214 lines
6 KiB
C
214 lines
6 KiB
C
/**
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* @file ili9488.c
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*/
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/*********************
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* INCLUDES
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*********************/
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#include "ili9488.h"
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#include "disp_spi.h"
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#include "driver/gpio.h"
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#include "esp_log.h"
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#include "esp_heap_caps.h"
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#include "freertos/FreeRTOS.h"
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#include "freertos/task.h"
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/*********************
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* DEFINES
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*********************/
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#define TAG "ILI9488"
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/**********************
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* TYPEDEFS
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**********************/
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/*The LCD needs a bunch of command/argument values to be initialized. They are stored in this struct. */
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typedef struct {
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uint8_t cmd;
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uint8_t data[16];
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uint8_t databytes; //No of data in data; bit 7 = delay after set; 0xFF = end of cmds.
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} lcd_init_cmd_t;
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/**********************
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* STATIC PROTOTYPES
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**********************/
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static void ili9488_set_orientation(uint8_t orientation);
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static void ili9488_send_cmd(uint8_t cmd);
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static void ili9488_send_data(void * data, uint16_t length);
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static void ili9488_send_color(void * data, uint16_t length);
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/**********************
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* STATIC VARIABLES
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**********************/
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/**********************
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* MACROS
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**********************/
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/**********************
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* GLOBAL FUNCTIONS
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**********************/
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// From github.com/jeremyjh/ESP32_TFT_library
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// From github.com/mvturnho/ILI9488-lvgl-ESP32-WROVER-B
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void ili9488_init(void)
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{
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lcd_init_cmd_t ili_init_cmds[]={
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{ILI9488_CMD_SLEEP_OUT, {0x00}, 0x80},
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{ILI9488_CMD_POSITIVE_GAMMA_CORRECTION, {0x00, 0x03, 0x09, 0x08, 0x16, 0x0A, 0x3F, 0x78, 0x4C, 0x09, 0x0A, 0x08, 0x16, 0x1A, 0x0F}, 15},
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{ILI9488_CMD_NEGATIVE_GAMMA_CORRECTION, {0x00, 0x16, 0x19, 0x03, 0x0F, 0x05, 0x32, 0x45, 0x46, 0x04, 0x0E, 0x0D, 0x35, 0x37, 0x0F}, 15},
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{ILI9488_CMD_POWER_CONTROL_1, {0x17, 0x15}, 2},
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{ILI9488_CMD_POWER_CONTROL_2, {0x41}, 1},
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{ILI9488_CMD_VCOM_CONTROL_1, {0x00, 0x12, 0x80}, 3},
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{ILI9488_CMD_MEMORY_ACCESS_CONTROL, {(0x20 | 0x08)}, 1},
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{ILI9488_CMD_COLMOD_PIXEL_FORMAT_SET, {0x66}, 1},
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{ILI9488_CMD_INTERFACE_MODE_CONTROL, {0x00}, 1},
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{ILI9488_CMD_FRAME_RATE_CONTROL_NORMAL, {0xA0}, 1},
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{ILI9488_CMD_DISPLAY_INVERSION_CONTROL, {0x02}, 1},
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{ILI9488_CMD_DISPLAY_FUNCTION_CONTROL, {0x02, 0x02}, 2},
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{ILI9488_CMD_SET_IMAGE_FUNCTION, {0x00}, 1},
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{ILI9488_CMD_WRITE_CTRL_DISPLAY, {0x28}, 1},
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{ILI9488_CMD_WRITE_DISPLAY_BRIGHTNESS, {0x7F}, 1},
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{ILI9488_CMD_ADJUST_CONTROL_3, {0xA9, 0x51, 0x2C, 0x02}, 4},
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{ILI9488_CMD_DISPLAY_ON, {0x00}, 0x80},
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{0, {0}, 0xff},
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};
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//Initialize non-SPI GPIOs
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gpio_pad_select_gpio(ILI9488_DC);
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gpio_set_direction(ILI9488_DC, GPIO_MODE_OUTPUT);
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#if ILI9488_USE_RST
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gpio_pad_select_gpio(ILI9488_RST);
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gpio_set_direction(ILI9488_RST, GPIO_MODE_OUTPUT);
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//Reset the display
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gpio_set_level(ILI9488_RST, 0);
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vTaskDelay(100 / portTICK_RATE_MS);
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gpio_set_level(ILI9488_RST, 1);
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vTaskDelay(100 / portTICK_RATE_MS);
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#endif
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ESP_LOGI(TAG, "ILI9488 initialization.");
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// Exit sleep
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ili9488_send_cmd(0x01); /* Software reset */
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vTaskDelay(100 / portTICK_RATE_MS);
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//Send all the commands
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uint16_t cmd = 0;
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while (ili_init_cmds[cmd].databytes!=0xff) {
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ili9488_send_cmd(ili_init_cmds[cmd].cmd);
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ili9488_send_data(ili_init_cmds[cmd].data, ili_init_cmds[cmd].databytes&0x1F);
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if (ili_init_cmds[cmd].databytes & 0x80) {
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vTaskDelay(100 / portTICK_RATE_MS);
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}
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cmd++;
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}
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ili9488_set_orientation(CONFIG_LV_DISPLAY_ORIENTATION);
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}
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// Flush function based on mvturnho repo
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void ili9488_flush(lv_disp_drv_t * drv, const lv_area_t * area, lv_color_t * color_map)
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{
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uint32_t size = lv_area_get_width(area) * lv_area_get_height(area);
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lv_color16_t *buffer_16bit = (lv_color16_t *) color_map;
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uint8_t *mybuf;
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do {
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mybuf = (uint8_t *) heap_caps_malloc(3 * size * sizeof(uint8_t), MALLOC_CAP_DMA);
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if (mybuf == NULL) ESP_LOGW(TAG, "Could not allocate enough DMA memory!");
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} while (mybuf == NULL);
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uint32_t LD = 0;
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uint32_t j = 0;
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for (uint32_t i = 0; i < size; i++) {
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LD = buffer_16bit[i].full;
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mybuf[j] = (uint8_t) (((LD & 0xF800) >> 8) | ((LD & 0x8000) >> 13));
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j++;
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mybuf[j] = (uint8_t) ((LD & 0x07E0) >> 3);
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j++;
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mybuf[j] = (uint8_t) (((LD & 0x001F) << 3) | ((LD & 0x0010) >> 2));
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j++;
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}
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/* Column addresses */
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uint8_t xb[] = {
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(uint8_t) (area->x1 >> 8) & 0xFF,
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(uint8_t) (area->x1) & 0xFF,
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(uint8_t) (area->x2 >> 8) & 0xFF,
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(uint8_t) (area->x2) & 0xFF,
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};
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/* Page addresses */
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uint8_t yb[] = {
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(uint8_t) (area->y1 >> 8) & 0xFF,
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(uint8_t) (area->y1) & 0xFF,
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(uint8_t) (area->y2 >> 8) & 0xFF,
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(uint8_t) (area->y2) & 0xFF,
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};
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/*Column addresses*/
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ili9488_send_cmd(ILI9488_CMD_COLUMN_ADDRESS_SET);
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ili9488_send_data(xb, 4);
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/*Page addresses*/
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ili9488_send_cmd(ILI9488_CMD_PAGE_ADDRESS_SET);
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ili9488_send_data(yb, 4);
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/*Memory write*/
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ili9488_send_cmd(ILI9488_CMD_MEMORY_WRITE);
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ili9488_send_color((void *) mybuf, size * 3);
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heap_caps_free(mybuf);
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}
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/**********************
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* STATIC FUNCTIONS
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**********************/
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static void ili9488_send_cmd(uint8_t cmd)
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{
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disp_wait_for_pending_transactions();
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gpio_set_level(ILI9488_DC, 0); /*Command mode*/
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disp_spi_send_data(&cmd, 1);
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}
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static void ili9488_send_data(void * data, uint16_t length)
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{
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disp_wait_for_pending_transactions();
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gpio_set_level(ILI9488_DC, 1); /*Data mode*/
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disp_spi_send_data(data, length);
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}
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static void ili9488_send_color(void * data, uint16_t length)
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{
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disp_wait_for_pending_transactions();
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gpio_set_level(ILI9488_DC, 1); /*Data mode*/
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disp_spi_send_colors(data, length);
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}
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static void ili9488_set_orientation(uint8_t orientation)
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{
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// ESP_ASSERT(orientation < 4);
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const char *orientation_str[] = {
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"PORTRAIT", "PORTRAIT_INVERTED", "LANDSCAPE", "LANDSCAPE_INVERTED"
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};
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ESP_LOGI(TAG, "Display orientation: %s", orientation_str[orientation]);
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#if defined (CONFIG_LV_PREDEFINED_DISPLAY_NONE)
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uint8_t data[] = {0x48, 0x88, 0x28, 0xE8};
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#endif
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ESP_LOGI(TAG, "0x36 command value: 0x%02X", data[orientation]);
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ili9488_send_cmd(0x36);
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ili9488_send_data((void *) &data[orientation], 1);
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}
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