关于NRF905的收发
1. 将改程序下载到2个开发板
2. 然后按KEY后发送信息,发送完毕后LDE闪烁,对方受到信息后同样 闪烁
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 <intrins.h>
- #include <ABSACC.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;
- #define TxRxBuf_Len 4
- unsigned char TxRxBuf[TxRxBuf_Len]={0x29,0x30,0x31,0x32,};
- code TxAddress[4]={0xcc,0xcc,0xcc,0xcc};
- char tf;
- sbit TXEN=P1^4;
- sbit PWR=P2^4;
- sbit LEDnrf905=P2^7;
- sbit CD=P2^5;
- sbit AM=P2^6;
- sbit MISO=P1^6;
- sbit MOSI=P1^7;
- sbit SCK=P1^5;
- sbit CSN=P1^4;
- sbit TRX_CE=P3^2;
- sbit DR=P3^3;
- sbit KEY=P3^4;
- #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;
- }
- 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;
- SCK=0;
- DR=1;
- AM=1;
- CD=1;
- PWR=1;
- TRX_CE=0;
- TXEN=0;
- }
- //-----------------------------------------------------初始化寄存器-----------------------------------------------
- void Config905(void)
- {
- uchar i;
- CSN=0;
- 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;
- CSN=0;
- SpiWrite(WTP); // 写SPI指令
- for (i=0;i<4;i++)
- {
- SpiWrite(TxRxBuf[i]); // 写32位传送指令
- }
- CSN=1;
- nrf905_Delay(1);
- CSN=0;
- SpiWrite(WTA); //写SPI地址
- for (i=0;i<4;i++) // 写入与对方地址一样的地址
- {
- SpiWrite(TxAddress[i]);
- }
- CSN=1;
- TRX_CE=1;
- nrf905_Delay(1);
- TRX_CE=0;
- }
- //----------------------------------------------设置发送初始状态---------------------------------------------
- void SetTxMode(void)
- {
- TRX_CE=0;
- TXEN=1;
- nrf905_Delay(1); //延时大于650us发送
- }
- //-----------------------------------------------设置接收初始化---------------------------------------------------
- void SetRxMode(void)
- {
- TXEN=0;
- TRX_CE=1;
- nrf905_Delay(1);
- }
- void RxPacket(void)
- {
- uchar i;
- 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)
- {
- LEDnrf905=0;
- nrf905_Delay(300);
- LEDnrf905=1;
- nrf905_Delay(300);//接收到数据 后闪烁
- }
- }
- //-----------------------------------------------------------------------------------------------------------------
- void main(void)
- {
- nRF905Init();
- Config905();
- LEDnrf905=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
- LEDnrf905=0;
- nrf905_Delay(300);
- LEDnrf905=1;
- nrf905_Delay(300); //发送后LED闪烁
- tf=0;
- }
- }
- }
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所有资料51hei提供下载:
RF905-无线调试板开发包.7z
(3.73 MB, 下载次数: 38)
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