TEA5767采用I2C或者三线接口控制,我是用的I2C,单片机用STC89C52,带1K EEPROM,可以掉电存台,1602LCD显示.

TEA5767读写数据都是5个字节,其中PLL参数14位,具体数据格式请看datasheet.以下程序中的函数可以直接在主程序中调用.

#include iic.c

#define max_freq 108000

#define min_freq 87500

unsigned char radio_write_data[5]={0x29,0xc2,0x20,0x11,0x00}; //要写入TEA5767的数据

unsigned char radio_read_data[5]; //TEA5767读出的状态

unsigned int default_pll=0x29c2;//0x29f9; //默认存台的pll,87.8MHz

//unsigned int max_pll=0x339b; //108MHz时的pll,

//unsigned int min_pll=9000; //70MHz时的pll

void radio_write(void)

{

unsigned char i;

iic_start();

iic_write8bit(0xc0); //TEA5767写地址

if(!iic_testack())

{

for(i=0;i5;i++)

{

iic_write8bit(radio_write_data[i]);

iic_ack();

}

}

iic_stop();

}

//读TEA5767状态,并转换成频率

void radio_read(void)

{

unsigned char i;

unsigned char temp_l,temp_h;

pll=0;

iic_start();

iic_write8bit(0xc1); //TEA5767读地址

if(!iic_testack())

{

for(i=0;i5;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();

}

//由频率计算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); //频率单位:k

else

pll=(unsigned int)((float)((frequency-225)*4)/(float)32.768); //频率单位:k

}

//由PLL计算频率

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); //频率单位:KHz

else

frequency=(unsigned long)((float)(npll)*(float)8.192+225); //频率单位:KHz

}