espressif/esp_lcd_touch_gt911

uploaded 1 year ago

# ESP LCD Touch GT911 Controller Implementation of the GT911 touch controller with esp_lcd_touch component. | Touch controller | Communication interface | Component name | Link to datasheet | | :--------------: | :---------------------: | :------------: | :---------------: | | GT911 | I2C | esp_lcd_touch_gt911 | [WIKI](https://www.waveshare.com/wiki/7inch-Capacitive-Touch-LCD-C_Datasheets) | ## 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 esp_lcd_touch_gt911==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). ## Example use Initialization of the touch component. ``` esp_lcd_panel_io_i2c_config_t io_config = ESP_LCD_TOUCH_IO_I2C_GT911_CONFIG(); esp_lcd_touch_config_t tp_cfg = { .x_max = CONFIG_LCD_HRES, .y_max = CONFIG_LCD_VRES, .rst_gpio_num = -1, .int_gpio_num = -1, .levels = { .reset = 0, .interrupt = 0, }, .flags = { .swap_xy = 0, .mirror_x = 0, .mirror_y = 0, }, }; esp_lcd_touch_handle_t tp; esp_lcd_touch_new_i2c_gt911(io_handle, &tp_cfg, &tp); ``` Read data from the touch controller and store it in RAM memory. It should be called regularly in poll. ``` esp_lcd_touch_read_data(tp); ``` Get one X and Y coordinates with strength of touch. ``` uint16_t touch_x[1]; uint16_t touch_y[1]; uint16_t touch_strength[1]; uint8_t touch_cnt = 0; bool touchpad_pressed = esp_lcd_touch_get_coordinates(tp, touch_x, touch_y, touch_btn, &touch_cnt, 1); ```