arduino_st_fengmian_1.inc

//Arduion 基础入门套件教程 第7章 蜂鸣器实验
int buzzer = 7;

void setup()
{
  pinMode(buzzer,OUTPUT);
}

void loop()
{
  unsigned char i,j;
  while(1)
  {
    for(i=0;i<80;i++)
    {
      digitalWrite(buzzer,HIGH);
      delay(1);
      digitalWrite(buzzer,LOW);
      delay(1);
    }
    
    for(i = 0; i < 100;i++)
    {
      digitalWrite(buzzer,HIGH);
      delay(2);
      digitalWrite(buzzer,LOW);
      delay(2);
    }
  }
}