radio_pll.c

这是一个ＴＤＡ7540的模版程序

/***************************************************************************
Project  :   TDA7540 Jig board 
Compiler : ST7 HiCross C (HiWARE)
Module   :  Radio_pll.c
Version  :  V 1.0
Created  :  
Author   :  Jerry HE / ST-ShenZhen
Description
         -  PLL main routine
Modified
	  - Jan.24th,2005    
***************************************************************************/

#include "system.h"

/**************************************************************************/
/*             The pll functions                                           						    */
/**************************************************************************/
void Radio_FreqToPC(void);
unsigned char Radio_PLL_FMISet(void);
unsigned char Radio_PLL_AMISet(void);
void PllRegisterRefresh(void);
void Radio_PLL_RegisterSet(void);
void Radio_PLL_DisableIFCnt(void);
void Radio_PLL_EnableIFCnt(void);
void Get_MultiPointValue(void);
void Load_EEPROM_Value(unsigned char);
/**************************************************************************/
/*             Declare the variables                                           						    */
/**************************************************************************/
unsigned int T_radio_pll_pc;

/*--------------------------------------------------------------------------
Routine : PllRegisterRefresh
Input   : 
Output  :
Description 
        - refresh the pll register which related to pll change
--------------------------------------------------------------------------*/ 
void PllRegisterRefresh()
{
	Radio_FreqToPC();
	radio_pll_cpump &= 0xF0;
	if(radio_band < MW1)	   /*if in FM mode */
	  radio_pll_cpump |= Radio_PLL_FMISet(); 
	else
	  radio_pll_cpump |= Radio_PLL_AMISet(); 
	WriteTunerRegister(PLL_AREA);
	F_TunerDispReq =1;
	//here display flag should set to 1
}

/*--------------------------------------------------------------------------
Routine : PllRegisterAllRefresh
Input   : 
Output  :
Description 
        - refresh all pll register
--------------------------------------------------------------------------*/ 
void PllRegisterAllRefresh()
{
	Radio_PLL_RegisterSet();
	Radio_FreqToPC();
	WriteTunerRegister(PLL_AREA);
	WriteTunerRegister(IF_AREA);
	WriteTunerRegister(VCO_AREA);
	F_TunerDispReq =1;
	//here display flag should be set to 1...
}

/*--------------------------------------------------------------------------
Routine : Get_MultiPointValue
Input   : 
Output  :
Description 
        - Multi point auto alignment value load
--------------------------------------------------------------------------*/ 
void Get_MultiPointValue()
{
	if(radio_band != FM1)
	return;
	if(F_OnePointAlign == 1)   
		multi_point.current_point = M92_M104;
	else
	{
		if((radio_pll_freq>=FM87_5MHZ)&&(radio_pll_freq<FREQ_92))
		{
			multi_point.current_point = M87_M92;
		}
		if((radio_pll_freq>=FREQ_92)&&(radio_pll_freq < FREQ_104))
		{
			multi_point.current_point = M92_M104;
		}
		if((radio_pll_freq>FREQ_104)&&(radio_pll_freq <FM108MHZ))
		{
			multi_point.current_point = M104_M108;
		}
	}
	if((multi_point.current_point !=multi_point.backup_point)||\
		(multi_point.refresh == 1))
	{
	     multi_point.refresh = 0;
	     switch(multi_point.current_point)
	     {
		case M87_M92:
                     radio_tun_tunvolt2 = Eep_TV2_Point1;
			break;
		case M92_M104:
                     radio_tun_tunvolt2 = Eep_TV2_Point2;
			break;
		case M104_M108:
                     radio_tun_tunvolt2 = Eep_TV2_Point3;
			break;
	        }
	        WriteTunerRegister(TUNVOLT_AREA);
	}
	multi_point.backup_point = multi_point.current_point;
}

/*--------------------------------------------------------------------------
Routine : Load_EEPROM_Value
Input   : 
Output  :
Description 
        - load multi auto alignment value due to frequency change
--------------------------------------------------------------------------*/ 
void Load_EEPROM_Value(unsigned char point)
{
	switch(point)
	{
		case M87_M92:
                     radio_tun_tunvolt2 = Eep_TV2_Point1;
			break;
		case M92_M104:
                     radio_tun_tunvolt2 = Eep_TV2_Point2;
			break;
		case M104_M108:
                     radio_tun_tunvolt2 = Eep_TV2_Point3;
			break;
	}
	WriteTunerRegister(TUNVOLT_AREA);
}

/*--------------------------------------------------------------------------
Routine : Radio_FastPLL
Input   : 
Output  :
Description 
        - Fast PLL change; not load the tv 2
--------------------------------------------------------------------------*/ 
void Radio_FastPLL()
{
	T_radio_pll_pc = (radio_pll_freq << 1)+ radio_pll_offset + MIN_FM_PC;
	radio_pll_pcl = T_radio_pll_pc & 0xff;
	radio_pll_pch = (T_radio_pll_pc >> 8) & 0xff;	
	radio_pll_cpump &= 0xF0;
       radio_pll_cpump |= PLL_HICURRENT_3MA; 
	WriteTunerRegister(PLL_AREA);
}

/*--------------------------------------------------------------------------
Routine : Radio_FreqToPC
Input   : 
Output  :
Description 
        - Calculate the real PC counter value
--------------------------------------------------------------------------*/ 
void Radio_FreqToPC(void)
{	
	Get_MultiPointValue();
	switch (radio_band)
	{
		case FM1:
				T_radio_pll_pc = (radio_pll_freq << 1)+ radio_pll_offset + MIN_FM_PC;
				break;
				
		case MW1:
				T_radio_pll_pc = (radio_pll_freq - 0x11);
	                     T_radio_pll_pc = 9 * T_radio_pll_pc + radio_pll_offset;
	                     T_radio_pll_pc += MIN_AM531_PC;
				break;
		case LW:
			      T_radio_pll_pc = radio_pll_freq;
	                    T_radio_pll_pc = 9 * T_radio_pll_pc + radio_pll_offset;
	                    T_radio_pll_pc +=  MIN_LW144_PC;
			      break;
	}	
	radio_pll_pcl = T_radio_pll_pc & 0xff;
	radio_pll_pch = (T_radio_pll_pc >> 8) & 0xff;	
}

/*--------------------------------------------------------------------------
Routine : Radio_PLL_RegisterSet
Input   : 
Output  :
Description 
        - set pll register register
--------------------------------------------------------------------------*/ 
void Radio_PLL_RegisterSet(void)
{
#if TDA7540_IC
	if(radio_band < MW1)
	{
		radio_tun_vcoplldiv &= 0xC7;
		radio_tun_vcoplldiv |= PLL_REFERECE_50KHz;        //set pll reference to 50KHz 
		
		radio_pll_cpump &= 0x80;
		radio_pll_cpump = radio_pll_cpump|PLL_HIGHCURRENT_MODE|PLL_LOWCURRENT_100uA\
			              |Radio_PLL_FMISet();

		radio_pll_sampletime&= 0x48;
		radio_pll_sampletime = radio_pll_sampletime | PLL_LOCK_ENABLE | PLL_IFC_FMMODE \
			                  |PLL_TSAMPLE_FM5_12_AM32;
		radio_pll_ewcentre = PLL_IFC_CENTER_10_7MHZ | PLL_IFC_EW_FM12_5_AM2K;	
	}
	else
	{
		radio_tun_vcoplldiv &= 0xC7;
		radio_tun_vcoplldiv |= PLL_REFERECE_10KHz;

		radio_pll_cpump &= 0x80;
		radio_pll_cpump = radio_pll_cpump | PLL_HIGHCURRENT_MODE | PLL_LOWCURRENT_50uA\
			              |Radio_PLL_AMISet();

		radio_pll_sampletime&= 0x48;
		radio_pll_sampletime = radio_pll_sampletime | PLL_LOCK_ENABLE | PLL_IFC_AM450K\
			                  |PLL_TSAMPLE_FM5_12_AM32;
		radio_pll_ewcentre = PLL_IFC_CENTER_450KHZ| PLL_IFC_EW_FM12_5_AM2K;	

	}
#endif
}		

/*--------------------------------------------------------------------------
Routine : Radio_PLL_FMISet
Input   : 
Output  :
Description 
        - set the am charge pump current
--------------------------------------------------------------------------*/ 
unsigned char Radio_PLL_FMISet(void)
{
	if (radio_pll_freq < FM94_5MHZ)
		return (PLL_HICURRENT_1_5mA);
	if (radio_pll_freq < FM98_6MHZ)
		return (PLL_HICURRENT_3MA);
	if (radio_pll_freq < FM106_9MHZ)	
		return (PLL_HICURRENT_4_5mA);
	return (PLL_HICURRENT_6MA);
}

/*--------------------------------------------------------------------------
Routine : Radio_PLL_AMISet
Input   : 
Output  :
Description 
        - set am charge pump current
--------------------------------------------------------------------------*/ 
unsigned char Radio_PLL_AMISet(void)
{
	return(((radio_pll_freq+64)>>4) & 0x0F); 							
}

/*--------------------------------------------------------------------------
Routine : Radio_Tun_SeekOn
Input   : 
Output  :
Description 
        - radio seek on
--------------------------------------------------------------------------*/ 
void Radio_Tun_SeekOn(void)
{
	if (F_SEEKON==0)
	{
		F_SEEKON=1;
		radio_pll_cpump |= PLL_FMSEEK_ON;
		WriteTunerRegister(CPUMP_AREA);
	}
}

/*--------------------------------------------------------------------------
Routine : Radio_Tun_SeekOff
Input   : 
Output  :
Description 
        - radio seek off
--------------------------------------------------------------------------*/ 
void Radio_Tun_SeekOff(void)
{
	if (F_SEEKON==1)
	{
		F_SEEKON=0;
		F_TunerDispReq=1;
		Radio_PLL_DisableIFCnt();
		radio_pll_cpump &= 0x7F;
		radio_pll_cpump |= PLL_FMSEEK_OFF;
		WriteTunerRegister(CPUMP_AREA);
	}
}

/*--------------------------------------------------------------------------
Routine : Radio_PLL_EnableIFCnt
Input   : 
Output  :
Description 
        - Enable the IF counter
--------------------------------------------------------------------------*/ 
void Radio_PLL_EnableIFCnt(void)
{
   	radio_pll_sampletime &= 0xF7;
	radio_pll_sampletime |= PLL_IFC_ENABLE;
  	WriteTunerRegister(IF_SAMPLE_AREA);
}

/*--------------------------------------------------------------------------
Routine : Radio_PLL_DisableIFCnt
Input   : 
Output  :
Description 
        - disable the IF counter
--------------------------------------------------------------------------*/ 
void Radio_PLL_DisableIFCnt(void)
{
  	radio_pll_sampletime &= 0xF7;
	radio_pll_sampletime |= PLL_IFC_DISABLE;
  	WriteTunerRegister(IF_SAMPLE_AREA);
}

/*************************************************************************************************
ROUTINE NAME :Radio_PLL_FreqDec
INPUT		 :Max_freq, Min_freq
OUTPUT		 :
DESCRIPTION  :frequency increment by 1 step (auto mode) 
COMMENTS 
**************************************************************************************************/

void Radio_PLL_FreqInc(unsigned char Max_freq, unsigned char Min_freq)
{
	radio_pll_offset = 0;
	radio_pll_freq ++;
	if (radio_pll_freq > Max_freq)
	{
		radio_pll_freq = Min_freq;
	}

}

/*************************************************************************************************
ROUTINE NAME :Radio_PLL_FreqDec
INPUT		 :Max_freq, Min_freq                                                            
OUTPUT		 :
DESCRIPTION  :frequency decrement by 1 step (auto mode)
COMMENTS 
**************************************************************************************************/
void Radio_PLL_FreqDec(unsigned char Max_freq, unsigned char Min_freq)
{
  	radio_pll_offset = 0;
  	if (radio_pll_freq == Min_freq)	
  	{
  		radio_pll_freq = Max_freq;
  		return;
  	}		
  	radio_pll_freq --;
}

/*-----------------------------------------------------------------------------
ROUTINE NAME : TUN_EvalGetSMeter
INPUT/OUTPUT : None / Measured SMeter.
DESCRIPTION  : Measure the SMeter level and return its value.
COMMENTS     : For Diagnostic mode.
-----------------------------------------------------------------------------*/
unsigned char Radio_EvalGetSMeter (void)
{
	//unsigned char temp_val1,temp_val2;
	unsigned int iTemp_val;
	unsigned char temp_val2;
  	unsigned char i;
	iTemp_val = 0;
  	for (i=0; i<5; i++)
  	{
		temp_val2 = ADC_GetValue(SMETER)>>1;
		iTemp_val += (int) temp_val2;

  	}  	
       temp_val2 = iTemp_val / 5;
  	return(temp_val2);	
}

/*** (c) 2005  STMicroelectronics ****************** END OF FILE ***/