gt9895_get_point.ino

Go to the documentation of this file.

 
#include <TouchDrv.hpp>
 
#ifndef TOUCH_SDA
#define TOUCH_SDA  2
#endif
 
#ifndef TOUCH_SCL
#define TOUCH_SCL  3
#endif
 
#ifndef TOUCH_IRQ
#define TOUCH_IRQ  1
#endif
 
#ifndef TOUCH_RST
#define TOUCH_RST  10
#endif
 
TouchDrvGT9895 touch;
 
void setup()
{
    Serial.begin(115200);
 
    while (!Serial);
 
    delay(3000);
 
    // Set touch interrupt and reset Pin
    touch.setPins(TOUCH_RST, TOUCH_IRQ);
 
    if (!touch.begin(Wire, GT9895_SLAVE_ADDRESS_L, TOUCH_SDA, TOUCH_SCL )) {
        while (1) {
            Serial.println("Failed to find GT9895 - check your wiring!");
            delay(1000);
        }
    }
 
    Serial.print("Chip ID : 0x"); Serial.println(touch.getChipID(), HEX);
 
    // Sleep touch
    // touch.sleep();
 
    // int i = 10;
    // while (i--) {
    //     Serial.print("Wake up after ");
    //     Serial.print(i);
    //     Serial.println(" seconds");
    //     delay(1000);
    // }
 
    // Wakeup touch
    // touch.wakeup();
 
    // Set touch max xy
    // touch.setMaxCoordinates(240, 296);
 
    // Set swap xy
    // touch.setSwapXY(true);
 
    // Set mirror xy
    // touch.setMirrorXY(true, true);
 
}
 
void loop()
{
    /*
    * Methods to increase the refresh rate:
    * 1. Set the touch interrupt to a low level when touching, rather than a falling edge.
    *    Some are falling edge triggered, with a trigger period of about 10ms, depending on the firmware
    *    This requires the touch screen manufacturer to provide a firmware update, which is currently unavailable.
    * 2. Use polling registers instead of interrupts, but this will consume CPU
    */
    TouchPoints touch_points = touch.getTouchPoints();
    if (touch_points.hasPoints()) {
        for (int i = 0; i < touch_points.getPointCount(); ++i) {
            const TouchPoint &point = touch_points.getPoint(i);
            Serial.print("X[");
            Serial.print(i);
            Serial.print("]:");
            Serial.print(point.x);
            Serial.print(" ");
            Serial.print(" Y[");
            Serial.print(i);
            Serial.print("]:");
            Serial.print(point.y);
            Serial.print(" ");
        }
        Serial.println();
    }
}