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52 lines
1.7 KiB
C
52 lines
1.7 KiB
C
/*
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* geany_encoding=koi8-r
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* morse.h
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*
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* Copyright 2017 Edward V. Emelianov <eddy@sao.ru, edward.emelianoff@gmail.com>
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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 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 Street, Fifth Floor, Boston,
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* MA 02110-1301, USA.
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*
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*/
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#pragma once
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#ifndef __MORSE_H__
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#define __MORSE_H__
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#include <stdint.h>
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/*
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International Morse code is composed of five elements:
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short mark, dot or "dit" (Œ): "dot duration" is one time unit long == 50ms
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longer mark, dash or "dah" (ŒŒŒ): three time units long == 150ms
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inter-element gap between the dots and dashes within a character: one dot duration or one unit long == 50ms
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short gap (between letters): three time units long == 150ms
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medium gap (between words): seven time units long == 350ms
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*/
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// base timing (in ms)
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#define DOT_LEN (75)
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#define DASH_LEN (3*DOT_LEN)
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#define SHRT_GAP (DOT_LEN)
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// minus shr gap
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#define LTR_GAP (2*DOT_LEN)
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// minus ltr gap
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#define WRD_GAP (4*DOT_LEN)
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extern uint16_t mbuff[];
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char *fillbuffer(char *ltr, uint8_t *len);
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#endif // __MORSE_H__
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