lesson7c.c

单片机实验

#include <reg51.h>
#include <absacc.h>
#define WR_COM XBYTE[0xC000]
#define RD_STA XBYTE[0xC200]
#define WR_DAT XBYTE[0xC100]
#define RD_DAT XBYTE[0xC300]
#define AD_ADD XBYTE[0x0000]
#define uchar unsigned char
#define uint  unsigned int
uchar  ADdat;

uint   Voltrel;
uchar  num[3];
uchar code dat[]={"0123456789abcdef"};

uchar code dat1[]={"Vx="};
//延时程序
void  delay()
{
uchar  i;
for(i=0;i<125;i++)
;
}
//LCD写指令
void  WRCOM(uchar com)
{
uchar  i;
WR_COM=com;  
for(i=0;i<50;i++)
    delay();
}
//LCD写数据
void  WRDAT(uchar dat)
{
WR_DAT=dat;  
delay();
}
//LCD初始化
void  Init_LCD()
{
  WRCOM(0x38);         //设置为8位数据总线，16*2，5*7点阵
  WRCOM(0x01);        //清屏幕
  WRCOM(0x06);       //光标移动，显示区不移动，读写操作后AC加1
  WRCOM(0x0C);
}
//AD转换程序（采用中断）
void  intt0()interrupt 0
{
ADdat=AD_ADD;
EX0=1;IT0=1;EA=1;
}
//主程序
main()
{
Init_LCD();
EX0=1;IT0=1; 
EA=1;
while(1)
{
  uint  i=0;

  uint  j=0;
  AD_ADD=0X00;
  //delay();
  Voltrel=ADdat*1.0*500/255;
  num[0]=Voltrel/1000;
  num[1]=Voltrel%1000/100;
  num[2]=Voltrel%1000%100/10;
  num[3]=Voltrel%1000%100%10;
  WRCOM(0x80);
  while(i!=3)
  {
   WRDAT(dat1[i]);
   i++;
  }
  while(j!=2)
  {
   WRDAT(dat[num[j]]);
   j++;
  }
   WRDAT('.');
  while(j!=4)
  {
   WRDAT(dat[num[j]]);
   j++;
  }
  WRDAT('v');
 } 
}