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96 lines
3.1 KiB
C++
96 lines
3.1 KiB
C++
/* rs232adapter.hpp: route byte xmt/rcv interface to stream and RS232
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Copyright (c) 2019, Joerg Hoppe
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j_hoppe@t-online.de, www.retrocmp.com
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Permission is hereby granted, free of charge, to any person obtaining a
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copy of this software and associated documentation files (the "Software"),
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to deal in the Software without restriction, including without limitation
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the rights to use, copy, modify, merge, publish, distribute, sublicense,
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and/or sell copies of the Software, and to permit persons to whom the
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Software is furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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JOERG HOPPE BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
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IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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8-aug-2019 JH edit start
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*/
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#ifndef _RS232ADAPTER_HPP_
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#define _RS232ADAPTER_HPP_
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#include <ostream>
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#include <istream>
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#include <sstream>
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#include <deque>
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#include "utils.hpp"
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#include "logsource.hpp"
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#include "rs232.hpp"
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// a character with additional transmission status
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typedef struct {
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uint8_t c; // 5/6/7/8 bit character
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// framing and parity errors combined
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bool format_error;
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} rs232byte_t;
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class rs232adapter_c: public logsource_c {
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private:
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// for loopback and to decode 0xff to 0xff,0xff
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std::deque<rs232byte_t> rcvbuffer;
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// std::stringstream rcv_decoder;
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// last sequence of xmt data for pattern matching
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static const int pattern_max_len = 256;
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char pattern[pattern_max_len + 1]; // if != "", this is search for
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char pattern_stream_data[pattern_max_len + 1];
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// deliver rcv chars delayed by this "baudrate"
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timeout_c rcv_baudrate_delay;
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public:
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rs232adapter_c();
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pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;
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unsigned baudrate; // deliver rcv chars throttled by this "baudrate"
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// if true, an inject 0xff is delivered as 0xff,0xff.
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// this is compatible with termios(3) encoding of error flags
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// If IGNPAR=0, PARMRK=1: error on <char> received as \377 \0 <char>
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// \377 received as \377 \377
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bool rcv_termios_error_encoding;
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/*** RS232 interface ***/
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rs232_c *rs232; // if assigned, routing to initialized RS232 port
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/*** BYTE interface ***/
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bool rs232byte_rcv_poll(rs232byte_t *rcvbyte);
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void rs232byte_xmt_send(rs232byte_t xmtbyte);
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void rs232byte_loopback(rs232byte_t xmtbyte);
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/*** STREAM interface ***/
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std::istream *stream_rcv; // users sets this to a stream which producess chars
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// may be a stringstream to inject characters
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std::ostream *stream_xmt; // users sets this to a stream in which
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// chars are written to be transferred.
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// may be "cout", or an stringstream
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/*** PATTERN detection ***/
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void set_pattern(char *pattern);
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bool pattern_found; // switches true on match, user must clear
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};
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#endif // _RS232ADAPTER_HPP_
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