lpc1114驱动RDA5820 FM收音机程序
rda5820.h文件:
#ifndef __RDA5820_H #define __RDA5820_H?? ? #define RDA5820_R00?? ??? ?0X00? //读出16个位的ID =0X5820 #define RDA5820_R02?? ??? ?0X02? //DHIZ[15],DMUTE[14],MONO[13],BASS[12],SEEKUP[9],SEEK[8],SKMODE[7],CLK_MODE[6:4],ANTENNA[2],SOFTRESET[1],ENABLE[0] #define RDA5820_R03?? ??? ?0X03? //CHAN[15:6],TUNE[4],BAND[3:2],SPACE[1:0] #define RDA5820_R04?? ??? ?0X04? //STCIEN[14](搜索完成中断),DE[11],I2S_ENABLE[6],GPIO3~1[5:0] #define RDA5820_R05?? ??? ?0X05? //INT_MODE[15],SEEKTH[14:8](设定信号强度),LNA_PORT_SEL[7:6],LNA_ICSEL_BIT[5:4],VOLUME[3:0]; #define RDA5820_R0A?? ??? ?0X0A? //STC[14](搜索完成标志),SF[13](搜索失败标志),ST[10](立体声标志),READCHAN[9:0](频率). #define RDA5820_R0B?? ??? ?0X0B? //RSSI[15:9](信号强度),FM_TRUE[8](站点标志),FM_READY[7](fm就绪标志) #define RDA5820_R40?? ??? ?0X40? //AUTO_SEEK[15](全/半自动搜台),CHAN_SCAN[14](搜空/忙台),CHIP_FUN[3:0](工作模式) #define RDA5820_R41?? ??? ?0X41? //MEM_CLR[15](内存清除),RPT_TIME[14:9](RDS应答次数),MEM_DEPTH[8:0](FIFO大小,最大256) #define RDA5820_R42?? ??? ?0X42? //TX_SIG_GAIN[10:8],TX_PA_GAIN[5:0](发射功率). #define RDA5820_R4A?? ??? ?0X4A? //MEM_INTMOD[4:0] #define RDA5820_R4B?? ??? ?0X4B? //CHAN_NUM[7:0](仅在全自动搜台有效,代表电台数量). #define RDA5820_R4C?? ??? ?0X4C? //TX_AUDIO_DEV[15:0] #define RDA5820_R4D?? ??? ?0X4D? //TX_PILOT_DEV[15:0] #define RDA5820_R4E?? ??? ?0X4E? //TX_RDS_DEV[15:0] #define RDA5820_R53?? ??? ?0X53? //CHAN_BOTTON[10:0](通道最低频率,100kHZ为单位) #define RDA5820_R54?? ??? ?0X54? //CHAN_TOP[10:0](通道最高频率,100kHZ为单位) #define RDA5820_R64?? ??? ?0X64? //RDS_RXMOD[4:3](FIFO模式[10]或者寄存器模式[11])?? ??? ? #define RDA5820_READ??? 0X23? //读RDA5820 #define RDA5820_WRITE?? ?0X22? //写RDA5820 uint8_t RDA5820_Init(void);?? ??? ??? ??? ??? ?//初始化?? ??? ? ?? ??? ??? ??? ??? ? void RDA5820_WR_Reg(uint8_t addr,uint16_t val);?? ?//写RDA5820寄存器 uint16_t RDA5820_RD_Reg(uint8_t addr);?? ??? ??? ?//读RDA5820寄存器 void RDA5820_RX_Mode(void);?? ??? ??? ??? ?//设置RDA5820为RX模式 void RDA5820_TX_Mode(void);?? ??? ??? ??? ?//设置RDA5820为TX模式 uint8_t RDA5820_Rssi_Get(void); void RDA5820_Mute_Set(uint8_t mute); void RDA5820_Rssi_Set(uint8_t rssi); void RDA5820_Vol_Set(uint8_t vol); void RDA5820_TxPAG_Set(uint8_t gain); void RDA5820_TxPGA_Set(uint8_t gain); void RDA5820_Band_Set(uint8_t band); void RDA5820_Space_Set(uint8_t spc); void RDA5820_Freq_Set(uint16_t freq); uint16_t RDA5820_Freq_Get(void); #endif
rda5820.c文件:
#include "lpc11xx.h" #include "rda5820.h" #include "i2c.h" //初始化 //0,初始化成功; //其他,初始化失败. uint8_t RDA5820_Init(void) { ?? ?uint16_t id; ?? ?I2C_Init();?? ??? ??? ??? ??? ??? ?//初始化I2C口?? ? ?? ?id=RDA5820_RD_Reg(RDA5820_R00);?? ?//读取ID =0X5805 ?? ?if(id==0X5805)?? ??? ??? ??? ??? ?//读取ID正确 ?? ?{ ?? ? ?? ?RDA5820_WR_Reg(RDA5820_R02,0x0002);?? ?//软复位 ?? ??? ?delay_ms(50); ?? ? ?? ?RDA5820_WR_Reg(RDA5820_R02,0xC001);?? ?//立体声,上电 ?? ??? ?delay_ms(600);?? ??? ??? ??? ??? ??? ?//等待时钟稳定 ?? ? ?? ?RDA5820_WR_Reg(RDA5820_R05,0X884F);?? ?//搜索强度8,LNAN,1.8mA,VOL最大 ??? ? ?? ?RDA5820_WR_Reg(0X07,0X7800);?? ??? ?// ?? ? ?? ?RDA5820_WR_Reg(0X13,0X0008);?? ??? ?// ?? ? ?? ?RDA5820_WR_Reg(0X15,0x1420);?? ??? ?//VCO设置? 0x17A0/0x1420 ?? ? ?? ?RDA5820_WR_Reg(0X16,0XC000);?? ??? ?// ? ?? ? ?? ?RDA5820_WR_Reg(0X1C,0X3126);?? ??? ?// ?? ? ?? ?RDA5820_WR_Reg(0X22,0X9C24);?? ??? ?//fm_true ?? ? ?? ?RDA5820_WR_Reg(0X47,0XF660) ;?? ??? ?//tx rds ??? ?}else return 1;//初始化失败 ?? ?return 0; } //写RDA5820寄存器?? ??? ??? ??? ??? ??? ? ?? ??? ??? ??? ??? ? void RDA5820_WR_Reg(uint8_t addr,uint16_t val) { ??? I2C_Start(); ? ?? ?I2C_Send_Byte(RDA5820_WRITE);?? ?//发送写命令? ??? ? ?? ?I2C_Wait_Ack();?? ?? ? ??? I2C_Send_Byte(addr);? ??? ??? ??? ?//发送地址 ?? ?I2C_Wait_Ack(); ?? ? ?? ??? ??? ??? ??? ??? ??? ??? ??? ??? ? ??? ??? ?? ? ?? ?I2C_Send_Byte(val>>8);??? ??? ??? ?//发送高字节?? ??? ??? ??? ??? ??? ??? ?? ? ?? ?I2C_Wait_Ack(); ??? ??? ??? ??? ?? ? ??? ?I2C_Send_Byte(val&0XFF);??? ??? ?//发送低字节?? ??? ??? ??? ??? ??? ??? ?? ? ??? ?I2C_Wait_Ack(); ??? ??? ??? ??? ?? ? ??? I2C_Stop();?? ??? ??? ??? ??? ??? ?//产生一个停止条件 ?? ? } //读RDA5820寄存器?? ? uint16_t RDA5820_RD_Reg(uint8_t addr) { ?? ?uint16_t res; ??? I2C_Start(); ?? ?I2C_Send_Byte(RDA5820_WRITE);?? ?//发送写命令? ??? ? ?? ?I2C_Wait_Ack();?? ?? ? ??? I2C_Send_Byte(addr);? ??? ??? ??? ?//发送地址 ?? ?I2C_Wait_Ack(); ?? ? ?? ??? ??? ??? ??? ??? ??? ??? ??? ??? ? ??? ??? ?? ? ??? I2C_Start(); ??? ??? ??? ?? ? ?? ?I2C_Send_Byte(RDA5820_READ);??? //发送读命令?? ??? ??? ??? ??? ??? ??? ?? ? ?? ?I2C_Wait_Ack(); ??? ??? ??? ??? ?? ? ??? ?res=I2C_Read_Byte(1);??? ??? ??? ?//读高字节,发送ACK?? ? ? ? ?? ?res<<=8; ? ?? ?res|=I2C_Read_Byte(0);??? ??? ??? ?//读低字节,发送NACK?? ??? ??? ??? ??? ??? ??? ?? ? ? ?? ?I2C_Stop();?? ??? ??? ??? ??? ??? ?//产生一个停止条件 ?? ?return res;?? ??? ??? ??? ??? ??? ?//返回读到的数据 } //设置RDA5820为RX模式 void RDA5820_RX_Mode(void) { ?? ?uint16_t temp; ?? ?temp=RDA5820_RD_Reg(0X40);?? ??? ?//读取0X40的内容 ?? ?temp&=0xfff0;?? ??? ??? ??? ??? ?//RX 模式? ? ?? ?RDA5820_WR_Reg(0X40,temp) ;?? ??? ?//FM RX模式 }?? ??? ??? ? //设置RDA5820为TX模式 void RDA5820_TX_Mode(void) { ?? ?uint16_t temp; ?? ?temp=RDA5820_RD_Reg(0X40);?? ??? ?//读取0X40的内容 ?? ?temp&=0xfff0; ?? ?temp|=0x0001;?? ??? ??? ??? ???? //TX 模式 ?? ?RDA5820_WR_Reg(0X40,temp) ;?? ??? ?//FM TM 模式 } //得到信号强度 //返回值范围:0~127 uint8_t RDA5820_Rssi_Get(void) { ?? ?uint16_t temp; ?? ?temp=RDA5820_RD_Reg(0X0B);?? ??? ?//读取0X0B的内容 ?? ?return temp>>9;???????????????? //返回信号强度 } //设置音量ok //vol:0~15; void RDA5820_Vol_Set(uint8_t vol) { ?? ?uint16_t temp; ?? ?temp=RDA5820_RD_Reg(0X05);?? ??? ?//读取0X05的内容 ?? ?temp&=0XFFF0; ?? ?temp|=vol&0X0F;?? ??? ??? ??? ?? ??? ??? ? ?? ?RDA5820_WR_Reg(0X05,temp) ;?? ??? ?//设置音量?? ? } //静音设置 //mute:0,不静音;1,静音 void RDA5820_Mute_Set(uint8_t mute) { ?? ?uint16_t temp; ?? ?temp=RDA5820_RD_Reg(0X02);?? ??? ?//读取0X02的内容 ?? ?if(mute)temp|=1<<14; ?? ?else temp&=~(1<<14);?? ??? ??? ??? ?? ??? ??? ? ?? ?RDA5820_WR_Reg(0X02,temp) ;?? ??? ?//设置MUTE?? ? } //设置灵敏度 //rssi:0~127; void RDA5820_Rssi_Set(uint8_t rssi) { ?? ?uint16_t temp; ?? ?temp=RDA5820_RD_Reg(0X05);?? ??? ?//读取0X05的内容 ?? ?temp&=0X80FF; ?? ?temp|=(uint16_t)rssi<<8;?? ??? ??? ??? ?? ??? ??? ? ?? ?RDA5820_WR_Reg(0X05,temp) ;?? ??? ?//设置RSSI?? ? } //设置TX发送功率 //gain:0~63 void RDA5820_TxPAG_Set(uint8_t gain) { ?? ?uint16_t temp; ?? ?temp=RDA5820_RD_Reg(0X42);?? ??? ?//读取0X42的内容 ?? ?temp&=0XFFC0; ?? ?temp|=gain;?? ??? ??? ??? ?? ??? ??? ?//GAIN ?? ?RDA5820_WR_Reg(0X42,temp) ;?? ??? ?//设置PA的功率 } //设置TX 输入信号增益 //gain:0~7 void RDA5820_TxPGA_Set(uint8_t gain) { ?? ?uint16_t temp; ?? ?temp=RDA5820_RD_Reg(0X42);?? ??? ?//读取0X42的内容 ?? ?temp&=0XF8FF; ?? ?temp|=gain<<8;?? ??? ??? ??? ??? ?//GAIN ?? ?RDA5820_WR_Reg(0X42,temp) ;?? ??? ?//设置PGA } //设置RDA5820的工作频段 //band:0,87~108Mhz;1,76~91Mhz;2,76~108Mhz;3,用户自定义(53H~54H) void RDA5820_Band_Set(uint8_t band) { ?? ?uint16_t temp; ?? ?temp=RDA5820_RD_Reg(0X03);?? ??? ?//读取0X03的内容 ?? ?temp&=0XFFF3; ?? ?temp|=band<<2;?? ??? ??? ???? ? ?? ?RDA5820_WR_Reg(0X03,temp) ;?? ??? ?//设置BAND } //设置RDA5820的步进频率 //band:0,100Khz;1,200Khz;3,50Khz;3,保留 void RDA5820_Space_Set(uint8_t spc) { ?? ?uint16_t temp; ?? ?temp=RDA5820_RD_Reg(0X03);?? ??? ?//读取0X03的内容 ?? ?temp&=0XFFFC; ?? ?temp|=spc;?? ??? ??? ???? ? ?? ?RDA5820_WR_Reg(0X03,temp) ;?? ??? ?//设置BAND } //设置RDA5820的频率 //freq:频率值(单位为10Khz),比如10805,表示108.05Mhz void RDA5820_Freq_Set(uint16_t freq) { ?? ?uint16_t temp; ?? ?uint8_t spc=0,band=0; ?? ?uint16_t fbtm,chan; ?? ?temp=RDA5820_RD_Reg(0X03);?? ?//读取0X03的内容 ?? ?temp&=0X001F; ?? ?band=(temp>>2)&0x03;?? ??? ?//得到频带 ?? ?spc=temp&0x03; ?? ??? ??? ??? ?//得到分辨率 ?? ?if(spc==0)spc=10; ?? ?else if(spc==1)spc=20; ?? ?else spc=5; ?? ?if(band==0)fbtm=8700; ?? ?else if(band==1||band==2)fbtm=7600; ?? ?else ?? ?{ ?? ??? ?fbtm=RDA5820_RD_Reg(0X53);//得到bottom频率 ?? ??? ?fbtm*=10; ?? ?} ?? ?if(freq<fbtm)return; ?? ?chan=(freq-fbtm)/spc;?? ??? ?//得到CHAN应该写入的值 ?? ?chan&=0X3FF;?? ??? ??? ??? ?//取低10位?? ? ? ?? ?temp|=chan<<6; ?? ?temp|=1<<4;?? ??? ??? ??? ??? ?//TONE ENABLE?? ??? ??? ???? ? ?? ?RDA5820_WR_Reg(0X03,temp) ;?? ?//设置频率 ?? ?delay_ms(20);?? ??? ??? ??? ?//等待20ms ?? ?while((RDA5820_RD_Reg(0X0B)&(1<<7))==0);//等待FM_READY } //得到当前频率 //返回值:频率值(单位10Khz) uint16_t RDA5820_Freq_Get(void) { ?? ?uint16_t temp; ?? ?uint8_t spc=0,band=0; ?? ?uint16_t fbtm,chan; ?? ?temp=RDA5820_RD_Reg(0X03);?? ??? ?//读取0X03的内容 ?? ?chan=temp>>6;? ? ?? ?band=(temp>>2)&0x03;?? ??? ?//得到频带 ?? ?spc=temp&0x03; ?? ??? ??? ??? ?//得到分辨率 ?? ?if(spc==0)spc=10; ?? ?else if(spc==1)spc=20; ?? ?else spc=5; ?? ?if(band==0)fbtm=8700; ?? ?else if(band==1||band==2)fbtm=7600; ?? ?else ?? ?{ ?? ??? ?fbtm=RDA5820_RD_Reg(0X53);//得到bottom频率 ?? ??? ?fbtm*=10; ?? ?} ??? ?temp=fbtm+chan*spc;?? ??? ??? ??? ? ?? ?return temp;//返回频率值 }
main.c文件:
#include "lpc11xx.h" #include "ili9325.h" #include "w25q16.h" #include "rda5820.h" #define KEY1_DOWN (LPC_GPIO1->DATA&(1<<9))!=(1<<9) #define KEY2_DOWN (LPC_GPIO1->DATA&(1<<10))!=(1<<10) int main() { ?? ?uint16_t freqset=0; ?? ?uint8_t i,rssi; ?? ? ?? ?LCD_Init(); ?? ?LCD_Clear(WHITE); ?? ?W25Q16_Init();?? ??? // 初始化字库芯片W25Q16 ?? ?LCD_ShowString(20, 5, "START"); ?? ?delay_ms(600); ?? ?LCD_ShowString(20, 5, "???? "); ?? ?if(RDA5820_Init()==0) ?? ?{ ?? ??? ?LCD_ShowString(20, 5, "OK"); ?? ?} ?? ?else ?? ?{ ?? ??? ?LCD_ShowString(20, 5, "NO"); ?? ?} ?? ? ?? ?RDA5820_Band_Set(0);?? ?//设置频段为87~108Mhz ?? ?RDA5820_Space_Set(0);?? ?//设置步进为100Khz ?? ?RDA5820_TxPGA_Set(3);?? ?//信号增益设置为3 ?? ?RDA5820_TxPAG_Set(63);?? ?//发射功率为最大. ?? ?RDA5820_RX_Mode();?? ??? ?//设置为接收模式 ? ?? ? ?? ?freqset=8800;?? ??? ??? ??? ?//默认为88Mhz ?? ?RDA5820_Freq_Set(freqset);?? ?//设置频率 ?? ? ?? ?while(1) ?? ?{ ?? ??? ?if(KEY1_DOWN) ?? ??? ?{ ?? ??? ??? ?delay_ms(30); ?? ??? ??? ?if(KEY1_DOWN) ?? ??? ??? ?{ ?? ??? ??? ??? ?if(freqset>8700)freqset-=10; ?? ??? ??? ??? ?LCD_ShowNum(100,30,freqset,5); ?? ??? ??? ??? ?RDA5820_Freq_Set(freqset);?? ?//设置频率 ?? ??? ??? ?} ?? ??? ?} ?? ??? ?else if(KEY2_DOWN) ?? ??? ?{ ?? ??? ??? ?delay_ms(30); ?? ??? ??? ?if(KEY2_DOWN) ?? ??? ??? ?{ ?? ??? ??? ??? ?if(freqset<10800)freqset+=10; ?? ??? ??? ??? ?LCD_ShowNum(100,30,freqset,5); ?? ??? ??? ??? ?RDA5820_Freq_Set(freqset);?? ?//设置频率 ?? ??? ??? ?} ?? ??? ?} ?? ??? ?i++; ?? ??? ?delay_ms(10);?? ? ? ?? ??? ?if(i==200)//每两秒左右检测一次信号强度信息 ?? ??? ?{ ?? ??? ??? ?i=0; ?? ??? ??? ?rssi=RDA5820_Rssi_Get();?? ??? ??? ??? ?//得到信号强度 ?? ??? ??? ?LCD_ShowNum(100,230,rssi,3);?? ??? ??? ?//显示信号强度 ?? ??? ?} ?? ?} }