jieshou.c

利用NRF905无线通信模块进行RS232通信

#include <reg52.h>
#include <ABSACC.h>
#include <intrins.h>
#include <stdio.h>
#define uint unsigned int                     //0 ~ 255
#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;
//--------------------------------------------------------------------------------------------------------------
#define TxRxBuf_Len 32
unsigned char TxRxBuffer[TxRxBuf_Len];
//---------------------------------------------------------------------------------------------------------------
sbit	TXEN=P1^0;
sbit	TRX_CE=P3^2;
sbit	PWR=P1^1;
sbit	MISO=P1^6;
sbit	MOSI=P1^5;
sbit	SCK=P1^7;
sbit	CSN=P1^3;
sbit	AM=P1^4;
sbit	DR=P3^3;
sbit	CD=P1^2;
//------------------------------------------------NRF905寄存器配置----------------------------------------------
unsigned char idata RFConf[11]=
{
  0x00,                             //配置命令//
  0x4c,
  0x0c,
  0x44,0x04,0x04,
  0xcc,0xcc,0xcc,0xcc,
  0x58,                            //CRC充许，8位CRC校验，外部时钟信号不使能，16M晶振
};
//-------------------------------------------------------------------------------------------------------------
#define WC		0x00
#define RC		0x10
#define WTP		0x20
#define RTP		0x21
#define WTA		0x22
#define RTA		0x23
#define RRP		0x24
//-----------------------------------------------延时------------------------------------------------------------
void Delay(uchar n)
{
	uint k;
	while(n--)
	for(k=0;k<8;k++);
}
//-----------------------------------------------SPI读----------------------------------------------------------------
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--------------------------------------------------------
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
}
//-----------------------------------------------设置接收模式-------------------------------------------------------------
void SetRxMode(void)
{
	TXEN=0;
	TRX_CE=1;
	Delay(1); 					// delay for mode change(>=650us)
}
//-----------------------------------------------判断接收状态------------------------------------------------------------------
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;
	}
}
//--------------------------------------------读数据----------------------------------------------------------------------
void RxPacket(void)							//读数据
{
	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++)
	{    
		TxRxBuffer[i]=SpiRead();		// Read data and save to buffe       
	}
	CSN=1;
          Delay(10);
	TRX_CE=1;							
}
//--------------------------------------------------接收数据-------------------------------------------------------------
void  RX(void)
{
          SetRxMode();			// Set nRF905 in Rx mode
		  //Delay(10000);
          while (CheckDR()==0);
         //Delay(10000);
		Delay(10);
	  	  RxPacket();
         //Delay(10000);			// Recive data by nRF905
		 Delay(10);
}
//--------------------------------------------------串口初始化----------------------------------------------------------
void StartUART( void )
{  							//波特率4800
     SCON = 0x50;
     TMOD = 0x20;
     TH1 = 0xFA;
     TL1 = 0xFA;
     PCON = 0x00;
     TR1 = 1;
}
//--------------------------------------------------串口接收-----------------------------------------------------------
void R_S_Byte(uchar R_Byte)
{	
	 SBUF = R_Byte;  
     while( TI == 0 );				//查询法
  	 TI = 0;
     
}
//------------------------------------------------------------------------------------------------------------------------
void main(void)
{
        StartUART();
        nRF905Init();
     	Config905();
	while(1)
	{
		char i;
		RX();
		Delay(10);
		CSN=0;	
		for(i=0;i<4;i++)
		{
		R_S_Byte(TxRxBuffer[i]);
		Delay(200);
		Delay(200);
		Delay(200);
		}
		CSN=1;
		Delay(1);
	}
}