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

Add to project

Packages from this repository are uploaded to Espressif's component service. You can add them to your project via idf.py add-dependancy, e.g.

Plaintext

    idf.py add-dependency esp_lcd_touch_gt911==1.1.1

Alternatively, you can create idf_component.yml. More is in Espressif's documentation.

Example use

Initialization of the touch component.

Plaintext

    esp_lcd_panel_io_i2c_config_t io_config = ESP_LCD_TOUCH_IO_I2C_GT911_CONFIG();

    esp_lcd_touch_io_gt911_config_t tp_gt911_config = {
        .dev_addr = io_config.dev_addr,
    };

    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,
        },
        .driver_data = &tp_gt911_config,
    };

    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.

Plaintext

    esp_lcd_touch_read_data(tp);

Get attributes of a single touch point.

Plaintext

    esp_lcd_touch_point_data_t touch_point_data[1];
    uint8_t touch_cnt = 0;

    ESP_ERROR_CHECK(esp_lcd_touch_get_data(tp, touch_point_data, &touch_cnt, 1));

espressif/esp_lcd_touch_gt911

readme

ESP LCD Touch GT911 Controller

Add to project

Example use

Links

Supports all targets

License: Apache-2.0

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