求解51单片机串口打印疑难杂症，请各位大侠拔刀相助！！！

2019-07-16 03:59发布

郭天祥的《51单片机C语言教程》书上例6.6.1
file:///C:Documents and SettingsAdministratorApplication DataTencentUsers768125236QQWinTempRichOle\%PU(I}R]5(TO{BAVSA{X$ZC.jpg
QQ截图20121105223612.png

调试下面的程序就出现上面的情况，连hex文件都生成不了，不知道怎么回事们请指点迷津！！！
#include<reg52.h>
#include<intrins.h>
#include<stdio.h>
#define uint unsigned int
#define uchar unsigned char
sbit dula=P2^6;
sbit wela=P2^7;
sbit adwr=P3^6;
sbit adrd=P3^7;
uchar flag,a;
unsigned char num,flag1,flagt,ad_val;
float ad_vo;
uchar code table[]={
0x3f,0x06,0x5b,0x4f,
0x66,0x6d,0x7d,0x07,
0x7f,0x6f,0x77,0x7c,
0x39,0x5e,0x79,0x71};
void delay(uchar z)
{
uchar x,y;
for(x=z;x>0;x--)
   for(y=110;y>0;y--);
}
void init()
{
TMOD=0x21;
SCON=0x50;
TH0=(65535-50000)/256;
TL0=(65535-50000)%256;
TH1=0xfd;
TL1=0xfd;
TR1=1;
ET0=1;
// SM0=0;
// SM1=1;
// REN=1;
EA=1;
ES=1;
}
void display(uint temp)
{
uchar a1,a2,a3;
a1=temp/100;
a2=(temp%100)/10;
a3=temp%10;

dula=1;
P0=table[a1];
dula=0;
P0=0xff;
wela=1;
P0=0x7e;
wela=0;
delay(5);

dula=1;
P0=table[a2];
dula=0;
P0=0xff;
wela=1;
P0=0x7d;
wela=0;
delay(5);

dula=1;
P0=table[a3];
dula=0;
P0=0xff;
wela=1;
P0=0x7b;
wela=0;
delay(5);
}
uchar get_ad()
{
uchar adval;
adwr=1;
_nop_();
adwr=0;
_nop_();
adwr=1;

P1=0xff;
adrd=1;
_nop_();
adrd=0;
_nop_();
adval=P1;
adrd=1;
return adval;
}

void main()
{
init();
wela=1;
P0=0x7f;
wela=0;
while(1)
{
      if(flag==1)
         {
            flag=0;
            ES=0;
            TI=1;
            switch(flag1)
               {
                  case 0:puts("turn on ad! ");
                        TR0=1;
                        break;
                  case 1:printf("turn off ad! ");
                        TR0=0;
                        break;
                  case 2:puts("error! ");
                        break;
               }
                  while(!TI);
                  TI=0;
                  ES=1;
         }
      if(flagt==1)
         {
            flagt=0;
            ad_val=get_ad();
            ad_vo=(float)ad_val*5.0/256.0;
            ES=0;
            TI=1;
            printf("The voltage is %fV ",ad_vo);
            while(!TI);
            TI=0;
            ES=1;
         }
      display(ad_val);
}
}
void time0() interrupt 1
{
TH0=(65535-50000)/256;
TL0=(65535-50000)%256;
num++;
if(num==20)
      {
         num=0;
         flagt=1;
      } ;
}
void ser()interrupt 4
{
RI=0;
a=SBUF;
flag=1;
if(a==1)
   flag1=0;
else if(a==2)
         flag1=1;
      else
         flag1=2;
}

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