K1-K4 控制数码管加减演示

#include <reg52.h> #include <intrins.h> #define uchar unsigned char #define uint unsigned int uchar code DSY_CODE[]= { 0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90,0xff }; uchar Num_Buffer[] = {0,0,0}; uchar Key_Code,Key_Counts=0; void DelayMS(uint x) { uchar t; while(x--) { for(t=0;t<120;t++); } } void Show_Counts_ON_DSY() { uchar i,j=0x01; Num_Buffer[2]=Key_Counts/100; Num_Buffer[1]=Key_Counts/10%10; Num_Buffer[0]=Key_Counts%10; for(i=0;i<3;i++) { j = _cror_(j,1); P2 = j; P0 = DSY_CODE[Num_Buffer[i]]; DelayMS(1); } } void main() { uchar i; P0 = 0xff; P1 = 0xff; P2 = 0x00; Key_Code = 0xff; while(1) { Show_Counts_ON_DSY(); P1 = 0xff; Key_Code = P1; if(Key_Code != 0xff) { for(i=0;i<30;i++) { Show_Counts_ON_DSY(); } } switch(Key_Code) { case 0xfe:if(Key_Counts<255) Key_Counts++;break; case 0xfd:if(Key_Counts>0) Key_Counts--;break; case 0xfb:Key_Counts=0; } Key_Code = 0xff; } }