devtuner.c

主要用于液晶电视解码,内置51单片机,全部代码用C编写,编译环境为KEILC

/******************************************************************************
 Copyright (c) 2005 MStar Semiconductor, Inc.
 All rights reserved.

 [Module Name]: DevTuner.c
 [Date]:        30-JUN-2004
 [Comment]:
   TV tuner subroutines.
 [Reversion History]:
*******************************************************************************/

#define _DEVTUNER_C_
#include "types.h"
#include "global.h"

#if TV_ENABLE
#include "DevTuner.h"
#include "i2c.h"
#include "misc.h"
#include "DEBUG.h"
#include "tv.h"
#include "devvd.h"
#include "msVD.h"
#include "panel.h"
#include "mstar.h"

///////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////
void DevTunerWrite(WORD wFreq)
{
#if (TUNER_TYPE==TUNER_XUGUANG_VFT_5A_118)
	BYTE controltemp;
#endif
    g_bTunerParm.ProgDivide = wFreq+(WORD)(TN_FREQ_IF*1000)/TN_FREQ_SS;

    if( wFreq < TN_LOWBAND_END )               // low bank
        g_bTunerParm.ControlInfo2 = TN_LOW_BAND;
    else if( wFreq <  TN_MIDBAND_END)       // middle band
        g_bTunerParm.ControlInfo2 = TN_MID_BAND;
    else
        g_bTunerParm.ControlInfo2 = TN_HIGH_BAND;

    //printf("\r\nwFreq = %x", wFreq);
    //printf("\r\ng_TuneFreqIF = %x", g_TuneFreqIF);
#if (TUNER_TYPE==TUNER_XUGUANG_VFT_5A_118)
    controltemp=g_bTunerParm->ControlInfo2;
    controltemp&=0x3F;

	switch((chData.ucChannelMisc&SoundSysMask)%TV_SOUND_NUMS)
		{
        case TV_SOUND_BG:
	        controltemp|=0x80;
            break;
        case TV_SOUND_I:
            controltemp|=0x40;
            break;
        case TV_SOUND_M:
        case TV_SOUND_DK:
        default:
            controltemp|=0xC0;
            break;
		}
    g_bTunerParm.ControlInfo2=controltemp;
#endif

    i2c_AccessStart(TN_PROG_I2C_ADDR, I2C_WRITE);
    i2c_SendByte(g_bTunerParm.ProgDivide>>8);
    Delay1ms(1);
    i2c_SendByte(g_bTunerParm.ProgDivide&0xff);
    Delay1ms(1);
    i2c_SendByte(TN_CTL_BYTE);
    Delay1ms(1);
    i2c_SendByte(g_bTunerParm.ControlInfo2);
    Delay1ms(1);
    i2c_Stop();
}


#if TUNER_2IN1
///////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////
void devTunerSetChromaToPal(void)
{
  i2cWriteByte(TN_IF_I2C_ADDR,TN_SWITCHING_SUBADDR,SwitchDataPAL);//0xd6);
  i2cWriteByte(TN_IF_I2C_ADDR,TN_ADJUST_SUBADDR,AdjustDataPAL|g_VideoSetting.TunerAGC);//0x70);
}


void devTunerSetChromaToNtsc(void)
{
  i2cWriteByte(TN_IF_I2C_ADDR,TN_SWITCHING_SUBADDR,SwitchDataNTSC);//0x16);
  i2cWriteByte(TN_IF_I2C_ADDR,TN_ADJUST_SUBADDR,AdjustDataNTSC|g_VideoSetting.TunerAGC);//0x30);
}

void devTunerSetChromaToSECAM(void)
{
  i2cWriteByte(TN_IF_I2C_ADDR,TN_SWITCHING_SUBADDR,SwitchDataSECAM);//0x16);
  i2cWriteByte(TN_IF_I2C_ADDR,TN_ADJUST_SUBADDR,AdjustDataSECAM|g_VideoSetting.TunerAGC);//0x30);
}

BYTE devTunerGetStatus(BYTE ucLoopCount)
{
    BYTE ucStatus; // tuner status
    BYTE AfcWinCounter=0;

    while(ucLoopCount--) // loop to detect
    {
         i2cBurstCurrentBytes(TN_IF_I2C_ADDR,&ucStatus,1);

        if (ucStatus & TN_READ_AFCWIN) // check inside AFC Window
            AfcWinCounter++;

        if(AfcWinCounter>ucLoopCount/2)
            break;

        Delay1ms(1);
    }

    return ucStatus;
}

void devTunerSetSoundToPalBG(void)
{//devTunerSetChromaToPal();
  i2cWriteByte(TN_IF_I2C_ADDR,TN_DATA_SUBADDR,SoundPALBG);
}

void devTunerSetSoundToPalI(void)
{//devTunerSetChromaToPal();
  i2cWriteByte(TN_IF_I2C_ADDR,TN_DATA_SUBADDR,SoundPALI);
}

void devTunerSetSoundToPalDK(void)
{//devTunerSetChromaToPal();
  i2cWriteByte(TN_IF_I2C_ADDR,TN_DATA_SUBADDR,SoundPALDK);
}

void devTunerSetSoundToNTSCMN(void)
{//devTunerSetChromaToNtsc();
  i2cWriteByte(TN_IF_I2C_ADDR,TN_DATA_SUBADDR,SoundNTSC);
}

void devTunerSetSoundToSECAML(void)
{//devTunerSetChromaToSECAM();
  i2cWriteByte(TN_IF_I2C_ADDR,TN_DATA_SUBADDR,SoundSECAML);
}


void devTunerSetAGCValue(value)
{
    BYTE uctemp;
    if (chData.ucChannelMisc==TV_SOUND_M)
	    uctemp=AdjustDataNTSC;
    else
	    uctemp=AdjustDataPAL;

	uctemp&=0xE0;
    i2cWriteByte(TN_IF_I2C_ADDR,TN_ADJUST_SUBADDR,uctemp|value);
}


#else
///////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////
void devTunerSetSoundToPalBG(void)
{
    BYTE tempvalue;
    tempvalue=P4;
    tempvalue&=0xFC;
    tempvalue|=0x03;
    P4=tempvalue;
}

void devTunerSetSoundToPalI(void)
{
    BYTE tempvalue;
    tempvalue=P4;
    tempvalue&=0xFC;
    tempvalue|=0x02;
    P4=tempvalue;
}

void devTunerSetSoundToPalDK(void)
{
    BYTE tempvalue;
    tempvalue=P4;
    tempvalue&=0xFC;
    tempvalue|=0x01;
    P4=tempvalue;
}

void devTunerSetSoundToNTSCMN(void)
{
    P4&=0xFC;
}

#endif //TUNER_2IN1

///////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////

#define SlopeCount		1

BYTE devTunerAutoTuneFreq( WORD wOriFreq, WORD* pwResultFreq )
{
    TnAutoDrctType cDirect; // +/- direct
    char cOffset; // frequency offset
    BYTE ucDummy; // loop dummy
    BYTE ucBestAfc; // found best freq. flag
    BYTE ucAbidanceCount;//identify personate channel

    *pwResultFreq = wOriFreq; // intialize
    cDirect = TN_AUTO_TGL;
    cOffset = 0;
    ucDummy = TN_SCAN_STEP+5; // initialize dummy
    ucBestAfc = 0x07; // initialize AFC
    ucAbidanceCount=0;

    do
    {
        BYTE ucStatus; // status buffer
        BYTE ucAFC; // AFC status
        BYTE ucAfcDelta;
    	 BYTE ucLastAfc;
        DevTunerWrite( wOriFreq + cOffset); // setting parameteer
        DrawScanProgress(wOriFreq + cOffset); //2006-8-21
        //Delay1ms(30);
        //SystemDelay_translate_To_Dsp_Processor(2);
        ucStatus = devTunerGetStatus(10);
        if((ucStatus & TN_READ_AFCWIN) == 0x00) // No signal
            return TN_SCAN_ERR;

	    ucLastAfc=ucAFC;
        ucAFC = (ucStatus & TN_READ_AFC) >> 1; // b4-b1
        if (ucAFC < 0x08) // 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07
            ucAfcDelta = ucAFC;
        else //if(ucAFC >= 0x08) // 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d 0x0e, 0x0f
            ucAfcDelta = ucAFC ^ 0x0f;

        if (ucBestAfc > ucAfcDelta) // found better AFC
        {
            ucBestAfc = ucAfcDelta;
            *pwResultFreq = wOriFreq + cOffset; // save freq.
        }

        // Setup the direction of search
        if (cDirect == TN_AUTO_TGL)
        {
		    if( ucAFC < 0x08 ) // 0x03, 0x04, 0x05, 0x06, 0x07
                cDirect = TN_AUTO_PLS; // increase
            else // 0x08, 0x09, 0x0a, 0x0b, 0x0c
                cDirect = TN_AUTO_MNS; // decrease
        }
        if (cDirect == TN_AUTO_PLS) // increase
        {
            if( ucAFC >= 0x08 ) // over -
            {
                if (ucBestAfc <= 0x02) // 0x00, 0x01, 0x02 or  0x0d 0x0e, 0x0f
                {
                    if(ucAbidanceCount>SlopeCount)//||ucBestAfc == 0x00)
				        goto succeed;
			        else
    				{
    					if(ucLastAfc>ucAFC)
    						ucAbidanceCount++;
    					else
    						ucAbidanceCount=0;
    				}
                }
            }
            cOffset++;
        }
        if (cDirect == TN_AUTO_MNS) // decrease
        {
            if( ucAFC < 0x08 ) // over +
            {
                if (ucBestAfc <= 0x02) // 0x00, 0x01, 0x02 or  0x0d 0x0e, 0x0f
                {
                    if(ucAbidanceCount>SlopeCount)//||ucBestAfc == 0x00)
    				    goto succeed;
    			    else
    				{
    					if(ucLastAfc<ucAFC)
    						ucAbidanceCount++;
    					else
    						ucAbidanceCount=0;
    				}
                }
            }
            cOffset--;
        }
    } while(ucDummy--);

    return TN_SCAN_ERR;

succeed:
    DevTunerWrite( *pwResultFreq+STEPS_1M*2);
    SystemDelay_translate_To_Dsp_Processor(1);
    DevTunerWrite( *pwResultFreq); // setting parameteer
    SystemDelay_translate_To_Dsp_Processor(1);
    msVDReset();
    SystemDelay_translate_To_Dsp_Processor(1);
    if (!(msVDGetSyncStable(10,20)))
    	return TN_SCAN_ERR;

    g_bSaveChannel = TRUE;
        return TRUE; // find Channel
}

void devSetSWF(BYTE ColorSoundSystem)
{
    BYTE tempchroamvalue;
    BYTE tempsoundvalue;
    tempchroamvalue=(((g_TVChSetting.TvCurChannelMisc&ColorSysMask)>>4)%CHROMA_NUMS);
    tempsoundvalue=((ColorSoundSystem&SoundSysMask)%TV_SOUND_NUMS);
#if TV_SYSTEM==TV_NTSC
    tempchroamvalue=CHROMA_NTSC;
    ColorSoundSystem=TV_SOUND_M;
#endif
	switch(tempchroamvalue)
	{
	    case CHROMA_PAL:
            if (tempsoundvalue==TV_SOUND_M||tempsoundvalue==TV_SOUND_N)
                {
                devTunerSetChromaToNtsc();
                }
            else
                {
                devTunerSetChromaToPal();
                }
		    break;
	    case CHROMA_NTSC:
                devTunerSetChromaToNtsc();
		    break;
	    case CHROMA_SECAM:
                devTunerSetChromaToPal();
		    break;
	    case CHROMA_AUTO:
	    default:
                devTunerSetChromaToPal();
		    break;
    }

	switch(tempsoundvalue)
    {
        case TV_SOUND_BG:
            devTunerSetSoundToPalBG();
            break;
        case TV_SOUND_I:
		    devTunerSetSoundToPalI();
	        break;
        case TV_SOUND_M:
        case TV_SOUND_N:
            if(tempchroamvalue==CHROMA_AUTO||tempchroamvalue==CHROMA_NTSC)
                devTunerSetChromaToNtsc();
            devTunerSetSoundToNTSCMN();
            break;
        case TV_SOUND_L:
            if(tempchroamvalue==CHROMA_AUTO||tempchroamvalue==CHROMA_SECAM)
             devTunerSetChromaToSECAM();
            devTunerSetSoundToSECAML();
            break;
        default:
        case TV_SOUND_DK:
            devTunerSetSoundToPalDK();
            break;
    }
}

#endif