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/* ----------------------------------------------------------------------------
* ATMEL Microcontroller Software Support
* ----------------------------------------------------------------------------
* Copyright (c) 2009, Atmel Corporation
*
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* - Redistributions of source code must retain the above copyright notice,
* this list of conditions and the disclaimer below.
*
* Atmel's name may not be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* DISCLAIMER: THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
* DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
* OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
* ----------------------------------------------------------------------------
*/
/**
* \file
*
* Interface for Serial Peripheral Interface (SPI) controller.
*
*/
#ifndef _SPI_
#define _SPI_
/*----------------------------------------------------------------------------
* Headers
*----------------------------------------------------------------------------*/
#include "chip.h"
/*----------------------------------------------------------------------------
* Macros
*----------------------------------------------------------------------------*/
/**
*
* Here are several macros which should be used when configuring a SPI
* peripheral.
*
* \section spi_configuration_macros SPI Configuration Macros
* - \ref SPI_PCS
* - \ref SPI_SCBR
* - \ref SPI_DLYBS
* - \ref SPI_DLYBCT
*/
/** Calculate the PCS field value given the chip select NPCS value */
#define SPI_PCS(npcs) ((~(1 << npcs) & 0xF) << 16)
/** Calculates the value of the CSR SCBR field given the baudrate and MCK. */
#define SPI_SCBR(baudrate, masterClock) ((uint32_t) (masterClock / baudrate) << 8)
/** Calculates the value of the CSR DLYBS field given the desired delay (in ns) */
#define SPI_DLYBS(delay, masterClock) ((uint32_t) (((masterClock / 1000000) * delay) / 1000) << 16)
/** Calculates the value of the CSR DLYBCT field given the desired delay (in ns) */
#define SPI_DLYBCT(delay, masterClock) ((uint32_t) (((masterClock / 1000000) * delay) / 32000) << 24)
/*------------------------------------------------------------------------------ */
#ifdef __cplusplus
extern "C" {
#endif
/*----------------------------------------------------------------------------
* Exported functions
*----------------------------------------------------------------------------*/
extern void SPI_Enable( Spi* spi ) ;
extern void SPI_Disable( Spi* spi ) ;
extern void SPI_EnableIt( Spi* spi, uint32_t dwSources ) ;
extern void SPI_DisableIt( Spi* spi, uint32_t dwSources ) ;
extern void SPI_Configure( Spi* spi, uint32_t dwId, uint32_t dwConfiguration ) ;
extern void SPI_SetMode( Spi* spi, uint32_t dwConfiguration );
extern void SPI_ChipSelect( Spi* spi, uint8_t cS);
extern void SPI_ReleaseCS( Spi* spi );
extern void SPI_ConfigureNPCS( Spi* spi, uint32_t dwNpcs, uint32_t dwConfiguration ) ;
extern void SPI_ConfigureCSMode( Spi* spi, uint32_t dwNpcs, uint32_t bReleaseOnLast );
extern uint32_t SPI_Read( Spi* spi ) ;
extern void SPI_Write( Spi* spi, uint32_t dwNpcs, uint16_t wData ) ;
extern void SPI_WriteLast( Spi* spi, uint32_t dwNpcs, uint16_t wData );
extern uint32_t SPI_GetStatus( Spi* spi ) ;
extern uint32_t SPI_IsFinished( Spi* pSpi ) ;
#ifdef __cplusplus
}
#endif
#endif /* #ifndef _SPI_ */
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