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標(biāo)題: 單片機(jī)數(shù)碼管顯示的簡易計算器按下鍵后數(shù)碼管沒反應(yīng) 求幫助 [打印本頁]

作者: 1209278232 時間: 2019-2-15 18:52
標(biāo)題: 單片機(jī)數(shù)碼管顯示的簡易計算器按下鍵后數(shù)碼管沒反應(yīng) 求幫助
為什么這個用數(shù)碼管顯示的簡易計算器程序無法顯示，按下鍵后數(shù)碼管沒反應(yīng)，按等號直接顯示235
求各位大佬救急

/*
1 2 3 *
4 5 6 /
7 8 9 無
+ 0 - =
*/
#include<reg52.h>
typedef unsigned char uchar;
typedef unsigned int uint;
sbit LS1=P2^2;
sbit LS2=P2^3;
sbit LS3=P2^4;
uint key,flag=0,x1=0,y1=0,x=10,a=0,b=0,fuhao=0,answer=0,m_1=0,m_2=0,m_3=0,m_4=0;

char led[10]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f };

void delay_ms(uint time)
{
      int i,j;
      for(i=0;i<100;i++)
      {
            for(j=0;j<time;j++);
      }
}

void output(uint answer,uint a//顯示函數(shù)
{
      if(answer>=0&&answer<=9)
                     {
                              LS1=0;
                              LS2=0;
                              LS3=0;
                              while(1)
                              {
                                    P0=led[answer];
                                    if(a==1)
                                             break;
                              }
                     }
                     if(answer>=10&&answer<=99)
                     {
                              m_1=answer%10;
                              m_2=answer/10;
                              while(1)
                              {
                                    LS1=0;LS2=0;LS3=0;
                                    P0=led[m_1];
                                    delay_ms(1);
                                    LS2=0;
                                    P0=led[m_2];
                                    delay_ms(1);
                                    if(a==1)
                                             break;
                              }
                     }
                        if(answer>=100&&answer<=999)
                     {
                              m_1=answer%10;
                              m_3=answer/100;
                              m_2=(answer-m_3*100)/10;
                              while(1)
                              {
                                    LS1=0;LS2=0;LS3=0;
                                    P0=led[m_1];
                                    delay_ms(1);
                                    LS1=1;LS2=0;LS3=0;
                                    P0=led[m_2];
                                    delay_ms(1);
                                    LS1=0;LS2=1;LS3=0;
                                    P0=led[m_3];
                                    delay_ms(1);
                                    if(a==1)
                                             break;
                              }
                     }
                     if(answer>=1000&&answer<=9999)
                     {
                              m_1=answer%10;
                              m_2=(answer/100)%10;
                              m_4=answer/1000;
                              m_3=(answer-m_4*1000)/100;
                              while(1)
                              {
                                    LS1=0;LS2=0;LS3=0;
                                    P0=led[m_1];
                                    delay_ms(1);
                                    LS1=1;LS2=0;LS3=0;
                                    P0=led[m_2];
                                    delay_ms(1);
                                    LS1=0;LS2=1;LS3=0;
                                    P0=led[m_3];
                                    delay_ms(1);
                                    LS1=1;LS2=1;LS3=0;
                                    P0=led[m_4];
                                    delay_ms(1);
                                    if(a==1)
                                             break;
                              }
                     }
}

void computer()
{
      P1=0xf0;
      if(P1!=0xf0)
      {
            delay_ms(100);
            a=P1;
      }
      P1=0x0f;
      if(P1!=0x0f)
      {
            b=P1;
            key=a|b;
      }
      switch(key)
      {
            case 0x77:x=1;flag=0;break;
            case 0x7b:x=2;flag=0;break;
            case 0x7d:x=3;flag=0;break;
            case 0xb7:x=4;flag=0;break;
            case 0xbb:x=5;flag=0;break;
            case 0xbd:x=6;flag=0;break;
            case 0xd7:x=7;flag=0;break;
               case 0xdb:x=8;flag=0;break;
            case 0xdd:x=9;flag=0;break;
            case 0xeb:x=0;flag=0;break;
            case 0xe7:fuhao=1;break;// +
            case 0xed:fuhao=2;break;// -
            case 0xbe:fuhao=3;break;// *
            case 0xde:fuhao=4;break;// /
            case 0xee:

                              if(fuhao==1)
                              {
                                       answer=a+b;
                                    output(answer,0);
                              }
                              if(fuhao==2)
                              {
                                       answer=a-b;
                                    output(answer,0);
                              }
                              if(fuhao==3)
                              {
                                       answer=a*b;
                                    output(answer,0);
                              }
                              if(fuhao==4)
                              {
                                       answer=a/b;
                                    output(answer,0);
                              }
                           break;// =
      }//掃描出鍵的值
      if(x>=0&&x<=9)
      {
            if(flag==0)       //沒有按下符號鍵
            {
                     a=a*10+x;
                     output(a,1);
            }
            else
            {
                     b=b*10+x;
                     output(b,1);
            }
      }
      else
      {
            flag=1;
      }
}

void main()
{
      while(1)
      {
            computer();
      }
}

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