| /* ---------------------------------------------------------------------------- | |
| * 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_ */ | |