M5Stack Core2 vibration test sketch.

vibe_test.ino

#include <M5Core2.h>

void vibration(int t) {
  M5.Axp.SetLDOEnable(3, true);
  delay(t);
  M5.Axp.SetLDOEnable(3, false);
}

void setup() {
  M5.begin(true, true, true, true);
  M5.Lcd.fillScreen(WHITE);
  M5.Lcd.setTextColor(BLACK);
  M5.Lcd.setTextSize(3);
  M5.Lcd.setRotation(2);
  M5.Lcd.setCursor(150, 42);
  M5.Lcd.printf("500ms");
  M5.Lcd.setCursor(150, 150);
  M5.Lcd.printf("200ms");
  M5.Lcd.setCursor(60, 255);
  M5.Lcd.printf("while push");
  delay(100);
}

bool button = false;

void loop() {
  TouchPoint_t pos = M5.Touch.getPressPoint();
  if (pos.x >= 0) {
    if (pos.y > 240 && pos.x < 109) {
      M5.Axp.SetLDOEnable(3, true);
      Serial.println("button 1");
    } else if (pos.y > 240 && pos.x >= 110 && pos.x < 219) {
      if (!button) vibration(200);
      button = true;
      Serial.println("button 2");
    } else if (pos.y > 240 && pos.x >= 220) {
      if (!button) vibration(500);
      button = true;
      Serial.println("button 3");
    }
  } else {
    M5.Axp.SetLDOEnable(3, false);
    button = false;
  }
}