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使用pic16f877a的nrf24l01无线传输问题

2014-4-15 23:17:21 4099 无线

0 本科生做毕业设计，如题的无线采集传输，编完程序不知遇到什么问题，就是发送不了，已经调试了好长时间了，有没有高手可以指导我下，谢谢谢谢啊。我觉得程序应该没大问题，不知是哪个小问题导致的，就是查不出来。求助啊求助~有米有懂的 0
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风中的歌_elvis · 2014-4-15 23:21:50 沙发 #include "pic.h" #include "def.h" __CONFIG(0x3b31); #define uchar unsigned char #define uint unsigned int #define LED_TRANSMIT RA1 //绿灯，发送 #define LED_RETRANSMIT RA2 //黄灯，重发 static volatile uchar stat=0x0; static volatile uchar stat @ 0x20; //tmpData定位在地址0x20 static volatile bit RX_DR @ (unsigned)&stat8+6; static volatile bit TX_DS @ (unsigned)&stat8+5; static volatile bit MAX_RT @ (unsigned)&stat8+4; //定义通用寄存器，存放SATUS中的状态位 /************************************************/ / unsigned char FLAG @ 0XEF; #define FLAGIT(adr,bit) ((unsigned)(&adr)8+(bit)) //绝对寻址位操作指令 static bit FLAG1 @ FLAGIT(FLAG,0); static bit FLAG2 @ FLAGIT(FLAG,1); static bit FLAG3 @ FLAGIT(FLAG,2); / #define TX_ADR_WIDTH 5 // 5 bytes TX(RX) address width 5字节地址 #define TX_PLOAD_WIDTH 5 // 5 bytes TX payload 一次发5bytes数据 uchar const TX_ADDRESS[TX_ADR_WIDTH] = {0x34,0x43,0x10,0x10,0x63}; // Define a static TX address uchar rx_buf[TX_PLOAD_WIDTH]; uchar tx_buf[TX_PLOAD_WIDTH]; /************************************************ Function: Port_init(); Description: flash led one time,chip enable(ready to TX or RX Mode), Spi disable,Spi clock line init high /**********************************************/ void Port_init(void){ TRISA=0b00000001; //RA0 INPUT RA1 output RA2 output TRISC=0b00010001; //MISO & IRQ as input PORTC=0x00; PORTB=0x00; PORTA=0x00; /////***************初始化SPI SSPSTAT=0x40; //对SPI设置 SSPCON=0x20; //使能SPI，时钟为Fosc/4 SSPIF=0; ///////**** 初始化nrf24L01 CE=0; // chip enable 待机模式低电平 CSN=1; // Spi disable 片选低有效 SCK=0; // Spi clock line init low } /**********************************************/ /********************************************** Function: Description: delay ms , 30us /**********************************************/ void delayms(uint ms) //定义延时函数 4MHz下 { int i,j; for(i=0;i for(j=0;j<48;j++) {;} } void delay30us(uchar us) //定义延时函数,延时30us 4MHz下 { uchar i; for(i=us;i>0;i--) {;} } /**********************************************/ void inited(void) { ///初始化AD ADCON1=0b00000000; // ADFM=1; 右对齐，ADRESL保存低八位 // PCFG3=0; PCFG2=0; PCFG1=0; PCFG0=0 // PCFG3:PCFG0=0000,全为模拟引脚，参考电压为VDD和VSS ADCS1=1; ADCS0=1; // 使用A/D转换模块内部RC振荡器作为时钟 CHS2=0; CHS1=0; CHS0=0; // CHS2:CHS0=000, 选择通道0进行A/D转换 } // 进行A/D转换，采集数据 void adinput(void) { int i; ADON=1; // 开启A/D转换模块 delay30us(1); // 为了采样保持电路充电的延时，超过25us即可 GO=1; // 启动一次A/D转换 while(GO) // 查询A/D转换是否完成 {;} tx_buf[1]=ADRESH; tx_buf[2]=ADRESL; } /********************************************** Function: SPI_RW(); pic向nrf中写入一个字节 Description: Writes one byte to nRF24L01, and return the byte read from nRF24L01 during write, according to SPI protocol /**********************************************/ uchar SPI_RW(uchar byte) { ////通过spi写一个字节数据 SSPBUF=byte; while(!SSPIF); SSPIF=0; return 0; } /********************************************** Function: SPI_Write(); Description: Writes value 'value' to register 'reg' /**********************************************/ uchar SPI_Write(uchar reg, uchar value) { CSN = 0; // CSN low, init SPI transaction SPI片选 SPI_RW(reg); // select register SPI_RW(value); // ..and write value to it.. CSN = 1; // CSN high again return(0); } /**********************************************/ /********************************************** Function: SPI_Read(); Description: Read one byte from nRF24L01 register, 'reg' /**********************************************/ uchar SPI_Read(uchar reg) { uchar reg_value; CE=0; CSN = 0; // CSN low, initialize SPI communication... SPI_RW(reg); // Select register to read from.. reg_value=SPI_RW(0); // ..then read registervalue CSN = 1; // CSN high, terminate SPI communication return(reg_value); // return register value } /**********************************************/ /********************************************** Function: SPI_Read_Buf(); Description: Reads 'bytes' #of bytes from register 'reg' Typically used to read RX payload, Rx/Tx address /***********************************************/ uchar SPI_Read_Buf(uchar reg,uchar pBuf,uchar bytes) { uchar byte_ctr; CSN = 0; // Set CSN low, init SPI tranaction SPI_RW(reg); //Select register to read for(byte_ctr=0;byte_ctr pBuf[byte_ctr] = SPI_RW(0); // Perform SPI_RW to read byte from nRF24L01 CSN = 1; // Set CSN high again return(0); } /************************************************/ /************************************************ Function: SPI_Write_Buf(); Description: Writes contents of buffer 'pBuf' to nRF24L01 Typically used to write TX payload, Rx/Tx address /************************************************/ uchar SPI_Write_Buf(uchar reg, const uchar pBuf, uchar bytes) { uchar byte_ctr; CSN = 0; // Set CSN low, init SPI tranaction SPI_RW(reg); //Select register to write to for(byte_ctr=0;byte_ctr SPI_RW(pBuf++); ////////指针变量pBuf CSN = 1; // Set CSN high again return(0); } /***********************************************/ /********************************************** Function: RX_Mode(); Description: This function initializes one nRF24L01 device to RX Mode, set RX address, writes RX payload width, select RF channel, datarate & LNA HCURR. After init, CE is toggled high, which means that this device is now ready to receive a datapacket. /**********************************************/ void RX_Mode(void){ CE=0; SPI_Write_Buf(WRITE_REG + RX_ADDR_P0, TX_ADDRESS, TX_ADR_WIDTH); // Use the same address on the RX device as the TX device SPI_Write(WRITE_REG + EN_AA, 0x01); // Enable Auto.Ack:Pipe0 SPI_Write(WRITE_REG + EN_RXADDR, 0x01); // Enable Pipe0 SPI_Write(WRITE_REG + RF_CH, 40); // Select RF channel 40 SPI_Write(WRITE_REG + RX_PW_P0, TX_PLOAD_WIDTH); // Select same RX payload width as TX Payload width SPI_Write(WRITE_REG + RF_SETUP, 0x07); // TX_PWR:0dBm, Datarate:2Mbps, LNA:HCURR SPI_Write(WRITE_REG + CONFIG, 0x0f); // Set PWR_UP bit, enable CRC(2 bytes) & Prim:RX. RX_DR enabled.. CE = 1; // Set CE pin high to enable RX device // This device is now ready to receive one packet of 16 bytes payload from a TX device sending to address // '3443101001', with auto acknowledgment, retransmit count of 10, RF channel 40 and datarate = 2Mbps. } /**********************************************/ /********************************************** Function: TX_Mode(); Description: This function initializes one nRF24L01 device to TX mode, set TX address, set RX address for auto.ack, fill TX payload, select RF channel, datarate & TX pwr. PWR_UP is set, CRC(2 bytes) is enabled, & PRIM:TX. ToDo: One high pulse(>10us) on CE will now send this packet and expext an acknowledgment from the RX device. /**********************************************/ void TX_Mode(void) { CE=0; SPI_Write(WRITE_REG+STATUS,0x70); // clear all interrupt flag,write 1 to clear bit SPI_Write_Buf(WRITE_REG + TX_ADDR, TX_ADDRESS, TX_ADR_WIDTH); // Writes TX_Address to nRF24L01 SPI_Write_Buf(WRITE_REG + RX_ADDR_P0, TX_ADDRESS, TX_ADR_WIDTH); // RX_Addr0 same as TX_Adr for Auto.Ack SPI_Write_Buf(WR_TX_PLOAD, tx_buf, TX_PLOAD_WIDTH); // Writes data to TX payload SPI_Write(WRITE_REG + EN_AA, 0x01); // Enable Auto.Ack:Pipe0 SPI_Write(WRITE_REG + EN_RXADDR, 0x01); // Enable Pipe0 SPI_Write(WRITE_REG + SETUP_RETR, 0x1a); // 500us + 86us, 10 retrans... SPI_Write(WRITE_REG + RF_CH, 40); // Select RF channel 40 total 128 SPI_Write(WRITE_REG + RF_SETUP, 0x07); // TX_PWR:0dBm, Datarate:2Mbps, LNA:HCURR SPI_Write(WRITE_REG + CONFIG, 0x0e); // Set PWR_UP bit, enable CRC(2 bytes) &reflect:TX. MAX_RT & TX_DS enabled.. CE=1; delay30us(1); CE=0; } /**********************************************/ /********************************************** Function: Transmit(); Description: Transmit the data in tx_buf[]. /**********************************************/ void Transmit(void) { CE=0; SPI_Write_Buf(WRITE_REG + RX_ADDR_P0, TX_ADDRESS, TX_ADR_WIDTH); // 装载接收端地址 SPI_Write(FLUSH_TX,0x00); SPI_Write_Buf(WR_TX_PLOAD, tx_buf, TX_PLOAD_WIDTH); // 装载数据 CE=1; delay30us(1); CE=0; } /********************************************** Function: Nrf_power_down(); Description: For the since of energy conservation,turn nRF24L01 in Power Down mode. /**********************************************/ void Nrf_power_down(void) { CE=0; SPI_Write(WRITE_REG + CONFIG, SPI_Read(READ_REG + CONFIG)&0xFD); } void Nrf_power_up(void) { CE=0; SPI_Write(WRITE_REG + CONFIG, SPI_Read(READ_REG + CONFIG)\|0x02); //delay for 1.5 ms for Start up PWR_UP置1 } /********************************************** Function: check_ACK(); Description: check if have "Data sent TX FIFO interrupt",if TX_DS=1, all led light and after delay 100ms all led close /**********************************************/ void Check_ACK(void) { stat=SPI_Read(READ_REG+STATUS); // read register STATUS's while(!TX_DS) { if(MAX_RT) { SPI_Write(WRITE_REG+STATUS,0x10); // clear interrupt flag(MAX_RT) ,write 1 to clear bit LED_RETRANSMIT=0; //Turn led on delayms(200); LED_RETRANSMIT=1; //Turn led off delayms(200); CE=1; delay30us(1); } stat=SPI_Read(READ_REG+STATUS); // read register STATUS's } CE=0; SPI_Write(WRITE_REG+STATUS,stat); // clear all interrupt flag,write 1 to clear bit LED_TRANSMIT=0; //Turn led on delayms(200); LED_TRANSMIT=1; //Turn led off delayms(200); } /**********************************************/ /********************************************** Function: main(); Description: control all subprogrammes; /************************************************/ void main(void) { Port_init(); inited(); TX_Mode(); // set TX Mode delayms(1); //delay for , let nrf24L01 POR reliably while(1) { adinput(); //AD转换 Nrf_power_up(); Transmit(); Check_ACK(); Nrf_power_down(); delayms(500); //延迟500ms>100ms,节能 } }

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