通过中断的方式使用按键控制LED灯

#define key 0#define led 16
volatile int state =LOW;

void setup()
{
pinMode(led,OUTPUT);
pinMode(key,INPUT);
digitalWrite(led,LOW);
attachInterrupt(key,stateChange,CHANGE);

}
void stateChange()
{
state=!state;
digitalWrite(led,state);
}

void loop()
{



}