// sketch_05_05_square
int pin = 10;
int state = 0;
void setup()
{
pinMode(pin, OUTPUT);
}
void loop()
{
digitalWrite(pin, state);
state = ! state; //此时方波频率约为111.1Khz
}
实验二 用循环语句延长周期
// sketch_05_05_square
int pin = 10;
int state = 0;
int i=0;
int k=0;
void setup()
{
pinMode(pin, OUTPUT);
}https://www.geek-workshop.com/#
void loop()
{
digitalWrite(pin, state);
state = ! state;
// This double circulation will produce ms delay
for(i=1;i<=2000;i++){
for(k=1;k<=1000;k++);
} //此时方波频率约为0.5Khz https://www.geek-workshop.com/#