p1口控制音频电路发声.c

北航新c51单片机实验源代码

#include <reg51.h>
sbit Speaker = P1^0;
void Delay() {
  unsigned char i;
  for (i=0; i<50; i++);
}
void main() {
  while (1) {
    Speaker = 0;
    Delay();
    Speaker = 1;
    Delay();
  }
}