107 lines
3.1 KiB
C
107 lines
3.1 KiB
C
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/*
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Copyright 2006, Freie Universitaet Berlin. All rights reserved.
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These sources were developed at the Freie Universität 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, 2006
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*/
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/**
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* @defgroup libsdspi Serial Peripheral Interface
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* @ingroup libsd
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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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* @date 2006
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* @version 1.0
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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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void spi_init(void);
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/// Configure UART1 for SPI mode
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void spi_enable(void);
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/// Receive one byte from SPI
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uint8_t spi_rx(void);
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/// Send one byte to SPI
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void spi_tx(const uint8_t c);
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/// Read a number of bytes from SPI
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void spi_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 spi_dma_lock;
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#endif
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#if SPI_DMA_READ || SPI_DMA_WRITE
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void spi_dma_wait();
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#endif
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#if SPI_WRITE
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/// Write a number of bytes to SPI
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void spi_write(const void *pSource,
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const uint16_t size,
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const uint8_t startToken, const bool incSource);
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#endif
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/// Wait a number of clock cycles
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void spi_idle(const uint16_t clocks);
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/// Read chars until token is received
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bool spi_wait_token(const uint8_t token, const uint16_t timeout);
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#endif /*SPI_H_ */
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