怎么有的语句它不执行的呢

2万 · 2018-10-19 20:03

在做仿真调试时，怎么有的语句它不执行的呢，编译时也没有提示出错

2万 · 2018-10-19 20:06

可能和编译优化级别有关系

2万 · 2018-10-19 20:09

哪条语句不执行

1万 · 2018-10-19 20:12

优化掉了

2万 · 2018-10-19 20:15

降低优化等级也不行

2万 · 2018-10-19 20:20

整合优化到公共部分去了

2万 · 2018-10-19 20:23

把优化关掉试试看

2万 · 2018-10-20 11:27

怎么操作才可以关掉优化呢？

2万 · 2018-10-20 11:31

源程序看看

只看该作者 · 2018-10-20 11:34

sec的值不会变的，不知道怎么回事？

#include <reg52.h>
#define uchar unsigned char
#define uint unsigned int
sbit rs=P1^0;
sbit rw=P1^1;
sbit ne=P1^2;
uchar code table[]="0123456789:";
uchar num,sec,tcnt,min,h;
void delay_lcd(uchar a)
{
      uchar x,y;
      for(x=a;x>0;x--)
            for(y=110;y>0;y--)
            {}

}

void init_lcd()
{

      ne=0;
      write_lcdcom(0x38);
      write_lcdcom(0x0c);
      write_lcdcom(0x06);
      write_lcdcom(0x01);

}

void write_lcddata(uchar date)
{
      rs=1;
      rw=0;
      P2=date;
      delay_lcd(5);
      ne=1;
      delay_lcd(5);
      ne=0;


}

void write_lcdcom(uchar com)
{

      rs=0;
      rw=0;
      P2=com;
      delay_lcd(5);
      ne=1;
      delay_lcd(5);
      ne=0;

}
void tim()
{
            uchar h,min,sec;
      if(tcnt==20)
      {
            tcnt=0;
            sec++;

            if(sec==60)
                     {
                              sec=0;
                              min++ ;
                              if(min==60)
                              {
                                    min=0;
                                    h++;
                                    if(h==24)
                                    h=0;

                              }
                     }

      }
}

void display(uchar shi,ge)
{
      write_lcdcom(0x80+0x0a);
      write_lcddata(table[ge]);
      write_lcdcom(0x80+0x09);
      write_lcddata(table[shi]);
}

/*void display(uchar h_ch,uchar h_ge,uchar minsh_a,uchar minge_a,uchar sh_a,uchar ge_a)
{

      write_lcdcom(0x80+0x0a);
      write_lcddata(table[ge_a]);
      write_lcdcom(0x80+0x09);
      write_lcddata(table[sh_a]);

      write_lcdcom(0x80+0x07);
      write_lcddata(table[minge_a]);
      write_lcdcom(0x80+0x06);
      write_lcddata(table[minsh_a]);

      write_lcdcom(0x80+0x04);
      write_lcddata(table[h_ge]);
      write_lcdcom(0x80+0x03);
      write_lcddata(table[h_ch]);

} */

void main()
{


      init_lcd();
      write_lcdcom(0x80+0x08);
      write_lcddata(table[10]);
      write_lcdcom(0x80+0x05);
      write_lcddata(table[10]);

      TMOD=0X01;

      TH0=(65535-50000)/255;
      TL0=(65535-50000)%255;
      ET0=1;
      EA=1;
      TR0=1;

      while(1)
            {
//                      display(h/10,h%10,min/10,min%10,sec/10,sec%10);
                     tim();
                     display(sec/10,sec%10);
            }
      }

void t0()interrupt 1
{

      TH0=(65535-50000)/255;
      TL0=(65535-50000)%255;
      tcnt++;

}