92 lines
3.0 KiB
C
92 lines
3.0 KiB
C
/*
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* SpanDSP - a series of DSP components for telephony
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*
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* private/async.h - Asynchronous serial bit stream encoding and decoding
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*
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* Written by Steve Underwood <steveu@coppice.org>
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*
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* Copyright (C) 2003 Steve Underwood
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*
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* All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License version 2.1,
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* as published by the Free Software Foundation.
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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 Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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* $Id: async.h,v 1.1 2008/11/30 10:17:31 steveu Exp $
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*/
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#if !defined(_SPANDSP_PRIVATE_ASYNC_H_)
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#define _SPANDSP_PRIVATE_ASYNC_H_
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/*!
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Asynchronous data transmit descriptor. This defines the state of a single
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working instance of a byte to asynchronous serial converter, for use
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in FSK modems.
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*/
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struct async_tx_state_s
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{
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/*! \brief The number of data bits per character. */
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int data_bits;
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/*! \brief The type of parity. */
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int parity;
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/*! \brief The number of stop bits per character. */
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int stop_bits;
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/*! \brief A pointer to the callback routine used to get characters to be transmitted. */
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get_byte_func_t get_byte;
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/*! \brief An opaque pointer passed when calling get_byte. */
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void *user_data;
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/*! \brief A current, partially transmitted, character. */
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int byte_in_progress;
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/*! \brief The current bit position within a partially transmitted character. */
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int bitpos;
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/*! \brief Parity bit. */
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int parity_bit;
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};
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/*!
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Asynchronous data receive descriptor. This defines the state of a single
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working instance of an asynchronous serial to byte converter, for use
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in FSK modems.
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*/
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struct async_rx_state_s
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{
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/*! \brief The number of data bits per character. */
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int data_bits;
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/*! \brief The type of parity. */
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int parity;
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/*! \brief The number of stop bits per character. */
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int stop_bits;
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/*! \brief TRUE if V.14 rate adaption processing should be performed. */
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int use_v14;
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/*! \brief A pointer to the callback routine used to handle received characters. */
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put_byte_func_t put_byte;
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/*! \brief An opaque pointer passed when calling put_byte. */
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void *user_data;
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/*! \brief A current, partially complete, character. */
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int byte_in_progress;
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/*! \brief The current bit position within a partially complete character. */
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int bitpos;
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/*! \brief Parity bit. */
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int parity_bit;
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/*! A count of the number of parity errors seen. */
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int parity_errors;
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/*! A count of the number of character framing errors seen. */
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int framing_errors;
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};
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#endif
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/*- End of file ------------------------------------------------------------*/
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