irint.c

t102 驱动AU 7 屏的OSD原代码,我找了好久才找到的,有一定的参考价值.

//#ifdef INTERRUPT1
#include "reg51.h"
#include "Common.h"
#include "Remote.h"
#include "struct.h"
#include "system.h"
#include "KEYPAD.H"
#include "OSDDraw.h"
#include "TwoWire.h"
#include "intrins.h"


extern bit 	ir_enable;
extern uCHAR 	ir_data;
//extern uWORD count1;
uCHAR ir_repeat;
bit Filter13(bit le)
{
	bit r;
	r=INT1;
	if(le==1)
	{
		_nop_();
		_nop_();
		_nop_();
		r&=INT1;
		_nop_();
		_nop_();
		_nop_();
		r&=INT1;
	}
	else
	{
		_nop_();
		_nop_();
		_nop_();
		r|=INT1;
		_nop_();
		_nop_();
		_nop_();
		r|=INT1;
	}
	if(r==le)
		return 1;
	else
		return 0;
}
/*遥控接收在此中断程序内完成
  数据放在ir_data内*/
/************************************/
/*  Interrupt for IR subroutine     */
/*  external interrupt source INT0  */
/************************************/
void int1Remote(void) interrupt 2
{
	register BYTE i;
	unsigned int count;		/*计时变量*/
	unsigned int  temp0,temp1,ir_code=0;
	ir_enable=TRUE;
	TMOD=0x11;             /*timer 0 operate in 16 bit mode*/
	EX1=0;
	TL0=0;
	TH0=0;
	TR0=1;
	/************************************/
	/*   Detect IR Head                 */
	/************************************/
	do                /*Detect IR head 9mS*/
	{
		count=(TL0+TH0*256);   /*count :us unit */
		if(Filter13(1)==1) break;
	}while(count<=(IR_HEAD+DELTA));
	TR0=0;			/*停止计时*/

	if(Filter13(0)==1||count<(IR_HEAD-DELTA*25))       /*for some noise disturb IR*/
		{
		ir_enable=FALSE; /* no IR head or not suitable for Ir head*/
		EX1=1;
		TR0=1;
		return;
		}
	/************************************/
	/*   Detect OFF CODE     4.5mS      */
	/************************************/
	while(Filter13(0)==1);
	TR0=0;
	TL0=0;
	TH0=0;
	TR0=1;
	do                /*Detect IR OFF CODE*/
	{
		count=(TL0+TH0*256);   /*count :us unit */
		if(Filter13(0)==1) break;
	}while(count<(OFF_CODE+DELTA));
	TR0=0;
	count=(TL0+TH0*256);   /*count :us unit */
	if(count<=(OFF_CODE-DELTA*2))
	{
		/*重复码OFF=2.25*/
		if((count>(OFF_REP-DELTA)&&count<(OFF_REP+DELTA)))
		{
			TR0=0;
			TL0=0;
			TH0=0;
			TR0=1;
			do
			{
				count=(TL0+TH0*256);   /*count :us unit */
				if(Filter13(1)==1) break;
			}while(count<=(REP_CODE+DELTA));
			TR0=0;
			count=(TL0+TH0*256);   /*count :us unit */
			if(INT1==1)
			{
				TR0=0;
				if(
				ir_data==REMOTE_KEY_DECR||ir_data==REMOTE_KEY_INCR)
				{
				ir_enable=TRUE;	/*注意：ir_data不变*/
				EX1=0;
				}
				else
				{
				ir_data=0;
				ir_enable=FALSE;
				EX1=1;
				TR0=1;
				}
				return;
			}
		}
		else
		{
			ir_enable=FALSE;   /*not suitable for off code*/
			EX1=1;
			TR0=1;
			return;
		}
	}
	/************************************/
	/*   Detect 16 bit address code     */
	/************************************/
	if(ir_enable==TRUE)
	{
		TMOD=0x11;           /*counter start with INT0 and TR0*/
		ir_code=0;		/*初始化变量*/
		for(i=0;i<16;i++)
		{
			while(INT1==0);
			TL0=0;
			TH0=0;
			TR0=1;
			do
			{
				count=(TL0+TH0*256);   /*count :us unit */
				if(Filter13(0)==1) break;
			}while(count<=(CODE_1_TIME+DELTA));	/*INT0为高电平时计时*/
			TR0=0;
			ir_code<<=1;
			if((count>(CODE_1_TIME-DELTA))&&(count<=(CODE_1_TIME+DELTA)))  /*detect 1 code  2.24mS-0.56mS=1.68mS*/
				ir_code++;
			else if((count>(CODE_0_TIME-DELTA))&&(count<=(CODE_0_TIME+DELTA)));  /*detect 0 code 1.12mS-0.56mS=0.56mS*/
			else
			{
			 	ir_enable=FALSE;
				TR0=1;
				break;           /*not suitable for address code */
			}
		}                /*end for*/
	}
	/************************************/
	/*   Detect 16 bit data code        */
	/************************************/
	if(ir_enable==TRUE&&ir_code==IR_SYSTEM_CODE)/**/
	{
		TMOD=0x11;           /*counter start with INT0 and TR0*/
		ir_code=0;
		for(i=0;i<16;i++)
		{
			while(INT1==0);
			TL0=0;
			TH0=0;
			TR0=1;
			do
			{
				count=(TL0+TH0*256);
				if(Filter13(0)==1) break;
			}while(count<=(CODE_1_TIME+DELTA));	/*INT0为高电平时计时*/
			TR0=0;
			//count=(TL0+TH0*256);   /*count :us unit */
			ir_code<<=1;
			if((count>(CODE_1_TIME-DELTA))&&(count<=(CODE_1_TIME+DELTA)))  /*detect 1 code 1.68mS*/
				ir_code++;
			else if((count>(CODE_0_TIME-DELTA)&&count<=(CODE_0_TIME+DELTA)));  /*detect 0 code 0.56mS*/
			else
			{
				ir_enable=FALSE;
				TR0=1;
				break;           /*not suitable for address code */
			}
		}                /*end for*/
		if(ir_enable==TRUE)
		{
			temp0=ir_code&0xff00;
			temp0=~temp0;
			temp0>>=8;
			temp1=ir_code&0x00ff;
			if(temp0!=temp1)
				ir_enable=FALSE;
			else
			{
				ir_data=(BYTE)(temp1);     /*true code effective*/
				ir_enable=TRUE;            /*set ir flag*/
				EX1=0;
				return;
			}
		}
	}
	else
	{	ir_enable=FALSE;
	EX1=1;}
}

void RemoteEvent(void)
{
	bit bTemp=0;
	switch(ir_data){
		case REMOTE_KEY_POWER:  bTemp=kyPOWEREvent();		break;
		case REMOTE_KEY_SOURCE: IRSourceSelKeyCtrl();		break;
		case REMOTE_KEY_DISPLAY:IRNTSC_PALCtrl();		break;
		case REMOTE_KEY_DECR:	bTemp=kyDECREASEEvent();	break;
		case REMOTE_KEY_INCR:	bTemp=kyINCREASEEvent();	break;
//Ruby 2004-06-07		case REMOTE_KEY_OK:		OSDExit();	break;
		case REMOTE_KEY_MENU:   bTemp=kyMENUEvent();		break;
        	case REMOTE_KEY_SCALER : kySCALEREvent();   		break;
		case REMOTE_KEY_VO_INC:	kySCALEREvent(); 		break;//bTemp=IRVolUpKeyCtrl();	 break;
		case REMOTE_KEY_VO_DEC:	bTemp=IRVolDownKeyCtrl(); 	break;	
		case REMOTE_KEY_DEC_P:	bTemp=IRDownKeyCtrl();		break;
		case REMOTE_KEY_INC_P:	bTemp=IRUpKeyCtrl();		break;
#ifdef ROTATE		
		case REMOTE_KEY_AIRCABLE: kyDismodeEvent();		break;
#endif			
#ifdef TV
//  	case REMOTE_KEY_MUTE:	bTemp=IRSetupKeyCtrl(); break;
//		case REMOTE_KEY_DEC_P:	bTemp=IRDownKeyCtrl();	break;
//		case REMOTE_KEY_INC_P:	bTemp=IRUpKeyCtrl();break;
		case REMOTE_KEY_NUM0:	IRNumKeyCtrl(0);	break;
		case REMOTE_KEY_NUM1:	IRNumKeyCtrl(1);	break;
		case REMOTE_KEY_NUM2:	IRNumKeyCtrl(2);	break;
		case REMOTE_KEY_NUM3:	IRNumKeyCtrl(3);	break;
		case REMOTE_KEY_NUM4:	IRNumKeyCtrl(4);	break;
		case REMOTE_KEY_NUM5:	IRNumKeyCtrl(5);	break;
		case REMOTE_KEY_NUM6:	IRNumKeyCtrl(6);	break;
		case REMOTE_KEY_NUM7:	IRNumKeyCtrl(7);	break;
		case REMOTE_KEY_NUM8:	IRNumKeyCtrl(8);	break;
		case REMOTE_KEY_NUM9:	IRNumKeyCtrl(9);	break;
		case REMOTE_KEY_NUM_Bites:	IRNumKeyCtrl(10);	break;
#endif
	}
		if(bTemp)
			OSDEventMgr();
	EX1=1;
}
//#endif