关于NRF905的收发程序与资料 -

#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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