2 * Copyright (c) 1988, 1993
3 * The Regents of the University of California. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. Neither the name of the University nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * @(#) Copyright (c) 1988, 1993 The Regents of the University of California. All rights reserved.
30 * @(#)morse.c 8.1 (Berkeley) 5/31/93
31 * $FreeBSD: src/games/morse/morse.c,v 1.12.2.2 2002/03/12 17:45:15 phantom Exp $
32 * $DragonFly: src/games/morse/morse.c,v 1.8 2008/05/30 21:47:04 corecode Exp $
36 * Taught to send *real* morse by Lyndon Nerenberg (VE7TCP/VE6BBM)
37 * <lyndon@orthanc.com>
41 #include <sys/soundcard.h>
61 static const struct morsetab mtab[] = {
110 {'!', "-.-.--"}, /* KW */
114 {'=', "-...-"}, /* BT */
117 {'(', "-.--."}, /* KN */
120 {'+', ".-.-."}, /* AR */
123 {'@', ".--.-."}, /* AC */
129 static const struct morsetab iso8859tab[] = {
144 static const struct morsetab koi8rtab[] = {
146 * the cyrillic alphabet; you'll need a KOI8R font in order
147 * to see the actual characters
150 {'Â', "-..."}, /* be */
151 {'×', ".--"}, /* ve */
152 {'Ç', "--."}, /* ge */
153 {'Ä', "-.."}, /* de */
155 {'£', "."}, /* yo, the same as ye */
156 {'Ö', "...-"}, /* she */
157 {'Ú', "--.."}, /* ze */
159 {'Ê', ".---"}, /* i kratkoye */
160 {'Ë', "-.-"}, /* ka */
161 {'Ì', ".-.."}, /* el */
162 {'Í', "--"}, /* em */
163 {'Î', "-."}, /* en */
164 {'Ï', "---"}, /* o */
165 {'Ð', ".--."}, /* pe */
166 {'Ò', ".-."}, /* er */
167 {'Ó', "..."}, /* es */
169 {'Õ', "..-"}, /* u */
170 {'Æ', "..-."}, /* ef */
171 {'È', "...."}, /* kha */
172 {'Ã', "-.-."}, /* ce */
173 {'Þ', "---."}, /* che */
174 {'Û', "----"}, /* sha */
175 {'Ý', "--.-"}, /* shcha */
176 {'Ù', "-.--"}, /* yi */
177 {'Ø', "-..-"}, /* myakhkij znak */
178 {'Ü', "..-.."}, /* ae */
179 {'À', "..--"}, /* yu */
180 {'Ñ', ".-.-"}, /* ya */
190 void alloc_soundbuf(struct tone_data *, double, int);
191 void morse(char, int);
192 void show(const char *, int);
193 void play(const char *, int);
194 void ttyout(const char *, int);
195 void sighandler(int);
197 #define GETOPTOPTS "d:ef:opP:sw:W:"
199 "usage: morse [-s] [-e] [-p | -o] [-P device] [-d device] [-w speed] [-W speed] [-f frequency] [string ...]\n"
201 static int oflag, pflag, sflag, eflag;
202 static int wpm = 20; /* words per minute */
203 static int farnsworth = -1;
204 #define FREQUENCY 600
205 static int freq = FREQUENCY;
206 static char *device; /* for tty-controlled generator */
208 static struct tone_data tone_dot, tone_dash, tone_silence, tone_letter_silence;
209 #define DSP_RATE 44100
210 static const char *snddev = NULL;
214 #define WORD_SPACE (7 - CHAR_SPACE)
215 static float dot_clock, word_clock;
217 struct termios otty, ntty;
220 static const struct morsetab *hightab;
223 main(int argc, char **argv)
229 while ((ch = getopt(argc, argv, GETOPTOPTS)) != -1)
236 setvbuf(stdout, 0, _IONBF, 0);
257 farnsworth = atoi(optarg);
261 fputs(USAGE, stderr);
264 if (pflag + !!device + sflag > 1) {
265 fputs("morse: only one of -o, -p, -d and -s allowed\n", stderr);
268 if ((pflag || device) && ((wpm < 1) || (wpm > 60) || (farnsworth > 60))) {
269 fputs("morse: insane speed\n", stderr);
272 if ((pflag || device) && (freq == 0))
274 if (pflag || device) {
276 * A note on how to get to this magic 1.2:
277 * x WPM = 50*x dits per minute (norm word "PARIS").
278 * dits per sec = dits per minute / 60, thus
279 * dits per sec = 50 * x / 60 = x / (60 / 50) = x / 1.2
281 dot_clock = wpm / 1.2; /* dots/sec */
282 dot_clock = 1 / dot_clock; /* duration of a dot */
284 word_clock = dot_clock;
287 * This is how to get to this formula:
288 * PARIS = 22 dit (symbols) + 9 symbol spaces = 31 symbol times
291 * The symbol times are in dot_clock, so the spaces have to
292 * make up to reach the farnsworth time.
295 word_clock = (60.0 / farnsworth - 31 * dot_clock) / 19;
297 if (snddev == NULL) {
300 else /* only pflag */
305 snd_chan_param param;
307 if (oflag && strcmp(snddev, "-") == 0)
308 spkr = STDOUT_FILENO;
310 spkr = open(snddev, O_WRONLY, 0);
312 err(1, "%s", snddev);
313 param.play_rate = DSP_RATE;
314 param.play_format = AFMT_S16_NE;
316 param.rec_format = 0;
317 if (!oflag && ioctl(spkr, AIOSFMT, ¶m) != 0)
318 err(1, "%s: set format", snddev);
319 alloc_soundbuf(&tone_dot, dot_clock, 1);
320 alloc_soundbuf(&tone_dash, DASH_LEN * dot_clock, 1);
321 alloc_soundbuf(&tone_silence, dot_clock, 0);
322 alloc_soundbuf(&tone_letter_silence, word_clock, 0);
325 if ((line = open(device, O_WRONLY | O_NONBLOCK)) == -1) {
326 perror("open tty line");
329 if (tcgetattr(line, &otty) == -1) {
330 perror("tcgetattr() failed");
334 ntty.c_cflag |= CLOCAL;
335 tcsetattr(line, TCSANOW, &ntty);
336 lflags = fcntl(line, F_GETFL);
337 lflags &= ~O_NONBLOCK;
338 fcntl(line, F_SETFL, &lflags);
339 ioctl(line, TIOCMGET, &lflags);
340 lflags &= ~TIOCM_RTS;
342 ioctl(line, TIOCMSET, &lflags);
343 (void)signal(SIGHUP, sighandler);
344 (void)signal(SIGINT, sighandler);
345 (void)signal(SIGQUIT, sighandler);
346 (void)signal(SIGTERM, sighandler);
352 if (setlocale(LC_CTYPE, "") != NULL &&
353 *(codeset = nl_langinfo(CODESET)) != '\0') {
354 if (strcmp(codeset, "KOI8-R") == 0)
356 else if (strcmp(codeset, "ISO8859-1") == 0 ||
357 strcmp(codeset, "ISO8859-15") == 0)
358 hightab = iso8859tab;
364 for (p = *argv; *p; ++p) {
367 if (*p == '<' || *p == '>') {
371 if (strchr("> \r\n", *(p + 1)) != NULL)
381 while ((ch = getchar()) != EOF) {
392 if (strchr("> \r\n", tch) != NULL)
401 tcsetattr(line, TCSANOW, &otty);
406 alloc_soundbuf(struct tone_data *tone, double len, int on)
410 samples = DSP_RATE * len;
411 tone->len = samples * sizeof(*tone->data);
412 tone->data = malloc(tone->len);
413 if (tone->data == NULL)
416 bzero(tone->data, tone->len);
421 * We create a sinus with the specified frequency and smooth
422 * the edges to reduce key clicks.
424 for (i = 0; i < samples; i++) {
427 #define FILTER_SAMPLES (DSP_RATE * 8 / 1000) /* 8 ms ramp time */
428 if (i < FILTER_SAMPLES || i > samples - FILTER_SAMPLES) {
431 if (i > FILTER_SAMPLES)
433 #if defined(TRIANGLE_FILTER)
437 filter = (double)fi / FILTER_SAMPLES;
438 #elif defined(GAUSS_FILTER)
443 pow((double)(FILTER_SAMPLES - fi) /
449 filter = (1 + cos(M_PI * (FILTER_SAMPLES - fi) / FILTER_SAMPLES)) / 2;
452 tone->data[i] = 32767 * sin((double)i / samples * len * freq * 2 * M_PI) *
458 morse(char c, int prosign)
460 const struct morsetab *m;
462 if (isalpha((unsigned char)c))
463 c = tolower((unsigned char)c);
464 if ((c == '\r') || (c == '\n'))
478 for (m = ((unsigned char)c < 0x80? mtab: hightab);
479 m != NULL && m->inchar != '\0';
481 if (m->inchar == c) {
483 play(m->morse, prosign);
485 ttyout(m->morse, prosign);
487 show(m->morse, prosign);
493 show(const char *s, int prosign)
499 printf(" %s", *s == '.' ? "dit" : "dah");
505 play(const char *s, int prosign)
509 struct tone_data *tone;
512 * We don't need to usleep() here, as the sound device blocks.
514 for (c = s; *c != '\0'; c++) {
525 duration = WORD_SPACE;
526 tone = &tone_letter_silence;
529 errx(1, "invalid morse digit");
531 while (duration-- > 0)
532 write(spkr, tone->data, tone->len);
533 /* Only space within a symbol */
534 if (c[1] != '\0' || prosign)
535 write(spkr, tone_silence.data, tone_silence.len);
539 duration = CHAR_SPACE;
540 while (duration-- > 0)
541 write(spkr, tone_letter_silence.data, tone_letter_silence.len);
543 /* Sync out the audio data with other output */
545 ioctl(spkr, SNDCTL_DSP_SYNC, NULL);
549 ttyout(const char *s, int prosign)
552 int duration, on, lflags;
554 for (c = s; *c != '\0'; c++) {
558 duration = dot_clock;
562 duration = dot_clock * DASH_LEN;
566 duration = word_clock * WORD_SPACE;
573 ioctl(line, TIOCMGET, &lflags);
575 ioctl(line, TIOCMSET, &lflags);
580 ioctl(line, TIOCMGET, &lflags);
581 lflags &= ~TIOCM_RTS;
582 ioctl(line, TIOCMSET, &lflags);
583 duration = dot_clock * 1000000;
584 /* Only space within a symbol */
585 if (c[1] != '\0' || prosign)
589 duration = word_clock * CHAR_SPACE * 1000000;
595 sighandler(int signo)
598 ioctl(line, TIOCMSET, &olflags);
599 tcsetattr(line, TCSANOW, &otty);
601 signal(signo, SIG_DFL);
602 (void)kill(getpid(), signo);