global.h

在51下的外挂硬盘和FLASH的MP3方案程序以及原理图

#ifndef _GLOBAL_DEFINE
 #define _GLOBAL_DEFINE

#define LOW		0		//高电平逻辑值
#define HIGH		1		//低电平逻辑值

#define FALSE		0		//逻辑假值
#define TRUE		1		//逻辑真值

//置位操作
#define SET_BIT_0(X)	X=X|0x01
#define SET_BIT_1(X)	X=X|0x02
#define SET_BIT_2(X)	X=X|0x04
#define SET_BIT_3(X)	X=X|0x08
#define SET_BIT_4(X)	X=X|0x10
#define SET_BIT_5(X)	X=X|0x20
#define SET_BIT_6(X)	X=X|0x40
#define SET_BIT_7(X)	X=X|0x80

//清零操作
#define CLEAR_BIT_0(X)	X=X&0xfe
#define CLEAR_BIT_1(X)	X=X&0xfd
#define CLEAR_BIT_2(X)	X=X&0xfb
#define CLEAR_BIT_3(X)	X=X&0xe7
#define CLEAR_BIT_4(X)	X=X&0xef
#define CLEAR_BIT_5(X)	X=X&0xdf
#define CLEAR_BIT_6(X)	X=X&0xbf
#define CLEAR_BIT_7(X)	X=X&0x7f

//#define DISK_SECTOR_SIZE	32

//数据类型定义


#ifndef _TYPE_DEFINE
 #define _TYPE_DEFINE
 typedef bit BOOL;
 typedef unsigned char BYTE;
 typedef unsigned char CHAR;
 typedef unsigned int WORD;
 typedef unsigned long DWORD;
#endif

#endif