SI4730 收音机芯片资料与程序.doc

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：sws SI4730资料下载地址：/file/f6de4b58f*/ #includereg52.h#includeintrins.h typedef unsigned char uchar;typedef unsigned int uint;#define HIGH 1#define LOW 0#define SI4730_HIGH??? //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=875;uint Frequency_am=531; bit Mode = 0;sbit KEY_UP = P2^2;?? //向上搜台sbit KEY_DW = P2^3;?? //向下搜台sbit FM_AM_Choose = P2^4; //FM与AM选择bit FM_AM_ = 0; /******************************************************START condition: SCLK: |______?????? SDIO:|_____________?????? 1 |?? 2 | 3 STOP condition: SCLK: ____|?????? SDIO:____________|1 | 2?? |?? 3 DATA: SCLK:_______________||________||_______?????? SDIO:___________||____________|?? |==========| RESET: SENB:__|SDIO:_________________________________________|RST: ___________|SCLK:__|?????? |??? 1??? |????? 2??????? ?????? |?? 3 ******************************************************/sbit Si4730_Reset = P1^3;sbit Si4730_SCLK = P1^2;sbit Si4730_SDIO = P1^1; //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 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=150;