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| idf_component_register(SRCS "esp_lcd_st7796.c" | ||
| INCLUDE_DIRS "include" | ||
| REQUIRES "esp_lcd" | ||
| PRIV_REQUIRES "driver") |
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| # ESP LCD ST7796 | ||
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| [](https://components.espressif.com/components/espressif/esp_lcd_st7796) | ||
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| Implementation of the ST7796 LCD controller with esp_lcd component. | ||
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| | 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) | | ||
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| ## Add to project | ||
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| 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. | ||
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| ```bash | ||
| compote manifest add-dependency espressif/esp_lcd_st7796==1.0.0 | ||
| ``` | ||
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| 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). | ||
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| ## Initialization Code (i80 interface) | ||
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| ```c | ||
| size_t draw_buffer_pixels = EXAMPLE_LCD_H_RES * 100; | ||
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| 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)); | ||
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| 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)); | ||
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| 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); | ||
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| ESP_ERROR_CHECK(esp_lcd_panel_disp_on_off(panel_handle, true)); | ||
| ``` |
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