NRF.zip_nRF_nrf905_完整项目

#include <reg52.h> #include <ABSACC.h> #include <intrins.h> #include <stdio.h> #define uint unsigned int #define uchar unsigned char //---------------------------------------------------------------------------------------------------------------- #define BYTE_BIT0 0x01 #define BYTE_BIT7 0x80 //---------------------------------------------------------------------------------------------------------------- bdata unsigned char DATA_BUF; #define DATA7 ((DATA_BUF&BYTE_BIT7) != 0) #define DATA0 ((DATA_BUF&BYTE_BIT0) != 0) sbit flag =DATA_BUF^7; sbit flag1 =DATA_BUF^0; //---------------------------------------------------发送数据缓冲区------------------------------------------------- #define TxRxBuf_Len 4 unsigned char TxRxBuf[TxRxBuf_Len]={0x29,0x30,0x31,0x32}, TxBuf[4]={0x29,0x30,0x31,0x32}; code TxAddress[4]={0xcc,0xcc,0xcc,0xcc}; char tf; bit flag_rx=0; //----------------------------------------NRF905工作模式控制端口------------------------------------------------------ sbit TXEN=P3^5; sbit TRX_CE=P3^6; sbit PWR=P3^7; //----------------------------------------LED显示端口--------------------------------------------------- sbit led0 =P1^7; sbit led1 =P1^6; //----------------------------------------NRF905 数据交换端口--------------------------------------------------- sbit MISO=P2^4; sbit MOSI=P2^3; sbit SCK=P2^2; sbit CSN=P2^1; //----------------------------------------nrf905状态端口--------------------------------------------------------- sbit AM=P2^5; sbit DR=P3^3; sbit CD=P2^6; //--------------------------------------------------------------------------------------------------------------- //----------------------------------------按键端口------------------------------------------------------- sbit KEY0 =P3^2; sbit KEY1 =P1^5; //----------------------------------------nrf905控制指令------------------------------------------- #define WC 0x00 #define RC 0x10 #define WTP 0x20 #define RTP 0x21 #define WTA 0x22 #define RTA 0x23 #define RRP 0x24 void UART_init() { SCON = 0x50; /* uart in mode 1 (8 bit), REN=1 */ TMOD = TMOD | 0x20 ; /* Timer 1 in mode 2 */ TH1 = 0xFD; /* 9600 Bds at 11.059MHz */ TL1 = 0xFD; /* 9600 Bds at 11.059MHz */ //IE =0x90; TR1 = 1; /* Timer 1 run */ ET1 =0; ES=1; //允许串行口中断 PS=1; //设计串行口中断优先级 EA =1; //单片机中断允许 } //------------------------------------------------NRF905寄存器配置------------------------------------------------ unsigned char idata RFConf[11]= { 0x00, //配置命令// 0x4c, //CH_NO,配置频段在430MHZ 0x0c, //输出功率为10db,不重发，节电为正常模式 0x44, //地址宽度设置，为4字节 0x04,0x04, //接收发送有效数据长度为4字节 0xCC,0xCC,0xCC,0xCC, //接收地址 0x58, //CRC充许，8位CRC校验，外部时钟信号不使能，16M晶振 }; //================================================延时=========================================================== void nrf905_Delay(int n) { uint i; while(n--) for(i=0;i<80;i++); } //=================================================SPI读函数======================================================= unsigned char SpiRead(void) { unsigned char j; for (j=0;j<8;j++) { DATA_BUF=DATA_BUF<<1; SCK=1; if (MISO) //读取最高位，保存至最末尾，通过左移位完成整个字节 { DATA_BUF|=BYTE_BIT0; } else { DATA_BUF&=~BYTE_BIT0; } SCK=0; } return DATA_BUF; } //===========================================SPI写函数=============================================================== void SpiWrite(unsigned char send) { unsigned char i; DATA_BUF=send; for (i=0;i<8;i++) { if (DATA7) //总是发送最高位 { MOSI=1; } else { MOSI=0; } SCK=1; DATA_BUF=DATA_BUF<<1; SCK=0; } } //------------------------------------------------------初始化nRF905--------------------------------------------- void nRF905Init(void) { CSN=1; // Spi disable SCK=0; // Spi clock line init low DR=1; // Init DR for input AM=1; // Init AM for input CD=1; // Init CD for input PWR=1; // nRF905 power on TRX_CE=0; // Set nRF905 in standby mode TXEN=0; // set radio in Rx mode } //-----------------------------------------------------初始化寄存器----------------------------------------------- void Config905(void) { uchar i; CSN=0; // Spi enable for write a spi command //SpiWrite(WC); // Write config command写放配置命令 for (i=0;i<11;i++) // Write configration words 写放配置字 { SpiWrite(RFConf[i]); //NRF905寄存器配置 } CSN=1; // Disable Spi //spi使能 } //-----------------------------------------------------发送数据打包--------------------------------------------------- void TxPacket(uchar *TxRxBuf) { uchar i; //Config905(); CSN=0; SpiWrite(WTP); // Write payload command for (i=0;i<4;i++) { SpiWrite(TxRxBuf[i]); // Write 32 bytes Tx data } CSN=1; nrf905_Delay(1); // Spi disable CSN=0; // Spi enable for write a spi command SpiWrite(WTA); // Write address command for (i=0;i<4;i++) // 写入与对方地址一样的地址 { SpiWrite(TxAddress[i]); } CSN=1; // Spi disable TRX_CE=1; // Set TRX_CE high,start Tx data transmission nrf905_Delay(1); // while (DR!=1); TRX_CE=0; // Set TRX_CE low } //----------------------------------------------设置发送初始状态--------------------------------------------- void SetTxMode(void) { TRX_CE=0; TXEN=1; nrf905_Delay(1); // nrf905_Delay for mode change(>=650us) } //-------------------------------------------------判断数据接收状态----------------------------------------------------- unsigned char CheckDR(void) //检查是否有新数据传入 Data Ready { // DR=1; //DR是接收或发送数据完成端口 //通过对端口写1，可以使端口为输入状态，这51的 特性。不熟悉者可以参阅51相关书籍作证(将DR端口设置为输入状态。) if (DR==1&&TRX_CE==1 && TXEN==0) { return 1; } else { return 0; } } /* //-----------------------------------------------设置接收初始化--------------------------------------------------- void SetRxMode(void) { TXEN=0; TRX_CE=1; nrf905_Delay(1); // nrf905_Delay for mode change(>=650us) } //----------------------------------------------------读NRF905接收数据------------------------------------------------------------ void RxPacket(void) { uchar i; nrf905_Delay(1); // TRX_CE=0; // Set nRF905 in standby mode nrf905_Delay(100); TRX_CE=0; CSN=0; // Spi enable for write a spi command nrf905_Delay(1); SpiWrite(RRP); for (i = 0 ;i < 4 ;i++) { TxRxBuf[i]=SpiRead(); // Read data and save to buffer } CSN=1; nrf905_Delay(10); TRX_CE=1; } //--------------------------------------------------------数据接收------------------------------------------------ void RX(void) { nRF905Init(); Config905(); nrf905_Delay(10); SetRxMode();//设置接收初始化 CheckDR(); // while (CheckDR()==0); 为了实现双向通信，就不能一直处于接收等待状态，所以注释掉 nrf905_Delay(10); RxPacket(); //读NRF905接收数据 if(TxRxBuf[0]==0x29) { LED=0; nrf905_Delay(300); LED=1; nrf905_Delay(300);//接收到数据 后闪烁 } if(TxRxBuf[2]!=0) P0=TxRxBuf[2]; } */ void main() { nRF905Init(); // nRF905初始化 Config905(); //初始化寄存器 led0=0; led1=0; while(1) { if(KEY0 ==0 ) { tf=1; TxRxBuf[0]=0x29; TxPacket(TxRxBuf); led0=0; led1=1; } if(KEY1 ==0) { tf=1; TxRxBuf[1]=0x29