微控制器:K1 K2 K3 K4應用:K1迴圈左移 K2停止 K3 左移 K4 二進位制減法 流水燈控制
阿新 • • 發佈:2021-08-08
#include <reg52.h> #include<intrins.h> sbit key1=P3^2; sbit key2=P3^3; sbit key3=P3^4; sbit key4=P3^5; typedef unsigned int uint; typedef unsigned char uchar; void delay(uint a) { uchar i; while(a--)for(i=0;i<110;i++); } main() { uchar led=0x7f; uchar flag=0; while (1) {if(key1==0) { delay(5); if(key1==0) { while(key1==0); flag=1; //led=0xfe; } } if(key2==0) { delay(5); if(key2==0) { while(key2==0); flag=2; } }if(key3==0) { delay(5); if(key3==0) { while(key3==0); flag=3; } } if(key4==0) { delay(5); if(key4==0) { while(key4==0); flag=4; } }switch(flag) { case 1:P1=led;led=_crol_(led,1);delay(1700);break; case 2:P1=0xff;break; case 3:P1=P1<<1;delay(1700); if (P1==0X00) P1=0XFF; break; //case 4:P1=~P1;delay(1000);break; case 4:P1--;delay(200);break; default:continue; } } }