threeio.h

一个基于单片机IO的键盘扫描函数

//**************************************************
//           3个IO口键盘驱动程序
//**************************************************

#ifndef _ThreeIO_h
#define _ThreeIO_h

typedef signed   char 	     int8;
typedef unsigned char 	     uint8;

typedef signed   int 	     int16;
typedef unsigned int 	     uint16;

typedef signed   long int     int32;
typedef unsigned long int     uint32;

typedef float                  fp32;
typedef double                 fp64;


#define key_dat P1		      //定义键盘接口

extern uint8 Keyscan(void);	  //键盘扫描函数

#endif