lvgl_esp32_drivers/lvgl_tft/ili9488.c

211 lines
5.9 KiB
C

/**
* @file ili9488.c
*/
/*********************
* INCLUDES
*********************/
#include "ili9488.h"
#include "disp_spi.h"
#include "driver/gpio.h"
#include "esp_heap_caps.h"
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
/*********************
* DEFINES
*********************/
#define TAG "ILI9488: "
/**********************
* 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];
uint8_t databytes; //No of data in data; bit 7 = delay after set; 0xFF = end of cmds.
} lcd_init_cmd_t;
/**********************
* STATIC PROTOTYPES
**********************/
static void ili9488_set_orientation(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 VARIABLES
**********************/
/**********************
* MACROS
**********************/
/**********************
* GLOBAL FUNCTIONS
**********************/
// From github.com/jeremyjh/ESP32_TFT_library
// From github.com/mvturnho/ILI9488-lvgl-ESP32-WROVER-B
void ili9488_init(void)
{
lcd_init_cmd_t ili_init_cmds[]={
{ILI9488_CMD_SLEEP_OUT, {0x00}, 0x80},
{ILI9488_CMD_POSITIVE_GAMMA_CORRECTION, {0x00, 0x03, 0x09, 0x08, 0x16, 0x0A, 0x3F, 0x78, 0x4C, 0x09, 0x0A, 0x08, 0x16, 0x1A, 0x0F}, 15},
{ILI9488_CMD_NEGATIVE_GAMMA_CORRECTION, {0x00, 0x16, 0x19, 0x03, 0x0F, 0x05, 0x32, 0x45, 0x46, 0x04, 0x0E, 0x0D, 0x35, 0x37, 0x0F}, 15},
{ILI9488_CMD_POWER_CONTROL_1, {0x17, 0x15}, 2},
{ILI9488_CMD_POWER_CONTROL_2, {0x41}, 1},
{ILI9488_CMD_VCOM_CONTROL_1, {0x00, 0x12, 0x80}, 3},
{ILI9488_CMD_MEMORY_ACCESS_CONTROL, {(0x20 | 0x08)}, 1},
{ILI9488_CMD_COLMOD_PIXEL_FORMAT_SET, {0x66}, 1},
{ILI9488_CMD_INTERFACE_MODE_CONTROL, {0x00}, 1},
{ILI9488_CMD_FRAME_RATE_CONTROL_NORMAL, {0xA0}, 1},
{ILI9488_CMD_DISPLAY_INVERSION_CONTROL, {0x02}, 1},
{ILI9488_CMD_DISPLAY_FUNCTION_CONTROL, {0x02, 0x02}, 2},
{ILI9488_CMD_SET_IMAGE_FUNCTION, {0x00}, 1},
{ILI9488_CMD_WRITE_CTRL_DISPLAY, {0x28}, 1},
{ILI9488_CMD_WRITE_DISPLAY_BRIGHTNESS, {0x7F}, 1},
{ILI9488_CMD_ADJUST_CONTROL_3, {0xA9, 0x51, 0x2C, 0x02}, 4},
{ILI9488_CMD_DISPLAY_ON, {0x00}, 0x80},
{0, {0}, 0xff},
};
//Initialize non-SPI GPIOs
gpio_pad_select_gpio(ILI9488_DC);
gpio_set_direction(ILI9488_DC, GPIO_MODE_OUTPUT);
#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
LV_LOG_INFO(TAG, "ILI9488 initialization.");
// Exit sleep
ili9488_send_cmd(0x01); /* Software reset */
vTaskDelay(100 / portTICK_RATE_MS);
//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);
if (ili_init_cmds[cmd].databytes & 0x80) {
vTaskDelay(100 / portTICK_RATE_MS);
}
cmd++;
}
ili9488_set_orientation(CONFIG_LV_DISPLAY_ORIENTATION);
}
// Flush function based on mvturnho repo
void ili9488_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);
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) LV_LOG_WARN(TAG, "Could not allocate enough DMA memory!");
} while (mybuf == NULL);
uint32_t LD = 0;
uint32_t j = 0;
for (uint32_t i = 0; i < size; i++) {
LD = buffer_16bit[i].full;
mybuf[j] = (uint8_t) (((LD & 0xF800) >> 8) | ((LD & 0x8000) >> 13));
j++;
mybuf[j] = (uint8_t) ((LD & 0x07E0) >> 3);
j++;
mybuf[j] = (uint8_t) (((LD & 0x001F) << 3) | ((LD & 0x0010) >> 2));
j++;
}
/* Column addresses */
uint8_t xb[] = {
(uint8_t) (area->x1 >> 8) & 0xFF,
(uint8_t) (area->x1) & 0xFF,
(uint8_t) (area->x2 >> 8) & 0xFF,
(uint8_t) (area->x2) & 0xFF,
};
/* Page addresses */
uint8_t yb[] = {
(uint8_t) (area->y1 >> 8) & 0xFF,
(uint8_t) (area->y1) & 0xFF,
(uint8_t) (area->y2 >> 8) & 0xFF,
(uint8_t) (area->y2) & 0xFF,
};
/*Column addresses*/
ili9488_send_cmd(ILI9488_CMD_COLUMN_ADDRESS_SET);
ili9488_send_data(xb, 4);
/*Page addresses*/
ili9488_send_cmd(ILI9488_CMD_PAGE_ADDRESS_SET);
ili9488_send_data(yb, 4);
/*Memory write*/
ili9488_send_cmd(ILI9488_CMD_MEMORY_WRITE);
ili9488_send_color((void *) mybuf, size * 3);
heap_caps_free(mybuf);
}
/**********************
* STATIC FUNCTIONS
**********************/
static void ili9488_send_cmd(uint8_t cmd)
{
disp_wait_for_pending_transactions();
gpio_set_level(ILI9488_DC, 0); /*Command mode*/
disp_spi_send_data(&cmd, 1);
}
static void ili9488_send_data(void * data, uint16_t length)
{
disp_wait_for_pending_transactions();
gpio_set_level(ILI9488_DC, 1); /*Data mode*/
disp_spi_send_data(data, length);
}
static void ili9488_send_color(void * data, uint16_t length)
{
disp_wait_for_pending_transactions();
gpio_set_level(ILI9488_DC, 1); /*Data mode*/
disp_spi_send_colors(data, length);
}
static void ili9488_set_orientation(uint8_t orientation)
{
assert(orientation < 4);
const char *orientation_str[] = {
"PORTRAIT", "PORTRAIT_INVERTED", "LANDSCAPE", "LANDSCAPE_INVERTED"
};
LV_LOG_INFO(TAG, "Display orientation: %s", orientation_str[orientation]);
const uint8_t data[] = {0x48, 0x88, 0x28, 0xE8};
LV_LOG_INFO(TAG, "0x36 command value: 0x%02X", data[orientation]);
ili9488_send_cmd(0x36);
ili9488_send_data((void *) &data[orientation], 1);
}