這幾天做個(gè)案子,用到飛利浦的TEA5767的收音機(jī)模塊,在網(wǎng)上搜了下相關(guān)的內(nèi)容,發(fā)現(xiàn)很多人都在問(wèn),可是提供編程指導(dǎo)的很少,可能是高手都不屑回答這些小問(wèn)題吧,在這里我把我的部分程序及TEA5767的相關(guān)資料放上來(lái)吧,給需要的人一些參考.(PS:無(wú)錫硅動(dòng)力的SP3767和TEA5767完全兼容,有中文資料)

TEA5767采用I2C或者三線接口控制,我是用的I2C,單片機(jī)用STC89C52,帶1K EEPROM,可以掉電存臺(tái),1602LCD顯示.

TEA5767讀寫數(shù)據(jù)都是5個(gè)字節(jié),其中PLL參數(shù)14位,具體數(shù)據(jù)格式請(qǐng)看datasheet.以下程序中的函數(shù)可以直接在主程序中調(diào)用.

#include "iic.c"
#define max_freq 108000
#define min_freq 87500
unsigned char radio_write_data[5]={0x29,0xc2,0x20,0x11,0x00};        //要寫入TEA5767的數(shù)據(jù)
unsigned char radio_read_data[5];        //TEA5767讀出的狀態(tài)
unsigned int default_pll=0x29c2;//0x29f9;        //默認(rèn)存臺(tái)的pll,87.8MHz
//unsigned int max_pll=0x339b;            //108MHz時(shí)的pll,
//unsigned int min_pll=9000;            //70MHz時(shí)的pll

void radio_write(void)
{
    unsigned char i;
    iic_start();
    iic_write8bit(0xc0);        //TEA5767寫地址
    if(!iic_testack())
    {
        for(i=0;i<5;i++)
        {
            iic_write8bit(radio_write_data[i]);
            iic_ack();
        }
    }
    iic_stop();   
}

//讀TEA5767狀態(tài),并轉(zhuǎn)換成頻率
void radio_read(void)
{
    unsigned char i;
    unsigned char temp_l,temp_h;
    pll=0;
    iic_start();
    iic_write8bit(0xc1);        //TEA5767讀地址
    if(!iic_testack())
    {
        for(i=0;i<5;i++)
        {
            radio_read_data[i]=iic_read8bit();
            iic_ack();
        }
    }
    iic_stop();
    temp_l=radio_read_data[1];
    temp_h=radio_read_data[0];
    temp_h&=0x3f;
    pll=temp_h*256+temp_l;
    get_frequency();
}

//由頻率計(jì)算PLL
void get_pll(void)
{
    unsigned char hlsi;
    unsigned int twpll=0;
    hlsi=radio_write_data[2]&0x10;
    if (hlsi)
        pll=(unsigned int)((float)((frequency+225)*4)/(float)32.768);    //頻率單位:k
    else
        pll=(unsigned int)((float)((frequency-225)*4)/(float)32.768);    //頻率單位:k
}
//由PLL計(jì)算頻率
void get_frequency(void)
{
    unsigned char hlsi;
    unsigned int npll=0;
    npll=pll;
    hlsi=radio_write_data[2]&0x10;
    if (hlsi)
        frequency=(unsigned long)((float)(npll)*(float)8.192-225);    //頻率單位:KHz
    else
        frequency=(unsigned long)((float)(npll)*(float)8.192+225);    //頻率單位:KHz
}

//手動(dòng)設(shè)置頻率,mode=1,+0.1MHz; mode=0:-0.1MHz ,不用考慮TEA5767用于搜臺(tái)的相關(guān)位:SM,SUD
void search(bit mode)
{
    radio_read();       
    if(mode)
    {
        frequency+=100;
        if(frequency>max_freq)
            frequency=min_freq;
    }
    else
    {
        frequency-=100;
        if(frequency<min_freq)
            frequency=max_freq;
    }         
    get_pll();
    radio_write_data[0]=pll/256;
    radio_write_data[1]=pll%256;
    radio_write_data[2]=0x20;
    radio_write_data[3]=0x11;
    radio_write_data[4]=0x00;
    radio_write();
}

//自動(dòng)搜臺(tái),mode=1,頻率增加搜臺(tái); mode=0:頻率減小搜臺(tái),不過(guò)這個(gè)好像不能循環(huán)搜臺(tái)
void auto_search(bit mode)
{
    radio_read();
    get_pll();
    if(mode)
        radio_write_data[2]=0xa0;
    else
        radio_write_data[2]=0x20;   
    radio_write_data[0]=pll/256+0x40;
    radio_write_data[1]=pll%256;   
    radio_write_data[3]=0x11;
    radio_write_data[4]=0x00;
    radio_write();
    radio_read();
    while(!(radio_read_data[0]&0x80))     //搜臺(tái)成功標(biāo)志
    {
        radio_read();
        disp_freq(9,1);
    }   
}