public.h

用单片机ATMEGA16写的PS2键盘驱动程序

/*******************************************************************
 模块功能：公共模块
 硬件环境: ATMEGA16, 外部7.3728MHz晶振
 软件环境：ICCAVR 6.31
 版本日期：V1.0  (2007.12.25)
 作    者：TOM
 备    注：
*******************************************************************/
#ifndef __PUBLIC_H
#define __PUBLIC_H

#include <macros.h>   

#define	SETBIT(x,y) (x|=(1<<y))      /* set bit y in byte x */
#define	CLRBIT(x,y) (x&=(~(1<<y)))   /* clear bit y in byte x */
#define	CHKBIT(x,y) (x&(1<<y))       /* check bit y in byte x */

typedef unsigned char U_8 ;
typedef signed char U_8S;
typedef unsigned int U_16;
typedef signed int U_16S;
typedef unsigned U_32;
typedef signed long U_32S;

//Typedef float FP_32;
//Typedef double FP_64;

#endif