fix(lcd-backlight): Update to ESP IDF v5

with ESP32-C3 specific auto-dma proper selection

.gitignore

@@ -56,3 +56,7 @@ dkms.conf
 
 # ESP-IDF build dir
 build
+
+# Kconfig files
+sdkconfig
+sdkconfig.old

CMakeLists.txt

@@ -42,6 +42,10 @@ 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()
@@ -84,7 +88,7 @@ endif()
 
 idf_component_register(SRCS ${SOURCES}
                        INCLUDE_DIRS ${LVGL_INCLUDE_DIRS}
-                       REQUIRES lvgl)
+                       REQUIRES lvgl driver esp_common log freertos esp_rom soc)
 
 target_compile_definitions(${COMPONENT_LIB} PUBLIC "-DLV_LVGL_H_INCLUDE_SIMPLE")
 

README.md

@@ -30,6 +30,7 @@ swap of RGB565 color on the LVGL configuration menuconfig (it's not handled auto
 | RA8875                                      | TFT        | SPI                    | 16: RGB565                   | Yes                                    |
 | SH1107                                      | Monochrome | SPI                    | 1: 1byte per pixel           | No                                     |
 | SSD1306                                     | Monochrome | I2C                    | 1: 1byte per pixel           | No                                     |
+| PCD8544                                     | Monochrome | SPI                    | 1: 1byte per pixel           | No                                     |
 | IL3820                                      | e-Paper    | SPI                    | 1: 1byte per pixel           | No                                     |
 | UC8151D/ GoodDisplay GDEW0154M10 DES        | e-Paper    | SPI                    | 1: 1byte per pixel           | No                                     |
 | FitiPower JD79653A/ GoodDisplay GDEW0154M09 | e-Paper    | SPI                    | 1: 1byte per pixel           | No                                     |

lvgl_helpers.c

@@ -154,34 +154,12 @@ bool lvgl_spi_driver_init(int host,
     int dma_channel,
     int quadwp_pin, int quadhd_pin)
 {
-    int dma_chan = 0 /* SPI_DMA_DISABLED */;
-
-#if defined (CONFIG_IDF_TARGET_ESP32)
-    assert((SPI_HOST <= host) && (VSPI_HOST >= host));
-    const char *spi_names[] = {
-        "SPI_HOST", "HSPI_HOST", "VSPI_HOST"
-    };
-
-    dma_chan = dma_channel;
-#elif defined (CONFIG_IDF_TARGET_ESP32S2)
-    assert((SPI_HOST <= host) && (HSPI_HOST >= host));
-    const char *spi_names[] = {
-        "SPI_HOST", "", ""
-    };
-
-    dma_chan = dma_channel;
-#elif defined (CONFIG_IDF_TARGET_ESP32C3)
-    assert((SPI1_HOST <= host) && (SPI3_HOST >= host));
+    assert((0 <= host) && (3 > host));
     const char *spi_names[] = {
         "SPI1_HOST", "SPI2_HOST", "SPI3_HOST"
     };
 
-    dma_chan = 3 /* SPI_DMA_CH_AUTO */;
-#else
-#error "Target chip not selected"
-#endif
-
-    ESP_LOGI(TAG, "Configuring SPI host %s (%d)", spi_names[host], host);
+    ESP_LOGI(TAG, "Configuring SPI host %s", spi_names[host]);
     ESP_LOGI(TAG, "MISO pin: %d, MOSI pin: %d, SCLK pin: %d, IO2/WP pin: %d, IO3/HD pin: %d",
         miso_pin, mosi_pin, sclk_pin, quadwp_pin, quadhd_pin);
 
@@ -189,17 +167,19 @@ bool lvgl_spi_driver_init(int host,
 
     spi_bus_config_t buscfg = {
         .miso_io_num = miso_pin,
-	.mosi_io_num = mosi_pin,
-	.sclk_io_num = sclk_pin,
-	.quadwp_io_num = quadwp_pin,
-	.quadhd_io_num = quadhd_pin,
+        .mosi_io_num = mosi_pin,
+        .sclk_io_num = sclk_pin,
+        .quadwp_io_num = quadwp_pin,
+        .quadhd_io_num = quadhd_pin,
         .max_transfer_sz = max_transfer_sz
     };
 
     ESP_LOGI(TAG, "Initializing SPI bus...");
-    esp_err_t ret = spi_bus_initialize(host, &buscfg, dma_chan);
+    #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);
     assert(ret == ESP_OK);
 
     return ESP_OK != ret;
 }
-

lvgl_helpers.h

@@ -76,6 +76,10 @@ extern "C" {
 #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

lvgl_i2c/Kconfig

@@ -6,8 +6,10 @@ menu "I2C Port 0"
 	if I2C_MANAGER_0_ENABLED
 		config I2C_MANAGER_0_SDA
 			int "SDA (GPIO pin)"
+			default 0
 		config I2C_MANAGER_0_SCL
 			int "SCL (GPIO pin)"
+			default 0
 		config I2C_MANAGER_0_FREQ_HZ
 			int "Frequency (Hz)"
 			default 400000

lvgl_i2c/README.md

@@ -8,9 +8,11 @@
 
 ### I2C Manager support
 
-`lvgl_esp32_drivers` integrates [I2C Manager](https://github.com/ropg/i2c_manager), which is used in case you select a touch sensor or screen that uses the I2C bus. If you're just using LVGL you don't need to do anything special.
+`lvgl_esp32_drivers` integrates [I2C Manager](https://github.com/ropg/i2c_manager), which is used in case you select a touch sensor or screen that uses the I2C bus.
 
-I2C Manager can help if you are in a situation where you want to avoid "bus conflicts" on the I2C bus. Suppose you use LVGL with a touch sensor that uses I2C, and your device also has another I2C device that needs to be read frequently, such as a 3D-accelerometer. ESP-IDF is not inherently "thread-safe". So if you read that from another task than the one LVGL uses to read the touch data, you need some kind of mechanism to keep these communications from interfering. 
+I2C Manager is also available as a separate ESP-IDF component and can help if you are in a situation where you want to avoid "bus conflicts" on the I2C bus. **If in your application nothing outside of LVGL needs to talk to the I2C bus, you can stop reading here.**
+
+Suppose you use LVGL with a touch sensor that uses I2C, and your device also has another I2C device that needs to be read frequently, such as a 3D-accelerometer. ESP-IDF is not inherently "thread-safe". So if you read that from another task than the one LVGL uses to read the touch data, you need some kind of mechanism to keep these communications from interfering. 
 
 If you have (or write) a driver for that 3D-accelerometer that can use I2C Manager (or the I2C HAL and i2cdev abstraction layers that I2C Manager is compatible with) then put I2C Manager in your components directory by cloning the repository from below and in your main program do:
 

lvgl_spi_conf.h

@@ -64,16 +64,10 @@ extern "C" {
 
 #define ENABLE_TOUCH_INPUT  CONFIG_LV_ENABLE_TOUCH
 
-#if defined (CONFIG_LV_TFT_DISPLAY_SPI_HSPI)
-#if defined (CONFIG_IDF_TARGET_ESP32C3)
-#define TFT_SPI_HOST    SPI2_HOST
-#else
-#define TFT_SPI_HOST    HSPI_HOST
-#endif
-#elif defined (CONFIG_LV_TFT_DISPLAY_SPI_VSPI)
-#define TFT_SPI_HOST    VSPI_HOST
-#elif defined (CONFIG_LV_TFT_DISPLAY_SPI_FSPI)
-#define TFT_SPI_HOST    FSPI_HOST
+#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
 #endif
 
 #if defined (CONFIG_LV_TFT_DISPLAY_SPI_HALF_DUPLEX)
@@ -90,12 +84,10 @@ extern "C" {
 #define DISP_SPI_TRANS_MODE_SIO
 #endif
 
-#if defined (CONFIG_LV_TOUCH_CONTROLLER_SPI_HSPI)
-#define TOUCH_SPI_HOST HSPI_HOST
-#elif defined (CONFIG_LV_TOUCH_CONTROLLER_SPI_VSPI)
-#define TOUCH_SPI_HOST VSPI_HOST
-#elif defined (CONFIG_LV_TOUCH_CONTROLLER_SPI_FSPI)
-#define TOUCH_SPI_HOST FSPI_HOST
+#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
 
 /* Handle the FT81X Special case */
@@ -111,7 +103,7 @@ extern "C" {
 // 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 (HSPI, VSPI or FSPI) for both display and touch driver
+#error You must specify the same SPI host (SPIx_HOST) for both display and touch driver
 #endif
 
 #define SHARED_SPI_BUS
@@ -122,7 +114,11 @@ extern "C" {
 /**********************
  *      TYPEDEFS
  **********************/
-#if defined (CONFIG_LV_TFT_DISPLAY_CONTROLLER_ILI9481) || \
+#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)
@@ -166,8 +162,10 @@ extern "C" {
 #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  (40*1000*1000)
+#define SPI_TFT_CLOCK_SPEED_HZ  (5*1000*1000) // Set to 40 later
 #endif
 
 #endif

lvgl_tft/Kconfig

@@ -22,7 +22,7 @@ menu "LVGL TFT Display controller"
             select LV_TFT_DISPLAY_CONTROLLER_ILI9341
             select LV_TFT_DISPLAY_PROTOCOL_SPI
         config LV_PREDEFINED_DISPLAY_M5CORE2
-        	bool "M5Core2"
+            bool "M5Core2"
             select LV_TFT_DISPLAY_CONTROLLER_ILI9341
             select LV_TFT_DISPLAY_PROTOCOL_SPI
         config LV_PREDEFINED_DISPLAY_M5STICK
@@ -174,6 +174,14 @@ menu "LVGL TFT Display controller"
         help
             ILI9163C display controller.
 
+    config LV_TFT_DISPLAY_CONTROLLER_PCD8544
+        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
@@ -195,24 +203,24 @@ menu "LVGL TFT Display controller"
     # Used in display init function to send display orientation commands
     choice DISPLAY_ORIENTATION
         prompt "Display orientation"
-        default DISPLAY_ORIENTATION_PORTRAIT if !LV_TFT_DISPLAY_CONTROLLER_SSD1306
-        default DISPLAY_ORIENTATION_LANDSCAPE if LV_TFT_DISPLAY_CONTROLLER_SSD1306
-        config DISPLAY_ORIENTATION_PORTRAIT
+        default LV_DISPLAY_ORIENTATION_PORTRAIT if !LV_TFT_DISPLAY_CONTROLLER_SSD1306
+        default LV_DISPLAY_ORIENTATION_LANDSCAPE if LV_TFT_DISPLAY_CONTROLLER_SSD1306
+        config LV_DISPLAY_ORIENTATION_PORTRAIT
             bool "Portrait" if !LV_TFT_DISPLAY_CONTROLLER_SSD1306
-        config DISPLAY_ORIENTATION_PORTRAIT_INVERTED
+        config LV_DISPLAY_ORIENTATION_PORTRAIT_INVERTED
             bool "Portrait inverted" if !LV_TFT_DISPLAY_CONTROLLER_SSD1306
-        config DISPLAY_ORIENTATION_LANDSCAPE
+        config LV_DISPLAY_ORIENTATION_LANDSCAPE
             bool "Landscape"
-        config DISPLAY_ORIENTATION_LANDSCAPE_INVERTED
+        config LV_DISPLAY_ORIENTATION_LANDSCAPE_INVERTED
             bool "Landscape inverted"
     endchoice
 
     config LV_DISPLAY_ORIENTATION
         int
-        default 0 if DISPLAY_ORIENTATION_PORTRAIT
-        default 1 if DISPLAY_ORIENTATION_PORTRAIT_INVERTED
-        default 2 if DISPLAY_ORIENTATION_LANDSCAPE
-        default 3 if DISPLAY_ORIENTATION_LANDSCAPE_INVERTED
+        default 0 if LV_DISPLAY_ORIENTATION_PORTRAIT
+        default 1 if LV_DISPLAY_ORIENTATION_PORTRAIT_INVERTED
+        default 2 if LV_DISPLAY_ORIENTATION_LANDSCAPE
+        default 3 if LV_DISPLAY_ORIENTATION_LANDSCAPE_INVERTED
 
     config LV_TFT_DISPLAY_OFFSETS
         bool
@@ -222,15 +230,15 @@ 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 && (DISPLAY_ORIENTATION_LANDSCAPE || DISPLAY_ORIENTATION_LANDSCAPE_INVERTED)
-        default 53 if LV_PREDEFINED_DISPLAY_TTGO && (DISPLAY_ORIENTATION_PORTRAIT  || DISPLAY_ORIENTATION_PORTRAIT_INVERTED)
+        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 0
 
     config LV_TFT_DISPLAY_Y_OFFSET
         depends on LV_TFT_DISPLAY_OFFSETS
         int "Y offset"
-        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 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 0
 
 
@@ -340,6 +348,15 @@ menu "LVGL TFT Display controller"
             bool "ILI9163C"
             select LV_TFT_DISPLAY_CONTROLLER_ILI9163C
             select LV_TFT_DISPLAY_PROTOCOL_SPI
+        config LV_TFT_DISPLAY_USER_CONTROLLER_PCD8544
+            bool "PCD8544"
+            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
@@ -460,18 +477,14 @@ menu "LVGL TFT Display controller"
 
     choice
         prompt "TFT SPI Bus." if LV_TFT_DISPLAY_PROTOCOL_SPI
-        default LV_TFT_DISPLAY_SPI_VSPI if LV_PREDEFINED_DISPLAY_TTGO && \
-            !IDF_TARGET_ESP32S2
-        default LV_TFT_DISPLAY_SPI_FSPI if IDF_TARGET_ESP32S2
+        default LV_TFT_DISPLAY_SPI2_HOST
         help
               Select the SPI Bus the TFT Display is attached to.
 
-        config LV_TFT_DISPLAY_SPI_HSPI
-            bool "HSPI"
-        config LV_TFT_DISPLAY_SPI_VSPI
-            bool "VSPI" if !IDF_TARGET_ESP32S2
-        config LV_TFT_DISPLAY_SPI_FSPI
-            bool "FSPI" if IDF_TARGET_ESP32S2
+        config LV_TFT_DISPLAY_SPI2_HOST
+            bool "SPI2_HOST"
+        config LV_TFT_DISPLAY_SPI3_HOST
+            bool "SPI3_HOST"
     endchoice
 
     choice
@@ -1003,6 +1016,3 @@ menu "LVGL TFT Display controller"
         default 0
 
 endmenu
-
-
-

lvgl_tft/disp_driver.c

@@ -43,6 +43,10 @@ void *disp_driver_init(void)
    uc8151d_init();
 #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();
 #endif
 
     // We still use menuconfig for these settings
@@ -107,6 +111,10 @@ void disp_driver_flush(lv_disp_drv_t * drv, const lv_area_t * area, lv_color_t *
     uc8151d_lv_fb_flush(drv, area, color_map);
 #elif defined CONFIG_LV_TFT_DISPLAY_CONTROLLER_ILI9163C
     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
 }
 
@@ -122,6 +130,8 @@ void disp_driver_rounder(lv_disp_drv_t * disp_drv, lv_area_t * area)
     jd79653a_lv_rounder_cb(disp_drv, area);
 #elif defined CONFIG_LV_TFT_DISPLAY_CONTROLLER_UC8151D
     uc8151d_lv_rounder_cb(disp_drv, area);
+#elif defined CONFIG_LV_TFT_DISPLAY_CONTROLLER_PCD8544
+    pcd8544_rounder(disp_drv, area);
 #endif
 }
 
@@ -138,5 +148,7 @@ void disp_driver_set_px(lv_disp_drv_t * disp_drv, uint8_t * buf, lv_coord_t buf_
     jd79653a_lv_set_fb_cb(disp_drv, buf, buf_w, x, y, color, opa);
 #elif defined CONFIG_LV_TFT_DISPLAY_CONTROLLER_UC8151D
     uc8151d_lv_set_fb_cb(disp_drv, buf, buf_w, x, y, color, opa);
+#elif defined CONFIG_LV_TFT_DISPLAY_CONTROLLER_PCD8544
+   pcd8544_set_px_cb(disp_drv, buf, buf_w, x, y, color, opa);
 #endif
 }

lvgl_tft/disp_driver.h

@@ -52,6 +52,10 @@ extern "C" {
 #include "uc8151d.h"
 #elif defined CONFIG_LV_TFT_DISPLAY_CONTROLLER_ILI9163C
 #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
 
 /*********************

lvgl_tft/esp_lcd_backlight.c

@@ -8,10 +8,12 @@
  *********************/
 #include "esp_lcd_backlight.h"
 #include "driver/ledc.h"
-#include "driver/gpio.h"
+#include "rom/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
@@ -49,7 +51,7 @@ 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,
-            .bit_num = LEDC_TIMER_10_BIT,
+            .duty_resolution = LEDC_TIMER_10_BIT,
             .timer_num = config->timer_idx,
             .freq_hz = 5000,
             .clk_cfg = LEDC_AUTO_CLK};

lvgl_tft/pcd8544.c

@@ -0,0 +1,148 @@
+/**
+ * @file pcd8544.c
+ *
+ * Roughly based on:
+ *    https://github.com/adafruit/Adafruit-PCD8544-Nokia-5110-LCD-library
+ *    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"
+
+#define TAG "lv_pcd8544"
+
+/**********************
+ *      MACROS
+ **********************/
+
+#define BIT_SET(a,b) ((a) |= (1U<<(b)))
+#define BIT_CLEAR(a,b) ((a) &= ~(1U<<(b)))
+
+/**********************
+ *   STATIC FUNCTIONS
+ **********************/
+
+static void pcd8544_send_cmd(uint8_t cmd)
+{
+    disp_wait_for_pending_transactions();
+    gpio_set_level(PCD8544_DC, 0);	 /*Command mode*/
+    disp_spi_send_data(&cmd, 1);
+}
+
+static void pcd8544_send_data(void * data, uint16_t length)
+{
+    disp_wait_for_pending_transactions();
+    gpio_set_level(PCD8544_DC, 1);	 /*Data mode*/
+    disp_spi_send_data(data, length);
+}
+
+static void pcd8544_send_colors(void * data, uint16_t length)
+{
+    gpio_set_level(PCD8544_DC, 1);	 /*Data mode*/
+    disp_spi_send_colors(data, 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_set_contrast (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 */
+}
+
+void pcd8544_rounder(lv_disp_drv_t * disp_drv, lv_area_t *area){
+    uint8_t hor_max = disp_drv->hor_res;
+    uint8_t ver_max = disp_drv->ver_res;
+
+    area->x1 = 0;
+    area->y1 = 0;
+    area->x2 = hor_max - 1;
+    area->y2 = ver_max - 1;
+}
+
+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){
+
+    uint8_t set = (color.full == 0) && (LV_OPA_TRANSP != opa);
+
+    uint16_t byte_index = x + (( y>>3 ) * buf_w);
+    uint8_t  bit_index  = y & 0x7;
+
+    if (set) {
+        BIT_SET(buf[byte_index], bit_index);
+    } else {
+        BIT_CLEAR(buf[byte_index], bit_index);
+    }
+}
+
+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) */
+
+    uint8_t * buf = (uint8_t *) color_map;
+
+    // Check if the whole frame buffer can be sent in a single SPI transaction
+
+    if ((area->x1 == 0) && (area->y1 == 0) && (area->x2 == (disp_drv->hor_res - 1)) && (area->y2 == (disp_drv->ver_res - 1))){
+
+        // 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);
+
+    } else {
+
+        // send horizontal tiles
+
+        uint16_t bank_start =  area->y1 / 8;
+        uint16_t bank_end   =  area->y2 / 8;
+
+        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 */
+            uint16_t offset = bank * disp_drv->hor_res + area->x1;
+            pcd8544_send_data(&buf[offset], cols_to_update);
+        }
+
+        lv_disp_flush_ready(disp_drv);
+    }
+}

lvgl_tft/pcd8544.h

@@ -0,0 +1,57 @@
+
+/**
+ * @file pcd8544.h
+ *
+ */
+
+#ifndef PCD8544_H
+#define PCD8544_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/*********************
+ *      INCLUDES
+ *********************/
+#include <stdbool.h>
+
+#ifdef LV_LVGL_H_INCLUDE_SIMPLE
+#include "lvgl.h"
+#else
+#include "lvgl/lvgl.h"
+#endif
+
+/*********************
+ *      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
+ **********************/
+
+/**********************
+ * GLOBAL PROTOTYPES
+ **********************/
+
+void pcd8544_init(void);
+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);
+
+/**********************
+ *      MACROS
+ **********************/
+
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#endif /*PCD8544_H*/

lvgl_tft/schmitt.c

@@ -0,0 +1,27 @@
+#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

@@ -0,0 +1,20 @@
+#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/ssd1306.c

@@ -99,10 +99,10 @@ void ssd1306_init(void)
     uint8_t orientation_1 = 0;
     uint8_t orientation_2 = 0;
 
-#if defined (CONFIG_DISPLAY_ORIENTATION_LANDSCAPE)
+#if defined (CONFIG_LV_DISPLAY_ORIENTATION_LANDSCAPE)
     orientation_1 = OLED_CMD_SET_SEGMENT_REMAP;
     orientation_2 = OLED_CMD_SET_COM_SCAN_MODE_REMAP;
-#elif defined (CONFIG_DISPLAY_ORIENTATION_LANDSCAPE_INVERTED)
+#elif defined (CONFIG_LV_DISPLAY_ORIENTATION_LANDSCAPE_INVERTED)
     orientation_1 = 0xA0;
     orientation_2 = OLED_CMD_SET_COM_SCAN_MODE_NORMAL;
 #else

lvgl_tft/st7789.c

@@ -35,7 +35,7 @@ typedef struct {
  **********************/
 static void st7789_set_orientation(uint8_t orientation);
 
-static void st7789_send_color(void *data, uint16_t length);
+static void st7789_send_color(void *data, size_t length);
 
 /**********************
  *  STATIC VARIABLES
@@ -120,9 +120,9 @@ void st7789_init(void)
     st7789_set_orientation(CONFIG_LV_DISPLAY_ORIENTATION);
 }
 
-/* The ST7789 display controller can drive 320*240 displays, when using a 240*240
- * display there's a gap of 80px, we need to edit the coordinates to take into
- * account that gap, this is not necessary in all orientations. */
+/* The ST7789 display controller can drive up to 320*240 displays, when using a 240*240 or 240*135
+ * displays there's a gap of 80px or 40/52/53px respectively. 52px or 53x offset depends on display orientation.
+ * We need to edit the coordinates to take into account those gaps, this is not necessary in all orientations. */
 void st7789_flush(lv_disp_drv_t * drv, const lv_area_t * area, lv_color_t * color_map)
 {
     uint8_t data[4] = {0};
@@ -139,13 +139,29 @@ void st7789_flush(lv_disp_drv_t * drv, const lv_area_t * area, lv_color_t * colo
     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
+    #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
 
     /*Column addresses*/
@@ -167,7 +183,7 @@ void st7789_flush(lv_disp_drv_t * drv, const lv_area_t * area, lv_color_t * colo
     /*Memory write*/
     st7789_send_cmd(ST7789_RAMWR);
 
-    uint32_t size = lv_area_get_width(area) * lv_area_get_height(area);
+    size_t size = (size_t)lv_area_get_width(area) * (size_t)lv_area_get_height(area);
 
     st7789_send_color((void*)color_map, size * 2);
 
@@ -190,7 +206,7 @@ void st7789_send_data(void * data, uint16_t length)
     disp_spi_send_data(data, length);
 }
 
-static void st7789_send_color(void * data, uint16_t length)
+static void st7789_send_color(void * data, size_t length)
 {
     disp_wait_for_pending_transactions();
     gpio_set_level(ST7789_DC, 1);

lvgl_touch/Kconfig

@@ -1,28 +1,28 @@
 menu "LVGL Touch controller"
 
     config LV_TOUCH_CONTROLLER
-	int
-	default 0 if LV_TOUCH_CONTROLLER_NONE
-	default 1 if LV_TOUCH_CONTROLLER_XPT2046
-	default 2 if LV_TOUCH_CONTROLLER_FT6X06
-	default 3 if LV_TOUCH_CONTROLLER_STMPE610
+        int
+        default 0 if LV_TOUCH_CONTROLLER_NONE
+        default 1 if LV_TOUCH_CONTROLLER_XPT2046
+        default 2 if LV_TOUCH_CONTROLLER_FT6X06
+        default 3 if LV_TOUCH_CONTROLLER_STMPE610
         default 4 if LV_TOUCH_CONTROLLER_ADCRAW
         default 5 if LV_TOUCH_CONTROLLER_FT81X
         default 6 if LV_TOUCH_CONTROLLER_RA8875
         default 7 if LV_TOUCH_CONTROLLER_GT911
 
     choice
-	prompt "Select a touch panel controller model."
-	default LV_TOUCH_CONTROLLER_NONE
-	help
-	    Select the controller for your touch panel.
+        prompt "Select a touch panel controller model."
+        default LV_TOUCH_CONTROLLER_NONE
+        help
+            Select the controller for your touch panel.
 
-	config LV_TOUCH_CONTROLLER_NONE
-	    bool "None"
-	config LV_TOUCH_CONTROLLER_XPT2046
+        config LV_TOUCH_CONTROLLER_NONE
+            bool "None"
+        config LV_TOUCH_CONTROLLER_XPT2046
             select LV_TOUCH_DRIVER_PROTOCOL_SPI
             bool "XPT2046"
-	config LV_TOUCH_CONTROLLER_FT6X06
+        config LV_TOUCH_CONTROLLER_FT6X06
             select LV_I2C_TOUCH
             bool "FT6X06"
         config LV_TOUCH_CONTROLLER_STMPE610
@@ -61,23 +61,20 @@ menu "LVGL Touch controller"
         bool
         help
             Touch controller uses same interface/device as display
-	    (Note: Display must be initialized before touch)
+            (Note: Display must be initialized before touch)
 
     choice
         prompt "Touch Controller SPI Bus."
         depends on LV_TOUCH_DRIVER_PROTOCOL_SPI
 
-        default LV_TOUCH_CONTROLLER_SPI_VSPI if !IDF_TARGET_ESP32S2
-        default LV_TOUCH_CONTROLLER_SPI_FSPI if IDF_TARGET_ESP32S2
+        default LV_TOUCH_CONTROLLER_SPI2_HOST
         help
-            Select the SPI Bus the TFT Display is attached to.
+            Select the SPI Bus the touch controller is attached to.
 
-        config LV_TOUCH_CONTROLLER_SPI_HSPI
-            bool "HSPI"
-        config LV_TOUCH_CONTROLLER_SPI_VSPI
-            bool "VSPI" if !IDF_TARGET_ESP32S2
-        config LV_TOUCH_CONTROLLER_SPI_FSPI
-            bool "FSPI" if IDF_TARGET_ESP32S2
+        config LV_TOUCH_CONTROLLER_SPI2_HOST
+            bool "SPI2_HOST"
+        config LV_TOUCH_CONTROLLER_SPI3_HOST
+            bool "SPI3_HOST"
         endchoice
 
     menu "Touchpanel (XPT2046) Pin Assignments"
@@ -86,7 +83,7 @@ menu "LVGL Touch controller"
         config LV_TOUCH_SPI_MISO
             int
             prompt "GPIO for MISO (Master In Slave Out)"
-            
+
             default 35 if LV_PREDEFINED_PINS_38V1
             default 19
             help
@@ -103,7 +100,7 @@ menu "LVGL Touch controller"
 
         config LV_TOUCH_SPI_CLK
             int "GPIO for CLK (SCK / Serial Clock)"
-            
+
             default 26 if LV_PREDEFINED_PINS_38V1
             default 18
             help
@@ -119,7 +116,7 @@ menu "LVGL Touch controller"
 
         config LV_TOUCH_PIN_IRQ
             int "GPIO for IRQ (Interrupt Request)"
-	    
+
             default 27 if LV_PREDEFINED_PINS_38V4
             default 25
             help
@@ -153,10 +150,10 @@ menu "LVGL Touch controller"
             default 4095 if LV_PREDEFINED_PINS_38V4
             default 1900
 
-		config LV_TOUCH_XY_SWAP
-        	bool
-        	prompt "Swap XY."
-        	default y
+        config LV_TOUCH_XY_SWAP
+            bool
+            prompt "Swap XY."
+            default y
 
         config LV_TOUCH_INVERT_X
             bool
@@ -201,6 +198,13 @@ menu "LVGL Touch controller"
             prompt "Invert Y coordinate value."
             default n
 
+        config LV_FT6X36_COORDINATES_QUEUE
+            bool
+            prompt "Send coordinates to FreeRTOS queue."
+            default n
+            help
+            Receive from the FreeRTOS queue using the handle 'ft6x36_touch_queue_handle'.
+
     endmenu
 
     menu "Touchpanel (STMPE610) Pin Assignments"
@@ -209,7 +213,7 @@ menu "LVGL Touch controller"
         config LV_TOUCH_SPI_MISO
             int
             prompt "GPIO for MISO (Master In Slave Out)"
-            
+
             default 35 if LV_PREDEFINED_PINS_38V1
             default 19 if LV_PREDEFINED_DISPLAY_ADA_FEATHERWING
             default 19
@@ -271,9 +275,9 @@ menu "LVGL Touch controller"
             default 3800
 
         config LV_TOUCH_XY_SWAP
-        	bool
-        	prompt "Swap XY."
-        	default n
+            bool
+            prompt "Swap XY."
+            default n
 
         config LV_TOUCH_INVERT_X
             bool
@@ -372,25 +376,25 @@ menu "LVGL Touch controller"
         config LV_TOUCH_X_MIN
             int
             prompt "Minimum X coordinate ADC value"
-	    range 0 1023
+            range 0 1023
             default 0
 
         config LV_TOUCH_Y_MIN
             int
             prompt "Minimum Y coordinate ADC value"
-	    range 0 1023
+            range 0 1023
             default 0
 
         config LV_TOUCH_X_MAX
             int
             prompt "Maximum X coordinate ADC value"
-	    range 0 1023
+            range 0 1023
             default 1023
 
         config LV_TOUCH_Y_MAX
             int
             prompt "Maximum Y coordinate ADC value"
-	    range 0 1023
+            range 0 1023
             default 1023
 
         config LV_TOUCH_XY_SWAP
@@ -411,13 +415,13 @@ menu "LVGL Touch controller"
         config LV_TOUCH_RA8875_SAMPLE_TIME
             int
             prompt "TP Sample Time Adjusting"
-	    range 0 7
+            range 0 7
             default 0
 
         config LV_TOUCH_RA8875_ADC_CLOCK
             int
             prompt "ADC Clock Setting"
-	    range 0 7
+            range 0 7
             default 0
 
         config LV_TOUCH_RA8875_WAKEUP_ENABLE
@@ -440,10 +444,10 @@ menu "LVGL Touch controller"
     menu "Touchpanel Configuration (GT911)"
         depends on LV_TOUCH_CONTROLLER_GT911
 
-	config LV_GT911_SWAPXY
-	    bool
-	    prompt "Swap X with Y coordinate."
-	    default y
+    config LV_GT911_SWAPXY
+        bool
+        prompt "Swap X with Y coordinate."
+        default y
 
         config LV_GT911_INVERT_X
             bool
@@ -465,14 +469,14 @@ menu "LVGL Touch controller"
         config LV_I2C_TOUCH_PORT_0
             bool
             prompt "I2C port 0"
-            help 
+            help
                 I2C is shared peripheral managed by I2C Manager. In order to configure I2C Manager (pinout, etc.) see menu
                 Component config->I2C Port Settings.
 
         config LV_I2C_TOUCH_PORT_1
             bool
             prompt "I2C port 1"
-            help 
+            help
                 I2C is shared peripheral managed by I2C Manager. In order to configure I2C Manager (pinout, etc.) see menu
                 Component config->I2C Port Settings.
 

lvgl_touch/ft6x36.c

@@ -25,20 +25,23 @@
 #include <lvgl/lvgl.h>
 #endif
 #include "ft6x36.h"
-
 #include "lvgl_i2c/i2c_manager.h"
 
 #define TAG "FT6X36"
+#define FT6X36_TOUCH_QUEUE_ELEMENTS 1
 
 
-ft6x36_status_t ft6x36_status;
-uint8_t current_dev_addr;       // set during init
+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
+#if CONFIG_LV_FT6X36_COORDINATES_QUEUE
+QueueHandle_t ft6x36_touch_queue_handle;
+#endif
 
-esp_err_t ft6x06_i2c_read8(uint8_t slave_addr, uint8_t register_addr, uint8_t *data_buf) {
+static esp_err_t ft6x06_i2c_read8(uint8_t slave_addr, uint8_t register_addr, uint8_t *data_buf) {
     return lvgl_i2c_read(CONFIG_LV_I2C_TOUCH_PORT, slave_addr, register_addr, data_buf, 1);
 }
 
-
 /**
   * @brief  Read the FT6x36 gesture ID. Initialize first!
   * @param  dev_addr: I2C FT6x36 Slave address.
@@ -84,7 +87,16 @@ void ft6x06_init(uint16_t dev_addr) {
 
     ft6x06_i2c_read8(dev_addr, FT6X36_RELEASECODE_REG, &data_buf);
     ESP_LOGI(TAG, "\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" );
+        return;
+    }
+    xQueueSend( ft6x36_touch_queue_handle, &touch_inputs, 0 );
+#endif
 }
 
 /**
@@ -99,8 +111,6 @@ bool ft6x36_read(lv_indev_drv_t *drv, lv_indev_data_t *data) {
         return 0x00;
     }
     uint8_t data_buf[5];        // 1 byte status, 2 bytes X, 2 bytes Y
-    static int16_t last_x = 0;  // 12bit pixel value
-    static int16_t last_y = 0;  // 12bit pixel value
 
     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) {
@@ -109,29 +119,42 @@ bool ft6x36_read(lv_indev_drv_t *drv, lv_indev_data_t *data) {
     uint8_t touch_pnt_cnt = data_buf[0];  // Number of detected touch points
 
     if (ret != ESP_OK || touch_pnt_cnt != 1) {    // ignore no touch & multi touch
-        data->point.x = last_x;
-        data->point.y = last_y;
-        data->state = LV_INDEV_STATE_REL;
+        if ( touch_inputs.current_state != LV_INDEV_STATE_REL)
+        {
+            touch_inputs.current_state = LV_INDEV_STATE_REL;
+#if CONFIG_LV_FT6X36_COORDINATES_QUEUE
+            xQueueOverwrite( ft6x36_touch_queue_handle, &touch_inputs );
+#endif
+        } 
+        data->point.x = touch_inputs.last_x;
+        data->point.y = touch_inputs.last_y;
+        data->state = touch_inputs.current_state;
         return false;
     }
 
-    last_x = ((data_buf[1] & FT6X36_MSB_MASK) << 8) | (data_buf[2] & FT6X36_LSB_MASK);
-    last_y = ((data_buf[3] & FT6X36_MSB_MASK) << 8) | (data_buf[4] & FT6X36_LSB_MASK);
+    touch_inputs.current_state = LV_INDEV_STATE_PR;
+    touch_inputs.last_x = ((data_buf[1] & FT6X36_MSB_MASK) << 8) | (data_buf[2] & FT6X36_LSB_MASK);
+    touch_inputs.last_y = ((data_buf[3] & FT6X36_MSB_MASK) << 8) | (data_buf[4] & FT6X36_LSB_MASK);
 
+#if CONFIG_LV_FT6X36_SWAPXY
+    int16_t swap_buf = touch_inputs.last_x;
+    touch_inputs.last_x = touch_inputs.last_y;
+    touch_inputs.last_y = swap_buf;
+#endif
 #if CONFIG_LV_FT6X36_INVERT_X
-    last_x =  LV_HOR_RES - last_x;
+    touch_inputs.last_x =  LV_HOR_RES - touch_inputs.last_x;
 #endif
 #if CONFIG_LV_FT6X36_INVERT_Y
-    last_y = LV_VER_RES - last_y;
+    touch_inputs.last_y = LV_VER_RES - touch_inputs.last_y;
 #endif
-#if CONFIG_LV_FT6X36_SWAPXY
-    int16_t swap_buf = last_x;
-    last_x = last_y;
-    last_y = swap_buf;
-#endif
-    data->point.x = last_x;
-    data->point.y = last_y;
-    data->state = LV_INDEV_STATE_PR;
+    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);
+
+#if CONFIG_LV_FT6X36_COORDINATES_QUEUE
+    xQueueOverwrite( ft6x36_touch_queue_handle, &touch_inputs );
+#endif
+
     return false;
 }

lvgl_touch/ft6x36.h

@@ -23,6 +23,10 @@
 
 #include <stdint.h>
 #include <stdbool.h>
+#if CONFIG_LV_FT6X36_COORDINATES_QUEUE
+#include "freertos/FreeRTOS.h"
+#include "freertos/queue.h"
+#endif
 #ifdef LV_LVGL_H_INCLUDE_SIMPLE
 #include "lvgl.h"
 #else
@@ -145,6 +149,16 @@ typedef struct {
     bool inited;
 } ft6x36_status_t;
 
+typedef struct
+{
+  int16_t last_x;
+  int16_t last_y;
+  lv_indev_state_t current_state;
+} ft6x36_touch_t;
+
+#if CONFIG_LV_FT6X36_COORDINATES_QUEUE
+extern QueueHandle_t ft6x36_touch_queue_handle;
+#endif
 /**
   * @brief  Initialize for FT6x36 communication via I2C
   * @param  dev_addr: Device address on communication Bus (I2C slave address of FT6X36).