drv_t *drv);
 void pcd8544_flush(lv_disp_drv_t * drv, const lv_area_t * area, lv_color_t * color_map);
 void pcd8544_rounder(lv_disp_drv_t * disp_drv, lv_area_t *area);
 void pcd8544_set_px_cb(lv_disp_drv_t * disp_drv, uint8_t * buf, lv_coord_t buf_w, lv_coord_t x, lv_coord_t y,
                        lv_color_t color, lv_opa_t opa);
-void pcd8544_set_contrast(uint8_t contrast);
+void pcd8544_set_contrast(lv_disp_drv_t *drv, uint8_t contrast);
 
 /**********************
  *      MACROS

lvgl_tft/ra8875.c

@@ -9,16 +9,12 @@
 #include "ra8875.h"
 #include "disp_spi.h"
 #include "driver/gpio.h"
-#include "esp_log.h"
 #include "freertos/FreeRTOS.h"
 #include "freertos/task.h"
 
 /*********************
  *      DEFINES
  *********************/
-#define DEBUG false
-#define TAG "RA8875"
-
 #define DIV_ROUND_UP(n, d) (((n)+(d)-1)/(d))
 
 #define SPI_CLOCK_SPEED_SLOW_HZ 1000000
@@ -28,6 +24,45 @@
 #define RA8875_MODE_CMD_WRITE   (0x80)
 #define RA8875_MODE_STATUS_READ (0xC0)
 
+#define BYTES_PER_PIXEL (LV_COLOR_DEPTH / 8)
+
+#if defined (LV_HOR_RES_MAX)
+#define HDWR_VAL (LV_HOR_RES_MAX/8 - 1)
+#else
+    /* ToDo Remove magic number 256u */
+#define HDWR_VAL (256u/8u - 1u)
+#endif
+
+#if defined (LV_VER_RES_MAX)
+#define VDHR_VAL (LV_VER_RES_MAX - 1)
+#else
+    /* ToDo Remove magic number 128u */
+#define VDHR_VAL (128u - 1u)
+#endif
+
+#define VDIR_MASK (1 << 2)
+#define HDIR_MASK (1 << 3)
+
+#ifndef CONFIG_LV_TFT_DISPLAY_CONTROLLER_RA8875
+    // Use this settings if there is no Kconfig settings defined
+    #define SYSR_VAL (0x00)
+    #define DPCR_VAL (0x00)
+    #define PCSR_VAL (0x00)
+    #define HNDR_VAL (0x00)
+    #define HNDFTR_VAL (0x00)
+    #define HSTR_VAL (0x00)
+    #define HPW (0x00)
+    #define HPWR_VAL (0x00)
+    #define VNDR_VAL (0x00)
+    #define VSTR_VAL (0x00)
+    #define VPW      (0x00)
+    #define VPWR_VAL (0x00)
+    #define CONFIG_LV_DISP_RA8875_PLLDIVM (0x00)
+    #define CONFIG_LV_DISP_RA8875_PLLDIVN (0x00)
+    #define CONFIG_LV_DISP_RA8875_PLLDIVK (0x00)
+
+#else
+
 #if (LV_COLOR_DEPTH == 8)
     #define SYSR_VAL (0x00)
 #elif (LV_COLOR_DEPTH == 16)
@@ -35,13 +70,6 @@
 #else
     #error "Unsupported color depth (LV_COLOR_DEPTH)"
 #endif
-#define BYTES_PER_PIXEL (LV_COLOR_DEPTH / 8)
-
-#define HDWR_VAL (LV_HOR_RES_MAX/8 - 1)
-#define VDHR_VAL (LV_VER_RES_MAX - 1)
-
-#define VDIR_MASK (1 << 2)
-#define HDIR_MASK (1 << 3)
 
 #if ( CONFIG_LV_DISPLAY_ORIENTATION_PORTRAIT_INVERTED || CONFIG_LV_DISPLAY_ORIENTATION_LANDSCAPE_INVERTED )
     #if CONFIG_LV_INVERT_DISPLAY
@@ -92,6 +120,7 @@
 #else
     #define VPWR_VAL (VPW)
 #endif
+#endif // CONFIG_LV_TFT_DISPLAY_CONTROLLER_RA8875
 
 /**********************
  *      TYPEDEFS
@@ -104,7 +133,7 @@ static void ra8875_configure_clocks(bool high_speed);
 static void ra8875_set_memory_write_cursor(unsigned int x, unsigned int y);
 static void ra8875_set_window(unsigned int xs, unsigned int xe, unsigned int ys, unsigned int ye);
 static void ra8875_send_buffer(uint8_t * data, size_t length, bool signal_flush);
-
+static void ra8875_reset(void);
 /**********************
  *  STATIC VARIABLES
  **********************/
@@ -119,6 +148,9 @@ static void ra8875_send_buffer(uint8_t * data, size_t length, bool signal_flush)
 
 void ra8875_init(void)
 {
+#ifndef CONFIG_LV_TFT_DISPLAY_CONTROLLER_RA8875
+    assert(false); // This driver is not properly configured
+#endif
     unsigned int i = 0;
 
     struct {
@@ -146,20 +178,9 @@ void ra8875_init(void)
     };
     #define INIT_CMDS_SIZE (sizeof(init_cmds)/sizeof(init_cmds[0]))
 
-    ESP_LOGI(TAG, "Initializing RA8875...");
+    LV_LOG_INFO("Initializing RA8875...");
 
-    // Initialize non-SPI GPIOs
-
-#if RA8875_USE_RST
-    gpio_pad_select_gpio(RA8875_RST);
-    gpio_set_direction(RA8875_RST, GPIO_MODE_OUTPUT);
-
-    // Reset the RA8875
-    gpio_set_level(RA8875_RST, 0);
-    vTaskDelay(DIV_ROUND_UP(100, portTICK_RATE_MS));
-    gpio_set_level(RA8875_RST, 1);
-    vTaskDelay(DIV_ROUND_UP(100, portTICK_RATE_MS));
-#endif
+    ra8875_reset();
 
     // Initalize RA8875 clocks (SPI must be decelerated before initializing clocks)
     disp_spi_change_device_speed(SPI_CLOCK_SPEED_SLOW_HZ);
@@ -180,7 +201,7 @@ void ra8875_init(void)
         vTaskDelay(1);
     }
     if (i == 0) {
-        ESP_LOGW(TAG, "WARNING: Memory clear timed out; RA8875 may be unresponsive.");
+        LV_LOG_WARN("WARNING: Memory clear timed out; RA8875 may be unresponsive.");
     }
 
     // Enable the display
@@ -189,7 +210,7 @@ void ra8875_init(void)
 
 void ra8875_enable_display(bool enable)
 {
-    ESP_LOGI(TAG, "%s display.", enable ? "Enabling" : "Disabling");
+    LV_LOG_INFO("%s display.", enable ? "Enabling" : "Disabling");
     uint8_t val = enable ? (0x80) : (0x00);
     ra8875_write_cmd(RA8875_REG_PWRR, val);            // Power and Display Control Register (PWRR)
 }
@@ -205,35 +226,47 @@ void ra8875_flush(lv_disp_drv_t * drv, const lv_area_t * area, lv_color_t * colo
     size_t linelen = (area->x2 - area->x1 + 1);
     uint8_t * buffer = (uint8_t*)color_map;
 
-#if DEBUG
-    ESP_LOGI(TAG, "flush: %d,%d at %d,%d", area->x1, area->x2, area->y1, area->y2 );
-#endif
+    LV_LOG_INFO("flush: %d,%d at %d,%d", area->x1, area->x2, area->y1, area->y2 );
 
     // Get lock
     disp_spi_acquire();
 
     // Set window if needed
     if ((x1 != area->x1) || (x2 != area->x2)) {
-#if DEBUG
-        ESP_LOGI(TAG, "flush: set window (x1,x2): %d,%d -> %d,%d", x1, x2, area->x1, area->x2);
+        LV_LOG_INFO("flush: set window (x1,x2): %d,%d -> %d,%d", x1, x2, area->x1, area->x2);
+        unsigned int ye = 0;
+
+#if LVGL_VERSION_MAJOR < 8
+        ye = LV_VER_RES_MAX - 1;
+#else
+        /* ToDo Get y end from driver information */
 #endif
-        ra8875_set_window(area->x1, area->x2, 0, LV_VER_RES_MAX-1);
+        
+        ra8875_set_window(area->x1, area->x2, 0, ye);
+        
         x1 = area->x1;
         x2 = area->x2;
     }
 
     // Set cursor if needed
     if ((x != area->x1) || (y != area->y1)) {
-#if DEBUG
-        ESP_LOGI(TAG, "flush: set cursor (x,y): %d,%d -> %d,%d", x, y, area->x1, area->y1);
-#endif
+        LV_LOG_INFO("flush: set cursor (x,y): %d,%d -> %d,%d", x, y, area->x1, area->y1);
         ra8875_set_memory_write_cursor(area->x1, area->y1);
         x = area->x1;
     }
 
     // Update to future cursor location
     y = area->y2 + 1;
-    if (y >= LV_VER_RES_MAX) {
+    lv_coord_t ver_max = 0;
+    
+#if LVGL_VERSION_MAJOR < 8
+    ver_max = LV_VER_RES_MAX; 
+#else
+    /* ToDo Get vertical max from driver information */
+    ver_max = lv_disp_get_ver_res((lv_disp_t *) drv);
+#endif
+    
+    if (y >= ver_max) {
         y = 0;
     }
 
@@ -332,3 +365,13 @@ static void ra8875_send_buffer(uint8_t * data, size_t length, bool signal_flush)
                           | (RA8875_MODE_DATA_WRITE);          // Data write mode
     disp_spi_transaction(data, length, flags, NULL, prefix, 0);
 }
+
+static void ra8875_reset(void)
+{
+#if RA8875_USE_RST
+    gpio_set_level(RA8875_RST, 0);
+    vTaskDelay(DIV_ROUND_UP(100, portTICK_RATE_MS));
+    gpio_set_level(RA8875_RST, 1);
+    vTaskDelay(DIV_ROUND_UP(100, portTICK_RATE_MS));
+#endif
+}

lvgl_tft/schmitt.c

@@ -1,27 +0,0 @@
-#include <stdio.h>
-
-#include "schmitt.h"
-#include "disp_spi.h"
-
-#include "esp_log.h"
-
-static const char* TAG = "SCHMITT_DIS";
-
-void schmitt_init(void)
-{
-	disp_spi_acquire();
-	// Do things
-	ESP_LOGI(TAG, "schmitt_init() called");
-	disp_spi_release();
-}
-
-void schmitt_flush(lv_disp_drv_t * drv, const lv_area_t * area, lv_color_t * color_map)
-{
-	disp_spi_acquire();
-	// Do things
-	uint32_t size = lv_area_get_width(area) * lv_area_get_height(area);
-	disp_spi_send_colors(color_map, size * 4);
-	ESP_LOGI(TAG, "schmitt_flush() called");
-	disp_spi_release();
-	lv_disp_flush_ready(drv);
-}

lvgl_tft/schmitt.h

@@ -1,20 +0,0 @@
-#ifndef SCHMITT_H_
-#define SCHMITT_H_
-
-#include <stdint.h>
-
-#ifdef LV_LVGL_H_INCLUDE_SIMPLE
-#include "lvgl.h"
-#else
-#include "lvgl/lvgl.h"
-#endif
-#include "../lvgl_helpers.h"
-
-#define LV_HOR_RES_MAX 64
-#define LV_VER_RES_MAX 64
-
-void schmitt_init(void);
-
-void schmitt_flush(lv_disp_drv_t * drv, const lv_area_t * area, lv_color_t * color_map);
-
-#endif /* SCHMITT_H_ */

lvgl_tft/sh1107.c

@@ -16,7 +16,6 @@
 /*********************
  *      DEFINES
  *********************/
- #define TAG "SH1107"
 
 /**********************
  *      TYPEDEFS
@@ -35,6 +34,10 @@ typedef struct {
 static void sh1107_send_cmd(uint8_t cmd);
 static void sh1107_send_data(void * data, uint16_t length);
 static void sh1107_send_color(void * data, uint16_t length);
+static void sh1107_reset(void);
+
+static lv_coord_t get_display_ver_res(lv_disp_drv_t *disp_drv);
+static lv_coord_t get_display_hor_res(lv_disp_drv_t *disp_drv);
 
 /**********************
  *  STATIC VARIABLES
@@ -91,20 +94,7 @@ void sh1107_init(void)
         {0, {0}, 0xff},
 	};
 
-	//Initialize non-SPI GPIOs
-        gpio_pad_select_gpio(SH1107_DC);
-	gpio_set_direction(SH1107_DC, GPIO_MODE_OUTPUT);
-
-#if SH1107_USE_RST
-        gpio_pad_select_gpio(SH1107_RST);
-	gpio_set_direction(SH1107_RST, GPIO_MODE_OUTPUT);
-
-	//Reset the display
-	gpio_set_level(SH1107_RST, 0);
-	vTaskDelay(100 / portTICK_RATE_MS);
-	gpio_set_level(SH1107_RST, 1);
-	vTaskDelay(100 / portTICK_RATE_MS);
-#endif
+    sh1107_reset();
 
     //Send all the commands
     uint16_t cmd = 0;
@@ -118,7 +108,7 @@ void sh1107_init(void)
     }
 }
 
-void sh1107_set_px_cb(struct _disp_drv_t * disp_drv, uint8_t * buf, lv_coord_t buf_w, lv_coord_t x, lv_coord_t y,
+void sh1107_set_px_cb(lv_disp_drv_t * disp_drv, uint8_t * buf, lv_coord_t buf_w, lv_coord_t x, lv_coord_t y,
         lv_color_t color, lv_opa_t opa)
 {
 	/* buf_w will be ignored, the configured CONFIG_LV_DISPLAY_HEIGHT and _WIDTH,
@@ -127,10 +117,10 @@ void sh1107_set_px_cb(struct _disp_drv_t * disp_drv, uint8_t * buf, lv_coord_t b
     uint8_t  bit_index = 0;
 
 #if defined CONFIG_LV_DISPLAY_ORIENTATION_LANDSCAPE
-	byte_index = y + (( x>>3 ) * LV_VER_RES_MAX);
+	byte_index = y + (( x>>3 ) * get_display_ver_res(disp_drv));
 	bit_index  = x & 0x7;
 #elif defined CONFIG_LV_DISPLAY_ORIENTATION_PORTRAIT
-    byte_index = x + (( y>>3 ) * LV_HOR_RES_MAX);
+    byte_index = x + (( y>>3 ) * get_display_hor_res(disp_drv));
     bit_index  = y & 0x7;
 #endif
 
@@ -162,9 +152,9 @@ void sh1107_flush(lv_disp_drv_t * drv, const lv_area_t * area, lv_color_t * colo
 	    sh1107_send_cmd(0xB0 | i);                  // Set Page Start Address for Page Addressing Mode
 	    size = area->y2 - area->y1 + 1;
 #if defined CONFIG_LV_DISPLAY_ORIENTATION_LANDSCAPE
-        ptr = color_map + i * LV_VER_RES_MAX;
+        ptr = color_map + i * get_display_ver_res(drv);
 #else
-        ptr = color_map + i * LV_HOR_RES_MAX;
+        ptr = color_map + i * get_display_hor_res(drv);
 #endif
         if(i != row2){
 	    sh1107_send_data( (void *) ptr, size);
@@ -175,21 +165,21 @@ void sh1107_flush(lv_disp_drv_t * drv, const lv_area_t * area, lv_color_t * colo
     }
 }
 
-void sh1107_rounder(struct _disp_drv_t * disp_drv, lv_area_t *area)
+void sh1107_rounder(lv_disp_drv_t * disp_drv, lv_area_t *area)
 {
     // workaround: always send complete size display buffer
     area->x1 = 0;
     area->y1 = 0;
-    area->x2 = LV_HOR_RES_MAX-1;
-    area->y2 = LV_VER_RES_MAX-1;
+    area->x2 = get_display_hor_res(disp_drv) - 1;
+    area->y2 = get_display_ver_res(disp_drv) - 1;
 }
 
-void sh1107_sleep_in()
+void sh1107_sleep_in(void)
 {
     sh1107_send_cmd(0xAE);
 }
 
-void sh1107_sleep_out()
+void sh1107_sleep_out(void)
 {
     sh1107_send_cmd(0xAF);
 }
@@ -219,3 +209,49 @@ static void sh1107_send_color(void * data, uint16_t length)
     gpio_set_level(SH1107_DC, 1);   /*Data mode*/
     disp_spi_send_colors(data, length);
 }
+
+static lv_coord_t get_display_ver_res(lv_disp_drv_t *disp_drv)
+{
+    lv_coord_t val = 0;
+
+#if LVGL_VERSION_MAJOR < 8
+#if defined CONFIG_LV_DISPLAY_ORIENTATION_LANDSCAPE
+    val = LV_VER_RES_MAX;
+#endif
+#else
+    /* ToDo Use display rotation API to get vertical size */
+#if defined CONFIG_LV_DISPLAY_ORIENTATION_LANDSCAPE
+    val = lv_disp_get_ver_res((lv_disp_t *) disp_drv);
+#endif
+#endif
+
+    return val;
+}
+
+static lv_coord_t get_display_hor_res(lv_disp_drv_t *disp_drv)
+{
+    lv_coord_t val = 0;
+
+#if LVGL_VERSION_MAJOR < 8
+#if defined CONFIG_LV_DISPLAY_ORIENTATION_PORTRAIT
+    val = LV_HOR_RES_MAX;
+#endif
+#else
+    /* ToDo Use display rotation API to get horizontal size */
+#if defined CONFIG_LV_DISPLAY_ORIENTATION_PORTRAIT
+    val = lv_disp_get_hor_res((lv_disp_t *) disp_drv);
+#endif
+#endif
+
+    return val;
+}
+
+static void sh1107_reset(void)
+{
+#if SH1107_USE_RST
+    gpio_set_level(SH1107_RST, 0);
+    vTaskDelay(100 / portTICK_RATE_MS);
+    gpio_set_level(SH1107_RST, 1);
+    vTaskDelay(100 / portTICK_RATE_MS);
+#endif
+}

lvgl_tft/sh1107.h

@@ -39,8 +39,8 @@ extern "C" {
 
 void sh1107_init(void);
 void sh1107_flush(lv_disp_drv_t * drv, const lv_area_t * area, lv_color_t * color_map);
-void sh1107_rounder(struct _disp_drv_t * disp_drv, lv_area_t *area);
-void sh1107_set_px_cb(struct _disp_drv_t * disp_drv, uint8_t * buf, lv_coord_t buf_w, lv_coord_t x, lv_coord_t y,
+void sh1107_rounder(lv_disp_drv_t * disp_drv, lv_area_t *area);
+void sh1107_set_px_cb(lv_disp_drv_t * disp_drv, uint8_t * buf, lv_coord_t buf_w, lv_coord_t x, lv_coord_t y,
     lv_color_t color, lv_opa_t opa);
 void sh1107_sleep_in(void);
 void sh1107_sleep_out(void);

lvgl_tft/ssd1306.c

@@ -22,8 +22,6 @@
 /*********************
  *      DEFINES
  *********************/
-#define TAG "SSD1306"
-
 #define OLED_I2C_PORT                       (CONFIG_LV_I2C_DISPLAY_PORT)
 // SLA (0x3C) + WRITE_MODE (0x00) =  0x78 (0b01111000)
 #define OLED_I2C_ADDRESS                    0x3C
@@ -106,7 +104,7 @@ void ssd1306_init(void)
     orientation_1 = 0xA0;
     orientation_2 = OLED_CMD_SET_COM_SCAN_MODE_NORMAL;
 #else
-    #error "Unsupported orientation"
+    assert(false); // Invalid configuration of SSD1306 driver
 #endif
 
     uint8_t display_mode = 0;

lvgl_tft/st7735s.c

@@ -9,7 +9,6 @@
 #include "st7735s.h"
 #include "disp_spi.h"
 #include "driver/gpio.h"
-#include "esp_log.h"
 #include "freertos/FreeRTOS.h"
 #include "freertos/task.h"
 
@@ -20,7 +19,6 @@
 /*********************
  *      DEFINES
  *********************/
- #define TAG "ST7735S"
  #define AXP192_I2C_ADDRESS                    0x34
 
 /**********************
@@ -41,10 +39,14 @@ static void st7735s_send_cmd(uint8_t cmd);
 static void st7735s_send_data(void * data, uint16_t length);
 static void st7735s_send_color(void * data, uint16_t length);
 static void st7735s_set_orientation(uint8_t orientation);
+static void st7735s_reset(void);
+
+#ifdef CONFIG_LV_M5STICKC_HANDLE_AXP192
 static void axp192_write_byte(uint8_t addr, uint8_t data);
 static void axp192_init();
 static void axp192_sleep_in();
 static void axp192_sleep_out();
+#endif
 
 /**********************
  *  STATIC VARIABLES
@@ -97,22 +99,9 @@ void st7735s_init(void)
 		{0, {0}, 0xff}
     };
 
-	//Initialize non-SPI GPIOs
-        gpio_pad_select_gpio(ST7735S_DC);
-	gpio_set_direction(ST7735S_DC, GPIO_MODE_OUTPUT);
+    st7735s_reset();
 
-#if ST7735S_USE_RST
-        gpio_pad_select_gpio(ST7735S_RST);
-	gpio_set_direction(ST7735S_RST, GPIO_MODE_OUTPUT);
-
-	//Reset the display
-	gpio_set_level(ST7735S_RST, 0);
-	vTaskDelay(100 / portTICK_RATE_MS);
-	gpio_set_level(ST7735S_RST, 1);
-	vTaskDelay(100 / portTICK_RATE_MS);
-#endif
-
-	ESP_LOGI(TAG, "ST7735S initialization.");
+	LV_LOG_INFO("ST7735S initialization.");
 
 	//Send all the commands
 	uint16_t cmd = 0;
@@ -136,7 +125,7 @@ void st7735s_init(void)
 
 void st7735s_flush(lv_disp_drv_t * drv, const lv_area_t * area, lv_color_t * color_map)
 {
-	uint8_t data[4];
+    uint8_t data[4] = {0};
 
     /*Column addresses*/
     st7735s_send_cmd(0x2A);
@@ -157,8 +146,8 @@ void st7735s_flush(lv_disp_drv_t * drv, const lv_area_t * area, lv_color_t * col
     /*Memory write*/
     st7735s_send_cmd(0x2C);
 
-	uint32_t size = lv_area_get_width(area) * lv_area_get_height(area);
-	st7735s_send_color((void*)color_map, size * 2);
+    uint32_t size = lv_area_get_width(area) * lv_area_get_height(area) * 2;
+    st7735s_send_color((void*)color_map, size);
 }
 
 void st7735s_sleep_in()
@@ -204,11 +193,7 @@ static void st7735s_send_color(void * data, uint16_t length)
 
 static void st7735s_set_orientation(uint8_t orientation)
 {
-    const char *orientation_str[] = {
-        "PORTRAIT", "PORTRAIT_INVERTED", "LANDSCAPE", "LANDSCAPE_INVERTED"
-    };
-
-    ESP_LOGD(TAG, "Display orientation: %s", orientation_str[orientation]);
+    assert(orientation < 4);
 
     /*
         Portrait:  0xC8 = ST77XX_MADCTL_MX | ST77XX_MADCTL_MY | ST77XX_MADCTL_BGR
@@ -217,41 +202,58 @@ static void st7735s_set_orientation(uint8_t orientation)
     */
     uint8_t data[] = {0xC8, 0xC8, 0xA8, 0xA8};
 
-    ESP_LOGD(TAG, "0x36 command value: 0x%02X", data[orientation]);
+#if (LV_USE_LOG == 1)
+    const char *orientation_str[] = {
+        "PORTRAIT", "PORTRAIT_INVERTED", "LANDSCAPE", "LANDSCAPE_INVERTED"
+    };
+
+    LV_LOG_INFO("Display orientation: %s", orientation_str[orientation]);
+    LV_LOG_INFO("0x36 command value: 0x%02X", data[orientation]);
+#endif
 
     st7735s_send_cmd(ST7735_MADCTL);
     st7735s_send_data((void *) &data[orientation], 1);
 }
 
+static void st7735s_reset(void)
+{
+#if ST7735S_USE_RST
+    gpio_set_level(ST7735S_RST, 0);
+    vTaskDelay(100 / portTICK_RATE_MS);
+    gpio_set_level(ST7735S_RST, 1);
+    vTaskDelay(100 / portTICK_RATE_MS);
+#endif
+}
+
 #ifdef CONFIG_LV_M5STICKC_HANDLE_AXP192
 
-    static void axp192_write_byte(uint8_t addr, uint8_t data)
-    {
+static void axp192_write_byte(uint8_t addr, uint8_t data)
+{
     err = lvgl_i2c_write(CONFIG_LV_I2C_DISPLAY_PORT, AXP192_I2C_ADDRESS, addr, &data, 1);
     if (ret != ESP_OK) {
-            ESP_LOGE(TAG, "AXP192 send failed. code: 0x%.2X", ret);
-        }
+        LV_LOG_ERROR("AXP192 send failed. code: 0x%.2X", ret);
     }
+}
 
-    static void axp192_init()
-    {
+static void axp192_init()
+{
     // information on how to init and use AXP192 ifor M5StickC taken from
     // 	https://forum.m5stack.com/topic/1025/m5stickc-turn-off-screen-completely
 
     axp192_write_byte(0x10, 0xFF);			// OLED_VPP Enable
     axp192_write_byte(0x28, 0xCC);			// Enable LDO2&LDO3, LED&TFT 3.0V
     axp192_sleep_out();
-        ESP_LOGI(TAG, "AXP192 initialized, power enabled for LDO2 and LDO3");
-    }
+    LV_LOG_INFO("AXP192 initialized, power enabled for LDO2 and LDO3");
+}
 
-    static void axp192_sleep_in()
-    {
+static void axp192_sleep_in()
+{
     axp192_write_byte(0x12, 0x4b);
-    }
+}
 
-    static void axp192_sleep_out()
-    {
+static void axp192_sleep_out()
+{
     axp192_write_byte(0x12, 0x4d);
-    }
+}
 
 #endif

lvgl_tft/st7789.c

@@ -4,21 +4,15 @@
  * Mostly taken from lbthomsen/esp-idf-littlevgl github.
  */
 
-#include "freertos/FreeRTOS.h"
-#include "freertos/task.h"
-#include "sdkconfig.h"
-
-#include "esp_log.h"
-
 #include "st7789.h"
 
 #include "disp_spi.h"
-#include "driver/gpio.h"
+#include "display_port.h"
 
 /*********************
  *      DEFINES
  *********************/
-#define TAG "st7789"
+
 /**********************
  *      TYPEDEFS
  **********************/
@@ -33,13 +27,18 @@ typedef struct {
 /**********************
  *  STATIC PROTOTYPES
  **********************/
-static void st7789_set_orientation(uint8_t orientation);
-
-static void st7789_send_color(void *data, size_t length);
+static void st7789_set_orientation(lv_disp_drv_t *drv, uint8_t orientation);
+static void st7789_send_cmd(lv_disp_drv_t * drv, uint8_t cmd);
+static void st7789_send_data(lv_disp_drv_t * drv, void *data, uint16_t length);
+static void st7789_send_color(lv_disp_drv_t * drv, void *data, uint16_t length);
+static void st7789_reset(lv_disp_drv_t * drv);
 
+static void setup_initial_offsets(void);
 /**********************
  *  STATIC VARIABLES
  **********************/
+static uint16_t user_x_offset = 0u;
+static uint16_t user_y_offset = 0u;
 
 /**********************
  *      MACROS
@@ -48,8 +47,10 @@ static void st7789_send_color(void *data, size_t length);
 /**********************
  *   GLOBAL FUNCTIONS
  **********************/
-void st7789_init(void)
+void st7789_init(lv_disp_drv_t *drv)
 {
+    setup_initial_offsets();
+
     lcd_init_cmd_t st7789_init_cmds[] = {
         {0xCF, {0x00, 0x83, 0X30}, 3},
         {0xED, {0x64, 0x03, 0X12, 0X81}, 4},
@@ -85,39 +86,21 @@ void st7789_init(void)
         {0, {0}, 0xff},
     };
 
-    //Initialize non-SPI GPIOs
-    gpio_pad_select_gpio(ST7789_DC);
-    gpio_set_direction(ST7789_DC, GPIO_MODE_OUTPUT);
-
-#if !defined(ST7789_SOFT_RST)
-    gpio_pad_select_gpio(ST7789_RST);
-    gpio_set_direction(ST7789_RST, GPIO_MODE_OUTPUT);
-#endif
-
-    //Reset the display
-#if !defined(ST7789_SOFT_RST)
-    gpio_set_level(ST7789_RST, 0);
-    vTaskDelay(100 / portTICK_RATE_MS);
-    gpio_set_level(ST7789_RST, 1);
-    vTaskDelay(100 / portTICK_RATE_MS);
-#else
-    st7789_send_cmd(ST7789_SWRESET);
-#endif
-
-    printf("ST7789 initialization.\n");
+    st7789_reset(drv);
 
     //Send all the commands
     uint16_t cmd = 0;
     while (st7789_init_cmds[cmd].databytes!=0xff) {
-        st7789_send_cmd(st7789_init_cmds[cmd].cmd);
-        st7789_send_data(st7789_init_cmds[cmd].data, st7789_init_cmds[cmd].databytes&0x1F);
+        st7789_send_cmd(drv, st7789_init_cmds[cmd].cmd);
+        st7789_send_data(drv, st7789_init_cmds[cmd].data, st7789_init_cmds[cmd].databytes&0x1F);
         if (st7789_init_cmds[cmd].databytes & 0x80) {
-                vTaskDelay(100 / portTICK_RATE_MS);
+            display_port_delay(drv, 100);
         }
         cmd++;
     }
 
-    st7789_set_orientation(CONFIG_LV_DISPLAY_ORIENTATION);
+    /* FIXME We're setting up the initial orientation in the cmd array */
+    st7789_set_orientation(drv, ST7789_INITIAL_ORIENTATION);
 }
 
 /* The ST7789 display controller can drive up to 320*240 displays, when using a 240*240 or 240*135
@@ -131,98 +114,94 @@ void st7789_flush(lv_disp_drv_t * drv, const lv_area_t * area, lv_color_t * colo
     uint16_t offsetx2 = area->x2;
     uint16_t offsety1 = area->y1;
     uint16_t offsety2 = area->y2;
+    uint32_t size = lv_area_get_width(area) * lv_area_get_height(area);
 
-#if (CONFIG_LV_TFT_DISPLAY_OFFSETS)
-    offsetx1 += CONFIG_LV_TFT_DISPLAY_X_OFFSET;
-    offsetx2 += CONFIG_LV_TFT_DISPLAY_X_OFFSET;
-    offsety1 += CONFIG_LV_TFT_DISPLAY_Y_OFFSET;
-    offsety2 += CONFIG_LV_TFT_DISPLAY_Y_OFFSET;
-
-#elif (LV_HOR_RES_MAX == 240) && (LV_VER_RES_MAX == 240)
-    #if (CONFIG_LV_DISPLAY_ORIENTATION_PORTRAIT)
-        offsetx1 += 80;
-        offsetx2 += 80;
-    #elif (CONFIG_LV_DISPLAY_ORIENTATION_LANDSCAPE_INVERTED)
-        offsety1 += 80;
-        offsety2 += 80;
-    #endif
-#elif (LV_HOR_RES_MAX == 240) && (LV_VER_RES_MAX == 135)
-    #if (CONFIG_LV_DISPLAY_ORIENTATION_PORTRAIT) || \
-        (CONFIG_LV_DISPLAY_ORIENTATION_PORTRAIT_INVERTED)
-        offsetx1 += 40;
-        offsetx2 += 40;
-        offsety1 += 53;
-        offsety2 += 53;
-    #endif
-#elif (LV_HOR_RES_MAX == 135) && (LV_VER_RES_MAX == 240)
-    #if (CONFIG_LV_DISPLAY_ORIENTATION_LANDSCAPE) || \
-        (CONFIG_LV_DISPLAY_ORIENTATION_LANDSCAPE_INVERTED)
-        offsetx1 += 52;
-        offsetx2 += 52;
-        offsety1 += 40;
-        offsety2 += 40;
-    #endif
-#endif
+    offsetx1 += st7789_x_offset();
+    offsetx2 += st7789_x_offset();
+    offsety1 += st7789_y_offset();
+    offsety2 += st7789_y_offset();
 
     /*Column addresses*/
-    st7789_send_cmd(ST7789_CASET);
+    st7789_send_cmd(drv, ST7789_CASET);
     data[0] = (offsetx1 >> 8) & 0xFF;
     data[1] = offsetx1 & 0xFF;
     data[2] = (offsetx2 >> 8) & 0xFF;
     data[3] = offsetx2 & 0xFF;
-    st7789_send_data(data, 4);
+    st7789_send_data(drv, data, 4);
 
     /*Page addresses*/
-    st7789_send_cmd(ST7789_RASET);
+    st7789_send_cmd(drv, ST7789_RASET);
     data[0] = (offsety1 >> 8) & 0xFF;
     data[1] = offsety1 & 0xFF;
     data[2] = (offsety2 >> 8) & 0xFF;
     data[3] = offsety2 & 0xFF;
-    st7789_send_data(data, 4);
+    st7789_send_data(drv, data, 4);
 
     /*Memory write*/
-    st7789_send_cmd(ST7789_RAMWR);
+    st7789_send_cmd(drv, ST7789_RAMWR);
+    st7789_send_color(drv, (void*) color_map, size * 2);
+}
 
-    size_t size = (size_t)lv_area_get_width(area) * (size_t)lv_area_get_height(area);
+void st7789_set_x_offset(const uint16_t offset)
+{
+    user_x_offset = offset;
+}
 
-    st7789_send_color((void*)color_map, size * 2);
+void st7789_set_y_offset(const uint16_t offset)
+{
+    user_y_offset = offset;
+}
 
+uint16_t st7789_x_offset(void)
+{
+    return user_x_offset;
+}
+
+uint16_t st7789_y_offset(void)
+{
+    return user_y_offset;
 }
 
 /**********************
  *   STATIC FUNCTIONS
  **********************/
-void st7789_send_cmd(uint8_t cmd)
+static void st7789_send_cmd(lv_disp_drv_t *drv, uint8_t cmd)
 {
     disp_wait_for_pending_transactions();
-    gpio_set_level(ST7789_DC, 0);
+    display_port_gpio_dc(drv, 0);
     disp_spi_send_data(&cmd, 1);
 }
 
-void st7789_send_data(void * data, uint16_t length)
+static void st7789_send_data(lv_disp_drv_t *drv, void * data, uint16_t length)
 {
     disp_wait_for_pending_transactions();
-    gpio_set_level(ST7789_DC, 1);
+    display_port_gpio_dc(drv, 1);
     disp_spi_send_data(data, length);
 }
 
-static void st7789_send_color(void * data, size_t length)
+static void st7789_send_color(lv_disp_drv_t *drv, void * data, uint16_t length)
 {
     disp_wait_for_pending_transactions();
-    gpio_set_level(ST7789_DC, 1);
+    display_port_gpio_dc(drv, 1);
     disp_spi_send_colors(data, length);
 }
 
-static void st7789_set_orientation(uint8_t orientation)
+/* Reset the display, if we don't have a reset pin we use software reset */
+static void st7789_reset(lv_disp_drv_t *drv)
 {
-    // ESP_ASSERT(orientation < 4);
-
-    const char *orientation_str[] = {
-        "PORTRAIT", "PORTRAIT_INVERTED", "LANDSCAPE", "LANDSCAPE_INVERTED"
-    };
-
-    ESP_LOGI(TAG, "Display orientation: %s", orientation_str[orientation]);
+#if !defined(ST7789_SOFT_RST)
+    display_port_gpio_rst(drv, 0);
+    display_port_delay(drv, 100);
+    display_port_gpio_rst(drv, 1);
+    display_port_delay(drv, 100);
+#else
+    st7789_send_cmd(drv, ST7789_SWRESET);
+    display_port_delay(drv, 5);
+#endif
+}
 
+static void st7789_set_orientation(lv_disp_drv_t *drv, uint8_t orientation)
+{
     uint8_t data[] =
     {
 #if CONFIG_LV_PREDEFINED_DISPLAY_TTGO
@@ -232,8 +211,42 @@ static void st7789_set_orientation(uint8_t orientation)
 #endif
     };
 
-    ESP_LOGI(TAG, "0x36 command value: 0x%02X", data[orientation]);
-
-    st7789_send_cmd(ST7789_MADCTL);
-    st7789_send_data((void *) &data[orientation], 1);
+    st7789_send_cmd(drv, ST7789_MADCTL);
+    st7789_send_data(drv, (void *) &data[orientation], 1);
+}
+
+static void setup_initial_offsets(void)
+{
+#if (CONFIG_LV_TFT_DISPLAY_OFFSETS)
+    st7789_set_x_offset(CONFIG_LV_TFT_DISPLAY_X_OFFSET);
+    st7789_set_y_offset(CONFIG_LV_TFT_DISPLAY_Y_OFFSET);
+
+#elif (LV_HOR_RES_MAX == 240) && (LV_VER_RES_MAX == 240)
+    #if (CONFIG_LV_DISPLAY_ORIENTATION_PORTRAIT)
+        st7789_set_x_offset(80);
+        st7789_set_y_offset(0);
+    #elif (CONFIG_LV_DISPLAY_ORIENTATION_LANDSCAPE_INVERTED)
+        st7789_set_x_offset(0);
+        st7789_set_y_offset(80);
+    #endif
+#elif (LV_HOR_RES_MAX == 240) && (LV_VER_RES_MAX == 135)
+    #if (CONFIG_LV_DISPLAY_ORIENTATION_PORTRAIT) || \
+        (CONFIG_LV_DISPLAY_ORIENTATION_PORTRAIT_INVERTED)
+        st7789_set_x_offset(40);
+        st7789_set_y_offset(53);
+    #endif
+#elif (LV_HOR_RES_MAX == 135) && (LV_VER_RES_MAX == 240)
+    #if (CONFIG_LV_DISPLAY_ORIENTATION_LANDSCAPE) || \
+        (CONFIG_LV_DISPLAY_ORIENTATION_LANDSCAPE_INVERTED)
+        st7789_set_x_offset(52);
+        st7789_set_y_offset(40);
+    #endif
+#endif
+}
+
+/* Display update callback, we could update the orientation in here
+ * NOTE Available only for LVGL v8 */
+void st7789_update_cb(lv_disp_drv_t *drv)
+{
+    (void) drv;
 }

lvgl_tft/st7789.h

@@ -17,22 +17,11 @@ extern "C"
 #else
 #include "lvgl/lvgl.h"
 #endif
-#include "../lvgl_helpers.h"
 
-#include "sdkconfig.h"
-
-#define ST7789_DC       CONFIG_LV_DISP_PIN_DC
-#define ST7789_RST      CONFIG_LV_DISP_PIN_RST
-
-#if CONFIG_LV_DISP_USE_RST
-  #if CONFIG_LV_DISP_ST7789_SOFT_RESET
-    #define ST7789_SOFT_RST
-  #endif
-#else
-  #define ST7789_SOFT_RST
-#endif
-
-#define ST7789_INVERT_COLORS            CONFIG_LV_INVERT_COLORS
+/* For SPI transfers */
+#include "lvgl_helpers.h"
+/* For ST7789 particular configurations */
+#include "display_config.h"
 
 /* ST7789 commands */
 #define ST7789_NOP      0x00
@@ -110,11 +99,48 @@ extern "C"
 #define ST7789_NVMSET       0xFC    // NVM setting
 #define ST7789_PROMACT      0xFE    // Program action
 
-void st7789_init(void);
+/**
+ * Initialize the ST7789 display controller with default configuration
+ *
+ * @param drv Pointer to lv_disp_drv_t being used
+ */
+void st7789_init(lv_disp_drv_t *drv);
+
+/**
+ * Send buffer content to display  
+ *
+ * @param drv Pointer to lv_disp_drv_t being used
+ * @param area Pointer to area to be sent
+ * @param color_map Pointer to color map
+ */
 void st7789_flush(lv_disp_drv_t *drv, const lv_area_t *area, lv_color_t *color_map);
 
-void st7789_send_cmd(uint8_t cmd);
-void st7789_send_data(void *data, uint16_t length);
+/**
+ * Set display buffer offset at x axis
+ */
+void st7789_set_x_offset(const uint16_t offset);
+
+/**
+ * Set display buffer offset at y axis
+ */
+void st7789_set_y_offset(const uint16_t offset);
+
+/**
+ * Get display buffer offset at x axis
+ */
+uint16_t st7789_x_offset(void);
+
+/**
+ * Get display buffer offset at y axis
+ */
+uint16_t st7789_y_offset(void);
+
+/**
+ * Display updated callback
+ *
+ * @param drv Pointer to lv_disp_drv_t being used
+ */
+void st7789_update_cb(lv_disp_drv_t *drv);
 
 #ifdef __cplusplus
 } /* extern "C" */

lvgl_tft/st7796s.c

@@ -9,14 +9,12 @@
 #include "st7796s.h"
 #include "disp_spi.h"
 #include "driver/gpio.h"
-#include "esp_log.h"
 #include "freertos/FreeRTOS.h"
 #include "freertos/task.h"
 
 /*********************
  *      DEFINES
  *********************/
-#define TAG "ST7796S"
 
 /**********************
  *      TYPEDEFS
@@ -38,6 +36,7 @@ static void st7796s_set_orientation(uint8_t orientation);
 static void st7796s_send_cmd(uint8_t cmd);
 static void st7796s_send_data(void *data, uint16_t length);
 static void st7796s_send_color(void *data, uint16_t length);
+static void st7796s_reset(void);
 
 /**********************
  *  STATIC VARIABLES
@@ -81,22 +80,9 @@ void st7796s_init(void)
 		{0, {0}, 0xff},
 	};
 
-	//Initialize non-SPI GPIOs
-	gpio_pad_select_gpio(ST7796S_DC);
-	gpio_set_direction(ST7796S_DC, GPIO_MODE_OUTPUT);
+    st7796s_reset();
 
-#if ST7796S_USE_RST
-	gpio_pad_select_gpio(ST7796S_RST);
-	gpio_set_direction(ST7796S_RST, GPIO_MODE_OUTPUT);
-
-	//Reset the display
-	gpio_set_level(ST7796S_RST, 0);
-	vTaskDelay(100 / portTICK_RATE_MS);
-	gpio_set_level(ST7796S_RST, 1);
-	vTaskDelay(100 / portTICK_RATE_MS);
-#endif
-
-	ESP_LOGI(TAG, "Initialization.");
+    LV_LOG_INFO("Initialization.");
 
     //Send all the commands
     uint16_t cmd = 0;
@@ -189,25 +175,36 @@ static void st7796s_send_color(void *data, uint16_t length)
 
 static void st7796s_set_orientation(uint8_t orientation)
 {
-	// ESP_ASSERT(orientation < 4);
+	assert(orientation < 4);
 
+#if defined CONFIG_LV_PREDEFINED_DISPLAY_M5STACK
+	const uint8_t data[] = {0x68, 0x68, 0x08, 0x08};
+#elif defined(CONFIG_LV_PREDEFINED_DISPLAY_WROVER4)
+	const uint8_t data[] = {0x4C, 0x88, 0x28, 0xE8};
+#elif defined(CONFIG_LV_PREDEFINED_DISPLAY_WT32_SC01)
+	const uint8_t data[] = {0x48, 0x88, 0x28, 0xE8};
+#else
+	const uint8_t data[] = {0x48, 0x88, 0x28, 0xE8};
+#endif
+
+#if (LV_USE_LOG == 1)
 	const char *orientation_str[] = {
 		"PORTRAIT", "PORTRAIT_INVERTED", "LANDSCAPE", "LANDSCAPE_INVERTED"};
 
-	ESP_LOGI(TAG, "Display orientation: %s", orientation_str[orientation]);
-
-#if defined CONFIG_LV_PREDEFINED_DISPLAY_M5STACK
-	uint8_t data[] = {0x68, 0x68, 0x08, 0x08};
-#elif defined(CONFIG_LV_PREDEFINED_DISPLAY_WROVER4)
-	uint8_t data[] = {0x4C, 0x88, 0x28, 0xE8};
-#elif defined(CONFIG_LV_PREDEFINED_DISPLAY_WT32_SC01)
-	uint8_t data[] = {0x48, 0x88, 0x28, 0xE8};
-#elif defined(CONFIG_LV_PREDEFINED_DISPLAY_NONE)
-	uint8_t data[] = {0x48, 0x88, 0x28, 0xE8};
+	LV_LOG_INFO("Display orientation: %s", orientation_str[orientation]);
+	LV_LOG_INFO("0x36 command value: 0x%02X", data[orientation]);
 #endif
 
-	ESP_LOGI(TAG, "0x36 command value: 0x%02X", data[orientation]);
-
 	st7796s_send_cmd(0x36);
 	st7796s_send_data((void *)&data[orientation], 1);
 }
+
+static void st7796s_reset(void)
+{
+#if ST7796S_USE_RST
+    gpio_set_level(ST7796S_RST, 0);
+    vTaskDelay(100 / portTICK_RATE_MS);
+    gpio_set_level(ST7796S_RST, 1);
+    vTaskDelay(100 / portTICK_RATE_MS);
+#endif
+}

lvgl_tft/uc8151d.c

@@ -29,23 +29,37 @@
 #include <freertos/task.h>
 #include <freertos/event_groups.h>
 #include <driver/gpio.h>
-#include <esp_log.h>
 
 #include "disp_spi.h"
 #include "disp_driver.h"
 #include "uc8151d.h"
 
-#define TAG "lv_uc8151d"
-
 #define PIN_DC              CONFIG_LV_DISP_PIN_DC
 #define PIN_DC_BIT          ((1ULL << (uint8_t)(CONFIG_LV_DISP_PIN_DC)))
+
+#if defined CONFIG_LV_DISP_PIN_RST
 #define PIN_RST             CONFIG_LV_DISP_PIN_RST
 #define PIN_RST_BIT         ((1ULL << (uint8_t)(CONFIG_LV_DISP_PIN_RST)))
+#endif
+
 #define PIN_BUSY            CONFIG_LV_DISP_PIN_BUSY
 #define PIN_BUSY_BIT        ((1ULL << (uint8_t)(CONFIG_LV_DISP_PIN_BUSY)))
 #define EVT_BUSY            (1UL << 0UL)
+
+#if defined (LV_HOR_RES_MAX)
 #define EPD_WIDTH           LV_HOR_RES_MAX
+#else
+    /* ToDo Fix, 256 is just a magic number */
+#define EPD_WIDTH           256u
+#endif
+
+#if defined (LV_VER_RES_MAX)
 #define EPD_HEIGHT          LV_VER_RES_MAX
+#else
+    /* ToDo Fix, 128 is just a magic number */
+#define EPD_HEIGHT          128u
+#endif
+
 #define EPD_ROW_LEN         (EPD_HEIGHT / 8u)
 
 #define BIT_SET(a, b)       ((a) |= (1U << (b)))
@@ -93,26 +107,6 @@ static void uc8151d_spi_send_data_byte(uint8_t data)
     disp_spi_send_data(&data, 1);
 }
 
-static void uc8151d_spi_send_fb(uint8_t *data, size_t len)
-{
-    disp_wait_for_pending_transactions();
-    gpio_set_level(PIN_DC, 1);   // DC = 1 for data
-    disp_spi_send_colors(data, len);
-}
-
-static void uc8151d_spi_send_seq(const uc8151d_seq_t *seq, size_t len)
-{
-    ESP_LOGD(TAG, "Writing cmd/data sequence, count %u", len);
-
-    if (!seq || len < 1) return;
-    for (size_t cmd_idx = 0; cmd_idx < len; cmd_idx++) {
-        uc8151d_spi_send_cmd(seq[cmd_idx].cmd);
-        if (seq[cmd_idx].len > 0) {
-            uc8151d_spi_send_data((uint8_t *) seq[cmd_idx].data, seq[cmd_idx].len);
-        }
-    }
-}
-
 static esp_err_t uc8151d_wait_busy(uint32_t timeout_ms)
 {
     uint32_t wait_ticks = (timeout_ms == 0 ? portMAX_DELAY : pdMS_TO_TICKS(timeout_ms));
@@ -124,7 +118,7 @@ static esp_err_t uc8151d_wait_busy(uint32_t timeout_ms)
     return ((bits & EVT_BUSY) != 0) ? ESP_OK : ESP_ERR_TIMEOUT;
 }
 
-static void uc8151d_sleep()
+static void uc8151d_sleep(void)
 {
     // Set VCOM to 0xf7
     uc8151d_spi_send_cmd(0x50);
@@ -139,14 +133,13 @@ static void uc8151d_sleep()
     uc8151d_spi_send_data_byte(0xa5);
 }
 
-static void uc8151d_panel_init()
+static void uc8151d_reset(void);
+
+static void uc8151d_panel_init(void)
 {
     // Hardware reset for 3 times - not sure why but it's from official demo code
     for (uint8_t cnt = 0; cnt < 3; cnt++) {
-        gpio_set_level(PIN_RST, 0);
-        vTaskDelay(pdMS_TO_TICKS(10)); // At least 10ms, leave 20ms for now just in case...
-        gpio_set_level(PIN_RST, 1);
-        vTaskDelay(pdMS_TO_TICKS(10));
+        uc8151d_reset();
     }
 
     // Power up
@@ -196,19 +189,20 @@ static void uc8151d_full_update(uint8_t *buf)
 
 void uc8151d_lv_fb_flush(lv_disp_drv_t *drv, const lv_area_t *area, lv_color_t *color_map)
 {
+#if LV_USE_LOG
     size_t len = ((area->x2 - area->x1 + 1) * (area->y2 - area->y1 + 1)) / 8;
-
-    ESP_LOGD(TAG, "x1: 0x%x, x2: 0x%x, y1: 0x%x, y2: 0x%x", area->x1, area->x2, area->y1, area->y2);
-    ESP_LOGD(TAG, "Writing LVGL fb with len: %u", len);
+    LV_LOG_INFO("x1: 0x%x, x2: 0x%x, y1: 0x%x, y2: 0x%x", area->x1, area->x2, area->y1, area->y2);
+    LV_LOG_INFO("Writing LVGL fb with len: %u", len);
+#endif
 
     uint8_t *buf = (uint8_t *) color_map;
     uc8151d_full_update(buf);
 
     lv_disp_flush_ready(drv);
-    ESP_LOGD(TAG, "Ready");
+    LV_LOG_INFO("Ready");
 }
 
-void uc8151d_lv_set_fb_cb(struct _disp_drv_t *disp_drv, uint8_t *buf, lv_coord_t buf_w, lv_coord_t x, lv_coord_t y,
+void uc8151d_lv_set_fb_cb(lv_disp_drv_t *disp_drv, uint8_t *buf, lv_coord_t buf_w, lv_coord_t x, lv_coord_t y,
                            lv_color_t color, lv_opa_t opa)
 {
     uint16_t byte_index = (x >> 3u) + (y * EPD_ROW_LEN);
@@ -217,12 +211,12 @@ void uc8151d_lv_set_fb_cb(struct _disp_drv_t *disp_drv, uint8_t *buf, lv_coord_t
     if (color.full) {
         BIT_SET(buf[byte_index], 7 - bit_index);
     } else {
-        ESP_LOGD(TAG, "Clear at x: %u, y: %u", x, y);
+        LV_LOG_INFO("Clear at x: %u, y: %u", x, y);
         BIT_CLEAR(buf[byte_index], 7 - bit_index);
     }
 }
 
-void uc8151d_lv_rounder_cb(struct _disp_drv_t *disp_drv, lv_area_t *area)
+void uc8151d_lv_rounder_cb(lv_disp_drv_t *disp_drv, lv_area_t *area)
 {
     // Always send full framebuffer if it's not in partial mode
     area->x1 = 0;
@@ -231,25 +225,15 @@ void uc8151d_lv_rounder_cb(struct _disp_drv_t *disp_drv, lv_area_t *area)
     area->y2 = EPD_HEIGHT - 1;
 }
 
-void uc8151d_init()
+void uc8151d_init(void)
 {
     // Initialise event group
     uc8151d_evts = xEventGroupCreate();
     if (!uc8151d_evts) {
-        ESP_LOGE(TAG, "Failed when initialising event group!");
+        LV_LOG_ERROR("Failed when initialising event group!");
         return;
     }
 
-    // Setup output pins, output (PP)
-    gpio_config_t out_io_conf = {
-            .intr_type = GPIO_INTR_DISABLE,
-            .mode = GPIO_MODE_OUTPUT,
-            .pin_bit_mask = PIN_DC_BIT | PIN_RST_BIT,
-            .pull_down_en = 0,
-            .pull_up_en = 0,
-    };
-    ESP_ERROR_CHECK(gpio_config(&out_io_conf));
-
     // Setup input pin, pull-up, input
     gpio_config_t in_io_conf = {
             .intr_type = GPIO_INTR_POSEDGE,
@@ -262,7 +246,18 @@ void uc8151d_init()
     gpio_install_isr_service(0);
     gpio_isr_handler_add(PIN_BUSY, uc8151d_busy_intr, (void *) PIN_BUSY);
 
-    ESP_LOGI(TAG, "IO init finished");
+    LV_LOG_INFO("IO init finished");
     uc8151d_panel_init();
-    ESP_LOGI(TAG, "Panel initialised");
+    LV_LOG_INFO("Panel initialised");
+}
+
+static void uc8151d_reset(void)
+{
+#if defined CONFIG_LV_DISP_USE_RST
+    gpio_set_level(PIN_RST, 0);
+    // At least 10ms, leave 20ms for now just in case...
+    vTaskDelay(pdMS_TO_TICKS(20));
+    gpio_set_level(PIN_RST, 1);
+    vTaskDelay(pdMS_TO_TICKS(10));
+#endif
 }

lvgl_tft/uc8151d.h

@@ -29,11 +29,11 @@
 
 #include <lvgl.h>
 
-void uc8151d_init();
-void uc8151d_lv_set_fb_cb(struct _disp_drv_t *disp_drv, uint8_t *buf, lv_coord_t buf_w, lv_coord_t x, lv_coord_t y,
+void uc8151d_init(void);
+void uc8151d_lv_set_fb_cb(lv_disp_drv_t *disp_drv, uint8_t *buf, lv_coord_t buf_w, lv_coord_t x, lv_coord_t y,
                           lv_color_t color, lv_opa_t opa);
 
-void uc8151d_lv_rounder_cb(struct _disp_drv_t *disp_drv, lv_area_t *area);
+void uc8151d_lv_rounder_cb(lv_disp_drv_t *disp_drv, lv_area_t *area);
 void uc8151d_lv_fb_flush(lv_disp_drv_t *drv, const lv_area_t *area, lv_color_t *color_map);
 
 #endif //LVGL_DEMO_UC8151D_H

lvgl_touch/adcraw.c

@@ -12,7 +12,6 @@
 
 #if CONFIG_LV_TOUCH_CONTROLLER_ADCRAW
 
-#define TAG "ADCRAW"
 #define CALIBRATIONINSET 1 // range 0 <= CALIBRATIONINSET <= 40
 #define SAMPLE_CALIBRATION_POINTS 4
 // use this scale factor to avoid working in floating point numbers

lvgl_touch/ft6x36.c

@@ -18,22 +18,24 @@
 * SOFTWARE.
 */
 
-#include <esp_log.h>
 #ifdef LV_LVGL_H_INCLUDE_SIMPLE
 #include <lvgl.h>
 #else
 #include <lvgl/lvgl.h>
 #endif
+
 #include "ft6x36.h"
 #include "lvgl_i2c/i2c_manager.h"
 
 #define TAG "FT6X36"
 #define FT6X36_TOUCH_QUEUE_ELEMENTS 1
 
-
 static ft6x36_status_t ft6x36_status;
-static uint8_t current_dev_addr;       // set during init
-static ft6x36_touch_t touch_inputs = { -1, -1, LV_INDEV_STATE_REL };    // -1 coordinates to designate it was never touched
+/* Set during initialization */
+static uint8_t current_dev_addr;
+/* -1 coordinates to designate it was never touched */
+static ft6x36_touch_t touch_inputs = { -1, -1, LV_INDEV_STATE_REL };
+
 #if CONFIG_LV_FT6X36_COORDINATES_QUEUE
 QueueHandle_t ft6x36_touch_queue_handle;
 #endif
@@ -49,13 +51,13 @@ static esp_err_t ft6x06_i2c_read8(uint8_t slave_addr, uint8_t register_addr, uin
   */
 uint8_t ft6x36_get_gesture_id() {
     if (!ft6x36_status.inited) {
-        ESP_LOGE(TAG, "Init first!");
+        LV_LOG_ERROR("Init first!");
         return 0x00;
     }
     uint8_t data_buf;
     esp_err_t ret;
     if ((ret = ft6x06_i2c_read8(current_dev_addr, FT6X36_GEST_ID_REG, &data_buf) != ESP_OK))
-        ESP_LOGE(TAG, "Error reading from device: %s", esp_err_to_name(ret));
+        LV_LOG_ERROR("Error reading from device: %s", esp_err_to_name(ret));
     return data_buf;
 }
 
@@ -70,29 +72,29 @@ void ft6x06_init(uint16_t dev_addr) {
     current_dev_addr = dev_addr;
     uint8_t data_buf;
     esp_err_t ret;
-    ESP_LOGI(TAG, "Found touch panel controller");
+    LV_LOG_INFO("Found touch panel controller");
     if ((ret = ft6x06_i2c_read8(dev_addr, FT6X36_PANEL_ID_REG, &data_buf) != ESP_OK))
-        ESP_LOGE(TAG, "Error reading from device: %s",
+        LV_LOG_ERROR("Error reading from device: %s",
                  esp_err_to_name(ret));    // Only show error the first time
-    ESP_LOGI(TAG, "\tDevice ID: 0x%02x", data_buf);
+    LV_LOG_INFO("\tDevice ID: 0x%02x", data_buf);
 
     ft6x06_i2c_read8(dev_addr, FT6X36_CHIPSELECT_REG, &data_buf);
-    ESP_LOGI(TAG, "\tChip ID: 0x%02x", data_buf);
+    LV_LOG_INFO("\tChip ID: 0x%02x", data_buf);
 
     ft6x06_i2c_read8(dev_addr, FT6X36_DEV_MODE_REG, &data_buf);
-    ESP_LOGI(TAG, "\tDevice mode: 0x%02x", data_buf);
+    LV_LOG_INFO("\tDevice mode: 0x%02x", data_buf);
 
     ft6x06_i2c_read8(dev_addr, FT6X36_FIRMWARE_ID_REG, &data_buf);
-    ESP_LOGI(TAG, "\tFirmware ID: 0x%02x", data_buf);
+    LV_LOG_INFO("\tFirmware ID: 0x%02x", data_buf);
 
     ft6x06_i2c_read8(dev_addr, FT6X36_RELEASECODE_REG, &data_buf);
-    ESP_LOGI(TAG, "\tRelease code: 0x%02x", data_buf);
+    LV_LOG_INFO("\tRelease code: 0x%02x", data_buf);
 
 #if CONFIG_LV_FT6X36_COORDINATES_QUEUE
     ft6x36_touch_queue_handle = xQueueCreate( FT6X36_TOUCH_QUEUE_ELEMENTS, sizeof( ft6x36_touch_t ) );
     if( ft6x36_touch_queue_handle == NULL )
     {
-        ESP_LOGE( TAG, "\tError creating touch input FreeRTOS queue" );
+        LV_LOG_ERROR("\tError creating touch input FreeRTOS queue" );
         return;
     }
     xQueueSend( ft6x36_touch_queue_handle, &touch_inputs, 0 );
@@ -107,14 +109,14 @@ void ft6x06_init(uint16_t dev_addr) {
   */
 bool ft6x36_read(lv_indev_drv_t *drv, lv_indev_data_t *data) {
     if (!ft6x36_status.inited) {
-        ESP_LOGE(TAG, "Init first!");
+        LV_LOG_ERROR("Init first!");
         return 0x00;
     }
     uint8_t data_buf[5];        // 1 byte status, 2 bytes X, 2 bytes Y
 
     esp_err_t ret = lvgl_i2c_read(CONFIG_LV_I2C_TOUCH_PORT, current_dev_addr, FT6X36_TD_STAT_REG, &data_buf[0], 5);
     if (ret != ESP_OK) {
-        ESP_LOGE(TAG, "Error talking to touch IC: %s", esp_err_to_name(ret));
+        LV_LOG_ERROR("Error talking to touch IC: %s", esp_err_to_name(ret));
     }
     uint8_t touch_pnt_cnt = data_buf[0];  // Number of detected touch points
 
@@ -150,7 +152,7 @@ bool ft6x36_read(lv_indev_drv_t *drv, lv_indev_data_t *data) {
     data->point.x = touch_inputs.last_x;
     data->point.y = touch_inputs.last_y;
     data->state = touch_inputs.current_state;
-    ESP_LOGD(TAG, "X=%u Y=%u", data->point.x, data->point.y);
+    LV_LOG_INFO("X=%u Y=%u", data->point.x, data->point.y);
 
 #if CONFIG_LV_FT6X36_COORDINATES_QUEUE
     xQueueOverwrite( ft6x36_touch_queue_handle, &touch_inputs );

lvgl_touch/gt911.c

@@ -18,7 +18,6 @@
 * SOFTWARE.
 */
 
-#include <esp_log.h>
 #ifdef LV_LVGL_H_INCLUDE_SIMPLE
 #include <lvgl.h>
 #else
@@ -28,8 +27,6 @@
 
 #include "lvgl_i2c/i2c_manager.h"
 
-#define TAG "GT911"
-
 gt911_status_t gt911_status;
 
 //TODO: handle multibyte read and refactor to just one read transaction
@@ -53,9 +50,9 @@ void gt911_init(uint8_t dev_addr) {
         uint8_t data_buf;
         esp_err_t ret;
 
-        ESP_LOGI(TAG, "Checking for GT911 Touch Controller");
+        LV_LOG_INFO("Checking for GT911 Touch Controller");
         if ((ret = gt911_i2c_read(dev_addr, GT911_PRODUCT_ID1, &data_buf, 1) != ESP_OK)) {
-            ESP_LOGE(TAG, "Error reading from device: %s",
+            LV_LOG_ERROR("Error reading from device: %s",
                         esp_err_to_name(ret));    // Only show error the first time
             return;
         }
@@ -64,22 +61,22 @@ void gt911_init(uint8_t dev_addr) {
         for (int i = 0; i < GT911_PRODUCT_ID_LEN; i++) {
             gt911_i2c_read(dev_addr, (GT911_PRODUCT_ID1 + i), (uint8_t *)&(gt911_status.product_id[i]), 1);
         }
-        ESP_LOGI(TAG, "\tProduct ID: %s", gt911_status.product_id);
+        LV_LOG_INFO("\tProduct ID: %s", gt911_status.product_id);
 
         gt911_i2c_read(dev_addr, GT911_VENDOR_ID, &data_buf, 1);
-        ESP_LOGI(TAG, "\tVendor ID: 0x%02x", data_buf);
+        LV_LOG_INFO("\tVendor ID: 0x%02x", data_buf);
 
         gt911_i2c_read(dev_addr, GT911_X_COORD_RES_L, &data_buf, 1);
         gt911_status.max_x_coord = data_buf;
         gt911_i2c_read(dev_addr, GT911_X_COORD_RES_H, &data_buf, 1);
         gt911_status.max_x_coord |= ((uint16_t)data_buf << 8);
-        ESP_LOGI(TAG, "\tX Resolution: %d", gt911_status.max_x_coord);
+        LV_LOG_INFO("\tX Resolution: %d", gt911_status.max_x_coord);
 
         gt911_i2c_read(dev_addr, GT911_Y_COORD_RES_L, &data_buf, 1);
         gt911_status.max_y_coord = data_buf;
         gt911_i2c_read(dev_addr, GT911_Y_COORD_RES_H, &data_buf, 1);
         gt911_status.max_y_coord |= ((uint16_t)data_buf << 8);
-        ESP_LOGI(TAG, "\tY Resolution: %d", gt911_status.max_y_coord);
+        LV_LOG_INFO("\tY Resolution: %d", gt911_status.max_y_coord);
         gt911_status.inited = true;
     }
 }
@@ -98,7 +95,7 @@ bool gt911_read(lv_indev_drv_t *drv, lv_indev_data_t *data) {
     uint8_t status_reg;
 
     gt911_i2c_read(gt911_status.i2c_dev_addr, GT911_STATUS_REG, &status_reg, 1);
-//    ESP_LOGI(TAG, "\tstatus: 0x%02x", status_reg);
+//    LV_LOG_INFO("\tstatus: 0x%02x", status_reg);
     touch_pnt_cnt = status_reg & 0x0F;
     if ((status_reg & 0x80) || (touch_pnt_cnt < 6)) {
         //Reset Status Reg Value
@@ -112,7 +109,7 @@ bool gt911_read(lv_indev_drv_t *drv, lv_indev_data_t *data) {
     }
 
 //    gt911_i2c_read(gt911_status.i2c_dev_addr, GT911_TRACK_ID1, &data_buf, 1);
-//    ESP_LOGI(TAG, "\ttrack_id: %d", data_buf);
+//    LV_LOG_INFO("\ttrack_id: %d", data_buf);
 
     gt911_i2c_read(gt911_status.i2c_dev_addr, GT911_PT1_X_COORD_L, &data_buf, 1);
     last_x = data_buf;
@@ -138,7 +135,7 @@ bool gt911_read(lv_indev_drv_t *drv, lv_indev_data_t *data) {
     data->point.x = last_x;
     data->point.y = last_y;
     data->state = LV_INDEV_STATE_PR;
-    ESP_LOGI(TAG, "X=%u Y=%u", data->point.x, data->point.y);
-    ESP_LOGV(TAG, "X=%u Y=%u", data->point.x, data->point.y);
+    LV_LOG_INFO("X=%u Y=%u", data->point.x, data->point.y);
+    LV_LOG_INFO("X=%u Y=%u", data->point.x, data->point.y);
     return false;
 }

lvgl_touch/ra8875_touch.c

@@ -5,7 +5,6 @@
 /*********************
  *      INCLUDES
  *********************/
-#include "esp_log.h"
 #include "freertos/FreeRTOS.h"
 #include "freertos/task.h"
 
@@ -23,7 +22,6 @@
  *      DEFINES
  *********************/
 #define DEBUG false
-#define TAG "RA8875-Touch"
 
 #define DIV_ROUND_UP(n, d) (((n)+(d)-1)/(d))
 
@@ -83,7 +81,7 @@ void ra8875_touch_init(void)
     };
     #define INIT_CMDS_SIZE (sizeof(init_cmds)/sizeof(init_cmds[0]))
 
-    ESP_LOGI(TAG, "Initializing RA8875 Touch...");
+    LV_LOG_INFO("Initializing RA8875 Touch...");
 
     // Send all the commands
     for (unsigned int i = 0; i < INIT_CMDS_SIZE; i++) {
@@ -94,7 +92,7 @@ void ra8875_touch_init(void)
 
 void ra8875_touch_enable(bool enable)
 {
-    ESP_LOGI(TAG, "%s touch.", enable ? "Enabling" : "Disabling");
+    LV_LOG_INFO("%s touch.", enable ? "Enabling" : "Disabling");
     uint8_t val = enable ? (0x80 | TPCR0_VAL) : (TPCR0_VAL);
     ra8875_write_cmd(RA8875_REG_TPCR0, val);
 }
@@ -122,7 +120,7 @@ bool ra8875_touch_read(lv_indev_drv_t * drv, lv_indev_data_t * data)
         y = (y << 2) | ((xy >> 2) & 0x03);
 
 #if DEBUG
-        ESP_LOGI(TAG, "Touch Poll Raw: %d,%d", x, y);
+        LV_LOG_INFO("Touch Poll Raw: %d,%d", x, y);
 #endif
 
         // Convert to display coordinates
@@ -136,7 +134,7 @@ bool ra8875_touch_read(lv_indev_drv_t * drv, lv_indev_data_t * data)
     data->point.y = y;
 
 #if DEBUG
-        ESP_LOGI(TAG, "Touch Poll - Event: %d; %d,%d", data->state, data->point.x, data->point.y);
+        LV_LOG_INFO("Touch Poll - Event: %d; %d,%d", data->state, data->point.x, data->point.y);
 #endif
 
     return false;

lvgl_touch/stmpe610.c

@@ -7,7 +7,6 @@
  *********************/
 #include "stmpe610.h"
 #include "esp_system.h"
-#include "esp_log.h"
 #include "freertos/FreeRTOS.h"
 #include "freertos/task.h"
 #include "driver/gpio.h"
@@ -17,8 +16,6 @@
 /*********************
  *      DEFINES
  *********************/
-#define TAG        "STMPE610"
-
 
 /**********************
  *      TYPEDEFS
@@ -55,11 +52,11 @@ void stmpe610_init(void)
 	uint8_t u8;
 	uint16_t u16;
 	
-	ESP_LOGI(TAG, "Initialization.");
+	LV_LOG_INFO("Initialization.");
 
 	// Get the initial SPI configuration
 	//u8 = read_8bit_reg(STMPE_SPI_CFG);
-	//ESP_LOGI(TAG, "SPI_CFG = 0x%x", u8);
+	//LV_LOG_INFO("SPI_CFG = 0x%x", u8);
 	
     // Attempt a software reset
 	write_8bit_reg(STMPE_SYS_CTRL1, STMPE_SYS_CTRL1_RESET);
@@ -69,12 +66,12 @@ void stmpe610_init(void)
 	u8 = read_8bit_reg(STMPE_SPI_CFG);
 	write_8bit_reg(STMPE_SPI_CFG, u8 | STMPE_SPI_CFG_AA);
 	u8 = read_8bit_reg(STMPE_SPI_CFG);
-	ESP_LOGI(TAG, "SPI_CFG = 0x%x", u8);
+	LV_LOG_INFO("SPI_CFG = 0x%x", u8);
 	
 	// Verify SPI communication
 	u16 = read_16bit_reg(STMPE_CHIP_ID);
 	if (u16 != 0x811) {
-		ESP_LOGE(TAG, "Incorrect version: 0x%x", u16);
+		LV_LOG_ERROR("Incorrect version: 0x%x", u16);
 	}
 
 	write_8bit_reg(STMPE_SYS_CTRL2, 0x00); // Disable clocks
@@ -130,12 +127,12 @@ bool stmpe610_read(lv_indev_drv_t * drv, lv_indev_data_t * data)
 		}
 		
 		if (c > 0) {
-			//ESP_LOGI(TAG, "%d: %d %d %d", c, x, y, z);
+			//LV_LOG_INFO("%d: %d %d %d", c, x, y, z);
 		
 			adjust_data(&x, &y);
     		last_x = x;
     		last_y = y;
-    		//ESP_LOGI(TAG, "  ==> %d %d", x, y);
+    		//LV_LOG_INFO("  ==> %d %d", x, y);
     	}
     	
     	z = read_8bit_reg(STMPE_INT_STA);  // Clear interrupts
@@ -144,7 +141,7 @@ bool stmpe610_read(lv_indev_drv_t * drv, lv_indev_data_t * data)
     		// Clear the FIFO if we discover an overflow
     		write_8bit_reg(STMPE_FIFO_STA, STMPE_FIFO_STA_RESET);
 			write_8bit_reg(STMPE_FIFO_STA, 0); // unreset
-			ESP_LOGE(TAG, "Fifo overflow");
+			LV_LOG_ERROR("Fifo overflow");
 		}
     }
     

lvgl_touch/xpt2046.c

@@ -8,7 +8,6 @@
  *********************/
 #include "xpt2046.h"
 #include "esp_system.h"
-#include "esp_log.h"
 #include "driver/gpio.h"
 #include "tp_spi.h"
 #include <stddef.h>
@@ -16,8 +15,6 @@
 /*********************
  *      DEFINES
  *********************/
-#define TAG "XPT2046"
-
 #define CMD_X_READ  0b10010000  // NOTE: XPT2046 data sheet says this is actually Y
 #define CMD_Y_READ  0b11010000  // NOTE: XPT2046 data sheet says this is actually X
 #define CMD_Z1_READ 0b10110000
@@ -59,7 +56,7 @@ uint8_t avg_last;
  */
 void xpt2046_init(void)
 {
-    ESP_LOGI(TAG, "XPT2046 Initialization");
+    LV_LOG_INFO("Initialization");
 
 #if XPT2046_TOUCH_IRQ || XPT2046_TOUCH_IRQ_PRESS
     gpio_config_t irq_config = {
@@ -94,19 +91,19 @@ bool xpt2046_read(lv_indev_drv_t * drv, lv_indev_data_t * data)
 
         x = xpt2046_cmd(CMD_X_READ);
         y = xpt2046_cmd(CMD_Y_READ);
-        ESP_LOGI(TAG, "P(%d,%d)", x, y);
+        LV_LOG_INFO("P(%d,%d)", x, y);
 
         /*Normalize Data back to 12-bits*/
         x = x >> 4;
         y = y >> 4;
-        ESP_LOGI(TAG, "P_norm(%d,%d)", x, y);
+        LV_LOG_INFO("P_norm(%d,%d)", x, y);
         
         xpt2046_corr(&x, &y);
         xpt2046_avg(&x, &y);
         last_x = x;
         last_y = y;
 
-        ESP_LOGI(TAG, "x = %d, y = %d", x, y);
+        LV_LOG_INFO("x = %d, y = %d", x, y);
     }
     else
     {