const int dirPin = 2;  //選轉方向接腳
const int stepPin = 3; //步進馬達接腳
 
//步進馬達每次選轉200
const int STEPS_PER_REV = 200;
 
void setup() {
  
 //使用arduino 控制 A4988 的接腳輸出
  pinMode(stepPin,OUTPUT); 
  pinMode(dirPin,OUTPUT);
}
void loop() {
  
  //設定步進馬達順時針選轉
  digitalWrite(dirPin,LOW); 
  
  //讓步進馬達慢速選轉
  for(int x = 0; x < STEPS_PER_REV; x++) {
    digitalWrite(stepPin,HIGH); 
    delayMicroseconds(2000); 
    digitalWrite(stepPin,LOW); 
    delayMicroseconds(2000); 
  }
  
  //延遲一秒
  delay(1000); 
  
  //設定步進馬達逆時針選轉
  digitalWrite(dirPin,HIGH);
  
  //讓步進馬達快速選轉
  for(int x = 0; x < (STEPS_PER_REV * 2); x++) {
    digitalWrite(stepPin,HIGH);
    delayMicroseconds(1000);
    digitalWrite(stepPin,LOW);
    delayMicroseconds(1000);
  }
  
  //延遲一秒
  delay(1000);
}