TEA5767调频收音机芯片C51程序

lvyongshjd

TEA5767采用I2C接口控制,单片机用AT89C52.晶振11.0592Mhz。采用四位LED显示。已经应用于产品了噢！
/***************************************************************************************************
TEA5767采用I2C接口控制.TEA5767读写数据都是5个字节,其中PLL参数14位.
以下程序中的函数可以直接在主程序中调用.Fosc =11.0592Mhz.
PCB:WRT-TEST BOARD????? VER:A0
****************************************************************************************************/
#include
#include
#include "tea5767.h"
#include "iic.h"
#include "key.h"
#include "led.h"
/***********************************************************************************/
#define XTAL32K
#define max_freq 108000???? //108Mhz
#define min_freq 87500??????? //87.5Mhz
#define max_pll 0x339b?????? //108MHz时的pll.
#define min_pll 0x299d??????? //87.5MHz时的pll.
#define Add_Freq??? 1
#define Dec_Freq??? 0
#ifdef XTAL32K
#define REFERENCE_FREQ??? 32.768
#else
#define REFERENCE_FREQ??? 50.000
#endif
unsigned char radio_write_data[5]={0x2A,0xB6,0x40,0x11,0x40};??????? //初始化写入TEA5767的数据(FM89.8Mhz)
unsigned char radio_read_data[5];????????????????????
unsigned int Pll_Data;
unsigned long Frequency_Data;
/***********************************************************************************/
void Initialization(void)
{
??? TMOD = 0x11;
??? TH0 = 0x5d;
??? TL0 = 0x3d;
??? TR0 = 0;???//25ms
??? TH1 = 0x5d;
??? TL1 = 0x3d;
??? TR1 = 0;???//25ms
??? T2CON = 0x30;
??? T2MOD = 0x00;
??? RCAP2H = 0xFE;
??? TH2 = RCAP2H;
??? RCAP2L = 0xFB;
??? TL2 = RCAP2L;
??? TR2 = 0;???//2400bps
??? PCON = 0x00;
??? SCON = 0xD0;
??? IP = 0x14;
??? EX0 = 1;
??? IT0 = 1;
??? ET0 = 1;
??? EX1 = 1;
??? IT1 = 1;
??? ES = 0;
??? EA = 0;
}
/***********************************************************************************/
//读TEA5767状态,并转换成频率
void Radio_Read(void)
{
??? unsigned char i;
??? unsigned char temp_l,temp_h;
??? Pll_Data = 0;
??? ATIICxx_PRead(&radio_read_data[0],5);
???
??? temp_l = radio_read_data[1];
??? temp_h = radio_read_data[0];
??? temp_h &= 0x3f;
??? Pll_Data = temp_h*256+temp_l;
??? Get_Frequency();
}
/***********************************************************************************/
//由PLL计算频率
void Get_Frequency(void)
{
??? unsigned char hlsi;
??? unsigned int npll = 0;
???
??? npll = Pll_Data;
??? hlsi = radio_read_data[2]&0x10;
??? if (hlsi)
??????? Frequency_Data = (unsigned long)((float)(npll)*(float)REFERENCE_FREQ*(float)0.25-225);??? //频率单位:KHz
??? else
??????? Frequency_Data = (unsigned long)((float)(npll)*(float)REFERENCE_FREQ*(float)0.25+225);??? //频率单位:KHz
}
/***********************************************************************************/
//由频率计算PLL
void Get_Pll(void)
{
??? unsigned char hlsi;
??? hlsi = radio_read_data[2]&0x10;
??? if (hlsi)
??????? Pll_Data = (unsigned int)((float)((Frequency_Data+225)*4)/(float)REFERENCE_FREQ);??? //频率单位:k
??? else
??????? Pll_Data = (unsigned int)((float)((Frequency_Data-225)*4)/(float)REFERENCE_FREQ);??? //频率单位:k
}
/***********************************************************************************/
//手动设置频率,mode=1,+0.1MHz; mode="0:-0".1MHz ,不用考虑TEA5767用于搜台的相关位:SM,SUD
void Search(unsigned char mode)
{
??? Radio_Read();
???????????
??? if(mode)
??? {
??????? Frequency_Data += 100;
??????? if(Frequency_Data > max_freq)
??????????? Frequency_Data = min_freq;
??? }
??? else
??? {
??????? Frequency_Data -= 100;
??????? if(Frequency_Data < min_freq)
??????????? Frequency_Data = max_freq;
??? }
?????????????
??? Get_Pll();
??? radio_write_data[0] = Pll_Data/256;
??? radio_write_data[1] = Pll_Data%256;
??? radio_write_data[2] = 0x41;
??? radio_write_data[3] = 0x11;
??? radio_write_data[4] = 0x40;
??? ATIICxx_PWrite(&radio_write_data[0],5);
}
/***********************************************************************************/
//自动搜台,mode=1,频率增加搜台; mode="0:频率减小搜台".
void Auto_Search(unsigned char mode)
{
??? Radio_Read();
??? Get_Pll();
??? if(mode)
??? {
??????? radio_write_data[2] = 0xb1;
??????? if(Pll_Data > max_pll)
??????? {
??????????? Pll_Data = min_pll;
??????? }
??? }
??? else
??? {
??????? radio_write_data[2] = 0x41;
??????? if(Pll_Data < min_pll)
??????? {
??????????? Pll_Data = max_pll;
??????? }
??? }
?????????
??? radio_write_data[0] = Pll_Data/256+0x40;
??? radio_write_data[1] = Pll_Data%256;???
??? radio_write_data[3] = 0x11;
??? radio_write_data[4] = 0x40;
??? ATIICxx_PWrite(&radio_write_data[0],5);
??? Radio_Read();
??? while(!(radio_read_data[0]&0x80))???? //RF电台就绪标志
??? {
??????? Radio_Read();
??? }???
}
/***********************************************************************************/
void main(void)
{
??? unsigned char i;
???
??? Initialization();
??? radio_write_data[0] = 0x2A;
??? radio_write_data[1] = 0xB6;
??? radio_write_data[2] = 0x41;
??? radio_write_data[3] = 0x11;
??? radio_write_data[4] = 0x40;
??? ATIICxx_PWrite(&radio_write_data[0],5);//初始化TEA5767(89.8Mhz)
??? Frequency_Data = 89800;
??? while(1)
??? {
??? ?i = GetKey();
??? ?
??? ?Led_Display(Frequency_Data);
??? ?
??? ?switch (i)
??? ?{
??????????????? case 0x00:
??????????????? {
??????????????????? Search(Add_Freq);
??????????????? };
??????????????? break;
???????????????
??????????????? case 0x01:
??????????????? {
??????????????????? Search(Dec_Freq);
??????????????? };
??????????????? break;
???????????????
??????????????? case 0x02:
??????????????? {
??????????????????? Auto_Search(Add_Freq);
??????????????? };
??????????????? break;
???????????????
??????????????? case 0x03:
??????????????? {
??????????????????? Auto_Search(Dec_Freq);
??????????????? };
??????????????? break;
???????????????
??????????????? default: break;
???????? }
??? }
}
#include
#include
#include "iic.h"
#include "key.h"
/*********************************************************************/
/* IIC读写程序芯片型号*/
/*********************************************************************/
/*********************************************************************/
sbit I2C_SCK=P3^6; /*实时时钟时钟线引脚 */
sbit I2C_SDA=P3^7; /*实时时钟数据线引脚 */
/*********************************************************************/
#define ATIIcxxDriverAddressW 0xC0
#define ATIIcxxDriverAddressR 0xC1
#define _Nop()? _nop_(),_nop_(),_nop_(),_nop_(),_nop_()??? /*定义空指令*/
/*********************************************************************/
struct bytedata_2
{
?unsigned char ByteH;
?unsigned char ByteL;
};

union int2byte
{
?unsigned int IntData;
?struct bytedata_2 ByteData;
};
/*********************************************************************/
//启动I2C总线,退出时SCL为低
void I2C_Start(void)
{
?I2C_SDA=1;??? /*发送起始条件的数据信号*/
?_Nop();
?I2C_SCK=1;
?_Nop();???? /*起始条件建立时间大于4.7us,延时*/
?_Nop();
?_Nop();
?_Nop();
?_Nop();???
?I2C_SDA=0;??? /*发送起始信号*/
?_Nop();???? /* 起始条件锁定时间大于4μs*/
?_Nop();
?_Nop();
?_Nop();
?_Nop();??????
?I2C_SCK=0;??? /*钳住I2C总线，准备发送或接收数据 */
}
//*停止I2C总线
void I2C_Stop(void)
{
?I2C_SCK=0;
?I2C_SDA=0;?? /*发送结束条件的数据信号*/
?_Nop();??? ?????? /*发送结束条件的时钟信号*/
?I2C_SCK=1;?? /*结束条件建立时间大于4μs*/
?_Nop();
?_Nop();
?_Nop();
?_Nop();
?_Nop();
?I2C_SDA=1;?? /*发送I2C总线结束信号*/
}
//MCU等待应答位(返回0表示应答)
bit I2C_WaitAck(void)
{
?unsigned char ucErrTime = 200;???//因故障接收方无ACK，超时值。
?
?I2C_SCK=0;
?I2C_SDA=1;
?_Nop();
?I2C_SCK=1;
? ?while(I2C_SDA)
? ?{
??? ??ucErrTime--;
??? ??if (ucErrTime == 0)
??? ??{
????? ???I2C_Stop();
????? ???return 0;
???? ??}
? ?}
? ?
? ?I2C_SCK=0;
? ?return 1;??
}
//MCU应答信号
void I2C_Ack(void)
{
?I2C_SCK=0;
?I2C_SDA=0;
?_Nop();
?_Nop();
?_Nop();
?_Nop();
?_Nop();
?I2C_SCK=1;
?_Nop();
?_Nop();
?_Nop();
?_Nop();
?_Nop();
?I2C_SCK=0;
}
//MCU发送非应答信号
void I2C_Noack(void)
{
?I2C_SCK=0;
?I2C_SDA=1;
?_Nop();
?_Nop();
?I2C_SCK=1;
?_Nop();
?_Nop();
?I2C_SCK=0;
}
void I2C_Send_Byte(unsigned char sendbyte)
{
?unsigned char i = 8;
?
?while( i-- )
?{
??I2C_SCK = 0;
??_Nop(); //_Nop();
??if ( sendbyte &0x80 ) I2C_SDA =1;
??else I2C_SDA =0;
??_Nop(); //_Nop();
??I2C_SCK = 1;
??_Nop(); //_Nop();
??sendbyte

TEA5767调频收音机芯片C51程序

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