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1、SI4730 收音机芯片资料与程序2010-03-06 12:50/*在网上看到关于这个SI4730的收音机芯片的资料比较少，所以现在特发上来，共有缘人参考，如有不对之处，请指出。！晶振：24MHz单片机:at89s52注：转载请注明出处，否则追究法律责任！日期：2010-03-06版本：v1.0设计者：swsSI4730资料下载地址：*/#includereg52.h#includeintrins.htypedef unsigned char uchar;typedef unsigned int uint;#define HIGH 1#define LOW 0#define SI4730_H
2、IGH /4730选择地址定义/#define SI4730_LOW#define Max_freq_FM 10800 /108MHz#define Min_freq_FM 8750 /87.5MHz#define max_freq_AM 1701 /1701KHz#define min_freq_AM 531 #define FM_RECEIVER 0x20 /FM调谐频率 page.52#define FM_TRNSMITTER 0x30#define AM_RECEIVER 0x40 /AM调谐频率#define TX_TUNE_MEASURE 0x32uint Frequency_fm
3、=875;uint Frequency_am=531;bit Mode = 0;sbit KEY_UP = P22; /向上搜台sbit KEY_DW = P23; /向下搜台sbit FM_AM_Choose = P24; /FM与AM选择bit FM_AM_ = 0;/*START condition:SCLK: -|_ SDIO:-|_ 1 | 2 | 3STOP condition:SCLK: _|- SDIO:_|-1 | 2 | 3DATA:SCLK:_|-|_|-|_ SDIO:_|-|_|- |RESET:SENB:_|-SDIO:_|-RST: _|-SCLK:_|- | 1
4、 | 2 | 3*/sbit Si4730_Reset = P13;sbit Si4730_SCLK = P12;sbit Si4730_SDIO = P11;/如果SI4730的第六脚（SEN）接高电平那么地址是0x23,0x22/如果SI4730的第六脚（SEN）接低电平那么地址是0xc7,0xc6/#if 0 /address switch#ifdef SI4730_LOW#define READ_ADDR 0x23#define WRITE_ADDR 0x22#endif#ifdef SI4730_HIGH#define READ_ADDR 0xc7#define WRITE_ADDR
5、 0xc6#endif#define SCLK_HIGH Si4730_SCLK = HIGH#define SCLK_LOW Si4730_SCLK = LOW#define SDIO_HIGH Si4730_SDIO = HIGH#define SDIO_LOW Si4730_SDIO = LOW#define READ_SDIO Si4730_SDIO/=FM START=void _NOP()_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();void Si4730_Delay(unsigned char k)uchar i,j;for(i=
6、150;i0;i-) for(j=k;j0;j-);#define I2C_CLK_Delay() _NOP()void ResetSi47XX_2w() Si4730_Reset = LOW; SCLK_HIGH; Si4730_Delay(100); SDIO_HIGH; Si4730_Delay(250); Si4730_Reset = HIGH;void Si4730_start() SDIO_HIGH; I2C_CLK_Delay(); SCLK_HIGH; I2C_CLK_Delay(); SDIO_LOW; I2C_CLK_Delay(); SCLK_LOW;void Si473
7、0_ack() SDIO_LOW; I2C_CLK_Delay(); SCLK_HIGH; I2C_CLK_Delay(); SCLK_LOW; I2C_CLK_Delay(); SDIO_HIGH;void Si4730_stop() SDIO_LOW; I2C_CLK_Delay(); SCLK_HIGH; I2C_CLK_Delay(); SDIO_HIGH; I2C_CLK_Delay(); SCLK_LOW;void Si4730_writebyte(uchar write_data)uchar i;for(i=8;i!=0;i-) / 循环移入8个位 READ_SDIO = (bi
8、t)(write_data & 0x80); SCLK_HIGH; I2C_CLK_Delay(); SCLK_LOW; /SDA数据线上数据变化 write_data = 1; /调整发送位void Operation_Si4730_Write(uchar *data1,uchar numByte)uchar j;Si4730_start();Si4730_writebyte(WRITE_ADDR);/器件地址 0xc6Si4730_ack();I2C_CLK_Delay();for(j=LOW;j=300mSSi4730_Delay(250);Si4730_Delay(250);Si473
9、0_Delay(120); void Si4730_Tune(char mod,unsigned short Channel_Freq)unsigned char write_buf5;write_buf0= mod; write_buf1= 0x00;write_buf2 = Channel_Freq 8; /写入高字节write_buf3 = Channel_Freq; /写入低字节write_buf4= 0x00; Operation_Si4730_Write(&(write_buf0), 5);void Search_FM() /调用手动FM 频率调整子程序 menu = 15 if(
10、Mode) Frequency_fm += 10; /步进+0.1MHz if(Frequency_fm Max_freq_FM) Frequency_fm = Min_freq_FM; else Frequency_fm -= 10; /步进-0.1MHz if(Frequency_fm 8; /写入高字节write_buf3 = Channel_Freq; /写入低字节write_buf4= 0x00;write_buf5= 0x00; Operation_Si4730_Write(&(write_buf0), 6);void Search_AM() /调用手动FM 频率调整子程序 men
11、u = 95 if(Mode) Frequency_am += 9; /步进+9KHz if(Frequency_am max_freq_AM) Frequency_am = min_freq_AM; else Frequency_am -= 9; /步进-9KHz if(Frequency_am min_freq_AM) Frequency_am = max_freq_AM; / Si4730_Power_Up(AM_RECEIVER); /向上搜台Si4730_Tune_AM(AM_RECEIVER,Frequency_am); /AM收音芯片数据刷新一次 /=am end=/=main
12、start=void main()Si4730_Delay(250);Si4730_Power_Up_FM_AM_Choose(FM_RECEIVER); /默认选择fmwhile(1) if(!FM_AM_Choose) Si4730_Delay(100); if(!FM_AM_Choose) FM_AM_ = FM_AM_; if(!FM_AM_) Si4730_Power_Up_FM_AM_Choose(FM_RECEIVER); /fm选择 else if(FM_AM_) Si4730_Power_Up_FM_AM_Choose(AM_RECEIVER ); /am选择 if(!FM_
13、AM_) / ResetSi47XX_2w(); if(!KEY_UP) Si4730_Delay(100); if(!KEY_UP) Mode = HIGH; /向上搜台 Search_FM(); if(!KEY_DW) Si4730_Delay(100); if(!KEY_DW) Mode = LOW; /向下搜台 Search_FM(); else if(FM_AM_) / ResetSi47XX_2w(); if(!KEY_UP) Si4730_Delay(100); if(!KEY_UP) Mode = HIGH; /向上搜台 Search_AM(); if(!KEY_DW) Si4730_Delay(100); if(!KEY_DW) Mode = LOW; /向下搜台 Search_AM(); /=main end=
