144 lines
4 KiB
C
144 lines
4 KiB
C
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/*
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Copyright 2007, Freie Universitaet Berlin. All rights reserved.
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These sources were developed at the Freie Universit<EFBFBD>t Berlin, Computer
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Systems and Telematics group.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are
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met:
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- Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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- Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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- Neither the name of Freie Universitaet Berlin (FUB) nor the names of its
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contributors may be used to endorse or promote products derived from
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this software without specific prior written permission.
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This software is provided by FUB and the contributors on an "as is"
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basis, without any representations or warranties of any kind, express
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or implied including, but not limited to, representations or
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warranties of non-infringement, merchantability or fitness for a
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particular purpose. In no event shall FUB or contributors be liable
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for any direct, indirect, incidental, special, exemplary, or
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consequential damages (including, but not limited to, procurement of
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substitute goods or services; loss of use, data, or profits; or
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business interruption) however caused and on any theory of liability,
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whether in contract, strict liability, or tort (including negligence
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or otherwise) arising in any way out of the use of this software, even
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if advised of the possibility of such damage.
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This implementation was developed by the CST group at the FUB.
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For documentation and questions please use the web site
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http://scatterweb.mi.fu-berlin.de and the mailinglist
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scatterweb@lists.spline.inf.fu-berlin.de (subscription via the Website).
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Berlin, 2007
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*/
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/**
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* @addtogroup uart1
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* @ingroup libsd_spi
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* @{
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*/
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/**
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* @file ScatterWeb.Spi.h
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* @ingroup libsdspi
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* @brief Serial Peripheral Interface
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*
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* @author Michael Baar <baar@inf.fu-berlin.de>
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* @version $Revision: 1.1 $
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*
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* $Id: sdspi.h,v 1.1 2008/03/28 15:58:44 nvt-se Exp $
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*/
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#ifndef __SPI_H__
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#define __SPI_H__
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#ifndef SPI_DMA_READ
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#define SPI_DMA_READ 0
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#endif
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#ifndef SPI_DMA_WRITE
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#define SPI_DMA_WRITE 0
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#endif
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#ifndef SPI_WRITE
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#define SPI_WRITE 1
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#endif
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/**
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* @brief Init SPI driver
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*/
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void sdspi_init(void);
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/// chipselect
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__inline void sdspi_select();
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__inline void sdspi_unselect();
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/**
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* @brief Receive one byte from SPI
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*/
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uint8_t sdspi_rx(void);
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/**
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* @brief Send one byte to SPI
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*
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* @param[in] c Byte to send
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*/
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void sdspi_tx(const uint8_t c);
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/**
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* @brief Read a number of bytes from SPI
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*
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* @param[in] pDestination Pointer to buffer to store bytestream
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* @param[in] size Number of bytes to store in pDestination
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* @param[in] incDest Increment destination pointer after each byte by one (or not)
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*/
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void sdspi_read(void *pDestination, const uint16_t size, const bool incDest);
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#if SPI_DMA_WRITE
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extern uint8_t sdspi_dma_lock;
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#endif
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#if SPI_DMA_READ || SPI_DMA_WRITE
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void sdspi_dma_wait(void);
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#endif
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#if SPI_WRITE
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/**
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* @brief Write a number of bytes to SPI
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*
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* @param[in] pSource Pointer to buffer with data to send
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* @param[in] size Number of bytes to send
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* @param[in] startToken First byte to send before starting to send size bytes from pSource
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* @param[in] incSource Increment source pointer after each byte by one (or not)
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*/
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void sdspi_write(const void *pSource,
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const uint16_t size, const int increment);
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#endif
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/**
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* @brief Wait a number of clock cycles
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*
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* @param[in] clocks Wait clocks x 8 cycles
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*/
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void sdspi_idle(const uint16_t clocks);
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/**
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* @brief Read bytes from SPI until token is received
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*
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* @param[in] token Token to wait for
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* @param[in] timeout Maximum number of bytes to read
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* @return true if token received, false otherwise
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*/
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uint16_t sdspi_wait_token(const uint8_t feed, const uint8_t mask,
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const uint8_t token, const uint16_t timeout);
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#endif /*__SPI_H__*/
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/** @} */
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