1. 程序下载到2个开发板
2. 然后按KEY(左下角第一个按钮)后发送信息,发送完毕后蜂鸣器响一下,对方受到信息后同样 响一下。
3. 而且两个开发板都可以做为发送和接收,一个做为发送,对应另一即为接收,实现及时双向通信。
单片机源程序如下:
- //
- #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,};
- code TxAddress[4]={0xcc,0xcc,0xcc,0xcc};
- char tf;
- //----------------------------------------NRF905工作模式控制端口------------------------------------------------------
- sbit TXEN=P1^0;
- sbit TRX_CE=P3^2;
- sbit PWR=P1^1;
- //----------------------------------------LED显示端口---------------------------------------------------
- sbit LED=P2^3; //蜂鸣器
- //----------------------------------------NRF905 数据交换端口---------------------------------------------------
- sbit MISO=P1^6;
- sbit MOSI=P1^5;
- sbit SCK=P1^7;
- sbit CSN=P1^3;
- //----------------------------------------nrf905状态端口---------------------------------------------------------
- sbit AM=P1^4;
- sbit DR=P3^3;
- sbit CD=P1^2;
- //---------------------------------------------------------------------------------------------------------------
- //----------------------------------------按键端口-------------------------------------------------------
- sbit KEY=P3^4; //BST-V51开发板上最下角第一个按键
- //----------------------------------------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]);
- }
- 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
- }
- 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)
- }
- //-----------------------------------------------设置接收初始化---------------------------------------------------
- void SetRxMode(void)
- {
- TXEN=0;
- TRX_CE=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;
- //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)
- {
- DR=0;
- return 1;
- }
- else
- {
- return 0;
- }
- }
- //----------------------------------------------------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)
- {
- SetRxMode();
- // 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();
- if(TxRxBuf[0]==0x29)
- {
- LED=0;
- nrf905_Delay(300);
- LED=1;
- nrf905_Delay(300);//接收到数据 后闪烁
- }
- }
- //-----------------------------------------------------------------------------------------------------------------
- void main(void)
- {
- nRF905Init();
- Config905();
- LED=1;
- while(1)
- {
- RX();
- if(KEY ==0 )
- {
- while(KEY==0);
- tf = 1 ;
- TxRxBuf[0]=0x29;
- }
-
- if (tf==1)
- {
- SetTxMode();
- TxPacket(TxRxBuf); // 发送命令数据
- LED=0;
- nrf905_Delay(300);
- LED=1;
- nrf905_Delay(300); //发送后蜂鸣器响一下
- tf = 0;
- }
- }
- }
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RF905无线模块代码.zip
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