1、#include<reg52.h>#define uchar unsigned char#define uint unsigned intsbit s1=P1^4;sbit s2=P1^5;sbit s3=P1^6;sbit s4=P1^7;void delay(uint z){ uint x,y; for(x=z;x>0;x--) for(y=110;y>0;y--);}void keycan(){ uint i; if(s1==0) { delay(30); if(s1==0) { i++; switch(i) { case 1: P0=0x7f; break; case 2: P0=0xbf; break; case 3: P0=0xdf; break; case 4: P0=0xef; break; case 5: P0=0xf7; break; case 6: P0=0xfb; break; case 7: P0=0xfd; break; case 8: P0=0xfe; break; default:i=0; } while(!s1); } } if(s2==0) { delay(30); if(s2==0) { i++; switch(i) { case 1: P0=0xfd; break; case 2: P0=0xfb; break; case 3: P0=0xf7; break; case 4: P0=0xef; break; case 5: P0=0xdf; break; case 6: P0=0xbf; break; case 7: P0=0x7f; break; case 8: P0=0xfe; break; default:i=0; } while(!s2); } }}void keycan1(){ uint i; if(s3==0) { delay(30); if(s3==0) { i++; switch(i) { case 1: P2=0x7f; break; case 2: P2=0xbf; break; case 3: P2=0xdf; break; case 4: P2=0xef; break; case 5: P2=0xf7; break; case 6: P2=0xfb; break; case 7: P2=0xfd; break; case 8: P2=0xfe; break; default:i=0; } while(!s3); } } if(s4==0) { delay(30); if(s4==0) { i++; switch(i) { case 1: P2=0xfd; break; case 2: P2=0xfb; break; case 3: P2=0xf7; break; case 4: P2=0xef; break; case 5: P2=0xdf; break; case 6: P2=0xbf; break; case 7: P2=0x7f; break; case 8: P2=0xfe; break; default:i=0; } while(!s4); } }}void main(){ P0=0xfe; P2=0xfe; while(1) { keycan(); keycan1(); }}
