K1-K4 控制LED移位.zip

#include <reg52.h> #include <intrins.h> #define uchar unsigned char #define uint unsigned int void DelayMS(uint x) { uchar i; while(x--) { for(i=200;i>0;i--); } } void Move_LED() { if((P1 &= 0x10)==0) P0 = _cror_(P0,1); else if((P1 &= 0x20)==0) P0 = _crol_(P0,1); else if((P1 &= 0x40)==0) P2 = _cror_(P2,1); else if((P1 &= 0x80)==0) P2 = _crol_(P2,1); } void main() { uchar Recent_Key=0xff; P0=0xfe; P1=0xfe; P2=0xfe; while(1) { if(Recent_Key != P1) { Recent_Key=P1; Move_LED(); DelayMS(10); } } }