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1 | /* | |
2 | * This file is part of the libsigrok project. | |
3 | * | |
4 | * Copyright (C) 2013 poljar (Damir Jelić) <poljarinho@gmail.com> | |
5 | * Copyright (C) 2015 Bert Vermeulen <bert@biot.com> | |
6 | * | |
7 | * This program is free software: you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation, either version 3 of the License, or | |
10 | * (at your option) any later version. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | * GNU General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License | |
18 | * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
19 | */ | |
20 | ||
21 | #include <config.h> | |
22 | #include <glib.h> | |
23 | #include <string.h> | |
24 | #include <libsigrok/libsigrok.h> | |
25 | #include "libsigrok-internal.h" | |
26 | #include "scpi.h" | |
27 | ||
28 | #define LOG_PREFIX "scpi" | |
29 | ||
30 | #define SCPI_READ_RETRIES 100 | |
31 | #define SCPI_READ_RETRY_TIMEOUT_US (10 * 1000) | |
32 | ||
33 | static const char *scpi_vendors[][2] = { | |
34 | { "HEWLETT-PACKARD", "HP" }, | |
35 | { "Agilent Technologies", "Agilent" }, | |
36 | { "RIGOL TECHNOLOGIES", "Rigol" }, | |
37 | { "PHILIPS", "Philips" }, | |
38 | { "CHROMA", "Chroma" }, | |
39 | { "Chroma ATE", "Chroma" }, | |
40 | }; | |
41 | ||
42 | /** | |
43 | * Parse a string representation of a boolean-like value into a gboolean. | |
44 | * Similar to sr_parse_boolstring but rejects strings which do not represent | |
45 | * a boolean-like value. | |
46 | * | |
47 | * @param str String to convert. | |
48 | * @param ret Pointer to a gboolean where the result of the conversion will be | |
49 | * stored. | |
50 | * | |
51 | * @return SR_OK on success, SR_ERR on failure. | |
52 | */ | |
53 | static int parse_strict_bool(const char *str, gboolean *ret) | |
54 | { | |
55 | if (!str) | |
56 | return SR_ERR_ARG; | |
57 | ||
58 | if (!g_strcmp0(str, "1") || | |
59 | !g_ascii_strncasecmp(str, "y", 1) || | |
60 | !g_ascii_strncasecmp(str, "t", 1) || | |
61 | !g_ascii_strncasecmp(str, "yes", 3) || | |
62 | !g_ascii_strncasecmp(str, "true", 4) || | |
63 | !g_ascii_strncasecmp(str, "on", 2)) { | |
64 | *ret = TRUE; | |
65 | return SR_OK; | |
66 | } else if (!g_strcmp0(str, "0") || | |
67 | !g_ascii_strncasecmp(str, "n", 1) || | |
68 | !g_ascii_strncasecmp(str, "f", 1) || | |
69 | !g_ascii_strncasecmp(str, "no", 2) || | |
70 | !g_ascii_strncasecmp(str, "false", 5) || | |
71 | !g_ascii_strncasecmp(str, "off", 3)) { | |
72 | *ret = FALSE; | |
73 | return SR_OK; | |
74 | } | |
75 | ||
76 | return SR_ERR; | |
77 | } | |
78 | ||
79 | SR_PRIV extern const struct sr_scpi_dev_inst scpi_serial_dev; | |
80 | SR_PRIV extern const struct sr_scpi_dev_inst scpi_tcp_raw_dev; | |
81 | SR_PRIV extern const struct sr_scpi_dev_inst scpi_tcp_rigol_dev; | |
82 | SR_PRIV extern const struct sr_scpi_dev_inst scpi_usbtmc_libusb_dev; | |
83 | SR_PRIV extern const struct sr_scpi_dev_inst scpi_vxi_dev; | |
84 | SR_PRIV extern const struct sr_scpi_dev_inst scpi_visa_dev; | |
85 | SR_PRIV extern const struct sr_scpi_dev_inst scpi_libgpib_dev; | |
86 | ||
87 | static const struct sr_scpi_dev_inst *scpi_devs[] = { | |
88 | &scpi_tcp_raw_dev, | |
89 | &scpi_tcp_rigol_dev, | |
90 | #ifdef HAVE_LIBUSB_1_0 | |
91 | &scpi_usbtmc_libusb_dev, | |
92 | #endif | |
93 | #if HAVE_RPC | |
94 | &scpi_vxi_dev, | |
95 | #endif | |
96 | #ifdef HAVE_LIBREVISA | |
97 | &scpi_visa_dev, | |
98 | #endif | |
99 | #ifdef HAVE_LIBGPIB | |
100 | &scpi_libgpib_dev, | |
101 | #endif | |
102 | #ifdef HAVE_LIBSERIALPORT | |
103 | &scpi_serial_dev, /* Must be last as it matches any resource. */ | |
104 | #endif | |
105 | }; | |
106 | ||
107 | static struct sr_dev_inst *sr_scpi_scan_resource(struct drv_context *drvc, | |
108 | const char *resource, const char *serialcomm, | |
109 | struct sr_dev_inst *(*probe_device)(struct sr_scpi_dev_inst *scpi)) | |
110 | { | |
111 | struct sr_scpi_dev_inst *scpi; | |
112 | struct sr_dev_inst *sdi; | |
113 | ||
114 | if (!(scpi = scpi_dev_inst_new(drvc, resource, serialcomm))) | |
115 | return NULL; | |
116 | ||
117 | if (sr_scpi_open(scpi) != SR_OK) { | |
118 | sr_info("Couldn't open SCPI device."); | |
119 | sr_scpi_free(scpi); | |
120 | return NULL; | |
121 | }; | |
122 | ||
123 | sdi = probe_device(scpi); | |
124 | ||
125 | sr_scpi_close(scpi); | |
126 | ||
127 | if (sdi) | |
128 | sdi->status = SR_ST_INACTIVE; | |
129 | else | |
130 | sr_scpi_free(scpi); | |
131 | ||
132 | return sdi; | |
133 | } | |
134 | ||
135 | /** | |
136 | * Send a SCPI command with a variadic argument list without mutex. | |
137 | * | |
138 | * @param scpi Previously initialized SCPI device structure. | |
139 | * @param format Format string. | |
140 | * @param args Argument list. | |
141 | * | |
142 | * @return SR_OK on success, SR_ERR on failure. | |
143 | */ | |
144 | static int scpi_send_variadic(struct sr_scpi_dev_inst *scpi, | |
145 | const char *format, va_list args) | |
146 | { | |
147 | va_list args_copy; | |
148 | char *buf; | |
149 | int len, ret; | |
150 | ||
151 | /* Get length of buffer required. */ | |
152 | va_copy(args_copy, args); | |
153 | len = vsnprintf(NULL, 0, format, args_copy); | |
154 | va_end(args_copy); | |
155 | ||
156 | /* Allocate buffer and write out command. */ | |
157 | buf = g_malloc0(len + 2); | |
158 | vsprintf(buf, format, args); | |
159 | if (buf[len - 1] != '\n') | |
160 | buf[len] = '\n'; | |
161 | ||
162 | /* Send command. */ | |
163 | ret = scpi->send(scpi->priv, buf); | |
164 | ||
165 | /* Free command buffer. */ | |
166 | g_free(buf); | |
167 | ||
168 | return ret; | |
169 | } | |
170 | ||
171 | /** | |
172 | * Send a SCPI command without mutex. | |
173 | * | |
174 | * @param scpi Previously initialized SCPI device structure. | |
175 | * @param format Format string, to be followed by any necessary arguments. | |
176 | * | |
177 | * @return SR_OK on success, SR_ERR on failure. | |
178 | */ | |
179 | static int scpi_send(struct sr_scpi_dev_inst *scpi, const char *format, | |
180 | va_list args) | |
181 | { | |
182 | return scpi_send_variadic(scpi, format, args); | |
183 | } | |
184 | ||
185 | /** | |
186 | * Send data to SCPI device without mutex. | |
187 | * | |
188 | * TODO: This is only implemented in TcpRaw, but never used. | |
189 | * TODO: Use Mutex at all? | |
190 | * | |
191 | * @param scpi Previously initialised SCPI device structure. | |
192 | * @param buf Buffer with data to send. | |
193 | * @param len Number of bytes to send. | |
194 | * | |
195 | * @return Number of bytes read, or SR_ERR upon failure. | |
196 | */ | |
197 | static int scpi_write_data(struct sr_scpi_dev_inst *scpi, char *buf, int maxlen) | |
198 | { | |
199 | return scpi->write_data(scpi->priv, buf, maxlen); | |
200 | } | |
201 | ||
202 | /** | |
203 | * Read part of a response from SCPI device without mutex. | |
204 | * | |
205 | * @param scpi Previously initialised SCPI device structure. | |
206 | * @param buf Buffer to store result. | |
207 | * @param maxlen Maximum number of bytes to read. | |
208 | * | |
209 | * @return Number of bytes read, or SR_ERR upon failure. | |
210 | */ | |
211 | static int scpi_read_data(struct sr_scpi_dev_inst *scpi, char *buf, int maxlen) | |
212 | { | |
213 | return scpi->read_data(scpi->priv, buf, maxlen); | |
214 | } | |
215 | ||
216 | /** | |
217 | * Do a non-blocking read of up to the allocated length, and | |
218 | * check if a timeout has occured, without mutex. | |
219 | * | |
220 | * @param scpi Previously initialised SCPI device structure. | |
221 | * @param response Buffer to which the response is appended. | |
222 | * @param abs_timeout_us Absolute timeout in microseconds | |
223 | * | |
224 | * @return read length on success, SR_ERR* on failure. | |
225 | */ | |
226 | static int scpi_read_response(struct sr_scpi_dev_inst *scpi, | |
227 | GString *response, gint64 abs_timeout_us) | |
228 | { | |
229 | int len, space; | |
230 | ||
231 | space = response->allocated_len - response->len; | |
232 | len = scpi->read_data(scpi->priv, &response->str[response->len], space); | |
233 | ||
234 | if (len < 0) { | |
235 | sr_err("Incompletely read SCPI response."); | |
236 | return SR_ERR; | |
237 | } | |
238 | ||
239 | if (len > 0) { | |
240 | g_string_set_size(response, response->len + len); | |
241 | return len; | |
242 | } | |
243 | ||
244 | if (g_get_monotonic_time() > abs_timeout_us) { | |
245 | sr_err("Timed out waiting for SCPI response."); | |
246 | return SR_ERR_TIMEOUT; | |
247 | } | |
248 | ||
249 | return 0; | |
250 | } | |
251 | ||
252 | /** | |
253 | * Send a SCPI command, receive the reply and store the reply in | |
254 | * scpi_response, without mutex. | |
255 | * | |
256 | * @param scpi Previously initialised SCPI device structure. | |
257 | * @param command The SCPI command to send to the device. | |
258 | * @param scpi_response Pointer where to store the SCPI response. | |
259 | * | |
260 | * @return SR_OK on success, SR_ERR on failure. | |
261 | */ | |
262 | static int scpi_get_data(struct sr_scpi_dev_inst *scpi, | |
263 | const char *command, GString **scpi_response) | |
264 | { | |
265 | int ret; | |
266 | GString *response; | |
267 | int space; | |
268 | gint64 timeout; | |
269 | va_list empty_va_list; | |
270 | ||
271 | /* Optionally send caller provided command. */ | |
272 | if (command) { | |
273 | if (scpi_send(scpi, command, empty_va_list) != SR_OK) | |
274 | return SR_ERR; | |
275 | } | |
276 | ||
277 | /* Initiate SCPI read operation. */ | |
278 | if (sr_scpi_read_begin(scpi) != SR_OK) | |
279 | return SR_ERR; | |
280 | ||
281 | /* Keep reading until completion or until timeout. */ | |
282 | timeout = g_get_monotonic_time() + scpi->read_timeout_us; | |
283 | ||
284 | response = *scpi_response; | |
285 | ||
286 | while (!sr_scpi_read_complete(scpi)) { | |
287 | /* Resize the buffer when free space drops below a threshold. */ | |
288 | space = response->allocated_len - response->len; | |
289 | if (space < 128) { | |
290 | int oldlen = response->len; | |
291 | g_string_set_size(response, oldlen + 1024); | |
292 | g_string_set_size(response, oldlen); | |
293 | } | |
294 | ||
295 | /* Read another chunk of the response. */ | |
296 | ret = scpi_read_response(scpi, response, timeout); | |
297 | ||
298 | if (ret < 0) | |
299 | return ret; | |
300 | if (ret > 0) | |
301 | timeout = g_get_monotonic_time() + scpi->read_timeout_us; | |
302 | } | |
303 | ||
304 | return SR_OK; | |
305 | } | |
306 | ||
307 | SR_PRIV GSList *sr_scpi_scan(struct drv_context *drvc, GSList *options, | |
308 | struct sr_dev_inst *(*probe_device)(struct sr_scpi_dev_inst *scpi)) | |
309 | { | |
310 | GSList *resources, *l, *devices; | |
311 | struct sr_dev_inst *sdi; | |
312 | const char *resource = NULL; | |
313 | const char *serialcomm = NULL; | |
314 | gchar **res; | |
315 | unsigned i; | |
316 | ||
317 | for (l = options; l; l = l->next) { | |
318 | struct sr_config *src = l->data; | |
319 | switch (src->key) { | |
320 | case SR_CONF_CONN: | |
321 | resource = g_variant_get_string(src->data, NULL); | |
322 | break; | |
323 | case SR_CONF_SERIALCOMM: | |
324 | serialcomm = g_variant_get_string(src->data, NULL); | |
325 | break; | |
326 | } | |
327 | } | |
328 | ||
329 | devices = NULL; | |
330 | for (i = 0; i < ARRAY_SIZE(scpi_devs); i++) { | |
331 | if ((resource && strcmp(resource, scpi_devs[i]->prefix)) | |
332 | || !scpi_devs[i]->scan) | |
333 | continue; | |
334 | resources = scpi_devs[i]->scan(drvc); | |
335 | for (l = resources; l; l = l->next) { | |
336 | res = g_strsplit(l->data, ":", 2); | |
337 | if (res[0] && (sdi = sr_scpi_scan_resource(drvc, res[0], | |
338 | serialcomm ? serialcomm : res[1], probe_device))) { | |
339 | devices = g_slist_append(devices, sdi); | |
340 | sdi->connection_id = g_strdup(l->data); | |
341 | } | |
342 | g_strfreev(res); | |
343 | } | |
344 | g_slist_free_full(resources, g_free); | |
345 | } | |
346 | ||
347 | if (!devices && resource) { | |
348 | sdi = sr_scpi_scan_resource(drvc, resource, serialcomm, probe_device); | |
349 | if (sdi) | |
350 | devices = g_slist_append(NULL, sdi); | |
351 | } | |
352 | ||
353 | /* Tack a copy of the newly found devices onto the driver list. */ | |
354 | if (devices) | |
355 | drvc->instances = g_slist_concat(drvc->instances, g_slist_copy(devices)); | |
356 | ||
357 | return devices; | |
358 | } | |
359 | ||
360 | SR_PRIV struct sr_scpi_dev_inst *scpi_dev_inst_new(struct drv_context *drvc, | |
361 | const char *resource, const char *serialcomm) | |
362 | { | |
363 | struct sr_scpi_dev_inst *scpi = NULL; | |
364 | const struct sr_scpi_dev_inst *scpi_dev; | |
365 | gchar **params; | |
366 | unsigned i; | |
367 | ||
368 | for (i = 0; i < ARRAY_SIZE(scpi_devs); i++) { | |
369 | scpi_dev = scpi_devs[i]; | |
370 | if (!strncmp(resource, scpi_dev->prefix, strlen(scpi_dev->prefix))) { | |
371 | sr_dbg("Opening %s device %s.", scpi_dev->name, resource); | |
372 | scpi = g_malloc(sizeof(*scpi)); | |
373 | *scpi = *scpi_dev; | |
374 | scpi->priv = g_malloc0(scpi->priv_size); | |
375 | scpi->read_timeout_us = 1000 * 1000; | |
376 | params = g_strsplit(resource, "/", 0); | |
377 | if (scpi->dev_inst_new(scpi->priv, drvc, resource, | |
378 | params, serialcomm) != SR_OK) { | |
379 | sr_scpi_free(scpi); | |
380 | scpi = NULL; | |
381 | } | |
382 | g_strfreev(params); | |
383 | break; | |
384 | } | |
385 | } | |
386 | ||
387 | return scpi; | |
388 | } | |
389 | ||
390 | /** | |
391 | * Open SCPI device. | |
392 | * | |
393 | * @param scpi Previously initialized SCPI device structure. | |
394 | * | |
395 | * @return SR_OK on success, SR_ERR on failure. | |
396 | */ | |
397 | SR_PRIV int sr_scpi_open(struct sr_scpi_dev_inst *scpi) | |
398 | { | |
399 | g_mutex_init(&scpi->scpi_mutex); | |
400 | ||
401 | return scpi->open(scpi); | |
402 | } | |
403 | ||
404 | /** | |
405 | * Add an event source for an SCPI device. | |
406 | * | |
407 | * @param session The session to add the event source to. | |
408 | * @param scpi Previously initialized SCPI device structure. | |
409 | * @param events Events to check for. | |
410 | * @param timeout Max time to wait before the callback is called, ignored if 0. | |
411 | * @param cb Callback function to add. Must not be NULL. | |
412 | * @param cb_data Data for the callback function. Can be NULL. | |
413 | * | |
414 | * @return SR_OK upon success, SR_ERR_ARG upon invalid arguments, or | |
415 | * SR_ERR_MALLOC upon memory allocation errors. | |
416 | */ | |
417 | SR_PRIV int sr_scpi_source_add(struct sr_session *session, | |
418 | struct sr_scpi_dev_inst *scpi, int events, int timeout, | |
419 | sr_receive_data_callback cb, void *cb_data) | |
420 | { | |
421 | return scpi->source_add(session, scpi->priv, events, timeout, cb, cb_data); | |
422 | } | |
423 | ||
424 | /** | |
425 | * Remove event source for an SCPI device. | |
426 | * | |
427 | * @param session The session to remove the event source from. | |
428 | * @param scpi Previously initialized SCPI device structure. | |
429 | * | |
430 | * @return SR_OK upon success, SR_ERR_ARG upon invalid arguments, or | |
431 | * SR_ERR_MALLOC upon memory allocation errors, SR_ERR_BUG upon | |
432 | * internal errors. | |
433 | */ | |
434 | SR_PRIV int sr_scpi_source_remove(struct sr_session *session, | |
435 | struct sr_scpi_dev_inst *scpi) | |
436 | { | |
437 | return scpi->source_remove(session, scpi->priv); | |
438 | } | |
439 | ||
440 | /** | |
441 | * Send a SCPI command. | |
442 | * | |
443 | * @param scpi Previously initialized SCPI device structure. | |
444 | * @param format Format string, to be followed by any necessary arguments. | |
445 | * | |
446 | * @return SR_OK on success, SR_ERR on failure. | |
447 | */ | |
448 | SR_PRIV int sr_scpi_send(struct sr_scpi_dev_inst *scpi, | |
449 | const char *format, ...) | |
450 | { | |
451 | va_list args; | |
452 | int ret; | |
453 | ||
454 | va_start(args, format); | |
455 | g_mutex_lock(&scpi->scpi_mutex); | |
456 | ret = scpi_send_variadic(scpi, format, args); | |
457 | g_mutex_unlock(&scpi->scpi_mutex); | |
458 | va_end(args); | |
459 | ||
460 | return ret; | |
461 | } | |
462 | ||
463 | /** | |
464 | * Send a SCPI command with a variadic argument list. | |
465 | * | |
466 | * @param scpi Previously initialized SCPI device structure. | |
467 | * @param format Format string. | |
468 | * @param args Argument list. | |
469 | * | |
470 | * @return SR_OK on success, SR_ERR on failure. | |
471 | */ | |
472 | SR_PRIV int sr_scpi_send_variadic(struct sr_scpi_dev_inst *scpi, | |
473 | const char *format, va_list args) | |
474 | { | |
475 | int ret; | |
476 | ||
477 | g_mutex_lock(&scpi->scpi_mutex); | |
478 | ret = scpi_send_variadic(scpi, format, args); | |
479 | g_mutex_unlock(&scpi->scpi_mutex); | |
480 | ||
481 | return ret; | |
482 | } | |
483 | ||
484 | /** | |
485 | * Begin receiving an SCPI reply. | |
486 | * | |
487 | * @param scpi Previously initialised SCPI device structure. | |
488 | * | |
489 | * @return SR_OK on success, SR_ERR on failure. | |
490 | */ | |
491 | SR_PRIV int sr_scpi_read_begin(struct sr_scpi_dev_inst *scpi) | |
492 | { | |
493 | return scpi->read_begin(scpi->priv); | |
494 | } | |
495 | ||
496 | /** | |
497 | * Read part of a response from SCPI device. | |
498 | * | |
499 | * @param scpi Previously initialised SCPI device structure. | |
500 | * @param buf Buffer to store result. | |
501 | * @param maxlen Maximum number of bytes to read. | |
502 | * | |
503 | * @return Number of bytes read, or SR_ERR upon failure. | |
504 | */ | |
505 | SR_PRIV int sr_scpi_read_data(struct sr_scpi_dev_inst *scpi, | |
506 | char *buf, int maxlen) | |
507 | { | |
508 | int ret; | |
509 | ||
510 | g_mutex_lock(&scpi->scpi_mutex); | |
511 | ret = scpi_read_data(scpi, buf, maxlen); | |
512 | g_mutex_unlock(&scpi->scpi_mutex); | |
513 | ||
514 | return ret; | |
515 | } | |
516 | ||
517 | /** | |
518 | * Send data to SCPI device. | |
519 | * | |
520 | * TODO: This is only implemented in TcpRaw, but never used. | |
521 | * TODO: Use Mutex at all? | |
522 | * | |
523 | * @param scpi Previously initialised SCPI device structure. | |
524 | * @param buf Buffer with data to send. | |
525 | * @param len Number of bytes to send. | |
526 | * | |
527 | * @return Number of bytes read, or SR_ERR upon failure. | |
528 | */ | |
529 | SR_PRIV int sr_scpi_write_data(struct sr_scpi_dev_inst *scpi, | |
530 | char *buf, int maxlen) | |
531 | { | |
532 | int ret; | |
533 | ||
534 | g_mutex_lock(&scpi->scpi_mutex); | |
535 | ret = scpi_write_data(scpi, buf, maxlen); | |
536 | g_mutex_unlock(&scpi->scpi_mutex); | |
537 | ||
538 | return ret; | |
539 | } | |
540 | ||
541 | /** | |
542 | * Check whether a complete SCPI response has been received. | |
543 | * | |
544 | * @param scpi Previously initialised SCPI device structure. | |
545 | * | |
546 | * @return 1 if complete, 0 otherwise. | |
547 | */ | |
548 | SR_PRIV int sr_scpi_read_complete(struct sr_scpi_dev_inst *scpi) | |
549 | { | |
550 | return scpi->read_complete(scpi->priv); | |
551 | } | |
552 | ||
553 | /** | |
554 | * Close SCPI device. | |
555 | * | |
556 | * @param scpi Previously initialized SCPI device structure. | |
557 | * | |
558 | * @return SR_OK on success, SR_ERR on failure. | |
559 | */ | |
560 | SR_PRIV int sr_scpi_close(struct sr_scpi_dev_inst *scpi) | |
561 | { | |
562 | int ret; | |
563 | ||
564 | g_mutex_lock(&scpi->scpi_mutex); | |
565 | ret = scpi->close(scpi); | |
566 | g_mutex_unlock(&scpi->scpi_mutex); | |
567 | g_mutex_clear(&scpi->scpi_mutex); | |
568 | ||
569 | return ret; | |
570 | } | |
571 | ||
572 | /** | |
573 | * Free SCPI device. | |
574 | * | |
575 | * @param scpi Previously initialized SCPI device structure. If NULL, | |
576 | * this function does nothing. | |
577 | */ | |
578 | SR_PRIV void sr_scpi_free(struct sr_scpi_dev_inst *scpi) | |
579 | { | |
580 | if (!scpi) | |
581 | return; | |
582 | ||
583 | scpi->free(scpi->priv); | |
584 | g_free(scpi->priv); | |
585 | g_free(scpi); | |
586 | } | |
587 | ||
588 | /** | |
589 | * Send a SCPI command, receive the reply and store the reply in scpi_response. | |
590 | * | |
591 | * @param scpi Previously initialised SCPI device structure. | |
592 | * @param command The SCPI command to send to the device (can be NULL). | |
593 | * @param scpi_response Pointer where to store the SCPI response. | |
594 | * | |
595 | * @return SR_OK on success, SR_ERR* on failure. | |
596 | */ | |
597 | SR_PRIV int sr_scpi_get_string(struct sr_scpi_dev_inst *scpi, | |
598 | const char *command, char **scpi_response) | |
599 | { | |
600 | GString *response; | |
601 | response = g_string_sized_new(1024); | |
602 | ||
603 | if (sr_scpi_get_data(scpi, command, &response) != SR_OK) { | |
604 | if (response) | |
605 | g_string_free(response, TRUE); | |
606 | return SR_ERR; | |
607 | } | |
608 | ||
609 | /* Get rid of trailing linefeed if present */ | |
610 | if (response->len >= 1 && response->str[response->len - 1] == '\n') | |
611 | g_string_truncate(response, response->len - 1); | |
612 | ||
613 | /* Get rid of trailing carriage return if present */ | |
614 | if (response->len >= 1 && response->str[response->len - 1] == '\r') | |
615 | g_string_truncate(response, response->len - 1); | |
616 | ||
617 | sr_spew("Got response: '%.70s', length %" G_GSIZE_FORMAT ".", | |
618 | response->str, response->len); | |
619 | ||
620 | *scpi_response = g_string_free(response, FALSE); | |
621 | ||
622 | return SR_OK; | |
623 | } | |
624 | ||
625 | /** | |
626 | * Do a non-blocking read of up to the allocated length, and | |
627 | * check if a timeout has occured. | |
628 | * | |
629 | * @param scpi Previously initialised SCPI device structure. | |
630 | * @param response Buffer to which the response is appended. | |
631 | * @param abs_timeout_us Absolute timeout in microseconds | |
632 | * | |
633 | * @return read length on success, SR_ERR* on failure. | |
634 | */ | |
635 | SR_PRIV int sr_scpi_read_response(struct sr_scpi_dev_inst *scpi, | |
636 | GString *response, gint64 abs_timeout_us) | |
637 | { | |
638 | int ret; | |
639 | ||
640 | g_mutex_lock(&scpi->scpi_mutex); | |
641 | ret = scpi_read_response(scpi, response, abs_timeout_us); | |
642 | g_mutex_unlock(&scpi->scpi_mutex); | |
643 | ||
644 | return ret; | |
645 | } | |
646 | ||
647 | SR_PRIV int sr_scpi_get_data(struct sr_scpi_dev_inst *scpi, | |
648 | const char *command, GString **scpi_response) | |
649 | { | |
650 | int ret; | |
651 | ||
652 | g_mutex_lock(&scpi->scpi_mutex); | |
653 | ret = scpi_get_data(scpi, command, scpi_response); | |
654 | g_mutex_unlock(&scpi->scpi_mutex); | |
655 | ||
656 | return ret; | |
657 | } | |
658 | ||
659 | /** | |
660 | * Send a SCPI command, read the reply, parse it as a bool value and store the | |
661 | * result in scpi_response. | |
662 | * | |
663 | * @param scpi Previously initialised SCPI device structure. | |
664 | * @param command The SCPI command to send to the device (can be NULL). | |
665 | * @param scpi_response Pointer where to store the parsed result. | |
666 | * | |
667 | * @return SR_OK on success, SR_ERR* on failure. | |
668 | */ | |
669 | SR_PRIV int sr_scpi_get_bool(struct sr_scpi_dev_inst *scpi, | |
670 | const char *command, gboolean *scpi_response) | |
671 | { | |
672 | int ret; | |
673 | char *response; | |
674 | ||
675 | response = NULL; | |
676 | ||
677 | ret = sr_scpi_get_string(scpi, command, &response); | |
678 | if (ret != SR_OK && !response) | |
679 | return ret; | |
680 | ||
681 | if (parse_strict_bool(response, scpi_response) == SR_OK) | |
682 | ret = SR_OK; | |
683 | else | |
684 | ret = SR_ERR_DATA; | |
685 | ||
686 | g_free(response); | |
687 | ||
688 | return ret; | |
689 | } | |
690 | ||
691 | /** | |
692 | * Send a SCPI command, read the reply, parse it as an integer and store the | |
693 | * result in scpi_response. | |
694 | * | |
695 | * @param scpi Previously initialised SCPI device structure. | |
696 | * @param command The SCPI command to send to the device (can be NULL). | |
697 | * @param scpi_response Pointer where to store the parsed result. | |
698 | * | |
699 | * @return SR_OK on success, SR_ERR* on failure. | |
700 | */ | |
701 | SR_PRIV int sr_scpi_get_int(struct sr_scpi_dev_inst *scpi, | |
702 | const char *command, int *scpi_response) | |
703 | { | |
704 | int ret; | |
705 | char *response; | |
706 | ||
707 | response = NULL; | |
708 | ||
709 | ret = sr_scpi_get_string(scpi, command, &response); | |
710 | if (ret != SR_OK && !response) | |
711 | return ret; | |
712 | ||
713 | if (sr_atoi(response, scpi_response) == SR_OK) | |
714 | ret = SR_OK; | |
715 | else | |
716 | ret = SR_ERR_DATA; | |
717 | ||
718 | g_free(response); | |
719 | ||
720 | return ret; | |
721 | } | |
722 | ||
723 | /** | |
724 | * Send a SCPI command, read the reply, parse it as a float and store the | |
725 | * result in scpi_response. | |
726 | * | |
727 | * @param scpi Previously initialised SCPI device structure. | |
728 | * @param command The SCPI command to send to the device (can be NULL). | |
729 | * @param scpi_response Pointer where to store the parsed result. | |
730 | * | |
731 | * @return SR_OK on success, SR_ERR* on failure. | |
732 | */ | |
733 | SR_PRIV int sr_scpi_get_float(struct sr_scpi_dev_inst *scpi, | |
734 | const char *command, float *scpi_response) | |
735 | { | |
736 | int ret; | |
737 | char *response; | |
738 | ||
739 | response = NULL; | |
740 | ||
741 | ret = sr_scpi_get_string(scpi, command, &response); | |
742 | if (ret != SR_OK && !response) | |
743 | return ret; | |
744 | ||
745 | if (sr_atof_ascii(response, scpi_response) == SR_OK) | |
746 | ret = SR_OK; | |
747 | else | |
748 | ret = SR_ERR_DATA; | |
749 | ||
750 | g_free(response); | |
751 | ||
752 | return ret; | |
753 | } | |
754 | ||
755 | /** | |
756 | * Send a SCPI command, read the reply, parse it as a double and store the | |
757 | * result in scpi_response. | |
758 | * | |
759 | * @param scpi Previously initialised SCPI device structure. | |
760 | * @param command The SCPI command to send to the device (can be NULL). | |
761 | * @param scpi_response Pointer where to store the parsed result. | |
762 | * | |
763 | * @return SR_OK on success, SR_ERR* on failure. | |
764 | */ | |
765 | SR_PRIV int sr_scpi_get_double(struct sr_scpi_dev_inst *scpi, | |
766 | const char *command, double *scpi_response) | |
767 | { | |
768 | int ret; | |
769 | char *response; | |
770 | ||
771 | response = NULL; | |
772 | ||
773 | ret = sr_scpi_get_string(scpi, command, &response); | |
774 | if (ret != SR_OK && !response) | |
775 | return ret; | |
776 | ||
777 | if (sr_atod_ascii(response, scpi_response) == SR_OK) | |
778 | ret = SR_OK; | |
779 | else | |
780 | ret = SR_ERR_DATA; | |
781 | ||
782 | g_free(response); | |
783 | ||
784 | return ret; | |
785 | } | |
786 | ||
787 | /** | |
788 | * Send a SCPI *OPC? command, read the reply and return the result of the | |
789 | * command. | |
790 | * | |
791 | * @param scpi Previously initialised SCPI device structure. | |
792 | * | |
793 | * @return SR_OK on success, SR_ERR* on failure. | |
794 | */ | |
795 | SR_PRIV int sr_scpi_get_opc(struct sr_scpi_dev_inst *scpi) | |
796 | { | |
797 | unsigned int i; | |
798 | gboolean opc; | |
799 | ||
800 | for (i = 0; i < SCPI_READ_RETRIES; i++) { | |
801 | opc = FALSE; | |
802 | sr_scpi_get_bool(scpi, SCPI_CMD_OPC, &opc); | |
803 | if (opc) | |
804 | return SR_OK; | |
805 | g_usleep(SCPI_READ_RETRY_TIMEOUT_US); | |
806 | } | |
807 | ||
808 | return SR_ERR; | |
809 | } | |
810 | ||
811 | /** | |
812 | * Send a SCPI command, read the reply, parse it as comma separated list of | |
813 | * floats and store the as an result in scpi_response. | |
814 | * | |
815 | * @param scpi Previously initialised SCPI device structure. | |
816 | * @param command The SCPI command to send to the device (can be NULL). | |
817 | * @param scpi_response Pointer where to store the parsed result. | |
818 | * | |
819 | * @return SR_OK upon successfully parsing all values, SR_ERR* upon a parsing | |
820 | * error or upon no response. The allocated response must be freed by | |
821 | * the caller in the case of an SR_OK as well as in the case of | |
822 | * parsing error. | |
823 | */ | |
824 | SR_PRIV int sr_scpi_get_floatv(struct sr_scpi_dev_inst *scpi, | |
825 | const char *command, GArray **scpi_response) | |
826 | { | |
827 | int ret; | |
828 | float tmp; | |
829 | char *response; | |
830 | gchar **ptr, **tokens; | |
831 | GArray *response_array; | |
832 | ||
833 | response = NULL; | |
834 | tokens = NULL; | |
835 | ||
836 | ret = sr_scpi_get_string(scpi, command, &response); | |
837 | if (ret != SR_OK && !response) | |
838 | return ret; | |
839 | ||
840 | tokens = g_strsplit(response, ",", 0); | |
841 | ptr = tokens; | |
842 | ||
843 | response_array = g_array_sized_new(TRUE, FALSE, sizeof(float), 256); | |
844 | ||
845 | while (*ptr) { | |
846 | if (sr_atof_ascii(*ptr, &tmp) == SR_OK) | |
847 | response_array = g_array_append_val(response_array, | |
848 | tmp); | |
849 | else | |
850 | ret = SR_ERR_DATA; | |
851 | ||
852 | ptr++; | |
853 | } | |
854 | g_strfreev(tokens); | |
855 | g_free(response); | |
856 | ||
857 | if (ret != SR_OK && response_array->len == 0) { | |
858 | g_array_free(response_array, TRUE); | |
859 | *scpi_response = NULL; | |
860 | return SR_ERR_DATA; | |
861 | } | |
862 | ||
863 | *scpi_response = response_array; | |
864 | ||
865 | return ret; | |
866 | } | |
867 | ||
868 | /** | |
869 | * Send a SCPI command, read the reply, parse it as comma separated list of | |
870 | * unsigned 8 bit integers and store the as an result in scpi_response. | |
871 | * | |
872 | * @param scpi Previously initialised SCPI device structure. | |
873 | * @param command The SCPI command to send to the device (can be NULL). | |
874 | * @param scpi_response Pointer where to store the parsed result. | |
875 | * | |
876 | * @return SR_OK upon successfully parsing all values, SR_ERR* upon a parsing | |
877 | * error or upon no response. The allocated response must be freed by | |
878 | * the caller in the case of an SR_OK as well as in the case of | |
879 | * parsing error. | |
880 | */ | |
881 | SR_PRIV int sr_scpi_get_uint8v(struct sr_scpi_dev_inst *scpi, | |
882 | const char *command, GArray **scpi_response) | |
883 | { | |
884 | int tmp, ret; | |
885 | char *response; | |
886 | gchar **ptr, **tokens; | |
887 | GArray *response_array; | |
888 | ||
889 | response = NULL; | |
890 | tokens = NULL; | |
891 | ||
892 | ret = sr_scpi_get_string(scpi, command, &response); | |
893 | if (ret != SR_OK && !response) | |
894 | return ret; | |
895 | ||
896 | tokens = g_strsplit(response, ",", 0); | |
897 | ptr = tokens; | |
898 | ||
899 | response_array = g_array_sized_new(TRUE, FALSE, sizeof(uint8_t), 256); | |
900 | ||
901 | while (*ptr) { | |
902 | if (sr_atoi(*ptr, &tmp) == SR_OK) | |
903 | response_array = g_array_append_val(response_array, | |
904 | tmp); | |
905 | else | |
906 | ret = SR_ERR_DATA; | |
907 | ||
908 | ptr++; | |
909 | } | |
910 | g_strfreev(tokens); | |
911 | g_free(response); | |
912 | ||
913 | if (response_array->len == 0) { | |
914 | g_array_free(response_array, TRUE); | |
915 | *scpi_response = NULL; | |
916 | return SR_ERR_DATA; | |
917 | } | |
918 | ||
919 | *scpi_response = response_array; | |
920 | ||
921 | return ret; | |
922 | } | |
923 | ||
924 | /** | |
925 | * Send a SCPI command, read the reply, parse it as binary data with a | |
926 | * "definite length block" header and store the as an result in scpi_response. | |
927 | * | |
928 | * @param scpi Previously initialised SCPI device structure. | |
929 | * @param command The SCPI command to send to the device (can be NULL). | |
930 | * @param scpi_response Pointer where to store the parsed result. | |
931 | * | |
932 | * @return SR_OK upon successfully parsing all values, SR_ERR* upon a parsing | |
933 | * error or upon no response. The allocated response must be freed by | |
934 | * the caller in the case of an SR_OK as well as in the case of | |
935 | * parsing error. | |
936 | */ | |
937 | SR_PRIV int sr_scpi_get_block(struct sr_scpi_dev_inst *scpi, | |
938 | const char *command, GByteArray **scpi_response) | |
939 | { | |
940 | int ret; | |
941 | GString* response; | |
942 | char buf[10]; | |
943 | long llen; | |
944 | long datalen; | |
945 | gint64 timeout; | |
946 | va_list empty_va_list; | |
947 | ||
948 | g_mutex_lock(&scpi->scpi_mutex); | |
949 | ||
950 | if (command) | |
951 | if (scpi_send(scpi, command, empty_va_list) != SR_OK) { | |
952 | g_mutex_unlock(&scpi->scpi_mutex); | |
953 | return SR_ERR; | |
954 | } | |
955 | ||
956 | if (sr_scpi_read_begin(scpi) != SR_OK) { | |
957 | g_mutex_unlock(&scpi->scpi_mutex); | |
958 | return SR_ERR; | |
959 | } | |
960 | ||
961 | /* | |
962 | * Assume an initial maximum length, optionally gets adjusted below. | |
963 | * Prepare a NULL return value for when error paths will be taken. | |
964 | */ | |
965 | response = g_string_sized_new(1024); | |
966 | ||
967 | timeout = g_get_monotonic_time() + scpi->read_timeout_us; | |
968 | ||
969 | *scpi_response = NULL; | |
970 | ||
971 | /* Get (the first chunk of) the response. */ | |
972 | while (response->len < 2) { | |
973 | ret = scpi_read_response(scpi, response, timeout); | |
974 | if (ret < 0) { | |
975 | g_mutex_unlock(&scpi->scpi_mutex); | |
976 | g_string_free(response, TRUE); | |
977 | return ret; | |
978 | } | |
979 | } | |
980 | ||
981 | /* | |
982 | * SCPI protocol data blocks are preceeded with a length spec. | |
983 | * The length spec consists of a '#' marker, one digit which | |
984 | * specifies the character count of the length spec, and the | |
985 | * respective number of characters which specify the data block's | |
986 | * length. Raw data bytes follow (thus one must no longer assume | |
987 | * that the received input stream would be an ASCIIZ string). | |
988 | * | |
989 | * Get the data block length, and strip off the length spec from | |
990 | * the input buffer, leaving just the data bytes. | |
991 | */ | |
992 | if (response->str[0] != '#') { | |
993 | g_mutex_unlock(&scpi->scpi_mutex); | |
994 | g_string_free(response, TRUE); | |
995 | return SR_ERR_DATA; | |
996 | } | |
997 | buf[0] = response->str[1]; | |
998 | buf[1] = '\0'; | |
999 | ret = sr_atol(buf, &llen); | |
1000 | if ((ret != SR_OK) || (llen == 0)) { | |
1001 | g_mutex_unlock(&scpi->scpi_mutex); | |
1002 | g_string_free(response, TRUE); | |
1003 | return ret; | |
1004 | } | |
1005 | ||
1006 | while (response->len < (unsigned long)(2 + llen)) { | |
1007 | ret = scpi_read_response(scpi, response, timeout); | |
1008 | if (ret < 0) { | |
1009 | g_mutex_unlock(&scpi->scpi_mutex); | |
1010 | g_string_free(response, TRUE); | |
1011 | return ret; | |
1012 | } | |
1013 | } | |
1014 | ||
1015 | memcpy(buf, &response->str[2], llen); | |
1016 | buf[llen] = '\0'; | |
1017 | ret = sr_atol(buf, &datalen); | |
1018 | if ((ret != SR_OK) || (datalen == 0)) { | |
1019 | g_mutex_unlock(&scpi->scpi_mutex); | |
1020 | g_string_free(response, TRUE); | |
1021 | return ret; | |
1022 | } | |
1023 | g_string_erase(response, 0, 2 + llen); | |
1024 | ||
1025 | /* | |
1026 | * If the initially assumed length does not cover the data block | |
1027 | * length, then re-allocate the buffer size to the now known | |
1028 | * length, and keep reading more chunks of response data. | |
1029 | */ | |
1030 | if (response->len < (unsigned long)(datalen)) { | |
1031 | int oldlen = response->len; | |
1032 | g_string_set_size(response, datalen); | |
1033 | g_string_set_size(response, oldlen); | |
1034 | } | |
1035 | ||
1036 | while (response->len < (unsigned long)(datalen)) { | |
1037 | ret = scpi_read_response(scpi, response, timeout); | |
1038 | if (ret < 0) { | |
1039 | g_mutex_unlock(&scpi->scpi_mutex); | |
1040 | g_string_free(response, TRUE); | |
1041 | return ret; | |
1042 | } | |
1043 | if (ret > 0) | |
1044 | timeout = g_get_monotonic_time() + scpi->read_timeout_us; | |
1045 | } | |
1046 | ||
1047 | g_mutex_unlock(&scpi->scpi_mutex); | |
1048 | ||
1049 | /* Convert received data to byte array. */ | |
1050 | *scpi_response = g_byte_array_new_take( | |
1051 | (guint8*)g_string_free(response, FALSE), datalen); | |
1052 | ||
1053 | return SR_OK; | |
1054 | } | |
1055 | ||
1056 | /** | |
1057 | * Send the *IDN? SCPI command, receive the reply, parse it and store the | |
1058 | * reply as a sr_scpi_hw_info structure in the supplied scpi_response pointer. | |
1059 | * | |
1060 | * The hw_info structure must be freed by the caller via sr_scpi_hw_info_free(). | |
1061 | * | |
1062 | * @param scpi Previously initialised SCPI device structure. | |
1063 | * @param scpi_response Pointer where to store the hw_info structure. | |
1064 | * | |
1065 | * @return SR_OK upon success, SR_ERR* on failure. | |
1066 | */ | |
1067 | SR_PRIV int sr_scpi_get_hw_id(struct sr_scpi_dev_inst *scpi, | |
1068 | struct sr_scpi_hw_info **scpi_response) | |
1069 | { | |
1070 | int num_tokens, ret; | |
1071 | char *response; | |
1072 | gchar **tokens; | |
1073 | struct sr_scpi_hw_info *hw_info; | |
1074 | gchar *idn_substr; | |
1075 | ||
1076 | response = NULL; | |
1077 | tokens = NULL; | |
1078 | ||
1079 | ret = sr_scpi_get_string(scpi, SCPI_CMD_IDN, &response); | |
1080 | if (ret != SR_OK && !response) | |
1081 | return ret; | |
1082 | ||
1083 | /* | |
1084 | * The response to a '*IDN?' is specified by the SCPI spec. It contains | |
1085 | * a comma-separated list containing the manufacturer name, instrument | |
1086 | * model, serial number of the instrument and the firmware version. | |
1087 | */ | |
1088 | tokens = g_strsplit(response, ",", 0); | |
1089 | ||
1090 | for (num_tokens = 0; tokens[num_tokens] != NULL; num_tokens++); | |
1091 | ||
1092 | if (num_tokens < 4) { | |
1093 | sr_dbg("IDN response not according to spec: %80.s.", response); | |
1094 | g_strfreev(tokens); | |
1095 | g_free(response); | |
1096 | return SR_ERR_DATA; | |
1097 | } | |
1098 | g_free(response); | |
1099 | ||
1100 | hw_info = g_malloc0(sizeof(struct sr_scpi_hw_info)); | |
1101 | ||
1102 | idn_substr = g_strstr_len(tokens[0], -1, "IDN "); | |
1103 | if (idn_substr == NULL) | |
1104 | hw_info->manufacturer = g_strstrip(g_strdup(tokens[0])); | |
1105 | else | |
1106 | hw_info->manufacturer = g_strstrip(g_strdup(idn_substr + 4)); | |
1107 | ||
1108 | hw_info->model = g_strstrip(g_strdup(tokens[1])); | |
1109 | hw_info->serial_number = g_strstrip(g_strdup(tokens[2])); | |
1110 | hw_info->firmware_version = g_strstrip(g_strdup(tokens[3])); | |
1111 | ||
1112 | g_strfreev(tokens); | |
1113 | ||
1114 | *scpi_response = hw_info; | |
1115 | ||
1116 | return SR_OK; | |
1117 | } | |
1118 | ||
1119 | /** | |
1120 | * Free a sr_scpi_hw_info struct. | |
1121 | * | |
1122 | * @param hw_info Pointer to the struct to free. If NULL, this | |
1123 | * function does nothing. | |
1124 | */ | |
1125 | SR_PRIV void sr_scpi_hw_info_free(struct sr_scpi_hw_info *hw_info) | |
1126 | { | |
1127 | if (!hw_info) | |
1128 | return; | |
1129 | ||
1130 | g_free(hw_info->manufacturer); | |
1131 | g_free(hw_info->model); | |
1132 | g_free(hw_info->serial_number); | |
1133 | g_free(hw_info->firmware_version); | |
1134 | g_free(hw_info); | |
1135 | } | |
1136 | ||
1137 | SR_PRIV const char *sr_vendor_alias(const char *raw_vendor) | |
1138 | { | |
1139 | unsigned int i; | |
1140 | ||
1141 | for (i = 0; i < ARRAY_SIZE(scpi_vendors); i++) { | |
1142 | if (!g_ascii_strcasecmp(raw_vendor, scpi_vendors[i][0])) | |
1143 | return scpi_vendors[i][1]; | |
1144 | } | |
1145 | ||
1146 | return raw_vendor; | |
1147 | } | |
1148 | ||
1149 | SR_PRIV const char *sr_scpi_cmd_get(const struct scpi_command *cmdtable, int command) | |
1150 | { | |
1151 | unsigned int i; | |
1152 | const char *cmd; | |
1153 | ||
1154 | if (!cmdtable) | |
1155 | return NULL; | |
1156 | ||
1157 | cmd = NULL; | |
1158 | for (i = 0; cmdtable[i].string; i++) { | |
1159 | if (cmdtable[i].command == command) { | |
1160 | cmd = cmdtable[i].string; | |
1161 | break; | |
1162 | } | |
1163 | } | |
1164 | ||
1165 | return cmd; | |
1166 | } | |
1167 | ||
1168 | SR_PRIV int sr_scpi_cmd(const struct sr_dev_inst *sdi, const struct scpi_command *cmdtable, | |
1169 | int command, ...) | |
1170 | { | |
1171 | struct sr_scpi_dev_inst *scpi; | |
1172 | va_list args; | |
1173 | int ret; | |
1174 | const char *cmd; | |
1175 | ||
1176 | if (!(cmd = sr_scpi_cmd_get(cmdtable, command))) { | |
1177 | /* Device does not implement this command, that's OK. */ | |
1178 | return SR_OK; | |
1179 | } | |
1180 | ||
1181 | scpi = sdi->conn; | |
1182 | va_start(args, command); | |
1183 | ret = sr_scpi_send_variadic(scpi, cmd, args); | |
1184 | va_end(args); | |
1185 | ||
1186 | return ret; | |
1187 | } | |
1188 | ||
1189 | SR_PRIV int sr_scpi_cmd_resp(const struct sr_dev_inst *sdi, | |
1190 | const struct scpi_command *cmdtable, | |
1191 | GVariant **gvar, const GVariantType *gvtype, int command, ...) | |
1192 | { | |
1193 | struct sr_scpi_dev_inst *scpi; | |
1194 | va_list args; | |
1195 | const char *cmd; | |
1196 | GString *response; | |
1197 | char *s; | |
1198 | gboolean b; | |
1199 | double d; | |
1200 | int ret; | |
1201 | ||
1202 | scpi = sdi->conn; | |
1203 | ||
1204 | if (!(cmd = sr_scpi_cmd_get(cmdtable, command))) { | |
1205 | /* Device does not implement this command. */ | |
1206 | return SR_ERR_NA; | |
1207 | } | |
1208 | ||
1209 | g_mutex_lock(&scpi->scpi_mutex); | |
1210 | ||
1211 | va_start(args, command); | |
1212 | ret = scpi_send_variadic(scpi, cmd, args); | |
1213 | va_end(args); | |
1214 | if (ret != SR_OK) { | |
1215 | g_mutex_unlock(&scpi->scpi_mutex); | |
1216 | return ret; | |
1217 | } | |
1218 | ||
1219 | response = g_string_sized_new(1024); | |
1220 | ret = scpi_get_data(scpi, NULL, &response); | |
1221 | if (ret != SR_OK) { | |
1222 | g_mutex_unlock(&scpi->scpi_mutex); | |
1223 | if (response) | |
1224 | g_string_free(response, TRUE); | |
1225 | return ret; | |
1226 | } | |
1227 | ||
1228 | g_mutex_unlock(&scpi->scpi_mutex); | |
1229 | ||
1230 | /* Get rid of trailing linefeed if present */ | |
1231 | if (response->len >= 1 && response->str[response->len - 1] == '\n') | |
1232 | g_string_truncate(response, response->len - 1); | |
1233 | ||
1234 | /* Get rid of trailing carriage return if present */ | |
1235 | if (response->len >= 1 && response->str[response->len - 1] == '\r') | |
1236 | g_string_truncate(response, response->len - 1); | |
1237 | ||
1238 | s = g_string_free(response, FALSE); | |
1239 | ||
1240 | ret = SR_OK; | |
1241 | if (g_variant_type_equal(gvtype, G_VARIANT_TYPE_BOOLEAN)) { | |
1242 | if ((ret = parse_strict_bool(s, &b)) == SR_OK) | |
1243 | *gvar = g_variant_new_boolean(b); | |
1244 | } else if (g_variant_type_equal(gvtype, G_VARIANT_TYPE_DOUBLE)) { | |
1245 | if ((ret = sr_atod_ascii(s, &d)) == SR_OK) | |
1246 | *gvar = g_variant_new_double(d); | |
1247 | } else if (g_variant_type_equal(gvtype, G_VARIANT_TYPE_STRING)) { | |
1248 | *gvar = g_variant_new_string(s); | |
1249 | } else { | |
1250 | sr_err("Unable to convert to desired GVariant type."); | |
1251 | ret = SR_ERR_NA; | |
1252 | } | |
1253 | ||
1254 | g_free(s); | |
1255 | ||
1256 | return ret; | |
1257 | } |