tuner.c

收音机模块TEA5767控制程序

}

  


   
/*********************************************************
* 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;                      //for test only
 BYTE tbRead2;
 BYTE tbRead3;
 BYTE tbRead4;

 BIT Stereo=False;
 BIT Ready=False;



   


/*********************************************************
* NAME    : AssembleFrequencyWord
*          given a VCO frequency calculate and load the 
*          frequency databitsr and save the PLL Freq to 
*          DataWord[37-24] =14 bits 
*
* 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;

  if(FlagMute) WriteDataWord[0] |= 0x80;	
  else  WriteDataWord[0] &= 0x7f	;			            //0111 1111

  if (FlagSearch )							 // search mode			
  {                              
    WriteDataWord[0] |= 0x40;               // Set to 1 for search start; other =0.

	// Set the bits of BYTE3 of search 
    if(FlagSearchtUp) WriteDataWord[2] |= 0x80;						
	else  WriteDataWord[2] &= 0x7f;									//0111 1111

  	if ((FlagLevel & 0x02) == 0x02)	WriteDataWord[2] |=0x40 ;	
   	else WriteDataWord[2] &=0x0bf;									//1011 1111	
	
   	if ((FlagLevel & 0x01) == 0x01)	WriteDataWord[2] |=0x20;	
   	else WriteDataWord[2] &=0x0df;									//1101 1111	 
      Write1= WriteDataWord[0]   ;

   
  }
  /////PreSet mode
  else
  {     
      AssembleFrequencyWord();        	  
   	  WriteDataWord[0] &= 0x0bf;            // Set to 0 for Preset mode. 1011,1111
  }
 //set the public data bit of BYTE3 
    if(FlagHighInjection)   WriteDataWord[2] |= 0x10 ;                
   	else  WriteDataWord[2] &= 0x0ef;						//1110 1111

 	if(FlagMono) WriteDataWord[2] |= 0x08	;
	else  WriteDataWord[2] &= 0x0f7	;		            	//1111 0111

 //set the public data bit of BYTE4 
	if(FlagSWPORT2) WriteDataWord[3] |= 0x80;	
	else  WriteDataWord[3] &= 0x7f	;			            //0111 1111

    if(FlagSoftMute) WriteDataWord[3] |= 0x08;	
	else  WriteDataWord[3] &= 0xf7	;			            //1111 0111

    if(FlagSWPORT1) WriteDataWord[3] |= 0x01;	
	else  WriteDataWord[3] &= 0xfe	;			            //1111 1110


  

} 

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

/* Above are local sub routine and called in this file		*/

/*********************************************************
* NAME    : Tuner_Preset
*         PreSet the 5767 to a Staion_FREQ 
*
* Returns : none
*
* Parameter         Description
* --------------------------------------------------------
* none
* 
* Externals         Usage
* --------------------------------------------------------
* Target VCO		  in
*		
* Additional information:
* Local subfunction
* Tested, It is Ok. 4/16
*********************************************************/
void Tuner_Preset (BIT Mute, BIT SetMono,BIT Pin15,unsigned long VCO)    
{
  FlagSearch = False;               // Set global parameters
  FlagMono = SetMono;
  FlagSWPORT2 = Pin15;
  gdwPresetVCO = VCO; 
  FlagMute=Mute;                   //0301 mao 
     
  AssembleData();
  Tuner_I2cSendData();
  Delay10us(50000);                 //200ms


  Tuner_I2cReadData();						   //read data to ReadDataWord[] .
  Delay10us(2);				
 
  #if 0
  while (SWPORT1);
  while(!SearchOver() )               // waiting for station detected     
  {
  Delay10us(2000);
  Tuner_I2cSendData(); 
                                                 
  }  
 #endif			  				
                                        
} 



   /*********************************************************
* NAME    : main()
*           Main routine.
*
* Returns : none
*
* Parameter         Flow     Description
* --------------------------------------------------------
* none
*
*********************************************************/
void main(void)
{ 
    WriteDataWord[0] = 0x2a;		        // init FM89.8MHz ok.
    WriteDataWord[1] = 0x0b6;
    WriteDataWord[2] = 0x41;	             //p1 high		
    WriteDataWord[3] = 0x11;			
    WriteDataWord[4] = 0x40;
    Tuner_I2cSendData();



	Tuner_Preset( False, False,High,97100 )  ;



}