_8255.h

51单片机扩展IO口的8255驱动程序

#include "MYTYPE.H"
#ifndef __8255_H_
#define __8255_H_
#define W8255_1CMD  XBYTE[0x9fffL]
#define W8255_1A    XBYTE[0x9ffcL]
#define W8255_1B    XBYTE[0x9ffdL]
#define W8255_1C    XBYTE[0x9ffeL]

#define W8255_2CMD  XBYTE[0xa7ffL]
#define W8255_2A    XBYTE[0xa7fcL]
#define W8255_2B    XBYTE[0xa7fdL]
#define W8255_2C    XBYTE[0xa7feL]

extern W8255_1(uchar cd,char world);
extern uchar R8255_1(uchar cd);

extern W8255_2(uchar cd,char world);
extern uchar R8255_2(uchar cd);

#endif