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Commit | Line | Data |
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a1bb33af | 1 | /* |
50985c20 | 2 | * This file is part of the libsigrok project. |
a1bb33af | 3 | * |
c73d2ea4 | 4 | * Copyright (C) 2010-2012 Bert Vermeulen <bert@biot.com> |
b19f4622 | 5 | * Copyright (C) 2010-2012 Uwe Hermann <uwe@hermann-uwe.de> |
766456be | 6 | * Copyright (C) 2012 Alexandru Gagniuc <mr.nuke.me@gmail.com> |
a1bb33af UH |
7 | * |
8 | * This program is free software: you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation, either version 3 of the License, or | |
11 | * (at your option) any later version. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License | |
19 | * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
20 | */ | |
21 | ||
54b38f64 | 22 | #include <string.h> |
d02a535e BV |
23 | #include <sys/types.h> |
24 | #include <sys/stat.h> | |
25 | #include <fcntl.h> | |
26 | #include <unistd.h> | |
926b866c | 27 | #ifdef _WIN32 |
a9f54bcd | 28 | #include <windows.h> |
926b866c | 29 | #else |
d02a535e | 30 | #include <termios.h> |
0f84cda0 | 31 | #include <sys/ioctl.h> |
926b866c | 32 | #endif |
d02a535e | 33 | #include <stdlib.h> |
b19f4622 | 34 | #include <errno.h> |
a1bb33af | 35 | #include <glib.h> |
45c59c8b BV |
36 | #include "libsigrok.h" |
37 | #include "libsigrok-internal.h" | |
a1bb33af | 38 | |
29a27196 UH |
39 | /* Message logging helpers with subsystem-specific prefix string. */ |
40 | #define LOG_PREFIX "serial: " | |
41 | #define sr_log(l, s, args...) sr_log(l, LOG_PREFIX s, ## args) | |
42 | #define sr_spew(s, args...) sr_spew(LOG_PREFIX s, ## args) | |
43 | #define sr_dbg(s, args...) sr_dbg(LOG_PREFIX s, ## args) | |
44 | #define sr_info(s, args...) sr_info(LOG_PREFIX s, ## args) | |
45 | #define sr_warn(s, args...) sr_warn(LOG_PREFIX s, ## args) | |
46 | #define sr_err(s, args...) sr_err(LOG_PREFIX s, ## args) | |
b19f4622 | 47 | |
926b866c UH |
48 | // FIXME: Must be moved, or rather passed as function argument. |
49 | #ifdef _WIN32 | |
a0ecd83b | 50 | static HANDLE hdl; |
926b866c UH |
51 | #endif |
52 | ||
b19f4622 UH |
53 | /** |
54 | * Open the specified serial port. | |
55 | * | |
299bdb24 | 56 | * @param serial Previously initialized serial port structure. |
a54dd31e UH |
57 | * @param flags Flags to use when opening the serial port. Possible flags |
58 | * include SERIAL_RDWR, SERIAL_RDONLY, SERIAL_NONBLOCK. | |
b19f4622 | 59 | * |
299bdb24 BV |
60 | * If the serial structure contains a serialcomm string, it will be |
61 | * passed to serial_set_paramstr() after the port is opened. | |
62 | * | |
63 | * @return SR_OK on success, SR_ERR on failure. | |
b19f4622 | 64 | */ |
299bdb24 | 65 | SR_PRIV int serial_open(struct sr_serial_dev_inst *serial, int flags) |
d02a535e | 66 | { |
a54dd31e UH |
67 | int flags_local = 0; |
68 | #ifdef _WIN32 | |
69 | DWORD desired_access = 0, flags_and_attributes = 0; | |
70 | #endif | |
b19f4622 | 71 | |
299bdb24 BV |
72 | if (!serial) { |
73 | sr_dbg("Invalid serial port."); | |
74 | return SR_ERR; | |
75 | } | |
76 | ||
77 | sr_spew("Opening serial port '%s' (flags %d).", serial->port, flags); | |
b19f4622 | 78 | |
926b866c | 79 | #ifdef _WIN32 |
a54dd31e UH |
80 | /* Map 'flags' to the OS-specific settings. */ |
81 | desired_access |= GENERIC_READ; | |
82 | flags_and_attributes = FILE_ATTRIBUTE_NORMAL; | |
83 | if (flags & SERIAL_RDWR) | |
84 | desired_access |= GENERIC_WRITE; | |
85 | if (flags & SERIAL_NONBLOCK) | |
86 | flags_and_attributes |= FILE_FLAG_OVERLAPPED; | |
87 | ||
88 | hdl = CreateFile(serial->port, desired_access, 0, 0, | |
89 | OPEN_EXISTING, flags_and_attributes, 0); | |
926b866c | 90 | if (hdl == INVALID_HANDLE_VALUE) { |
299bdb24 BV |
91 | sr_err("Error opening serial port '%s'.", serial->port); |
92 | return SR_ERR; | |
926b866c | 93 | } |
926b866c | 94 | #else |
a54dd31e UH |
95 | /* Map 'flags' to the OS-specific settings. */ |
96 | if (flags & SERIAL_RDWR) | |
97 | flags_local |= O_RDWR; | |
98 | if (flags & SERIAL_RDONLY) | |
99 | flags_local |= O_RDONLY; | |
100 | if (flags & SERIAL_NONBLOCK) | |
101 | flags_local |= O_NONBLOCK; | |
102 | ||
103 | if ((serial->fd = open(serial->port, flags_local)) < 0) { | |
299bdb24 | 104 | sr_err("Error opening serial port '%s': %s.", serial->port, |
b19f4622 | 105 | strerror(errno)); |
299bdb24 | 106 | return SR_ERR; |
a54dd31e UH |
107 | } |
108 | ||
109 | sr_spew("Opened serial port '%s' (fd %d).", serial->port, serial->fd); | |
926b866c | 110 | #endif |
299bdb24 BV |
111 | |
112 | if (serial->serialcomm) | |
113 | return serial_set_paramstr(serial, serial->serialcomm); | |
114 | else | |
115 | return SR_OK; | |
d02a535e BV |
116 | } |
117 | ||
b19f4622 UH |
118 | /** |
119 | * Close the specified serial port. | |
120 | * | |
299bdb24 | 121 | * @param serial Previously initialized serial port structure. |
b19f4622 | 122 | * |
299bdb24 | 123 | * @return SR_OK on success, SR_ERR on failure. |
2119ab03 | 124 | */ |
299bdb24 | 125 | SR_PRIV int serial_close(struct sr_serial_dev_inst *serial) |
d02a535e | 126 | { |
299bdb24 BV |
127 | int ret; |
128 | ||
129 | if (!serial) { | |
130 | sr_dbg("Invalid serial port."); | |
131 | return SR_ERR; | |
132 | } | |
133 | ||
134 | if (serial->fd == -1) { | |
135 | sr_dbg("Cannot close unopened serial port %s (fd %d).", | |
136 | serial->port, serial->fd); | |
137 | return SR_ERR; | |
138 | } | |
139 | ||
140 | sr_spew("Closing serial port %s (fd %d).", serial->port, serial->fd); | |
141 | ret = SR_OK; | |
b19f4622 | 142 | |
926b866c | 143 | #ifdef _WIN32 |
2119ab03 | 144 | /* Returns non-zero upon success, 0 upon failure. */ |
299bdb24 BV |
145 | if (CloseHandle(hdl) == 0) |
146 | ret = SR_ERR; | |
926b866c | 147 | #else |
2119ab03 | 148 | /* Returns 0 upon success, -1 upon failure. */ |
299bdb24 BV |
149 | if (close(serial->fd) < 0) { |
150 | sr_err("Error closing serial port: %s (fd %d).", strerror(errno), | |
151 | serial->fd); | |
152 | ret = SR_ERR; | |
b19f4622 | 153 | } |
299bdb24 BV |
154 | #endif |
155 | ||
156 | serial->fd = -1; | |
b19f4622 UH |
157 | |
158 | return ret; | |
d02a535e BV |
159 | } |
160 | ||
b19f4622 | 161 | /** |
299bdb24 | 162 | * Flush serial port buffers. |
b19f4622 | 163 | * |
299bdb24 | 164 | * @param serial Previously initialized serial port structure. |
b19f4622 | 165 | * |
299bdb24 | 166 | * @return SR_OK on success, SR_ERR on failure. |
1fdb75e1 | 167 | */ |
299bdb24 | 168 | SR_PRIV int serial_flush(struct sr_serial_dev_inst *serial) |
06d64eb8 | 169 | { |
299bdb24 BV |
170 | int ret; |
171 | ||
172 | if (!serial) { | |
173 | sr_dbg("Invalid serial port."); | |
174 | return SR_ERR; | |
175 | } | |
176 | ||
177 | if (serial->fd == -1) { | |
178 | sr_dbg("Cannot flush unopened serial port %s (fd %d).", | |
179 | serial->port, serial->fd); | |
180 | return SR_ERR; | |
181 | } | |
182 | ||
183 | sr_spew("Flushing serial port %s (fd %d).", serial->port, serial->fd); | |
184 | ret = SR_OK; | |
b19f4622 | 185 | |
1fdb75e1 UH |
186 | #ifdef _WIN32 |
187 | /* Returns non-zero upon success, 0 upon failure. */ | |
4da1a800 | 188 | if (PurgeComm(hdl, PURGE_RXCLEAR | PURGE_TXCLEAR) == 0) { |
299bdb24 BV |
189 | sr_err("Error flushing serial port: %s.", strerror(errno)); |
190 | ret = SR_ERR; | |
191 | } | |
1fdb75e1 UH |
192 | #else |
193 | /* Returns 0 upon success, -1 upon failure. */ | |
299bdb24 | 194 | if (tcflush(serial->fd, TCIOFLUSH) < 0) { |
b19f4622 | 195 | sr_err("Error flushing serial port: %s.", strerror(errno)); |
299bdb24 BV |
196 | ret = SR_ERR; |
197 | } | |
b19f4622 UH |
198 | |
199 | return ret; | |
1fdb75e1 | 200 | #endif |
06d64eb8 BV |
201 | } |
202 | ||
b19f4622 | 203 | /** |
2119ab03 | 204 | * Write a number of bytes to the specified serial port. |
b19f4622 | 205 | * |
299bdb24 | 206 | * @param serial Previously initialized serial port structure. |
b19f4622 UH |
207 | * @param buf Buffer containing the bytes to write. |
208 | * @param count Number of bytes to write. | |
209 | * | |
210 | * @return The number of bytes written, or -1 upon failure. | |
2119ab03 | 211 | */ |
299bdb24 BV |
212 | SR_PRIV int serial_write(struct sr_serial_dev_inst *serial, |
213 | const void *buf, size_t count) | |
2119ab03 | 214 | { |
299bdb24 BV |
215 | ssize_t ret; |
216 | ||
217 | if (!serial) { | |
218 | sr_dbg("Invalid serial port."); | |
219 | return -1; | |
220 | } | |
221 | ||
222 | if (serial->fd == -1) { | |
223 | sr_dbg("Cannot use unopened serial port %s (fd %d).", | |
224 | serial->port, serial->fd); | |
225 | return -1; | |
226 | } | |
227 | ||
2119ab03 UH |
228 | #ifdef _WIN32 |
229 | DWORD tmp = 0; | |
230 | ||
231 | /* FIXME */ | |
232 | /* Returns non-zero upon success, 0 upon failure. */ | |
233 | WriteFile(hdl, buf, count, &tmp, NULL); | |
234 | #else | |
235 | /* Returns the number of bytes written, or -1 upon failure. */ | |
299bdb24 | 236 | ret = write(serial->fd, buf, count); |
b19f4622 | 237 | if (ret < 0) |
299bdb24 | 238 | sr_err("Write error: %s.", strerror(errno)); |
302c4b5a | 239 | else |
299bdb24 BV |
240 | sr_spew("Wrote %d/%d bytes (fd %d).", ret, count, serial->fd); |
241 | #endif | |
b19f4622 UH |
242 | |
243 | return ret; | |
2119ab03 UH |
244 | } |
245 | ||
b19f4622 | 246 | /** |
2119ab03 | 247 | * Read a number of bytes from the specified serial port. |
b19f4622 | 248 | * |
299bdb24 | 249 | * @param serial Previously initialized serial port structure. |
b19f4622 UH |
250 | * @param buf Buffer where to store the bytes that are read. |
251 | * @param count The number of bytes to read. | |
252 | * | |
253 | * @return The number of bytes read, or -1 upon failure. | |
2119ab03 | 254 | */ |
299bdb24 BV |
255 | SR_PRIV int serial_read(struct sr_serial_dev_inst *serial, void *buf, |
256 | size_t count) | |
2119ab03 | 257 | { |
299bdb24 BV |
258 | ssize_t ret; |
259 | ||
260 | if (!serial) { | |
261 | sr_dbg("Invalid serial port."); | |
262 | return -1; | |
263 | } | |
264 | ||
265 | if (serial->fd == -1) { | |
266 | sr_dbg("Cannot use unopened serial port %s (fd %d).", | |
267 | serial->port, serial->fd); | |
268 | return -1; | |
269 | } | |
270 | ||
2119ab03 UH |
271 | #ifdef _WIN32 |
272 | DWORD tmp = 0; | |
273 | ||
274 | /* FIXME */ | |
275 | /* Returns non-zero upon success, 0 upon failure. */ | |
276 | return ReadFile(hdl, buf, count, &tmp, NULL); | |
277 | #else | |
278 | /* Returns the number of bytes read, or -1 upon failure. */ | |
299bdb24 | 279 | ret = read(serial->fd, buf, count); |
299bdb24 | 280 | #endif |
b19f4622 UH |
281 | |
282 | return ret; | |
2119ab03 UH |
283 | } |
284 | ||
b19f4622 UH |
285 | /** |
286 | * Set serial parameters for the specified serial port. | |
287 | * | |
299bdb24 | 288 | * @param serial Previously initialized serial port structure. |
b19f4622 UH |
289 | * @param baudrate The baudrate to set. |
290 | * @param bits The number of data bits to use. | |
291 | * @param parity The parity setting to use (0 = none, 1 = even, 2 = odd). | |
292 | * @param stopbits The number of stop bits to use (1 or 2). | |
293 | * @param flowcontrol The flow control settings to use (0 = none, 1 = RTS/CTS, | |
294 | * 2 = XON/XOFF). | |
2119ab03 | 295 | * |
b19f4622 | 296 | * @return SR_OK upon success, SR_ERR upon failure. |
1ff7712c | 297 | */ |
299bdb24 | 298 | SR_PRIV int serial_set_params(struct sr_serial_dev_inst *serial, int baudrate, |
39e5d798 UH |
299 | int bits, int parity, int stopbits, |
300 | int flowcontrol, int rts, int dtr) | |
d02a535e | 301 | { |
299bdb24 BV |
302 | if (!serial) { |
303 | sr_dbg("Invalid serial port."); | |
304 | return SR_ERR; | |
305 | } | |
306 | ||
307 | if (serial->fd == -1) { | |
308 | sr_dbg("Cannot configure unopened serial port %s (fd %d).", | |
39e5d798 | 309 | serial->port, serial->fd); |
299bdb24 BV |
310 | return SR_ERR; |
311 | } | |
312 | ||
313 | sr_spew("Setting serial parameters on port %s (fd %d).", serial->port, | |
39e5d798 | 314 | serial->fd); |
b19f4622 | 315 | |
926b866c UH |
316 | #ifdef _WIN32 |
317 | DCB dcb; | |
318 | ||
5ddb0cc7 UH |
319 | if (!GetCommState(hdl, &dcb)) { |
320 | sr_err("Failed to get comm state on port %s (fd %d): %d.", | |
321 | serial->port, serial->fd, GetLastError()); | |
e46b8fb1 | 322 | return SR_ERR; |
5ddb0cc7 | 323 | } |
926b866c | 324 | |
0abee507 | 325 | switch (baudrate) { |
5ae35c29 UH |
326 | /* |
327 | * The baudrates 50/75/134/150/200/1800/230400/460800 do not seem to | |
328 | * have documented CBR_* macros. | |
329 | */ | |
330 | case 110: | |
331 | dcb.BaudRate = CBR_110; | |
926b866c | 332 | break; |
5ae35c29 UH |
333 | case 300: |
334 | dcb.BaudRate = CBR_300; | |
926b866c | 335 | break; |
5ae35c29 UH |
336 | case 600: |
337 | dcb.BaudRate = CBR_600; | |
926b866c | 338 | break; |
5ae35c29 UH |
339 | case 1200: |
340 | dcb.BaudRate = CBR_1200; | |
926b866c | 341 | break; |
5ae35c29 UH |
342 | case 2400: |
343 | dcb.BaudRate = CBR_2400; | |
926b866c | 344 | break; |
e8e9dcdd AG |
345 | case 4800: |
346 | dcb.BaudRate = CBR_4800; | |
347 | break; | |
5ae35c29 UH |
348 | case 9600: |
349 | dcb.BaudRate = CBR_9600; | |
350 | break; | |
351 | case 14400: | |
352 | dcb.BaudRate = CBR_14400; /* Not available on Unix? */ | |
353 | break; | |
354 | case 19200: | |
355 | dcb.BaudRate = CBR_19200; | |
356 | break; | |
357 | case 38400: | |
358 | dcb.BaudRate = CBR_38400; | |
359 | break; | |
360 | case 57600: | |
361 | dcb.BaudRate = CBR_57600; | |
362 | break; | |
363 | case 115200: | |
364 | dcb.BaudRate = CBR_115200; | |
365 | break; | |
366 | case 128000: | |
367 | dcb.BaudRate = CBR_128000; /* Not available on Unix? */ | |
368 | break; | |
369 | case 256000: | |
370 | dcb.BaudRate = CBR_256000; /* Not available on Unix? */ | |
0f708301 | 371 | break; |
926b866c | 372 | default: |
5ae35c29 | 373 | sr_err("Unsupported baudrate: %d.", baudrate); |
b19f4622 | 374 | return SR_ERR; |
926b866c | 375 | } |
5ae35c29 UH |
376 | sr_spew("Configuring baudrate to %d (%d).", baudrate, dcb.BaudRate); |
377 | ||
5ddb0cc7 | 378 | sr_spew("Configuring %d data bits.", bits); |
926b866c | 379 | dcb.ByteSize = bits; |
5ddb0cc7 UH |
380 | |
381 | sr_spew("Configuring %d stop bits.", stopbits); | |
382 | switch (stopbits) { | |
383 | /* Note: There's also ONE5STOPBITS == 1.5 (unneeded so far). */ | |
384 | case 1: | |
385 | dcb.StopBits = ONESTOPBIT; | |
386 | break; | |
387 | case 2: | |
388 | dcb.StopBits = TWOSTOPBITS; | |
389 | break; | |
390 | default: | |
391 | sr_err("Unsupported stopbits number: %d.", stopbits); | |
392 | return SR_ERR; | |
393 | } | |
394 | ||
395 | switch (parity) { | |
396 | /* Note: There's also SPACEPARITY, MARKPARITY (unneeded so far). */ | |
397 | case SERIAL_PARITY_NONE: | |
398 | sr_spew("Configuring no parity."); | |
399 | dcb.Parity = NOPARITY; | |
400 | break; | |
401 | case SERIAL_PARITY_EVEN: | |
402 | sr_spew("Configuring even parity."); | |
403 | dcb.Parity = EVENPARITY; | |
404 | break; | |
405 | case SERIAL_PARITY_ODD: | |
406 | sr_spew("Configuring odd parity."); | |
407 | dcb.Parity = ODDPARITY; | |
408 | break; | |
409 | default: | |
410 | sr_err("Unsupported parity setting: %d.", parity); | |
411 | return SR_ERR; | |
412 | } | |
926b866c | 413 | |
39e5d798 UH |
414 | if (rts != -1) { |
415 | sr_spew("Setting RTS %s.", rts ? "high" : "low"); | |
416 | if (rts) | |
417 | dcb.fRtsControl = RTS_CONTROL_ENABLE; | |
418 | else | |
419 | dcb.fRtsControl = RTS_CONTROL_DISABLE; | |
420 | } | |
421 | ||
422 | if (dtr != -1) { | |
423 | sr_spew("Setting DTR %s.", dtr ? "high" : "low"); | |
86c02e65 | 424 | if (dtr) |
39e5d798 UH |
425 | dcb.fDtrControl = DTR_CONTROL_ENABLE; |
426 | else | |
427 | dcb.fDtrControl = DTR_CONTROL_DISABLE; | |
428 | } | |
429 | ||
5ddb0cc7 UH |
430 | if (!SetCommState(hdl, &dcb)) { |
431 | sr_err("Failed to set comm state on port %s (fd %d): %d.", | |
432 | serial->port, serial->fd, GetLastError()); | |
e46b8fb1 | 433 | return SR_ERR; |
5ddb0cc7 | 434 | } |
926b866c | 435 | #else |
d02a535e | 436 | struct termios term; |
1ff7712c | 437 | speed_t baud; |
700dcd5c | 438 | int ret, controlbits; |
d02a535e | 439 | |
299bdb24 BV |
440 | if (tcgetattr(serial->fd, &term) < 0) { |
441 | sr_err("tcgetattr() error on port %s (fd %d): %s.", | |
442 | serial->port, serial->fd, strerror(errno)); | |
6a6e23ab | 443 | return SR_ERR; |
b19f4622 | 444 | } |
6a6e23ab | 445 | |
0abee507 | 446 | switch (baudrate) { |
b19f4622 UH |
447 | case 50: |
448 | baud = B50; | |
449 | break; | |
450 | case 75: | |
451 | baud = B75; | |
452 | break; | |
453 | case 110: | |
454 | baud = B110; | |
455 | break; | |
456 | case 134: | |
457 | baud = B134; | |
458 | break; | |
459 | case 150: | |
460 | baud = B150; | |
461 | break; | |
462 | case 200: | |
463 | baud = B200; | |
464 | break; | |
465 | case 300: | |
466 | baud = B300; | |
467 | break; | |
468 | case 600: | |
469 | baud = B600; | |
470 | break; | |
471 | case 1200: | |
472 | baud = B1200; | |
473 | break; | |
474 | case 1800: | |
475 | baud = B1800; | |
476 | break; | |
0f708301 AG |
477 | case 2400: |
478 | baud = B2400; | |
479 | break; | |
e8e9dcdd AG |
480 | case 4800: |
481 | baud = B4800; | |
482 | break; | |
1ff7712c DR |
483 | case 9600: |
484 | baud = B9600; | |
485 | break; | |
b19f4622 UH |
486 | case 19200: |
487 | baud = B19200; | |
488 | break; | |
1ff7712c DR |
489 | case 38400: |
490 | baud = B38400; | |
491 | break; | |
492 | case 57600: | |
493 | baud = B57600; | |
494 | break; | |
495 | case 115200: | |
496 | baud = B115200; | |
497 | break; | |
b19f4622 UH |
498 | case 230400: |
499 | baud = B230400; | |
500 | break; | |
b97cbca6 | 501 | #if !defined(__APPLE__) && !defined(__OpenBSD__) |
1ff7712c DR |
502 | case 460800: |
503 | baud = B460800; | |
504 | break; | |
9a751023 | 505 | #endif |
1ff7712c | 506 | default: |
5ae35c29 | 507 | sr_err("Unsupported baudrate: %d.", baudrate); |
e46b8fb1 | 508 | return SR_ERR; |
1ff7712c | 509 | } |
b19f4622 | 510 | |
299bdb24 | 511 | sr_spew("Configuring output baudrate to %d (%d).", baudrate, baud); |
b19f4622 | 512 | if (cfsetospeed(&term, baud) < 0) { |
5df7b201 | 513 | sr_err("cfsetospeed() error: %s.", strerror(errno)); |
e46b8fb1 | 514 | return SR_ERR; |
b19f4622 UH |
515 | } |
516 | ||
299bdb24 | 517 | sr_spew("Configuring input baudrate to %d (%d).", baudrate, baud); |
b19f4622 | 518 | if (cfsetispeed(&term, baud) < 0) { |
5df7b201 | 519 | sr_err("cfsetispeed() error: %s.", strerror(errno)); |
e46b8fb1 | 520 | return SR_ERR; |
b19f4622 | 521 | } |
1ff7712c | 522 | |
299bdb24 | 523 | sr_spew("Configuring %d data bits.", bits); |
d02a535e | 524 | term.c_cflag &= ~CSIZE; |
1ff7712c DR |
525 | switch (bits) { |
526 | case 8: | |
527 | term.c_cflag |= CS8; | |
528 | break; | |
529 | case 7: | |
530 | term.c_cflag |= CS7; | |
531 | break; | |
532 | default: | |
299bdb24 | 533 | sr_err("Unsupported data bits number %d.", bits); |
e46b8fb1 | 534 | return SR_ERR; |
1ff7712c DR |
535 | } |
536 | ||
299bdb24 | 537 | sr_spew("Configuring %d stop bits.", stopbits); |
d02a535e | 538 | term.c_cflag &= ~CSTOPB; |
1ff7712c DR |
539 | switch (stopbits) { |
540 | case 1: | |
299bdb24 | 541 | term.c_cflag &= ~CSTOPB; |
1ff7712c DR |
542 | break; |
543 | case 2: | |
544 | term.c_cflag |= CSTOPB; | |
d7c776b9 | 545 | break; |
1ff7712c | 546 | default: |
299bdb24 | 547 | sr_err("Unsupported stopbits number %d.", stopbits); |
e46b8fb1 | 548 | return SR_ERR; |
1ff7712c DR |
549 | } |
550 | ||
1b943b6d | 551 | term.c_iflag &= ~(IXON | IXOFF | IXANY); |
f38b9763 | 552 | term.c_cflag &= ~CRTSCTS; |
1ff7712c | 553 | switch (flowcontrol) { |
f38b9763 BV |
554 | case 0: |
555 | /* No flow control. */ | |
299bdb24 | 556 | sr_spew("Configuring no flow control."); |
1ff7712c DR |
557 | break; |
558 | case 1: | |
299bdb24 | 559 | sr_spew("Configuring RTS/CTS flow control."); |
1ff7712c | 560 | term.c_cflag |= CRTSCTS; |
d7c776b9 | 561 | break; |
f38b9763 | 562 | case 2: |
299bdb24 | 563 | sr_spew("Configuring XON/XOFF flow control."); |
1b943b6d | 564 | term.c_iflag |= (IXON | IXOFF | IXANY); |
f38b9763 | 565 | break; |
1ff7712c | 566 | default: |
299bdb24 | 567 | sr_err("Unsupported flow control setting %d.", flowcontrol); |
e46b8fb1 | 568 | return SR_ERR; |
1ff7712c DR |
569 | } |
570 | ||
ac4a2ea4 | 571 | term.c_iflag &= ~IGNPAR; |
b21d7eeb | 572 | term.c_cflag &= ~(PARENB | PARODD); |
1ff7712c | 573 | switch (parity) { |
f8c1fcda | 574 | case SERIAL_PARITY_NONE: |
299bdb24 | 575 | sr_spew("Configuring no parity."); |
1ff7712c DR |
576 | term.c_iflag |= IGNPAR; |
577 | break; | |
f8c1fcda | 578 | case SERIAL_PARITY_EVEN: |
299bdb24 | 579 | sr_spew("Configuring even parity."); |
ac4a2ea4 | 580 | term.c_cflag |= PARENB; |
1ff7712c | 581 | break; |
f8c1fcda | 582 | case SERIAL_PARITY_ODD: |
299bdb24 | 583 | sr_spew("Configuring odd parity."); |
ac4a2ea4 | 584 | term.c_cflag |= PARENB | PARODD; |
1ff7712c DR |
585 | break; |
586 | default: | |
299bdb24 | 587 | sr_err("Unsupported parity setting %d.", parity); |
e46b8fb1 | 588 | return SR_ERR; |
1ff7712c DR |
589 | } |
590 | ||
b1a05154 BV |
591 | /* Turn off all serial port cooking. */ |
592 | term.c_iflag &= ~(ISTRIP | INLCR | ICRNL); | |
50a9aba2 | 593 | term.c_oflag &= ~(OPOST | ONLCR | OCRNL | ONOCR); |
cc840ab6 | 594 | #if !defined(__FreeBSD__) && !defined(__OpenBSD__) && !defined(__NetBSD__) |
7d4abe5a UH |
595 | term.c_oflag &= ~OFILL; |
596 | #endif | |
b19f4622 UH |
597 | |
598 | /* Disable canonical mode, and don't echo input characters. */ | |
5c51e098 BV |
599 | term.c_lflag &= ~(ICANON | ECHO); |
600 | ||
a510d555 MH |
601 | /* Ignore modem status lines; enable receiver */ |
602 | term.c_cflag |= (CLOCAL | CREAD); | |
603 | ||
b19f4622 | 604 | /* Write the configured settings. */ |
299bdb24 BV |
605 | if (tcsetattr(serial->fd, TCSADRAIN, &term) < 0) { |
606 | sr_err("tcsetattr() error: %s.", strerror(errno)); | |
e46b8fb1 | 607 | return SR_ERR; |
b19f4622 | 608 | } |
700dcd5c | 609 | |
71caaad4 BV |
610 | if (rts != -1) { |
611 | sr_spew("Setting RTS %s.", rts ? "high" : "low"); | |
612 | controlbits = TIOCM_RTS; | |
613 | if ((ret = ioctl(serial->fd, rts ? TIOCMBIS : TIOCMBIC, | |
614 | &controlbits)) < 0) { | |
615 | sr_err("Error setting RTS: %s.", strerror(errno)); | |
616 | return SR_ERR; | |
617 | } | |
700dcd5c UH |
618 | } |
619 | ||
71caaad4 BV |
620 | if (dtr != -1) { |
621 | sr_spew("Setting DTR %s.", dtr ? "high" : "low"); | |
622 | controlbits = TIOCM_DTR; | |
623 | if ((ret = ioctl(serial->fd, dtr ? TIOCMBIS : TIOCMBIC, | |
624 | &controlbits)) < 0) { | |
625 | sr_err("Error setting DTR: %s.", strerror(errno)); | |
626 | return SR_ERR; | |
627 | } | |
700dcd5c | 628 | } |
700dcd5c | 629 | |
926b866c | 630 | #endif |
d02a535e | 631 | |
e46b8fb1 | 632 | return SR_OK; |
d02a535e | 633 | } |
792fc686 | 634 | |
299bdb24 BV |
635 | /** |
636 | * Set serial parameters for the specified serial port. | |
637 | * | |
638 | * @param serial Previously initialized serial port structure. | |
639 | * @param paramstr A serial communication parameters string, in the form | |
26ddb5ba | 640 | * of <speed>/<data bits><parity><stopbits><flow>, for example "9600/8n1" or |
641 | * "600/7o2" or "460800/8n1/flow=2" where flow is 0 for none, 1 for rts/cts and 2 for xon/xoff. | |
299bdb24 BV |
642 | * |
643 | * @return SR_OK upon success, SR_ERR upon failure. | |
644 | */ | |
71caaad4 | 645 | #define SERIAL_COMM_SPEC "^(\\d+)/([78])([neo])([12])(.*)$" |
299bdb24 BV |
646 | SR_PRIV int serial_set_paramstr(struct sr_serial_dev_inst *serial, |
647 | const char *paramstr) | |
792fc686 BV |
648 | { |
649 | GRegex *reg; | |
650 | GMatchInfo *match; | |
26ddb5ba | 651 | int speed, databits, parity, stopbits, flow, rts, dtr, i; |
71caaad4 | 652 | char *mstr, **opts, **kv; |
792fc686 | 653 | |
26ddb5ba | 654 | speed = databits = parity = stopbits = flow = 0; |
71caaad4 | 655 | rts = dtr = -1; |
ea088bb6 | 656 | sr_spew("Parsing parameters from \"%s\".", paramstr); |
792fc686 BV |
657 | reg = g_regex_new(SERIAL_COMM_SPEC, 0, 0, NULL); |
658 | if (g_regex_match(reg, paramstr, 0, &match)) { | |
659 | if ((mstr = g_match_info_fetch(match, 1))) | |
660 | speed = strtoul(mstr, NULL, 10); | |
661 | g_free(mstr); | |
662 | if ((mstr = g_match_info_fetch(match, 2))) | |
663 | databits = strtoul(mstr, NULL, 10); | |
664 | g_free(mstr); | |
665 | if ((mstr = g_match_info_fetch(match, 3))) { | |
666 | switch (mstr[0]) { | |
667 | case 'n': | |
668 | parity = SERIAL_PARITY_NONE; | |
669 | break; | |
670 | case 'e': | |
671 | parity = SERIAL_PARITY_EVEN; | |
672 | break; | |
673 | case 'o': | |
674 | parity = SERIAL_PARITY_ODD; | |
675 | break; | |
676 | } | |
677 | } | |
678 | g_free(mstr); | |
679 | if ((mstr = g_match_info_fetch(match, 4))) | |
680 | stopbits = strtoul(mstr, NULL, 10); | |
681 | g_free(mstr); | |
71caaad4 BV |
682 | if ((mstr = g_match_info_fetch(match, 5)) && mstr[0] != '\0') { |
683 | if (mstr[0] != '/') { | |
684 | sr_dbg("missing separator before extra options"); | |
685 | speed = 0; | |
686 | } else { | |
687 | /* A set of "key=value" options separated by / */ | |
688 | opts = g_strsplit(mstr + 1, "/", 0); | |
689 | for (i = 0; opts[i]; i++) { | |
690 | kv = g_strsplit(opts[i], "=", 2); | |
691 | if (!strncmp(kv[0], "rts", 3)) { | |
692 | if (kv[1][0] == '1') | |
693 | rts = 1; | |
694 | else if (kv[1][0] == '0') | |
695 | rts = 0; | |
696 | else { | |
697 | sr_dbg("invalid value for rts: %c", kv[1][0]); | |
698 | speed = 0; | |
699 | } | |
700 | } else if (!strncmp(kv[0], "dtr", 3)) { | |
701 | if (kv[1][0] == '1') | |
702 | dtr = 1; | |
703 | else if (kv[1][0] == '0') | |
704 | dtr = 0; | |
705 | else { | |
706 | sr_dbg("invalid value for dtr: %c", kv[1][0]); | |
707 | speed = 0; | |
708 | } | |
26ddb5ba | 709 | } else if (!strncmp(kv[0], "flow", 4)) { |
710 | if (kv[1][0] == '0') | |
711 | flow = 0; | |
712 | else if (kv[1][0] == '1') | |
713 | flow = 1; | |
714 | else if (kv[1][0] == '2') | |
715 | flow = 2; | |
716 | else { | |
717 | sr_dbg("invalid value for flow: %c", kv[1][0]); | |
718 | speed = 0; | |
719 | } | |
71caaad4 BV |
720 | } |
721 | g_strfreev(kv); | |
722 | } | |
723 | g_strfreev(opts); | |
724 | } | |
725 | } | |
726 | g_free(mstr); | |
792fc686 BV |
727 | } |
728 | g_match_info_unref(match); | |
729 | g_regex_unref(reg); | |
730 | ||
ea088bb6 AG |
731 | if (speed) { |
732 | return serial_set_params(serial, speed, databits, parity, | |
26ddb5ba | 733 | stopbits, flow, rts, dtr); |
ea088bb6 AG |
734 | } else { |
735 | sr_dbg("Could not infer speed from parameter string."); | |
792fc686 | 736 | return SR_ERR_ARG; |
ea088bb6 | 737 | } |
792fc686 BV |
738 | } |
739 | ||
299bdb24 BV |
740 | /** |
741 | * Read a line from the specified serial port. | |
742 | * | |
743 | * @param serial Previously initialized serial port structure. | |
744 | * @param buf Buffer where to store the bytes that are read. | |
745 | * @param buflen Size of the buffer. | |
746 | * @param timeout_ms How long to wait for a line to come in. | |
747 | * | |
748 | * Reading stops when CR of LR is found, which is stripped from the buffer. | |
749 | * | |
750 | * @return SR_OK on success, SR_ERR on failure. | |
751 | */ | |
752 | SR_PRIV int serial_readline(struct sr_serial_dev_inst *serial, char **buf, | |
753 | int *buflen, gint64 timeout_ms) | |
6f22a8ef | 754 | { |
b87f8504 | 755 | gint64 start; |
6f22a8ef UH |
756 | int maxlen, len; |
757 | ||
299bdb24 BV |
758 | if (!serial || serial->fd == -1) { |
759 | sr_dbg("Invalid serial port."); | |
760 | return SR_ERR; | |
761 | } | |
762 | ||
763 | if (serial->fd == -1) { | |
764 | sr_dbg("Cannot use unopened serial port %s (fd %d).", | |
765 | serial->port, serial->fd); | |
766 | return -1; | |
767 | } | |
768 | ||
6f22a8ef UH |
769 | timeout_ms *= 1000; |
770 | start = g_get_monotonic_time(); | |
771 | ||
772 | maxlen = *buflen; | |
773 | *buflen = len = 0; | |
774 | while(1) { | |
775 | len = maxlen - *buflen - 1; | |
776 | if (len < 1) | |
777 | break; | |
299bdb24 | 778 | len = serial_read(serial, *buf + *buflen, 1); |
6f22a8ef UH |
779 | if (len > 0) { |
780 | *buflen += len; | |
781 | *(*buf + *buflen) = '\0'; | |
318dd53c BV |
782 | if (*buflen > 0 && (*(*buf + *buflen - 1) == '\r' |
783 | || *(*buf + *buflen - 1) == '\n')) { | |
784 | /* Strip CR/LF and terminate. */ | |
6f22a8ef UH |
785 | *(*buf + --*buflen) = '\0'; |
786 | break; | |
787 | } | |
788 | } | |
789 | if (g_get_monotonic_time() - start > timeout_ms) | |
790 | /* Timeout */ | |
791 | break; | |
5715e84f DT |
792 | if (len < 1) |
793 | g_usleep(2000); | |
6f22a8ef | 794 | } |
318dd53c BV |
795 | if (*buflen) |
796 | sr_dbg("Received %d: '%s'.", *buflen, *buf); | |
6f22a8ef UH |
797 | |
798 | return SR_OK; | |
799 | } | |
766456be UH |
800 | |
801 | /** | |
802 | * Try to find a valid packet in a serial data stream. | |
803 | * | |
804 | * @param serial Previously initialized serial port structure. | |
805 | * @param buf Buffer containing the bytes to write. | |
806 | * @param count Size of the buffer. | |
807 | * @param packet_size Size, in bytes, of a valid packet. | |
808 | * @param is_valid Callback that assesses whether the packet is valid or not. | |
809 | * @param timeout_ms The timeout after which, if no packet is detected, to | |
810 | * abort scanning. | |
811 | * @param baudrate The baudrate of the serial port. This parameter is not | |
812 | * critical, but it helps fine tune the serial port polling | |
813 | * delay. | |
814 | * | |
815 | * @return SR_OK if a valid packet is found within the given timeout, | |
816 | * SR_ERR upon failure. | |
817 | */ | |
818 | SR_PRIV int serial_stream_detect(struct sr_serial_dev_inst *serial, | |
819 | uint8_t *buf, size_t *buflen, | |
820 | size_t packet_size, packet_valid_t is_valid, | |
821 | uint64_t timeout_ms, int baudrate) | |
822 | { | |
823 | uint64_t start, time, byte_delay_us; | |
824 | size_t ibuf, i, maxlen; | |
825 | int len; | |
826 | ||
827 | maxlen = *buflen; | |
828 | ||
829 | sr_dbg("Detecting packets on FD %d (timeout = %" PRIu64 | |
830 | "ms, baudrate = %d).", serial->fd, timeout_ms, baudrate); | |
831 | ||
832 | if (maxlen < (packet_size / 2) ) { | |
833 | sr_err("Buffer size must be at least twice the packet size."); | |
834 | return SR_ERR; | |
835 | } | |
836 | ||
766456be UH |
837 | /* Assume 8n1 transmission. That is 10 bits for every byte. */ |
838 | byte_delay_us = 10 * (1000000 / baudrate); | |
839 | start = g_get_monotonic_time(); | |
840 | ||
841 | i = ibuf = len = 0; | |
842 | while (ibuf < maxlen) { | |
843 | len = serial_read(serial, &buf[ibuf], 1); | |
844 | if (len > 0) { | |
845 | ibuf += len; | |
846 | } else if (len == 0) { | |
006dbe55 | 847 | /* No logging, already done in serial_read(). */ |
766456be UH |
848 | } else { |
849 | /* Error reading byte, but continuing anyway. */ | |
850 | } | |
551c3d8c AG |
851 | |
852 | time = g_get_monotonic_time() - start; | |
853 | time /= 1000; | |
854 | ||
766456be UH |
855 | if ((ibuf - i) >= packet_size) { |
856 | /* We have at least a packet's worth of data. */ | |
857 | if (is_valid(&buf[i])) { | |
766456be UH |
858 | sr_spew("Found valid %d-byte packet after " |
859 | "%" PRIu64 "ms.", (ibuf - i), time); | |
860 | *buflen = ibuf; | |
861 | return SR_OK; | |
862 | } else { | |
863 | sr_spew("Got %d bytes, but not a valid " | |
864 | "packet.", (ibuf - i)); | |
865 | } | |
866 | /* Not a valid packet. Continue searching. */ | |
867 | i++; | |
868 | } | |
551c3d8c | 869 | if (time >= timeout_ms) { |
766456be | 870 | /* Timeout */ |
551c3d8c | 871 | sr_dbg("Detection timed out after %dms.", time); |
766456be UH |
872 | break; |
873 | } | |
5715e84f DT |
874 | if (len < 1) |
875 | g_usleep(byte_delay_us); | |
766456be UH |
876 | } |
877 | ||
878 | *buflen = ibuf; | |
879 | ||
880 | sr_err("Didn't find a valid packet (read %d bytes).", *buflen); | |
881 | ||
882 | return SR_ERR; | |
883 | } |