单片机期末总结与复习

#include<reg51.h> #define uchar unsigned char #define uint unsigned int Tab[]={0xC0,0xF9,0xA4,0xB0,0x99,0x92,0x82,0xF8,0x80,0x90,0x88,0x83,0xC6,0xA1,0x86,0x8E}; led[]={0xfe,0xfd,0xfb,0xf7,0xef,0xdf,0xbf,0x7f}; Tab1[]={0x8e,0x8e,0x8e}; sbit K19=P3^7; sbit K18=P3^6; sbit K17=P3^5; sbit K16=P3^4; uchar floag1=0; int num=0,key=0; void delay1ms(uint i) { uchar j; while(i--) for(j=0;j<115;j++); } void panduan_K16() { if(K16==0) { floag1++; while(K16==0); } if(floag1>1) floag1=0; } void panduan_K17() { if(K17==0) { num++; while(K17==0); } if(num==1000) num=0; } void panduan_K18() { if(K18==0) { num--; while(K18==0); } if(num==-1) num=999; } void keypro() { unsigned char i,j,temp; i=j=16; P1=0xff; temp=P1; if(temp!=0xf0) { delay1ms(15); temp=P1; if(temp!=0xf0) { P1=0xfe; temp=P1; switch(temp) { case(0xee):key=0;break; case(0xde):key=1;break; case(0xbe):key=2;break; case(0x7e):key=3;break; } P1=0xfd; temp=P1; switch(temp) { case(0xed):key=4;break; case(0xdd):key=5;break; case(0xbd):key=6;break; case(0x7d):key=7;break; } P1=0xfb; temp=P1; switch(temp) { case(0xeb):key=8;break; case(0xdb):key=9;break; case(0xbb):key=10;break; case(0x7b):key=11;break; } P1=0xf7; temp=P1; switch(temp) { case(0xe7):key=12;break; case(0xd7):key=13;break; case(0xb7):key=14;break; case(0x77):key=15;break; } } } } void LED1() { unsigned int i,j; for(j=5;j>0;j--) { for(i=0;i<=7;i++) { P0=led[i]; delay1ms(500); } } } void Display(int num) { P3=0xf1; P2=Tab[num/100]; delay1ms(1); P3=0xf2; P2=Tab[num/10%10]; delay1ms(1); P3=0xf4; P2=Tab[num%10]; delay1ms(1); } void main() { while(1) { panduan_K16(); if(floag1==0) { keypro(); if(key==0) { panduan_K17(); panduan_K18(); Display(num); } if(key!=0) { Display(key); } } if(floag1==1) { LED1(); floag1=0; } } }