Add ST7796S driver
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242
st7796s.c
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242
st7796s.c
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/**
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* @file st7796s.c
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*
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*/
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/*********************
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* INCLUDES
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*********************/
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#include "st7796s.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 "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 "ST7796S"
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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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{
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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 st7796s_set_orientation(uint8_t orientation);
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static void st7796s_send_cmd(uint8_t cmd);
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static void st7796s_send_data(void *data, uint16_t length);
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static void st7796s_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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void st7796s_init(void)
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{
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lcd_init_cmd_t init_cmds[] = {
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{0xCF, {0x00, 0x83, 0X30}, 3},
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{0xED, {0x64, 0x03, 0X12, 0X81}, 4},
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{0xE8, {0x85, 0x01, 0x79}, 3},
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{0xCB, {0x39, 0x2C, 0x00, 0x34, 0x02}, 5},
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{0xF7, {0x20}, 1},
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{0xEA, {0x00, 0x00}, 2},
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{0xC0, {0x26}, 1}, /*Power control*/
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{0xC1, {0x11}, 1}, /*Power control */
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{0xC5, {0x35, 0x3E}, 2}, /*VCOM control*/
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{0xC7, {0xBE}, 1}, /*VCOM control*/
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{0x36, {0x28}, 1}, /*Memory Access Control*/
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{0x3A, {0x55}, 1}, /*Pixel Format Set*/
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{0xB1, {0x00, 0x1B}, 2},
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{0xF2, {0x08}, 1},
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{0x26, {0x01}, 1},
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{0xE0, {0x1F, 0x1A, 0x18, 0x0A, 0x0F, 0x06, 0x45, 0X87, 0x32, 0x0A, 0x07, 0x02, 0x07, 0x05, 0x00}, 15},
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{0XE1, {0x00, 0x25, 0x27, 0x05, 0x10, 0x09, 0x3A, 0x78, 0x4D, 0x05, 0x18, 0x0D, 0x38, 0x3A, 0x1F}, 15},
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{0x2A, {0x00, 0x00, 0x00, 0xEF}, 4},
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{0x2B, {0x00, 0x00, 0x01, 0x3f}, 4},
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{0x2C, {0}, 0},
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{0xB7, {0x07}, 1},
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{0xB6, {0x0A, 0x82, 0x27, 0x00}, 4},
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{0x11, {0}, 0x80},
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{0x29, {0}, 0x80},
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{0, {0}, 0xff},
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};
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#if ST7796S_BCKL == 15
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gpio_config_t io_conf;
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io_conf.intr_type = GPIO_PIN_INTR_DISABLE;
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io_conf.mode = GPIO_MODE_OUTPUT;
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io_conf.pin_bit_mask = GPIO_SEL_15;
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io_conf.pull_down_en = GPIO_PULLDOWN_DISABLE;
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io_conf.pull_up_en = GPIO_PULLUP_DISABLE;
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gpio_config(&io_conf);
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#endif
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//Initialize non-SPI GPIOs
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gpio_pad_select_gpio(ST7796S_DC);
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gpio_set_direction(ST7796S_DC, GPIO_MODE_OUTPUT);
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gpio_pad_select_gpio(ST7796S_RST);
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gpio_set_direction(ST7796S_RST, GPIO_MODE_OUTPUT);
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#if ST7796S_ENABLE_BACKLIGHT_CONTROL
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gpio_pad_select_gpio(ST7796S_BCKL);
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gpio_set_direction(ST7796S_BCKL, GPIO_MODE_OUTPUT);
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#endif
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//Reset the display
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gpio_set_level(ST7796S_RST, 0);
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vTaskDelay(100 / portTICK_RATE_MS);
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gpio_set_level(ST7796S_RST, 1);
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vTaskDelay(100 / portTICK_RATE_MS);
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ESP_LOGI(TAG, "Initialization.");
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//Send all the commands
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uint16_t cmd = 0;
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while (init_cmds[cmd].databytes != 0xff)
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{
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st7796s_send_cmd(init_cmds[cmd].cmd);
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st7796s_send_data(init_cmds[cmd].data, init_cmds[cmd].databytes & 0x1F);
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if (init_cmds[cmd].databytes & 0x80)
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{
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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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st7796s_enable_backlight(true);
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st7796s_set_orientation(CONFIG_LV_DISPLAY_ORIENTATION);
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#if ST7796S_INVERT_COLORS == 1
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st7796s_send_cmd(0x21);
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#else
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st7796s_send_cmd(0x20);
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#endif
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}
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void st7796s_flush(lv_disp_drv_t *drv, const lv_area_t *area, lv_color_t *color_map)
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{
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uint8_t data[4];
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/*Column addresses*/
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st7796s_send_cmd(0x2A);
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data[0] = (area->x1 >> 8) & 0xFF;
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data[1] = area->x1 & 0xFF;
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data[2] = (area->x2 >> 8) & 0xFF;
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data[3] = area->x2 & 0xFF;
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st7796s_send_data(data, 4);
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/*Page addresses*/
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st7796s_send_cmd(0x2B);
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data[0] = (area->y1 >> 8) & 0xFF;
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data[1] = area->y1 & 0xFF;
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data[2] = (area->y2 >> 8) & 0xFF;
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data[3] = area->y2 & 0xFF;
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st7796s_send_data(data, 4);
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/*Memory write*/
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st7796s_send_cmd(0x2C);
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uint32_t size = lv_area_get_width(area) * lv_area_get_height(area);
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st7796s_send_color((void *)color_map, size * 2);
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}
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void st7796s_enable_backlight(bool backlight)
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{
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#if ST7796S_ENABLE_BACKLIGHT_CONTROL
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ESP_LOGI(TAG, "%s backlight.", backlight ? "Enabling" : "Disabling");
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uint32_t tmp = 0;
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#if (ST7796S_BCKL_ACTIVE_LVL == 1)
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tmp = backlight ? 1 : 0;
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#else
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tmp = backlight ? 0 : 1;
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#endif
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gpio_set_level(ST7796S_BCKL, tmp);
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#endif
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}
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void st7796s_sleep_in()
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{
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uint8_t data[] = {0x08};
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st7796s_send_cmd(0x10);
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st7796s_send_data(&data, 1);
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}
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void st7796s_sleep_out()
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{
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uint8_t data[] = {0x08};
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st7796s_send_cmd(0x11);
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st7796s_send_data(&data, 1);
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}
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/**********************
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* STATIC FUNCTIONS
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**********************/
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static void st7796s_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(ST7796S_DC, 0); /*Command mode*/
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disp_spi_send_data(&cmd, 1);
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}
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static void st7796s_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(ST7796S_DC, 1); /*Data mode*/
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disp_spi_send_data(data, length);
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}
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static void st7796s_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(ST7796S_DC, 1); /*Data mode*/
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disp_spi_send_colors(data, length);
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}
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static void st7796s_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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ESP_LOGI(TAG, "Display orientation: %s", orientation_str[orientation]);
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#if defined CONFIG_LV_PREDEFINED_DISPLAY_M5STACK
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uint8_t data[] = {0x68, 0x68, 0x08, 0x08};
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#elif defined(CONFIG_LV_PREDEFINED_DISPLAY_WROVER4)
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uint8_t data[] = {0x4C, 0x88, 0x28, 0xE8};
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#elif defined(CONFIG_LV_PREDEFINED_DISPLAY_WT32_SC01)
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uint8_t data[] = {0x48, 0x88, 0x28, 0xE8};
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#elif 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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st7796s_send_cmd(0x36);
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st7796s_send_data((void *)&data[orientation], 1);
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}
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131
st7796s.h
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131
st7796s.h
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/**
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* @file st7796s.h
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*/
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#ifndef ST7796S_H
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#define ST7796S_H
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#ifdef __cplusplus
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extern "C"
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{
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#endif
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/*********************
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* INCLUDES
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*********************/
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#include <stdbool.h>
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#include <stdint.h>
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#ifdef LV_LVGL_H_INCLUDE_SIMPLE
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#include "lvgl.h"
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#else
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#include "lvgl/lvgl.h"
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#endif
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#include "../lvgl_helpers.h"
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/*********************
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* DEFINES
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*********************/
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#define ST7796S_DC CONFIG_LV_DISP_PIN_DC
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#define ST7796S_RST CONFIG_LV_DISP_PIN_RST
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#define ST7796S_BCKL CONFIG_LV_DISP_PIN_BCKL
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#define ST7796S_ENABLE_BACKLIGHT_CONTROL CONFIG_LV_ENABLE_BACKLIGHT_CONTROL
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#define ST7796S_INVERT_COLORS CONFIG_LV_INVERT_COLORS
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#define ST7796S_DISPLAY_ORIENTATION CONFIG_LV_DISPLAY_ORIENTATION
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#if CONFIG_LV_BACKLIGHT_ACTIVE_LVL
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#define ST7796S_BCKL_ACTIVE_LVL 1
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#else
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#define ST7796S_BCKL_ACTIVE_LVL 0
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#endif
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/*******************
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* ST7796S REGS
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*********************/
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/* MIPI DCS Type1 */
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#define ST7796S_CMD_NOP 0x00
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#define ST7796S_CMD_SOFTWARE_RESET 0x01
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#define ST7796S_CMD_READ_DISP_POWER_MODE 0x0A
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#define ST7796S_CMD_READ_DISP_MADCTRL 0x0B // bits 7:3 only
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#define ST7796S_CMD_READ_DISP_PIXEL_FORMAT 0x0C
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#define ST7796S_CMD_READ_DISP_IMAGE_MODE 0x0D
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#define ST7796S_CMD_READ_DISP_SIGNAL_MODE 0x0E
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#define ST7796S_CMD_READ_DISP_SELF_DIAGNOSTIC 0x0F // bits 7:6 only
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#define ST7796S_CMD_ENTER_SLEEP_MODE 0x10
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#define ST7796S_CMD_SLEEP_OUT 0x11
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#define ST7796S_CMD_PARTIAL_MODE_ON 0x12
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#define ST7796S_CMD_NORMAL_DISP_MODE_ON 0x13
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#define ST7796S_CMD_DISP_INVERSION_OFF 0x20
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#define ST7796S_CMD_DISP_INVERSION_ON 0x21
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#define ST7796S_CMD_DISPLAY_OFF 0x28
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#define ST7796S_CMD_DISPLAY_ON 0x29
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#define ST7796S_CMD_COLUMN_ADDRESS_SET 0x2A
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#define ST7796S_CMD_PAGE_ADDRESS_SET 0x2B
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#define ST7796S_CMD_MEMORY_WRITE 0x2C
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#define ST7796S_CMD_MEMORY_READ 0x2E
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#define ST7796S_CMD_PARTIAL_AREA 0x30
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#define ST7796S_CMD_VERT_SCROLL_DEFINITION 0x33
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#define ST7796S_CMD_TEARING_EFFECT_LINE_OFF 0x34
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#define ST7796S_CMD_TEARING_EFFECT_LINE_ON 0x35
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#define ST7796S_CMD_MEMORY_ACCESS_CONTROL 0x36 // bits 7:3,1:0 only
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#define ST7796S_CMD_VERT_SCROLL_START_ADDRESS 0x37
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#define ST7796S_CMD_IDLE_MODE_OFF 0x38
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#define ST7796S_CMD_IDLE_MODE_ON 0x39
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#define ST7796S_CMD_COLMOD_PIXEL_FORMAT_SET 0x3A
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#define ST7796S_CMD_WRITE_MEMORY_CONTINUE 0x3C
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#define ST7796S_CMD_READ_MEMORY_CONTINUE 0x3E
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#define ST7796S_CMD_SET_TEAR_SCANLINE 0x44
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#define ST7796S_CMD_GET_SCANLINE 0x45
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#define ST7796S_DDB_START 0xA1
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#define ST7796S_DDB_CONTINUE 0xA8
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/* other */
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#define ST7796S_CMD_ACCESS_PROTECT 0xB0
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#define ST7796S_CMD_LOW_POWER_CONTROL 0xB1
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#define ST7796S_CMD_FRAME_MEMORY_ACCESS 0xB3
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#define ST7796S_CMD_DISPLAY_MODE 0xB4
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#define ST7796S_CMD_DEVICE_CODE 0xBF
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#define ST7796S_CMD_PANEL_DRIVE 0xC0
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#define ST7796S_CMD_DISP_TIMING_NORMAL 0xC1
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#define ST7796S_CMD_DISP_TIMING_PARTIAL 0xC2
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#define ST7796S_CMD_DISP_TIMING_IDLE 0xC3
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#define ST7796S_CMD_FRAME_RATE 0xC5
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#define ST7796S_CMD_INTERFACE_CONTROL 0xC6
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#define ST7796S_CMD_GAMMA_SETTING 0xC8
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#define ST7796S_CMD_POWER_SETTING 0xD0
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#define ST7796S_CMD_VCOM_CONTROL 0xD1
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#define ST7796S_CMD_POWER_CONTROL_NORMAL 0xD2
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#define ST7796S_CMD_POWER_CONTROL_IDEL 0xD3
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#define ST7796S_CMD_POWER_CONTROL_PARTIAL 0xD4
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#define ST7796S_CMD_NVMEM_WRITE 0xE0
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#define ST7796S_CMD_NVMEM_PROTECTION_KEY 0xE1
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#define ST7796S_CMD_NVMEM_STATUS_READ 0xE2
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#define ST7796S_CMD_NVMEM_PROTECTION 0xE3
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/**********************
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* TYPEDEFS
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**********************/
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/**********************
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* GLOBAL PROTOTYPES
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**********************/
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void st7796s_init(void);
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void st7796s_flush(lv_disp_drv_t *drv, const lv_area_t *area, lv_color_t *color_map);
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void st7796s_enable_backlight(bool backlight);
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/**********************
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* MACROS
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**********************/
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#ifdef __cplusplus
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} /* extern "C" */
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#endif
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#endif /*ST7796S_H*/
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