#include <reg52.h>

#include <absacc.h>



#define uchar unsigned char



#define PA8255 XBYTE[0x3ffc]

#define PB8255 XBYTE[0x3ffd]

#define PC8255 XBYTE[0x3ffe]

#define COM8255 XBYTE[0x3fff]

#define IN0 XBYTE[0x1000]



void ADC(void)

sbit cs138=P1^6

uchar AdcValue



main()

{cs138=0

COM8255=0x81

EA=1

IE=0x81

IT0=1

IN0=0

while(1)

　　{PA8255=PB8255=AdcValue }

}



void ADC(void) interrupt 0 using 1

{AdcValue=IN0

IN0=0

}