WhyCan Forum(哇酷开发者社区)

void SI4432_INIT(void)
{				

	SPI_Read(0x03);	
	SPI_Read(0x04);
	
	lcd_write_text("start", 10,0,0);
	
	phyWrite(0x07, 0x80);   //reset register values to default

	SPI_Read(0x03);	
	SPI_Read(0x04);

	
	SPI_Read(0x03);	
	SPI_Read(0x04);
	
	//////////////////435.355MHZ 设定///////////////////////////////////////////////////////////////////////
	phyWrite(0x75, 0x53);  // set frequency band
	phyWrite(0x76, 0x85);  // set nominal carrier frequency 1
	phyWrite(0x77, 0xe0);  // set nominal carrier  frequency 0
	//////////////////////////////////////////////////////////////////////////////////////////////////////
		
	///////////////////1.2kbps 设定//////////////////////////////////////////////////////////////////////
	phyWrite(0x6e, 0x09);     //tx data rate
	phyWrite(0x6f, 0xd5);     // tx data rate
	///////////////////////////////////////////////////////////////////////////////////////////////////////
	
	
	//////////////////////////////频率偏差/////////////////////////////////////////////////////////////////////
	phyWrite(0x70, 0x2c); // manchester coding disabled
	phyWrite(0x71, 0x23); // FIFO mode, GFSK modulated                      
	phyWrite(0x72, 0x10);  // tx deviation 10KHz  
	///////////////////////////////////////////////////////////////////////////////////////////////////////////
	
	/////////////////////////////频率偏移////////////////////////////////////////////////////////////////////
	phyWrite(0x73, 0x00); //no frequency offset
	phyWrite(0x74, 0x00); // no frequency offset
	///////////////////////////////////////////////////////////////////////////////////////////////////////////
	
	
	phyWrite(0x7a, 0x0a);
	phyWrite(0x79, 0x01);
	
	phyWrite(0x07, 0x01);   // 进入ready模式 

	
	phyWrite(0x09, 0x7f);    // 晶振精度 12ppm

	phyWrite(0x0b, 0xea);    // SI4432 GPIO 0 （无视不使用）
	phyWrite(0x0c, 0xea);    // SI4432 GPIO 1 （无视不使用）        
	phyWrite(0x0d, 0xf4);    // SI4432 GPIO 2 （无视不使用）
        
  

	phyWrite(0x6d, 0x19);  // tx power 18dbm			
     


              
	phyWrite(0x30, 0xac);   // 使用PH+FIFO mode,CRC使能
                                         
	phyWrite(0x32, 0x00);  // byte0, header control 
	phyWrite(0x33, 0x02);//  使用同步字3,2

                
	phyWrite(0x34, 0x08);  // 前导码长度 25个字节
	phyWrite(0x35, 0x42);  // 前导码侦测控制1(不太清楚怎么设)
				
	phyWrite(0x36, 0x2d);  //同步字3 2D
	phyWrite(0x37, 0xD4);  //同步字2 D4
	phyWrite(0x38, 0x00);  //同步字1
	phyWrite(0x39, 0x00);  //同步字0

	phyWrite(0x3a, 0x00);   // transmit header 3
	phyWrite(0x3b, 0x00);  // transmit header 2
	phyWrite(0x3c, 0x00);   // transmit header 1
	phyWrite(0x3d, 0x00);   // transmit header 0

	phyWrite(0x3f, 0x00);   //check header 3
	phyWrite(0x40, 0x00);   //check header 2
	phyWrite(0x41, 0x00);   //check header 1
	phyWrite(0x42, 0x00);  //check header 0


	phyWrite(0x43, 0xff);  //header value 3
	phyWrite(0x44, 0xff);  //header value 2
	phyWrite(0x45, 0xff);  //header value 1
	phyWrite(0x46, 0xff);  //header value 0
  
}


void txdata(void)
{
	unsigned char txdata[9];
	
	//unsigned char i;
	//tx test data is use to test the sended out signal
	lcd_write_text("start tx", 10,0,0);



	for (nCount=0 ; nCount<8; nCount++)
	{
		txdata[nCount] = 0x30 + nCount ;
	}
	//Flag.is_tx = 1
	//delay(100);
	
	phyWrite(0x07, 0x01); // SI4432进入准备模式
	delay(10);
	
	phyWrite(0x08, 0x01);  // 清空tx fifo
	delay(10);
	phyWrite(0x08, 0x00);  // 清空tx fifo
	delay(10);
	//phyWrite(0x08, 0x02);  // 使能自动切传输与切换
	//delay(10);

	phyWrite(0x3e, 0x08);    // 送出8个字节 payload length, the number of bytes you are going to send

	for (xCount = 0; xCount<8; xCount++)
	{
		phyWrite(0x7f, txdata[xCount]); 	// put the data intended to send out into loading area, fifo loading area
		delay(10);
		
	}
	
	phyWrite(0x05, 0x04);	// 发出packet sent interrupt
	phyWrite(0x06, 0x00);// disable interrupt
	
	phyWrite(0x07, 0x09);  // 打包tx fifo里的字节然后发出 pack tx data and send
	delay(10);
	
	phyWrite(0x05, 0x03);	// signal valid packed sent
	phyWrite(0x06, 0x00);// disable interrupt
	
	SPI_Read(0x03);		//重置interrupt
	SPI_Read(0x04);   // 重置interrupt

	lcd_write_text("TX DoNE", 10,0,0);
	phyWrite(0x07, 0x01);
	delay(20);
	//phyWrite(0x07, 0x05);	 //SI4432转接收模式
	//delay(1);
	

}