fasong.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
#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
//-----------------------------------------SPI指令---------------------------------------------------------------
#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 4
unsigned char TxRxBuf[TxRxBuf_Len]=
{
0x29,0x30,0x31,0x32,
};
//-----------------------------------------NRF905配置口定义-------------------------------------------------------------
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,                             //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32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
};
//----------------------------------------------------------------------------------------------------------------
code TxAddress[4]={0xcc,0xcc,0xcc,0xcc};
//--------------------------------------延时---------------------------------------------------------------------
static void Delay(uchar n)
{
	uint i;
	while(n--)
	for(i=0;i<80;i++);
}

//-----------------------------------------------SPI读------------------------------------------------------
unsigned char SpiRead(void)
{
	unsigned char i;
	for (i=0;i<8;i++)
	{
		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
}
//---------------------------------------打包待发送数据----------------------------------------------------------
void TxPacket(void)
{
	uchar i;
	//Config905();
	CSN=0;
	SpiWrite(WTP);				// Write payload command
	for (i=0;i<4;i++)
	{
		SpiWrite(TxRxBuf[i]);		// Write 32 bytes Tx data
	}// Spi enable for write a spi command
	CSN=1;
	Delay(1);						// Spi disable
	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(TxAddress[i]);
	}
	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
}
//-----------------------------------------------------设置发送模式--------------------------------------------------
void SetTxMode(void)
{
	TRX_CE=0;
	TXEN=1;
	Delay(1); 					// delay for mode change(>=650us)
}
//-----------------------------------------------------发送数据--------------------------------------------------
void TX(void)
{
     SetTxMode();// Set nRF905 in Tx
	 TxPacket();// Send data by nRF905
}
void main(void)
{
        nRF905Init();
     	Config905();
        while(1)
		{
         TX();
		}
}