Arduino GT911 touch screen driver
Basic usage
#include <GT911.h>
GT911 touch = GT911();
void handleTouch(int8_t count, GTPoint *points) {
for (int i = 0; i < count; i++)
Serial.printf("Point %d at %d, %d size: %d track ID: %d\n", i, points[i].x, points[i].y, points[i].size, points[i].trackId);
}
void touchStart() {
touch.begin(INT_PIN, RST_PIN, GT911_I2C_ADDR_BA);
Wire.beginTransmission(touch.getI2CAddress());
touch.readInfo(); // you can get product id and other information with:
Serial.println(getInfo().productId);
touch.readConfig();
// you can change configs with:
touch.getConfig().xResolution = 128;
// and save it with:
touch.writeConfig();
}
void begin() {
Wire.setClock(400000);
Wire.begin();
delay(300);
touch.setHandler(handleTouch);
touchStart();
}
void loop() {
touch.loop();
}Prototype of arduino-based library for GT911 touchscreen driver chip (tested on Teensy 4.1, 320*480 resolution).