lvgl_esp32_drivers/lvgl_tft/ili9486.c
2023-03-20 20:11:25 -07:00

215 lines
5.3 KiB
C

/**
* @file mpi3501.c
*
*/
/*********************
* INCLUDES
*********************/
#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
**********************/
/*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 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 VARIABLES
**********************/
/**********************
* MACROS
**********************/
/**********************
* GLOBAL FUNCTIONS
**********************/
void ili9486_init(void)
{
lcd_init_cmd_t ili_init_cmds[]={
{0x11, {0}, 0x80},
{0x3A, {0x55}, 1},
{0x2C, {0x44}, 1},
{0xC5, {0x00, 0x00, 0x00, 0x00}, 4},
{0xE0, {0x0F, 0x1F, 0x1C, 0x0C, 0x0F, 0x08, 0x48, 0x98, 0x37, 0x0A, 0x13, 0x04, 0x11, 0x0D, 0x00}, 15},
{0XE1, {0x0F, 0x32, 0x2E, 0x0B, 0x0D, 0x05, 0x47, 0x75, 0x37, 0x06, 0x10, 0x03, 0x24, 0x20, 0x00}, 15},
{0x20, {0}, 0}, /* display inversion OFF */
{0x36, {0x48}, 1},
{0x29, {0}, 0x80}, /* display on */
{0x00, {0}, 0xff},
};
#if ILI9486_BCKL == 15
gpio_config_t io_conf;
io_conf.intr_type = GPIO_PIN_INTR_DISABLE;
io_conf.mode = GPIO_MODE_OUTPUT;
io_conf.pin_bit_mask = GPIO_SEL_15;
io_conf.pull_down_en = GPIO_PULLDOWN_DISABLE;
io_conf.pull_up_en = GPIO_PULLUP_DISABLE;
gpio_config(&io_conf);
#endif
//Initialize non-SPI GPIOs
gpio_reset_pin(ILI9486_DC);
gpio_set_direction(ILI9486_DC, GPIO_MODE_OUTPUT);
gpio_reset_pin(ILI9486_RST);
gpio_set_direction(ILI9486_RST, GPIO_MODE_OUTPUT);
#if ILI9486_ENABLE_BACKLIGHT_CONTROL
gpio_reset_pin(ILI9486_BCKL);
gpio_set_direction(ILI9486_BCKL, GPIO_MODE_OUTPUT);
#endif
//Reset the display
gpio_set_level(ILI9486_RST, 0);
vTaskDelay(100 / portTICK_PERIOD_MS);
gpio_set_level(ILI9486_RST, 1);
vTaskDelay(100 / portTICK_PERIOD_MS);
ESP_LOGI(TAG, "ILI9486 Initialization.");
//Send all the commands
uint16_t cmd = 0;
while (ili_init_cmds[cmd].databytes!=0xff) {
ili9486_send_cmd(ili_init_cmds[cmd].cmd);
ili9486_send_data(ili_init_cmds[cmd].data, ili_init_cmds[cmd].databytes&0x1F);
if (ili_init_cmds[cmd].databytes & 0x80) {
vTaskDelay(100 / portTICK_PERIOD_MS);
}
cmd++;
}
ili9486_enable_backlight(true);
ili9486_set_orientation(CONFIG_LV_DISPLAY_ORIENTATION);
}
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;
/*Column addresses*/
ili9486_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;
ili9486_send_data(data, 4);
/*Page addresses*/
ili9486_send_cmd(0x2B);
data[0] = (area->y1 >> 8) & 0xFF;
data[1] = area->y1 & 0xFF;
data[2] = (area->y2 >> 8) & 0xFF;
data[3] = area->y2 & 0xFF;
ili9486_send_data(data, 4);
/*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);
}
void ili9486_enable_backlight(bool backlight)
{
#if ILI9486_ENABLE_BACKLIGHT_CONTROL
ESP_LOGI(TAG, "%s backlight.", backlight ? "Enabling" : "Disabling");
uint32_t tmp = 0;
#if (ILI9486_BCKL_ACTIVE_LVL==1)
tmp = backlight ? 1 : 0;
#else
tmp = backlight ? 0 : 1;
#endif
gpio_set_level(ILI9486_BCKL, tmp);
#endif
}
/**********************
* STATIC FUNCTIONS
**********************/
static void ili9486_send_cmd(uint8_t cmd)
{
uint8_t to16bit[] = {
0x00, cmd
};
disp_wait_for_pending_transactions();
gpio_set_level(ILI9486_DC, 0); /*Command mode*/
disp_spi_send_data(to16bit, sizeof to16bit);
}
static void ili9486_send_data(void * data, uint16_t length)
{
uint32_t i;
uint8_t to16bit[32];
uint8_t * dummy = data;
for(i=0; i < (length); i++)
{
to16bit[2*i+1] = dummy[i];
to16bit[2*i] = 0x00;
}
disp_wait_for_pending_transactions();
gpio_set_level(ILI9486_DC, 1); /*Data mode*/
disp_spi_send_data(to16bit, (length*2));
}
static void ili9486_send_color(void * data, uint16_t length)
{
disp_wait_for_pending_transactions();
gpio_set_level(ILI9486_DC, 1); /*Data mode*/
disp_spi_send_colors(data, length);
}
static void ili9486_set_orientation(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]);
#if defined (CONFIG_LV_PREDEFINED_DISPLAY_NONE)
uint8_t data[] = {0x48, 0x88, 0x28, 0xE8};
#endif
ESP_LOGI(TAG, "0x36 command value: 0x%02X", data[orientation]);
ili9486_send_cmd(0x36);
ili9486_send_data((void *) &data[orientation], 1);
}