jieshou.c

NRF905-915频段无线232通讯程序

#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
////////////////
#define WC		0x00
#define RC		0x10
#define WTP		0x20
#define RTP		0x21
#define WTA		0x22
#define RTA		0x23
#define RRP		0x24
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;
///////////////////////////////////////////////////////
//RF寄存器配置//
unsigned char idata RFConf[11]=
{
  0x00,                             //配置命令//
   0x28,                             //CH_NO,配置频段在915MHZ
  0x0E,                             //输出功率为10db,不重发，节电为正常模式
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
};
bit lcdbit;
///////////80us延时/////////////////
void Delay(uchar n)
{
	uint k;
	while(n--)
	for(k=0;k<8;k++);
}
///////////////
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;						// 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
}
void SetRxMode(void)
{
	TXEN=0;
	TRX_CE=1;
	Delay(1); 					// delay for mode change(>=650us)
}

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;
	}
}
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);
  // Delay(10000);
   // Delay(10000);			// Read payload command
	for (i = 0 ;i < 4 ;i++)
	{      // Delay(10000);
          //   Delay(10000);
          //   Delay(10000);
         //    Delay(10000); 
		TxRxBuffer[i]=SpiRead();		// Read data and save to buffer
           // Delay(10000);
            //    Delay(10000);
            //    Delay(10000);         
	}
	CSN=1;
          Delay(10);
		// Delay(10);
	TRX_CE=1;							
}
////////////////
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);
}
void StartUART( void )
{  							//波特率4800
     SCON = 0x50;
     TMOD = 0x20;
     TH1 = 0xFA;
     TL1 = 0xFA;
     PCON = 0x00;
     TR1 = 1;
}
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++)
		{
	//	Delay(1000);
	//	Delay(10);
		P0=TxRxBuffer[3];
		R_S_Byte(TxRxBuffer[i]);
	//	Delay(10);
		}
		CSN=1;
		Delay(1);
	}
}