M5Paper: Show touch position.

main.cpp

#include <M5EPD.h>

void setup() {
  M5.begin();
}

void loop() {
  if (!M5.TP.avaliable()) {
    return;
  }
  M5.TP.update();
  if (!M5.TP.isFingerUp()) {
    for (int n = 0; n < M5.TP.getFingerNum(); ++n) {
      const tp_finger_t finger = M5.TP.readFinger(n);
      Serial.printf("[%d] (%3d,%3d) ", n, finger.x, finger.y);
    }
    Serial.println();
  }
}