forked from indilib/indi
-
Notifications
You must be signed in to change notification settings - Fork 0
/
Copy pathindicom.c
1335 lines (1121 loc) · 33 KB
/
indicom.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
/*
INDI LIB
Common routines used by all drivers
Copyright (C) 2003 by Jason Harris ([email protected])
Elwood C. Downey
This is the C version of the astronomical library in KStars
modified by Jasem Mutlaq ([email protected])
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#define _GNU_SOURCE 1
#include <stdlib.h>
#include <math.h>
#include <stdio.h>
#include <string.h>
#include <fcntl.h>
#include <errno.h>
#include <stdarg.h>
#include <stdint.h>
#include <locale.h>
#ifdef __APPLE__
#include <sys/param.h>
#endif
#if defined(BSD) && !defined(__GNU__)
#include <IOKit/serial/ioss.h>
#include <sys/ioctl.h>
#endif
#include <config.h>
#include <libnova.h>
#include "indicom.h"
#include "indidevapi.h"
#ifdef _WIN32
#undef CX
#undef CY
#endif
#ifndef _WIN32
#include <unistd.h>
#include <termios.h>
#include <sys/param.h>
#define PARITY_NONE 0
#define PARITY_EVEN 1
#define PARITY_ODD 2
#endif
#if defined( _MSC_VER )
#define snprintf _snprintf
#pragma warning(push)
///@todo Introduce plattform indipendent safe functions as macros to fix this
#pragma warning(disable: 4996)
#endif
#define MAXRBUF 2048
int tty_debug = 0;
#ifndef _WIN32
int extractISOTime(const char *timestr, struct ln_date *iso_date)
{
struct tm utm;
if (strptime(timestr, "%Y/%m/%dT%H:%M:%S", &utm))
{
ln_get_date_from_tm(&utm, iso_date);
return (0);
}
if (strptime(timestr, "%Y-%m-%dT%H:%M:%S", &utm))
{
ln_get_date_from_tm(&utm, iso_date);
return (0);
}
return (-1);
}
#endif
/* sprint the variable a in sexagesimal format into out[].
* w is the number of spaces for the whole part.
* fracbase is the number of pieces a whole is to broken into; valid options:
* 360000: <w>:mm:ss.ss
* 36000: <w>:mm:ss.s
* 3600: <w>:mm:ss
* 600: <w>:mm.m
* 60: <w>:mm
* return number of characters written to out, not counting final '\0'.
*/
int
fs_sexa (char *out, double a, int w, int fracbase)
{
char *out0 = out;
unsigned long n;
int d;
int f;
int m;
int s;
int isneg;
/* save whether it's negative but do all the rest with a positive */
isneg = (a < 0);
if (isneg)
a = -a;
/* convert to an integral number of whole portions */
n = (unsigned long)(a * fracbase + 0.5);
d = n/fracbase;
f = n%fracbase;
/* form the whole part; "negative 0" is a special case */
if (isneg && d == 0)
out += snprintf (out, MAXINDIFORMAT, "%*s-0", w-2, "");
else
out += snprintf (out, MAXINDIFORMAT, "%*d", w, isneg ? -d : d);
/* do the rest */
switch (fracbase) {
case 60: /* dd:mm */
m = f/(fracbase/60);
out += snprintf (out, MAXINDIFORMAT, ":%02d", m);
break;
case 600: /* dd:mm.m */
out += snprintf (out, MAXINDIFORMAT, ":%02d.%1d", f/10, f%10);
break;
case 3600: /* dd:mm:ss */
m = f/(fracbase/60);
s = f%(fracbase/60);
out += snprintf (out, MAXINDIFORMAT, ":%02d:%02d", m, s);
break;
case 36000: /* dd:mm:ss.s*/
m = f/(fracbase/60);
s = f%(fracbase/60);
out += snprintf (out, MAXINDIFORMAT, ":%02d:%02d.%1d", m, s/10, s%10);
break;
case 360000: /* dd:mm:ss.ss */
m = f/(fracbase/60);
s = f%(fracbase/60);
out += snprintf (out, MAXINDIFORMAT, ":%02d:%02d.%02d", m, s/100, s%100);
break;
default:
printf ("fs_sexa: unknown fracbase: %d\n", fracbase);
return -1;
}
return (out - out0);
}
/* convert sexagesimal string str AxBxC to double.
* x can be anything non-numeric. Any missing A, B or C will be assumed 0.
* optional - and + can be anywhere.
* return 0 if ok, -1 if can't find a thing.
*/
int
f_scansexa (
const char *str0, /* input string */
double *dp) /* cracked value, if return 0 */
{
char *orig = setlocale(LC_NUMERIC,"C");
double a = 0, b = 0, c = 0;
char str[128];
char *neg;
int r;
/* copy str0 so we can play with it */
strncpy (str, str0, sizeof(str)-1);
str[sizeof(str)-1] = '\0';
neg = strchr(str, '-');
if (neg)
*neg = ' ';
r = sscanf (str, "%lf%*[^0-9]%lf%*[^0-9]%lf", &a, &b, &c);
setlocale(LC_NUMERIC,orig);
if (r < 1)
return (-1);
*dp = a + b/60 + c/3600;
if (neg)
*dp *= -1;
return (0);
}
void getSexComponents(double value, int *d, int *m, int *s)
{
*d = (int32_t) fabs(value);
*m = (int32_t) ((fabs(value) - *d) * 60.0);
*s = (int32_t) rint(((fabs(value) - *d) * 60.0 - *m) *60.0);
if (value < 0)
*d *= -1;
}
/* fill buf with properly formatted INumber string. return length */
int
numberFormat (char *buf, const char *format, double value)
{
int w, f, s;
char m;
if (sscanf (format, "%%%d.%d%c", &w, &f, &m) == 3 && m == 'm') {
/* INDI sexi format */
switch (f) {
case 9: s = 360000; break;
case 8: s = 36000; break;
case 6: s = 3600; break;
case 5: s = 600; break;
default: s = 60; break;
}
return (fs_sexa (buf, value, w-f, s));
} else {
/* normal printf format */
return (snprintf (buf, MAXINDIFORMAT, format, value));
}
}
/* log message locally.
* this has nothing to do with XML or any Clients.
*/
void
IDLog (const char *fmt, ...)
{
va_list ap;
/* JM: Since all INDI's stderr are timestampped now, we don't need to time stamp ID Log */
/*fprintf (stderr, "%s ", timestamp());*/
va_start (ap, fmt);
vfprintf (stderr, fmt, ap);
va_end (ap);
}
/* return current system time in message format */
const char *
timestamp()
{
static char ts[32];
struct tm *tp;
time_t t;
time (&t);
tp = gmtime (&t);
strftime (ts, sizeof(ts), "%Y-%m-%dT%H:%M:%S", tp);
return (ts);
}
void tty_set_debug(int debug)
{
tty_debug = debug;
}
int tty_timeout(int fd, int timeout)
{
#if defined(_WIN32) || defined(ANDROID)
return TTY_ERRNO;
#else
if (fd == -1)
return TTY_ERRNO;
struct timeval tv;
fd_set readout;
int retval;
FD_ZERO(&readout);
FD_SET(fd, &readout);
/* wait for 'timeout' seconds */
tv.tv_sec = timeout;
tv.tv_usec = 0;
/* Wait till we have a change in the fd status */
retval = select (fd+1, &readout, NULL, NULL, &tv);
/* Return 0 on successful fd change */
if (retval > 0)
return TTY_OK;
/* Return -1 due to an error */
else if (retval == -1)
return TTY_SELECT_ERROR;
/* Return -2 if time expires before anything interesting happens */
else
return TTY_TIME_OUT;
#endif
}
int tty_write(int fd, const char * buf, int nbytes, int *nbytes_written)
{
#ifdef _WIN32
return TTY_ERRNO;
#else
if (fd == -1)
return TTY_ERRNO;
int bytes_w = 0;
*nbytes_written = 0;
if (tty_debug)
{
int i=0;
for (i=0; i < nbytes; i++)
IDLog("%s: buffer[%d]=%#X (%c)\n", __FUNCTION__, i, (unsigned char) buf[i], buf[i]);
}
while (nbytes > 0)
{
bytes_w = write(fd, buf+(*nbytes_written), nbytes);
if (bytes_w < 0)
return TTY_WRITE_ERROR;
*nbytes_written += bytes_w;
//buf += bytes_w;
nbytes -= bytes_w;
}
return TTY_OK;
#endif
}
int tty_write_string(int fd, const char * buf, int *nbytes_written)
{
#ifdef _WIN32
return TTY_ERRNO;
#else
if (fd == -1)
return TTY_ERRNO;
unsigned int nbytes;
int bytes_w = 0;
*nbytes_written = 0;
nbytes = strlen(buf);
if (tty_debug)
{
int i=0;
for (i=0; i < nbytes; i++)
IDLog("%s: buffer[%d]=%#X (%c)\n", __FUNCTION__, i, (unsigned char) buf[i], buf[i]);
}
while (nbytes > 0)
{
bytes_w = write(fd, buf+(*nbytes_written), nbytes);
if (bytes_w < 0)
return TTY_WRITE_ERROR;
*nbytes_written += bytes_w;
//buf += bytes_w;
nbytes -= bytes_w;
}
return TTY_OK;
#endif
}
int tty_read(int fd, char *buf, int nbytes, int timeout, int *nbytes_read)
{
#ifdef _WIN32
return TTY_ERRNO;
#else
if (fd == -1)
return TTY_ERRNO;
int bytesRead = 0;
int err = 0;
*nbytes_read =0;
if (nbytes <=0)
return TTY_PARAM_ERROR;
if (tty_debug)
IDLog("%s: Request to read %d bytes with %d timeout for fd %d\n", __FUNCTION__, nbytes, timeout, fd);
while (nbytes > 0)
{
if ( (err = tty_timeout(fd, timeout)) )
return err;
bytesRead = read(fd, buf+(*nbytes_read), ((uint32_t) nbytes));
if (bytesRead < 0 )
return TTY_READ_ERROR;
if (tty_debug)
{
IDLog("%d bytes read and %d bytes remaining...\n", bytesRead, nbytes-bytesRead);
int i=0;
for (i=*nbytes_read; i < (*nbytes_read+bytesRead); i++)
IDLog("%s: buffer[%d]=%#X (%c)\n", __FUNCTION__, i, (unsigned char) buf[i], buf[i]);
}
*nbytes_read += bytesRead;
nbytes -= bytesRead;
}
return TTY_OK;
#endif
}
int tty_read_section(int fd, char *buf, char stop_char, int timeout, int *nbytes_read)
{
#ifdef _WIN32
return TTY_ERRNO;
#else
if (fd == -1)
return TTY_ERRNO;
int bytesRead = 0;
int err = TTY_OK;
*nbytes_read = 0;
uint8_t *read_char = 0;
if (tty_debug)
IDLog("%s: Request to read until stop char '%c' with %d timeout for fd %d\n", __FUNCTION__, stop_char, timeout, fd);
for (;;)
{
if ( (err = tty_timeout(fd, timeout)) )
return err;
read_char = buf+*nbytes_read;
bytesRead = read(fd, read_char, 1);
if (bytesRead < 0 )
return TTY_READ_ERROR;
if (tty_debug)
IDLog("%s: buffer[%d]=%#X (%c)\n", __FUNCTION__, (*nbytes_read), *read_char, *read_char);
(*nbytes_read)++;
if (*read_char == stop_char)
return TTY_OK;
}
return TTY_TIME_OUT;
#endif
}
#if defined(BSD) && !defined(__GNU__)
// BSD - OSX version
int tty_connect(const char *device, int bit_rate, int word_size, int parity, int stop_bits, int *fd)
{
int t_fd = -1;
int bps;
char msg[80];
int handshake;
struct termios tty_setting;
// Open the serial port read/write, with no controlling terminal, and don't wait for a connection.
// The O_NONBLOCK flag also causes subsequent I/O on the device to be non-blocking.
// See open(2) ("man 2 open") for details.
t_fd = open(device, O_RDWR | O_NOCTTY | O_NONBLOCK);
if (t_fd == -1)
{
printf("Error opening serial port %s - %s(%d).\n",
device, strerror(errno), errno);
goto error;
}
// Note that open() follows POSIX semantics: multiple open() calls to the same file will succeed
// unless the TIOCEXCL ioctl is issued. This will prevent additional opens except by root-owned
// processes.
// See tty(4) ("man 4 tty") and ioctl(2) ("man 2 ioctl") for details.
if (ioctl(t_fd, TIOCEXCL) == -1)
{
printf("Error setting TIOCEXCL on %s - %s(%d).\n",
device, strerror(errno), errno);
goto error;
}
// Now that the device is open, clear the O_NONBLOCK flag so subsequent I/O will block.
// See fcntl(2) ("man 2 fcntl") for details.
if (fcntl(t_fd, F_SETFL, 0) == -1)
{
printf("Error clearing O_NONBLOCK %s - %s(%d).\n",
device, strerror(errno), errno);
goto error;
}
// Get the current options and save them so we can restore the default settings later.
if (tcgetattr(t_fd, &tty_setting) == -1)
{
printf("Error getting tty attributes %s - %s(%d).\n",
device, strerror(errno), errno);
goto error;
}
// Set raw input (non-canonical) mode, with reads blocking until either a single character
// has been received or a one second timeout expires.
// See tcsetattr(4) ("man 4 tcsetattr") and termios(4) ("man 4 termios") for details.
cfmakeraw(&tty_setting);
tty_setting.c_cc[VMIN] = 1;
tty_setting.c_cc[VTIME] = 10;
// The baud rate, word length, and handshake options can be set as follows:
switch (bit_rate) {
case 0:
bps = B0;
break;
case 50:
bps = B50;
break;
case 75:
bps = B75;
break;
case 110:
bps = B110;
break;
case 134:
bps = B134;
break;
case 150:
bps = B150;
break;
case 200:
bps = B200;
break;
case 300:
bps = B300;
break;
case 600:
bps = B600;
break;
case 1200:
bps = B1200;
break;
case 1800:
bps = B1800;
break;
case 2400:
bps = B2400;
break;
case 4800:
bps = B4800;
break;
case 9600:
bps = B9600;
break;
case 19200:
bps = B19200;
break;
case 38400:
bps = B38400;
break;
case 57600:
bps = B57600;
break;
case 115200:
bps = B115200;
break;
case 230400:
bps = B230400;
break;
default:
if (snprintf(msg, sizeof(msg), "tty_connect: %d is not a valid bit rate.", bit_rate) < 0)
perror(NULL);
else
perror(msg);
return TTY_PARAM_ERROR;
}
cfsetspeed(&tty_setting, bps); // Set baud rate
/* word size */
switch (word_size) {
case 5:
tty_setting.c_cflag |= CS5;
break;
case 6:
tty_setting.c_cflag |= CS6;
break;
case 7:
tty_setting.c_cflag |= CS7;
break;
case 8:
tty_setting.c_cflag |= CS8;
break;
default:
fprintf( stderr, "Default\n") ;
if (snprintf(msg, sizeof(msg), "tty_connect: %d is not a valid data bit count.", word_size) < 0)
perror(NULL);
else
perror(msg);
return TTY_PARAM_ERROR;
}
/* parity */
switch (parity) {
case PARITY_NONE:
break;
case PARITY_EVEN:
tty_setting.c_cflag |= PARENB;
break;
case PARITY_ODD:
tty_setting.c_cflag |= PARENB | PARODD;
break;
default:
fprintf( stderr, "Default1\n") ;
if (snprintf(msg, sizeof(msg), "tty_connect: %d is not a valid parity selection value.", parity) < 0)
perror(NULL);
else
perror(msg);
return TTY_PARAM_ERROR;
}
/* stop_bits */
switch (stop_bits) {
case 1:
break;
case 2:
tty_setting.c_cflag |= CSTOPB;
break;
default:
fprintf( stderr, "Default2\n") ;
if (snprintf(msg, sizeof(msg), "tty_connect: %d is not a valid stop bit count.", stop_bits) < 0)
perror(NULL);
else
perror(msg);
return TTY_PARAM_ERROR;
}
#if defined(MAC_OS_X_VERSION_10_4) && (MAC_OS_X_VERSION_MIN_REQUIRED >= MAC_OS_X_VERSION_10_4)
// Starting with Tiger, the IOSSIOSPEED ioctl can be used to set arbitrary baud rates
// other than those specified by POSIX. The driver for the underlying serial hardware
// ultimately determines which baud rates can be used. This ioctl sets both the input
// and output speed.
speed_t speed = 14400; // Set 14400 baud
if (ioctl(t_fd, IOSSIOSPEED, &speed) == -1)
{
printf("Error calling ioctl(..., IOSSIOSPEED, ...) - %s(%d).\n",
strerror(errno), errno);
}
#endif
// Cause the new options to take effect immediately.
if (tcsetattr(t_fd, TCSANOW, &tty_setting) == -1)
{
printf("Error setting tty attributes %s - %s(%d).\n",
device, strerror(errno), errno);
goto error;
}
// To set the modem handshake lines, use the following ioctls.
// See tty(4) ("man 4 tty") and ioctl(2) ("man 2 ioctl") for details.
if (ioctl(t_fd, TIOCSDTR) == -1) // Assert Data Terminal Ready (DTR)
{
printf("Error asserting DTR %s - %s(%d).\n",
device, strerror(errno), errno);
}
if (ioctl(t_fd, TIOCCDTR) == -1) // Clear Data Terminal Ready (DTR)
{
printf("Error clearing DTR %s - %s(%d).\n",
device, strerror(errno), errno);
}
handshake = TIOCM_DTR | TIOCM_RTS | TIOCM_CTS | TIOCM_DSR;
if (ioctl(t_fd, TIOCMSET, &handshake) == -1)
// Set the modem lines depending on the bits set in handshake
{
printf("Error setting handshake lines %s - %s(%d).\n",
device, strerror(errno), errno);
}
// To read the state of the modem lines, use the following ioctl.
// See tty(4) ("man 4 tty") and ioctl(2) ("man 2 ioctl") for details.
if (ioctl(t_fd, TIOCMGET, &handshake) == -1)
// Store the state of the modem lines in handshake
{
printf("Error getting handshake lines %s - %s(%d).\n",
device, strerror(errno), errno);
}
printf("Handshake lines currently set to %d\n", handshake);
#if defined(MAC_OS_X_VERSION_10_3) && (MAC_OS_X_VERSION_MIN_REQUIRED >= MAC_OS_X_VERSION_10_3)
unsigned long mics = 1UL;
// Set the receive latency in microseconds. Serial drivers use this value to determine how often to
// dequeue characters received by the hardware. Most applications don't need to set this value: if an
// app reads lines of characters, the app can't do anything until the line termination character has been
// received anyway. The most common applications which are sensitive to read latency are MIDI and IrDA
// applications.
if (ioctl(t_fd, IOSSDATALAT, &mics) == -1)
{
// set latency to 1 microsecond
printf("Error setting read latency %s - %s(%d).\n",
device, strerror(errno), errno);
goto error;
}
#endif
*fd = t_fd;
/* return success */
return TTY_OK;
// Failure path
error:
if (t_fd != -1)
{
close(t_fd);
*fd = -1;
}
return TTY_PORT_FAILURE;
}
#else
int tty_connect(const char *device, int bit_rate, int word_size, int parity, int stop_bits, int *fd)
{
#ifdef _WIN32
return TTY_PORT_FAILURE;
#else
int t_fd=-1;
char msg[80];
int bps;
struct termios tty_setting;
if ( (t_fd = open(device, O_RDWR | O_NOCTTY )) == -1)
{
*fd = -1;
return TTY_PORT_FAILURE;
}
/* Control Modes
Set bps rate */
switch (bit_rate) {
case 0:
bps = B0;
break;
case 50:
bps = B50;
break;
case 75:
bps = B75;
break;
case 110:
bps = B110;
break;
case 134:
bps = B134;
break;
case 150:
bps = B150;
break;
case 200:
bps = B200;
break;
case 300:
bps = B300;
break;
case 600:
bps = B600;
break;
case 1200:
bps = B1200;
break;
case 1800:
bps = B1800;
break;
case 2400:
bps = B2400;
break;
case 4800:
bps = B4800;
break;
case 9600:
bps = B9600;
break;
case 19200:
bps = B19200;
break;
case 38400:
bps = B38400;
break;
case 57600:
bps = B57600;
break;
case 115200:
bps = B115200;
break;
case 230400:
bps = B230400;
break;
default:
if (snprintf(msg, sizeof(msg), "tty_connect: %d is not a valid bit rate.", bit_rate) < 0)
perror(NULL);
else
perror(msg);
return TTY_PARAM_ERROR;
}
if ((cfsetispeed(&tty_setting, bps) < 0) ||
(cfsetospeed(&tty_setting, bps) < 0))
{
perror("tty_connect: failed setting bit rate.");
return TTY_PORT_FAILURE;
}
/* Control Modes
set no flow control word size, parity and stop bits.
Also don't hangup automatically and ignore modem status.
Finally enable receiving characters. */
tty_setting.c_cflag &= ~(CSIZE | CSTOPB | PARENB | PARODD | HUPCL | CRTSCTS);
tty_setting.c_cflag |= (CLOCAL | CREAD);
/* word size */
switch (word_size) {
case 5:
tty_setting.c_cflag |= CS5;
break;
case 6:
tty_setting.c_cflag |= CS6;
break;
case 7:
tty_setting.c_cflag |= CS7;
break;
case 8:
tty_setting.c_cflag |= CS8;
break;
default:
fprintf( stderr, "Default\n") ;
if (snprintf(msg, sizeof(msg), "tty_connect: %d is not a valid data bit count.", word_size) < 0)
perror(NULL);
else
perror(msg);
return TTY_PARAM_ERROR;
}
/* parity */
switch (parity) {
case PARITY_NONE:
break;
case PARITY_EVEN:
tty_setting.c_cflag |= PARENB;
break;
case PARITY_ODD:
tty_setting.c_cflag |= PARENB | PARODD;
break;
default:
fprintf( stderr, "Default1\n") ;
if (snprintf(msg, sizeof(msg), "tty_connect: %d is not a valid parity selection value.", parity) < 0)
perror(NULL);
else
perror(msg);
return TTY_PARAM_ERROR;
}
/* stop_bits */
switch (stop_bits) {
case 1:
break;
case 2:
tty_setting.c_cflag |= CSTOPB;
break;
default:
fprintf( stderr, "Default2\n") ;
if (snprintf(msg, sizeof(msg), "tty_connect: %d is not a valid stop bit count.", stop_bits) < 0)
perror(NULL);
else
perror(msg);
return TTY_PARAM_ERROR;
}
/* Control Modes complete */
/* Ignore bytes with parity errors and make terminal raw and dumb.*/
tty_setting.c_iflag &= ~(PARMRK | ISTRIP | IGNCR | ICRNL | INLCR | IXOFF | IXON | IXANY);
tty_setting.c_iflag |= INPCK | IGNPAR | IGNBRK;
/* Raw output.*/
tty_setting.c_oflag &= ~(OPOST | ONLCR);
/* Local Modes
Don't echo characters. Don't generate signals.
Don't process any characters.*/
tty_setting.c_lflag &= ~(ICANON | ECHO | ECHOE | ISIG | IEXTEN | NOFLSH | TOSTOP);
tty_setting.c_lflag |= NOFLSH;
/* blocking read until 1 char arrives */
tty_setting.c_cc[VMIN] = 1;
tty_setting.c_cc[VTIME] = 0;
/* now clear input and output buffers and activate the new terminal settings */
tcflush(t_fd, TCIOFLUSH);
if (tcsetattr(t_fd, TCSANOW, &tty_setting))
{
perror("tty_connect: failed setting attributes on serial port.");
tty_disconnect(t_fd);
return TTY_PORT_FAILURE;
}
*fd = t_fd;
/* return success */
return TTY_OK;
#endif
}
// Unix - Linux version
#endif
int tty_disconnect(int fd)
{
if (fd == -1)
return TTY_ERRNO;
#ifdef _WIN32
return TTY_ERRNO;
#else
int err;
tcflush(fd, TCIOFLUSH);
err = close(fd);
if (err != 0)
return TTY_ERRNO;
return TTY_OK;
#endif
}
void tty_error_msg(int err_code, char *err_msg, int err_msg_len)
{
char error_string[512];
switch (err_code)
{
case TTY_OK:
strncpy(err_msg, "No Error", err_msg_len);
break;
case TTY_READ_ERROR:
snprintf(error_string, 512, "Read Error: %s", strerror(errno));
strncpy(err_msg, error_string, err_msg_len);
break;
case TTY_WRITE_ERROR:
snprintf(error_string, 512, "Write Error: %s", strerror(errno));
strncpy(err_msg, error_string, err_msg_len);
break;
case TTY_SELECT_ERROR:
snprintf(error_string, 512, "Select Error: %s", strerror(errno));
strncpy(err_msg, error_string, err_msg_len);
break;
case TTY_TIME_OUT: