Post by 邱老师 on Feb 11, 2021 16:15:50 GMT
int buzzer=9;//信号源接D9口
unsigned char i,j;
void setup() {
pinMode(buzzer,OUTPUT);
}
void loop() {
while(1)
{
for(i=0;i<80;i++)
{
digitalWrite(buzzer,HIGH);
delay(1);
digitalWrite(buzzer,LOW);
delay(1);
}
for(j=0;j<100;j++)
{
digitalWrite(buzzer,HIGH);
delay(2);
digitalWrite(buzzer,LOW);
delay(2);
}
}
}