/* ---------------------------------------------------------------------------- | |
* SAM Software Package License | |
* ---------------------------------------------------------------------------- | |
* Copyright (c) 2011, 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) 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_ */ | |