简易单片机计算器，最基础的

ID:1109513 · 发表于 2024-1-17 16:32

刚学到，求助多功能计算器的设计

代码：

#include       "reg51.h"
#include       "math.h"
#define       ON             10
#define       ADD                11
#define       SUB                12
#define       MUL                13
#define       DIV       14
#define       EQU       15
#define       BLANK       10
#define       ERROR       11
#define       MINUS       12
sbit       SPEAKER = P3^7;
long Result,VarTmp;
unsigned char code LED[]={0xC0,0xF9,0xA4,0xB0,0x99,0x92,0x82,0xF8,0x80,0x90,0xff,0x86,0xbf};

unsigned char code KeyTable[]={ON,0,EQU,ADD,1,2,3,SUB,4,5,6,MUL,7,8,9,DIV};
unsigned char DisplayNo ,Operate,MS,DisplayBuffer[8];
bit Over,NoError=1,FirstInput=1;
unsigned int BeepTime,DelayTime;
void delayms(unsigned int ms)
{       DelayTime=ms;
      while(DelayTime);
}
unsigned char Key()
{       unsigned char Row,Col,k;
            P1=0x0f;
            k=P1&0x0f;
            if(k==0x0f)       return -1;
      delayms(20);
            k=P1&0x0f;
            if(k==0x0f)       return -1;
            BeepTime=300;
            for(Row=0;Row<4;Row++)
            {       P1=0x7f>>Row;
                     k=P1&0x0f;
                     if(k!=0x0f)
                     {       Col=0;
                              while(k&(1<<Col))       Col++;
                              break;
            }       }
            while((P1&0x0f)!=0x0f);
            k= Row+Col*4;
            return KeyTable[k];
}
void ClrDisplayBuffer()
{       unsigned char i;
            for(i=0;i<7;i++)
                     DisplayBuffer[ i]=BLANK;
            DisplayBuffer[7]=0;
}
void ModifyDisplayBuffer(long num)
{       unsigned char i;
            if(num>9999999||num<-9999999)
            {       ClrDisplayBuffer();
                     DisplayBuffer[0]=ERROR;
                     NoError=0;
                     return;
            }
            ClrDisplayBuffer();
            if(num<0)
            {       num=labs(num);
                        DisplayBuffer[0]=MINUS;
            }
            i=7;
      do
      {       DisplayBuffer[ i]=num%10;
                     num/=10;
                     i--;
            }while(num!=0);
}
void Calculate()
{       switch(Operate)
            {       case ADD:
                                    Result=Result+VarTmp;
                              ModifyDisplayBuffer(Result);
                                    break;
                     case SUB:
                                    Result=Result-VarTmp;
                              ModifyDisplayBuffer(Result);
                                    break;
                     case MUL:
                                    Result=Result*VarTmp;
                                    ModifyDisplayBuffer(Result);
                                    break;
                     case DIV:
                                    if(VarTmp!=0)
                                    {       Result=Result/VarTmp;
                                       ModifyDisplayBuffer(Result);
                                    }
                                    else
                                    {       ClrDisplayBuffer();
                                             DisplayBuffer[0]=ERROR;
                                             NoError=0;
                                    }
                                    break;
}       }
void KeyProcess(unsigned char k)
{       if(k==ON)
            {       Result=0,       VarTmp=0,Operate=0,Over=0,NoError=1,FirstInput=1;
                     ClrDisplayBuffer();
            }
            if(!NoError)       return;
            if(k<10)
            {       if(Over)       Over=0,VarTmp=0,Result=0,Operate=0,FirstInput=1;
                     VarTmp=VarTmp*10+k;
                     if(VarTmp>9999999)             VarTmp=VarTmp/10;
                     if(Operate)             FirstInput=0;
                     ModifyDisplayBuffer(VarTmp);
            }
            if(k>10&&k<15)
            {       if(Over)
                     {       Over=0,VarTmp=0,FirstInput=1, Operate=k;
                              return;
                     }
                     if(Operate&&FirstInput==0)
                     {       Calculate();
                              VarTmp=0,FirstInput=1;
                     }
                     if(Operate==0)
                     {       Result=VarTmp;
                              VarTmp=0;
                     }
                     Operate=k;
            }
            if(k==EQU)
            {       if(Operate&&FirstInput==0)
                     {       Calculate();
                              Over=1;
}             }       }
void main()
{       unsigned char k;
            TMOD=1;
            TR0=1;
            ET0=1;
            EA=1;
            ClrDisplayBuffer();
            while(1)
            {       k=Key();
                     if(k!=-1)
                              KeyProcess(k);
}             }

void Display() interrupt 1
{       TL0=64536%256;
            TH0=64536/256;
      if(DelayTime)DelayTime--;
            if(BeepTime)
            {       BeepTime--;
                     SPEAKER=~SPEAKER;
            }
            P2=0;
      P0=LED[DisplayBuffer[DisplayNo]];
            P2=1<<DisplayNo;
            if(++DisplayNo==8)
                     DisplayNo=0;
}

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