119 lines
2.9 KiB
C
119 lines
2.9 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 2009 Develer S.r.l. (http://www.develer.com/)
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*
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* -->
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*
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* \brief Generic Serial-in, Parallel-out implementation (SIPO).
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*
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*
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*
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* \author Andrea Grandi <andrea@develer.com>
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* \author Daniele Basile <asterix@develer.com>
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*
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* $WIZ$ module_name = "sipo"
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* $WIZ$ module_depends = "kfile"
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* $WIZ$ module_hw = "bertos/hw/hw_sipo.h"
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*/
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#ifndef DRV_SIPO_H
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#define DRV_SIPO_H
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#include "hw/hw_sipo.h"
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#include <io/kfile.h>
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#define SIPO_DATAORDER_START_LSB 1
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#define SIPO_DATAORDER_START_MSB 0x80
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/**
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* Define enum to set sipo data order.
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*/
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typedef enum SipoBitOrder
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{
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SIPO_DATAORDER_MSB = 0,
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SIPO_DATAORDER_LSB = 1
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} SipoBitOrder;
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/**
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* Define enum to set the start level of clock.
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*/
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typedef enum SipoClockPol
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{
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SIPO_START_LOW = 0,
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SIPO_START_HIGH = 1
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} SipoClkPol;
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/**
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* Define enum to set load signal level.
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*/
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typedef enum SipoLoadPol
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{
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SIPO_LOW_TO_HIGH = 0,
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SIPO_HIGH_TO_LOW = 1
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} SipoLoadPol;
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/**
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* Sipo KFile context structure.
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*/
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typedef struct Sipo
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{
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KFile fd; ///< File descriptor.
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SipoMap load_device; ///< Descriptor of the device that we want drive.
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SipoLoadPol load_pol; ///< Set polarity of load signal.
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SipoClkPol clock_pol; ///< Set polarity of data clock.
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SipoBitOrder bit_order; ///< Set the order of pushed bits in sipo.
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} Sipo;
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/**
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* ID for sipo.
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*/
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#define KFT_SIPO MAKE_ID('S', 'I', 'P', 'O')
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/**
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* Convert + ASSERT from generic KFile to Sipo.
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*/
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INLINE Sipo * SIPO_CAST(KFile *fd)
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{
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ASSERT(fd->_type == KFT_SIPO);
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return (Sipo *)fd;
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}
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void sipo_init(Sipo *fd);
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#endif // DRV_SIPO_H
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