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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 = sr_vsnprintf_ascii(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 | sr_vsprintf_ascii(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 | { | |
181 | va_list args; | |
182 | int ret; | |
183 | ||
184 | va_start(args, format); | |
185 | ret = scpi_send_variadic(scpi, format, args); | |
186 | va_end(args); | |
187 | ||
188 | return ret; | |
189 | } | |
190 | ||
191 | /** | |
192 | * Send data to SCPI device without mutex. | |
193 | * | |
194 | * TODO: This is only implemented in TcpRaw, but never used. | |
195 | * TODO: Use Mutex at all? | |
196 | * | |
197 | * @param scpi Previously initialised SCPI device structure. | |
198 | * @param buf Buffer with data to send. | |
199 | * @param len Number of bytes to send. | |
200 | * | |
201 | * @return Number of bytes read, or SR_ERR upon failure. | |
202 | */ | |
203 | static int scpi_write_data(struct sr_scpi_dev_inst *scpi, char *buf, int maxlen) | |
204 | { | |
205 | return scpi->write_data(scpi->priv, buf, maxlen); | |
206 | } | |
207 | ||
208 | /** | |
209 | * Read part of a response from SCPI device without mutex. | |
210 | * | |
211 | * @param scpi Previously initialised SCPI device structure. | |
212 | * @param buf Buffer to store result. | |
213 | * @param maxlen Maximum number of bytes to read. | |
214 | * | |
215 | * @return Number of bytes read, or SR_ERR upon failure. | |
216 | */ | |
217 | static int scpi_read_data(struct sr_scpi_dev_inst *scpi, char *buf, int maxlen) | |
218 | { | |
219 | return scpi->read_data(scpi->priv, buf, maxlen); | |
220 | } | |
221 | ||
222 | /** | |
223 | * Do a non-blocking read of up to the allocated length, and | |
224 | * check if a timeout has occured, without mutex. | |
225 | * | |
226 | * @param scpi Previously initialised SCPI device structure. | |
227 | * @param response Buffer to which the response is appended. | |
228 | * @param abs_timeout_us Absolute timeout in microseconds | |
229 | * | |
230 | * @return read length on success, SR_ERR* on failure. | |
231 | */ | |
232 | static int scpi_read_response(struct sr_scpi_dev_inst *scpi, | |
233 | GString *response, gint64 abs_timeout_us) | |
234 | { | |
235 | int len, space; | |
236 | ||
237 | space = response->allocated_len - response->len; | |
238 | len = scpi->read_data(scpi->priv, &response->str[response->len], space); | |
239 | ||
240 | if (len < 0) { | |
241 | sr_err("Incompletely read SCPI response."); | |
242 | return SR_ERR; | |
243 | } | |
244 | ||
245 | if (len > 0) { | |
246 | g_string_set_size(response, response->len + len); | |
247 | return len; | |
248 | } | |
249 | ||
250 | if (g_get_monotonic_time() > abs_timeout_us) { | |
251 | sr_err("Timed out waiting for SCPI response."); | |
252 | return SR_ERR_TIMEOUT; | |
253 | } | |
254 | ||
255 | return 0; | |
256 | } | |
257 | ||
258 | /** | |
259 | * Send a SCPI command, receive the reply and store the reply in | |
260 | * scpi_response, without mutex. | |
261 | * | |
262 | * @param scpi Previously initialised SCPI device structure. | |
263 | * @param command The SCPI command to send to the device. | |
264 | * @param scpi_response Pointer where to store the SCPI response. | |
265 | * | |
266 | * @return SR_OK on success, SR_ERR on failure. | |
267 | */ | |
268 | static int scpi_get_data(struct sr_scpi_dev_inst *scpi, | |
269 | const char *command, GString **scpi_response) | |
270 | { | |
271 | int ret; | |
272 | GString *response; | |
273 | int space; | |
274 | gint64 timeout; | |
275 | ||
276 | /* Optionally send caller provided command. */ | |
277 | if (command) { | |
278 | if (scpi_send(scpi, command) != SR_OK) | |
279 | return SR_ERR; | |
280 | } | |
281 | ||
282 | /* Initiate SCPI read operation. */ | |
283 | if (sr_scpi_read_begin(scpi) != SR_OK) | |
284 | return SR_ERR; | |
285 | ||
286 | /* Keep reading until completion or until timeout. */ | |
287 | timeout = g_get_monotonic_time() + scpi->read_timeout_us; | |
288 | ||
289 | response = *scpi_response; | |
290 | ||
291 | while (!sr_scpi_read_complete(scpi)) { | |
292 | /* Resize the buffer when free space drops below a threshold. */ | |
293 | space = response->allocated_len - response->len; | |
294 | if (space < 128) { | |
295 | int oldlen = response->len; | |
296 | g_string_set_size(response, oldlen + 1024); | |
297 | g_string_set_size(response, oldlen); | |
298 | } | |
299 | ||
300 | /* Read another chunk of the response. */ | |
301 | ret = scpi_read_response(scpi, response, timeout); | |
302 | ||
303 | if (ret < 0) | |
304 | return ret; | |
305 | if (ret > 0) | |
306 | timeout = g_get_monotonic_time() + scpi->read_timeout_us; | |
307 | } | |
308 | ||
309 | return SR_OK; | |
310 | } | |
311 | ||
312 | SR_PRIV GSList *sr_scpi_scan(struct drv_context *drvc, GSList *options, | |
313 | struct sr_dev_inst *(*probe_device)(struct sr_scpi_dev_inst *scpi)) | |
314 | { | |
315 | GSList *resources, *l, *devices; | |
316 | struct sr_dev_inst *sdi; | |
317 | const char *resource = NULL; | |
318 | const char *serialcomm = NULL; | |
319 | gchar **res; | |
320 | unsigned i; | |
321 | ||
322 | for (l = options; l; l = l->next) { | |
323 | struct sr_config *src = l->data; | |
324 | switch (src->key) { | |
325 | case SR_CONF_CONN: | |
326 | resource = g_variant_get_string(src->data, NULL); | |
327 | break; | |
328 | case SR_CONF_SERIALCOMM: | |
329 | serialcomm = g_variant_get_string(src->data, NULL); | |
330 | break; | |
331 | } | |
332 | } | |
333 | ||
334 | devices = NULL; | |
335 | for (i = 0; i < ARRAY_SIZE(scpi_devs); i++) { | |
336 | if ((resource && strcmp(resource, scpi_devs[i]->prefix)) | |
337 | || !scpi_devs[i]->scan) | |
338 | continue; | |
339 | resources = scpi_devs[i]->scan(drvc); | |
340 | for (l = resources; l; l = l->next) { | |
341 | res = g_strsplit(l->data, ":", 2); | |
342 | if (res[0] && (sdi = sr_scpi_scan_resource(drvc, res[0], | |
343 | serialcomm ? serialcomm : res[1], probe_device))) { | |
344 | devices = g_slist_append(devices, sdi); | |
345 | sdi->connection_id = g_strdup(l->data); | |
346 | } | |
347 | g_strfreev(res); | |
348 | } | |
349 | g_slist_free_full(resources, g_free); | |
350 | } | |
351 | ||
352 | if (!devices && resource) { | |
353 | sdi = sr_scpi_scan_resource(drvc, resource, serialcomm, probe_device); | |
354 | if (sdi) | |
355 | devices = g_slist_append(NULL, sdi); | |
356 | } | |
357 | ||
358 | /* Tack a copy of the newly found devices onto the driver list. */ | |
359 | if (devices) | |
360 | drvc->instances = g_slist_concat(drvc->instances, g_slist_copy(devices)); | |
361 | ||
362 | return devices; | |
363 | } | |
364 | ||
365 | SR_PRIV struct sr_scpi_dev_inst *scpi_dev_inst_new(struct drv_context *drvc, | |
366 | const char *resource, const char *serialcomm) | |
367 | { | |
368 | struct sr_scpi_dev_inst *scpi = NULL; | |
369 | const struct sr_scpi_dev_inst *scpi_dev; | |
370 | gchar **params; | |
371 | unsigned i; | |
372 | ||
373 | for (i = 0; i < ARRAY_SIZE(scpi_devs); i++) { | |
374 | scpi_dev = scpi_devs[i]; | |
375 | if (!strncmp(resource, scpi_dev->prefix, strlen(scpi_dev->prefix))) { | |
376 | sr_dbg("Opening %s device %s.", scpi_dev->name, resource); | |
377 | scpi = g_malloc(sizeof(*scpi)); | |
378 | *scpi = *scpi_dev; | |
379 | scpi->priv = g_malloc0(scpi->priv_size); | |
380 | scpi->read_timeout_us = 1000 * 1000; | |
381 | params = g_strsplit(resource, "/", 0); | |
382 | if (scpi->dev_inst_new(scpi->priv, drvc, resource, | |
383 | params, serialcomm) != SR_OK) { | |
384 | sr_scpi_free(scpi); | |
385 | scpi = NULL; | |
386 | } | |
387 | g_strfreev(params); | |
388 | break; | |
389 | } | |
390 | } | |
391 | ||
392 | return scpi; | |
393 | } | |
394 | ||
395 | /** | |
396 | * Open SCPI device. | |
397 | * | |
398 | * @param scpi Previously initialized SCPI device structure. | |
399 | * | |
400 | * @return SR_OK on success, SR_ERR on failure. | |
401 | */ | |
402 | SR_PRIV int sr_scpi_open(struct sr_scpi_dev_inst *scpi) | |
403 | { | |
404 | g_mutex_init(&scpi->scpi_mutex); | |
405 | ||
406 | return scpi->open(scpi); | |
407 | } | |
408 | ||
409 | /** | |
410 | * Add an event source for an SCPI device. | |
411 | * | |
412 | * @param session The session to add the event source to. | |
413 | * @param scpi Previously initialized SCPI device structure. | |
414 | * @param events Events to check for. | |
415 | * @param timeout Max time to wait before the callback is called, ignored if 0. | |
416 | * @param cb Callback function to add. Must not be NULL. | |
417 | * @param cb_data Data for the callback function. Can be NULL. | |
418 | * | |
419 | * @return SR_OK upon success, SR_ERR_ARG upon invalid arguments, or | |
420 | * SR_ERR_MALLOC upon memory allocation errors. | |
421 | */ | |
422 | SR_PRIV int sr_scpi_source_add(struct sr_session *session, | |
423 | struct sr_scpi_dev_inst *scpi, int events, int timeout, | |
424 | sr_receive_data_callback cb, void *cb_data) | |
425 | { | |
426 | return scpi->source_add(session, scpi->priv, events, timeout, cb, cb_data); | |
427 | } | |
428 | ||
429 | /** | |
430 | * Remove event source for an SCPI device. | |
431 | * | |
432 | * @param session The session to remove the event source from. | |
433 | * @param scpi Previously initialized SCPI device structure. | |
434 | * | |
435 | * @return SR_OK upon success, SR_ERR_ARG upon invalid arguments, or | |
436 | * SR_ERR_MALLOC upon memory allocation errors, SR_ERR_BUG upon | |
437 | * internal errors. | |
438 | */ | |
439 | SR_PRIV int sr_scpi_source_remove(struct sr_session *session, | |
440 | struct sr_scpi_dev_inst *scpi) | |
441 | { | |
442 | return scpi->source_remove(session, scpi->priv); | |
443 | } | |
444 | ||
445 | /** | |
446 | * Send a SCPI command. | |
447 | * | |
448 | * @param scpi Previously initialized SCPI device structure. | |
449 | * @param format Format string, to be followed by any necessary arguments. | |
450 | * | |
451 | * @return SR_OK on success, SR_ERR on failure. | |
452 | */ | |
453 | SR_PRIV int sr_scpi_send(struct sr_scpi_dev_inst *scpi, | |
454 | const char *format, ...) | |
455 | { | |
456 | va_list args; | |
457 | int ret; | |
458 | ||
459 | va_start(args, format); | |
460 | g_mutex_lock(&scpi->scpi_mutex); | |
461 | ret = scpi_send_variadic(scpi, format, args); | |
462 | g_mutex_unlock(&scpi->scpi_mutex); | |
463 | va_end(args); | |
464 | ||
465 | return ret; | |
466 | } | |
467 | ||
468 | /** | |
469 | * Send a SCPI command with a variadic argument list. | |
470 | * | |
471 | * @param scpi Previously initialized SCPI device structure. | |
472 | * @param format Format string. | |
473 | * @param args Argument list. | |
474 | * | |
475 | * @return SR_OK on success, SR_ERR on failure. | |
476 | */ | |
477 | SR_PRIV int sr_scpi_send_variadic(struct sr_scpi_dev_inst *scpi, | |
478 | const char *format, va_list args) | |
479 | { | |
480 | int ret; | |
481 | ||
482 | g_mutex_lock(&scpi->scpi_mutex); | |
483 | ret = scpi_send_variadic(scpi, format, args); | |
484 | g_mutex_unlock(&scpi->scpi_mutex); | |
485 | ||
486 | return ret; | |
487 | } | |
488 | ||
489 | /** | |
490 | * Begin receiving an SCPI reply. | |
491 | * | |
492 | * @param scpi Previously initialised SCPI device structure. | |
493 | * | |
494 | * @return SR_OK on success, SR_ERR on failure. | |
495 | */ | |
496 | SR_PRIV int sr_scpi_read_begin(struct sr_scpi_dev_inst *scpi) | |
497 | { | |
498 | return scpi->read_begin(scpi->priv); | |
499 | } | |
500 | ||
501 | /** | |
502 | * Read part of a response from SCPI device. | |
503 | * | |
504 | * @param scpi Previously initialised SCPI device structure. | |
505 | * @param buf Buffer to store result. | |
506 | * @param maxlen Maximum number of bytes to read. | |
507 | * | |
508 | * @return Number of bytes read, or SR_ERR upon failure. | |
509 | */ | |
510 | SR_PRIV int sr_scpi_read_data(struct sr_scpi_dev_inst *scpi, | |
511 | char *buf, int maxlen) | |
512 | { | |
513 | int ret; | |
514 | ||
515 | g_mutex_lock(&scpi->scpi_mutex); | |
516 | ret = scpi_read_data(scpi, buf, maxlen); | |
517 | g_mutex_unlock(&scpi->scpi_mutex); | |
518 | ||
519 | return ret; | |
520 | } | |
521 | ||
522 | /** | |
523 | * Send data to SCPI device. | |
524 | * | |
525 | * TODO: This is only implemented in TcpRaw, but never used. | |
526 | * TODO: Use Mutex at all? | |
527 | * | |
528 | * @param scpi Previously initialised SCPI device structure. | |
529 | * @param buf Buffer with data to send. | |
530 | * @param len Number of bytes to send. | |
531 | * | |
532 | * @return Number of bytes read, or SR_ERR upon failure. | |
533 | */ | |
534 | SR_PRIV int sr_scpi_write_data(struct sr_scpi_dev_inst *scpi, | |
535 | char *buf, int maxlen) | |
536 | { | |
537 | int ret; | |
538 | ||
539 | g_mutex_lock(&scpi->scpi_mutex); | |
540 | ret = scpi_write_data(scpi, buf, maxlen); | |
541 | g_mutex_unlock(&scpi->scpi_mutex); | |
542 | ||
543 | return ret; | |
544 | } | |
545 | ||
546 | /** | |
547 | * Check whether a complete SCPI response has been received. | |
548 | * | |
549 | * @param scpi Previously initialised SCPI device structure. | |
550 | * | |
551 | * @return 1 if complete, 0 otherwise. | |
552 | */ | |
553 | SR_PRIV int sr_scpi_read_complete(struct sr_scpi_dev_inst *scpi) | |
554 | { | |
555 | return scpi->read_complete(scpi->priv); | |
556 | } | |
557 | ||
558 | /** | |
559 | * Close SCPI device. | |
560 | * | |
561 | * @param scpi Previously initialized SCPI device structure. | |
562 | * | |
563 | * @return SR_OK on success, SR_ERR on failure. | |
564 | */ | |
565 | SR_PRIV int sr_scpi_close(struct sr_scpi_dev_inst *scpi) | |
566 | { | |
567 | int ret; | |
568 | ||
569 | g_mutex_lock(&scpi->scpi_mutex); | |
570 | ret = scpi->close(scpi); | |
571 | g_mutex_unlock(&scpi->scpi_mutex); | |
572 | g_mutex_clear(&scpi->scpi_mutex); | |
573 | ||
574 | return ret; | |
575 | } | |
576 | ||
577 | /** | |
578 | * Free SCPI device. | |
579 | * | |
580 | * @param scpi Previously initialized SCPI device structure. If NULL, | |
581 | * this function does nothing. | |
582 | */ | |
583 | SR_PRIV void sr_scpi_free(struct sr_scpi_dev_inst *scpi) | |
584 | { | |
585 | if (!scpi) | |
586 | return; | |
587 | ||
588 | scpi->free(scpi->priv); | |
589 | g_free(scpi->priv); | |
590 | g_free(scpi); | |
591 | } | |
592 | ||
593 | /** | |
594 | * Send a SCPI command, receive the reply and store the reply in scpi_response. | |
595 | * | |
596 | * @param scpi Previously initialised SCPI device structure. | |
597 | * @param command The SCPI command to send to the device (can be NULL). | |
598 | * @param scpi_response Pointer where to store the SCPI response. | |
599 | * | |
600 | * @return SR_OK on success, SR_ERR* on failure. | |
601 | */ | |
602 | SR_PRIV int sr_scpi_get_string(struct sr_scpi_dev_inst *scpi, | |
603 | const char *command, char **scpi_response) | |
604 | { | |
605 | GString *response; | |
606 | response = g_string_sized_new(1024); | |
607 | ||
608 | if (sr_scpi_get_data(scpi, command, &response) != SR_OK) { | |
609 | if (response) | |
610 | g_string_free(response, TRUE); | |
611 | return SR_ERR; | |
612 | } | |
613 | ||
614 | /* Get rid of trailing linefeed if present */ | |
615 | if (response->len >= 1 && response->str[response->len - 1] == '\n') | |
616 | g_string_truncate(response, response->len - 1); | |
617 | ||
618 | /* Get rid of trailing carriage return if present */ | |
619 | if (response->len >= 1 && response->str[response->len - 1] == '\r') | |
620 | g_string_truncate(response, response->len - 1); | |
621 | ||
622 | sr_spew("Got response: '%.70s', length %" G_GSIZE_FORMAT ".", | |
623 | response->str, response->len); | |
624 | ||
625 | *scpi_response = g_string_free(response, FALSE); | |
626 | ||
627 | return SR_OK; | |
628 | } | |
629 | ||
630 | /** | |
631 | * Do a non-blocking read of up to the allocated length, and | |
632 | * check if a timeout has occured. | |
633 | * | |
634 | * @param scpi Previously initialised SCPI device structure. | |
635 | * @param response Buffer to which the response is appended. | |
636 | * @param abs_timeout_us Absolute timeout in microseconds | |
637 | * | |
638 | * @return read length on success, SR_ERR* on failure. | |
639 | */ | |
640 | SR_PRIV int sr_scpi_read_response(struct sr_scpi_dev_inst *scpi, | |
641 | GString *response, gint64 abs_timeout_us) | |
642 | { | |
643 | int ret; | |
644 | ||
645 | g_mutex_lock(&scpi->scpi_mutex); | |
646 | ret = scpi_read_response(scpi, response, abs_timeout_us); | |
647 | g_mutex_unlock(&scpi->scpi_mutex); | |
648 | ||
649 | return ret; | |
650 | } | |
651 | ||
652 | SR_PRIV int sr_scpi_get_data(struct sr_scpi_dev_inst *scpi, | |
653 | const char *command, GString **scpi_response) | |
654 | { | |
655 | int ret; | |
656 | ||
657 | g_mutex_lock(&scpi->scpi_mutex); | |
658 | ret = scpi_get_data(scpi, command, scpi_response); | |
659 | g_mutex_unlock(&scpi->scpi_mutex); | |
660 | ||
661 | return ret; | |
662 | } | |
663 | ||
664 | /** | |
665 | * Send a SCPI command, read the reply, parse it as a bool value and store the | |
666 | * result in scpi_response. | |
667 | * | |
668 | * @param scpi Previously initialised SCPI device structure. | |
669 | * @param command The SCPI command to send to the device (can be NULL). | |
670 | * @param scpi_response Pointer where to store the parsed result. | |
671 | * | |
672 | * @return SR_OK on success, SR_ERR* on failure. | |
673 | */ | |
674 | SR_PRIV int sr_scpi_get_bool(struct sr_scpi_dev_inst *scpi, | |
675 | const char *command, gboolean *scpi_response) | |
676 | { | |
677 | int ret; | |
678 | char *response; | |
679 | ||
680 | response = NULL; | |
681 | ||
682 | ret = sr_scpi_get_string(scpi, command, &response); | |
683 | if (ret != SR_OK && !response) | |
684 | return ret; | |
685 | ||
686 | if (parse_strict_bool(response, scpi_response) == SR_OK) | |
687 | ret = SR_OK; | |
688 | else | |
689 | ret = SR_ERR_DATA; | |
690 | ||
691 | g_free(response); | |
692 | ||
693 | return ret; | |
694 | } | |
695 | ||
696 | /** | |
697 | * Send a SCPI command, read the reply, parse it as an integer and store the | |
698 | * result in scpi_response. | |
699 | * | |
700 | * @param scpi Previously initialised SCPI device structure. | |
701 | * @param command The SCPI command to send to the device (can be NULL). | |
702 | * @param scpi_response Pointer where to store the parsed result. | |
703 | * | |
704 | * @return SR_OK on success, SR_ERR* on failure. | |
705 | */ | |
706 | SR_PRIV int sr_scpi_get_int(struct sr_scpi_dev_inst *scpi, | |
707 | const char *command, int *scpi_response) | |
708 | { | |
709 | int ret; | |
710 | char *response; | |
711 | ||
712 | response = NULL; | |
713 | ||
714 | ret = sr_scpi_get_string(scpi, command, &response); | |
715 | if (ret != SR_OK && !response) | |
716 | return ret; | |
717 | ||
718 | if (sr_atoi(response, scpi_response) == SR_OK) | |
719 | ret = SR_OK; | |
720 | else | |
721 | ret = SR_ERR_DATA; | |
722 | ||
723 | g_free(response); | |
724 | ||
725 | return ret; | |
726 | } | |
727 | ||
728 | /** | |
729 | * Send a SCPI command, read the reply, parse it as a float and store the | |
730 | * result in scpi_response. | |
731 | * | |
732 | * @param scpi Previously initialised SCPI device structure. | |
733 | * @param command The SCPI command to send to the device (can be NULL). | |
734 | * @param scpi_response Pointer where to store the parsed result. | |
735 | * | |
736 | * @return SR_OK on success, SR_ERR* on failure. | |
737 | */ | |
738 | SR_PRIV int sr_scpi_get_float(struct sr_scpi_dev_inst *scpi, | |
739 | const char *command, float *scpi_response) | |
740 | { | |
741 | int ret; | |
742 | char *response; | |
743 | ||
744 | response = NULL; | |
745 | ||
746 | ret = sr_scpi_get_string(scpi, command, &response); | |
747 | if (ret != SR_OK && !response) | |
748 | return ret; | |
749 | ||
750 | if (sr_atof_ascii(response, scpi_response) == SR_OK) | |
751 | ret = SR_OK; | |
752 | else | |
753 | ret = SR_ERR_DATA; | |
754 | ||
755 | g_free(response); | |
756 | ||
757 | return ret; | |
758 | } | |
759 | ||
760 | /** | |
761 | * Send a SCPI command, read the reply, parse it as a double and store the | |
762 | * result in scpi_response. | |
763 | * | |
764 | * @param scpi Previously initialised SCPI device structure. | |
765 | * @param command The SCPI command to send to the device (can be NULL). | |
766 | * @param scpi_response Pointer where to store the parsed result. | |
767 | * | |
768 | * @return SR_OK on success, SR_ERR* on failure. | |
769 | */ | |
770 | SR_PRIV int sr_scpi_get_double(struct sr_scpi_dev_inst *scpi, | |
771 | const char *command, double *scpi_response) | |
772 | { | |
773 | int ret; | |
774 | char *response; | |
775 | ||
776 | response = NULL; | |
777 | ||
778 | ret = sr_scpi_get_string(scpi, command, &response); | |
779 | if (ret != SR_OK && !response) | |
780 | return ret; | |
781 | ||
782 | if (sr_atod_ascii(response, scpi_response) == SR_OK) | |
783 | ret = SR_OK; | |
784 | else | |
785 | ret = SR_ERR_DATA; | |
786 | ||
787 | g_free(response); | |
788 | ||
789 | return ret; | |
790 | } | |
791 | ||
792 | /** | |
793 | * Send a SCPI *OPC? command, read the reply and return the result of the | |
794 | * command. | |
795 | * | |
796 | * @param scpi Previously initialised SCPI device structure. | |
797 | * | |
798 | * @return SR_OK on success, SR_ERR* on failure. | |
799 | */ | |
800 | SR_PRIV int sr_scpi_get_opc(struct sr_scpi_dev_inst *scpi) | |
801 | { | |
802 | unsigned int i; | |
803 | gboolean opc; | |
804 | ||
805 | for (i = 0; i < SCPI_READ_RETRIES; i++) { | |
806 | opc = FALSE; | |
807 | sr_scpi_get_bool(scpi, SCPI_CMD_OPC, &opc); | |
808 | if (opc) | |
809 | return SR_OK; | |
810 | g_usleep(SCPI_READ_RETRY_TIMEOUT_US); | |
811 | } | |
812 | ||
813 | return SR_ERR; | |
814 | } | |
815 | ||
816 | /** | |
817 | * Send a SCPI command, read the reply, parse it as comma separated list of | |
818 | * floats and store the as an result in scpi_response. | |
819 | * | |
820 | * @param scpi Previously initialised SCPI device structure. | |
821 | * @param command The SCPI command to send to the device (can be NULL). | |
822 | * @param scpi_response Pointer where to store the parsed result. | |
823 | * | |
824 | * @return SR_OK upon successfully parsing all values, SR_ERR* upon a parsing | |
825 | * error or upon no response. The allocated response must be freed by | |
826 | * the caller in the case of an SR_OK as well as in the case of | |
827 | * parsing error. | |
828 | */ | |
829 | SR_PRIV int sr_scpi_get_floatv(struct sr_scpi_dev_inst *scpi, | |
830 | const char *command, GArray **scpi_response) | |
831 | { | |
832 | int ret; | |
833 | float tmp; | |
834 | char *response; | |
835 | gchar **ptr, **tokens; | |
836 | GArray *response_array; | |
837 | ||
838 | response = NULL; | |
839 | tokens = NULL; | |
840 | ||
841 | ret = sr_scpi_get_string(scpi, command, &response); | |
842 | if (ret != SR_OK && !response) | |
843 | return ret; | |
844 | ||
845 | tokens = g_strsplit(response, ",", 0); | |
846 | ptr = tokens; | |
847 | ||
848 | response_array = g_array_sized_new(TRUE, FALSE, sizeof(float), 256); | |
849 | ||
850 | while (*ptr) { | |
851 | if (sr_atof_ascii(*ptr, &tmp) == SR_OK) | |
852 | response_array = g_array_append_val(response_array, | |
853 | tmp); | |
854 | else | |
855 | ret = SR_ERR_DATA; | |
856 | ||
857 | ptr++; | |
858 | } | |
859 | g_strfreev(tokens); | |
860 | g_free(response); | |
861 | ||
862 | if (ret != SR_OK && response_array->len == 0) { | |
863 | g_array_free(response_array, TRUE); | |
864 | *scpi_response = NULL; | |
865 | return SR_ERR_DATA; | |
866 | } | |
867 | ||
868 | *scpi_response = response_array; | |
869 | ||
870 | return ret; | |
871 | } | |
872 | ||
873 | /** | |
874 | * Send a SCPI command, read the reply, parse it as comma separated list of | |
875 | * unsigned 8 bit integers and store the as an result in scpi_response. | |
876 | * | |
877 | * @param scpi Previously initialised SCPI device structure. | |
878 | * @param command The SCPI command to send to the device (can be NULL). | |
879 | * @param scpi_response Pointer where to store the parsed result. | |
880 | * | |
881 | * @return SR_OK upon successfully parsing all values, SR_ERR* upon a parsing | |
882 | * error or upon no response. The allocated response must be freed by | |
883 | * the caller in the case of an SR_OK as well as in the case of | |
884 | * parsing error. | |
885 | */ | |
886 | SR_PRIV int sr_scpi_get_uint8v(struct sr_scpi_dev_inst *scpi, | |
887 | const char *command, GArray **scpi_response) | |
888 | { | |
889 | int tmp, ret; | |
890 | char *response; | |
891 | gchar **ptr, **tokens; | |
892 | GArray *response_array; | |
893 | ||
894 | response = NULL; | |
895 | tokens = NULL; | |
896 | ||
897 | ret = sr_scpi_get_string(scpi, command, &response); | |
898 | if (ret != SR_OK && !response) | |
899 | return ret; | |
900 | ||
901 | tokens = g_strsplit(response, ",", 0); | |
902 | ptr = tokens; | |
903 | ||
904 | response_array = g_array_sized_new(TRUE, FALSE, sizeof(uint8_t), 256); | |
905 | ||
906 | while (*ptr) { | |
907 | if (sr_atoi(*ptr, &tmp) == SR_OK) | |
908 | response_array = g_array_append_val(response_array, | |
909 | tmp); | |
910 | else | |
911 | ret = SR_ERR_DATA; | |
912 | ||
913 | ptr++; | |
914 | } | |
915 | g_strfreev(tokens); | |
916 | g_free(response); | |
917 | ||
918 | if (response_array->len == 0) { | |
919 | g_array_free(response_array, TRUE); | |
920 | *scpi_response = NULL; | |
921 | return SR_ERR_DATA; | |
922 | } | |
923 | ||
924 | *scpi_response = response_array; | |
925 | ||
926 | return ret; | |
927 | } | |
928 | ||
929 | /** | |
930 | * Send a SCPI command, read the reply, parse it as binary data with a | |
931 | * "definite length block" header and store the as an result in scpi_response. | |
932 | * | |
933 | * @param scpi Previously initialised SCPI device structure. | |
934 | * @param command The SCPI command to send to the device (can be NULL). | |
935 | * @param scpi_response Pointer where to store the parsed result. | |
936 | * | |
937 | * @return SR_OK upon successfully parsing all values, SR_ERR* upon a parsing | |
938 | * error or upon no response. The allocated response must be freed by | |
939 | * the caller in the case of an SR_OK as well as in the case of | |
940 | * parsing error. | |
941 | */ | |
942 | SR_PRIV int sr_scpi_get_block(struct sr_scpi_dev_inst *scpi, | |
943 | const char *command, GByteArray **scpi_response) | |
944 | { | |
945 | int ret; | |
946 | GString* response; | |
947 | char buf[10]; | |
948 | long llen; | |
949 | long datalen; | |
950 | gint64 timeout; | |
951 | ||
952 | g_mutex_lock(&scpi->scpi_mutex); | |
953 | ||
954 | if (command) | |
955 | if (scpi_send(scpi, command) != SR_OK) { | |
956 | g_mutex_unlock(&scpi->scpi_mutex); | |
957 | return SR_ERR; | |
958 | } | |
959 | ||
960 | if (sr_scpi_read_begin(scpi) != SR_OK) { | |
961 | g_mutex_unlock(&scpi->scpi_mutex); | |
962 | return SR_ERR; | |
963 | } | |
964 | ||
965 | /* | |
966 | * Assume an initial maximum length, optionally gets adjusted below. | |
967 | * Prepare a NULL return value for when error paths will be taken. | |
968 | */ | |
969 | response = g_string_sized_new(1024); | |
970 | ||
971 | timeout = g_get_monotonic_time() + scpi->read_timeout_us; | |
972 | ||
973 | *scpi_response = NULL; | |
974 | ||
975 | /* Get (the first chunk of) the response. */ | |
976 | while (response->len < 2) { | |
977 | ret = scpi_read_response(scpi, response, timeout); | |
978 | if (ret < 0) { | |
979 | g_mutex_unlock(&scpi->scpi_mutex); | |
980 | g_string_free(response, TRUE); | |
981 | return ret; | |
982 | } | |
983 | } | |
984 | ||
985 | /* | |
986 | * SCPI protocol data blocks are preceeded with a length spec. | |
987 | * The length spec consists of a '#' marker, one digit which | |
988 | * specifies the character count of the length spec, and the | |
989 | * respective number of characters which specify the data block's | |
990 | * length. Raw data bytes follow (thus one must no longer assume | |
991 | * that the received input stream would be an ASCIIZ string). | |
992 | * | |
993 | * Get the data block length, and strip off the length spec from | |
994 | * the input buffer, leaving just the data bytes. | |
995 | */ | |
996 | if (response->str[0] != '#') { | |
997 | g_mutex_unlock(&scpi->scpi_mutex); | |
998 | g_string_free(response, TRUE); | |
999 | return SR_ERR_DATA; | |
1000 | } | |
1001 | buf[0] = response->str[1]; | |
1002 | buf[1] = '\0'; | |
1003 | ret = sr_atol(buf, &llen); | |
1004 | if ((ret != SR_OK) || (llen == 0)) { | |
1005 | g_mutex_unlock(&scpi->scpi_mutex); | |
1006 | g_string_free(response, TRUE); | |
1007 | return ret; | |
1008 | } | |
1009 | ||
1010 | while (response->len < (unsigned long)(2 + llen)) { | |
1011 | ret = scpi_read_response(scpi, response, timeout); | |
1012 | if (ret < 0) { | |
1013 | g_mutex_unlock(&scpi->scpi_mutex); | |
1014 | g_string_free(response, TRUE); | |
1015 | return ret; | |
1016 | } | |
1017 | } | |
1018 | ||
1019 | memcpy(buf, &response->str[2], llen); | |
1020 | buf[llen] = '\0'; | |
1021 | ret = sr_atol(buf, &datalen); | |
1022 | if ((ret != SR_OK) || (datalen == 0)) { | |
1023 | g_mutex_unlock(&scpi->scpi_mutex); | |
1024 | g_string_free(response, TRUE); | |
1025 | return ret; | |
1026 | } | |
1027 | g_string_erase(response, 0, 2 + llen); | |
1028 | ||
1029 | /* | |
1030 | * If the initially assumed length does not cover the data block | |
1031 | * length, then re-allocate the buffer size to the now known | |
1032 | * length, and keep reading more chunks of response data. | |
1033 | */ | |
1034 | if (response->len < (unsigned long)(datalen)) { | |
1035 | int oldlen = response->len; | |
1036 | g_string_set_size(response, datalen); | |
1037 | g_string_set_size(response, oldlen); | |
1038 | } | |
1039 | ||
1040 | while (response->len < (unsigned long)(datalen)) { | |
1041 | ret = scpi_read_response(scpi, response, timeout); | |
1042 | if (ret < 0) { | |
1043 | g_mutex_unlock(&scpi->scpi_mutex); | |
1044 | g_string_free(response, TRUE); | |
1045 | return ret; | |
1046 | } | |
1047 | if (ret > 0) | |
1048 | timeout = g_get_monotonic_time() + scpi->read_timeout_us; | |
1049 | } | |
1050 | ||
1051 | g_mutex_unlock(&scpi->scpi_mutex); | |
1052 | ||
1053 | /* Convert received data to byte array. */ | |
1054 | *scpi_response = g_byte_array_new_take( | |
1055 | (guint8*)g_string_free(response, FALSE), datalen); | |
1056 | ||
1057 | return SR_OK; | |
1058 | } | |
1059 | ||
1060 | /** | |
1061 | * Send the *IDN? SCPI command, receive the reply, parse it and store the | |
1062 | * reply as a sr_scpi_hw_info structure in the supplied scpi_response pointer. | |
1063 | * | |
1064 | * The hw_info structure must be freed by the caller via sr_scpi_hw_info_free(). | |
1065 | * | |
1066 | * @param scpi Previously initialised SCPI device structure. | |
1067 | * @param scpi_response Pointer where to store the hw_info structure. | |
1068 | * | |
1069 | * @return SR_OK upon success, SR_ERR* on failure. | |
1070 | */ | |
1071 | SR_PRIV int sr_scpi_get_hw_id(struct sr_scpi_dev_inst *scpi, | |
1072 | struct sr_scpi_hw_info **scpi_response) | |
1073 | { | |
1074 | int num_tokens, ret; | |
1075 | char *response; | |
1076 | gchar **tokens; | |
1077 | struct sr_scpi_hw_info *hw_info; | |
1078 | gchar *idn_substr; | |
1079 | ||
1080 | response = NULL; | |
1081 | tokens = NULL; | |
1082 | ||
1083 | ret = sr_scpi_get_string(scpi, SCPI_CMD_IDN, &response); | |
1084 | if (ret != SR_OK && !response) | |
1085 | return ret; | |
1086 | ||
1087 | /* | |
1088 | * The response to a '*IDN?' is specified by the SCPI spec. It contains | |
1089 | * a comma-separated list containing the manufacturer name, instrument | |
1090 | * model, serial number of the instrument and the firmware version. | |
1091 | */ | |
1092 | tokens = g_strsplit(response, ",", 0); | |
1093 | ||
1094 | for (num_tokens = 0; tokens[num_tokens] != NULL; num_tokens++); | |
1095 | ||
1096 | if (num_tokens < 4) { | |
1097 | sr_dbg("IDN response not according to spec: %80.s.", response); | |
1098 | g_strfreev(tokens); | |
1099 | g_free(response); | |
1100 | return SR_ERR_DATA; | |
1101 | } | |
1102 | g_free(response); | |
1103 | ||
1104 | hw_info = g_malloc0(sizeof(struct sr_scpi_hw_info)); | |
1105 | ||
1106 | idn_substr = g_strstr_len(tokens[0], -1, "IDN "); | |
1107 | if (idn_substr == NULL) | |
1108 | hw_info->manufacturer = g_strstrip(g_strdup(tokens[0])); | |
1109 | else | |
1110 | hw_info->manufacturer = g_strstrip(g_strdup(idn_substr + 4)); | |
1111 | ||
1112 | hw_info->model = g_strstrip(g_strdup(tokens[1])); | |
1113 | hw_info->serial_number = g_strstrip(g_strdup(tokens[2])); | |
1114 | hw_info->firmware_version = g_strstrip(g_strdup(tokens[3])); | |
1115 | ||
1116 | g_strfreev(tokens); | |
1117 | ||
1118 | *scpi_response = hw_info; | |
1119 | ||
1120 | return SR_OK; | |
1121 | } | |
1122 | ||
1123 | /** | |
1124 | * Free a sr_scpi_hw_info struct. | |
1125 | * | |
1126 | * @param hw_info Pointer to the struct to free. If NULL, this | |
1127 | * function does nothing. | |
1128 | */ | |
1129 | SR_PRIV void sr_scpi_hw_info_free(struct sr_scpi_hw_info *hw_info) | |
1130 | { | |
1131 | if (!hw_info) | |
1132 | return; | |
1133 | ||
1134 | g_free(hw_info->manufacturer); | |
1135 | g_free(hw_info->model); | |
1136 | g_free(hw_info->serial_number); | |
1137 | g_free(hw_info->firmware_version); | |
1138 | g_free(hw_info); | |
1139 | } | |
1140 | ||
1141 | SR_PRIV const char *sr_vendor_alias(const char *raw_vendor) | |
1142 | { | |
1143 | unsigned int i; | |
1144 | ||
1145 | for (i = 0; i < ARRAY_SIZE(scpi_vendors); i++) { | |
1146 | if (!g_ascii_strcasecmp(raw_vendor, scpi_vendors[i][0])) | |
1147 | return scpi_vendors[i][1]; | |
1148 | } | |
1149 | ||
1150 | return raw_vendor; | |
1151 | } | |
1152 | ||
1153 | SR_PRIV const char *sr_scpi_cmd_get(const struct scpi_command *cmdtable, | |
1154 | int command) | |
1155 | { | |
1156 | unsigned int i; | |
1157 | const char *cmd; | |
1158 | ||
1159 | if (!cmdtable) | |
1160 | return NULL; | |
1161 | ||
1162 | cmd = NULL; | |
1163 | for (i = 0; cmdtable[i].string; i++) { | |
1164 | if (cmdtable[i].command == command) { | |
1165 | cmd = cmdtable[i].string; | |
1166 | break; | |
1167 | } | |
1168 | } | |
1169 | ||
1170 | return cmd; | |
1171 | } | |
1172 | ||
1173 | SR_PRIV int sr_scpi_cmd(const struct sr_dev_inst *sdi, | |
1174 | const struct scpi_command *cmdtable, | |
1175 | int channel_command, const char *channel_name, | |
1176 | int command, ...) | |
1177 | { | |
1178 | struct sr_scpi_dev_inst *scpi; | |
1179 | va_list args; | |
1180 | int ret; | |
1181 | const char *channel_cmd; | |
1182 | const char *cmd; | |
1183 | ||
1184 | scpi = sdi->conn; | |
1185 | ||
1186 | if (!(cmd = sr_scpi_cmd_get(cmdtable, command))) { | |
1187 | /* Device does not implement this command, that's OK. */ | |
1188 | return SR_OK; | |
1189 | } | |
1190 | ||
1191 | g_mutex_lock(&scpi->scpi_mutex); | |
1192 | ||
1193 | /* Select channel. */ | |
1194 | channel_cmd = sr_scpi_cmd_get(cmdtable, channel_command); | |
1195 | if (channel_cmd && channel_name && | |
1196 | g_strcmp0(channel_name, scpi->actual_channel_name)) { | |
1197 | sr_spew("sr_scpi_cmd(): new channel = %s", channel_name); | |
1198 | scpi->actual_channel_name = channel_name; | |
1199 | ret = scpi_send(scpi, channel_cmd, channel_name); | |
1200 | if (ret != SR_OK) | |
1201 | return ret; | |
1202 | } | |
1203 | ||
1204 | va_start(args, command); | |
1205 | ret = scpi_send_variadic(scpi, cmd, args); | |
1206 | va_end(args); | |
1207 | ||
1208 | g_mutex_unlock(&scpi->scpi_mutex); | |
1209 | ||
1210 | return ret; | |
1211 | } | |
1212 | ||
1213 | SR_PRIV int sr_scpi_cmd_resp(const struct sr_dev_inst *sdi, | |
1214 | const struct scpi_command *cmdtable, | |
1215 | int channel_command, const char *channel_name, | |
1216 | GVariant **gvar, const GVariantType *gvtype, int command, ...) | |
1217 | { | |
1218 | struct sr_scpi_dev_inst *scpi; | |
1219 | va_list args; | |
1220 | const char *channel_cmd; | |
1221 | const char *cmd; | |
1222 | GString *response; | |
1223 | char *s; | |
1224 | gboolean b; | |
1225 | double d; | |
1226 | int ret; | |
1227 | ||
1228 | scpi = sdi->conn; | |
1229 | ||
1230 | if (!(cmd = sr_scpi_cmd_get(cmdtable, command))) { | |
1231 | /* Device does not implement this command. */ | |
1232 | return SR_ERR_NA; | |
1233 | } | |
1234 | ||
1235 | g_mutex_lock(&scpi->scpi_mutex); | |
1236 | ||
1237 | /* Select channel. */ | |
1238 | channel_cmd = sr_scpi_cmd_get(cmdtable, channel_command); | |
1239 | if (channel_cmd && channel_name && | |
1240 | g_strcmp0(channel_name, scpi->actual_channel_name)) { | |
1241 | sr_spew("sr_scpi_cmd_get(): new channel = %s", channel_name); | |
1242 | scpi->actual_channel_name = channel_name; | |
1243 | ret = scpi_send(scpi, channel_cmd, channel_name); | |
1244 | if (ret != SR_OK) | |
1245 | return ret; | |
1246 | } | |
1247 | ||
1248 | va_start(args, command); | |
1249 | ret = scpi_send_variadic(scpi, cmd, args); | |
1250 | va_end(args); | |
1251 | if (ret != SR_OK) { | |
1252 | g_mutex_unlock(&scpi->scpi_mutex); | |
1253 | return ret; | |
1254 | } | |
1255 | ||
1256 | response = g_string_sized_new(1024); | |
1257 | ret = scpi_get_data(scpi, NULL, &response); | |
1258 | if (ret != SR_OK) { | |
1259 | g_mutex_unlock(&scpi->scpi_mutex); | |
1260 | if (response) | |
1261 | g_string_free(response, TRUE); | |
1262 | return ret; | |
1263 | } | |
1264 | ||
1265 | g_mutex_unlock(&scpi->scpi_mutex); | |
1266 | ||
1267 | /* Get rid of trailing linefeed if present */ | |
1268 | if (response->len >= 1 && response->str[response->len - 1] == '\n') | |
1269 | g_string_truncate(response, response->len - 1); | |
1270 | ||
1271 | /* Get rid of trailing carriage return if present */ | |
1272 | if (response->len >= 1 && response->str[response->len - 1] == '\r') | |
1273 | g_string_truncate(response, response->len - 1); | |
1274 | ||
1275 | s = g_string_free(response, FALSE); | |
1276 | ||
1277 | ret = SR_OK; | |
1278 | if (g_variant_type_equal(gvtype, G_VARIANT_TYPE_BOOLEAN)) { | |
1279 | if ((ret = parse_strict_bool(s, &b)) == SR_OK) | |
1280 | *gvar = g_variant_new_boolean(b); | |
1281 | } else if (g_variant_type_equal(gvtype, G_VARIANT_TYPE_DOUBLE)) { | |
1282 | if ((ret = sr_atod_ascii(s, &d)) == SR_OK) | |
1283 | *gvar = g_variant_new_double(d); | |
1284 | } else if (g_variant_type_equal(gvtype, G_VARIANT_TYPE_STRING)) { | |
1285 | *gvar = g_variant_new_string(s); | |
1286 | } else { | |
1287 | sr_err("Unable to convert to desired GVariant type."); | |
1288 | ret = SR_ERR_NA; | |
1289 | } | |
1290 | ||
1291 | g_free(s); | |
1292 | ||
1293 | return ret; | |
1294 | } |