Arduino入门教程—测试实验 板载LED实验

keliyuan

利用板载3个LED做个流水灯

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volatile int item;

void setup(){
  item = 0;
  pinMode(0, OUTPUT);
  pinMode(1, OUTPUT);
  pinMode(13, OUTPUT);
}

void loop(){
  for (int item = 50; item <= 400; item = item + (25)) {
    digitalWrite(0,HIGH);
    digitalWrite(1,HIGH);
    digitalWrite(13,HIGH);
    delay(item);
    digitalWrite(0,HIGH);
    digitalWrite(1,LOW);
    digitalWrite(13,LOW);
    delay(item);
    digitalWrite(0,LOW);
    digitalWrite(1,HIGH);
    digitalWrite(13,LOW);
    delay(item);
  }
  for (int item = 400; item >= 50; item = item + (-25)) {
    digitalWrite(0,HIGH);
    digitalWrite(1,HIGH);
    digitalWrite(13,HIGH);
    delay(item);
    digitalWrite(0,HIGH);
    digitalWrite(1,LOW);
    digitalWrite(13,LOW);
    delay(item);
    digitalWrite(0,LOW);
    digitalWrite(1,HIGH);
    digitalWrite(13,LOW);
    delay(item);
  }
  for (int item = 50; item <= 400; item = item + (25)) {
    digitalWrite(0,LOW);
    digitalWrite(1,HIGH);
    digitalWrite(13,LOW);
    delay(item);
    digitalWrite(0,HIGH);
    digitalWrite(1,LOW);
    digitalWrite(13,LOW);
    delay(item);
    digitalWrite(0,HIGH);
    digitalWrite(1,HIGH);
    digitalWrite(13,HIGH);
    delay(item);
  }
  for (int item = 400; item >= 50; item = item + (-25)) {
    digitalWrite(0,LOW);
    digitalWrite(1,HIGH);
    digitalWrite(13,LOW);
    delay(item);
    digitalWrite(0,HIGH);
    digitalWrite(1,LOW);
    digitalWrite(13,LOW);
    delay(item);
    digitalWrite(0,HIGH);
    digitalWrite(1,HIGH);
    digitalWrite(13,HIGH);
    delay(item);
  }

}