s8051.c

silicon wireless开发套件F920+Si4432原理图,源码

/*
** ============================================================================
**
** FILE
**  S8051.c
**
** DESCRIPTION
**  Contains all the low level, 8051 dependent functions		    
**
** CREATED
**  Silicon Laboratories Hungary Ltd
**
** COPYRIGHT
**  Copyright 2008 Silicon Laboratories, Inc.  
**	http://www.silabs.com
**
** ============================================================================
*/
#include "S8051.h"
#include "timers.h"

/*+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
  +
  + FUNCTION NAME:  void SetHwMasterSpi(void)
  +
  + DESCRIPTION:    Initialize the HW SPI port
  +
  +	INPUT:			data 
  +
  + RETURN:         None
  +
  + NOTES:          It doesn't control the nSEL pin
  +
  +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
void SetHwMasterSpi(void)
{
	
	SPI1CFG   = 0x40;					//Master SPI, CKPHA=0, CKPOL=0
	SPI1CN    = 0x00;					//3-wire Single Master, SPI enabled
	SPI1CKR   = (SYSCLK/(2*SPI_CLOCK))-1;
	SPI1EN 	 = 1;                     	// Enable SPI1 module

	//set nSEL pins to high
    RF_NSEL_PIN = 1;
    EE_NSEL_PIN = 1;
}


/*+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
  +
  + FUNCTION NAME:  void SpiWrite(uint8 spi_in)
  +
  + DESCRIPTION:    sends 8 length data through the SPI port
  +
  +	INPUT:			data 
  +
  + RETURN:         None
  +
  + NOTES:          It doesn't control the nSEL pin
  +
  +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
void SpiWrite(uint8 spi_in)
{
	SPI1DAT = spi_in;					//write data into the SPI register
	while( SPIF1 == 0);					//wait for sending the data
	SPIF1 = 0;							//clear interrupt flag
}

/*+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
  +
  + FUNCTION NAME:  uint8 SpiReadWrite(uint8 data)
  +
  + DESCRIPTION:    sends and read 8 length data through the SPI port
  +
  +	INPUT:			data 
  +
  + RETURN:         received byte
  +
  + NOTES:          it doesn't control the nSEL pin
  +
  +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
uint8 SpiReadWrite(uint8 spi_in)
{
	SPI1DAT = spi_in;					//write data into the SPI register
	while( SPIF1 == 0);					//wait for sending the data
	SPIF1 = 0;							//clear interrupt flag
	return SPI1DAT;						//read received bytes
}

/*+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
  +
  + FUNCTION NAME:  void SpiRfWriteWord(uint16 spi_in)
  +
  + DESCRIPTION:    sends 16 length data through the SPI port
  +
  +	INPUT:			data 
  +
  + RETURN:         None
  +
  + NOTES:          It controls the nSEL pin
  +
  +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
void SpiRfWriteWord(UU16 spi_in)
{
	RF_NSEL_PIN = 0;						
	SpiWrite( spi_in.U8[MSB] );
	SpiWrite( spi_in.U8[LSB] );
	RF_NSEL_PIN = 1;
}

/*+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
  +
  + FUNCTION NAME:  void SpiRfWriteAddressData(uint8 address, uint8 data1)
  +
  + DESCRIPTION:    sends 16 length data through the SPI port (address and data)
  +
  +	INPUT:			address - register address
  +					data 	- 8bit data 
  +
  + RETURN:         None
  +
  + NOTES:          It controls the nSEL pin
  +
  +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
void SpiRfWriteAddressData(uint8 address, uint8 d)
{
	RF_NSEL_PIN = 0;
	SpiWrite(address);
	SpiWrite(d);
	RF_NSEL_PIN = 1;
}

/*+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
  +
  + FUNCTION NAME:  uint16 SpiRfReadWriteWord(uint16 spi_in)
  +
  + DESCRIPTION:    sends and read 16 length data through the SPI port
  +
  +	INPUT:			data 
  +
  + RETURN:         received word
  +
  + NOTES:          it controls the nSEL pin
  +
  +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
UU16 SpiRfReadWriteWord(UU16 spi_in)
{
	UU16 temp16;

	RF_NSEL_PIN = 0;						
	temp16.U8[MSB] = SpiReadWrite( spi_in.U8[MSB] );
	temp16.U8[LSB] = SpiReadWrite( spi_in.U8[LSB] );
	RF_NSEL_PIN = 1;

	return temp16;
}

/*+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
  +
  + FUNCTION NAME:  uint8 SpiReadRegister(uint8 address)
  +
  + DESCRIPTION:    Read a register of the radio 
  +
  +	INPUT:			address - register address
  +
  + RETURN:         value of the register
  +
  + NOTES:          it controls the nSEL pin of the radio
  +
  +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
uint8 SpiRfReadRegister(uint8 address)
{
	uint8 temp8;

	RF_NSEL_PIN = 0;
	SpiReadWrite( address );
	temp8 = SpiReadWrite( 0x00 );
	RF_NSEL_PIN = 1;
	return temp8;
}

/*+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
  +
  + FUNCTION NAME:  uint16 SpiReadWriteAddressData(uint8 address, uint8 data1)
  +
  + DESCRIPTION:    sends and read 16 length data through the SPI port 
  +
  +	INPUT:			address - register address
  +					data 	- data
  +
  + RETURN:         received word
  +
  + NOTES:          it controls the nSEL pin
  +
  +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
UU16 SpiRfReadWriteAddressData(uint8 address, uint8 d)
{
	UU16 temp16;
	
	RF_NSEL_PIN = 0; 
	temp16.U8[MSB] = SpiReadWrite( address );
	temp16.U8[LSB] = SpiReadWrite( d );
	RF_NSEL_PIN = 1;

	return temp16;
}

/*+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
  +
  + FUNCTION NAME:  uint8 SpiReadByteFromTestcardEEPROM(uint16 address)
  +
  + DESCRIPTION:    read on byte from the EEPROM populated to the Testcard
  +	
  + RETURN:         value read out
  +
  +	INPUT:			address of the data in the EEPROM
  +
  + NOTES:          
  +
  +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
uint8 SpiReadByteFromTestcardEEPROM(uint16 address)
{
	xdata uint8 temp8;

	//select the EEPROM
	EE_NSEL_PIN = 0;
	//send instruction + address MSB
	SpiWrite(0x03);
	//send address upper byte
	SpiWrite((uint8)(address >> 8));
	//send address lower byte
	SpiWrite((uint8)(address & 0x00FF));
	//get data
	temp8 = SpiReadWrite(0x00);
	//release nSEL
	EE_NSEL_PIN = 1;

	return temp8;
}
/*+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
  +
  + FUNCTION NAME:  void SpiWriteByteToTestcardEEPROM(uint16 address, uint8 d)
  +
  + DESCRIPTION:    write one byte to the EEPROM populated on the Testcard
  +	
  + RETURN:         None
  +
  +	INPUT:			address, data
  +
  + NOTES:          
  +
  +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
void SpiWriteByteToTestcardEEPROM(uint16 address, uint8 d)
{
	UU16 temp;	

	EE_NSEL_PIN = 0;
	SpiWrite(0x06);
	EE_NSEL_PIN = 1; 
		
	//select the EEPROM
	EE_NSEL_PIN = 0;
	//send instruction + address MSB
	SpiWrite(0x02);
	//send address upper byte
	SpiWrite((uint8)(address  >> 8));
	//send address lower byte
	SpiWrite((uint8)(address & 0x00FF));
	//send data
	SpiWrite(d);
	//release nSEL
	EE_NSEL_PIN = 1;

	temp.U16 = 3334;
	StartTmr3(TMR3_12, temp, FALSE);			//wait 5ms after every write circule
	while( Tmr3Expired() == FALSE );
	
	EE_NSEL_PIN = 0;
	SpiWrite(0x04);
	EE_NSEL_PIN = 1; 
	


}
/*+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
  +
  + FUNCTION NAME:  void SpiReadSegmentFromTestcardEEPROM(uint16 star_address, uint8 * data, uint8 length)
  +
  + DESCRIPTION:    read a segment from the EEPROM populated to the Testcard
  +	
  + RETURN:         data stored in the place where the data pointer defined
  +
  +	INPUT:			start_address - starting address of the segment needs to be read out
  +					length - length of the segment needs to be read out
  +
  + NOTES:          
  +
  +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
void SpiReadSegmentFromTestcardEEPROM(uint16 start_address, uint8 * d, uint8 length)
{
	xdata uint8 temp8;

	//select the EEPROM
	EE_NSEL_PIN = 0;
	//send instruction + address MSB
	SpiWrite(0x03);
	//send address upper byte
	SpiWrite((uint8)(start_address >> 8));
	//send address lower byte
	SpiWrite((uint8)(start_address & 0x00FF));
	for(temp8=0;temp8<length;temp8++)
	{
		//get data
		*d++ = SpiReadWrite(0x00);
	}
	//release nSEL
	EE_NSEL_PIN = 1;
}