单片机c51设计简易计算器数码管显示

#include <reg52.h> #include <intrins.h> #define uchar unsigned char #define uint unsigned int sbit beep=P3^0; uchar aa,flag=0,op,flag1,flag2; long diyi,dier,jieguo; uchar code KeyCodeTable[]= { 0x28,0x14,0x24,0x44,0x12,0x22,0x42,0x11,0x21,0x41,0x88,0x84,0x82,0x81,0x48,0x18 }; uchar code dula[]={0xdf,0xef,0xf7,0xfb,0xfd,0xfe}; uchar code table[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x00}; uchar buffer[6]={0,10,10,10,10,10}; void delay(uint z) { uint x,y; for(x=z;x>0;x--) for(y=110;y>0;y--); } uchar Keys_Scan() { uchar sCode,kCode,i,k,tmp; P1 = 0xf0; if((P1&0xf0)!=0xf0) { delay(1); if((P1&0xf0)!=0xf0) { sCode = 0xfe; for(k=0;k<4;k++) { P1 = sCode; if((P1&0xf0)!=0xf0) { kCode = ~P1; for(i=0;i<16;i++) { if(kCode == KeyCodeTable[i]) { P1=0xf0; while(1) { tmp=P1; if(tmp==0xf0) {break;} } flag2++; return i; } } } sCode = _crol_(sCode,1); } } } return 16; } void doo(uchar key) { uchar i,n,k,a[6],b[6],c[6]; long m; if((key>=0)&&(key<=9)) { if(flag==1) { flag=0; for(i=0;i<6;i++) buffer[i]=10; } if(flag2==1) buffer[0]=10; for(i=0;i<5;i++) buffer[5-i]=buffer[4-i]; buffer[0]=key; } if((key>=10)&&(key<=13)) { op=key; for(i=0;i<6;i++) { a[i]=buffer[i]; if(a[i]==10) a[i]=0; } diyi=a[5]*100000+a[4]*10000+a[3]*1000+a[2]*100+a[1]*10+a[0]; flag=1; } if(key==14) { for(i=0;i<6;i++) { b[i]=buffer[i]; if(b[i]==10) b[i]=0; } dier=b[5]*100000+b[4]*10000+b[3]*1000+b[2]*100+b[1]*10+b[0]; switch(op) { case 10: jieguo=diyi+dier; break; case 11: jieguo=diyi-dier; break; case 12: jieguo=diyi*dier; break; case 13: m=diyi/dier; n=diyi%dier*10/dier;k=diyi%dier*10%dier*10/dier; break; default: break; } if(op==13) { flag1=1; buffer[0]=k; buffer[1]=n; for(i=2;i<6;i++) { c[i]=m%10; m=m/10; } i=5; while((c[i]==0)&&(i>2)) { c[i]=10; i--; } for(i=2;i<6;i++) buffer[i]=c[i]; } else { for(i=0;i<6;i++) { c[i]=jieguo%10; jieguo=jieguo/10; } i=5; while(c[i]==0) { c[i]=10; i--; if(i==255) break; } for(i=0;i<6;i++) buffer[i]=c[i]; } } if(key==15) { for(i=0;i<6;i++) buffer[i]=10; buffer[0]=0; flag=0; flag1=0; flag2=0; } } /*void display() { P2=dula[aa]; if((flag1==1)&&(aa==2)) P0=table[buffer[aa]]|0x80; else P0=table[buffer[aa]]; delay(2); aa++; if(aa==6) aa=0; }*/ void main() { uchar keynum; TMOD=0x01; EA=1; ET0=1; TH0=(65536-7000)/256; TL0=(65536-7000)%256; TR0=1; while(1) { keynum= Keys_Scan(); if(keynum!=16) { beep=0; delay(50); beep=1; doo(keynum); } // display(); } } void Time0() interrupt 1 { P2=dula[aa]; if((flag1==1)&&(aa==2)) P0=table[buffer[aa]]|0x80; else P0=table[buffer[aa]]; delay(2); aa++; if(aa==6) aa=0; TH0=(65536-7000)/256; TL0=(65536-7000)%256; }