fmtuner.c

一个panisonic 的收音头驱动程序。不错

#include "reg52.h"
#include "intrins.h"
#include "custdef.h"
#include "i2c_comm.h"
#include "eeprom.h"
#include "fmtuner.h"
#include "kernel.h"
#include "audio_control.h"
#define FMTUNERWRITEADDRESS		0xB6
#define FMTUNERREADADDRESS		0xB7
#define TUNER_START				0x20
#define NO_MEM_MODE		0x00
#define MEM_MODE		0x01

#define AM_STEP_WIDTH	9		//9Khz
#define AM_MAX_FREQ		1620
#define AM_MIN_FREQ		522
#define AM_IF_FREQ		450
#define AM_MAX_COUNT	((AM_MAX_FREQ+AM_IF_FREQ)/AM_STEP_WIDTH)
#define AM_MIN_COUNT ((AM_MIN_FREQ+AM_IF_FREQ)/AM_STEP_WIDTH) 

#define W40KHZ		group1_00&=0xfc
#define W80KHZ		group1_00&=0xfc,group1_00|=0x01
#define W120KHZ		group1_00&=0xfc,group1_00|=0x02
#define W160KHZ		group1_00&=0xfc,group1_00|=0x03
#define G0DB			group1_00&=0xcf
#define GMINUS6DB	group1_00&=0xcf,group1_00|=0x10
#define GPLUS7DB	group1_00&=0xcf,group1_00|=0x20
#define GPLUS4DB	group1_00&=0xcf,group1_00|=0x30
#define SET_FM_WIDTH	W40KHZ
#define SET_FM_IF_GAIN	GPLUS7DB

#define SET_FM_MODE		group2_03&=0xfe
#define SET_AM_MODE		group2_03|=0x01
#define SET_SD_SWITCH_ON	group2_03|=0x02
#define SET_SD_SWITCH_OFF	group2_03&=0xfd
#define SET_MONO_ON		group2_03|=0x04
#define SET_MONO_OFF		group2_03&=0xfb
#define SET_TUNER_MUTE_ON	group2_03|=0x20
#define SET_TUNER_MUTE_OFF	group2_03&=0xdf

#define SET_32MS	group2_04&=0xf9
#define SET_64MS	group2_04&=0xf9,group2_04|=0x02
#define SET_256MS	group2_04&=0xf9,group2_04|=0x04
#define SET_512MS	group2_04&=0xf9,group2_04|=0x06
#define SET_FM_GATE_TIME		SET_64MS

#define LOCK_DETECT_ON			group2_04|=0x01
#define LOCK_DETECT_OFF		group2_04&=0xfe
#define SET_SD_BANDWIDTH_ON	group2_04|=0x10
#define SET_SD_BANDWIDTH_OFF  group2_04&=0xef

#define BAND25K				group2_04&=0x1f
#define BAND37DOT5K		group2_04&=0x1f,group2_04|=0x20
#define BAND50K				group2_04&=0x1f,group2_04|=0x40
#define BAND62DOT5K		group2_04&=0x1f,group2_04|=0x60
#define BAND75K				group2_04&=0x1f,group2_04|=0x80
#define BAND87DOT5K		group2_04&=0x1f,group2_04|=0xa0
#define BAND100K			group2_04&=0x1f,group2_04|=0xc0
#define BAND112DOT5K		group2_04&=0x1f,group2_04|=0xe0
#define SET_SD_BANDWIDTH	BAND50K

#define SET_PLL1				group2_05&=0xfe
#define SET_PLL10			group2_05|=0x01
#define PLLDIVIDER01K		group2_05&=0xf1
#define PLLDIVIDER03K		group2_05&=0xf1,group2_05|=0x02
#define PLLDIVIDER05K		group2_05&=0xf1,group2_05|=0x04
#define PLLDIVIDER09K		group2_05&=0xf1,group2_05|=0x06
#define PLLDIVIDER10K		group2_05&=0xf1,group2_05|=0x08
#define PLLDIVIDER125K		group2_05&=0xf1,group2_05|=0x0a
#define PLLDIVIDER25K		group2_05&=0xf1,group2_05|=0x0c
#define PLLDIVIDER50K		group2_05&=0xf1,group2_05|=0x0e
#define SET_PLLDIVIDER		PLLDIVIDER50K
#define SET_PLLDEADZONE	group2_05|=0x10
//#define SET_PLLDEADZONE	group2_05&=0xef	// detector
#define SET_PLLCHARGEPUMP 	group2_05|=0x60
#define SET_FM_IF_AMP_STOP			group2_0a &=0x7f
#define SET_FM_IF_AMP_START			group2_0a |=0x80
#define SET_MONITER_PS					group2_0a &=0xf8;group2_0a |=0x01
#define SET_MONITER_ANC				group2_0a &=0xf8;group2_0a |=0x02
#define SET_MONITER_RED				group2_0a &=0xf8;group2_0a |=0x03
#define SET_MONITER_F450				group2_0a &=0xf8;group2_0a |=0x04
#define SET_MONITER_NIFC				group2_0a &=0xf8;group2_0a |=0x05
#define SET_MONITER_POINT				SET_MONITER_NIFC
#define SET_IF_FREQ_ON	group2_03|=0x02
#define SET_IF_FREQ_OFF	group2_03&=0xfd

 BYTE memory_status;
 BYTE bandswitch;                /*0,fm;1,am*/
 BYTE st_mono;                    /*0--mono ; 1--st*/
 BYTE fm_ch;
 BYTE am_ch;	
WORD ambak;
WORD fmbak;   
WORD curfmfreq;
WORD curamfreq;
 BYTE  fmamflag;
static BYTE group1_00;
static BYTE group1_01;
static BYTE group1_02;
static BYTE group2_03;
static BYTE group2_04;
static BYTE group2_05;
static BYTE group2_0a;
BYTE search_station;
BYTE detect_station;
BYTE searchupordown;
BYTE found_ch;
BYTE found_station;
WORD code fmfreq[FM_MAX_MEM_BAND]=
{
    0x7AC,0x7e0,0x880,0x920,0x946,0x7AC,0x7e0,0x880,0x920,0x946,
    0x7AC,0x7e0,0x880,0x920,0x946,0x7AC,0x7e0,0x880,0x920,0x946,
    0x7AC,0x7e0,0x880,0x920,0x946,0x7AC,0x7e0,0x880,0x920,0x946,
    0x7AC,0x7e0,0x880,0x920,0x946,0x7AC,0x7e0,0x880,0x920,0x946
};// 87.5 90.1 98.1 106.1 108.0
WORD code amfreq[AM_MAX_MEM_BAND]=
{
0x1440,0x1620,0x1e30,0x2680,0x2b20,
0x1440,0x1620,0x1e30,0x2680,0x2b20,
0x1440,0x1620,0x1e30,0x2680,0x2b20,
0x1440,0x1620,0x1e30,0x2680,0x2b20,
0x1440,0x1620,0x1e30,0x2680,0x2b20,
0x1440,0x1620,0x1e30,0x2680,0x2b20,
0x1440,0x1620,0x1e30,0x2680,0x2b20,
0x1440,0x1620,0x1e30,0x2680,0x2b20
};//522 612 999 1400 1620
BYTE idata configvalue[]=
{
0xa8,// a8 IF 40Khz    a9  IF 80Khz
0x45,
0x4f,
0x00,
0xc6,
0x1e,
0xde,
0x07,
0x00,
0x00,
0x80,
0x00,
0x00,
0x00,
0x00,
0x00
};

void Fmtuner_Read(BYTE subaddress,BYTE *databuffer, BYTE datalen)
{
	I2C_Start();
	I2C_WriteByte(FMTUNERWRITEADDRESS);
	I2C_Ack();
	
	I2C_WriteByte(subaddress);	
	I2C_Ack();
	
	I2C_Start();
	I2C_WriteByte(FMTUNERREADADDRESS);
	I2C_Ack();
	
	while(datalen!=1)
	{
		*databuffer=I2C_ReadByte();
		I2C_Ack();
		databuffer++;
		datalen--;
	}
	*databuffer=I2C_ReadByte();
	I2C_NoAck();
	I2C_Stop();
}
void Fmtuner_Write(BYTE subaddress,BYTE *databuffer, BYTE datalen)
{
	BYTE datanum,temp2;
	BYTE pagei;
	
	temp2=datalen;
	for( pagei=0;pagei<=(datalen/8);pagei++)
	{
		if(temp2>8) 
		{
			datanum=8;
			temp2-=8;
		}
		else datanum=temp2;	
		if (pagei == 0)
		{
			I2C_Start();
			I2C_WriteByte(FMTUNERWRITEADDRESS);
			I2C_Ack(); 
		 	
			I2C_WriteByte(subaddress);
			I2C_Ack();
		
			for(;datanum!=0;datanum--)
			{
				I2C_WriteByte(*databuffer);
		 		I2C_Ack();
				databuffer++;
			}
			I2C_Stop();
			Delay_X_ms(10);		
		}
		else
		{
			I2C_Start();
			I2C_WriteByte(FMTUNERWRITEADDRESS);
			I2C_Ack(); 
		 	
			I2C_WriteByte(subaddress+pagei*8);
			I2C_Ack();
		
			for(;datanum!=0;datanum--)
			{
				I2C_WriteByte(*databuffer);
		 		I2C_Ack();
				databuffer++;
			}
			I2C_Stop();
			Delay_X_ms(10);		
		
		}

	} 	
}
void WriteToEeprom(BYTE stationnum, WORD wfreq)
{
	BYTE temp,address;
	if (fmamflag==0) // 0: fm 1:am
	{
		temp=wfreq &0xff;
		address = stationnum*2+FM_STATION_START;
		Eeprom_Write(address, &temp,1);
		temp=(wfreq>>8)&0xff;
		address = stationnum*2+1+FM_STATION_START;
		Eeprom_Write(address, &temp,1);
	}
	else
	{
		temp=wfreq &0xff;
		address = stationnum*2+AM_STATION_START;
		Eeprom_Write(address, &temp,1);
		temp=(wfreq>>8)&0xff;
		address = stationnum*2+1+AM_STATION_START;
		Eeprom_Write(address, &temp,1);
	}
}
BYTE ReadFromEepromtest(BYTE stationnum)
{
	WORD temp;
	BYTE temp1,address;
	temp=0;
	if (fmamflag==0) // 0: fm 1:am
	{
		address=(stationnum)*2+1+FM_STATION_START;
		Eeprom_Read(address,&temp1,1);
		temp=temp1;
		address=(stationnum)*2+FM_STATION_START;
		Eeprom_Read(address,&temp1,1);
		temp=((temp<<8)&0xff00)|temp1;
              if ((temp < FM_MIN_COUNT) || (temp > FM_MAX_COUNT))
                return 1;
       }
	else
	{
		address=(stationnum)*2+1+AM_STATION_START;
		Eeprom_Read(address,&temp1,1);
		temp=temp1;
		address=(stationnum)*2+AM_STATION_START;
		Eeprom_Read(address,&temp1,1);
		temp=((temp<<8)&0xff00)|temp1;
              if ((temp >= AM_MIN_COUNT) && (temp <= AM_MAX_COUNT))
                ambak = temp;
              else
                return 1;
	}
	return 0;
}

BYTE ReadFromEeprom(BYTE stationnum)
{
	WORD temp;
	BYTE temp1,address;
	temp=0;
	if (fmamflag==0) // 0: fm 1:am
	{
		address=(stationnum)*2+1+FM_STATION_START;
		Eeprom_Read(address,&temp1,1);
		temp=temp1;
		address=(stationnum)*2+FM_STATION_START;
		Eeprom_Read(address,&temp1,1);
		temp=((temp<<8)&0xff00)|temp1;
              if ((temp >= FM_MIN_COUNT) && (temp <= FM_MAX_COUNT))
                fmbak = temp;
              else 
                return 1;
       }
	else
	{
		address=(stationnum)*2+1+AM_STATION_START;
		Eeprom_Read(address,&temp1,1);
		temp=temp1;
		address=(stationnum)*2+AM_STATION_START;
		Eeprom_Read(address,&temp1,1);
		temp=((temp<<8)&0xff00)|temp1;
              if ((temp >= AM_MIN_COUNT) && (temp <= AM_MAX_COUNT))
                ambak = temp;
              else
                return 1;
	}
	return 0;
}
void Tuner_Init()
{
       BYTE i;
	for(i=0;i<FM_MAX_MEM_BAND-30;i++)
	{
	        fmamflag=0;    //0:fm, 1:am
		WriteToEeprom(i+1,fmfreq[i]);
	}
	for(i=0;i<AM_MAX_MEM_BAND-30;i++)
	{
	       fmamflag=1;    //0:fm, 1:am
		WriteToEeprom(i+1,amfreq[i]);
	}
	memory_status=NO_MEM_MODE;
	fmamflag=0;    //0:fm, 1:am
	//fmbak = 0x07DE;// 90Mhz
	//fmbak = 0x086c;// 97.1Mhz
       fmbak=0x7AC; // 87.5
       fm_ch=1;
       ambak=0x1440; //522Khz
       am_ch=1;
	configvalue[3]&=0xFE; // fm
	Set_Freq(fmbak);
	Reset_Tuner_Config();
       //Set_Station(1);
	
}
void Tuner_Select_FM()
{
	fmamflag = 0;
	configvalue[3]&=0xFE;
	Fmtuner_Write(3, &configvalue[3], 1);

	
}
void Tuner_Select_AM()
{
	fmamflag = 1;
	configvalue[3]|=fmamflag;
	Reset_Tuner_Config();
}
void Reset_Tuner_Config()
{
        Fmtuner_Write(0x00,configvalue,sizeof(configvalue));
}
#if 0
BYTE Is_Stereo()
{
	return 0;
}
#endif
//#define TEST_IF_COUNT
#ifdef TEST_IF_COUNT
extern BYTE if_count;
#endif
BYTE Is_Station()
{
	BYTE temp;
	BYTE retry_count;
	//P3_2=1;
    	if (fmamflag == 0) // 0:fm 1:am
    	   Set_Freq(fmbak);
    	else
	    Set_Freq(ambak);
        configvalue[3] = 0x10;// Mute on
        Reset_Tuner_Config();
        found_station = 0;
        //search_station = 0;
       if (P3_2 == 0)
       {
        	configvalue[2] = 0x02;// SD mode on
        	//Delay_X_ms(100);
        	Reset_Tuner_Config();
                retry_count = 5;
      	      while(--retry_count )
        	{
                    temp = 0x02;// must be this value
                    Fmtuner_Write(0x83, &temp, 1);
                    Delay_X_ms(100); 
        	       //if (P3_2 == 0)
            	       {
                        Fmtuner_Read(0x00,&temp,1);
                        #ifdef TEST_IF_COUNT
                        if_count = temp&0xf;
                        #endif
                        if ((temp & 0x01)== 0x01)
                        {
                        search_station = 1;
                        found_station = 1;
                        configvalue[2] = 0x00;// SD mode off