51单片机四位数码管计算器 Proteus仿真程序

#include <REGX52.H> void display(int num1); void DelayXms(unsigned int x); void keyScan(); void keyAdd(); void pd(); int n1, n2, n3, n4, numKey=10000, num=0, num0=0; char fuhao='0',fuhao0='0'; unsigned char duan[11]={0xC0,0xF9,0xA4,0xB0,0x99,0x92,0x82,0xF8,0x80,0x90,0x86}; void main(){ while(1){ keyScan(); pd(); display(num); } } void keyAdd(){ if(numKey<10000){ num=num*10+numKey; numKey=10000; } } void pd(){ keyAdd(); if(fuhao=='c'){ num=0; num0=0; fuhao0='0'; fuhao='0'; } if(fuhao=='+'){ fuhao0='+'; fuhao='0'; num0=num; num=0; } if(fuhao=='-'){ fuhao0='-'; fuhao='0'; num0=num; num=0; } if(fuhao=='*'){ fuhao0='*'; fuhao='0'; num0=num; num=0; } if(fuhao=='/'){ fuhao0='/'; fuhao='0'; num0=num; num=0; } if(fuhao=='='){ if(fuhao0=='+')num=num0+num; else if(fuhao0=='-')num=num0-num; else if(fuhao0=='*')num=num0*num; else if(fuhao0=='/')num=num0/num; fuhao='0'; num0=0; } } void keyScan(){ P3=0xef;//1110 1111 if(!P3_3){numKey=7;while(!P3_3);}if(!P3_2){numKey=8;while(!P3_2);}if(!P3_1){numKey=9;while(!P3_1);}if(!P3_0){fuhao='/';while(!P3_0);} P3=0xdf; if(!P3_3){numKey=4;while(!P3_3);}if(!P3_2){numKey=5;while(!P3_2);}if(!P3_1){numKey=6;while(!P3_1);}if(!P3_0){fuhao='*';while(!P3_0);} P3=0xbf; if(!P3_3){numKey=1;while(!P3_3);}if(!P3_2){numKey=2;while(!P3_2);}if(!P3_1){numKey=3;while(!P3_1);}if(!P3_0){fuhao='-';while(!P3_0);} P3=0x7f; if(!P3_3){fuhao='c';while(!P3_3);}if(!P3_2){numKey=0;while(!P3_2);}if(!P3_1){fuhao='=';while(!P3_1);}if(!P3_0){fuhao='+';while(!P3_0);} } void display(int num1){ if(num1<= 9999) { n4=num1%10; n3=num1/10%10; n2=num1/100%10; n1=num1/1000%10; P2=0x01; P0=duan[n1]; DelayXms(4); P2=0x02; P0=duan[n2]; DelayXms(4); P2=0x04; P0=duan[n3]; DelayXms(4); P2=0x08; P0=duan[n4]; DelayXms(4); } else { P2=0x01; P0=duan[10]; DelayXms(4); P2=0x02; P0=duan[10]; DelayXms(4); P2=0x04; P0=duan[10]; DelayXms(4); P2=0x08; P0=duan[10]; DelayXms(4); } } void DelayXms(unsigned int x) { unsigned char i, j; while(x--) { i = 2; j = 239; do{while (--j); }while (--i); } }