两位数加减单片机程序，我下面代码要怎么改才能不按着按钮还亮 -

标题: 两位数加减单片机程序，我下面代码要怎么改才能不按着按钮还亮 [打印本页]

作者: GKJ12345 时间: 2017-5-7 16:21
标题: 两位数加减单片机程序，我下面代码要怎么改才能不按着按钮还亮
#include<reg51.h>
sbit add=P3^2;
sbit sub=P3^3;
bit add_bak;
bit sub_bak;
void delay(int num){
int k,l;
      for(k=0;k<num;k++)
            for(l=0;l<10;l++)
            ;
}
unsigned char table[10]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90};
unsigned char WeiMa[8]={0xfe,0xfd,0xfb,0xf7,0xef,0xdf,0xbf,0x7f};
int i,j,n,t;
void main()
{
      P2=WeiMa[7];
      P0=table[0];
      n=0;
      while(1){
                     if(add==0&&add_bak==1){
                              n++;
                              if(n>99){
                                    n=0;
                              }
                              i=n/10%10;
                              if(i>0){
                                    P2=WeiMa[6];
                                    P0=table;
                                    delay(10);
                                    P0=0xff;
                              }
                              else{
                                    P2=WeiMa[6];
                                    P0=table[0];
                                    delay(10);
                                    P0=0xff;
                              }
                              P2=0x00;
                              j=n%10;
                              P2=WeiMa[7];
                              P0=table[j];
                              delay(10);
                              P0=0xff;
                              P2=0x00;
                              add_bak=0;
                     }
                     if(add==1){
                              add_bak=1;
                     }


                     if(sub==0&&sub_bak==1){
                              n--;
                              if(n<0){
                                    n=99;
                              }
                              i=n/10%10;
                              if(i>0){
                                    P2=WeiMa[6];
                                    P0=table;
                                    delay(10);
                                    P0=0xff;
                              }
                              else{
                                    P2=WeiMa[6];
                                    P0=table[0];
                                    delay(10);
                                    P0=0xff;
                              }
                              P2=0x00;
                              j=n%10;
                              P2=WeiMa[7];
                              P0=table[j];
                              delay(10);
                              P0=0xff;
                              P2=0x00;
                              sub_bak=0;
            }

            if(sub==1){
                     sub_bak=1;
            }
      }
}

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