基于51单片机的计算器

/* * Copyright (c) 2009,301创新实验室 * All rights reserved. * * 文件名称：calc.c * 文件标识： * 摘 要：单片机课程设计--计算器 * * 当前版本：Debug. * 作 者：祝高锋 * 完成日期：2009年3月17日 */ #include <at89x51.h> #include <math.h> #include <intrins.h> unsigned long TimeCount=0; unsigned char code LED_TABLE[]={ 0xD7,0x14,0xCD,0x5D,0x1E,0x5B,0xDB,0x15,0xDF,0x5F,0X00}; unsigned char code LED_N[8]={0xfe,0xfd,0xfb,0xf7,0xef,0xdf,0xbf,0x7f}; unsigned char k; //test unsigned char data m = 0x00; unsigned char data n = 0xfe; unsigned char keynum; bit keycon,getkey; unsigned char calc_mode=0;//计算器模式; unsigned char ledcode[8];//存储显示的断码 unsigned char calc_val[7],val_location=0,point_location=0; //键值判断 float val1=0,val2=0,val; //val为显示的数据 bit neg_val=0;//数值正负判断 bit first_in=1;//双目运算判断位置;1为第一次输入 bit point_on=0; bit calcend=0; //一次计算完毕 bit keyinend=0;//一次输入完毕; bit clearzero=0; unsigned char calc_symbol=0; #include <computing.h> #include <leddisplay.h> #include <key.h> void int_key() interrupt 1 { TimeCount++; TH0=-4230/256; TL0=-4230%256; if(keycon==1) { scankey(); } keycon=!keycon; } void int_Out() interrupt 0 { TH0=-4230/256; TL0=-4230%256; ET0=1; TR0=1; EX0=0; PCON=0x00; } void main() { TMOD=0x01; TH0=-4230/256; TL0=-4230%256; ET0=1; TR0=1; EA=1; while(1) { if(TimeCount>(2500*2)) { TimeCount=0; P0=0x00; P2=0xff; // ET0=0; // EX0=1; PCON=PD_; } if(getkey==1) { TimeCount=0; getkey=0; if(calcend==1) { calcend=0; val=0; for(k=1;k<7;k++){ledcode[k]=0x00;} ledcode[0]=0xd7; } if(keynum<0x0a) { clearzero=0; if(val_location<7) { calc_val[val_location]=keynum; for(k=val_location;k>0;k--){ledcode[k]=ledcode[k-1];} ledcode[0]=LED_TABLE[keynum]; val=val*10+calc_val[val_location]; val_location++; } } else { if(keynum==0x0a) //小数点 { if(point_on==0) { ledcode[0]=ledcode[0]+0x20; point_location=val_location; point_on=1; } } if(keynum==0x0b) //负号 { if(val_location==0) { neg_val=!neg_val; } } if(keynum==0x0c) //mode { if(calc_mode==2){calc_mode=0;}else{calc_mode++;} ledcode[7]=LED_TABLE[calc_mode]; calcend=1; } if(keynum==0x0e) //CE { calcend=1; val=0; for(k=1;k<7;k++){ledcode[k]=0x00;} ledcode[0]=0xd7; } if((keynum>=0x0f)&(first_in==1)&(val_location!=0)) //运算符 { computing(keynum,calc_mode); } if((keynum==0x0d)) //等于号的运算 { clearzero=1; if(point_on==1) { val=val/pow(10,val_location-point_location); } val2=val; if(neg_val==1) { val2=(-1)*val2; neg_val=0; } switch(calc_symbol) { case 1: val=val1-val2; break; case 2: val=val1+val2; break; case 3: val=val1/val2; break; case 4: val=val1*val2; break; case 5: val=pow(val1,val2); break; case 6: val=log(val1)/log(val2); default:break; } calcend=1; } } } if(calcend==1) //一次计算完毕 进入等待 { calc_symbol=0; val_location=0; neg_val=0; val1=0; val2=0; for(k=0;k<7;k++){calc_val[k]=0;} first_in=1; point_on=0; } if(neg_val==1) //显示模式 { ledcode[7]=0x08; } else { ledcode[7]=LED_TABLE[calc_mode]; } if(clearzero==1) { display(val); } else { for(m = 0; m < 8; m++) { P2 = n; P0 = ledcode[m]; delayms(1); n = _crol_(n,1); } } } }