0809.c

基于80C51的AD转换程序

#include <absacc.h>
#include <reg51.h>
#define IN0 XBYTE[0x7ff8]
unsigned char   disbit[]={0xfe,0xfd,0xfb,0xf7};
unsigned char   discode[]={0x3f,0x06,0x5b,0x4f, 0x66,0x6d,0x7d,0x07,0x7f,0x6f};
unsigned char   disbuf[]={0,0,0,0};
unsigned char ad[ ]={15,35,15,34,134,36,89,255};
unsigned char j;
void delay(unsigned char N)
{
   unsigned char i;
   for(i=0;i<N;i++);
}
void display(unsigned char ch)
{  
   unsigned char k;
   disbuf[0]=ch%10;
   disbuf[1]=ch/10%10;
   disbuf[2]=ch/100;
   disbuf[3]=j;
   for(k=0;k<4;k++)
          {
            P2=0xff;
            P1=discode[disbuf[k]];
            P2=disbit[k];
          }
}
   
void read_ch(void)
{  
   unsigned char *Adr=&IN0;
   unsigned char i;
   for(i=0;i<8;i++)
   { 
     *(Adr+i)=i;
     delay(100);
     ad[i]=*(Adr+i);
   }
}
main()
{
  unsigned int m;
  
  while(1)
  { 
    
    read_ch();
    for(j=0;j<8;j++)
    {        
       for(m=0;m<2555;m++)
       { 
	      
 	      display(ad[j]);
        }
     }
   }
}