NRF24L01全双工调试程序 自动切换收发模式 可用于实现对讲机.docVIP

/NRF24L01调试程序，全双工双向通信，即两个模块兼具收发功能，自动高速切换收发模式。/使用本程序的前提条件是：硬件没问题。如果能正确运行本程序，也能说明你的硬件电路没问题。/大家根据实际情况，更改 NRF24L01 各引脚、LED 和 KEY 的宏定义。/LED灯的状态由RxBuf0来决定，RxBuf0 = 0,LED输出0；RxBuf0 = 1,LED输出1；你也可以自行更改规则。/KEY可以改变TxBuf0的值，从而改变另一起模块RxBuf0的值，进而改变LED的状态。/此程序未用到外部中断，即不响应IRQ 因此IRQ引脚可以接任意I/O口，不必接到外部中断引脚，不过建议接到外部中断引脚。/若注释部分为乱码：设置keil：EditConfigurationEditorEncoding 选择chinese2312。/以下程序经过多次复制，粘贴到keil，没有错误，如出现错误，请下载文档后再复制。/粘贴到word后排布可能会变得不整齐，请自行排布。/全双工应用实例：/v_show/id_XNzM4MDYwNzY0.html#include#include#define uchar unsigned char #define uint unsigned intsbit P00 = P00;sbit P01 = P01;sbit P02 = P02;sbit P03 = P03;sbit P04 = P04;sbit P05 = P05;sbit P06 = P06;sbit P07 = P07;sbit P10 = P10;sbit P11 = P11;sbit P12 = P12;sbit P13 = P13;sbit P14 = P14;sbit P15 = P15;sbit P16 = P16;sbit P17 = P17;sbit P20 = P20;sbit P21 = P21;sbit P22 = P22;sbit P23 = P23;sbit P24 = P24;sbit P25 = P25;sbit P26 = P26;sbit P27 = P27;sbit P30 = P30;sbit P31 = P31;sbit P32 = P32;sbit P33 = P33;sbit P34 = P34;sbit P35 = P35;sbit P36 = P36;sbit P37 = P37;#define LEDP36#define KEY P20/*延时函数*/void delayus(uint us)for(;us 0;us-)_nop_();/*void delayms(uint ms)/延时？个 ms uchar a,b,c;while(ms-) for(c=1;c0;c-) for(b=142;b0;b-) for(a=2;a0;a-);*/*NRF24L01 IO端口定义*/#define CE P10#define SCK P11#defineMISO P12#define CSN P16#define MOSI P17#define IRQ P32/*NRF24L01的接收和发送地址*/#define TX_ADR_WIDTH 5 / 5个字节的TX地址长度#define RX_ADR_WIDTH 5 / 5个字节的RX地址长度#define TX_PLOAD_WIDTH 16 / ?个字节的TX数据长度#define RX_PLOAD_WIDTH 16 / ?个字节的RX数据长度uchar 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;/接收地址/*NRF24L01寄存器指令*/#define READ_REG 0x00 / 读寄存器#define WRITE_REG 0x20 / 写寄存器#define RD_RX_PLOAD 0x61 / 读取接收数据#define WR_TX_PLOAD 0xA0 / 写待发数据#define FLUSH_TX 0xE1 / 冲洗发送 FIFO#define FLUSH_RX 0xE2 / 冲洗接收 FIFO#define REUSE_TX_PL 0xE3 / 定义重复装载数据#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 init_NRF24L01();uchar SPI_RW(uchar num);uchar SPI_Read(uchar reg);void SetRX_Mode();void SetTx_Mode();uchar SPI_RW_Reg(uchar reg, uchar value);uchar SPI_Read_Buf(uchar reg, uchar *pBuf, uchar uchars);uchar SPI_Write_Buf(uchar reg, uchar *pBuf, uchar uchars);void nRF24L01_RxPacket(uchar *rx_buf);void nRF24L01_TxPacket(uchar *tx_buf);/*状态标志*/uchar bdata sta;sbitRX_DR=sta6;sbitTX_DS=sta5;sbitMAX_RT=sta4; /*NRF24L01初始化*/void init_NRF24L01() delayus(100); CE=0; / 片选使能 CSN=1; / SPI使能 SCK=0; / SPI时钟拉低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); /通道0自动应答 SPI_RW_Reg(WRITE_REG + EN_RXADDR, 0x01); /允许接收地址频道0 SPI_RW_Reg(WRITE_REG + RF_CH, 0x32); /设置信道工作频率，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_RW_Reg(WRITE_REG + CONFIG, 0x7c); /IRQ引脚不显示中断 掉电模式 116CRC校验/*/*函数：uint SPI_RW(uint uchar)/*功能：NRF24L01的SPI写时序/*/uchar SPI_RW(uchar num)uchar bit_ctr; for(bit_ctr=0;bit_ctr8;bit_ctr+) / output 8-bit MOSI = (num & 0x80); / output uchar, MSB to MOSInum = (num 1); / shift next bit into MSB.SCK = 1; / Set SCK high.num |= MISO; / capture current MISO bitSCK = 0; / .then set SCK low again return(num); / 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 from.reg_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/*/uchar SPI_RW_Reg(uchar reg, uchar value)uchar status;CSN = 0; / CSN low, init SPI transactionstatus = SPI_RW(reg); / select registerSPI_RW(value); / .and write value to it.CSN = 1; / CSN high againreturn(status); / return nRF24L01 status uchar/*/uchar SPI_Read_Buf(uchar reg, uchar *pBuf, uchar bytes)uchar status,byte_ctr;CSN = 0; / Set CSN low, init SPI tranactionstatus = SPI_RW(reg); / Select register to write to and read status bytefor(byte_ctr=0;byte_ctrbytes;byte_ctr+)pBufbyte_ctr = SPI_RW(0); / Perform SPI_RW to read byte from nRF24L01CSN = 1; / Set CSN high againreturn(status); / return nRF24L01 status byte/*/*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/*/uchar SPI_Write_Buf(uchar reg, uchar *pBuf, uchar uchars)uchar 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); / /* nrf收发程序 *void nrf_RxTx(uchar mod_nrf,uchar *buff) /NRF24L01收发程序static uchar mod_nrf_b;/static 地址不释放/*进入发射模式*if(mod_nrf = t)if(mod_nrf_b != t)mod_nrf_b = t;CE = 0; SPI_RW_Reg(WRITE_REG+STATUS,0xff); /清除中断标志SPI_RW_Reg(FLUSH_TX,0x00);/清除TX_FIFO寄存器 SPI_RW_Reg(WRITE_REG + CONFIG,0x7e);/IRQ引脚不显示中断 上电 发射模式 116CRC校验CE = 1;delayus(130);/从CE = 0 到 CE = 1；即待机模式到收发模式，需要最大130us /*发送数据*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,buff,TX_PLOAD_WIDTH); / 装载数据CE = 1; /置高CE激发数据发送delayus(130);/从CE = 0 到 CE = 1；即待机模式到收发模式，需要最大130usdelayus(100); /给发送数据一点时间 比发送速度较快 延时可以比接收少sta = SPI_Read(STATUS);/读取状态寄存器的值SPI_RW_Reg(WRITE_REG+STATUS,sta);/清除对应的中断if(TX_DS = 1)/发送成功再清除tx fifo寄存器CE = 0;SPI_RW_Reg(FLUSH_TX,0x00); /清除tx fifo寄存器/*重要*CE = 1; /*进入接收模式*else if(mod_nrf = r)/接收模式if(mod_nrf_b != r)mod_nrf_b = r;CE = 0; SPI_RW_Reg(WRITE_REG+STATUS,0xff);/清除中断标志SPI_RW_Reg(FLUSH_RX,0x00); /清除RX_FIFO寄存器SPI_RW_Reg(WRITE_REG + CONFIG, 0x7f);/IRQ引脚不显示中断 上电 接收模式 116CRC校验 CE = 1; delayus(130);/从CE = 0 到 CE = 1；即待机模式到收发模式，需要