main_sdbc_dk3.c.svn-base

Si4432-T-B1版本资料.rar

/*
** ============================================================================
**
** FILE
**  main.c
**
** DESCRIPTION
**  This is the main file of the project.	    
**  HW platform SDB with C8051F93x Silabs MCU 
**
** CREATED
**  Silicon Laboratories Hungary Ltd
**
** COPYRIGHT
**  Copyright 2009 Silicon Laboratories, Inc.  
**	http://www.silabs.com
**
** ============================================================================
*/

								/* ======================================================== *
								 *									INCLUDE					*
							 	 * ======================================================== */


#include "C8051F930_defs.h"
#include "compiler_defs.h"

							/* ================================================================ *
							 * C8051F930 Pin definitions for Software Development Board         *
							 * 					(using compiler_def.h macros) 					*
							 *	=============================================================== */	

SBIT(NSS, SFR_P1, 3);
SBIT(NIRQ, SFR_P0, 6);
SBIT(PB1, SFR_P0, 0);
SBIT(PB2, SFR_P0, 1);
SBIT(PB3, SFR_P2, 0);
SBIT(PB4, SFR_P2, 1);
SBIT(LED1, SFR_P1, 4);
SBIT(LED2, SFR_P1, 5);
SBIT(LED3, SFR_P1, 6);
SBIT(LED4, SFR_P1, 7);

//One out of these definitions has to be uncommented which tells to the compiler what kind 
//of Testcard is plugged into the Software Development board
#define SEPARATE_RX_TX
//#define ANTENNA_DIVERSITY
//#define ONE_SMA_WITH_RF_SWITCH


								/* ======================================================== *
								 *							Function PROTOTYPES				* 
								 * ======================================================== */
//MCU initialization
void MCU_Init(void);
//SPI functions						
void SpiWriteRegister (U8, U8);
U8 SpiReadRegister (U8);


void main(void)
{
	U8 ItStatus1,ItStatus2;
	U16 delay;

	//Initialize the MCU: 
	//	- set IO ports for the Software Development board
	//	- set MCU clock source
	//	- initialize the SPI port 
	//	- turn off LEDs
	MCU_Init();
							/* ======================================================== *
							 *						Initialize the Si4431 ISM chip		* 
							 * ======================================================== */
	//SW reset   
   	SpiWriteRegister(0x07, 0x80);														//write 0x80 to the Operating & Function Control1 register 
	//wait for chip ready interrupt from the radio (while the nIRQ pin is high)
	while ( NIRQ == 1);  
	//read interrupt status registers to clear the interrupt flags and release NIRQ pin
	ItStatus1 = SpiReadRegister(0x03);													//read the Interrupt Status1 register
	ItStatus2 = SpiReadRegister(0x04);													//read the Interrupt Status2 register
						
							/*set the physical parameters*/
	//set the center frequency to 915 MHz
	SpiWriteRegister(0x75, 0x75);														//write 0x75 to the Frequency Band Select register             
	SpiWriteRegister(0x76, 0xBB);														//write 0xBB to the Nominal Carrier Frequency1 register
	SpiWriteRegister(0x77, 0x80);  														//write 0x80 to the Nominal Carrier Frequency0 register
	
	//set the desired TX data rate (9.6kbps)
	SpiWriteRegister(0x6E, 0x4E);														//write 0x4E to the TXDataRate 1 register
	SpiWriteRegister(0x6F, 0xA5);														//write 0xA5 to the TXDataRate 0 register
	SpiWriteRegister(0x70, 0x2C);														//write 0x2C to the Modulation Mode Control 1 register

	//set the desired TX deviatioin (+-45 kHz)
	SpiWriteRegister(0x72, 0x48);														//write 0x48 to the Frequency Deviation register 
	
	//set the TX power to +13 dBm
	SpiWriteRegister(0x6D, 0x0F);														//write 0x0F to the TX Power register 

							/*set the packet structure and the modulation type*/
	//set the preamble length to 10bytes if the antenna diversity is used and set to 5bytes if not 
#ifdef ANTENNA_DIVERSITY
	SpiWriteRegister(0x34, 0x18); 														//write 0x18 to the Preamble Length register 	
#else
	SpiWriteRegister(0x34, 0x0C);														//write 0x0C to the Preamble Length register
#endif

	//Disable header bytes; set variable packet length (the length of the payload is defined by the
	//received packet length field of the packet); set the synch word to two bytes long
	SpiWriteRegister(0x33, 0x02 );														//write 0x02 to the Header Control2 register    
	
	//Set the sync word pattern to 0x2DD4
	SpiWriteRegister(0x36, 0x2D);														//write 0x2D to the Sync Word 3 register
	SpiWriteRegister(0x37, 0xD4);														//write 0xD4 to the Sync Word 2 register

	//enable the TX packet handler and CRC-16 (IBM) check
	SpiWriteRegister(0x30, 0x0D);														//write 0x0D to the Data Access Control register
	//enable FIFO mode and GFSK modulation
	SpiWriteRegister(0x71, 0x63);														//write 0x63 to the Modulation Mode Control 2 register

#ifdef ANTENNA_DIVERSITY
	//enable the antenna diversity mode
	SpiWriteRegister(0x08, 0x80);														//write 0x80 to the Operating Function Control 2 register
#endif								 					

							/*set the GPIO's according the testcard type*/
#ifdef ANTENNA_DIVERSITY
   	SpiWriteRegister(0x0C, 0x17);														//write 0x17 to the GPIO1 Configuration(set the Antenna 1 Switch used for antenna diversity )
	SpiWriteRegister(0x0D, 0x18);														//write 0x18 to the GPIO2 Configuration(set the Antenna 2 Switch used for antenna diversity ) 
#endif
#ifdef ONE_SMA_WITH_RF_SWITCH
   	SpiWriteRegister(0x0C, 0x12);														//write 0x12 to the GPIO1 Configuration(set the TX state)
	SpiWriteRegister(0x0D, 0x15);														//write 0x15 to the GPIO2 Configuration(set the RX state) 
#endif

							/*set the non-default Si4431 registers*/
	//set VCO and PLL	
	SpiWriteRegister(0x57, 0x01);														//write 0x01 to the Chargepump Test register													
	SpiWriteRegister(0x58, 0xC0);														//write 0xC0 to the Chargepump Current Trimming/Override register
	SpiWriteRegister(0x59, 0x00);														//write 0x00 to the Divider Current Trimming register 	
	SpiWriteRegister(0x5A, 0x01); 														//write 0x01 to the VCO Current Trimming register 
	//set Crystal Oscillator Load Capacitance register
	SpiWriteRegister(0x09, 0xD7);														//write 0xD7 to the CrystalOscillatorLoadCapacitance register
	      
	/*MAIN Loop*/
	while(1)
	{
		//Poll the port pins of the MCU to figure out whether the oush button is pressed or not
		if(PB1 == 0)
		{	
			//Wait for releasing the push button
			while( PB1 == 0 );
			//turn on the LED to show the packet transmission
			LED1 = 1; 																			
			/*SET THE CONTENT OF THE PACKET*/
			//set the length of the payload to 8bytes	
			SpiWriteRegister(0x3E, 8);													//write 8 to the Transmit Packet Length register		
			//fill the payload into the transmit FIFO
			SpiWriteRegister(0x7F, 0x42);												//write 0x42 ('B') to the FIFO Access register	
			SpiWriteRegister(0x7F, 0x55);												//write 0x55 ('U') to the FIFO Access register	
			SpiWriteRegister(0x7F, 0x54);												//write 0x54 ('T') to the FIFO Access register	
			SpiWriteRegister(0x7F, 0x54);												//write 0x54 ('T') to the FIFO Access register	
			SpiWriteRegister(0x7F, 0x4F);												//write 0x4F ('O') to the FIFO Access register	
			SpiWriteRegister(0x7F, 0x4E);												//write 0x4E ('N') to the FIFO Access register	
			SpiWriteRegister(0x7F, 0x31);												//write 0x31 ('1') to the FIFO Access register	
			SpiWriteRegister(0x7F, 0x0D);												//write 0x0D (CR) to the FIFO Access register	

			//Disable all other interrupts and enable the packet sent interrupt only.
			//This will be used for indicating the successfull packet transmission for the MCU
			SpiWriteRegister(0x05, 0x04);												//write 0x04 to the Interrupt Enable 1 register	
			SpiWriteRegister(0x06, 0x00);												//write 0x00 to the Interrupt Enable 2 register	
			//Read interrupt status regsiters. It clear all pending interrupts and the nIRQ pin goes back to high.
			ItStatus1 = SpiReadRegister(0x03);											//read the Interrupt Status1 register
			ItStatus2 = SpiReadRegister(0x04);											//read the Interrupt Status2 register

			/*enable transmitter*/
			//The radio forms the packet and send it automatically.
			SpiWriteRegister(0x07, 0x09);												//write 0x09 to the Operating Function Control 1 register

			/*wait for the packet sent interrupt*/
			//The MCU just needs to wait for the 'ipksent' interrupt.
			while(NIRQ == 1);
			//read interrupt status registers to release the interrupt flags
			ItStatus1 = SpiReadRegister(0x03);											//read the Interrupt Status1 register
			ItStatus2 = SpiReadRegister(0x04);											//read the Interrupt Status2 register

			//wait a bit for showing the LED a bit longer
			for(delay = 0; delay < 10000;delay++);
			//turn off the LED
			LED1 = 0; 	
		}

		//if the PB2 button pressed, blink the LED2	
		if(PB2 == 0)
		{	
			//wait for releaze the button
			//Wait for releasing the push button
			while( PB2 == 0 );
			//turn on the LED to show the packet transmission
			LED2 = 1; 																			
			/*SET THE CONTENT OF THE PACKET*/
			//set the length of the payload to 8bytes	
			SpiWriteRegister(0x3E, 8);													//write 8 to the Transmit Packet Length register		
			//fill the payload into the transmit FIFO
			SpiWriteRegister(0x7F, 0x42);												//write 0x42 ('B') to the FIFO Access register	
			SpiWriteRegister(0x7F, 0x55);												//write 0x55 ('U') to the FIFO Access register	
			SpiWriteRegister(0x7F, 0x54);												//write 0x54 ('T') to the FIFO Access register	
			SpiWriteRegister(0x7F, 0x54);												//write 0x54 ('T') to the FIFO Access register	
			SpiWriteRegister(0x7F, 0x4F);												//write 0x4F ('O') to the FIFO Access register	
			SpiWriteRegister(0x7F, 0x4E);												//write 0x4E ('N') to the FIFO Access register	
			SpiWriteRegister(0x7F, 0x32);												//write 0x31 ('2') to the FIFO Access register	
			SpiWriteRegister(0x7F, 0x0D);												//write 0x0D (CR) to the FIFO Access register	

			//Disable all other interrupts and enable the packet sent interrupt only.
			//This will be used for indicating the successfull packet transmission for the MCU
			SpiWriteRegister(0x05, 0x04);												//write 0x04 to the Interrupt Enable 1 register	
			SpiWriteRegister(0x06, 0x00);												//write 0x00 to the Interrupt Enable 2 register	
			//Read interrupt status regsiters. It clear all pending interrupts and the nIRQ pin goes back to high.
			ItStatus1 = SpiReadRegister(0x03);											//read the Interrupt Status1 register
			ItStatus2 = SpiReadRegister(0x04);											//read the Interrupt Status2 register

			/*enable transmitter*/
			//The radio forms the packet and send it automatically.
			SpiWriteRegister(0x07, 0x09);												//write 0x09 to the Operating Function Control 1 register

			/*wait for the packet sent interrupt*/
			//The MCU just needs to wait for the 'ipksent' interrupt.
			while(NIRQ == 1);
			//read interrupt status registers to release the interrupt flags
			ItStatus1 = SpiReadRegister(0x03);											//read the Interrupt Status1 register
			ItStatus2 = SpiReadRegister(0x04);											//read the Interrupt Status2 register

			//wait a bit for showing the LED a bit longer
			for(delay = 0; delay < 10000;delay++);
			//turn off the LED
			LED2 = 0; 	
		}		
		//if the PB3 button pressed, blink the LED3