demo.rar_51单片机 无线_DEMO

#include <reg51.h> #include <stdio.h> #include "nRF905.h" //---------------------------------------------------------------------------------------------------------------- #define uint unsigned int #define uchar unsigned char //---------------------------------------------------------------------------------------------------------------- #define BYTE_BIT0 0x01 #define BYTE_BIT1 0x02 #define BYTE_BIT2 0x04 #define BYTE_BIT3 0x08 #define BYTE_BIT4 0x10 #define BYTE_BIT5 0x20 #define BYTE_BIT6 0x40 #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------------------------------------------------- unsigned char TxRxBuf[TxRxBuf_Len]= { 0x29,0x30,0x31,0x32, }; //---------------------------------------------------配置口定义--------------------------------------------------- sbit TXEN=P2^0; sbit TRX_CE=P2^1; sbit PWR=P2^2; sbit MISO=P2^3; sbit MOSI=P2^4; sbit SCK=P2^5; sbit CSN=P2^6; //---------------------------------------------------NRF905状态IO---------------------------------------------------- //sbit AM=P2^7; sbit DR=P2^7; //sbit CD=P0^1; //----------------------------------------------------按键-------------------------------------------------- sbit KEY0=P3^6; sbit KEY1=P3^7; //----------------------------------------------------数码管位控制------------------------------------------------------- //----------------------------------------------------------------------------------------------------------------- //-------------------------------------------------------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 //------------------------------------------------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32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 }; code TxAddress[4]={0xcc,0xcc,0xcc,0xcc}; char tf; //------------------------------------------------延时------------------------------------------------------------ static void Delay(uchar 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=0; // Init DR for input // AM=0; // Init AM for input // CD=0; // 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]); } CSN=1; // Disable Spi } //-----------------------------------------------------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 }// Spi enable for write a spi command CSN=1; Delay(1); // Spi disable CSN=0; // Spi enable for write a spi command SpiWrite(WTA); // Write address command for (i=0;i<4;i++) // Write 4 bytes address { SpiWrite(TxAddress[i]); } CSN=1; // Spi disable TRX_CE=1; // Set TRX_CE high,start Tx data transmission Delay(1); // while (DR!=1); TRX_CE=0; // Set TRX_CE low } //----------------------------------------------------------设置发送状态--------------------------------------------- void SetTxMode(void) { TRX_CE=0; TXEN=1; Delay(1); // delay for mode change(>=650us) } //-----------------------------------------------设置发送状态--------------------------------------------------- void SetRxMode(void) { TXEN=0; TRX_CE=1; Delay(1); // 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 { if (DR=1&&TRX_CE==1 && TXEN==0) { // Delay(50) ; return 1; } else { return 0; } } //----------------------------------------------------读NRF905接收数据------------------------------------------------------------ void RxPacket(void) { uchar i; Delay(1); // TRX_CE=0; // Set nRF905 in standby mode Delay(100); TRX_CE=0; CSN=0; // Spi enable for write a spi command Delay(1); SpiWrite(RRP); for (i = 0 ;i < 4 ;i++) { TxRxBuf[i]=SpiRead(); // Read data and save to buffer } CSN=1; Delay(10); TRX_CE=1; } //--------------------------------------------------------数据接收------------------------------------------------ void RX(void) { SetRxMode(); // Set nRF905 in Rx mode while (CheckDR()==0); Delay(10); RxPacket(); if(TxRxBuf[0]==0x29) { // P0= seg[3]; } if(TxRxBuf[0]==0x30) { // P0= seg[4]; } } #if 0 //----------------------------------------------------------------------------------------------------------------- void main(void) { nRF905Init(); Config905(); // P0= seg[0]; while(1) { RX(); if(KEY0 ==0 ) { tf = 1 ; TxRxBuf[0]=0x29; TxRxBuf[1]=0x30; TxRxBuf[2]=0x31; TxRxBuf[3]=0x32; // P0= seg[1]; } if(KEY1 ==0 ) { tf = 1 ; TxRxBuf[0]=0x30; TxRxBuf[1]=0x31; TxRxBuf[2]=0x32; TxRxBuf[3]=0x29; // P0= seg[2]; } if (tf==1) { SetTxMode();// Set nRF905 in Tx mode TxPacket(TxRxBuf);// Send data by nRF905 tf = 0; } } } #endif