用msp430单片机和RDA5807实现收音机的原理图、代码.doc

RDA5807的MSP430代码、原理图说明：这是我用MSP430G2553单片机实现RDA5807收音芯片实现自动搜台收音机功能的代码（附原理图）。这个收音机有两个按键，一个用于向上搜台，另一个用于向下搜台。用耳机做天线。本文档包含三个C文件和两个H文件（见下表）MAIN.C主程序INITG2553.CMSP430G2553的初始化代码（有些在这个工程中没用到）G2553I2C.CMSP430G2553的I2C代码（有些在这个工程中没用到）G2553I2C.HG2553I2C.C中函数的头文件INITG2553.HINITG2553.C中函数的头文件亲测能用，工作正常，在这里与大家分享。目录MAIN.C3INITG2553.C6G2553I2C.C8G2553I2C.H12INITG2553.H13原理图14MAIN.C#include #include InitG2553.H#include G2553I2C.H/* * main.c */#defineCHIP_ADDR_STD0x11#defineCHIP_ADDR_SQE0x10#define REG020x02#define REG030x03#define REG0A0x0A#define REG0B0x0B#define R02_SEEK0x0100#define R02_SEEKUP0x0200#define R03_TUNE0x0010#define R0A_STC0x4000#define R0A_SF0x2000void RDA5807_init();unsigned int RDA5807_seek();unsigned int RDA5807_readfreq();unsigned int RDA5807_readRSSI();int freq;int rssi;int main(void) unsigned int i;volatile unsigned int R0a,R0b; WDTCTL = WDTPW | WDTHOLD;/ Stop watchdog timer init_clk(); init_I2C(); init_IO(); RDA5807_init(); _BIS_SR(GIE); while(1);return 0;/ Port 1 interrupt service routine#pragma vector=PORT1_VECTOR_interrupt void Port_1(void)unsigned int i;unsigned int reg02_temp;for(i=0; i=60000; i+);for(i=0; i=60000; i+);if(P1IFG & BIT4)/S2按下P1IFG=0;if(P1IN & BIT4) return;/向上调台reg02_temp=ReadI2C_ADDR_WORD(CHIP_ADDR_STD, REG02);reg02_temp |= R02_SEEKUP;WriteI2C_ADDR_WORD(CHIP_ADDR_STD, REG02, reg02_temp);freq=RDA5807_seek();rssi=RDA5807_readRSSI();return;if(P1IFG & BIT5)/S3按下P1IFG=0;if(P1IN & BIT5) return;/向下调台reg02_temp=ReadI2C_ADDR_WORD(CHIP_ADDR_STD, REG02);reg02_temp &= R02_SEEKUP;WriteI2C_ADDR_WORD(CHIP_ADDR_STD, REG02, reg02_temp);freq=RDA5807_seek();rssi=RDA5807_readRSSI();return;void RDA5807_init()unsigned int i;for(i=0; i=60000; i+);for(i=0; i=60000; i+);for(i=0; i=60000; i+);for(i=0; i=60000; i+);WriteI2C_ADDR_WORD(CHIP_ADDR_STD, 0x02, 0x0002);for(i=0; i=60000; i+);WriteI2C_ADDR_WORD(CHIP_ADDR_STD, 0x02, 0xC201);for(i=0; i=60000; i+);WriteI2C_ADDR_WORD(CHIP_ADDR_STD, 0x03, 0x0000);WriteI2C_ADDR_WORD(CHIP_ADDR_STD, 0x04, 0x0400);WriteI2C_ADDR_WORD(CHIP_ADDR_STD, 0x05, 0x86B0);RDA5807_seek();unsigned int RDA5807_seek()unsigned int i;unsigned int reg02_temp;unsigned int reg03_temp;unsigned int reg0a_temp;/清除调谐位reg03_temp=ReadI2C_ADDR_WORD(CHIP_ADDR_STD, REG03);reg03_temp &= R03_TUNE;WriteI2C_ADDR_WORD(CHIP_ADDR_STD, REG03, reg03_temp);/置seek位reg02_temp=ReadI2C_ADDR_WORD(CHIP_ADDR_STD, REG02);reg02_temp |= R02_SEEK;WriteI2C_ADDR_WORD(CHIP_ADDR_STD, REG02, reg02_temp);/开始搜台dofor(i=0; i= 9;return rssi;INITG2553.C/* * InitG2553.c * * Created on: 2014-6-23 * Author: Huaqing * 修订于2015年4月5日 */ /* * 适用于MSP430G2553的初始化代码 */ #include void init_clk() if (CALBC1_16MHZ=0xFF)/ If calibration constant erased while(1); / do not load, trap CPU! DCOCTL = 0; / Select lowest DCOx and MODx settings BCSCTL1 = CALBC1_16MHZ; / Set DCO DCOCTL = CALDCO_16MHZ;/DCO频率16MHz/ BCSCTL2 |= DIVS_2;/将SMCLK4分频,4MHzvoid init_TA()TA0CTL=TASSEL_2+MC_1+TAIE;/TASSEL_2表示时钟源是SMCLK，MC_1表示UP模式，TAIE开中断TA0CCR0=800;/设定这个值是中断设为20kHzP1DIR |= BIT6;P1SEL |= BIT6;/将PWM从P1.6引出TA0CCTL1 = OUTMOD_7;TA0CCR1=200;TA1CTL=TASSEL_2+MC_1;/TASSEL_2表示时钟源是SMCLK，MC_1表示UP模式，TAIE开中断TA1CCR0=800;/设定这个值是中断设为20kHzP2DIR |= BIT1;P2SEL |= BIT1;/将PWM从P2.1引出TA1CCTL1 = OUTMOD_7;TA1CCR1=200;void init_I2C()P1SEL |= BIT6 + BIT7; / Assign I2C pins to USCI_B0P1SEL2|= BIT6 + BIT7; / Assign I2C pins to USCI_B0/初始化引脚功能，P1.6是SCL，P1.7是SDAUCB0CTL1 |= UCSWRST; / Enable SW resetUCB0CTL0 = UCMST + UCMODE_3 + UCSYNC; / I2C Master, synchronous modeUCB0CTL1 = UCSSEL_2 + UCSWRST; / Use SMCLK, keep SW resetUCB0BR0=160;UCB0BR1=0;/设定分频UCB0CTL1 &= UCSWRST; / Clear SW reset, resume operationvoid init_IO()P1DIR&=(BIT3+BIT4+BIT5);/P1.345用作按键输入P1REN|=(BIT3+BIT4+BIT5);P1OUT|=(BIT3+BIT4+BIT5);/设定P1.345上拉P1IE|=(BIT3+BIT4+BIT5);/使能P1.345的中断P1IES|=(BIT3+BIT4+BIT5);/P1.345下降沿触发中断P1IFG = 0;P2DIR |= BIT1+BIT2;/testG2553I2C.C/* * i2c.c * * Created on: 2014-6-28 * Author: Huaqing * 修订于2015年4月5日 */#include void WriteI2C1(int devaddr,unsigned char data)UCB0CTL1|=UCTR;/发送模式UCB0I2CSA=devaddr;/地址UCB0CTL1|=UCTXSTT;/起始位while(!(IFG2 & UCB0TXIFG);/在发送中断产生后写缓存UCB0TXBUF=data;while(!(IFG2 & UCB0TXIFG);/在中断标志产生前不能发送停止位UCB0CTL1|=UCTXSTP;/发送停止位IFG2 &= UCB0TXIFG;/清除中断标志位unsigned char ReadI2C1(int devaddr)UCB0CTL1&=UCTR;/接收模式UCB0I2CSA=devaddr;/地址UCB0CTL1|=UCTXSTT;while(UCB0CTL1 & UCTXSTT);UCB0CTL1|=UCTXSTP;/发送停止位while(!(IFG2 & UCB0RXIFG);IFG2 &= UCB0TXIFG;/中断标志位复位return UCB0RXBUF;void WriteI2C_ADDR_BYTE(int addr,unsigned char regaddr,unsigned char data)int n=2;UCB0CTL1|=UCTR;/发送模式UCB0I2CSA=addr;/地址UCB0CTL1|=UCTXSTT;/起始位while(n)if(IFG2 & UCB0TXIFG)if(n=2)UCB0TXBUF=regaddr;if(n=1)UCB0TXBUF=data;while(!(IFG2 & UCB0TXIFG);/在中断标志产生前不能发送停止位UCB0CTL1|=UCTXSTP;/发送停止位IFG2 &= UCB0TXIFG;/清除中断标志位n-;void WriteI2C_ADDR_WORD(unsigned char addr,unsigned char regaddr,unsigned int data)UCB0CTL1|=UCTR;/发送模式UCB0I2CSA=addr;/地址UCB0CTL1|=UCTXSTT;/起始位/发送寄存器地址while(!(IFG2 & UCB0TXIFG);/等待中断，中断标志位表示可以向UCB0TXBUF中写入数据IFG2 &= UCB0TXIFG;UCB0TXBUF=regaddr;/发送高字节while(!(IFG2 & UCB0TXIFG);/等待中断，中断标志位表示可以向UCB0TXBUF中写入数据IFG2 &= UCB0TXIFG;UCB0TXBUF=(data8);/发送低字节while(!(IFG2 & UCB0TXIFG);/等待中断，中断标志位表示可以向UCB0TXBUF中写入数据IFG2 &= UCB0TXIFG;UCB0TXBUF=(data & 0x00FF);/发送停止位while(!(IFG2 & UCB0TXIFG);/在中断标志产生前不能发送停止位UCB0CTL1|=UCTXSTP;/发送停止位IFG2 &= UCB0TXIFG;/清除中断标志位void ReadI2C(int devaddr,unsigned char regaddr, unsigned char * dataarray, int n)/*UCB0CTL1|=UCTR;/发送模式UCB0I2CSA=addr;/地址UCB0CTL1|=UCTXSTT;/起始位/先发送一个寄存器地址UCB0TXBUF=regaddr;while(!(IFG2 & UCB0TXIFG);/在中断标志产生前不能发送停止位UCB0CTL1|=UCTXSTP;/发送停止位IFG2 &= UCB0TXIFG;/清除中断标志位UCB0CTL1&=UCTR;/接收模式UCB0CTL1|=UCTXSTT;while(UCB0CTL1 & UCTXSTT);UCB0CTL1|=UCTXSTP;/发送停止位while(!(IFG2 & UCB0RXIFG);IFG2 &= UCB0TXIFG;/中断标志位复位*/int iN=n;WriteI2C1(devaddr, regaddr);UCB0CTL1&=UCTR;/接收模式UCB0I2CSA=devaddr;/地址UCB0CTL1|=UCTXSTT;/发送起始位、芯片地址while(n)if(n=1) UCB0CTL1|=UCTXSTP;/发送停止位while(!(IFG2 & UCB0RXIFG);dataarrayiN-n=UCB0RXBUF;IFG2 &= UCB0TXIFG;n-;unsigned int ReadI2C_ADDR_WORD(unsigned char devaddr,unsigned char regaddr)unsigned int i=0;UCB0CTL1|=UCTR;/发送模式UCB0I2CSA=devaddr;/地址UCB0CTL1|=UCTXSTT;/起始位/发送寄存器地址while(!(IFG2 & UCB0TXIFG);UCB0TXBUF=regaddr;/发送转接收while(!(IFG2 & UCB0TXIFG);/确保发送已经完成UCB0CTL1&=UCTR;/接收模式IFG2 &= UCB0TXIFG;/清除中断标志位UCB0CTL1|=UCTXSTT;/发送起始位的同时还发送器件地址/接收高位while(!(IFG2 & UCB0RXIFG);IFG2 &= UCB0RXIFG;/中断标志位复位i |= UCB0RXBUF;i =8;UCB0CTL1 |=