ad574.c

来自「不少单片机C代码」· C语言 代码 · 共 25 行

#include <absacc.h>
#include <reg51.h>
#define uint unsigned int
#define ADCOM XBYTE[0xff7c]
#define ADLO  XBYTE[0xff7f]
#define ADHI  XBYTE[0xff7d]

sbit r=P3^7;
sbit w=P3^6;
sbit adbusy=P1^0;

uint  ad574(void)       
{ 
  r=0;
  w=0;
  ADCOM=0;
  while(adbusy==1);
  return ((uint)(ADHI<<4+(ADLO&0x0f)));
}

main()
{ uint idata result;
  result=ad574();
}