                                               /* | PAG_256  |        8             | */
   M5.Lcd.setTextFont(4);  //Set font to 4 point font.  设置字体为4号字体
   M5.Lcd.setCursor(52, 210);  //Set the cursor at (52,210).  将光标设置在(52, 210)
-  M5.Lcd.printf("2A                         SAVE");
+  M5.Lcd.printf("2A                            SAVE");
 }
 
 void loop(void) {


  if (M5.BtnC.wasPressed()) {
    bool success = ammeter.saveCalibration2EEPROM(now_gain, hope, adc_raw);
    M5.Lcd.setCursor(230, 210);
    if (success) {
      M5.Lcd.setTextColor(GREEN, BLACK);
    } else {

  M5.begin(); //Init M5Stack.  初始化M5Stack
  M5.Power.begin(); //Init power  初始化电源模块

  Wire.begin();

  ammeter.setMode(SINGLESHOT);                /* | PAG      | Max Input Voltage(V) | */
  ammeter.setRate(RATE_8);                    /* | PAG_6144 |        128           | */
  ammeter.setGain(PAG_512);                   /* | PAG_4096 |        64            | */
