NRF24L01无线通讯8051驱动程序.doc

/=/ 工程名称: NRF24L01无线通讯8051驱动程序 / 硬件连接: NRF24L01无线通讯模块和8051单片机 /=嘉兴学院电子创新实验室2012年=#include #include typedef unsigned char uchar;typedef unsigned int uint;/*IO端口定义*sbit MISO=P20;sbit MOSI=P21;sbitSCK =P22;sbitCE =P23;sbitCSN=P24;sbitIRQ=P22;/*定义待发数据宽度和内容*#define TX_PLOAD_WIDTH 1 / 1 uchar TX payload#define RX_PLOAD_WIDTH 1 / 1 uchar TX payloaduchar TxBuf1=0xaa;uchar RxBuf1;/*定义NRF24L01通讯地址宽度和内容*#define TX_ADR_WIDTH 5 / 5 uchar TX address width#define RX_ADR_WIDTH 5 / 5 uchar RX address widthuchar const TX_ADDRESSTX_ADR_WIDTH= 0x34,0x43,0x10,0x10,0x01;/本地地址uchar const RX_ADDRESSRX_ADR_WIDTH= 0x34,0x43,0x10,0x10,0x01;/接收端地址/*NRF24L01寄存器指令*#define READ_REG 0x00 / 读寄存器指令#define WRITE_REG 0x20 / 写寄存器指令#define RD_RX_PLOAD 0x61 / 读取接收数据指令#define WR_TX_PLOAD 0xA0 / 写入待发数据指令#define FLUSH_TX 0xE1 / 冲洗发送 FIFO指令#define FLUSH_RX 0xE2 / 冲洗接收 FIFO指令#define REUSE_TX_PL 0xE3 / 定义重复装载数据指令#define NOP 0xFF / 保留/*SPI(nRF24L01)寄存器地址*#define CONFIG 0x00 / 配置收发状态，CRC校验模式以及收发状态响应方式#define EN_AA 0x01 / 自动应答功能设置#define EN_RXADDR 0x02 / 可用信道设置#define SETUP_AW 0x03 / 收发地址宽度设置#define SETUP_RETR 0x04 / 自动重发功能设置#define RF_CH 0x05 / 工作频率设置#define RF_SETUP 0x06 / 发射速率、功耗功能设置#define STATUS 0x07 / 状态寄存器#define OBSERVE_TX 0x08 / 发送监测功能#define CD 0x09 / 地址检测 #define RX_ADDR_P0 0x0A / 频道0接收数据地址#define RX_ADDR_P1 0x0B / 频道1接收数据地址#define RX_ADDR_P2 0x0C / 频道2接收数据地址#define RX_ADDR_P3 0x0D / 频道3接收数据地址#define RX_ADDR_P4 0x0E / 频道4接收数据地址#define RX_ADDR_P5 0x0F / 频道5接收数据地址#define TX_ADDR 0x10 / 本地地址寄存器#define RX_PW_P0 0x11 / 接收频道0接收数据长度#define RX_PW_P1 0x12 / 接收频道0接收数据长度#define RX_PW_P2 0x13 / 接收频道0接收数据长度#define RX_PW_P3 0x14 / 接收频道0接收数据长度#define RX_PW_P4 0x15 / 接收频道0接收数据长度#define RX_PW_P5 0x16 / 接收频道0接收数据长度#define FIFO_STATUS 0x17 / FIFO栈入栈出状态寄存器设置/*void Delay(uint s);/长延时void inerDelay_us(uchar n);/延时void init_NRF24L01(void);/初始化uchar SPI_RW(uchar uchar_data);/SPI读写数据uchar SPI_Read(uchar reg);/SPI读寄存器void SPI_RW_Reg(uchar reg, uchar value);/SPI写寄存器void SPI_Read_Buf(uchar reg, uchar *pBuf, uchar uchars);/SPI读多字节数据void SPI_Write_Buf(uchar reg, uchar *pBuf, uchar uchars);/SPI写多字节数据void SetRX_Mode(void);/数据接收设置void SetTX_Mode(void);/数据发送设置void nRF24L01_RxPacket(uchar* rx_buf);/接收数据函数void nRF24L01_TxPacket(uchar * tx_buf);/发送数据函数/*uchar bdata sta; /状态标志sbitRX_DR =sta6;sbitTX_DS =sta5;sbitMAX_RT =sta4;/*长延时*void Delay(uint s)uint i,j;for(i=0; is; i+)for(j=0; j0;n-)_nop_();/*/*NRF24L01初始化/*void init_NRF24L01(void) inerDelay_us(100); CE=0; / StandBy I模式 CSN=1; / Spi disable SCK=0; / Spi clock line init lowSPI_RW_Reg(WRITE_REG + CONFIG, 0x5e); /IRQ发送完成中断响应，主发送SPI_RW_Reg(WRITE_REG + EN_AA, 0x00); /允许频道0自动应答SPI_RW_Reg(WRITE_REG + EN_RXADDR, 0x01); /允许接收地址只有频道0 /SPI_RW_Reg(WRITE_REG + SETUP_AW, 0x01); /设置接收地址长度，本次设置为3字节/SPI_RW_Reg(WRITE_REG + SETUP_RETR, 0x00);/设置禁止自动重发SPI_RW_Reg(WRITE_REG + RF_CH, 0x02); /设置信道工作频率，收发必须一致SPI_RW_Reg(WRITE_REG + RF_SETUP, 0x0f); /设置发射速率为2MHZ，发射功率为最大值0dBSPI_Write_Buf(WRITE_REG + RX_ADDR_P0, RX_ADDRESS, RX_ADR_WIDTH); /写接收端地址SPI_Write_Buf(WRITE_REG + TX_ADDR, TX_ADDRESS, TX_ADR_WIDTH); /写本地地址SPI_RW_Reg(WRITE_REG + RX_PW_P0, RX_PLOAD_WIDTH); /设置接收数据长度，本次设置为1字节inerDelay_us(150);/*/*函数：uint SPI_RW(uint uchar_data)/*功能：NRF24L01的SPI读写数据/*uchar SPI_RW(uchar uchar_data) uchar bit_ctr; for(bit_ctr=0;bit_ctr8;bit_ctr+) / output 8-bit MOSI = (uchar_data & 0x80); / output uchar_data, MSB to MOSIuchar_data = (uchar_data 1); / shift next bit into MSB.SCK = 1; / Set SCK high.uchar_data |= MISO; / capture current MISO bitSCK = 0; / .then set SCK low again return(uchar_data); / return read uchar_data/*/*函数：uchar SPI_Read(uchar reg)/*功能：NRF24L01的SPI读寄存器and clear/*uchar SPI_Read(uchar reg)uchar reg_val;CSN = 0; / CSN low, initialize SPI communication.SPI_RW(reg); / Select register to read from.reg_val = SPI_RW(0); / .then read registervalueCSN = 1; / CSN high, terminate SPI communicationreturn(reg_val); / return register value/*/*函数：uint SPI_RW_Reg(uchar reg, uchar value)/*功能：NRF24L01的SPI写寄存器函数，返回status/*void SPI_RW_Reg(uchar reg, uchar value)CSN = 0; / CSN low, init SPI transaction SPI_RW(reg); / select registerSPI_RW(value); / .and write value to it.CSN = 1; / CSN high again/*/*函数：uint SPI_Read_Buf(uchar reg, uchar *pBuf, uchar uchars)/*功能: 用于读数据，reg：指令+为寄存器地址，pBuf：为待读出数据地址，uchars：读出数据的个数/*void SPI_Read_Buf(uchar reg, uchar *pBuf, uchar uchars)uchar uchar_ctr;CSN = 0; / Set CSN low, init SPI tranactionSPI_RW(reg); / Select register to write to and read status ucharfor(uchar_ctr=0;uchar_ctruchars;uchar_ctr+)pBufuchar_ctr = SPI_RW(0); CSN = 1; /*/*函数：uint SPI_Write_Buf(uchar reg, uchar *pBuf, uchar uchars)/*功能: 用于写数据，reg：为指令+寄存器地址，pBuf：为待写入数据地址，uchars：写入数据的个数/*void SPI_Write_Buf(uchar reg, uchar *pBuf, uchar uchars)uchar uchar_ctr;CSN = 0; /SPI使能 SPI_RW(reg); for(uchar_ctr=0; uchar_ctruchars; uchar_ctr+) SPI_RW(*pBuf+);CSN = 1; /关闭SPI/*/*函数：void SetRX_Mode(void)/*功能：数据接收配置 /*void SetRX_Mode(void)CE=0;SPI_RW_Reg(WRITE_REG + CONFIG, 0x3f); / IRQ接收完成中断响应，主接收CE = 1; inerDelay_us(130);/*/*函数：void SetTX_Mode(void)/*功能：数据发送配置 /*void SetTX_Mode(void)CE=0;SPI_RW_Reg(WRITE_REG + CONFIG, 0x7e); / IRQ禁止中断响应，主发送/*/*函数：void nRF24L01_RxPacket(unsigned char* rx_buf)/*功能：读取RX_FIFO数据，然后存入自定义数组中/*void nRF24L01_RxPacket(uchar* rx_buf)SPI_Read_Buf(RD_RX_PLOAD,rx_buf,TX_PLOAD_WIDTH);/ read receive payload from RX_FIFO bufferCE=0; SPI_RW_Reg(WRITE_REG+STATUS,0x70); /接收到数据后RX_DR置高为1，通过写1来清楚中断标志SPI_RW(FLUSH_RX); / 冲洗接收 FIFO指令 CE=1;inerDelay_us(130);/*/*函数：void nRF24L01_TxPacket(