irkey.h

标准键盘PS2与单片机之间的通信

/**********对外接口函数IrKeyHit(unsigned char da)***************/
/**********返回的按键值为  key	********************************/

#define	POWER 		-1
#define	UP	  		-2
#define	DOWN  		-3	
#define	ADD  		-4
#define	SUB  		-5
#define	MENU 		-6
#define	M_UP 		-7
#define	M_DOWN		-8
#define	M_LEFT		-9
#define	M_RIGHT 	-10
#define SILENCE		-11
#define SCREEN		-12
unsigned char key;
int IrKeyHit(unsigned char da)
{
    if(da == 0xc0)
	  	 key=1;
	else if(da == 0xa0)
		key=2;
	else if(da == 0xe0)
		key=3;
	else if(da == 0x90)
		key=4;
	else if(da == 0xd0)
		key=5;
	else if(da == 0xb0)
		key=6;	
	else if(da == 0xf0)
		key=7;
	else if(da == 0x88)
		key=8;
	else if(da == 0xc8)
		key=9;
	else if(da == 0x80)
		key=0;
	else if(da == 0x9c)
		key=POWER;
	else if(da == 0xec)
		key=UP;
	else if(da == 0xac)
		key=DOWN;
	else if(da == 0xfc)
		key=ADD;
	else if(da == 0xbc)
		key=SUB;
	else if(da == 0xe4)
		key=MENU;
	else if(da == 0xac)
		key=M_UP;
	else if(da == 0xbc)	//与ADD,sub重合了//
		key=M_DOWN;
	else if(da == 0xfc)
		key=M_LEFT;
	else if(da == 0x5A)
		key=M_RIGHT;
	else if(da == 0xd4)
		key=SILENCE;
	else if(da == 0x94)
		key=SCREEN;
}