📄 tuner.c
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/*
****************************************************************************
Copyright 2001 Philips Semiconductors Limited,
35/F,Panglin Plaza, No. 2002,Jia BIn Road,Luo Hu District,Shenzhen 518001, PRC.
All rights are reserved. Reproduction in whole or in part is prohibited
without the prior written consent of the copyright owner.
COMPANY CONFIDENTIAL
***************************************************************************
Filename : Tuner.c
Rev Date Author
____________________________________________________________________________
1.0 2002/01/13 Tenon Mao
TEA5767 basic control
*/
#define XTAL32K
#define LowestFM 87500 //87.5MHz for EUR only for USA 87.9M
#define HighestFM 108000 //108.Mhz
#define InitVCO 98000 // 98.00 MHz for reset Freq
#define STEP 100 //setp size =100KHz.
#define AST_STEP 200 //200
#define MAX_STATION 20
#define TUNER_DELAY 250000 //250MS
#ifdef XTAL32K
#define REFERENCE_FREQ 32.768
#else
#define REFERENCE_FREQ 50.000
#endif
/**********************
* INCLUDE FILES *
**********************/
/* Standard include files */
/* Project include files */
#include "global.h"
#include "tuner.h"
#include "util.h"
#include "lcd.h"
#include "key.h"
/**********************
* LOCAL TYPEDEFS *
**********************/
/**********************
* EXPORTED DATA *
**********************/
BYTE data SearchLevel=3;
BYTE idata WriteDataWord[5]; // write tea5767H dataword
BYTE idata ReadDataWord[5]; // read tea5767H dataword
unsigned long idata TunerStation[20]; //save radio station FM Value HEX format
///For assembly data
BIT data FlagMute = False; // flag to Mute R&L
BIT data FlagSearch = False; // flag to search or preset mode
BIT data FlagSearchtUp =True; // flag for search direction
BYTE data FlagLevel =2; // flag for current search level
BIT data FlagHighInjection=False;
BIT data FlagMono = False; // flag to force mono
//Mute L
//Mute R
//SWPORT1 for GPIO out
BIT data FlagSWPORT2=Low; // flag for level of pin15
//standy_by
//Japan or ther area
//XTAL selecton 1 for 32k
BIT data FlagSoftMute = True;//False; // flag to force mono
//HCC
//SNC
BIT data FlagSWPORT1=True; // 1= confige as indication of found!!
//PLL selection 0
//Deem 1.
BYTE data NowStation=0;
BYTE data Max_Station=0;
unsigned long gdwSearchedVCO; // vco frequency after search command
unsigned long gdwPresetVCO=89800; // target vco frequency for Preset
unsigned long gdwWorkingVCO; // displayed vco frequency
BIT data NotFound = True;
BIT data BandLimit = False; // Indicate the end of band
//unsigned char TunerSearchTimer; //Timeout for serach
/**********************
* STATIC DATA *
**********************/
/**********************
* LOCAL MACROS *
**********************/
/**********************
* FUNCTION PROTOTYPES *
**********************/
/****************************************************************************/
/* Command Delay */
/****************************************************************************/
void CMD_Delay(BYTE i)
{
for (; i!=0; i--) ;
}
void CMD_CheckHighSCL()
{
I2cSCL = 1;
}
void CMD_SendStart()
{
I2cSCL = 1;
CMD_Delay(CMD_DELAY);
I2cSDA = 0;
CMD_Delay(CMD_DELAY);
I2cSCL = 0;
CMD_Delay(CMD_DELAY);
}
void CMD_SendStop()
{
I2cSDA = 0;
CMD_CheckHighSCL();
CMD_Delay(CMD_DELAY);
I2cSDA = 1;
CMD_Delay(CMD_DELAY);
}
BYTE CMD_SendByte(BYTE bByte)
{
BYTE i;
BIT Acknowledge=1;
for(i=0;i<8;i++)
{
if(bByte&0x80)
I2cSDA=1;
else
I2cSDA=0;
bByte<<=1;
CMD_Delay(CMD_DELAY);
CMD_CheckHighSCL();
I2cSCL =0;
}
I2cSDA=1;
I2cSCL=1;
CMD_Delay(CMD_DELAY);
if (I2cSDA) Acknowledge=0;
I2cSCL=0;
CMD_Delay(CMD_DELAY);
return Acknowledge;
}
BYTE CMD_GetByte(BYTE Acknowledge)
{
BYTE i,bByte=0, bMask=0x80;
for(i=0;i<8;i++)
{
CMD_Delay(CMD_DELAY);
I2cSCL=1;
if(I2cSDA)bByte|=bMask;
bMask >>= 1;
I2cSCL =0;
}
I2cSDA =(Acknowledge)?1:0;
CMD_CheckHighSCL();
CMD_Delay(CMD_DELAY);
I2cSCL =0;
I2cSDA =1;
CMD_Delay(CMD_DELAY);
return bByte;
}
//////////////////////////////////////////////
void WriteSTR()
{
BYTE i;
EA=0;
CMD_SendStart();
if (CMD_SendByte(0x0c0)) //chip addr of write data to driver
{
for (i=0; i<5; i++)
{
if (!CMD_SendByte(WriteDataWord[i])) //0 err
{
break;
}
}
}
CMD_SendStop(); //???
EA=1;
CMD_Delay(CMD_DELAY);
CMD_Delay(CMD_DELAY);
}
Byte SearchRead1=0; //for test only!!!
Byte SearchRead2=0;
Byte SearchRead3=0;
Byte SearchRead4=0;
Byte SearchRead5=0;
void ReadSTR() //get datd../
{
BYTE i;
#if 1 //test only!!
for (i=0; i<=4; i++)
{
ReadDataWord[i]=0; //init the read buffer.
}
SearchRead1=ReadDataWord[0]; //byte 0 --4 .byte 0 first.
SearchRead2=ReadDataWord[1]; //byte 0 --4 .byte 0 first.
SearchRead3=ReadDataWord[2]; //byte 0 --4 .byte 0 first.
SearchRead4=ReadDataWord[3]; //byte 0 --4 .byte 0 first.
SearchRead5=ReadDataWord[4]; //byte 0 --4 .byte 0 first.
Delay10us(2);
#endif
CMD_SendStart();
if (CMD_SendByte(0x0c1)) //chip addr of read data
{
for (i=0;i<5;i++)
ReadDataWord[i] =(i==4)? CMD_GetByte(1):CMD_GetByte(0); //the last byte with ACK.
CMD_SendStop();
}
else CMD_SendStop();
#if 1 //test only!!
SearchRead1=ReadDataWord[0]; //byte 0 --4 .byte 0 first.
SearchRead2=ReadDataWord[1]; //byte 0 --4 .byte 0 first.
SearchRead3=ReadDataWord[2]; //byte 0 --4 .byte 0 first.
SearchRead4=ReadDataWord[3]; //byte 0 --4 .byte 0 first.
SearchRead5=ReadDataWord[4]; //byte 0 --4 .byte 0 first.
Delay10us(2);
#endif
}
/*********************************************************
* NAME : SearchOver
* CHK if the search Finished accoding the SWPORT1
*
* Returns : none
*
* Parameter Description
* --------------------------------------------------------
* none
*
* Externals Usage
* --------------------------------------------------------
*
*
* Additional information:
* Local subfunction
*********************************************************/
BYTE data LowCount=0; //for test only
static BIT SearchOver(void)
{
LowCount++;
return(SWPORT1) ; //PIN from low to high. Then tuning over
}
/*********************************************************
* NAME : TuneOver
* CHK if the PreeSet or search Finished according
* the read byte1.7
*
*
* Returns : none
*
* Parameter Description
* --------------------------------------------------------
* none
*
* Externals Usage
* --------------------------------------------------------
*
*
* Additional information:
* Local subfunction
*********************************************************/
BYTE tbRead1;
BYTE tbRead2;
BIT Stereo=False;
BIT Ready=False;
static void TuneOver(void)
{
BIT Ready=False;
ReadSTR(); //how about continue read???? mao 0227
tbRead1=ReadDataWord[0];
tbRead2=ReadDataWord[2];
LowCount++; //for test only.
if((tbRead1&0x40) != 0) BandLimit=True; //limited
else BandLimit=False;
if((tbRead2&0x80) != 0) Stereo=True;
else Stereo=False;
tbRead1=ReadDataWord[0];
if((tbRead1&0x80) != 0) Ready=True; //Found
else Ready=False;
}
/*********************************************************
* NAME : AssembleFrequencyWord
* given a VCO frequency calculate and load the frequency databitsr
* and save the PLL Fre to DataWord[37-24] =14 bits
* 5757 have 15 bits and the bits location is different!
* Returns : none
*
* Parameter Description
* --------------------------------------------------------
* none
*
* Externals Usage
* --------------------------------------------------------
* WriteDataWord[37-24] the bits will be Set according cal result(out)
* gdwPresetVCO in
*
* Additional information:
* Local subfunction
* All the Frequency unit is KHz.!
* Test it is ok 02/26
*********************************************************/
static void AssembleFrequencyWord(void)
{
UINT16 twPLL =0; //Dec
UINT32 tdwPresetVCO =gdwPresetVCO; //Khz
BYTE tbTmp1;
BYTE tbTmp2;
// calcu1ate frequency dataword bits from given station frequency BCD:
if(FlagHighInjection)
{
twPLL =(unsigned int)((float)((tdwPresetVCO +225)*4)/(float)REFERENCE_FREQ);
}
else
{
twPLL =(unsigned int)((float)((tdwPresetVCO -225)*4)/(float)REFERENCE_FREQ);
}
//convert BCD to Hex.
tbTmp1 =(unsigned char)(twPLL%256); //6789=Hex1A85 -->133=Hex85
tbTmp2 =(unsigned char)(twPLL/256); // -->26=Hex1A
WriteDataWord[0]=tbTmp2; //high block
WriteDataWord[1]=tbTmp1;
}
/*********************************************************
* NAME : DisAssembleFrequencyWord
* given a frequency dataword and waveband,
* calculate the VCO frequency
* Get the PLL Freq BITs from DataWord[37-24] =14 bits
* 5757 have 15 bits and the bits location is different!
* Returns : none
*
* Parameter Description
* --------------------------------------------------------
* none
*
* Externals Usage
* --------------------------------------------------------
* ReadDataWord[37-24] the bits will be taken(in)
* //gdwSearchedVCO the Freq (out)
*
* Additional information:
* Local subfunction
* Tested, It is Ok. 02/26
*********************************************************/
void DisAssembleFrequencyWord(void)
{
UINT16 twPLL =0; //Dec
UINT32 tdwPresetVCO =gdwPresetVCO; //Khz
BYTE tbTmp1=ReadDataWord[1];
BYTE tbTmp2=ReadDataWord[0];
tbTmp2&=0x3f;
twPLL=tbTmp2*256+tbTmp1;
// calculate searched station frequency from dataword bits
if(FlagHighInjection)
gdwSearchedVCO =(unsigned long)((float)twPLL*(float)REFERENCE_FREQ*(float)0.25-225);
else
gdwSearchedVCO =(unsigned long)((float)twPLL*(float)REFERENCE_FREQ*(float)0.25+225);
}
/*********************************************************
* NAME : AssembleData
* assemble a full data word based on global variables
*
* Returns : none
*
* Parameter Description
* --------------------------------------------------------
* none
*
* Externals Usage
* --------------------------------------------------------
* DataWord[39-0] the bits will be Set(out)
* The global Variable in as below list!!
*
* FlagSearch in, if search or preSet mode? StartSearch [38]
* FlagLevel in search stop level [21,22]
* FalgMono in.
* FlagSWPORT2 in
* FlagSearchtUp in
* gdwPresetVCO in
*
* WriteDataWord[] out.
*
* Additional information:
* Local subfunction
* Tested, It is Ok. 4/16
*********************************************************/
BYTE Write1;
static void AssembleData(void)
{
WriteDataWord[3] = 0x11; //32k /p1 found.
WriteDataWord[4] = 0x40;
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