void M5EPD::begin(bool touchEnable, bool SDEnable, bool SerialEnable,
                  bool BatteryADCEnable, bool I2CEnable) {
    if (_isInited) {
        return;
    }
    _isInited = true;
 
    pinMode(M5EPD_MAIN_PWR_PIN, OUTPUT);
    enableMainPower();
 
    if (SerialEnable == true) {
        Serial.begin(115200);
        Serial.flush();
        delay(50);
        Serial.print("M5EPD initializing...");
    }
 
    pinMode(M5EPD_EXT_PWR_EN_PIN, OUTPUT);
    pinMode(M5EPD_EPD_PWR_EN_PIN, OUTPUT);
    pinMode(M5EPD_KEY_RIGHT_PIN, INPUT);
    pinMode(M5EPD_KEY_PUSH_PIN, INPUT);
    pinMode(M5EPD_KEY_LEFT_PIN, INPUT);
    delay(100);
 
    enableEXTPower();
    enableEPDPower();
    delay(1000);
 
    EPD.begin(M5EPD_SCK_PIN, M5EPD_MOSI_PIN, M5EPD_MISO_PIN, M5EPD_CS_PIN,
              M5EPD_BUSY_PIN);
 
    if (SDEnable == true) {
        SPI.begin(14, 13, 12, 4);
        SD.begin(4, SPI, 20000000);
    }
 
    if (touchEnable == true) {
        if (TP.begin(21, 22, 36) != ESP_OK) {
            log_e("Touch pad initialization failed.");
        }
    } else if (I2CEnable == true) {
        Wire.begin(21, 22, (uint32_t)400000U);
    }
 
    if (BatteryADCEnable == true) {
        BatteryADCBegin();
    }
 
    if (SerialEnable == true) {
        Serial.println("OK");
    }
}

#include <M5EPD.h>
 
void setup() {
  M5.begin(true,true,true,true,true);
}

#include <M5EPD.h>
void setup() {
  M5.begin(false,false,true,false,false);
}
 
void loop() {
  M5.update();
  if( M5.BtnL.wasPressed()) {
    Serial.println("Left button pressed");
  }
  delay(100);
}

#include <M5EPD.h>
 
void setup() {
  M5.begin();
  Serial.println("Please pressed Button L.");
}
 
void loop() {
  M5.update();
  Serial.printf("The last change at %d ms /n",M5.BtnL.lastChange());    //Print the time of the last state change of key L. 打印按键L最后一次状态变化的时间
}

#include <M5EPD.h>
 
void setup() {
    M5.begin();
    Serial.println("Please pressed Button L.");
}
 
void loop() {
    M5.update(); // Need to add M5.update() to read the state of the button
     //需添加M5.update()才能读取到按键的状态.
    if (M5.BtnL.isPressed()) {  //If the key is pressed. 如果按键按下
        Serial.println("Button is Pressed.");
    } else {
        Serial.println("Button is Released.");
    }
    delay(20);
}

#include <M5EPD.h>
 
void setup() {
    M5.begin();
    Serial.println("Please pressed Button L.");
}
 
void loop() {
    M5.update();
    if (M5.BtnL.pressedFor(
            2000)) {  // If the button is pushed up for more than 2 seconds.
                      //如果按键被推上超过2秒.
        Serial.println("Button L was pressed for more than 2 seconds.");
        delay(1000);
    }
}

#include <M5EPD.h>
 
void setup() {
  M5.begin();
  Serial.println("Please push on Button L.");
}
 
void loop() {
  M5.update();
  if (M5.BtnL.wasPressed()) {    //If the button is pushed up. 如果按键被推上
    Serial.println("Button is pressed.");
  }
  delay(20);
}

#include <M5EPD.h>
 
void setup() { M5.begin(); }
 
void loop() {
    M5.update();  // Need to add M5.update() to read the state of the button
                  //需添加M5.update()才能读取到按键的状态.
    if (M5.BtnL.isReleased()) {  //If the key is released. 如果按键释放.
        Serial.println("Button is released.");
    } else {
        Serial.println("Button is Pressed .");
    }
    delay(20);
}

#include <M5EPD.h>
 
void setup() { M5.begin(); }
 
void loop() {
    M5.update();  // Need to add M5.update() to read the state of the button
                  //需添加M5.update()才能读取到按键的状态.
    if (M5.BtnL.isReleased()) {  //If the key is released. 如果按键释放
        Serial.println("Button is released.");
    } else {
        Serial.println("Button is pressed.");
    }
    delay(20);
}

#include <M5EPD.h>
 
void setup() {
    M5.begin();
    Serial.println("Please pressed Button L.");
}
 
void loop() {
    M5.update();
    if (M5.BtnL.wasReleased()) {  //If the key is released. 如果按键释放
        Serial.println("Button is Released.");
    }
    delay(20);
}

#include <M5EPD.h>
 
void setup() {
    M5.begin();
    Serial.println("Please pressed Button L.");
}
 
void loop() {
    M5.update();
    if (M5.BtnL.wasReleasefor(
            3000)) {  // If button A is pressed for 3s and then released
                      //如果按键A按下3s之后释放.
        Serial.println("OK");
    }
}

#include <M5EPD.h>
 
void setup() {
    M5.begin();
    M5.enableEXTPower();  //enable external power. 启用拓展端口电源
    Serial.println("Expansion port power is on");
}
 
void loop() {}

#include <M5EPD.h>
 
void setup() {
    M5.begin();
    M5.disableEXTPower();  //disable external power. 关闭拓展端口电源
    Serial.println("Expansion port power is off");
}
 
void loop() {}

#include <M5EPD.h>
 
void setup() {
    M5.begin();
    M5.enableEPDPower();  //enable EPD power. 启用墨水屏电源
    Serial.println("Ink screen power is activated");
}
 
void loop() {}

#include <M5EPD.h>
 
void setup() {
    M5.begin();
    M5.disableEPDPower();  //disable EPD power. 关闭墨水屏电源
    Serial.println("Ink screen power off");
}
 
void loop() {}

#include <M5EPD.h>
 
void setup() {
    M5.begin();
    M5.enableMainPower();  //Start main power. 启动主电源
    Serial.println("Main power is on");
}
 
void loop() {}

#include <M5EPD.h>
 
void setup() {
    M5.begin();
    M5.disableMainPower();  //Turn off the main power. 关闭主电源
    Serial.println("Main power is off");
}
 
void loop() {}

#include <M5EPD.h>
 
void setup() {
    M5.begin();
    M5.BatteryADCBegin();  // Initialize battery ADC detection.
                           // 初始化电池ADC检测
}
 
void loop() {}

#include <M5EPD.h>
 
void setup() {
    M5.begin();
    Serial.printf("ADC RAW:%d",
                  M5.getBatteryRaw());  // Read battery voltage native ADC values
                                        // 读取电池电压原生ADC值
}
 
void loop() {}

#include <M5EPD.h>
 
void setup() {
    M5.begin();
    Serial.printf("Battery Voltage:%d",
                  M5.getBatteryVoltage());  // Read battery voltage
                                            // 读取电池电压
}
 
void loop() {}

#include <M5EPD.h>
 
M5EPD_Canvas canvas(&M5.EPD);
 
void setup(){
  M5.begin();
  M5.EPD.SetRotation(90);
  M5.TP.SetRotation(90);
  M5.EPD.Clear(true);
  M5.RTC.begin();
  canvas.createCanvas(540, 960);
  canvas.setTextSize(3);
  canvas.drawString("Press PWR Btn for sleep!", 45, 350);
  canvas.drawString("after 5 sec wakeup!", 70, 450);
  canvas.pushCanvas(0,0,UPDATE_MODE_DU4);
}
 
void loop(){
  if(M5.BtnP.wasPressed()){
    canvas.drawString("I'm going to sleep.zzzZZZ~", 45, 550);
    canvas.pushCanvas(0,0,UPDATE_MODE_DU4);
    delay(1000);
    M5.shutdown(5);
  }
  M5.update();
  delay(100);
}