#include <util/atomic.h> // 用于 demo 4: ATOMIC_BLOCK macro.

#define LEDPIN 13
#define INTERRUPTPIN 2
volatile byte ledStatus = HIGH; //此变量被中断使用，定义为挥发性变量
int x = 0;

void blink() {
  ledStatus = HIGH;
}

#define MOTOR1_ENABLE 22
#define MOTOR1_STEP 1
#define MOTOR1_DIR 0

#define MOTOR2_ENABLE 5
#define MOTOR2_STEP 6
#define MOTOR2_DIR 7




/*----------------------------SETUP FUNCTION--------------------------*/
void setup()
{
  pinMode(LEDPIN, OUTPUT);
  pinMode(INTERRUPTPIN, INPUT_PULLUP);
  digitalWrite(LEDPIN,LOW);
  
  // demo 1 : 基本中断使用方法
  attachInterrupt(digitalPinToInterrupt(INTERRUPTPIN),blink,FALLING);
  // attachInterrupt(digitalPinToInterrupt(INTERRUPTPIN),blink,CHANGE);

  pinMode(MOTOR1_ENABLE,OUTPUT);     // ENABLE AS OUTPUT
  pinMode(MOTOR1_DIR,OUTPUT);    // DIRECTION AS OUTPUT
  pinMode(MOTOR1_STEP,OUTPUT);   // STEP AS OUTPUT
  digitalWrite(MOTOR1_ENABLE,LOW);   // SET ENABLE TO LOW
}
/*----------------------------LOOP FUNCTION--------------------------*/
void loop()
{
  digitalWrite(LEDPIN,ledStatus);
  if(ledStatus)
  {
    x++;
    digitalWrite(MOTOR1_DIR,HIGH);        // SET DIRECTION LOW FOR FORWARD ROTATION
    if(x%2)
    {
      digitalWrite(MOTOR1_STEP,HIGH);    // STEP HIGH
      delay(1);                   // WAIT
    }
    else
    {
      digitalWrite(MOTOR1_STEP,LOW);     // STEP LOW
      delay(1);                   // WAIT
    }
    ledStatus = LOW;
  }
  
}