uploaded 1 week ago
ESP LCD ST77922(SPI & QSPI & RGB & MIPI-DSI)
readme
# ESP LCD ST77922
[](https://components.espressif.com/components/espressif/esp_lcd_st77922)
Implementation of the ST77922 LCD controller with [esp_lcd](https://docs.espressif.com/projects/esp-idf/en/latest/esp32s3/api-reference/peripherals/lcd.html) component.
| LCD controller | Communication interface | Component name | Link to datasheet |
| :------------: | :---------------------: | :------------: | :---------------------------------------------------------------------------: |
| ST77922 | SPI/QSPI/MIPI-DSI | esp_lcd_st77922 | [PDF](https://dl.espressif.com/AE/esp-iot-solution/ST77922_SPEC_V0.1.pdf) |
**Note**: MIPI-DSI interface only supports ESP-IDF v5.3 and above versions.
For more information on LCD, please refer to the [LCD documentation](https://docs.espressif.com/projects/esp-iot-solution/en/latest/display/lcd/index.html).
## Add to project
Packages from this repository are uploaded to [Espressif's component service](https://components.espressif.com/).
You can add them to your project via `idf.py add-dependancy`, e.g.
```
idf.py add-dependency "espressif/esp_lcd_st77922"
```
Alternatively, you can create `idf_component.yml`. More is in [Espressif's documentation](https://docs.espressif.com/projects/esp-idf/en/latest/esp32/api-guides/tools/idf-component-manager.html).
## Initialization Code
### SPI Interface
```c
ESP_LOGI(TAG, "Initialize SPI bus");
const spi_bus_config_t bus_config = ST77922_PANEL_BUS_SPI_CONFIG(EXAMPLE_PIN_NUM_LCD_PCLK, EXAMPLE_PIN_NUM_LCD_DATA0, EXAMPLE_LCD_H_RES * 80 * sizeof(uint16_t));
ESP_ERROR_CHECK(spi_bus_initialize(EXAMPLE_LCD_HOST, &bus_config, SPI_DMA_CH_AUTO));
ESP_LOGI(TAG, "Install panel IO");
esp_lcd_panel_io_handle_t io_handle = NULL;
const esp_lcd_panel_io_spi_config_t io_config = ST77922_PANEL_IO_SPI_CONFIG(EXAMPLE_PIN_NUM_LCD_CS, EXAMPLE_PIN_NUM_LCD_DC,
callback, &callback_data);
ESP_ERROR_CHECK(esp_lcd_new_panel_io_spi((esp_lcd_spi_bus_handle_t)EXAMPLE_LCD_HOST, &io_config, &io_handle));
/**
* Uncomment these line if use custom initialization commands.
* The array should be declared as static const and positioned outside the function.
*/
// static const st77922_lcd_init_cmd_t lcd_init_cmds[] = {
// // {cmd, { data }, data_size, delay_ms}
// {0x28, (uint8_t []){0x00}, 0, 0},
// {0x10, (uint8_t []){0x00}, 0, 0},
// {0x2A, (uint8_t []){0x00, 0x00, 0x02, 0x13}, 4, 0},
// {0x2B, (uint8_t []){0x00, 0x00, 0x01, 0x2B}, 4, 0},
// ...
// };
ESP_LOGI(TAG, "Install st77922 panel driver");
esp_lcd_panel_handle_t panel_handle = NULL;
st77922_vendor_config_t vendor_config = {
// .init_cmds = lcd_init_cmds, // Uncomment these line if use custom initialization commands
// .init_cmds_size = sizeof(lcd_init_cmds) / sizeof(st77922_lcd_init_cmd_t),
.flags = {
.use_qspi_interface = 0,
},
};
const esp_lcd_panel_dev_config_t panel_config = {
.reset_gpio_num = EXAMPLE_PIN_NUM_LCD_RST,
.rgb_ele_order = LCD_RGB_ELEMENT_ORDER_RGB, // Implemented by LCD command `36h`
.bits_per_pixel = EXAMPLE_LCD_BIT_PER_PIXEL, // Implemented by LCD command `3Ah` (16/18/24)
.vendor_config = &vendor_config,
};
ESP_ERROR_CHECK(esp_lcd_new_panel_st77922(io_handle, &panel_config, &panel_handle));
esp_lcd_panel_reset(panel_handle);
esp_lcd_panel_init(panel_handle);
esp_lcd_panel_disp_on_off(panel_handle, true);
```
### QSPI Interface
```c
ESP_LOGI(TAG, "Initialize QSPI bus");
const esp_lcd_panel_io_spi_config_t io_config = ST77922_PANEL_BUS_QSPI_CONFIG(EXAMPLE_PIN_NUM_LCD_PCLK,
EXAMPLE_PIN_NUM_LCD_DATA0,
EXAMPLE_PIN_NUM_LCD_DATA1,
EXAMPLE_PIN_NUM_LCD_DATA2,
EXAMPLE_PIN_NUM_LCD_DATA3
EXAMPLE_LCD_H_RES * 80 * sizeof(uint16_t));
ESP_ERROR_CHECK(spi_bus_initialize(EXAMPLE_LCD_HOST, &buscfg, SPI_DMA_CH_AUTO));
ESP_LOGI(TAG, "Install panel IO");
esp_lcd_panel_io_handle_t io_handle = NULL;
const esp_lcd_panel_io_spi_config_t io_config = ST77922_PANEL_IO_QSPI_CONFIG(EXAMPLE_PIN_NUM_LCD_CS, callback, &callback_data);
ESP_ERROR_CHECK(esp_lcd_new_panel_io_spi((esp_lcd_spi_bus_handle_t)EXAMPLE_LCD_HOST, &io_config, &io_handle));
/**
* Uncomment these line if use custom initialization commands.
* The array should be declared as static const and positioned outside the function.
*/
// static const st77922_lcd_init_cmd_t lcd_init_cmds[] = {
// // {cmd, { data }, data_size, delay_ms}
// {0x28, (uint8_t []){0x00}, 0, 0},
// {0x10, (uint8_t []){0x00}, 0, 0},
// {0x2A, (uint8_t []){0x00, 0x00, 0x02, 0x13}, 4, 0},
// {0x2B, (uint8_t []){0x00, 0x00, 0x01, 0x2B}, 4, 0},
// ...
// };
ESP_LOGI(TAG, "Install st77922 panel driver");
esp_lcd_panel_handle_t panel_handle = NULL;
st77922_vendor_config_t vendor_config = {
// .init_cmds = lcd_init_cmds, // Uncomment these line if use custom initialization commands
// .init_cmds_size = sizeof(lcd_init_cmds) / sizeof(st77922_lcd_init_cmd_t),
.flags = {
.use_qspi_interface = 1,
},
};
const esp_lcd_panel_dev_config_t panel_config = {
.reset_gpio_num = EXAMPLE_PIN_NUM_LCD_RST,
.rgb_ele_order = LCD_RGB_ELEMENT_ORDER_RGB, // Implemented by LCD command `36h`
.bits_per_pixel = EXAMPLE_LCD_BIT_PER_PIXEL, // Implemented by LCD command `3Ah` (16/18/24)
.vendor_config = &vendor_config,
};
ESP_ERROR_CHECK(esp_lcd_new_panel_st77922(io_handle, &panel_config, &panel_handle));
esp_lcd_panel_reset(panel_handle);
esp_lcd_panel_init(panel_handle);
esp_lcd_panel_disp_on_off(panel_handle, true);
```
#### Notes
* When using `esp_panel_lcd_draw_bitmap()` to refresh the screen, ensure that both `x_start` and `x_end` are divisible by `4`. This is a requirement of ST77922. For LVGL, register the following function into `rounder_cb` of `lv_disp_drv_t` to round the coordinates.
```c
void lvgl_port_rounder_callback(struct _lv_disp_drv_t * disp_drv, lv_area_t * area)
{
uint16_t x1 = area->x1;
uint16_t x2 = area->x2;
// round the start of coordinate down to the nearest 4M number
area->x1 = (x1 >> 2) << 2;
// round the end of coordinate up to the nearest 4N+3 number
area->x2 = ((x2 >> 2) << 2) + 3;
}
```
### RGB Interface
```c
ESP_LOGI(TAG, "Install 3-wire SPI panel IO");
spi_line_config_t line_config = {
.cs_io_type = IO_TYPE_GPIO,
.cs_expander_pin = EXAMPLE_PIN_NUM_LCD_SPI_CS,
.scl_io_type = IO_TYPE_GPIO,
.scl_expander_pin = EXAMPLE_PIN_NUM_LCD_SPI_SCK,
.sda_io_type = IO_TYPE_GPIO,
.sda_expander_pin = EXAMPLE_PIN_NUM_LCD_SPI_SDO,
.io_expander = NULL,
};
esp_lcd_panel_io_3wire_spi_config_t io_config = ST77922_PANEL_IO_3WIRE_SPI_CONFIG(line_config, 0);
EXAMPLE_ESP_OK(esp_lcd_new_panel_io_3wire_spi(&io_config, &io_handle));
/**
* Uncomment these line if use custom initialization commands.
* The array should be declared as static const and positioned outside the function.
*/
// static const st77922_lcd_init_cmd_t lcd_init_cmds[] = {
// // {cmd, { data }, data_size, delay_ms}
// {0x28, (uint8_t []){0x00}, 0, 0},
// {0x10, (uint8_t []){0x00}, 0, 0},
// {0x2A, (uint8_t []){0x00, 0x00, 0x02, 0x13}, 4, 0},
// {0x2B, (uint8_t []){0x00, 0x00, 0x01, 0x2B}, 4, 0},
// ...
// };
ESP_LOGI(TAG, "Install st77922 panel driver");
esp_lcd_rgb_panel_config_t rgb_config = {
.clk_src = LCD_CLK_SRC_DEFAULT,
.psram_trans_align = 64,
.data_width = 8,
.bits_per_pixel = 24,
.de_gpio_num = EXAMPLE_PIN_NUM_LCD_RGB_DE,
.pclk_gpio_num = EXAMPLE_PIN_NUM_LCD_RGB_PCLK,
.vsync_gpio_num = EXAMPLE_PIN_NUM_LCD_RGB_VSYNC,
.hsync_gpio_num = EXAMPLE_PIN_NUM_LCD_RGB_HSYNC,
.disp_gpio_num = EXAMPLE_PIN_NUM_LCD_RGB_DISP,
.data_gpio_nums = {
EXAMPLE_PIN_NUM_LCD_RGB_DATA0,
EXAMPLE_PIN_NUM_LCD_RGB_DATA1,
EXAMPLE_PIN_NUM_LCD_RGB_DATA2,
EXAMPLE_PIN_NUM_LCD_RGB_DATA3,
EXAMPLE_PIN_NUM_LCD_RGB_DATA4,
EXAMPLE_PIN_NUM_LCD_RGB_DATA5,
EXAMPLE_PIN_NUM_LCD_RGB_DATA6,
EXAMPLE_PIN_NUM_LCD_RGB_DATA7,
},
.timings = ST77922_480_480_PANEL_60HZ_RGB_TIMING(),
.flags.fb_in_psram = 1,
.bounce_buffer_size_px = EXAMPLE_LCD_H_RES * 10,
};
rgb_config.timings.h_res = EXAMPLE_LCD_H_RES;
rgb_config.timings.v_res = EXAMPLE_LCD_V_RES;
st77922_vendor_config_t vendor_config = {
.rgb_config = &rgb_config,
.flags = {
.use_rgb_interface = 1,
.enable_io_multiplex = 0, /**
* Set to 1 if panel IO is no longer needed after LCD initialization.
* If the panel IO pins are sharing other pins of the RGB interface to save GPIOs,
* Please set it to 1 to release the pins.
*/
.mirror_by_cmd = 1, // Set to 0 if `enable_io_multiplex` is enabled
},
};
const esp_lcd_panel_dev_config_t panel_config = {
.reset_gpio_num = EXAMPLE_PIN_NUM_LCD_RST,
.rgb_ele_order = LCD_RGB_ELEMENT_ORDER_BGR,
.bits_per_pixel = EXAMPLE_LCD_BIT_PER_PIXEL,
.vendor_config = &vendor_config,
};
EXAMPLE_ESP_OK(esp_lcd_new_panel_st77922(io_handle, &panel_config, &panel_handle));
EXAMPLE_ESP_OK(esp_lcd_panel_reset(panel_handle));
EXAMPLE_ESP_OK(esp_lcd_panel_init(panel_handle));
EXAMPLE_ESP_OK(esp_lcd_panel_disp_on_off(panel_handle, true));
```
### MIPI Interface
```c
/**
* Uncomment these line if use custom initialization commands.
* The array should be declared as static const and positioned outside the function.
*/
// static const st77922_lcd_init_cmd_t lcd_init_cmds[] = {
// // cmd data data_size delay_ms
// {0xFF, (uint8_t []){0x77, 0x01, 0x00, 0x00, 0x13}, 5, 0},
// {0xEF, (uint8_t []){0x08}, 1, 0},
// {0xFF, (uint8_t []){0x77, 0x01, 0x00, 0x00, 0x10}, 5, 0},
// {0xC0, (uint8_t []){0x3B, 0x00}, 2, 0},
// ...
// };
ESP_LOGI(TAG, "MIPI DSI PHY Powered on");
esp_ldo_channel_config_t ldo_mipi_phy_config = {
.chan_id = EXAMPLE_MIPI_DSI_PHY_PWR_LDO_CHAN,
.voltage_mv = EXAMPLE_MIPI_DSI_PHY_PWR_LDO_VOLTAGE_MV,
};
ESP_ERROR_CHECK(esp_ldo_acquire_channel(&ldo_mipi_phy_config, &ldo_mipi_phy));
ESP_LOGI(TAG, "Initialize MIPI DSI bus");
esp_lcd_dsi_bus_config_t bus_config = ST77922_PANEL_BUS_DSI_1CH_CONFIG();
ESP_ERROR_CHECK(esp_lcd_new_dsi_bus(&bus_config, &mipi_dsi_bus));
ESP_LOGI(TAG, "Install panel IO");
esp_lcd_dbi_io_config_t dbi_config = ST77922_PANEL_IO_DBI_CONFIG();
ESP_ERROR_CHECK(esp_lcd_new_panel_io_dbi(mipi_dsi_bus, &dbi_config, &mipi_dbi_io));
ESP_LOGI(TAG, "Install LCD driver of st77922");
esp_lcd_panel_handle_t panel_handle = NULL;
esp_lcd_dpi_panel_config_t dpi_config = ST77922_480_360_PANEL_60HZ_DPI_CONFIG(EXAMPLE_MIPI_DPI_PX_FORMAT);
st77922_vendor_config_t vendor_config = {
// .init_cmds = lcd_init_cmds, // Uncomment these line if use custom initialization commands
// .init_cmds_size = sizeof(lcd_init_cmds) / sizeof(st77922_lcd_init_cmd_t),
.flags.use_mipi_interface = 1,
.mipi_config = {
.dsi_bus = mipi_dsi_bus,
.dpi_config = &dpi_config,
},
};
const esp_lcd_panel_dev_config_t panel_config = {
.reset_gpio_num = EXAMPLE_PIN_NUM_LCD_RST,
.rgb_ele_order = LCD_RGB_ELEMENT_ORDER_RGB,
.bits_per_pixel = EXAMPLE_LCD_BIT_PER_PIXEL,
.vendor_config = &vendor_config,
};
ESP_ERROR_CHECK(esp_lcd_new_panel_st77922(mipi_dbi_io, &panel_config, &panel_handle));
ESP_ERROR_CHECK(esp_lcd_panel_reset(panel_handle));
ESP_ERROR_CHECK(esp_lcd_panel_init(panel_handle));
ESP_ERROR_CHECK(esp_lcd_panel_disp_on_off(panel_handle, true));
```
Links
- Homepage
-
Repository
f265f15afc55d64554d5aa6972326c5395944a79
- Issues
Supports all targets
License: Apache-2.0
To add this component to your project, run:
or
download archive
idf.py add-dependency "espressif/esp_lcd_st77922^1.0.2"
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