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/* ---------------------------------------------------------------------------- */
/* Atmel Microcontroller Software Support */
/* SAM Software Package License */
/* ---------------------------------------------------------------------------- */
/* Copyright (c) 2015, Atmel Corporation */
/* */
/* All rights reserved. */
/* */
/* Redistribution and use in source and binary forms, with or without */
/* modification, are permitted provided that the following condition is 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) SPI_MR_PCS((~(1 << npcs) & 0xF))
/** Calculates the value of the CSR SCBR field given the baudrate and MCK. */
#define SPI_SCBR(baudrate, masterClock) \
SPI_CSR_SCBR((uint32_t)(masterClock / baudrate))
/** Calculates the value of the CSR DLYBS field given the desired delay (in ns) */
#define SPI_DLYBS(delay, masterClock) \
SPI_CSR_DLYBS((uint32_t) (((masterClock / 1000000) * delay) / 1000)+1)
/** Calculates the value of the CSR DLYBCT field given the desired delay (in ns) */
#define SPI_DLYBCT(delay, masterClock) \
SPI_CSR_DLYBCT ((uint32_t) (((masterClock / 1000000) * delay) / 32000)+1)
/*------------------------------------------------------------------------------ */
#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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