/*================================================================================================
 
 cc1100.c							SiWiCom copyright 2006  		 			v1.0 (2006-05-11)
							
 Name: Joakim Nilsson				E-mail: mail@jopin.se
 Name: Christoffer Martinsson		E-mail: cm@cmtec.se
 
 Description: Routines for cc1100. Uses usart.h as tranceiver

 Hardware configuration is done by hardware.h witch must contain definitions for:
 (X=letter i.e PORTX=PORTB, n=number i.e PXn=PB4)		

		GDO0		PXn 		(Example: #define GDO0			PC1)
		GDO0_PORT	PORTX 		(Example: #define GDO0_PORT		PORTC)		
 		GDO0_DDR	DDRX		(Example: #define GDO0_DDR		DDRC) 		
 		GDO0_PIN	PINX		(Example: #define GDO0_PIN		PINC)
		
		GDO2		PXn 		(Example: #define GDO2			PD3)
		GDO2_PORT	PORTX 		(Example: #define GDO2_PORT		PORTD)		
 		GDO2_DDR	DDRX		(Example: #define GDO2_DDR		DDRD) 		
 		GDO2_PIN	PINX		(Example: #define GDO2_PIN		PIND)
		
		CS_CC1100	SPI_CSX_NR 	(Example: #define CS_CC1100		SPI_CS0_NR)
		
================================================================================================*/
#include "hardware.h"

#include <util/delay.h>
#include <inttypes.h>
#include <avr/io.h>

#include "spi.h"
#include "cc1100.h"

/*================================================================================================
 Functions
================================================================================================*/
/*================================================================================================
 cc1100Select
 
 Description: Select cc1100 as slave
 Input: -
 Output: -
------------------------------------------------------------------------------------------------*/
void cc1100Select(void)
{
	spiChipSelect(CS_CC1100);
	while(SPI_PIN & (1<<MISO));
}
/*===============================================================================================
 cc1100DeSelect
 
 Description: DeSelect cc1100
 Input: -
 Output: -
------------------------------------------------------------------------------------------------*/
void cc1100DeSelect(void)
{
	spiChipDeSelect();
}
/*================================================================================================
 cc1100WriteBurstReg
 
 Description: Write to cc1100 registers in burst mode.
 
 Input: startAddr (Address to start writing)
		*regValueBuffer (data buffer contaning all data that should be written to cc1100)
		bufferSize (size of de data buffer)
		
 Output: -
------------------------------------------------------------------------------------------------*/
void cc1100WriteBurstReg(uint8_t startAddr, uint8_t *regValueBuffer, uint8_t bufferSize)
{
	cc1100Select();
	
	spiWrite(startAddr|(BURST<<6)|(WRITE<<7));
	
	uint8_t i;
	
	for(i = 0; i < bufferSize; i++)
	{
		spiWrite(regValueBuffer[i]);
	}
	
	cc1100DeSelect();
}
/*================================================================================================
 cc1100ReadBurstReg
 
 Description: read from cc1100 registers in burst mode.
 
 Input: startAddr (Address to start reading)
		*regValueBuffer (data buffer for storing all data read from the cc1100)
		bufferSize (size of de data buffer)
 Output: -
------------------------------------------------------------------------------------------------*/
void cc1100ReadBurstReg(uint8_t startAddr, uint8_t *regValueBuffer, uint8_t bufferSize)
{
	cc1100Select();
	
	spiWrite(startAddr|(BURST<<6)|(READ<<7));
	
	uint8_t i;
	
	for(i = 0; i < bufferSize; i++)
	{
		spiWrite(0);
		regValueBuffer[i] = spiRead();
	}
	
	cc1100DeSelect();
}
/*================================================================================================
 cc1100WriteReg
 
 Description: Write to a cc1100 register.
 
 Input: regAddr (register address)
		regValue (new rigiter value)
		
 Output: -
------------------------------------------------------------------------------------------------*/
void cc1100WriteReg(uint8_t regAddr, uint8_t regValue)
{
	cc1100Select();
	
	spiWrite(regAddr|(NOBURST<<6)|(WRITE<<7));
	spiWrite(regValue);
	
	cc1100DeSelect();
}
/*================================================================================================
 cc1100ReadReg
 
 Description: Read from a cc1100 register.
 
 Input: regAddr (register address)
 Output: regiter value
------------------------------------------------------------------------------------------------*/
uint8_t cc1100ReadReg(uint8_t regAddr)
{
	uint8_t data;
	
	cc1100Select();
	
	spiWrite(regAddr|(NOBURST<<6)|(READ<<7));
	spiWrite(0);
	
	data = spiRead();
	
	cc1100DeSelect();
	
	return data;
}
/*===============================================================================================
 cc1100WriteCommand
 
 Description: Write a command to cc1100.
 Input: cmdAddr (command register address, in the range 0x30 - 0x3D)
 Output: -
------------------------------------------------------------------------------------------------*/
void cc1100WriteCommand(uint8_t cmdAddr)
{
	cc1100Select();

	spiWrite(cmdAddr);	//Command strobe (R/W bit=0 (WRITE), Burst bit=0=command strobes) 
	
	cc1100DeSelect();
}
/*================================================================================================
 cc1100ReadStatusReg
 
 Description: Read status register from cc1100
 
 Input: regAddr (register address)
 Output: regiter value
------------------------------------------------------------------------------------------------*/
uint8_t cc1100ReadStatusReg(uint8_t regAddr)
{
	uint8_t data;
	
	cc1100Select();
	
	spiWrite(regAddr|(BURST<<6)|(READ<<7));
	spiWrite(0);
	
	data = spiRead();
	
	cc1100DeSelect();
	
	return data;
}
/*=================================================================================================
 END
=================================================================================================*/