s8051.c

芯科rf资料

/*
** ============================================================================
**
** 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"

/*+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
  +
  + 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 = 1;
    
}


/*+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
  +
  + FUNCTION NAME:  uint8 spi_read_write_byte(uint8 spi_in)
  +
  + DESCRIPTION:    Send and receive 8bits on the SPI port (MSB first)
  +
  +	INPUT:			8bit SPI data
  +
  + RETURN:         8bit received data
  +
  + NOTES:          void init_pic(void) function has to be called before!
  +
  +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
uint8 spi_read_write_byte(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:  uint16 send_control_command(uint16 control_command)
  +
  + DESCRIPTION:    Send and receive 16bit EZRadio control command 
  +
  +	INPUT:			16bit EZRadio control command
  +
  + RETURN:         the received answer from the EZRadio
  +
  + NOTES:          None
  +
  +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
uint16 send_control_command(uint16 control_command)
{
	xdata uint16 temp16;
	
	
	RF_NSEL = 0;						
	temp16 = (uint16)(spi_read_write_byte( (uint8)((control_command & 0xFF00) >> 8) ));
	temp16 <<= 8;
	temp16 += (uint16)(spi_read_write_byte( (uint8)(control_command & 0x00FF) ));
	RF_NSEL = 1;

	return temp16;
}
/*+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
  +
  + FUNCTION NAME:  void delay_ms(uint8 delay)
  +
  + DESCRIPTION:    wait the predefined ms
  +
  +	INPUT:			length of the delay in ms (1 ... 255)
  +
  + RETURN:         None
  +
  + NOTES:          None
  +
  +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
void delay_ms(uint8 delay)
{
	
	xdata uint8  j;
	xdata uint16 i;

	if( delay == 0 )
	{
		return;
	}

	for(j=0;j<delay;j++)
	{
		for(i=0;i<640;i++);
	}
	
}
/*+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
  +
  + FUNCTION NAME:  void Timer2Init(void)
  +
  + DESCRIPTION:    initialize the Timer2  
  +
  +	INPUT:			None
  +
  + RETURN:         None
  +
  + NOTES:          None
  +
  +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
void Timer2Init(void)					//8051 Timer2 init					
{

   	CKCON &= ~0x60;                     // Timer2 uses SYSCLK/12
   	TMR2CN &= ~0x01;
  	TMR2CN = 0x04;                      // Enable Timer2 in auto-reload mode
  	ET2 = 1;                            // Timer2 interrupt enabled
	
	TMR2L = 0x1A;							
	TMR2RLL = 0x1A;
	TMR2H = 0x0A;
	TMR2RLH = 0x0A;

}