NRF24L01的发送与接收程序

#includereg52.h#includeintrins.htypedefunsignedcharuchar;typedefunsignedcharuint;//****************************************NRF24L01端口定义sbitMISO=P1^5;sbitMOSI=P1^1;sbitSCK=P1^6;sbitCE=P1^7;sbitCSN=P1^2;sbitIRQ=P1^0;//************************************按键sbitKEY1=P3^4;//************************************蜂明器sbitLED=P3^5;//**************#defineTX_ADR_WIDTH5//5uintsTXaddresswidth#defineRX_ADR_WIDTH5//5uintsRXaddresswidth#defineTX_PLOAD_WIDTH32//20uintsTXpayload#defineRX_PLOAD_WIDTH32//20uintsTXpayloaduintconstTX_ADDRESS[TX_ADR_WIDTH]={0x34,0x43,0x10,0x10,0x01};//本地地址uintconstRX_ADDRESS[RX_ADR_WIDTH]={0x34,0x43,0x10,0x10,0x01};//接收地址//***************************************NRF24L01寄存器指令#defineREAD_REG0x00//读寄存器指令#defineWRITE_REG0x20//写寄存器指令#defineRD_RX_PLOAD0x61//读取接收数据指令#defineWR_TX_PLOAD0xA0//写待发数据指令#defineFLUSH_TX0xE1//冲洗发送FIFO指令#defineFLUSH_RX0xE2//冲洗接收FIFO指令#defineREUSE_TX_PL0xE3//定义重复装载数据指令#defineNOP0xFF//保留//*************************************SPI(nRF24L01)寄存器地址#defineCONFIG0x00//配置收发状态，CRC校验模式以及收发状态响应方式#defineEN_AA0x01//自动应答功能设置#defineEN_RXADDR0x02//可用信道设置#defineSETUP_AW0x03//收发地址宽度设置#defineSETUP_RETR0x04//自动重发功能设置#defineRF_CH0x05//工作频率设置#defineRF_SETUP0x06//发射速率、功耗功能设置#defineSTATUS0x07//状态寄存器#defineOBSERVE_TX0x08//发送监测功能#defineCD0x09//地址检测#defineRX_ADDR_P00x0A//频道0接收数据地址#defineRX_ADDR_P10x0B//频道1接收数据地址#defineRX_ADDR_P20x0C//频道2接收数据地址#defineRX_ADDR_P30x0D//频道3接收数据地址#defineRX_ADDR_P40x0E//频道4接收数据地址#defineRX_ADDR_P50x0F//频道5接收数据地址#defineTX_ADDR0x10//发送地址寄存器#defineRX_PW_P00x11//接收频道0接收数据长度#defineRX_PW_P10x12//接收频道0接收数据长度#defineRX_PW_P20x13//接收频道0接收数据长度#defineRX_PW_P30x14//接收频道0接收数据长度#defineRX_PW_P40x15//接收频道0接收数据长度#defineRX_PW_P50x16//接收频道0接收数据长度#defineFIFO_STATUS0x17//FIFO栈入栈出状态寄存器设置//*****************************************************************************voidDelay(unsignedints);voidinerDelay_us(unsignedcharn);voidinit_NRF24L01(void);uintSPI_RW(uintuchar);ucharSPI_Read(ucharreg);voidSetRX_Mode(void);uintSPI_RW_Reg(ucharreg,ucharvalue);uintSPI_Read_Buf(ucharreg,uchar*pBuf,ucharuchars);uintSPI_Write_Buf(ucharreg,uchar*pBuf,ucharuchars);unsignedcharnRF24L01_RxPacket(unsignedchar*rx_buf);voidnRF24L01_TxPacket(unsignedchar*tx_buf);//*****************************************长延时voidDelay(unsignedints){unsignedinti;for(i=0;is;i++);for(i=0;is;i++);}//*****************************************************************************uintbdatasta;//状态标志sbitRX_DR=sta^6;sbitTX_DS=sta^5;sbitMAX_RT=sta^4;/******************************************************************************/*延时函数voidinerDelay_us(unsignedcharn){for(;n0;n--)_nop_();}//*****************************************************************************/*NRF24L01初始化//*****************************************************************************/voidinit_NRF24L01(void){inerDelay_us(100);CE=0;//chipenableCSN=1;//SpidisableSCK=0;//SpiclocklineinithighSPI_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Page21SPI_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0dBSPI_RW_Reg(WRITE_REG+CONFIG,0x0f);//IRQ收发完成中断响应，16位CRC，主接收}/******************************************************************************/*函数：uintSPI_RW(uintuchar)/*功能：NRF24L01的SPI写时序/******************************************************************************uintSPI_RW(uintuchar){uintbit_ctr;for(bit_ctr=0;bit_ctr8;bit_ctr++)//output8-bit{MOSI=(uchar&0x80);//output'uchar',MSBtoMOSIuchar=(uchar1);//shiftnextbitintoMSB..SCK=1;//SetSCKhigh..uchar|=MISO;//capturecurrentMISObitSCK=0;//..thensetSCKlowagain}return(uchar);//returnreaduchar}/******************************************************************************/*函数：ucharSPI_Read(ucharreg)/*功能：NRF24L01的SPI时序/******************************************************************************ucharSPI_Read(ucharreg){ucharreg_val;CSN=0;//CSNlow,initializeSPIcommunication...SPI_RW(reg);//Selectregistertoreadfrom..reg_val=SPI_RW(0);//..thenreadregistervalueCSN=1;//CSNhigh,terminateSPIcommunicationreturn(reg_val);//returnregistervalue}/*****************************************************************************//*功能：NRF24L01读写寄存器函数/*****************************************************************************/uintSPI_RW_Reg(ucharreg,ucharvalue){uintstatus;CSN=0;//CSNlow,initSPItransactionstatus=SPI_RW(reg);//selectregisterSPI_RW(value);//..andwritevaluetoit..CSN=1;//CSNhighagainreturn(status);//returnnRF24L01statusuchar}/*****************************************************************************//*函数：uintSPI_Read_Buf(ucharreg,uchar*pBuf,ucharuchars)/*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/*****************************************************************************/uintSPI_Read_Buf(ucharreg,uchar*pBuf,ucharuchars){uintstatus,uchar_ct