intfun.c

单片机8052下红外线接收例子

/*********************************************************************************************************
**
**                                  (c) Copyright 2004-2006
**                                    All Rights Reserved
**
**
**                                    版权所有：朗顿科技
**                                   http://www.ldmcu.com
**
********************************************************************************************************/

#include <Gendef.h>
#include <Val.h>
#include <stdio.h>
#include<intrins.h>

void ErrRst(void)
{
	EX0 = TRUE;
	ET0 = FALSE;
	TR0 = FALSE;
		
	RecTem = 0;
	RecBitCoun = 0;
	RecBytCoun = 0;
	
	RecStart = FALSE;
	Recend = FALSE;
	DatRecFlag = FALSE;
	Status = RECRET0;
}

void Ex0Int(void) interrupt 0 using 1
{

//	P1 = ~Status;

	if(Status == RECRET0){
		
		EX0 = FALSE;
		ET0 = TRUE;
		
		Status = RECRET1;

		TR0 = FALSE;
		TH0 = TimRefTH[Status];
		TL0 = TimRefTL[Status];
		TR0 = TRUE;

	}else if (Status == RECRET4){
	
		Status++;
		RecTem = 0x00;
		RecBitCoun = 0x00;
		RecBytCoun = 0x00;
		RecStart = TRUE;
		Recend = FALSE;
		DatRecFlag = FALSE;

		TR0 = FALSE;
		TH0 = TimRefTH[Status];
		TL0 = TimRefTL[Status];
		TR0 = TRUE;	
		
	}else if(RecStart == TRUE){

		{
			INT16U RecReg;

			RecReg = ((TH0<<8) & 0xFF00) | (TL0 & 0xFF);
			RecTem >>= 1;
			if((RecReg > ZERLOWLMT) && (RecReg < ZERHGHLMT)){				
				RecTem &= 0x7F;
			}else if((RecReg > ONELOWLMT) && (RecReg < ONEHGHLMT)){	
				RecTem |= 0x80;
			}else{
				ErrRst();

				TI = 0;
				SBUF = 'A';
				while(TI == 0);
				TI = 1;

				TI = 0;
				SBUF = (RecReg >> 8) & 0xFF;
				while(TI == 0);
				TI = 1;
				
				TI = 0;
				SBUF = RecReg & 0xFF;
				while(TI == 0);
				TI = 1;

			}
					
			if(++RecBitCoun >= 8){
				RecBitCoun = 0;
				DatRecBuff[RecBytCoun++] = RecTem;

			}
			if(RecBytCoun >= 4){

//				EX0 = TRUE;
				TR0 = FALSE;
				ET0 = FALSE;
			
				RecTem = 0;
				RecBitCoun = 0;
				RecBytCoun = 0;
				
				RecStart = FALSE;
				Recend = TRUE;
				DatRecFlag = TRUE;
				Status = RECRET0;	

//				P1 = 0x0F;

				{
					
					EX0 = FALSE;
					EA = FALSE;

					IrdaS = 1;
					while(IrdaS == 0);

					
					IrdaS = 1;
					while(IrdaS == 0);

					EX0 = TRUE;
					EA = TRUE;
					
				}
				
			}
		}

		if((Recend == FALSE)&&(Status == RECRET5)){
			TR0 = FALSE;
			TH0 = TimRefTH[Status];
			TL0 = TimRefTL[Status];
			TR0 = TRUE;
		}

	}else{
	
		ErrRst();
	
	}
}

void Tim0Int(void) interrupt 1 using 1
{
	Status++;

//	P1 = ~Status;

	if(1 == Status)
	{
//		P1 = ~0xAF;
		while(1);
	}

	if(RecStart == TRUE)
	{
	
		ErrRst();
		
	}else{

		if((Status == RECRET2)||(Status == RECRET3)){
			
			if(IrdaS == 1){

				ErrRst();

			}
		}

		if(Status == RECRET4){

			if(IrdaS == 0){
				ErrRst();

			}else{
				ET0 = TRUE;
				EX0 = TRUE;
			}
		}

		if(Status != RECRET0)
		{
			TR0 = FALSE;
			TH0 = TimRefTH[Status];
			TL0 = TimRefTL[Status];
			TR0 = TRUE;
		}

	}
}