NRF24L01无线发射程序

#include <reg52.h>#include <intrins.h>typedef unsigned char uchar;typedef unsigned char uint;unsigned char tab[]={ 0x03,0x9F,0x25,0x0D,0x99,0x49,0x41,0x1F,0x01,0x09};unsigned char TxBuf[2]={0}; //unsigned int f=10,a,m;sbit s1=P2^6;sbit s2=P2^7;//***************************NRF24L01端口定义******************************** sbit M ISO =P1^5;sbit M OSI =P1^4;sbit SCK =P1^3;sbit CE =P1^1;sbit CSN =P1^2;sbit IRQ =P3^3;//***********************************延时ms*********************************** void delayms(unsigned int a){unsigned char j;while (a--)for(j=0;j<120;j++);}void delay1(uchar del){uchar i,j;for(i=0;i<del;i++)for(j=0;j<148;j++);}void InitTimer0(){TMOD = 0x01;TH0 = 0x0FC;TL0 = 0x66;EA = 1;ET0 = 1;TR0 = 1;}//*********************************************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 3 // 20 uints TX payload#define RX_PLOAD_WIDTH 3 // 20 uints TX payloaduint const TX_ADDRESS[TX_ADR_WIDTH]= {0x34,0x43,0x10,0x10,0x01}; //本地地址uint const RX_ADDRESS[RX_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; i<s; i++);for(i=0; i<s; i++);}void display(){P0=tab[f/10];s1=0;delay1(1);s1=1;P0=tab[f%10];s2=0;delay1(1);s2=1;}//***************************************************************************** *************uint bdata sta; //状态标志sbit RX_DR =sta^6;sbit TX_DS =sta^5;sbit MAX_RT =sta^4;/****************************************************************************** ************/*延时函数/****************************************************************************** ************/void inerDelay_us(unsigned char n){for(;n>0;n--)_nop_();}//***************************************************************************** ***********/*NRF24L01初始化//*****************************************************************************/ void init_NRF24L01(void){inerDelay_us(100);CE=0; // chip enableCSN=1; // Spi disableSCK=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, 0x04); //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_ctr<8;bit_ctr++) // output 8-bit{MOSI = (uchar & 0x80); // output 'uchar', MSB to MOSIuchar = (uchar << 1); // shift next bit into MSB..SCK = 1; // Set SCK high..uchar |= MISO; // capture current MISO bitSCK = 0; // ..then set SCK low again}return(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 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/****************************************************************************** **********************/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 it..CSN = 1; // CSN high againreturn(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_ctr<uchars; 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：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;SPI_Write_Buf(WRITE_REG + TX_ADDR, TX_ADDRESS, TX_ADR_WIDTH);SPI_Write_Buf(WRITE_REG + RX_ADDR_P0, TX_ADDRESS, TX_ADR_WIDTH);SPI_Write_Buf(WR_TX_PLOAD, tx_buf, TX_PLOAD_WIDTH);SPI_RW_Reg(WRITE_REG + CONFIG, 0x0e);CE=1;Delay(50);CE = 0;while(IRQ);sta=SPI_Read(STATUS);if(TX_DS){SPI_RW_Reg(WRITE_REG+STA TUS,0xFF);CSN = 0;SPI_RW(FLUSH_TX);CSN = 1;IRQ = 1;inerDelay_us(130);}}//************************************主函数********************************** void main(void){InitTimer0();init_NRF24L01() ;while(1){display();nRF24L01_TxPacket(TxBuf); // Transmit Tx buffer dataSetRX_Mode();if(!TX_DS){TxBuf[1] = tab[f/10];TxBuf[2] =tab[f%10];SPI_RW_Reg(WRITE_REG+STA TUS,0xFF);CSN = 0;SPI_RW(FLUSH_TX);CSN = 1;IRQ = 1;inerDelay_us(130);}}}void Timer0Interrupt() interrupt 1{TH0 = 0x0FC;TL0 = 0x66;a++;if(a==1000){a=0;f--;if(f==-1)f=5;}}。