p1口作输入和输出.c

北航新c51单片机实验源代码

#include <reg51.h>
sbit KeyLeft  = P1^0;
sbit KeyRight = P1^1;
sbit LEDLeft  = P1^2;
sbit LEDRight = P1^3;

void main() {
  while (1) {
    LEDLeft  = KeyLeft;
    LEDRight = KeyRight;
  }
}