#ifndef SPI_MASTER_H
#define SPI_MASTER_H
/*================================================================================================

 spi.h								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 SPI interface. Basic design by CM. Modifyed and extended by JN 
			  for project SiWiCom 2006
 
 SPI configuration is done by hardware.h witch must contain definitions for:
 (X=letter i.e PORTX=PORTB, n=number i.e PXn=PB4)		

		SPI_PORT	PORTX 	(Example: #define SPI_PORT	PORTB)		// PORTB as SPI-port
 		SPI_DDR		DDRX	(Example: #define SPI_DDR	DDRB) 		// DDRB as direction for SPI pindirection
 		
		MOSI		PXn 	(Example: #define MOSI	PB3)			// Master Out - Slave In	
		MISO		PXn		(Example: #define MISO	PB4)			// Master In - Slave Out
		SCK			PXn		(Example: #define SCK	PB5				// Serial Clock
		
		Processor as SPI-master or SPI-slave, example:
		#define _SPI_MASTER_
		//#define _SPI_SLAVE_

		If processor is defined as _SPI_MASTER_, Chip select port(s) (at least one, max 8) must be asigned as: 
		#define SPI_CS0_PORT	PORTX
					.
					.
					.
		#define SPI_CS7_PORT	PORTX


		and SPI direction for the above asigned port(s) as:
		#define SPI_CS0_DDR		DDRX
					.
					.
					.
		#define SPI_CS7_DDR		DDRX
		
		and SPI pin(s) used for chip select as:
			
		#define SPI_CS0			PXn
					.
					.
					.
		#define SPI_CS7			PXn
	
================================================================================================*/
#define SPI_CS0_NR		0
#define SPI_CS1_NR		1
#define SPI_CS2_NR		2
#define SPI_CS3_NR		3
#define SPI_CS4_NR		4
#define SPI_CS5_NR		5
#define SPI_CS6_NR		6
#define SPI_CS7_NR		7
/*================================================================================================
 Functions
================================================================================================*/
/*================================================================================================
 spiWrite
 
 Description: Write data to SPI.

 Input: data to send
 Return: -
------------------------------------------------------------------------------------------------*/
void spiWrite(uint8_t data);
/*================================================================================================
 spiRead
 
 Description: Read data from SPI buffer.

 Input: -
 Return: SPI-value
------------------------------------------------------------------------------------------------*/
uint8_t spiRead(void);
/*================================================================================================
 spiSetHighSpeed
 
 Description: Set datatrasfer to fc/4.

 Input: -
 Return: -
------------------------------------------------------------------------------------------------*/
void spiSetHighSpeed(void);
/*================================================================================================
 spiSetLowSpeed
 
 Description: Set datatrasfer to fc/64.

 Input: -
 Return: -
------------------------------------------------------------------------------------------------*/
void spiSetLowSpeed(void);
/*================================================================================================
 spiInit
 
 Description: Init SPI interface as master or slave depending on the "hardware.h" configuration.

 Input: -
 Return: -
------------------------------------------------------------------------------------------------*/
void spiInit(void);
/*================================================================================================
 spiChipSelect
 
 Description: Select device for communication via SPI. Protects chipselect on two devices at the 
 same time and secure that chosen chipselect is an initialised legal channel.

 Input: uint8_t (The number of the desired chipselect. (Between 0 and 7) )
 Return: -
------------------------------------------------------------------------------------------------*/
void spiChipSelect(uint8_t chipselect);
/*================================================================================================
spiChipDeSelect
 
 Description: Deselect all SPI channels
 Input: -
 Return: -
------------------------------------------------------------------------------------------------*/
void spiChipDeSelect(void);
/*================================================================================================
 End
================================================================================================*/
#endif // SPI_MASTER_H