请教个AD转换程序

只看该作者 · 2010-12-31 15:24

#include  <stc_new_8051.H>
#define  uchar unsigned char
#define  uint unsigned int
sbit  duan=P2^7;
sbit  wei=P2^6;
uchar code  table[]={
0x3f,0x06,0x5b,0x4f,
0x66,0x6d,0x7d,0x07,
0x7f,0x6f,0xbf,0x86,
0xdb,0xcf,0xe6,0xed,
0xfd,0x87,0xff,0xef};
void  delayms(uint xms)
{
   uint i,j;
  for (i=xms;i>0;i--)
   for (j=110;j>0;j--);
}
void display(uchar bai ,uchar  shi,uchar  ge)
{
  duan=1;
  P0=table[bai];
  duan=0;
  P0=0xff;
  wei=1;
  P0=0x7e;
  wei=0;
  delayms(5);
  duan=1;
  P0=table[shi];
  duan=0;
  P0=0xff;
  wei=1;
  P0=0x7d;
  wei=0;
  delayms(5);
  duan=1;
  P0=table[ge];
  duan=0;
  P0=0xff;
  wei=1;
  P0=0x7b;
  wei=0;
  delayms(5);
}
  void main()
{
  uchar A1,A2,A3,wendu,adval;
  uint i;
  ADC_CONTR|=0x80;//开AD转换电源
  for  (i=0;i<10000;i++);
  P1ASF=0x01; //选P1.0作为转换通道
  for  (i=0;i<10000;i++);
  ADC_CONTR|=0xE0;//
  AUXR1|=0x04;  //ADRJ=1
  ADC_CONTR|=0x08; //启动
  EADC=1;  //开AD中断
  EA=1;
  while(1); //等待中断
  adval=ADC_RESL;
  wendu=(adval*0.00527+1)/0.0075;
  A1=wendu/100;
  A2=wendu%100/10;
  A3=wendu%10;
  display(A1,A2,A3);
}
  void ADC_ISR (void)  interrupt  5 //中断函数
{
  uchar adval;
  adval=ADC_RESL;
  wendu=(adval*0.00527+1)/0.0075;
  A1=wendu/100;
  A2=wendu%100/10;
  A3=wendu%1;
  display(A1,A2,A3);
  ADC_CONTR&=0xE7;  //将标志位清零
  adval=ADC_RESL;
  ADC_CONTR|=0x08;  //重新启动AD
}

程序运行不成功，请大侠指点一下呗。