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7b9d7320 DJ |
1 | /* |
2 | * This file is part of the libsigrok project. | |
3 | * | |
4 | * Copyright (C) 2013 poljar (Damir Jelić) <poljarinho@gmail.com> | |
5 | * | |
6 | * This program is free software: you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation, either version 3 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
18 | */ | |
19 | ||
20 | #include "libsigrok.h" | |
21 | #include "libsigrok-internal.h" | |
22 | ||
23 | #include <glib.h> | |
24 | #include <string.h> | |
25 | ||
3544f848 | 26 | #define LOG_PREFIX "scpi" |
7b9d7320 DJ |
27 | |
28 | #define SCPI_READ_RETRIES 100 | |
29 | #define SCPI_READ_RETRY_TIMEOUT 10000 | |
30 | ||
aa1e3b40 DJ |
31 | /** |
32 | * Parse a string representation of a boolean-like value into a gboolean. | |
33 | * Similar to sr_parse_boolstring but rejects strings which do not represent | |
34 | * a boolean-like value. | |
35 | * | |
36 | * @param str String to convert. | |
37 | * @param ret Pointer to a gboolean where the result of the conversion will be | |
38 | * stored. | |
39 | * | |
40 | * @return SR_OK on success, SR_ERR on failure. | |
41 | */ | |
d5976d8b | 42 | static int parse_strict_bool(const char *str, gboolean *ret) |
aa1e3b40 DJ |
43 | { |
44 | if (!str) | |
45 | return SR_ERR_ARG; | |
46 | ||
47 | if (!g_strcmp0(str, "1") || | |
48 | !g_ascii_strncasecmp(str, "y", 1) || | |
49 | !g_ascii_strncasecmp(str, "t", 1) || | |
50 | !g_ascii_strncasecmp(str, "yes", 3) || | |
51 | !g_ascii_strncasecmp(str, "true", 4) || | |
52 | !g_ascii_strncasecmp(str, "on", 2)) { | |
aa1e3b40 DJ |
53 | *ret = TRUE; |
54 | return SR_OK; | |
aa1e3b40 DJ |
55 | } else if (!g_strcmp0(str, "0") || |
56 | !g_ascii_strncasecmp(str, "n", 1) || | |
57 | !g_ascii_strncasecmp(str, "f", 1) || | |
58 | !g_ascii_strncasecmp(str, "no", 2) || | |
59 | !g_ascii_strncasecmp(str, "false", 5) || | |
60 | !g_ascii_strncasecmp(str, "off", 3)) { | |
aa1e3b40 DJ |
61 | *ret = FALSE; |
62 | return SR_OK; | |
63 | } | |
64 | ||
65 | return SR_ERR; | |
66 | } | |
67 | ||
23f43dff ML |
68 | /** |
69 | * Open SCPI device. | |
70 | * | |
71 | * @param scpi Previously initialized SCPI device structure. | |
72 | * | |
73 | * @return SR_OK on success, SR_ERR on failure. | |
74 | */ | |
75 | SR_PRIV int sr_scpi_open(struct sr_scpi_dev_inst *scpi) | |
76 | { | |
77 | return scpi->open(scpi->priv); | |
78 | } | |
79 | ||
80 | /** | |
81 | * Add an event source for an SCPI device. | |
82 | * | |
83 | * @param scpi Previously initialized SCPI device structure. | |
84 | * @param events Events to check for. | |
85 | * @param timeout Max time to wait before the callback is called, ignored if 0. | |
86 | * @param cb Callback function to add. Must not be NULL. | |
87 | * @param cb_data Data for the callback function. Can be NULL. | |
88 | * | |
89 | * @return SR_OK upon success, SR_ERR_ARG upon invalid arguments, or | |
90 | * SR_ERR_MALLOC upon memory allocation errors. | |
91 | */ | |
92 | SR_PRIV int sr_scpi_source_add(struct sr_scpi_dev_inst *scpi, int events, | |
93 | int timeout, sr_receive_data_callback_t cb, void *cb_data) | |
94 | { | |
95 | return scpi->source_add(scpi->priv, events, timeout, cb, cb_data); | |
96 | } | |
97 | ||
98 | /** | |
99 | * Remove event source for an SCPI device. | |
100 | * | |
101 | * @param scpi Previously initialized SCPI device structure. | |
102 | * | |
103 | * @return SR_OK upon success, SR_ERR_ARG upon invalid arguments, or | |
104 | * SR_ERR_MALLOC upon memory allocation errors, SR_ERR_BUG upon | |
105 | * internal errors. | |
106 | */ | |
107 | SR_PRIV int sr_scpi_source_remove(struct sr_scpi_dev_inst *scpi) | |
108 | { | |
109 | return scpi->source_remove(scpi->priv); | |
110 | } | |
111 | ||
7b9d7320 DJ |
112 | /** |
113 | * Send a SCPI command. | |
114 | * | |
23f43dff | 115 | * @param scpi Previously initialized SCPI device structure. |
504f40a5 | 116 | * @param format Format string, to be followed by any necessary arguments. |
7b9d7320 DJ |
117 | * |
118 | * @return SR_OK on success, SR_ERR on failure. | |
119 | */ | |
23f43dff | 120 | SR_PRIV int sr_scpi_send(struct sr_scpi_dev_inst *scpi, |
504f40a5 | 121 | const char *format, ...) |
7b9d7320 | 122 | { |
87c41083 ML |
123 | va_list args; |
124 | int ret; | |
125 | ||
126 | va_start(args, format); | |
127 | ret = sr_scpi_send_variadic(scpi, format, args); | |
128 | va_end(args); | |
129 | ||
130 | return ret; | |
131 | } | |
132 | ||
133 | /** | |
134 | * Send a SCPI command with a variadic argument list. | |
135 | * | |
136 | * @param scpi Previously initialized SCPI device structure. | |
137 | * @param format Format string. | |
138 | * @param args Argument list. | |
139 | * | |
140 | * @return SR_OK on success, SR_ERR on failure. | |
141 | */ | |
142 | SR_PRIV int sr_scpi_send_variadic(struct sr_scpi_dev_inst *scpi, | |
143 | const char *format, va_list args) | |
144 | { | |
145 | va_list args_copy; | |
504f40a5 ML |
146 | char *buf; |
147 | int len, ret; | |
148 | ||
504f40a5 | 149 | /* Get length of buffer required. */ |
87c41083 ML |
150 | va_copy(args_copy, args); |
151 | len = vsnprintf(NULL, 0, format, args_copy); | |
152 | va_end(args_copy); | |
504f40a5 ML |
153 | |
154 | /* Allocate buffer and write out command. */ | |
155 | buf = g_malloc(len + 1); | |
87c41083 | 156 | vsprintf(buf, format, args); |
504f40a5 ML |
157 | |
158 | /* Send command. */ | |
159 | ret = scpi->send(scpi->priv, buf); | |
160 | ||
161 | /* Free command buffer. */ | |
162 | g_free(buf); | |
163 | ||
164 | return ret; | |
23f43dff | 165 | } |
7b9d7320 | 166 | |
23f43dff | 167 | /** |
05c644ea | 168 | * Begin receiving an SCPI reply. |
23f43dff ML |
169 | * |
170 | * @param scpi Previously initialised SCPI device structure. | |
23f43dff | 171 | * |
05c644ea | 172 | * @return SR_OK on success, SR_ERR on failure. |
23f43dff | 173 | */ |
05c644ea | 174 | SR_PRIV int sr_scpi_read_begin(struct sr_scpi_dev_inst *scpi) |
23f43dff | 175 | { |
05c644ea | 176 | return scpi->read_begin(scpi->priv); |
23f43dff | 177 | } |
7b9d7320 | 178 | |
a1ff9c18 ML |
179 | /** |
180 | * Read part of a response from SCPI device. | |
181 | * | |
182 | * @param scpi Previously initialised SCPI device structure. | |
183 | * @param buf Buffer to store result. | |
184 | * @param maxlen Maximum number of bytes to read. | |
185 | * | |
186 | * @return Number of bytes read, or SR_ERR upon failure. | |
187 | */ | |
05c644ea | 188 | SR_PRIV int sr_scpi_read_data(struct sr_scpi_dev_inst *scpi, |
a1ff9c18 ML |
189 | char *buf, int maxlen) |
190 | { | |
05c644ea ML |
191 | return scpi->read_data(scpi->priv, buf, maxlen); |
192 | } | |
193 | ||
194 | /** | |
195 | * Check whether a complete SCPI response has been received. | |
196 | * | |
197 | * @param scpi Previously initialised SCPI device structure. | |
198 | * | |
199 | * @return 1 if complete, 0 otherwise. | |
200 | */ | |
201 | SR_PRIV int sr_scpi_read_complete(struct sr_scpi_dev_inst *scpi) | |
202 | { | |
203 | return scpi->read_complete(scpi->priv); | |
a1ff9c18 ML |
204 | } |
205 | ||
23f43dff ML |
206 | /** |
207 | * Close SCPI device. | |
208 | * | |
209 | * @param scpi Previously initialized SCPI device structure. | |
210 | * | |
211 | * @return SR_OK on success, SR_ERR on failure. | |
212 | */ | |
213 | SR_PRIV int sr_scpi_close(struct sr_scpi_dev_inst *scpi) | |
214 | { | |
215 | return scpi->close(scpi->priv); | |
216 | } | |
7b9d7320 | 217 | |
23f43dff ML |
218 | /** |
219 | * Free SCPI device. | |
220 | * | |
221 | * @param scpi Previously initialized SCPI device structure. | |
222 | * | |
223 | * @return SR_OK on success, SR_ERR on failure. | |
224 | */ | |
225 | SR_PRIV void sr_scpi_free(struct sr_scpi_dev_inst *scpi) | |
226 | { | |
227 | scpi->free(scpi->priv); | |
228 | g_free(scpi); | |
7b9d7320 DJ |
229 | } |
230 | ||
231 | /** | |
232 | * Send a SCPI command, receive the reply and store the reply in scpi_response. | |
233 | * | |
23f43dff | 234 | * @param scpi Previously initialised SCPI device structure. |
7b9d7320 | 235 | * @param command The SCPI command to send to the device (can be NULL). |
d5976d8b | 236 | * @param scpi_response Pointer where to store the SCPI response. |
7b9d7320 | 237 | * |
05c644ea | 238 | * @return SR_OK on success, SR_ERR on failure. |
7b9d7320 | 239 | */ |
23f43dff | 240 | SR_PRIV int sr_scpi_get_string(struct sr_scpi_dev_inst *scpi, |
d5976d8b | 241 | const char *command, char **scpi_response) |
7b9d7320 | 242 | { |
05c644ea ML |
243 | char buf[256]; |
244 | int len; | |
245 | GString *response; | |
246 | ||
7b9d7320 | 247 | if (command) |
23f43dff | 248 | if (sr_scpi_send(scpi, command) != SR_OK) |
7b9d7320 DJ |
249 | return SR_ERR; |
250 | ||
05c644ea ML |
251 | if (sr_scpi_read_begin(scpi) != SR_OK) |
252 | return SR_ERR; | |
253 | ||
254 | response = g_string_new(""); | |
255 | ||
256 | *scpi_response = NULL; | |
257 | ||
258 | while (!sr_scpi_read_complete(scpi)) { | |
259 | len = sr_scpi_read_data(scpi, buf, sizeof(buf)); | |
260 | if (len < 0) { | |
261 | g_string_free(response, TRUE); | |
262 | return SR_ERR; | |
263 | } | |
264 | g_string_append_len(response, buf, len); | |
265 | } | |
266 | ||
267 | *scpi_response = response->str; | |
268 | g_string_free(response, FALSE); | |
269 | ||
270 | return SR_OK; | |
d730f70e DJ |
271 | } |
272 | ||
273 | /** | |
274 | * Send a SCPI command, read the reply, parse it as a bool value and store the | |
275 | * result in scpi_response. | |
276 | * | |
23f43dff | 277 | * @param scpi Previously initialised SCPI device structure. |
d730f70e DJ |
278 | * @param command The SCPI command to send to the device (can be NULL). |
279 | * @param scpi_response Pointer where to store the parsed result. | |
280 | * | |
281 | * @return SR_OK on success, SR_ERR on failure. | |
282 | */ | |
23f43dff | 283 | SR_PRIV int sr_scpi_get_bool(struct sr_scpi_dev_inst *scpi, |
d730f70e DJ |
284 | const char *command, gboolean *scpi_response) |
285 | { | |
286 | int ret; | |
287 | char *response; | |
288 | ||
289 | response = NULL; | |
290 | ||
23f43dff | 291 | if (sr_scpi_get_string(scpi, command, &response) != SR_OK) |
d730f70e DJ |
292 | if (!response) |
293 | return SR_ERR; | |
294 | ||
d5976d8b | 295 | if (parse_strict_bool(response, scpi_response) == SR_OK) |
d730f70e DJ |
296 | ret = SR_OK; |
297 | else | |
298 | ret = SR_ERR; | |
299 | ||
300 | g_free(response); | |
301 | ||
302 | return ret; | |
303 | } | |
304 | ||
305 | /** | |
306 | * Send a SCPI command, read the reply, parse it as an integer and store the | |
307 | * result in scpi_response. | |
308 | * | |
23f43dff | 309 | * @param scpi Previously initialised SCPI device structure. |
d730f70e DJ |
310 | * @param command The SCPI command to send to the device (can be NULL). |
311 | * @param scpi_response Pointer where to store the parsed result. | |
312 | * | |
313 | * @return SR_OK on success, SR_ERR on failure. | |
314 | */ | |
23f43dff | 315 | SR_PRIV int sr_scpi_get_int(struct sr_scpi_dev_inst *scpi, |
d5976d8b | 316 | const char *command, int *scpi_response) |
d730f70e DJ |
317 | { |
318 | int ret; | |
319 | char *response; | |
320 | ||
321 | response = NULL; | |
322 | ||
23f43dff | 323 | if (sr_scpi_get_string(scpi, command, &response) != SR_OK) |
d730f70e DJ |
324 | if (!response) |
325 | return SR_ERR; | |
326 | ||
327 | if (sr_atoi(response, scpi_response) == SR_OK) | |
328 | ret = SR_OK; | |
329 | else | |
330 | ret = SR_ERR; | |
331 | ||
332 | g_free(response); | |
333 | ||
334 | return ret; | |
335 | } | |
336 | ||
337 | /** | |
338 | * Send a SCPI command, read the reply, parse it as a float and store the | |
339 | * result in scpi_response. | |
340 | * | |
23f43dff | 341 | * @param scpi Previously initialised SCPI device structure. |
d730f70e DJ |
342 | * @param command The SCPI command to send to the device (can be NULL). |
343 | * @param scpi_response Pointer where to store the parsed result. | |
344 | * | |
345 | * @return SR_OK on success, SR_ERR on failure. | |
346 | */ | |
23f43dff | 347 | SR_PRIV int sr_scpi_get_float(struct sr_scpi_dev_inst *scpi, |
d730f70e DJ |
348 | const char *command, float *scpi_response) |
349 | { | |
350 | int ret; | |
351 | char *response; | |
352 | ||
353 | response = NULL; | |
354 | ||
23f43dff | 355 | if (sr_scpi_get_string(scpi, command, &response) != SR_OK) |
d730f70e DJ |
356 | if (!response) |
357 | return SR_ERR; | |
358 | ||
359 | if (sr_atof(response, scpi_response) == SR_OK) | |
360 | ret = SR_OK; | |
361 | else | |
362 | ret = SR_ERR; | |
363 | ||
364 | g_free(response); | |
365 | ||
366 | return ret; | |
367 | } | |
368 | ||
369 | /** | |
370 | * Send a SCPI command, read the reply, parse it as a double and store the | |
371 | * result in scpi_response. | |
372 | * | |
23f43dff | 373 | * @param scpi Previously initialised SCPI device structure. |
d730f70e DJ |
374 | * @param command The SCPI command to send to the device (can be NULL). |
375 | * @param scpi_response Pointer where to store the parsed result. | |
376 | * | |
377 | * @return SR_OK on success, SR_ERR on failure. | |
378 | */ | |
23f43dff | 379 | SR_PRIV int sr_scpi_get_double(struct sr_scpi_dev_inst *scpi, |
d5976d8b | 380 | const char *command, double *scpi_response) |
d730f70e DJ |
381 | { |
382 | int ret; | |
383 | char *response; | |
384 | ||
385 | response = NULL; | |
386 | ||
23f43dff | 387 | if (sr_scpi_get_string(scpi, command, &response) != SR_OK) |
d730f70e DJ |
388 | if (!response) |
389 | return SR_ERR; | |
390 | ||
391 | if (sr_atod(response, scpi_response) == SR_OK) | |
392 | ret = SR_OK; | |
393 | else | |
394 | ret = SR_ERR; | |
395 | ||
396 | g_free(response); | |
397 | ||
7b9d7320 DJ |
398 | return ret; |
399 | } | |
400 | ||
f5922ade DJ |
401 | /** |
402 | * Send a SCPI *OPC? command, read the reply and return the result of the | |
403 | * command. | |
404 | * | |
23f43dff | 405 | * @param scpi Previously initialised SCPI device structure. |
f5922ade DJ |
406 | * |
407 | * @return SR_OK on success, SR_ERR on failure. | |
408 | */ | |
23f43dff | 409 | SR_PRIV int sr_scpi_get_opc(struct sr_scpi_dev_inst *scpi) |
f5922ade DJ |
410 | { |
411 | unsigned int i; | |
412 | gboolean opc; | |
413 | ||
414 | for (i = 0; i < SCPI_READ_RETRIES; ++i) { | |
23f43dff | 415 | sr_scpi_get_bool(scpi, SCPI_CMD_OPC, &opc); |
f5922ade DJ |
416 | if (opc) |
417 | return SR_OK; | |
f5922ade DJ |
418 | g_usleep(SCPI_READ_RETRY_TIMEOUT); |
419 | } | |
420 | ||
421 | return SR_ERR; | |
422 | } | |
423 | ||
8acbb89a DJ |
424 | /** |
425 | * Send a SCPI command, read the reply, parse it as comma separated list of | |
426 | * floats and store the as an result in scpi_response. | |
427 | * | |
23f43dff | 428 | * @param scpi Previously initialised SCPI device structure. |
8acbb89a DJ |
429 | * @param command The SCPI command to send to the device (can be NULL). |
430 | * @param scpi_response Pointer where to store the parsed result. | |
431 | * | |
432 | * @return SR_OK upon successfully parsing all values, SR_ERR upon a parsing | |
d5976d8b UH |
433 | * error or upon no response. The allocated response must be freed by |
434 | * the caller in the case of an SR_OK as well as in the case of | |
435 | * parsing error. | |
8acbb89a | 436 | */ |
23f43dff | 437 | SR_PRIV int sr_scpi_get_floatv(struct sr_scpi_dev_inst *scpi, |
d5976d8b | 438 | const char *command, GArray **scpi_response) |
8acbb89a DJ |
439 | { |
440 | int ret; | |
441 | float tmp; | |
442 | char *response; | |
d5976d8b | 443 | gchar **ptr, **tokens; |
8acbb89a DJ |
444 | GArray *response_array; |
445 | ||
446 | ret = SR_OK; | |
447 | response = NULL; | |
448 | tokens = NULL; | |
449 | ||
23f43dff | 450 | if (sr_scpi_get_string(scpi, command, &response) != SR_OK) |
8acbb89a DJ |
451 | if (!response) |
452 | return SR_ERR; | |
453 | ||
454 | tokens = g_strsplit(response, ",", 0); | |
455 | ptr = tokens; | |
456 | ||
457 | response_array = g_array_sized_new(TRUE, FALSE, sizeof(float), 256); | |
458 | ||
d5976d8b | 459 | while (*ptr) { |
8acbb89a DJ |
460 | if (sr_atof(*ptr, &tmp) == SR_OK) |
461 | response_array = g_array_append_val(response_array, | |
462 | tmp); | |
463 | else | |
464 | ret = SR_ERR; | |
465 | ||
466 | ptr++; | |
467 | } | |
468 | g_strfreev(tokens); | |
469 | g_free(response); | |
470 | ||
471 | if (ret == SR_ERR && response_array->len == 0) { | |
472 | g_array_free(response_array, TRUE); | |
473 | *scpi_response = NULL; | |
474 | return SR_ERR; | |
475 | } | |
476 | ||
477 | *scpi_response = response_array; | |
478 | ||
1a323dd8 DJ |
479 | return ret; |
480 | } | |
481 | ||
482 | /** | |
483 | * Send a SCPI command, read the reply, parse it as comma separated list of | |
484 | * unsigned 8 bit integers and store the as an result in scpi_response. | |
485 | * | |
23f43dff | 486 | * @param scpi Previously initialised SCPI device structure. |
1a323dd8 DJ |
487 | * @param command The SCPI command to send to the device (can be NULL). |
488 | * @param scpi_response Pointer where to store the parsed result. | |
489 | * | |
490 | * @return SR_OK upon successfully parsing all values, SR_ERR upon a parsing | |
d5976d8b UH |
491 | * error or upon no response. The allocated response must be freed by |
492 | * the caller in the case of an SR_OK as well as in the case of | |
493 | * parsing error. | |
1a323dd8 | 494 | */ |
23f43dff | 495 | SR_PRIV int sr_scpi_get_uint8v(struct sr_scpi_dev_inst *scpi, |
d5976d8b | 496 | const char *command, GArray **scpi_response) |
1a323dd8 | 497 | { |
d5976d8b | 498 | int tmp, ret; |
1a323dd8 | 499 | char *response; |
d5976d8b | 500 | gchar **ptr, **tokens; |
1a323dd8 DJ |
501 | GArray *response_array; |
502 | ||
503 | ret = SR_OK; | |
504 | response = NULL; | |
505 | tokens = NULL; | |
506 | ||
23f43dff | 507 | if (sr_scpi_get_string(scpi, command, &response) != SR_OK) |
1a323dd8 DJ |
508 | if (!response) |
509 | return SR_ERR; | |
510 | ||
511 | tokens = g_strsplit(response, ",", 0); | |
512 | ptr = tokens; | |
513 | ||
514 | response_array = g_array_sized_new(TRUE, FALSE, sizeof(uint8_t), 256); | |
515 | ||
d5976d8b | 516 | while (*ptr) { |
1a323dd8 DJ |
517 | if (sr_atoi(*ptr, &tmp) == SR_OK) |
518 | response_array = g_array_append_val(response_array, | |
519 | tmp); | |
520 | else | |
521 | ret = SR_ERR; | |
522 | ||
523 | ptr++; | |
524 | } | |
525 | g_strfreev(tokens); | |
526 | g_free(response); | |
527 | ||
528 | if (response_array->len == 0) { | |
529 | g_array_free(response_array, TRUE); | |
530 | *scpi_response = NULL; | |
531 | return SR_ERR; | |
532 | } | |
533 | ||
534 | *scpi_response = response_array; | |
535 | ||
8acbb89a DJ |
536 | return ret; |
537 | } | |
538 | ||
7b9d7320 DJ |
539 | /** |
540 | * Send the *IDN? SCPI command, receive the reply, parse it and store the | |
541 | * reply as a sr_scpi_hw_info structure in the supplied scpi_response pointer. | |
542 | * | |
d5976d8b UH |
543 | * The hw_info structure must be freed by the caller via sr_scpi_hw_info_free(). |
544 | * | |
23f43dff | 545 | * @param scpi Previously initialised SCPI device structure. |
7b9d7320 DJ |
546 | * @param scpi_response Pointer where to store the hw_info structure. |
547 | * | |
548 | * @return SR_OK upon success, SR_ERR on failure. | |
7b9d7320 | 549 | */ |
23f43dff | 550 | SR_PRIV int sr_scpi_get_hw_id(struct sr_scpi_dev_inst *scpi, |
7b9d7320 DJ |
551 | struct sr_scpi_hw_info **scpi_response) |
552 | { | |
553 | int num_tokens; | |
554 | char *response; | |
bc7b7eb1 | 555 | char *newline; |
7b9d7320 | 556 | gchar **tokens; |
7b9d7320 DJ |
557 | struct sr_scpi_hw_info *hw_info; |
558 | ||
559 | response = NULL; | |
560 | tokens = NULL; | |
561 | ||
23f43dff | 562 | if (sr_scpi_get_string(scpi, SCPI_CMD_IDN, &response) != SR_OK) |
7b9d7320 DJ |
563 | if (!response) |
564 | return SR_ERR; | |
565 | ||
77c16c04 ML |
566 | sr_info("Got IDN string: '%s'", response); |
567 | ||
bc7b7eb1 ML |
568 | /* Remove trailing newline if present. */ |
569 | if ((newline = g_strrstr(response, "\n"))) | |
570 | newline[0] = '\0'; | |
571 | ||
7b9d7320 DJ |
572 | /* |
573 | * The response to a '*IDN?' is specified by the SCPI spec. It contains | |
574 | * a comma-separated list containing the manufacturer name, instrument | |
575 | * model, serial number of the instrument and the firmware version. | |
576 | */ | |
577 | tokens = g_strsplit(response, ",", 0); | |
578 | ||
579 | for (num_tokens = 0; tokens[num_tokens] != NULL; num_tokens++); | |
580 | ||
581 | if (num_tokens != 4) { | |
d5976d8b | 582 | sr_dbg("IDN response not according to spec: %80.s.", response); |
7b9d7320 DJ |
583 | g_strfreev(tokens); |
584 | g_free(response); | |
585 | return SR_ERR; | |
586 | } | |
587 | g_free(response); | |
588 | ||
589 | hw_info = g_try_malloc(sizeof(struct sr_scpi_hw_info)); | |
590 | if (!hw_info) { | |
591 | g_strfreev(tokens); | |
592 | return SR_ERR_MALLOC; | |
593 | } | |
594 | ||
595 | hw_info->manufacturer = g_strdup(tokens[0]); | |
596 | hw_info->model = g_strdup(tokens[1]); | |
597 | hw_info->serial_number = g_strdup(tokens[2]); | |
598 | hw_info->firmware_version = g_strdup(tokens[3]); | |
599 | ||
600 | g_strfreev(tokens); | |
601 | ||
602 | *scpi_response = hw_info; | |
603 | ||
604 | return SR_OK; | |
605 | } | |
606 | ||
607 | /** | |
608 | * Free a sr_scpi_hw_info struct. | |
609 | * | |
610 | * @param hw_info Pointer to the struct to free. | |
611 | * | |
612 | * This function is safe to call with a NULL pointer. | |
613 | */ | |
614 | SR_PRIV void sr_scpi_hw_info_free(struct sr_scpi_hw_info *hw_info) | |
615 | { | |
616 | if (hw_info) { | |
617 | g_free(hw_info->manufacturer); | |
618 | g_free(hw_info->model); | |
619 | g_free(hw_info->serial_number); | |
620 | g_free(hw_info->firmware_version); | |
621 | g_free(hw_info); | |
622 | } | |
623 | } |