espressif/esp_lcd_st7796

uploaded 5 months ago

# ESP LCD ST7796 [](https://components.espressif.com/components/espressif/esp_lcd_st7796) Implementation of the ST7796 LCD controller with esp_lcd component. | LCD controller | Communication interface | Component name | Link to datasheet | | :------------: | :---------------------: | :------------: | :---------------: | | ST7796 | SPI/I80 | esp_lcd_st7796 | [Specification](https://www.displayfuture.com/Display/datasheet/controller/ST7796s.pdf) | ## 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-dependency`, e.g. ```bash compote manifest add-dependency espressif/esp_lcd_st7796==1.0.0 ``` 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 (i80 interface) ```c size_t draw_buffer_pixels = EXAMPLE_LCD_H_RES * 100; ESP_LOGI(TAG, "Initialize Intel 8080 bus"); esp_lcd_i80_bus_handle_t i80_bus = NULL; esp_lcd_i80_bus_config_t bus_config = { .clk_src = LCD_CLK_SRC_DEFAULT, .dc_gpio_num = EXAMPLE_PIN_NUM_DC, .wr_gpio_num = EXAMPLE_PIN_NUM_PCLK, .data_gpio_nums = { EXAMPLE_PIN_NUM_DATA0, EXAMPLE_PIN_NUM_DATA1, EXAMPLE_PIN_NUM_DATA2, EXAMPLE_PIN_NUM_DATA3, EXAMPLE_PIN_NUM_DATA4, EXAMPLE_PIN_NUM_DATA5, EXAMPLE_PIN_NUM_DATA6, EXAMPLE_PIN_NUM_DATA7, }, .bus_width = 8, .max_transfer_bytes = draw_buffer_pixels * sizeof(uint16_t), }; ESP_ERROR_CHECK(esp_lcd_new_i80_bus(&bus_config, &i80_bus)); esp_lcd_panel_io_handle_t io_handle = NULL; esp_lcd_panel_io_i80_config_t io_config = { .cs_gpio_num = EXAMPLE_PIN_NUM_CS, .pclk_hz = EXAMPLE_LCD_PIXEL_CLOCK_HZ, .trans_queue_depth = 10, .dc_levels = { .dc_idle_level = 0, .dc_cmd_level = 0, .dc_dummy_level = 0, .dc_data_level = 1, }, .lcd_cmd_bits = 8, .lcd_param_bits = 8, }; ESP_ERROR_CHECK(esp_lcd_new_panel_io_i80(i80_bus, &io_config, &io_handle)); ESP_LOGI(TAG, "Install st7796 LCD panel driver"); esp_lcd_panel_handle_t panel_handle = NULL; esp_lcd_panel_dev_config_t panel_config = { .reset_gpio_num = EXAMPLE_PIN_NUM_RST, .rgb_endian = LCD_RGB_ENDIAN_BGR, .bits_per_pixel = 16, }; ESP_ERROR_CHECK(esp_lcd_new_panel_st7796(io_handle, &panel_config, &panel_handle)); esp_lcd_panel_reset(panel_handle); esp_lcd_panel_init(panel_handle); esp_lcd_panel_mirror(panel_handle, true, true); esp_lcd_panel_swap_xy(panel_handle, true); ESP_ERROR_CHECK(esp_lcd_panel_disp_on_off(panel_handle, true)); ```