paltuner.c

车载DVD osdIC TW8816原厂代码

			    }
			}
		}
	}

	do{
		SetTVFreq(TVFreqDiv);
		delay(30);	
		val = ReadTuner();
		if ( (val & 0x07) > 2 )  
			TVFreqDiv += amount;
		else if( (val & 0x07) < 2 )  
			TVFreqDiv -= amount;
		else goto true_aft; // == 2 ?

		amount = (amount==1 ? 1 : amount >> 1 );

	  }while( Check_Cnt-- > 0 );
	  goto fail_aft;

	if(((val & 0x07) < 0x03 ) && ((val & 0x07) > 0x01 )) goto true_aft;

fail_aft:
		return FALSE;

true_aft:
		if( IsNoInput() ) return FALSE;
		if(IsVideoInput()){
			TVFreq = TVFreqDiv;	// Get Data.
			return TRUE;
		}
		else return FALSE;

#endif	//TVTunerDevice==LGTUNER_MK5 
//070406-end
}

void SetTVChannel(void)
{
	//WORD TVFreq;
	char Fine;

	//BYTE val;
	//val = ReadDecoder(MISC3);
	//WriteDecoder(MISC3, val|0x08);  // Force to output blue or black Screen
	PanelBlack(1);
	CheckAndClearMuteOn();
	AudioOff();	// to remove Pop Noise.
	delay(5);

	TVFreq = GetTVFreqEE(TVChannel);
	Fine = GetFineTuneEE(TVChannel);// - 31;
	#ifdef DEBUG_TV
	Printf("\rTVFreqDiv:0x%04x",(WORD)Fine);
	#endif
	if( Fine ) SetTVFreq( TVFreq + Fine); // 
	else{
	
		//if( AFT(TVFreq)) ;
		//else 
			SetTVFreq( TVFreq ); // AFT Fail
	}
	
	delay(10);
	
	//SWReset();
	//WriteDecoder(MISC3, val);	// Disable Blue/black Screen
	//WriteDecoder(0x2f, 0x91); // Rewrite Clroma low pass filter data for Noinput color killer problem.
	if(!ChannelEdit_Flag)  DisplayTVChannel(TVChannel,1);		
	SetTVPrEE();
	PanelBlack(0);

	AudioOn();			//SetMSPVol();

}
//=======================  Called from outside ==============================================
void ChangeTVChannel(BYTE NewCh)
{
	TVChManual = 0;

	if( NewCh <= TOTAL_PR )
	{
		TVChannel = DummyChannel = NewCh;
		SetTVChannel();
	}
}

BYTE UpDownTVChannel(BYTE flag)
{
	BYTE i=0, OldTVChannel;
	BYTE MinChannel=START_PR;
	BYTE MaxCount;

	if(!ChannelEdit_Flag)
		ClearOSDInfo();

	MaxCount = TOTAL_PR ;

	OldTVChannel = TVChannel;

	do {
		i++;
		if( i > MaxCount ) 
		{
			TVChannel = DummyChannel = OldTVChannel;
			break;
		}	

		if(flag == UP)	 DummyChannel = ( TVChannel-MinChannel + 1 ) % MaxCount + MinChannel; 
		else  DummyChannel = ( TVChannel - MinChannel + MaxCount - 1) % MaxCount + MinChannel; 
		
		TVChannel = DummyChannel;

		if(ChannelEdit_Flag) break;	

	} while( GetTVPrSystem(TVChannel) & SKIPCHN_MASK);
	
	SetTVChannel();
	return TRUE;
}

// TV Channel Scan..
void ManualTune(BYTE flag)
{
	DWORD TEMP_TVFREQ;
	
	AudioOff();
	
	TEMP_TVFREQ = TVFreq;

	DisplayManualScanTVProg(flag);
	SetTVFreq( TEMP_TVFREQ );

	if( IsVideoInput() ) {
			if( flag == UP ) 	TEMP_TVFREQ += FREQ_INC;
			else 	TEMP_TVFREQ -= FREQ_INC;
	}

	while(1)
	{
			if( WantToStopTVScan() )
			break;

			if( flag == UP ) 	TEMP_TVFREQ += FREQ_INC;
			else 	TEMP_TVFREQ -= FREQ_INC;

			SetTVFreq( TEMP_TVFREQ ); 
			DisplayTVFreq(TEMP_TVFREQ);
		    delay(20);	// Wait for 150mS

			if( IsVideoInput() ) 
				if(AFT(TEMP_TVFREQ)) break;

			if( (TEMP_TVFREQ > MAX_FREQUENCY ) || (TEMP_TVFREQ < MIN_FREQUENCY)) break;
	};

	if( IsAudioMuteOn() )	DisplayMuteInfo();
	else AudioOn();

}

void ScanTVChannel(void)
{
	BYTE i;
	WORD addr;
	WORD TEMP_TVFREQ;

	TVChannel = 0;

	AudioOff();

	//if( Colorsystem == SECAM_L_BAND ) TEMP_TVFREQ = SECAM_L_MIN; 
	//else
	TEMP_TVFREQ = MIN_FREQUENCY;

	DisplayScanChannel(TVChannel);

	for( ; TEMP_TVFREQ < MAX_FREQUENCY; TEMP_TVFREQ += FREQ_INC ) //1Mhz++
	{
		if( WantToStopTVScan() ) break;

		SetTVFreq( TEMP_TVFREQ ); 

		DisplayTVFreq(TEMP_TVFREQ);
		
		delay(15);	// Wait for 150mS

		if( IsVideoInput() ) {
			if(AFT(TEMP_TVFREQ)){
			//TVFreq = TEMP_TVFREQ;	
			TEMP_TVFREQ = TVFreq;	
			TEMP_TVFREQ += FREQ_INC*2;//32++; 2Mhz++
			TVChannel++;

			DisplayScanChannel(TVChannel);

			SetTVFreqEE( TVChannel, TVFreq );
			SetTVPrSystem(TVChannel, 0);	// Not skip
			SetFineTuneEE(TVChannel, 0);	// FineTune = 0

			addr = FIRST_SAVEDPR+TVCHNAME + TVChannel*BYTEPERCHANNEL;	// Channel Name = "-----" (Default)
			for(i=0; i<5; i++, addr++)
				WriteEEP( addr, '-' );
		} 

		if( TVChannel > TOTAL_PR )	break;
			}			

		}//for

	i=TVChannel+1;

	TVChannel = DummyChannel = 1; // First Channel

//070406-start
#if  TVTunerDevice==LGTUNER_MK5 
	ClearScanTV();	// for fast clear scantv osd
#endif	//TVTunerDevice==LGTUNER_MK5 
//070406-end

	SetTVChannel();

	if( IsAudioMuteOn() )	DisplayMuteInfo();
	else AudioOn();

	// Erase remain channel data 
	for( ; i <= TOTAL_PR; i++ ){
		SetTVFreqEE( i, 0x0fff );
		SetTVPrSystem(i, SKIPCHN_MASK);	// skip
		WriteEEP(FIRST_SAVEDPR+TVCHNAME + i*BYTEPERCHANNEL, 0xff);	// First char of the name = 0xff;
		SetFineTuneEE(i, 0);	// FineTune = 0
	}
#ifdef DEBUG
	dPuts("\r\n Channel scan-----Finished"); 
#endif

}

/*
void SaveChannel( BYTE chn )
{
	TVChannel = chn;
	SetTVFreqEE( TVChannel, TVFreq );
	SetTVChannel();
}
*/
CODE struct RegisterInfo OSDFineTuneRange={ -31, 31, 0 };
BYTE GetFineTune(void)
{
	char val;
	int rd;
	val =  GetFineTuneEE(TVChannel) ;
	Mapping1( val, &OSDFineTuneRange, &rd, &UserRange );
	return (BYTE)rd;
}

BYTE ChangeFineChannel(BYTE flag)
{
	int rd;
	char val;
	WORD Freq;

	val = GetFineTuneEE(TVChannel) ;
	Printf("\r\nFine Tune:%d", (WORD)val);

//	if( val & 0x80 )	rd = -(val&0x7f)
	val = ( flag==UP ?  val+1  :  val-1  );		
	if( val < OSDFineTuneRange.Min || val > OSDFineTuneRange.Max )
		return 0; // Retry!!
	Freq = GetTVFreqEE(TVChannel);

	Freq = Freq + val;
	SetTVFreq( Freq );   
	SetFineTuneEE(TVChannel, (BYTE)val);

	Mapping1( val, &OSDFineTuneRange, &rd, &UserRange );
	return (BYTE)rd;
}


void GetFirstChannel(void)
{
	TVChannel = DummyChannel = GetTVPrEE();
	SetTVChannel();
}

BYTE IsSavedCurChn(void)
{                                                                  
	return( ( GetTVPrSystem( TVChannel ) & SKIPCHN_MASK ) ? CLEARED_CHN : SAVED_CHN   );
}
/*
BYTE StoreClearCurChn(void)
{
	BYTE val,cleared;

	val = GetTVPrSystem( TVChannel );
	if( val & SKIPCHN_MASK )	{	val &= ( ~SKIPCHN_MASK );	cleared = SAVED_CHN ;    }
	else						{	val |= SKIPCHN_MASK;	    cleared = CLEARED_CHN ; 	}
	
	SetTVPrSystem( TVChannel, val );
	return cleared;
}
*/
void EditTVChn(BYTE _RemoDataCode)
{
	WORD TempChannel; 
	TempChannel = DummyChannel ;

	if( TVChManual ) {
		TempChannel*= 10;
		TempChannel+= _RemoDataCode;

		if	(TempChannel > TOTAL_PR )
		{			
			while( TempChannel >= 10 )
				TempChannel -= 10;
		}
	}
	else {
		TempChannel = _RemoDataCode;
	}
	
	DummyChannel = TempChannel;
	DisplayTVChannel(DummyChannel, 0);
	TVChManual = 1;		// Request to run channel after timeout.
}

void InitTV(void)
{
//070406-start
#if  TVTunerDevice==LGTUNER_MK5 
	SetTVIFStd(IF_I);
#else	//TVTunerDevice==LGTUNER_MK5 

	MTSType             = MTS_STEREO;

	#ifdef DEBUG_TV
	dPrintf("\r\n++(InitTV) TunerI2CAddress:0x%04x", (WORD)TVTunerI2CAddress);
	#endif

	#if TVTunerDevice==TVAVA
	WriteI2C(0x86, 0x00, 0x30);
	WriteI2C(0x86, 0x01, 0x10);		//Set NTSC audio
	WriteI2C(0x86, 0x02, 0x0c);		//Set NTSC Video
	#endif

#endif	//TVTunerDevice==LGTUNER_MK5 
//070406-end

}

void SetTVIFStd(BYTE cStd)
{
	CODE BYTE PALSECAMTunerSysReg[] = {
										0x56,0x72,0x09,	//for B/G
										0x56,0x72,0x0a,	//for I
										0x56,0x72,0x0b,	//for D/K
										0x46,0x50,0x4b,	//for L
										0xc6,0x50,0x53	//for L'
					};
	MTSType             = MTS_STEREO;

	#ifdef DEBUG_TV
	dPrintf("\r\n++(InitTV) TunerI2CAddress:0x%04x", (WORD)TVTunerI2CAddress);
	#endif

	cStd = GetVInputStdDetectModeEE();
	WriteI2Cn_ExternalDev(TVTunerIFI2CAddress, 0x00, &PALSECAMTunerSysReg[cStd*3], 3);

}

void ResetTVValue(void)
{

}
#endif	//defined( PAL_TV ) && defined(SUPPORT_TV)