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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 | * | |
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 <config.h> | |
21 | #include <glib.h> | |
22 | #include <string.h> | |
23 | #include <libsigrok/libsigrok.h> | |
24 | #include "libsigrok-internal.h" | |
25 | #include "scpi.h" | |
26 | ||
27 | #define LOG_PREFIX "scpi" | |
28 | ||
29 | #define SCPI_READ_RETRIES 100 | |
30 | #define SCPI_READ_RETRY_TIMEOUT_US (10 * 1000) | |
31 | ||
32 | /** | |
33 | * Parse a string representation of a boolean-like value into a gboolean. | |
34 | * Similar to sr_parse_boolstring but rejects strings which do not represent | |
35 | * a boolean-like value. | |
36 | * | |
37 | * @param str String to convert. | |
38 | * @param ret Pointer to a gboolean where the result of the conversion will be | |
39 | * stored. | |
40 | * | |
41 | * @return SR_OK on success, SR_ERR on failure. | |
42 | */ | |
43 | static int parse_strict_bool(const char *str, gboolean *ret) | |
44 | { | |
45 | if (!str) | |
46 | return SR_ERR_ARG; | |
47 | ||
48 | if (!g_strcmp0(str, "1") || | |
49 | !g_ascii_strncasecmp(str, "y", 1) || | |
50 | !g_ascii_strncasecmp(str, "t", 1) || | |
51 | !g_ascii_strncasecmp(str, "yes", 3) || | |
52 | !g_ascii_strncasecmp(str, "true", 4) || | |
53 | !g_ascii_strncasecmp(str, "on", 2)) { | |
54 | *ret = TRUE; | |
55 | return SR_OK; | |
56 | } else if (!g_strcmp0(str, "0") || | |
57 | !g_ascii_strncasecmp(str, "n", 1) || | |
58 | !g_ascii_strncasecmp(str, "f", 1) || | |
59 | !g_ascii_strncasecmp(str, "no", 2) || | |
60 | !g_ascii_strncasecmp(str, "false", 5) || | |
61 | !g_ascii_strncasecmp(str, "off", 3)) { | |
62 | *ret = FALSE; | |
63 | return SR_OK; | |
64 | } | |
65 | ||
66 | return SR_ERR; | |
67 | } | |
68 | ||
69 | SR_PRIV extern const struct sr_scpi_dev_inst scpi_serial_dev; | |
70 | SR_PRIV extern const struct sr_scpi_dev_inst scpi_tcp_raw_dev; | |
71 | SR_PRIV extern const struct sr_scpi_dev_inst scpi_tcp_rigol_dev; | |
72 | SR_PRIV extern const struct sr_scpi_dev_inst scpi_usbtmc_libusb_dev; | |
73 | SR_PRIV extern const struct sr_scpi_dev_inst scpi_vxi_dev; | |
74 | SR_PRIV extern const struct sr_scpi_dev_inst scpi_visa_dev; | |
75 | SR_PRIV extern const struct sr_scpi_dev_inst scpi_libgpib_dev; | |
76 | ||
77 | static const struct sr_scpi_dev_inst *scpi_devs[] = { | |
78 | &scpi_tcp_raw_dev, | |
79 | &scpi_tcp_rigol_dev, | |
80 | #ifdef HAVE_LIBUSB_1_0 | |
81 | &scpi_usbtmc_libusb_dev, | |
82 | #endif | |
83 | #if HAVE_RPC | |
84 | &scpi_vxi_dev, | |
85 | #endif | |
86 | #ifdef HAVE_LIBREVISA | |
87 | &scpi_visa_dev, | |
88 | #endif | |
89 | #ifdef HAVE_LIBGPIB | |
90 | &scpi_libgpib_dev, | |
91 | #endif | |
92 | #ifdef HAVE_LIBSERIALPORT | |
93 | &scpi_serial_dev, /* must be last as it matches any resource */ | |
94 | #endif | |
95 | }; | |
96 | ||
97 | static struct sr_dev_inst *sr_scpi_scan_resource(struct drv_context *drvc, | |
98 | const char *resource, const char *serialcomm, | |
99 | struct sr_dev_inst *(*probe_device)(struct sr_scpi_dev_inst *scpi)) | |
100 | { | |
101 | struct sr_scpi_dev_inst *scpi; | |
102 | struct sr_dev_inst *sdi; | |
103 | ||
104 | if (!(scpi = scpi_dev_inst_new(drvc, resource, serialcomm))) | |
105 | return NULL; | |
106 | ||
107 | if (sr_scpi_open(scpi) != SR_OK) { | |
108 | sr_info("Couldn't open SCPI device."); | |
109 | sr_scpi_free(scpi); | |
110 | return NULL; | |
111 | }; | |
112 | ||
113 | if ((sdi = probe_device(scpi))) | |
114 | return sdi; | |
115 | ||
116 | sr_scpi_close(scpi); | |
117 | sr_scpi_free(scpi); | |
118 | return NULL; | |
119 | } | |
120 | ||
121 | SR_PRIV GSList *sr_scpi_scan(struct drv_context *drvc, GSList *options, | |
122 | struct sr_dev_inst *(*probe_device)(struct sr_scpi_dev_inst *scpi)) | |
123 | { | |
124 | GSList *resources, *l, *devices; | |
125 | struct sr_dev_inst *sdi; | |
126 | const char *resource = NULL; | |
127 | const char *serialcomm = NULL; | |
128 | gchar **res; | |
129 | unsigned i; | |
130 | ||
131 | for (l = options; l; l = l->next) { | |
132 | struct sr_config *src = l->data; | |
133 | switch (src->key) { | |
134 | case SR_CONF_CONN: | |
135 | resource = g_variant_get_string(src->data, NULL); | |
136 | break; | |
137 | case SR_CONF_SERIALCOMM: | |
138 | serialcomm = g_variant_get_string(src->data, NULL); | |
139 | break; | |
140 | } | |
141 | } | |
142 | ||
143 | devices = NULL; | |
144 | for (i = 0; i < ARRAY_SIZE(scpi_devs); i++) { | |
145 | if ((resource && strcmp(resource, scpi_devs[i]->prefix)) | |
146 | || !scpi_devs[i]->scan) | |
147 | continue; | |
148 | resources = scpi_devs[i]->scan(drvc); | |
149 | for (l = resources; l; l = l->next) { | |
150 | res = g_strsplit(l->data, ":", 2); | |
151 | if (res[0] && (sdi = sr_scpi_scan_resource(drvc, res[0], | |
152 | serialcomm ? serialcomm : res[1], probe_device))) { | |
153 | devices = g_slist_append(devices, sdi); | |
154 | sdi->connection_id = g_strdup(l->data); | |
155 | } | |
156 | g_strfreev(res); | |
157 | } | |
158 | g_slist_free_full(resources, g_free); | |
159 | } | |
160 | ||
161 | if (!devices && resource) { | |
162 | sdi = sr_scpi_scan_resource(drvc, resource, serialcomm, probe_device); | |
163 | if (sdi) | |
164 | devices = g_slist_append(NULL, sdi); | |
165 | } | |
166 | ||
167 | /* Tack a copy of the newly found devices onto the driver list. */ | |
168 | if (devices) | |
169 | drvc->instances = g_slist_concat(drvc->instances, g_slist_copy(devices)); | |
170 | ||
171 | return devices; | |
172 | } | |
173 | ||
174 | SR_PRIV struct sr_scpi_dev_inst *scpi_dev_inst_new(struct drv_context *drvc, | |
175 | const char *resource, const char *serialcomm) | |
176 | { | |
177 | struct sr_scpi_dev_inst *scpi = NULL; | |
178 | const struct sr_scpi_dev_inst *scpi_dev; | |
179 | gchar **params; | |
180 | unsigned i; | |
181 | ||
182 | for (i = 0; i < ARRAY_SIZE(scpi_devs); i++) { | |
183 | scpi_dev = scpi_devs[i]; | |
184 | if (!strncmp(resource, scpi_dev->prefix, strlen(scpi_dev->prefix))) { | |
185 | sr_dbg("Opening %s device %s.", scpi_dev->name, resource); | |
186 | scpi = g_malloc(sizeof(*scpi)); | |
187 | *scpi = *scpi_dev; | |
188 | scpi->priv = g_malloc0(scpi->priv_size); | |
189 | scpi->read_timeout_ms = 1000; | |
190 | params = g_strsplit(resource, "/", 0); | |
191 | if (scpi->dev_inst_new(scpi->priv, drvc, resource, | |
192 | params, serialcomm) != SR_OK) { | |
193 | sr_scpi_free(scpi); | |
194 | scpi = NULL; | |
195 | } | |
196 | g_strfreev(params); | |
197 | break; | |
198 | } | |
199 | } | |
200 | ||
201 | return scpi; | |
202 | } | |
203 | ||
204 | /** | |
205 | * Open SCPI device. | |
206 | * | |
207 | * @param scpi Previously initialized SCPI device structure. | |
208 | * | |
209 | * @return SR_OK on success, SR_ERR on failure. | |
210 | */ | |
211 | SR_PRIV int sr_scpi_open(struct sr_scpi_dev_inst *scpi) | |
212 | { | |
213 | return scpi->open(scpi); | |
214 | } | |
215 | ||
216 | /** | |
217 | * Add an event source for an SCPI device. | |
218 | * | |
219 | * @param session The session to add the event source to. | |
220 | * @param scpi Previously initialized SCPI device structure. | |
221 | * @param events Events to check for. | |
222 | * @param timeout Max time to wait before the callback is called, ignored if 0. | |
223 | * @param cb Callback function to add. Must not be NULL. | |
224 | * @param cb_data Data for the callback function. Can be NULL. | |
225 | * | |
226 | * @return SR_OK upon success, SR_ERR_ARG upon invalid arguments, or | |
227 | * SR_ERR_MALLOC upon memory allocation errors. | |
228 | */ | |
229 | SR_PRIV int sr_scpi_source_add(struct sr_session *session, | |
230 | struct sr_scpi_dev_inst *scpi, int events, int timeout, | |
231 | sr_receive_data_callback cb, void *cb_data) | |
232 | { | |
233 | return scpi->source_add(session, scpi->priv, events, timeout, cb, cb_data); | |
234 | } | |
235 | ||
236 | /** | |
237 | * Remove event source for an SCPI device. | |
238 | * | |
239 | * @param session The session to remove the event source from. | |
240 | * @param scpi Previously initialized SCPI device structure. | |
241 | * | |
242 | * @return SR_OK upon success, SR_ERR_ARG upon invalid arguments, or | |
243 | * SR_ERR_MALLOC upon memory allocation errors, SR_ERR_BUG upon | |
244 | * internal errors. | |
245 | */ | |
246 | SR_PRIV int sr_scpi_source_remove(struct sr_session *session, | |
247 | struct sr_scpi_dev_inst *scpi) | |
248 | { | |
249 | return scpi->source_remove(session, scpi->priv); | |
250 | } | |
251 | ||
252 | /** | |
253 | * Send a SCPI command. | |
254 | * | |
255 | * @param scpi Previously initialized SCPI device structure. | |
256 | * @param format Format string, to be followed by any necessary arguments. | |
257 | * | |
258 | * @return SR_OK on success, SR_ERR on failure. | |
259 | */ | |
260 | SR_PRIV int sr_scpi_send(struct sr_scpi_dev_inst *scpi, | |
261 | const char *format, ...) | |
262 | { | |
263 | va_list args; | |
264 | int ret; | |
265 | ||
266 | va_start(args, format); | |
267 | ret = sr_scpi_send_variadic(scpi, format, args); | |
268 | va_end(args); | |
269 | ||
270 | return ret; | |
271 | } | |
272 | ||
273 | /** | |
274 | * Send a SCPI command with a variadic argument list. | |
275 | * | |
276 | * @param scpi Previously initialized SCPI device structure. | |
277 | * @param format Format string. | |
278 | * @param args Argument list. | |
279 | * | |
280 | * @return SR_OK on success, SR_ERR on failure. | |
281 | */ | |
282 | SR_PRIV int sr_scpi_send_variadic(struct sr_scpi_dev_inst *scpi, | |
283 | const char *format, va_list args) | |
284 | { | |
285 | va_list args_copy; | |
286 | char *buf; | |
287 | int len, ret; | |
288 | ||
289 | /* Get length of buffer required. */ | |
290 | va_copy(args_copy, args); | |
291 | len = vsnprintf(NULL, 0, format, args_copy); | |
292 | va_end(args_copy); | |
293 | ||
294 | /* Allocate buffer and write out command. */ | |
295 | buf = g_malloc(len + 1); | |
296 | vsprintf(buf, format, args); | |
297 | ||
298 | /* Send command. */ | |
299 | ret = scpi->send(scpi->priv, buf); | |
300 | ||
301 | /* Free command buffer. */ | |
302 | g_free(buf); | |
303 | ||
304 | return ret; | |
305 | } | |
306 | ||
307 | /** | |
308 | * Begin receiving an SCPI reply. | |
309 | * | |
310 | * @param scpi Previously initialised SCPI device structure. | |
311 | * | |
312 | * @return SR_OK on success, SR_ERR on failure. | |
313 | */ | |
314 | SR_PRIV int sr_scpi_read_begin(struct sr_scpi_dev_inst *scpi) | |
315 | { | |
316 | return scpi->read_begin(scpi->priv); | |
317 | } | |
318 | ||
319 | /** | |
320 | * Read part of a response from SCPI device. | |
321 | * | |
322 | * @param scpi Previously initialised SCPI device structure. | |
323 | * @param buf Buffer to store result. | |
324 | * @param maxlen Maximum number of bytes to read. | |
325 | * | |
326 | * @return Number of bytes read, or SR_ERR upon failure. | |
327 | */ | |
328 | SR_PRIV int sr_scpi_read_data(struct sr_scpi_dev_inst *scpi, | |
329 | char *buf, int maxlen) | |
330 | { | |
331 | return scpi->read_data(scpi->priv, buf, maxlen); | |
332 | } | |
333 | ||
334 | /** | |
335 | * Check whether a complete SCPI response has been received. | |
336 | * | |
337 | * @param scpi Previously initialised SCPI device structure. | |
338 | * | |
339 | * @return 1 if complete, 0 otherwise. | |
340 | */ | |
341 | SR_PRIV int sr_scpi_read_complete(struct sr_scpi_dev_inst *scpi) | |
342 | { | |
343 | return scpi->read_complete(scpi->priv); | |
344 | } | |
345 | ||
346 | /** | |
347 | * Close SCPI device. | |
348 | * | |
349 | * @param scpi Previously initialized SCPI device structure. | |
350 | * | |
351 | * @return SR_OK on success, SR_ERR on failure. | |
352 | */ | |
353 | SR_PRIV int sr_scpi_close(struct sr_scpi_dev_inst *scpi) | |
354 | { | |
355 | return scpi->close(scpi); | |
356 | } | |
357 | ||
358 | /** | |
359 | * Free SCPI device. | |
360 | * | |
361 | * @param scpi Previously initialized SCPI device structure. | |
362 | * | |
363 | * @return SR_OK on success, SR_ERR on failure. | |
364 | */ | |
365 | SR_PRIV void sr_scpi_free(struct sr_scpi_dev_inst *scpi) | |
366 | { | |
367 | scpi->free(scpi->priv); | |
368 | g_free(scpi->priv); | |
369 | g_free(scpi); | |
370 | } | |
371 | ||
372 | /** | |
373 | * Send a SCPI command, receive the reply and store the reply in scpi_response. | |
374 | * | |
375 | * @param scpi Previously initialised SCPI device structure. | |
376 | * @param command The SCPI command to send to the device (can be NULL). | |
377 | * @param scpi_response Pointer where to store the SCPI response. | |
378 | * | |
379 | * @return SR_OK on success, SR_ERR* on failure. | |
380 | */ | |
381 | SR_PRIV int sr_scpi_get_string(struct sr_scpi_dev_inst *scpi, | |
382 | const char *command, char **scpi_response) | |
383 | { | |
384 | char buf[256]; | |
385 | int len; | |
386 | GString *response; | |
387 | gint64 laststart; | |
388 | unsigned int elapsed_ms; | |
389 | ||
390 | if (command) | |
391 | if (sr_scpi_send(scpi, command) != SR_OK) | |
392 | return SR_ERR; | |
393 | ||
394 | if (sr_scpi_read_begin(scpi) != SR_OK) | |
395 | return SR_ERR; | |
396 | ||
397 | laststart = g_get_monotonic_time(); | |
398 | ||
399 | response = g_string_new(""); | |
400 | ||
401 | *scpi_response = NULL; | |
402 | ||
403 | while (!sr_scpi_read_complete(scpi)) { | |
404 | len = sr_scpi_read_data(scpi, buf, sizeof(buf)); | |
405 | if (len < 0) { | |
406 | sr_err("Incompletely read SCPI response."); | |
407 | g_string_free(response, TRUE); | |
408 | return SR_ERR; | |
409 | } else if (len > 0) { | |
410 | laststart = g_get_monotonic_time(); | |
411 | } | |
412 | g_string_append_len(response, buf, len); | |
413 | elapsed_ms = (g_get_monotonic_time() - laststart) / 1000; | |
414 | if (elapsed_ms >= scpi->read_timeout_ms) { | |
415 | sr_err("Timed out waiting for SCPI response."); | |
416 | g_string_free(response, TRUE); | |
417 | return SR_ERR; | |
418 | } | |
419 | } | |
420 | ||
421 | /* Get rid of trailing linefeed if present */ | |
422 | if (response->len >= 1 && response->str[response->len - 1] == '\n') | |
423 | g_string_truncate(response, response->len - 1); | |
424 | ||
425 | /* Get rid of trailing carriage return if present */ | |
426 | if (response->len >= 1 && response->str[response->len - 1] == '\r') | |
427 | g_string_truncate(response, response->len - 1); | |
428 | ||
429 | sr_spew("Got response: '%.70s', length %" G_GSIZE_FORMAT ".", | |
430 | response->str, response->len); | |
431 | ||
432 | *scpi_response = g_string_free(response, FALSE); | |
433 | ||
434 | return SR_OK; | |
435 | } | |
436 | ||
437 | /** | |
438 | * Send a SCPI command, read the reply, parse it as a bool value and store the | |
439 | * result in scpi_response. | |
440 | * | |
441 | * @param scpi Previously initialised SCPI device structure. | |
442 | * @param command The SCPI command to send to the device (can be NULL). | |
443 | * @param scpi_response Pointer where to store the parsed result. | |
444 | * | |
445 | * @return SR_OK on success, SR_ERR* on failure. | |
446 | */ | |
447 | SR_PRIV int sr_scpi_get_bool(struct sr_scpi_dev_inst *scpi, | |
448 | const char *command, gboolean *scpi_response) | |
449 | { | |
450 | int ret; | |
451 | char *response; | |
452 | ||
453 | response = NULL; | |
454 | ||
455 | ret = sr_scpi_get_string(scpi, command, &response); | |
456 | if (ret != SR_OK && !response) | |
457 | return ret; | |
458 | ||
459 | if (parse_strict_bool(response, scpi_response) == SR_OK) | |
460 | ret = SR_OK; | |
461 | else | |
462 | ret = SR_ERR_DATA; | |
463 | ||
464 | g_free(response); | |
465 | ||
466 | return ret; | |
467 | } | |
468 | ||
469 | /** | |
470 | * Send a SCPI command, read the reply, parse it as an integer and store the | |
471 | * result in scpi_response. | |
472 | * | |
473 | * @param scpi Previously initialised SCPI device structure. | |
474 | * @param command The SCPI command to send to the device (can be NULL). | |
475 | * @param scpi_response Pointer where to store the parsed result. | |
476 | * | |
477 | * @return SR_OK on success, SR_ERR* on failure. | |
478 | */ | |
479 | SR_PRIV int sr_scpi_get_int(struct sr_scpi_dev_inst *scpi, | |
480 | const char *command, int *scpi_response) | |
481 | { | |
482 | int ret; | |
483 | char *response; | |
484 | ||
485 | response = NULL; | |
486 | ||
487 | ret = sr_scpi_get_string(scpi, command, &response); | |
488 | if (ret != SR_OK && !response) | |
489 | return ret; | |
490 | ||
491 | if (sr_atoi(response, scpi_response) == SR_OK) | |
492 | ret = SR_OK; | |
493 | else | |
494 | ret = SR_ERR_DATA; | |
495 | ||
496 | g_free(response); | |
497 | ||
498 | return ret; | |
499 | } | |
500 | ||
501 | /** | |
502 | * Send a SCPI command, read the reply, parse it as a float and store the | |
503 | * result in scpi_response. | |
504 | * | |
505 | * @param scpi Previously initialised SCPI device structure. | |
506 | * @param command The SCPI command to send to the device (can be NULL). | |
507 | * @param scpi_response Pointer where to store the parsed result. | |
508 | * | |
509 | * @return SR_OK on success, SR_ERR* on failure. | |
510 | */ | |
511 | SR_PRIV int sr_scpi_get_float(struct sr_scpi_dev_inst *scpi, | |
512 | const char *command, float *scpi_response) | |
513 | { | |
514 | int ret; | |
515 | char *response; | |
516 | ||
517 | response = NULL; | |
518 | ||
519 | ret = sr_scpi_get_string(scpi, command, &response); | |
520 | if (ret != SR_OK && !response) | |
521 | return ret; | |
522 | ||
523 | if (sr_atof_ascii(response, scpi_response) == SR_OK) | |
524 | ret = SR_OK; | |
525 | else | |
526 | ret = SR_ERR_DATA; | |
527 | ||
528 | g_free(response); | |
529 | ||
530 | return ret; | |
531 | } | |
532 | ||
533 | /** | |
534 | * Send a SCPI command, read the reply, parse it as a double and store the | |
535 | * result in scpi_response. | |
536 | * | |
537 | * @param scpi Previously initialised SCPI device structure. | |
538 | * @param command The SCPI command to send to the device (can be NULL). | |
539 | * @param scpi_response Pointer where to store the parsed result. | |
540 | * | |
541 | * @return SR_OK on success, SR_ERR* on failure. | |
542 | */ | |
543 | SR_PRIV int sr_scpi_get_double(struct sr_scpi_dev_inst *scpi, | |
544 | const char *command, double *scpi_response) | |
545 | { | |
546 | int ret; | |
547 | char *response; | |
548 | ||
549 | response = NULL; | |
550 | ||
551 | ret = sr_scpi_get_string(scpi, command, &response); | |
552 | if (ret != SR_OK && !response) | |
553 | return ret; | |
554 | ||
555 | if (sr_atod(response, scpi_response) == SR_OK) | |
556 | ret = SR_OK; | |
557 | else | |
558 | ret = SR_ERR_DATA; | |
559 | ||
560 | g_free(response); | |
561 | ||
562 | return ret; | |
563 | } | |
564 | ||
565 | /** | |
566 | * Send a SCPI *OPC? command, read the reply and return the result of the | |
567 | * command. | |
568 | * | |
569 | * @param scpi Previously initialised SCPI device structure. | |
570 | * | |
571 | * @return SR_OK on success, SR_ERR* on failure. | |
572 | */ | |
573 | SR_PRIV int sr_scpi_get_opc(struct sr_scpi_dev_inst *scpi) | |
574 | { | |
575 | unsigned int i; | |
576 | gboolean opc; | |
577 | ||
578 | for (i = 0; i < SCPI_READ_RETRIES; ++i) { | |
579 | sr_scpi_get_bool(scpi, SCPI_CMD_OPC, &opc); | |
580 | if (opc) | |
581 | return SR_OK; | |
582 | g_usleep(SCPI_READ_RETRY_TIMEOUT_US); | |
583 | } | |
584 | ||
585 | return SR_ERR; | |
586 | } | |
587 | ||
588 | /** | |
589 | * Send a SCPI command, read the reply, parse it as comma separated list of | |
590 | * floats and store the as an result in scpi_response. | |
591 | * | |
592 | * @param scpi Previously initialised SCPI device structure. | |
593 | * @param command The SCPI command to send to the device (can be NULL). | |
594 | * @param scpi_response Pointer where to store the parsed result. | |
595 | * | |
596 | * @return SR_OK upon successfully parsing all values, SR_ERR* upon a parsing | |
597 | * error or upon no response. The allocated response must be freed by | |
598 | * the caller in the case of an SR_OK as well as in the case of | |
599 | * parsing error. | |
600 | */ | |
601 | SR_PRIV int sr_scpi_get_floatv(struct sr_scpi_dev_inst *scpi, | |
602 | const char *command, GArray **scpi_response) | |
603 | { | |
604 | int ret; | |
605 | float tmp; | |
606 | char *response; | |
607 | gchar **ptr, **tokens; | |
608 | GArray *response_array; | |
609 | ||
610 | response = NULL; | |
611 | tokens = NULL; | |
612 | ||
613 | ret = sr_scpi_get_string(scpi, command, &response); | |
614 | if (ret != SR_OK && !response) | |
615 | return ret; | |
616 | ||
617 | tokens = g_strsplit(response, ",", 0); | |
618 | ptr = tokens; | |
619 | ||
620 | response_array = g_array_sized_new(TRUE, FALSE, sizeof(float), 256); | |
621 | ||
622 | while (*ptr) { | |
623 | if (sr_atof_ascii(*ptr, &tmp) == SR_OK) | |
624 | response_array = g_array_append_val(response_array, | |
625 | tmp); | |
626 | else | |
627 | ret = SR_ERR_DATA; | |
628 | ||
629 | ptr++; | |
630 | } | |
631 | g_strfreev(tokens); | |
632 | g_free(response); | |
633 | ||
634 | if (ret != SR_OK && response_array->len == 0) { | |
635 | g_array_free(response_array, TRUE); | |
636 | *scpi_response = NULL; | |
637 | return SR_ERR_DATA; | |
638 | } | |
639 | ||
640 | *scpi_response = response_array; | |
641 | ||
642 | return ret; | |
643 | } | |
644 | ||
645 | /** | |
646 | * Send a SCPI command, read the reply, parse it as comma separated list of | |
647 | * unsigned 8 bit integers and store the as an result in scpi_response. | |
648 | * | |
649 | * @param scpi Previously initialised SCPI device structure. | |
650 | * @param command The SCPI command to send to the device (can be NULL). | |
651 | * @param scpi_response Pointer where to store the parsed result. | |
652 | * | |
653 | * @return SR_OK upon successfully parsing all values, SR_ERR* upon a parsing | |
654 | * error or upon no response. The allocated response must be freed by | |
655 | * the caller in the case of an SR_OK as well as in the case of | |
656 | * parsing error. | |
657 | */ | |
658 | SR_PRIV int sr_scpi_get_uint8v(struct sr_scpi_dev_inst *scpi, | |
659 | const char *command, GArray **scpi_response) | |
660 | { | |
661 | int tmp, ret; | |
662 | char *response; | |
663 | gchar **ptr, **tokens; | |
664 | GArray *response_array; | |
665 | ||
666 | response = NULL; | |
667 | tokens = NULL; | |
668 | ||
669 | ret = sr_scpi_get_string(scpi, command, &response); | |
670 | if (ret != SR_OK && !response) | |
671 | return ret; | |
672 | ||
673 | tokens = g_strsplit(response, ",", 0); | |
674 | ptr = tokens; | |
675 | ||
676 | response_array = g_array_sized_new(TRUE, FALSE, sizeof(uint8_t), 256); | |
677 | ||
678 | while (*ptr) { | |
679 | if (sr_atoi(*ptr, &tmp) == SR_OK) | |
680 | response_array = g_array_append_val(response_array, | |
681 | tmp); | |
682 | else | |
683 | ret = SR_ERR_DATA; | |
684 | ||
685 | ptr++; | |
686 | } | |
687 | g_strfreev(tokens); | |
688 | g_free(response); | |
689 | ||
690 | if (response_array->len == 0) { | |
691 | g_array_free(response_array, TRUE); | |
692 | *scpi_response = NULL; | |
693 | return SR_ERR_DATA; | |
694 | } | |
695 | ||
696 | *scpi_response = response_array; | |
697 | ||
698 | return ret; | |
699 | } | |
700 | ||
701 | /** | |
702 | * Send the *IDN? SCPI command, receive the reply, parse it and store the | |
703 | * reply as a sr_scpi_hw_info structure in the supplied scpi_response pointer. | |
704 | * | |
705 | * The hw_info structure must be freed by the caller via sr_scpi_hw_info_free(). | |
706 | * | |
707 | * @param scpi Previously initialised SCPI device structure. | |
708 | * @param scpi_response Pointer where to store the hw_info structure. | |
709 | * | |
710 | * @return SR_OK upon success, SR_ERR* on failure. | |
711 | */ | |
712 | SR_PRIV int sr_scpi_get_hw_id(struct sr_scpi_dev_inst *scpi, | |
713 | struct sr_scpi_hw_info **scpi_response) | |
714 | { | |
715 | int num_tokens, ret; | |
716 | char *response; | |
717 | gchar **tokens; | |
718 | struct sr_scpi_hw_info *hw_info; | |
719 | ||
720 | response = NULL; | |
721 | tokens = NULL; | |
722 | ||
723 | ret = sr_scpi_get_string(scpi, SCPI_CMD_IDN, &response); | |
724 | if (ret != SR_OK && !response) | |
725 | return ret; | |
726 | ||
727 | sr_info("Got IDN string: '%s'", response); | |
728 | ||
729 | /* | |
730 | * The response to a '*IDN?' is specified by the SCPI spec. It contains | |
731 | * a comma-separated list containing the manufacturer name, instrument | |
732 | * model, serial number of the instrument and the firmware version. | |
733 | */ | |
734 | tokens = g_strsplit(response, ",", 0); | |
735 | ||
736 | for (num_tokens = 0; tokens[num_tokens] != NULL; num_tokens++); | |
737 | ||
738 | if (num_tokens < 4) { | |
739 | sr_dbg("IDN response not according to spec: %80.s.", response); | |
740 | g_strfreev(tokens); | |
741 | g_free(response); | |
742 | return SR_ERR_DATA; | |
743 | } | |
744 | g_free(response); | |
745 | ||
746 | hw_info = g_malloc0(sizeof(struct sr_scpi_hw_info)); | |
747 | hw_info->manufacturer = g_strstrip(g_strdup(tokens[0])); | |
748 | hw_info->model = g_strstrip(g_strdup(tokens[1])); | |
749 | hw_info->serial_number = g_strstrip(g_strdup(tokens[2])); | |
750 | hw_info->firmware_version = g_strstrip(g_strdup(tokens[3])); | |
751 | ||
752 | g_strfreev(tokens); | |
753 | ||
754 | *scpi_response = hw_info; | |
755 | ||
756 | return SR_OK; | |
757 | } | |
758 | ||
759 | /** | |
760 | * Free a sr_scpi_hw_info struct. | |
761 | * | |
762 | * @param hw_info Pointer to the struct to free. | |
763 | * | |
764 | * This function is safe to call with a NULL pointer. | |
765 | */ | |
766 | SR_PRIV void sr_scpi_hw_info_free(struct sr_scpi_hw_info *hw_info) | |
767 | { | |
768 | if (hw_info) { | |
769 | g_free(hw_info->manufacturer); | |
770 | g_free(hw_info->model); | |
771 | g_free(hw_info->serial_number); | |
772 | g_free(hw_info->firmware_version); | |
773 | g_free(hw_info); | |
774 | } | |
775 | } |