77 lines
2.4 KiB
C
77 lines
2.4 KiB
C
/**
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* \file
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* <!--
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* This file is part of BeRTOS.
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*
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* Bertos is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*
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* As a special exception, you may use this file as part of a free software
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* library without restriction. Specifically, if other files instantiate
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* templates or use macros or inline functions from this file, or you compile
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* this file and link it with other files to produce an executable, this
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* file does not by itself cause the resulting executable to be covered by
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* the GNU General Public License. This exception does not however
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* invalidate any other reasons why the executable file might be covered by
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* the GNU General Public License.
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*
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* Copyright 2003, 2004, 2006 Develer S.r.l. (http://www.develer.com/)
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* Copyright 2000 Bernie Innocenti <bernie@codewiz.org>
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*
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* -->
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*
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* \brief Emulated SPI driver.
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*
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*
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* \author Francesco Sacchi <batt@develer.com>
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* \author Daniele Basile <asterix@develer.com>
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*
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* $WIZ$ module_name = "spi_bitbang"
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* $WIZ$ module_configuration = "bertos/cfg/cfg_spi_bitbang.h"
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* $WIZ$ module_hw = "bertos/hw/hw_spi.h"
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*/
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#ifndef DRV_SPI_BITBANG_H
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#define DRV_SPI_BITBANG_H
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#include "cfg/cfg_spi_bitbang.h"
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#include <cfg/compiler.h>
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/**
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* Define send and receive order bit.
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*
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* $WIZ$ ordet_bit_list = "SPI_LSB_FIRST", "SPI_MSB_FIRST"
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*/
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#define SPI_LSB_FIRST 1
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#define SPI_MSB_FIRST 2
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#if CONFIG_SPI_DATAORDER == SPI_LSB_FIRST
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#define SPI_DATAORDER_START 1
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#define SPI_DATAORDER_SHIFT(i) ((i) <<= 1)
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#elif CONFIG_SPI_DATAORDER == SPI_MSB_FIRST
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#define SPI_DATAORDER_START 0x80
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#define SPI_DATAORDER_SHIFT(i) ((i) >>= 1)
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#endif
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void spi_write(const void *buf, size_t len);
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void spi_read(void *buf, size_t len);
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uint8_t spi_sendRecv(uint8_t c);
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void spi_init(void);
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void spi_assertSS(void);
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void spi_deassertSS(void);
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#endif /* DRV_SPI_BITBANG_H */
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