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Clone from http://pc-instru.lpp.polytechnique.fr:5000/lppserial

Removed ugly bug in serial port enumeration on linux.
Jeandet Alexis -
r45:def3deb8bd34 qt
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@@ -1,51 +1,50
1 // SOPSUYSI_RS232.h
2 1 #ifndef RS232_H
3 2 #define RS232_H
4 3
5 4 #define badPortValue -1
6 5 #define rs232noerr 0
7 6 typedef int rs232port_t;
8 7 typedef int rs232speed_t;
9 8 typedef enum {rs232OneStop,rs232One5Stop,rs232TwoStop}rs232stop;
10 9 typedef enum {rs232parityNo,rs232parityOdd,rs232parityEven}rs232parity;
11 10
12 11 #ifdef __cplusplus
13 12 extern "C" {
14 13 #endif
15 14 typedef struct rs232portslist_t
16 15 {
17 16 char* name;
18 17 struct rs232portslist_t* next;
19 18 }rs232portslist_t;
20 19 #ifdef __cplusplus
21 20 }
22 21 #endif
23 22
24 23
25 24 #ifdef __cplusplus
26 25 #define rs232extern extern "C"
27 26 #else
28 27 #define rs232extern extern
29 28 #endif
30 29 rs232extern rs232port_t rs232open(char* psPortName);
31 30 rs232extern rs232portslist_t* rs232getportlist();
32 31 rs232extern void rs232deleteportlist(rs232portslist_t* list);
33 32 rs232extern int rs232close(rs232port_t fd);
34 33 rs232extern int rs232setup(rs232port_t fd, int ChSize, int BaudeRate, rs232parity Parity, rs232stop NbStop);
35 34 rs232extern int rs232write(rs232port_t fd,char *psWrite, int WriteBufferSize);
36 35 rs232extern int rs232read(rs232port_t fd,char *psRead, int ReadBufferSize);
37 36 rs232extern int rs232setparity(rs232port_t fd, rs232parity Parity);
38 37 rs232extern int rs232setnbstop(rs232port_t fd, rs232stop NbStop);
39 38 rs232extern int rs232setcsize(rs232port_t fd, int ChSize);
40 39 rs232extern int rs232setbaudrate(rs232port_t fd, int baudrate);
41 40 rs232extern int rs232setRTS(rs232port_t fd);
42 41 rs232extern int rs232clearRTS(rs232port_t fd);
43 42 rs232extern int rs232setDTR(rs232port_t fd);
44 43 rs232extern int rs232clearDTR(rs232port_t fd);
45 44 rs232extern int rs232saferead(rs232port_t fd,char* data,int count );
46 45 rs232extern int rs232safewrite(rs232port_t fd,char* data,int count);
47 46
48 47 #endif
49 48
50 49
51 50
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@@ -1,548 +1,532
1 1 #include <stdio.h>
2 2 #include <unistd.h>
3 3 #include <fcntl.h>
4 4 #include <string.h>
5 5 #include <errno.h>
6 6 #include <malloc.h>
7 7 #include <dirent.h>
8 8 #include <limits.h>
9 9 #include <stdlib.h>
10 10 #include <sys/stat.h>
11 11
12 12 #include <termios.h>
13 13 #include <termio.h>
14 14 #include "RS232.h"
15 15
16 16 rs232speed_t rs232cfspeed(unsigned int BaudeRate);
17 17
18 18 rs232port_t rs232open(char* psPortName)
19 19 {
20 20 rs232port_t fd;
21 21 int flags;
22 22 fd = (rs232port_t)open(psPortName, O_RDWR | O_NOCTTY );//| O_NDELAY);
23 23 //fcntl((int)fd, F_SETFL, FNDELAY);
24 24 //fd = open(psPortName, O_RDWR | O_NOCTTY);
25 25 #ifdef RS232_debug
26 26 if(fd==-1)printf("can't open Port\n");
27 27 #else
28 28 if(fd!=-1)
29 29 {
30 30 //flags = fcntl(fd, F_GETFL);
31 31 //flags |= O_NONBLOCK;
32 32 //flags|=FNDELAY;
33 33 //fcntl(fd, F_SETFL, flags);
34 34 //fcntl((int)fd, F_SETFL, FNDELAY);
35 35 }
36 36
37 37 #endif
38 38 return fd;
39 39 }
40 40
41 41 int rs232close(rs232port_t fd)
42 42 {
43 43 if ((int)fd == -1)
44 44 {
45 45 return -1;
46 46 }
47 47 else
48 48 {
49 49 close(fd);
50 50 return 0;
51 51 }
52 52 }
53 53
54 54 rs232portslist_t* rs232getportlist()
55 55 {
56 56 struct dirent *dp;
57 57 char* path="/dev/serial/by-id";
58 58 DIR *dir = opendir(path);
59 59 rs232portslist_t* firstitem=NULL;
60 60 rs232portslist_t* previtem=NULL;
61 char linkname[1024];
61 char* linkname;
62 char* devName;
62 63 int i=0;
63 64 if(dir!=NULL)
64 65 {
65 66 while ((dp=readdir(dir)) != NULL)
66 67 {
67 char* name = (char*)malloc(1024);
68 for(i=0;i<1024;i++)
69 {
70 name[i]='\0';
71 linkname[i]='\0';
72 }
68 int len = strlen(path)+strlen(dp->d_name)+8;//+8 => let's put some margin
69 linkname = (char*)malloc(len);
70 memset(linkname,'\0',len);
73 71 struct stat statbuf;
74 72 strcpy(linkname,path);
75 73 strcat(linkname,"/");
76 74 strcat(linkname,dp->d_name);
77 75 lstat(linkname, &statbuf);
78 76 if(S_ISLNK(statbuf.st_mode))
79 77 {
80 if(-1!=readlink(linkname,name,1024))
81 {
82 for(i=0;i<1024;i++)
83 {
84 linkname[i]='\0';
85 }
86 strcpy(linkname,path);
87 strcat(linkname,"/");
88 strcat(linkname,name);
89 for(i=0;i<1024;i++)
90 {
91 name[i]='\0';
92 }
93 if(NULL!=realpath(linkname, name))
78 devName=realpath(linkname, NULL);
79 if(devName!=NULL)
94 80 {
95 81 rs232portslist_t* item = (rs232portslist_t*)malloc(sizeof(rs232portslist_t));
96 item->name = name;
82 item->name = devName;
97 83 item->next = NULL;
98 84 if(NULL!=previtem)previtem->next = item;
99 85 previtem = item;
100 86 if(NULL==firstitem)firstitem = item;
101 87 }
102
103 88 }
104 }
105
89 free(linkname);
106 90 }
107 91 }
108 92 return firstitem;
109 93 }
110 94
111 95 void rs232deleteportlist(rs232portslist_t* list)
112 96 {
113 97 if(list!=NULL)
114 98 {
115 99 if(list->next != NULL)
116 100 rs232deleteportlist(list->next);
117 101 free(list);
118 102 }
119 103 }
120 104
121 105 int rs232setup(rs232port_t fd, int ChSize, int BaudeRate, rs232parity Parity, rs232stop NbStop)
122 106 {
123 107 if ((int)fd == -1)
124 108 {
125 109 return -1;
126 110 }
127 111 else
128 112 {
129 113 struct termios terminos;
130 114 tcgetattr(fd, &terminos);
131 115 terminos.c_iflag=0;
132 116 terminos.c_oflag=0;
133 117 terminos.c_cflag=0;
134 118 terminos.c_lflag=0;
135 119 cfsetispeed(&terminos, rs232cfspeed(BaudeRate));
136 120 cfsetospeed(&terminos, rs232cfspeed(BaudeRate));
137 121 terminos.c_cflag |= (CLOCAL | CREAD);
138 122 rs232cfparity((int)fd, &terminos, Parity);
139 123 rs232cfnbstop((int)fd, &terminos, NbStop);
140 124 rs232cfcsize((int)fd, &terminos, ChSize);
141 125 terminos.c_cc[VMIN]=0;
142 126 terminos.c_cc[VTIME]=1;
143 127 tcflush(fd, TCIFLUSH);
144 128 #ifdef RS232_debug
145 129 if(tcsetattr(fd, TCSANOW, &terminos)!=0)printf("bad setup\n");
146 130 #else
147 131 tcsetattr(fd, TCSANOW, &terminos);
148 132 #endif
149 133 return 0;
150 134 }
151 135 }
152 136
153 137 int rs232setbaudrate(rs232port_t fd, int baudrate)
154 138 {
155 139 if ((int)fd == -1)
156 140 {
157 141 return fd;
158 142 }
159 143 else
160 144 {
161 145 struct termios terminos;
162 146 tcgetattr((int)fd, &terminos);
163 147 cfsetispeed(&terminos, rs232cfspeed(baudrate));
164 148 cfsetospeed(&terminos, rs232cfspeed(baudrate));
165 149 tcsetattr((int)fd, TCSANOW, &terminos);
166 150 return 0;
167 151 }
168 152 }
169 153
170 154 int rs232setparity(rs232port_t fd, rs232parity Parity)
171 155 {
172 156 if ((int)fd == -1)
173 157 {
174 158 return fd;
175 159 }
176 160 else
177 161 {
178 162 struct termios terminos;
179 163 tcgetattr((int)fd, &terminos);
180 164 terminos.c_cflag &= ~PARENB;
181 165 terminos.c_cflag &= ~PARODD;
182 166 switch(Parity)
183 167 {
184 168 case rs232parityNo:
185 169 terminos.c_cflag &= ~PARENB;
186 170 break;
187 171 case rs232parityOdd:
188 172 terminos.c_cflag |= PARENB;
189 173 terminos.c_cflag |= PARODD;
190 174 break;
191 175 case rs232parityEven:
192 176 terminos.c_cflag |= PARENB;
193 177 terminos.c_cflag &= ~PARODD;
194 178 break;
195 179 default:
196 180 terminos.c_cflag &= ~PARENB;
197 181 break;
198 182 }
199 183 tcsetattr((int)fd, TCSANOW, &terminos);
200 184 return 0;
201 185 }
202 186 }
203 187
204 188 int rs232setnbstop(rs232port_t fd, rs232stop NbStop)
205 189 {
206 190 if ((int)fd == -1)
207 191 {
208 192 return fd;
209 193 }
210 194 else
211 195 {
212 196 struct termios terminos;
213 197 tcgetattr((int)fd, &terminos);
214 198 switch(NbStop)
215 199 {
216 200 case rs232OneStop:
217 201 terminos.c_cflag &= ~CSTOPB;
218 202 break;
219 203 case rs232One5Stop:
220 204 terminos.c_cflag |= CSTOPB;
221 205 break;
222 206 case rs232TwoStop:
223 207 terminos.c_cflag |= CSTOPB;
224 208 break;
225 209 default:
226 210 terminos.c_cflag &= ~CSTOPB;
227 211 break;
228 212 }
229 213 tcsetattr((int)fd, TCSANOW, &terminos);
230 214 return 0;
231 215 }
232 216 }
233 217
234 218
235 219 int rs232setcsize(rs232port_t fd, int ChSize)
236 220 {
237 221 if ((int)fd == -1)
238 222 {
239 223 return fd;
240 224 }
241 225 else
242 226 {
243 227 struct termios terminos;
244 228 tcgetattr((int)fd, &terminos);
245 229 terminos.c_cflag &= ~CSIZE;
246 230 switch(ChSize)
247 231 {
248 232 case 5:
249 233 terminos.c_cflag |= CS5;
250 234 break;
251 235 case 6:
252 236 terminos.c_cflag |= CS6;
253 237 break;
254 238 case 7:
255 239 terminos.c_cflag |= CS7;
256 240 break;
257 241 default:
258 242 terminos.c_cflag |= CS8;
259 243 break;
260 244 }
261 245 tcsetattr((int)fd, TCSANOW, &terminos);
262 246 return 0;
263 247 }
264 248 }
265 249
266 250 rs232speed_t rs232cfspeed(unsigned int BaudeRate)
267 251 {
268 252 if(BaudeRate<25)
269 253 return B0;
270 254
271 255 if(BaudeRate<67)
272 256 return B50;
273 257
274 258 if(BaudeRate<93)
275 259 return B75;
276 260
277 261 if(BaudeRate<123)
278 262 return B110;
279 263
280 264 if(BaudeRate<142)
281 265 return B134;
282 266
283 267 if(BaudeRate<175)
284 268 return B150;
285 269
286 270 if(BaudeRate<250)
287 271 return B200;
288 272
289 273 if(BaudeRate<450)
290 274 return B300;
291 275
292 276 if(BaudeRate<900)
293 277 return B600;
294 278
295 279 if(BaudeRate<1500)
296 280 return B1200;
297 281
298 282 if(BaudeRate<2100)
299 283 return B1800;
300 284
301 285 if(BaudeRate<3600)
302 286 return B2400;
303 287
304 288 if(BaudeRate<7200)
305 289 return B4800;
306 290
307 291 if(BaudeRate<1400)
308 292 return B9600;
309 293
310 294 if(BaudeRate<28800)
311 295 return B19200;
312 296
313 297 if(BaudeRate<48000)
314 298 return B38400;
315 299
316 300 if(BaudeRate<86400)
317 301 return B57600;
318 302
319 303 if(BaudeRate<172800)
320 304 return B115200;
321 305
322 306 if(BaudeRate<345600)
323 307 return B230400;
324 308
325 309 if(BaudeRate<345600)
326 310 return B460800;
327 311
328 312 if(BaudeRate<748800)
329 313 return B576000;
330 314
331 315 if(BaudeRate<1210800)
332 316 return B921600;
333 317
334 318 if(BaudeRate<1750000)
335 319 return B1500000;
336 320
337 321 if(BaudeRate<2250000)
338 322 return B2000000;
339 323
340 324 if(BaudeRate<2750000)
341 325 return B2500000;
342 326 else
343 327 return B3000000;
344 328
345 329 }
346 330
347 331
348 332 int rs232cfparity(int fd, struct termios *terminos, rs232parity Parity)
349 333 {
350 334 if ((int)fd == -1)
351 335 {
352 336 return fd;
353 337 }
354 338 else
355 339 {
356 340 terminos->c_cflag &= ~PARENB;
357 341 terminos->c_cflag &= ~PARODD;
358 342 switch(Parity)
359 343 {
360 344 case rs232parityNo:
361 345 terminos->c_cflag &= ~PARENB;
362 346 terminos->c_cflag &= ~PARODD;
363 347 break;
364 348 case rs232parityOdd:
365 349 terminos->c_cflag |= PARENB;
366 350 terminos->c_cflag |= PARODD;
367 351 break;
368 352 case rs232parityEven:
369 353 terminos->c_cflag |= PARENB;
370 354 terminos->c_cflag &= ~PARODD;
371 355 break;
372 356 default:
373 357 terminos->c_cflag &= ~PARENB;
374 358 terminos->c_cflag &= ~PARODD;
375 359 break;
376 360 }
377 361 return 0;
378 362 }
379 363 }
380 364
381 365 int rs232cfnbstop(int fd, struct termios *terminos, rs232stop NbStop)
382 366 {
383 367 if ((int)fd == -1)
384 368 {
385 369 return fd;
386 370 }
387 371 else
388 372 {
389 373 switch(NbStop)
390 374 {
391 375 case 2:
392 376 terminos->c_cflag |= CSTOPB;
393 377 break;
394 378 default:
395 379 terminos->c_cflag &= ~CSTOPB;
396 380 break;
397 381 }
398 382 return 0;
399 383 }
400 384 }
401 385
402 386
403 387 int rs232cfcsize(int fd, struct termios *terminos, int ChSize)
404 388 {
405 389 if ((int)fd == -1)
406 390 {
407 391 return fd;
408 392 }
409 393 else
410 394 {
411 395 terminos->c_cflag &= ~CSIZE;
412 396 switch(ChSize)
413 397 {
414 398 case 5:
415 399 terminos->c_cflag |= CS5;
416 400 break;
417 401 case 6:
418 402 terminos->c_cflag |= CS6;
419 403 break;
420 404 case 7:
421 405 terminos->c_cflag |= CS7;
422 406 break;
423 407 default:
424 408 terminos->c_cflag |= CS8;
425 409 break;
426 410 }
427 411 return 0;
428 412 }
429 413 }
430 414
431 415
432 416 int rs232write(rs232port_t fd,char *psWrite, int WriteBufferSize)
433 417 {
434 418 if ((int)fd == -1)
435 419 {
436 420 return -1;
437 421 }
438 422 else
439 423 {
440 424 return write((int)fd, psWrite, WriteBufferSize);
441 425 }
442 426 }
443 427
444 428
445 429 int rs232read(rs232port_t fd,char *psReadHex, int ReadBufferSize)
446 430 {
447 431
448 432 if ((int)fd == -1)
449 433 {
450 434 return -1;
451 435 }
452 436 else
453 437 {
454 438 return read((int)fd, psReadHex, ReadBufferSize);
455 439 }
456 440
457 441 }
458 442
459 443
460 444 int rs232setRTS(rs232port_t fd)
461 445 {
462 446 int status;
463 447 ioctl((int)fd, TIOCMGET, &status);
464 448 status &= ~TIOCM_RTS;
465 449 if (ioctl((int)fd, TIOCMSET, &status))
466 450 {
467 451 return -1;
468 452 }
469 453 return 0;
470 454 }
471 455
472 456 int rs232clearRTS(rs232port_t fd)
473 457 {
474 458 int status;
475 459 ioctl((int)fd, TIOCMGET, &status);
476 460 status |= TIOCM_RTS;
477 461 if (ioctl((int)fd, TIOCMSET, &status))
478 462 {
479 463 return -1;
480 464 }
481 465 return 0;
482 466 }
483 467
484 468 int rs232setDTR(rs232port_t fd)
485 469 {
486 470 int status;
487 471 ioctl((int)fd, TIOCMGET, &status);
488 472 status &= ~TIOCM_DTR;
489 473 if (ioctl((int)fd, TIOCMSET, &status))
490 474 {
491 475 return -1;
492 476 }
493 477 return 0;
494 478 }
495 479
496 480
497 481 int rs232clearDTR(rs232port_t fd)
498 482 {
499 483 int status;
500 484 ioctl((int)fd, TIOCMGET, &status);
501 485 status |= TIOCM_DTR;
502 486 if (ioctl((int)fd, TIOCMSET, &status))
503 487 {
504 488 return -1;
505 489 }
506 490 return 0;
507 491 }
508 492
509 493
510 494
511 495 int rs232saferead(rs232port_t fd,char* data,int count )
512 496 {
513 497 int read=0;
514 498 int i=0;
515 499 for(i=0;i<1000;i++)
516 500 {
517 501 read = rs232read((int)fd,data,count);
518 502 //printf("read %d bytes\n",read);
519 503 if(read==-1)read=0;
520 504 count-=read;
521 505 data+=read;
522 506 if(count==0)
523 507 return 0;
524 508 usleep(10);
525 509 }
526 510 return -1;
527 511 }
528 512
529 513
530 514
531 515 int rs232safewrite(rs232port_t fd,char* data,int count)
532 516 {
533 517 int written=0;
534 518 int i=0;
535 519 for(i=0;i<1000;i++)
536 520 {
537 521 written = rs232write((int)fd,data+written,count);
538 522 //printf("%d bytes written\n",written);
539 523 if(written==-1)written=0;
540 524 count-=written;
541 525 data+=written;
542 526 if(count==0)
543 527 return 0;
544 528 }
545 529 return -1;
546 530 }
547 531
548 532
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