-
Notifications
You must be signed in to change notification settings - Fork 314
/
Copy pathptt.c
1048 lines (834 loc) · 28.5 KB
/
ptt.c
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
//
// This file is part of Dire Wolf, an amateur radio packet TNC.
//
// Copyright (C) 2011, 2013, 2014, 2015 John Langner, WB2OSZ
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 2 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
/*------------------------------------------------------------------
*
* Module: ptt.c
*
* Purpose: Activate the output control lines for push to talk (PTT) and other purposes.
*
* Description: Traditionally this is done with the RTS signal of the serial port.
*
* If we have two radio channels and only one serial port, DTR
* can be used for the second channel.
*
* If __WIN32__ is defined, we use the Windows interface.
* Otherwise we use the Linux interface.
*
* Version 0.9: Add ability to use GPIO pins on Linux.
*
* Version 1.1: Add parallel printer port for x86 Linux only.
*
* Version 1.2: More than two radio channels.
* Generalize for additional signals besides PTT.
*
* References: http://www.robbayer.com/files/serial-win.pdf
*
* https://www.kernel.org/doc/Documentation/gpio.txt
*
*---------------------------------------------------------------*/
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <assert.h>
#include <string.h>
#include <sys/time.h>
#if __WIN32__
#include <windows.h>
#else
#include <sys/termios.h>
#include <sys/ioctl.h>
#include <fcntl.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <errno.h>
/* So we can have more common code for fd. */
typedef int HANDLE;
#define INVALID_HANDLE_VALUE (-1)
#endif
#include "direwolf.h"
#include "textcolor.h"
#include "audio.h"
#include "ptt.h"
#if __WIN32__
#define RTS_ON(fd) EscapeCommFunction(fd,SETRTS);
#define RTS_OFF(fd) EscapeCommFunction(fd,CLRRTS);
#define DTR_ON(fd) EscapeCommFunction(fd,SETDTR);
#define DTR_OFF(fd) EscapeCommFunction(fd,CLRDTR);
#else
#define RTS_ON(fd) { int stuff; ioctl (fd, TIOCMGET, &stuff); stuff |= TIOCM_RTS; ioctl (fd, TIOCMSET, &stuff); }
#define RTS_OFF(fd) { int stuff; ioctl (fd, TIOCMGET, &stuff); stuff &= ~TIOCM_RTS; ioctl (fd, TIOCMSET, &stuff); }
#define DTR_ON(fd) { int stuff; ioctl (fd, TIOCMGET, &stuff); stuff |= TIOCM_DTR; ioctl (fd, TIOCMSET, &stuff); }
#define DTR_OFF(fd) { int stuff; ioctl (fd, TIOCMGET, &stuff); stuff &= ~TIOCM_DTR; ioctl (fd, TIOCMSET, &stuff); }
#define LPT_IO_ADDR 0x378
#endif
#if TEST
#define dw_printf printf
#endif
static int ptt_debug_level = 0;
void ptt_set_debug(int debug)
{
ptt_debug_level = debug;
}
/*-------------------------------------------------------------------
*
* Name: ptt_init
*
* Purpose: Open serial port(s) used for PTT signals and set to proper state.
*
* Inputs: audio_config_p - Structure with communication parameters.
*
* for each channel we have:
*
* ptt_method Method for PTT signal.
* PTT_METHOD_NONE - not configured. Could be using VOX.
* PTT_METHOD_SERIAL - serial (com) port.
* PTT_METHOD_GPIO - general purpose I/O.
* PTT_METHOD_LPT - Parallel printer port.
* PTT_METHOD_HAMLIB - HAMLib rig control.
*
* ptt_device Name of serial port device.
* e.g. COM1 or /dev/ttyS0.
*
* ptt_line RTS or DTR when using serial port.
*
* ptt_gpio GPIO number. Only used for Linux.
* Valid only when ptt_method is PTT_METHOD_GPIO.
*
* ptt_lpt_bit Bit number for parallel printer port.
* Bit 0 = pin 2, ..., bit 7 = pin 9.
* Valid only when ptt_method is PTT_METHOD_LPT.
*
* ptt_invert Invert the signal.
* Normally higher voltage means transmit or LED on.
*
* Outputs: Remember required information for future use.
*
* Description:
*
*--------------------------------------------------------------------*/
static struct audio_s *save_audio_config_p; /* Save config information for later use. */
static HANDLE ptt_fd[MAX_CHANS][NUM_OCTYPES];
/* Serial port handle or fd. */
/* Could be the same for two channels */
/* if using both RTS and DTR. */
static char otnames[NUM_OCTYPES][8];
void ptt_init (struct audio_s *audio_config_p)
{
int ch;
HANDLE fd;
#if __WIN32__
#else
int using_gpio;
#endif
#if DEBUG
text_color_set(DW_COLOR_DEBUG);
dw_printf ("ptt_init ( ... )\n");
#endif
save_audio_config_p = audio_config_p;
strcpy (otnames[OCTYPE_PTT], "PTT");
strcpy (otnames[OCTYPE_DCD], "DCD");
strcpy (otnames[OCTYPE_RIG], "RIG");
strcpy (otnames[OCTYPE_FUTURE], "FUTURE");
for (ch = 0; ch < MAX_CHANS; ch++) {
int ot;
for (ot = 0; ot < NUM_OCTYPES; ot++) {
ptt_fd[ch][ot] = INVALID_HANDLE_VALUE;
if (ptt_debug_level >= 2) {
text_color_set(DW_COLOR_DEBUG);
dw_printf ("ch=%d, %s method=%d, device=%s, line=%d, gpio=%d, lpt_bit=%d, invert=%d\n",
ch,
otnames[ot],
audio_config_p->achan[ch].octrl[ot].ptt_method,
audio_config_p->achan[ch].octrl[ot].ptt_device,
audio_config_p->achan[ch].octrl[ot].ptt_line,
audio_config_p->achan[ch].octrl[ot].ptt_gpio,
audio_config_p->achan[ch].octrl[ot].ptt_lpt_bit,
audio_config_p->achan[ch].octrl[ot].ptt_invert);
}
}
}
/*
* Set up serial ports.
*/
for (ch = 0; ch < MAX_CHANS; ch++) {
if (audio_config_p->achan[ch].valid) {
int ot;
for (ot = 0; ot < NUM_OCTYPES; ot++) {
if (audio_config_p->achan[ch].octrl[ot].ptt_method == PTT_METHOD_SERIAL) {
#if __WIN32__
#else
/* Translate Windows device name into Linux name. */
/* COM1 -> /dev/ttyS0, etc. */
if (strncasecmp(audio_config_p->achan[ch].octrl[ot].ptt_device, "COM", 3) == 0) {
int n = atoi (audio_config_p->achan[ch].octrl[ot].ptt_device + 3);
text_color_set(DW_COLOR_INFO);
dw_printf ("Converted %s device '%s'", audio_config_p->achan[ch].octrl[ot].ptt_device, otnames[ot]);
if (n < 1) n = 1;
sprintf (audio_config_p->achan[ch].octrl[ot].ptt_device, "/dev/ttyS%d", n-1);
dw_printf (" to Linux equivalent '%s'\n", audio_config_p->achan[ch].octrl[ot].ptt_device);
}
#endif
/* Can't open the same device more than once so we */
/* need more logic to look for the case of multiple radio */
/* channels using different pins of the same COM port. */
/* Did some earlier channel use the same device name? */
int same_device_used = 0;
int j, k;
for (j = ch; j >= 0; j--) {
if (audio_config_p->achan[j].valid) {
for (k = ((j==ch) ? (ot - 1) : (NUM_OCTYPES-1)); k >= 0; k--) {
if (strcmp(audio_config_p->achan[ch].octrl[ot].ptt_device,audio_config_p->achan[j].octrl[k].ptt_device) == 0) {
fd = ptt_fd[j][k];
same_device_used = 1;
}
}
}
}
if ( ! same_device_used) {
#if __WIN32__
char bettername[50];
// Bug fix in release 1.1 - Need to munge name for COM10 and up.
// http://support.microsoft.com/kb/115831
strcpy (bettername, audio_config_p->achan[ch].octrl[ot].ptt_device);
if (strncasecmp(bettername, "COM", 3) == 0) {
int n;
n = atoi(bettername+3);
if (n >= 10) {
strcpy (bettername, "\\\\.\\");
strcat (bettername, audio_config_p->achan[ch].octrl[ot].ptt_device);
}
}
fd = CreateFile(bettername,
GENERIC_READ, 0, 0, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, 0);
#else
/* O_NONBLOCK added in version 0.9. */
/* Was hanging with some USB-serial adapters. */
/* https://bugs.launchpad.net/ubuntu/+source/linux/+bug/661321/comments/12 */
fd = open (audio_config_p->achan[ch].octrl[ot].ptt_device, O_RDONLY | O_NONBLOCK);
#endif
}
if (fd != INVALID_HANDLE_VALUE) {
ptt_fd[ch][ot] = fd;
}
else {
#if __WIN32__
#else
int e = errno;
#endif
text_color_set(DW_COLOR_ERROR);
dw_printf ("ERROR can't open device %s for channel %d PTT control.\n",
audio_config_p->achan[ch].octrl[ot].ptt_device, ch);
#if __WIN32__
#else
dw_printf ("%s\n", strerror(errno));
#endif
/* Don't try using it later if device open failed. */
audio_config_p->achan[ch].octrl[ot].ptt_method = PTT_METHOD_NONE;
}
/*
* Set initial state off.
* ptt_set will invert output signal if appropriate.
*/
ptt_set (ot, ch, 0);
} /* if serial method. */
} /* for each output type. */
} /* if channel valid. */
} /* For each channel. */
/*
* Set up GPIO - for Linux only.
*/
#if __WIN32__
#else
/*
* Does any of them use GPIO or HAMLIB?
*/
using_gpio = 0;
for (ch=0; ch<MAX_CHANS; ch++) {
if (save_audio_config_p->achan[ch].valid) {
int ot;
for (ot = 0; ot < NUM_OCTYPES; ot++) {
if (audio_config_p->achan[ch].octrl[ot].ptt_method == PTT_METHOD_GPIO) {
using_gpio = 1;
}
}
}
}
if (using_gpio) {
struct stat finfo;
/*
* Normally the device nodes are set up for access
* only by root. Try to change it here so we don't
* burden user with another configuration step.
*
* Does /sys/class/gpio/export even exist?
*/
if (stat("/sys/class/gpio/export", &finfo) < 0) {
text_color_set(DW_COLOR_ERROR);
dw_printf ("This system is not configured with the GPIO user interface.\n");
dw_printf ("Use a different method for PTT control.\n");
exit (1);
}
/*
* Do we have permission to access it?
*
* pi@raspberrypi /sys/class/gpio $ ls -l
* total 0
* --w------- 1 root root 4096 Aug 20 07:59 export
* lrwxrwxrwx 1 root root 0 Aug 20 07:59 gpiochip0 -> ../../devices/virtual/gpio/gpiochip0
* --w------- 1 root root 4096 Aug 20 07:59 unexport
*/
if (geteuid() != 0) {
if ( ! (finfo.st_mode & S_IWOTH)) {
int err;
/* Try to change protection. */
err = system ("sudo chmod go+w /sys/class/gpio/export /sys/class/gpio/unexport");
if (stat("/sys/class/gpio/export", &finfo) < 0) {
/* Unexpected because we could do it before. */
text_color_set(DW_COLOR_ERROR);
dw_printf ("This system is not configured with the GPIO user interface.\n");
dw_printf ("Use a different method for PTT control.\n");
exit (1);
}
/* Did we succeed in changing the protection? */
if ( ! (finfo.st_mode & S_IWOTH)) {
text_color_set(DW_COLOR_ERROR);
dw_printf ("Permissions do not allow ordinary users to access GPIO.\n");
dw_printf ("Log in as root and type this command:\n");
dw_printf (" chmod go+w /sys/class/gpio/export /sys/class/gpio/unexport\n");
exit (1);
}
}
}
}
/*
* We should now be able to create the device nodes for
* the pins we want to use.
*/
for (ch = 0; ch < MAX_CHANS; ch++) {
if (save_audio_config_p->achan[ch].valid) {
int ot;
for (ot = 0; ot < NUM_OCTYPES; ot++) {
if (audio_config_p->achan[ch].octrl[ot].ptt_method == PTT_METHOD_GPIO) {
char stemp[80];
struct stat finfo;
int err;
fd = open("/sys/class/gpio/export", O_WRONLY);
if (fd < 0) {
text_color_set(DW_COLOR_ERROR);
dw_printf ("Permissions do not allow ordinary users to access GPIO.\n");
dw_printf ("Log in as root and type this command:\n");
dw_printf (" chmod go+w /sys/class/gpio/export /sys/class/gpio/unexport\n");
exit (1);
}
sprintf (stemp, "%d", audio_config_p->achan[ch].octrl[ot].ptt_gpio);
if (write (fd, stemp, strlen(stemp)) != strlen(stemp)) {
int e = errno;
/* Ignore EBUSY error which seems to mean */
/* the device node already exists. */
if (e != EBUSY) {
text_color_set(DW_COLOR_ERROR);
dw_printf ("Error writing \"%s\" to /sys/class/gpio/export, errno=%d\n", stemp, e);
dw_printf ("%s\n", strerror(e));
exit (1);
}
}
close (fd);
/*
* We will have the same permission problem if not root.
* We only care about "direction" and "value".
*/
sprintf (stemp, "sudo chmod go+rw /sys/class/gpio/gpio%d/direction", audio_config_p->achan[ch].octrl[ot].ptt_gpio);
err = system (stemp);
sprintf (stemp, "sudo chmod go+rw /sys/class/gpio/gpio%d/value", audio_config_p->achan[ch].octrl[ot].ptt_gpio);
err = system (stemp);
sprintf (stemp, "/sys/class/gpio/gpio%d/value", audio_config_p->achan[ch].octrl[ot].ptt_gpio);
if (stat(stemp, &finfo) < 0) {
int e = errno;
text_color_set(DW_COLOR_ERROR);
dw_printf ("Failed to get status for %s \n", stemp);
dw_printf ("%s\n", strerror(e));
exit (1);
}
if (geteuid() != 0) {
if ( ! (finfo.st_mode & S_IWOTH)) {
text_color_set(DW_COLOR_ERROR);
dw_printf ("Permissions do not allow ordinary users to access GPIO.\n");
dw_printf ("Log in as root and type these commands:\n");
dw_printf (" chmod go+rw /sys/class/gpio/gpio%d/direction", audio_config_p->achan[ch].octrl[ot].ptt_gpio);
dw_printf (" chmod go+rw /sys/class/gpio/gpio%d/value", audio_config_p->achan[ch].octrl[ot].ptt_gpio);
exit (1);
}
}
/*
* Set output direction with initial state off.
*/
sprintf (stemp, "/sys/class/gpio/gpio%d/direction", audio_config_p->achan[ch].octrl[ot].ptt_gpio);
fd = open(stemp, O_WRONLY);
if (fd < 0) {
int e = errno;
text_color_set(DW_COLOR_ERROR);
dw_printf ("Error opening %s\n", stemp);
dw_printf ("%s\n", strerror(e));
exit (1);
}
char hilo[8];
if (audio_config_p->achan[ch].octrl[ot].ptt_invert) {
strcpy (hilo, "high");
}
else {
strcpy (hilo, "low");
}
if (write (fd, hilo, strlen(hilo)) != strlen(hilo)) {
int e = errno;
text_color_set(DW_COLOR_ERROR);
dw_printf ("Error writing initial state to %s\n", stemp);
dw_printf ("%s\n", strerror(e));
exit (1);
}
close (fd);
}
}
}
}
#endif
/*
* Set up parallel printer port.
*
* Restrictions:
* Only the primary printer port.
* For x86 Linux only.
*/
#if ( defined(__i386__) || defined(__x86_64__) ) && ( defined(__linux__) || defined(__unix__) )
for (ch = 0; ch < MAX_CHANS; ch++) {
if (save_audio_config_p->achan[ch].valid) {
int ot;
for (ot = 0; ot < NUM_OCTYPES; ot++) {
if (audio_config_p->achan[ch].octrl[ot].ptt_method == PTT_METHOD_LPT) {
/* Can't open the same device more than once so we */
/* need more logic to look for the case of mutiple radio */
/* channels using different pins of the LPT port. */
/* Did some earlier channel use the same ptt device name? */
int same_device_used = 0;
int j, k;
for (j = ch; j >= 0; j--) {
if (audio_config_p->achan[j].valid) {
for (k = ((j==ch) ? (ot - 1) : (NUM_OCTYPES-1)); k >= 0; k--) {
if (strcmp(audio_config_p->achan[ch].octrl[ot].ptt_device,audio_config_p->achan[j].octrl[k].ptt_device) == 0) {
fd = ptt_fd[j][k];
same_device_used = 1;
}
}
}
}
if ( ! same_device_used) {
fd = open ("/dev/port", O_RDWR | O_NDELAY);
}
if (fd != INVALID_HANDLE_VALUE) {
ptt_fd[ch][ot] = fd;
}
else {
int e = errno;
text_color_set(DW_COLOR_ERROR);
dw_printf ("ERROR - Can't open /dev/port for parallel printer port PTT control.\n");
dw_printf ("%s\n", strerror(errno));
dw_printf ("You probably don't have adequate permissions to access I/O ports.\n");
dw_printf ("Either run direwolf as root or change these permissions:\n");
dw_printf (" sudo chmod go+rw /dev/port\n");
dw_printf (" sudo setcap cap_sys_rawio=ep `which direwolf`\n");
/* Don't try using it later if device open failed. */
audio_config_p->achan[ch].octrl[ot].ptt_method = PTT_METHOD_NONE;
}
/*
* Set initial state off.
* ptt_set will invert output signal if appropriate.
*/
ptt_set (ot, ch, 0);
} /* if parallel printer port method. */
} /* for each output type */
} /* if valid channel. */
} /* For each channel. */
#endif /* x86 Linux */
#ifdef USE_HAMLIB
for (ch = 0; ch < MAX_CHANS; ch++) {
if (save_audio_config_p->achan[ch].valid) {
int ot, retcode;
RIG *rig;
freq_t freq;
for (ot = 0; ot < NUM_OCTYPES; ot++) {
if (audio_config_p->achan[ch].octrl[ot].ptt_method == PTT_METHOD_HAMLIB) {
if (audio_config_p->achan[ch].octrl[ot].ptt_rig - 1 >= audio_config_p->rigs) {
text_color_set(DW_COLOR_ERROR);
dw_printf ("Error: RIG %d not available.\n", audio_config_p->achan[ch].octrl[ot].ptt_rig);
audio_config_p->achan[ch].octrl[ot].ptt_method = PTT_METHOD_NONE;
}
rig = audio_config_p->rig[audio_config_p->achan[ch].octrl[ot].ptt_rig];
retcode = rig_get_freq(rig, RIG_VFO_CURR, &freq);
if (retcode == RIG_OK) {
text_color_set(DW_COLOR_INFO);
dw_printf ("RIG tuned on %"PRIfreq"\n", freq);
} else {
text_color_set(DW_COLOR_ERROR);
dw_printf ("RIG rig_get_freq error %s, PTT probably will not work\n", rigerror(retcode));
}
}
}
}
}
#endif
/* Why doesn't it transmit? Probably forgot to specify PTT option. */
for (ch=0; ch<MAX_CHANS; ch++) {
if (audio_config_p->achan[ch].valid) {
if(audio_config_p->achan[ch].octrl[OCTYPE_PTT].ptt_method == PTT_METHOD_NONE) {
text_color_set(DW_COLOR_INFO);
dw_printf ("Note: PTT not configured for channel %d. (Ignore this if using VOX.)\n", ch);
}
}
}
} /* end ptt_init */
/*-------------------------------------------------------------------
*
* Name: ptt_set
*
* Purpose: Turn output control line on or off.
* Originally this was just for PTT, hence the name.
* Now that it is more general purpose, it should
* probably be renamed something like octrl_set.
*
* Inputs: ot - Output control type:
* OCTYPE_PTT, OCTYPE_DCD, OCTYPE_HAMLIB, OCTYPE_FUTURE
*
* chan - channel, 0 .. (number of channels)-1
*
* ptt_signal - 1 for transmit, 0 for receive.
*
*
* Assumption: ptt_init was called first.
*
* Description: Set the RTS or DTR line or GPIO pin.
* More positive output corresponds to 1 unless invert is set.
*
*--------------------------------------------------------------------*/
void ptt_set (int ot, int chan, int ptt_signal)
{
int ptt = ptt_signal;
int ptt2 = ptt_signal;
assert (ot >= 0 && ot < NUM_OCTYPES);
assert (chan >= 0 && chan < MAX_CHANS);
if (ptt_debug_level >= 1) {
text_color_set(DW_COLOR_DEBUG);
dw_printf ("%s %d = %d\n", otnames[ot], chan, ptt_signal);
}
assert (chan >= 0 && chan < MAX_CHANS);
if ( ! save_audio_config_p->achan[chan].valid) {
text_color_set(DW_COLOR_ERROR);
dw_printf ("Internal error, ptt_set ( %s, %d, %d ), did not expect invalid channel.\n", otnames[ot], chan, ptt);
return;
}
/*
* Inverted output?
*/
if (save_audio_config_p->achan[chan].octrl[ot].ptt_invert) {
ptt = ! ptt;
}
if (save_audio_config_p->achan[chan].octrl[ot].ptt_invert2) {
ptt2 = ! ptt2;
}
/*
* Using serial port?
*/
if (save_audio_config_p->achan[chan].octrl[ot].ptt_method == PTT_METHOD_SERIAL &&
ptt_fd[chan][ot] != INVALID_HANDLE_VALUE) {
if (save_audio_config_p->achan[chan].octrl[ot].ptt_line == PTT_LINE_RTS) {
if (ptt) {
RTS_ON(ptt_fd[chan][ot]);
}
else {
RTS_OFF(ptt_fd[chan][ot]);
}
}
else if (save_audio_config_p->achan[chan].octrl[ot].ptt_line == PTT_LINE_DTR) {
if (ptt) {
DTR_ON(ptt_fd[chan][ot]);
}
else {
DTR_OFF(ptt_fd[chan][ot]);
}
}
/*
* Second serial port control line? Typically driven with opposite phase but could be in phase.
*/
if (save_audio_config_p->achan[chan].octrl[ot].ptt_line2 == PTT_LINE_RTS) {
if (ptt2) {
RTS_ON(ptt_fd[chan][ot]);
}
else {
RTS_OFF(ptt_fd[chan][ot]);
}
}
else if (save_audio_config_p->achan[chan].octrl[ot].ptt_line2 == PTT_LINE_DTR) {
if (ptt2) {
DTR_ON(ptt_fd[chan][ot]);
}
else {
DTR_OFF(ptt_fd[chan][ot]);
}
}
/* else neither one */
}
/*
* Using GPIO?
*/
#if __WIN32__
#else
if (save_audio_config_p->achan[chan].octrl[ot].ptt_method == PTT_METHOD_GPIO) {
int fd;
char stemp[80];
sprintf (stemp, "/sys/class/gpio/gpio%d/value", save_audio_config_p->achan[chan].octrl[ot].ptt_gpio);
fd = open(stemp, O_WRONLY);
if (fd < 0) {
int e = errno;
text_color_set(DW_COLOR_ERROR);
dw_printf ("Error opening %s to set %s signal.\n", stemp, otnames[ot]);
dw_printf ("%s\n", strerror(e));
return;
}
sprintf (stemp, "%d", ptt);
if (write (fd, stemp, 1) != 1) {
int e = errno;
text_color_set(DW_COLOR_ERROR);
dw_printf ("Error setting GPIO %d for %s\n", save_audio_config_p->achan[chan].octrl[ot].ptt_gpio, otnames[ot]);
dw_printf ("%s\n", strerror(e));
}
close (fd);
}
#endif
/*
* Using parallel printer port?
*/
#if ( defined(__i386__) || defined(__x86_64__) ) && ( defined(__linux__) || defined(__unix__) )
if (save_audio_config_p->achan[chan].octrl[ot].ptt_method == PTT_METHOD_LPT &&
ptt_fd[chan][ot] != INVALID_HANDLE_VALUE) {
char lpt_data;
ssize_t n;
lseek (ptt_fd[chan][ot], (off_t)LPT_IO_ADDR, SEEK_SET);
if (read (ptt_fd[chan][ot], &lpt_data, (size_t)1) != 1) {
int e = errno;
text_color_set(DW_COLOR_ERROR);
dw_printf ("Error reading current state of LPT for channel %d %s\n", chan, otnames[ot]);
dw_printf ("%s\n", strerror(e));
}
if (ptt) {
lpt_data |= ( 1 << save_audio_config_p->achan[chan].octrl[ot].ptt_lpt_bit );
}
else {
lpt_data &= ~ ( 1 << save_audio_config_p->achan[chan].octrl[ot].ptt_lpt_bit );
}
lseek (ptt_fd[chan][ot], (off_t)LPT_IO_ADDR, SEEK_SET);
if (write (ptt_fd[chan][ot], &lpt_data, (size_t)1) != 1) {
int e = errno;
text_color_set(DW_COLOR_ERROR);
dw_printf ("Error writing to LPT for channel %d %s\n", chan, otnames[ot]);
dw_printf ("%s\n", strerror(e));
}
}
#endif /* x86 Linux */
#ifdef USE_HAMLIB
/*
* Using hamlib?
*/
if (save_audio_config_p->achan[chan].octrl[ot].ptt_method == PTT_METHOD_HAMLIB) {
int retcode;
RIG *rig = save_audio_config_p->rig[save_audio_config_p->achan[chan].octrl[ot].ptt_rig];
if ((retcode = rig_set_ptt(rig, RIG_VFO_CURR, ptt ? RIG_PTT_ON : RIG_PTT_OFF)) != RIG_OK) {
text_color_set(DW_COLOR_ERROR);
dw_printf ("Error sending rig_set_ptt command for channel %d %s\n", chan, otnames[ot]);
dw_printf ("%s\n", rigerror(retcode));
}
}
#endif
} /* end ptt_set */
/*-------------------------------------------------------------------
*
* Name: ptt_term
*
* Purpose: Make sure PTT and others are turned off when we exit.
*
* Inputs: none
*
* Description:
*
*--------------------------------------------------------------------*/
void ptt_term (void)
{
int n;
for (n = 0; n < MAX_CHANS; n++) {
if (save_audio_config_p->achan[n].valid) {
int ot;
for (ot = 0; ot < NUM_OCTYPES; ot++) {
ptt_set (ot, n, 0);
}
}
}
for (n = 0; n < MAX_CHANS; n++) {
if (save_audio_config_p->achan[n].valid) {
int ot;
for (ot = 0; ot < NUM_OCTYPES; ot++) {
if (ptt_fd[n][ot] != INVALID_HANDLE_VALUE) {
#if __WIN32__
CloseHandle (ptt_fd[n][ot]);
#else
close(ptt_fd[n][ot]);
#endif
ptt_fd[n][ot] = INVALID_HANDLE_VALUE;
}
}
}
}
#ifdef USE_HAMLIB
for (n = 0; n < save_audio_config_p->rigs; n++) {
RIG *rig = save_audio_config_p->rig[n];
int retcode;
if ((retcode = rig_set_ptt(rig, RIG_VFO_CURR, RIG_PTT_OFF)) != RIG_OK) {
text_color_set(DW_COLOR_ERROR);
dw_printf ("Error sending rig_set_ptt command for rig %d\n", n);
dw_printf ("%s\n", rigerror(retcode));
}
if ((retcode = rig_close(rig)) != RIG_OK) {
text_color_set(DW_COLOR_ERROR);
dw_printf ("Error sending rig_close command for rig %d\n", n);
dw_printf ("%s\n", rigerror(retcode));
}
if ((retcode = rig_cleanup(rig)) != RIG_OK) {
text_color_set(DW_COLOR_ERROR);
dw_printf ("Error sending rig_cleanup command for rig %d\n", n);
dw_printf ("%s\n", rigerror(retcode));
}
}
#endif
}
/*
* Quick stand-alone test for above.
*
* gcc -DTEST -o ptest ptt.c ; ./ptest
*
*/
#if TEST
void text_color_set (dw_color_t c) { }
#define dw_printf printf
main ()
{
struct audio_s my_audio_config;
int n;
int chan;
memset (&my_audio_config, 0, sizeof(my_audio_config));
my_audio_config.adev[0].num_channels = 2;
my_audio_config.valid[0] = 1;
my_audio_config.adev[0].octrl[OCTYPE_PTT].ptt_method = PTT_METHOD_SERIAL;
//strcpy (my_audio_config.ptt_device, "COM1");
strcpy (my_audio_config.ptt_device, "/dev/ttyUSB0");
my_audio_config.adev[0].octrl[OCTYPE_PTT].ptt_line = PTT_LINE_RTS;
my_audio_config.valid[1] = 1;
my_audio_config.adev[1].octrl[OCTYPE_PTT].ptt_method = PTT_METHOD_SERIAL;
//strcpy (my_audio_config.adev[1].octrl[OCTYPE_PTT].ptt_device, "COM1");
strcpy (my_audio_config.adev[1].octrl[OCTYPE_PTT].ptt_device, "/dev/ttyUSB0");
my_audio_config.adev[1].octrl[OCTYPE_PTT].ptt_line = PTT_LINE_DTR;
/* initialize - both off */
ptt_init (&my_audio_config);
SLEEP_SEC(2);
/* flash each a few times. */
dw_printf ("turn on RTS a few times...\n");
chan = 0;
for (n=0; n<3; n++) {
ptt_set (OCTYPE_PTT, chan, 1);
SLEEP_SEC(1);
ptt_set (OCTYPE_PTT, chan, 0);
SLEEP_SEC(1);
}
dw_printf ("turn on DTR a few times...\n");
chan = 1;
for (n=0; n<3; n++) {
ptt_set (OCTYPE_PTT, chan, 1);
SLEEP_SEC(1);
ptt_set (OCTYPE_PTT, chan, 0);
SLEEP_SEC(1);
}
ptt_term();
/* Same thing again but invert RTS. */
my_audio_config.adev[0].octrl[OCTYPE_PTT].ptt_invert = 1;
ptt_init (&my_audio_config);
SLEEP_SEC(2);
dw_printf ("INVERTED - RTS a few times...\n");
chan = 0;
for (n=0; n<3; n++) {
ptt_set (OCTYPE_PTT, chan, 1);
SLEEP_SEC(1);
ptt_set (OCTYPE_PTT, chan, 0);
SLEEP_SEC(1);
}
dw_printf ("turn on DTR a few times...\n");
chan = 1;
for (n=0; n<3; n++) {
ptt_set (OCTYPE_PTT, chan, 1);
SLEEP_SEC(1);
ptt_set (OCTYPE_PTT, chan, 0);
SLEEP_SEC(1);
}
ptt_term ();
/* Test GPIO */
#if __arm__
memset (&my_audio_config, 0, sizeof(my_audio_config));
my_audio_config.adev[0].num_channels = 1;
my_audio_config.valid[0] = 1;
my_audio_config.adev[0].octrl[OCTYPE_PTT].ptt_method = PTT_METHOD_GPIO;
my_audio_config.adev[0].octrl[OCTYPE_PTT].ptt_gpio = 25;
dw_printf ("Try GPIO %d a few times...\n", my_audio_config.ptt_gpio[0]);
ptt_init (&my_audio_config);
SLEEP_SEC(2);
chan = 0;
for (n=0; n<3; n++) {