nrf24l01参考程序%28包含多个实例%29

（相关人员如觉得本人水平低下，还请见谅）Nrf24L01 的使用程序和使用方法和简单操作：功能：无线对发程序。两个模块 a，b，实现按下一个按键，会在对方的数码管上显示 3 或 4，在本机上显示 1,2。当一个模块，比如 a 模块。当两个按键按下其中一个，则会在另一个模块 b 上显示数字3,4（具体根据按下哪个按键） 。以上功能描述，B 模块按键按下，如同 a 模块一样的功能，不做系统性描述了。下面给出程序中几个地方的解释：#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 / 保留类似这种的描述，可以等同于 READ_REG =0x00； 这个是经过实际程序测试出来的，比如以下程序：#include#define k 0xfevoid main()P1=k;则会出现此类结果：MOSI = (uchar / output uchar, MSB to MOSIuchar = (uchar #include typedef unsigned char uchar;typedef unsigned char uint;/*NRF24L01 端口定义*sbit MISO =P13;sbit MOSI =P14;sbit SCK =P12;sbit CE =P11;sbit CSN =P32;sbit IRQ =P33;/*按键*sbit KEY1=P36;sbit KEY2=P37;/*数码管位选*sbit led3=P20;sbit led2=P21;sbit led1=P22;sbit led0=P23;/*蜂明器*sbit BELL=P34;/*数码管 0-9 编码*uchar seg10=0xC0,0xCF,0xA4,0xB0,0x99,0x92,0x82,0xF8,0x80,0x90; /09 段码/*NRF24L01*#define TX_ADR_WIDTH 5 / 5 uints TX address width#define RX_ADR_WIDTH 5 / 5 uints RX address width#define TX_PLOAD_WIDTH 20 / 20 uints TX payload#define RX_PLOAD_WIDTH 20 / 20 uints TX payloaduint const TX_ADDRESSTX_ADR_WIDTH= 0x34,0x43,0x10,0x10,0x01; /本地地址uint const RX_ADDRESSRX_ADR_WIDTH= 0x34,0x43,0x10,0x10,0x01; /接收地址/*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 / 发送地址寄存器#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(unsigned int s);void inerDelay_us(unsigned char n);void init_NRF24L01(void);uint SPI_RW(uint uchar);uchar SPI_Read(uchar reg);void SetRX_Mode(void);uint SPI_RW_Reg(uchar reg, uchar value);uint SPI_Read_Buf(uchar reg, uchar *pBuf, uchar uchars);uint SPI_Write_Buf(uchar reg, uchar *pBuf, uchar uchars);unsigned char nRF24L01_RxPacket(unsigned char* rx_buf);void nRF24L01_TxPacket(unsigned char * tx_buf);/*长延时*void Delay(unsigned int s)unsigned int i;for(i=0; i0;n-)_nop_();/*/*NRF24L01 初始化/*/void init_NRF24L01(void)inerDelay_us(100);CE=0; / chip enableCSN=1; / Spi disable SCK=0; / SPI_Write_Buf(WRITE_REG + TX_ADDR, TX_ADDRESS, TX_ADR_WIDTH); / 写本地地址SPI_Write_Buf(WRITE_REG + RX_ADDR_P0, RX_ADDRESS, RX_ADR_WIDTH); / 写接收端地址SPI_RW_Reg(WRITE_REG + EN_AA, 0x01); / 频道 0 自动 ACK 应答允许SPI_RW_Reg(WRITE_REG + EN_RXADDR, 0x01); / 允许接收地址只有频道 0，如果需要多频道可以参考 Page21 SPI_RW_Reg(WRITE_REG + RF_CH, 0); / 设置信道工作为 2.4GHZ，收发必须一致SPI_RW_Reg(WRITE_REG + RX_PW_P0, RX_PLOAD_WIDTH); /设置接收数据长度，本次设置为 32 字节SPI_RW_Reg(WRITE_REG + RF_SETUP, 0x07); /设置发射速率为 1MHZ，发射功率为最大值 0dB/*/*函数：uint SPI_RW(uint uchar)/*功能：NRF24L01 的 SPI 写时序/*/uint SPI_RW(uint uchar)uint bit_ctr;for(bit_ctr=0;bit_ctr8;bit_ctr+) / output 8-bitMOSI = (uchar / output uchar, MSB to MOSIuchar = (uchar 1); / shift next bit into MSBSCK = 1; / Set SCK highuchar |= MISO; / capture current MISO bitSCK = 0; / then set SCK low againreturn(uchar); / return read uchar/*/*函数：uchar SPI_Read(uchar reg)/*功能：NRF24L01 的 SPI 时序/*/uchar SPI_Read(uchar reg)uchar reg_val;CSN = 0; / CSN low, initialize SPI communication.SPI_RW(reg); / Select register to read fromreg_val = SPI_RW(0); / then read registervalueCSN = 1; / CSN high, terminate SPI communicationreturn(reg_val); / return register value/*/*功能：NRF24L01 读写寄存器函数/*/uint SPI_RW_Reg(uchar reg, uchar value)uint status;CSN = 0; / CSN low, init SPI transactionstatus = SPI_RW(reg); / select registerSPI_RW(value); / and write value to itCSN = 1; / CSN high againreturn(status); / return nRF24L01 status uchar/*/*函数：uint SPI_Read_Buf(uchar reg, uchar *pBuf, uchar uchars)/*功能: 用于读数据，reg：为寄存器地址， pBuf：为待读出数据地址，uchars：读出数据的个数/*/uint SPI_Read_Buf(uchar reg, uchar *pBuf, uchar uchars)uint status,uchar_ctr;CSN = 0; / Set CSN low, init SPI tranactionstatus = SPI_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; return(status); / return nRF24L01 status uchar/*/*函数：uint SPI_Write_Buf(uchar reg, uchar *pBuf, uchar uchars)/*功能: 用于写数据：为寄存器地址，pBuf：为待写入数据地址，uchars：写入数据的个数/*/uint SPI_Write_Buf(uchar reg, uchar *pBuf, uchar uchars)uint status,uchar_ctr;CSN = 0; /SPI 使能 status = SPI_RW(reg); for(uchar_ctr=0; uchar_ctruchars; uchar_ctr+) /SPI_RW(*pBuf+);CSN = 1; /关闭 SPIreturn(status); / /*/*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, 0x0f); / IRQ 收发完成中断响应，16 位 CRC ，主接收CE = 1; inerDelay_us(130);/*/*函数：unsigned char nRF24L01_RxPacket(unsigned char* rx_buf)/*功能：数据读取后放如 rx_buf 接收缓冲区中/*/unsigned char nRF24L01_RxPacket(unsigned char* rx_buf)unsigned char revale=0;sta=SPI_Read(STATUS); / 读取状态寄存其来判断数据接收状况if(RX_DR) / 判断是否接收到数据CE = 0; /SPI 使能SPI_Read_Buf(RD_RX_PLOAD,rx_buf,TX_PLOAD_WIDTH);/ read receive payload from RX_FIFO bufferrevale =1; /读取数据完成标志SPI_RW_Reg(WRITE_REG+STATUS,sta); /接收到数据后 RX_DR,TX_DS,MAX_PT 都置高为 1，通过写 1 来清楚中断标志return revale;/*/*函数：void nRF24L01_TxPacket(unsigned char * tx_buf)/*功能：发送 tx_buf 中数据/*/void nRF24L01_TxPacket(unsigned char * tx_buf)CE=0; /StandBy I 模式SPI_Write_Buf(WRITE_REG + RX_ADDR_P0, TX_ADDRESS, TX_ADR_WIDTH); / 装载接收端地址SPI_Write_Buf(WR_TX_PLOAD, tx_buf, TX_PLOAD_WIDTH); / 装载数据SPI_RW_Reg(WRITE_REG + CONFIG, 0x0e); / IRQ 收发完成中断响应，16 位 CRC，主发送CE=1; /置高 CE，激发数据发送inerDelay_us(10);/*主函数*void main(void)unsigned char tf =0;unsigned char TxBuf20=0; / unsigned char RxBuf20=0;init_NRF24L01() ;led0=0;led1=0;led2=0;led3=0;P0=0x00;TxBuf1 = 1 ;TxBuf2 = 1 ;nRF24L01_TxPacket(TxBuf); / Transmit Tx buffer dataDelay(6000);P0=0xBF;while(1)if(KEY1 =0 ) P0=seg1;TxBuf1 = 1 ;