Implementation of the GT1151 touch controller with esp_lcd_touch component.
Touch controller | Communication interface | Component name | Link to datasheet |
---|---|---|---|
GT1151 | I2C | esp_lcd_touch_gt1151 | datasheet |
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.
idf.py add-dependency esp_lcd_touch_gt1151==1.0.0
Alternatively, you can create idf_component.yml
. More is in Espressif's documentation.
Initialization of the touch component.
esp_lcd_panel_io_i2c_config_t io_config = ESP_LCD_TOUCH_IO_I2C_GT1151_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_gt1151(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_strength, &touch_cnt, 1);
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idf.py add-dependency "espressif/esp_lcd_touch_gt1151^1.0.5~1"
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