nrf905.c

nrf905无线开发 调试原代码 和51通信

#include<at89x51.h>
#include<intrins.h>

#define uchar unsigned char 
#define uint  unsigned int

#define WC		0x00			// Write configuration register command
#define RC		0x10 			// Read  configuration register command
#define WTP		0x20 			// Write TX Payload  command
#define RTP		0x21			// Read  TX Payload  command
#define WTA		0x22			// Write TX Address  command
#define RTA		0x23			// Read  TX Address  command
#define RRP		0x24			// Read  RX Payload  command



typedef struct RFConfig
{
	uchar n;
	uchar buf[10];
}RFConfig;

code RFConfig RxTxConf =
{
	10,
	0x4c, 0x0c, 0x44, 0x20, 0x20, 0xcc, 0xcc, 0xcc,0xcc, 0x58	
};



uchar data TxBuf[32];
uchar data RxBuf[32];


uchar key,rsbrf,delayf,tf;


uchar bdata DATA_BUF;
sbit	flag	=DATA_BUF^7;
sbit	flag1	=DATA_BUF^0;


sbit	TX_EN	=P2^0;
sbit	TRX_CE	=P2^1;
sbit	PWR_UP	=P2^2;
sbit	MISO	=P2^6;
sbit	MOSI	=P2^7;
sbit	SCK	=P3^2;
sbit	CSN	=P3^3;

sbit	AM	=P3^5;
sbit	DR	=P2^5;
sbit	CD	=P2^4;


void InitIO(void);			// Initialize IO port
void Inituart(void);			// initialize 232 uart
void Config905(void);			// Config nRF905 module配置NRF905模式
void SetTxMode(void);			// Set nRF905 in Tx mode
void SetRxMode(void);			// Set nRF905 in Rx mode
void TxPacket(void);			// Send data by nRF905
void RxPacket(void);			// Recive data by nRF905
void SpiWrite(uchar);			// Write data to nRF905
uchar SpiRead(void);			// Read data to nRF905
void Delay(uchar n);			// Delay 100us
void Scankey(void);				// Scan key
void TxData (uchar x);			// Send key_value to CRT display
void comdebug(void);




void TxData (unsigned char x)
{
	SBUF=x;	
	while(TI==0);
		TI=0;
}



void Delay(uchar n)
{
	uint i;
	while(n--)
	for(i=0;i<80;i++);	
}



void serial () interrupt 4
{  
    unsigned char temp;
     if(RI)
       { 
		    
		temp=SBUF;
                rsbrf=temp;
	        RI=0;
	}				
}














void main()
{
unsigned int cyc=0;
unsigned int distan=0;

    SCON=0x50;  													//模式1
    TMOD=0x21;  													//定时模式2
    IE=0x90;															//=====9600=======设置串口通讯寄存器
    
    TH1=0xFD; 
    TL1=0xFD;  															//计数器初值
    
    
  //================NRF905初始化
	CSN=1;														// Spi 	disable						
	SCK=0;														// Spi clock line init high
	DR=1;															// Init DR for input
	AM=1;															// Init AM for input
	PWR_UP=1;													// nRF905 power on
	TRX_CE=0;													// Set nRF905 in standby mode
	TX_EN=0;													// set radio in Rx mode	

  TI = 0;														//串行中断标志位清零
  TR1 = 1;													//打开计数器1  
	//================
	
	
	Config905();											// Config nRF905 module
	SetTxMode();											// Set Tx Mode
	TxPacket();												// Transmit Tx buffer data
	P0=0x00;
	Delay(500);												// delay for led light	
	P0=0xff;													// led close
	SetRxMode();											// Set nRF905 in Rx mode
	
	
	
	

while(1)
{
	 //=====================从键盘获得数据
	 switch(P1)
	    {
	    	
	    case 0xfe:P1=0xef;TxBuf[0]=0xef;tf=1;break;
	  	case 0xfd:P1=0xdf;TxBuf[0]=0xdf;tf=1;break;
		  case 0xfb:P1=0xbf;TxBuf[0]=0xbf;tf=1;break;
		  case 0xf7:P1=0x7f;TxBuf[0]=0x7f;tf=1;break;
	 	 	default:P0=0xff;TxBuf[0]=0xff; 
	 	 		
		 } 
	 if (tf==1)
	   {	
			
			  switch(TxBuf[0])
			    {
			      case 0xef:TxData('A');break;
			      case 0xdf:TxData('B');break;
			      case 0xbf:TxData('C');break;
			      case 0x7f:TxData('D');break;
			 			default:P0=0xff;TxBuf[0]=0xff; 
			 				
				  } 
		         
			  SetTxMode();																					// Set Tx Mode
			  TxPacket();																						// Transmit Tx buffer data
				TxBuf[0] = 0xff;
				SetRxMode();																					// Set nRF905 in Rx mode
				tf=0;
				Delay(500);
				P1=0xff;
		 }

         //=====================等待NRF905接收
	   if (DR)			// If recive data ready... 
	   RxPacket();			// ... recive data
	 //=====================从串口接收到数据
	 if (rsbrf!=0)
	  {
		 switch(rsbrf)
		   {
		   	
		   case 'A':P1=0xef;TxBuf[0]=0xef;delayf=1;break;
			 case 'B':P1=0xdf;TxBuf[0]=0xdf;delayf=1;break;
			 case 'C':P1=0xbf;TxBuf[0]=0xbf;delayf=1;break;
			 case 'D':P1=0x7f;TxBuf[0]=0x7f;delayf=1;break;
		 	 default:P0=0xff;TxBuf[0]=0xff; 
		 	 
			}
			
			
	  //====================NRF905发送串口接收到的相应的字符 
	   if(TxBuf[0]!=0xff)
	     if(TxBuf[0]!=0x00)
		  {
		    SetTxMode();																		// Set Tx Mode
		    TxPacket();																			// Transmit Tx buffer data
			TxBuf[0] = 0xff;
			SetRxMode();																			// Set nRF905 in Rx mode
		  }	
		  
		  			            	
	 //=====================
		 if(delayf==1)
		   {
		     Delay(500);
			 delayf = 0 ;
			 P1 = 0xff ;
		   }
	   }
	 //=====================
	 if(rsbrf!=0)
	   {
	     TxData(rsbrf);
		 rsbrf = 0 ;
	   }
	 //=====================


}
}




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<RxTxConf.n;i++)													// Write configration words  写放配置字
	{
		SpiWrite(RxTxConf.buf[i]);
	}
	CSN=1;																							// Disable Spi
}





void SpiWrite(uchar  byte)
{
	uchar i;	
	DATA_BUF=byte;																			// Put function's parameter into a bdata variable		
	for (i=0;i<8;i++)																		// Setup byte circulation bits
	{	
		
		if (flag)																					// Put DATA_BUF.7 on data line
			MOSI=1;
		else
			MOSI=0;
		SCK=1;																						// Set clock line high
		DATA_BUF=DATA_BUF<<1;															// Shift DATA_BUF
		SCK=0;																						// Set clock line low 
	}	
}





uchar SpiRead(void)
{
	uchar i;	
	for (i=0;i<8;i++)																		// Setup byte circulation bits
	{	
		DATA_BUF=DATA_BUF<<1;															// Right shift DATA_BUF
		SCK=1;																						// Set clock line high
		if (MISO)
			flag1=1;																				// Read data
		else
			flag1=0;
							
		
		SCK=0;																						// Set clock line low
	}
	return DATA_BUF;																		// Return function parameter
}





void TxPacket(void)
{
	uchar i;
	//Config905();				
	CSN=0;																						// Spi enable for write a spi command	
	SpiWrite(WTP);																		// Write payload command
	for (i=0;i<32;i++)
	{
		SpiWrite(TxBuf[i]);															// Write 32 bytes Tx data
	}
	CSN=1;																						// Spi disable						
	Delay(1);
	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(RxTxConf.buf[i+5]);
	}	
	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
}





void RxPacket(void)
{
	uchar i;	
	TRX_CE=0;																					// Set nRF905 in standby mode	
	CSN=0;																						// Spi enable for write a spi command
	SpiWrite(RRP);																		// Read payload command	
	for (i=0;i<32;i++)
	{
		RxBuf[i]=SpiRead();															// Read data and save to buffer		
	}
	CSN=1;																						// Disable spi
	while(DR||AM);	
	P1=	RxBuf[0];																			// Buffer[0] output from P0 port...
	TRX_CE=1;
	//xx=(RxBuf[0]>>4)&0x0f;
	//TxData(xx);
	
	
	
	
	 //=====================
	   	  switch(P1)
	    {
	      case 0xef:TxData('A');;break;
	  	  case 0xdf:TxData('B');;break;
		  case 0xbf:TxData('C');;break;
		  case 0x7f:TxData('D');;break;
	 	  //default:P0=0xff;TxBuf[0]=0xff; 
		 } 
	 //=====================
	 
	 
	  
	Delay(500);																				// ...light led
	P1=0xff;																					// Close led								
}






void SetTxMode(void)				
{	
	TX_EN=1;
	TRX_CE=0;
	Delay(1); 																			// delay for mode change(>=650us)
}				





void SetRxMode(void)
{
	TX_EN=0;
	TRX_CE=1;
	Delay(1); 																			// delay for mode change(>=650us)				
}