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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 | { "Agilent Technologies", "Agilent" }, | |
35 | { "CHROMA", "Chroma" }, | |
36 | { "Chroma ATE", "Chroma" }, | |
37 | { "HEWLETT-PACKARD", "HP" }, | |
38 | { "Keysight Technologies", "Keysight" }, | |
39 | { "PHILIPS", "Philips" }, | |
40 | { "RIGOL TECHNOLOGIES", "Rigol" }, | |
41 | }; | |
42 | ||
43 | /** | |
44 | * Parse a string representation of a boolean-like value into a gboolean. | |
45 | * Similar to sr_parse_boolstring but rejects strings which do not represent | |
46 | * a boolean-like value. | |
47 | * | |
48 | * @param str String to convert. | |
49 | * @param ret Pointer to a gboolean where the result of the conversion will be | |
50 | * stored. | |
51 | * | |
52 | * @return SR_OK on success, SR_ERR on failure. | |
53 | */ | |
54 | static int parse_strict_bool(const char *str, gboolean *ret) | |
55 | { | |
56 | if (!str) | |
57 | return SR_ERR_ARG; | |
58 | ||
59 | if (!g_strcmp0(str, "1") || | |
60 | !g_ascii_strncasecmp(str, "y", 1) || | |
61 | !g_ascii_strncasecmp(str, "t", 1) || | |
62 | !g_ascii_strncasecmp(str, "yes", 3) || | |
63 | !g_ascii_strncasecmp(str, "true", 4) || | |
64 | !g_ascii_strncasecmp(str, "on", 2)) { | |
65 | *ret = TRUE; | |
66 | return SR_OK; | |
67 | } else if (!g_strcmp0(str, "0") || | |
68 | !g_ascii_strncasecmp(str, "n", 1) || | |
69 | !g_ascii_strncasecmp(str, "f", 1) || | |
70 | !g_ascii_strncasecmp(str, "no", 2) || | |
71 | !g_ascii_strncasecmp(str, "false", 5) || | |
72 | !g_ascii_strncasecmp(str, "off", 3)) { | |
73 | *ret = FALSE; | |
74 | return SR_OK; | |
75 | } | |
76 | ||
77 | return SR_ERR; | |
78 | } | |
79 | ||
80 | SR_PRIV extern const struct sr_scpi_dev_inst scpi_serial_dev; | |
81 | SR_PRIV extern const struct sr_scpi_dev_inst scpi_tcp_raw_dev; | |
82 | SR_PRIV extern const struct sr_scpi_dev_inst scpi_tcp_rigol_dev; | |
83 | SR_PRIV extern const struct sr_scpi_dev_inst scpi_usbtmc_libusb_dev; | |
84 | SR_PRIV extern const struct sr_scpi_dev_inst scpi_vxi_dev; | |
85 | SR_PRIV extern const struct sr_scpi_dev_inst scpi_visa_dev; | |
86 | SR_PRIV extern const struct sr_scpi_dev_inst scpi_libgpib_dev; | |
87 | ||
88 | static const struct sr_scpi_dev_inst *scpi_devs[] = { | |
89 | &scpi_tcp_raw_dev, | |
90 | &scpi_tcp_rigol_dev, | |
91 | #ifdef HAVE_LIBUSB_1_0 | |
92 | &scpi_usbtmc_libusb_dev, | |
93 | #endif | |
94 | #if HAVE_RPC | |
95 | &scpi_vxi_dev, | |
96 | #endif | |
97 | #ifdef HAVE_LIBREVISA | |
98 | &scpi_visa_dev, | |
99 | #endif | |
100 | #ifdef HAVE_LIBGPIB | |
101 | &scpi_libgpib_dev, | |
102 | #endif | |
103 | #ifdef HAVE_LIBSERIALPORT | |
104 | &scpi_serial_dev, /* Must be last as it matches any resource. */ | |
105 | #endif | |
106 | }; | |
107 | ||
108 | static struct sr_dev_inst *sr_scpi_scan_resource(struct drv_context *drvc, | |
109 | const char *resource, const char *serialcomm, | |
110 | struct sr_dev_inst *(*probe_device)(struct sr_scpi_dev_inst *scpi)) | |
111 | { | |
112 | struct sr_scpi_dev_inst *scpi; | |
113 | struct sr_dev_inst *sdi; | |
114 | ||
115 | if (!(scpi = scpi_dev_inst_new(drvc, resource, serialcomm))) | |
116 | return NULL; | |
117 | ||
118 | if (sr_scpi_open(scpi) != SR_OK) { | |
119 | sr_info("Couldn't open SCPI device."); | |
120 | sr_scpi_free(scpi); | |
121 | return NULL; | |
122 | }; | |
123 | ||
124 | sdi = probe_device(scpi); | |
125 | ||
126 | sr_scpi_close(scpi); | |
127 | ||
128 | if (sdi) | |
129 | sdi->status = SR_ST_INACTIVE; | |
130 | else | |
131 | sr_scpi_free(scpi); | |
132 | ||
133 | return sdi; | |
134 | } | |
135 | ||
136 | /** | |
137 | * Send a SCPI command with a variadic argument list without mutex. | |
138 | * | |
139 | * @param scpi Previously initialized SCPI device structure. | |
140 | * @param format Format string. | |
141 | * @param args Argument list. | |
142 | * | |
143 | * @return SR_OK on success, SR_ERR on failure. | |
144 | */ | |
145 | static int scpi_send_variadic(struct sr_scpi_dev_inst *scpi, | |
146 | const char *format, va_list args) | |
147 | { | |
148 | va_list args_copy; | |
149 | char *buf; | |
150 | int len, ret; | |
151 | ||
152 | /* Get length of buffer required. */ | |
153 | va_copy(args_copy, args); | |
154 | len = sr_vsnprintf_ascii(NULL, 0, format, args_copy); | |
155 | va_end(args_copy); | |
156 | ||
157 | /* Allocate buffer and write out command. */ | |
158 | buf = g_malloc0(len + 2); | |
159 | sr_vsprintf_ascii(buf, format, args); | |
160 | if (buf[len - 1] != '\n') | |
161 | buf[len] = '\n'; | |
162 | ||
163 | /* Send command. */ | |
164 | ret = scpi->send(scpi->priv, buf); | |
165 | ||
166 | /* Free command buffer. */ | |
167 | g_free(buf); | |
168 | ||
169 | return ret; | |
170 | } | |
171 | ||
172 | /** | |
173 | * Send a SCPI command without mutex. | |
174 | * | |
175 | * @param scpi Previously initialized SCPI device structure. | |
176 | * @param format Format string, to be followed by any necessary arguments. | |
177 | * | |
178 | * @return SR_OK on success, SR_ERR on failure. | |
179 | */ | |
180 | static int scpi_send(struct sr_scpi_dev_inst *scpi, const char *format, ...) | |
181 | { | |
182 | va_list args; | |
183 | int ret; | |
184 | ||
185 | va_start(args, format); | |
186 | ret = scpi_send_variadic(scpi, format, args); | |
187 | va_end(args); | |
188 | ||
189 | return ret; | |
190 | } | |
191 | ||
192 | /** | |
193 | * Send data to SCPI device without mutex. | |
194 | * | |
195 | * TODO: This is only implemented in TcpRaw, but never used. | |
196 | * TODO: Use Mutex at all? | |
197 | * | |
198 | * @param scpi Previously initialised SCPI device structure. | |
199 | * @param buf Buffer with data to send. | |
200 | * @param len Number of bytes to send. | |
201 | * | |
202 | * @return Number of bytes read, or SR_ERR upon failure. | |
203 | */ | |
204 | static int scpi_write_data(struct sr_scpi_dev_inst *scpi, char *buf, int maxlen) | |
205 | { | |
206 | return scpi->write_data(scpi->priv, buf, maxlen); | |
207 | } | |
208 | ||
209 | /** | |
210 | * Read part of a response from SCPI device without mutex. | |
211 | * | |
212 | * @param scpi Previously initialised SCPI device structure. | |
213 | * @param buf Buffer to store result. | |
214 | * @param maxlen Maximum number of bytes to read. | |
215 | * | |
216 | * @return Number of bytes read, or SR_ERR upon failure. | |
217 | */ | |
218 | static int scpi_read_data(struct sr_scpi_dev_inst *scpi, char *buf, int maxlen) | |
219 | { | |
220 | return scpi->read_data(scpi->priv, buf, maxlen); | |
221 | } | |
222 | ||
223 | /** | |
224 | * Do a non-blocking read of up to the allocated length, and | |
225 | * check if a timeout has occured, without mutex. | |
226 | * | |
227 | * @param scpi Previously initialised SCPI device structure. | |
228 | * @param response Buffer to which the response is appended. | |
229 | * @param abs_timeout_us Absolute timeout in microseconds | |
230 | * | |
231 | * @return read length on success, SR_ERR* on failure. | |
232 | */ | |
233 | static int scpi_read_response(struct sr_scpi_dev_inst *scpi, | |
234 | GString *response, gint64 abs_timeout_us) | |
235 | { | |
236 | int len, space; | |
237 | ||
238 | space = response->allocated_len - response->len; | |
239 | len = scpi->read_data(scpi->priv, &response->str[response->len], space); | |
240 | ||
241 | if (len < 0) { | |
242 | sr_err("Incompletely read SCPI response."); | |
243 | return SR_ERR; | |
244 | } | |
245 | ||
246 | if (len > 0) { | |
247 | g_string_set_size(response, response->len + len); | |
248 | return len; | |
249 | } | |
250 | ||
251 | if (g_get_monotonic_time() > abs_timeout_us) { | |
252 | sr_err("Timed out waiting for SCPI response."); | |
253 | return SR_ERR_TIMEOUT; | |
254 | } | |
255 | ||
256 | return 0; | |
257 | } | |
258 | ||
259 | /** | |
260 | * Send a SCPI command, receive the reply and store the reply in | |
261 | * scpi_response, without mutex. | |
262 | * | |
263 | * @param scpi Previously initialised SCPI device structure. | |
264 | * @param command The SCPI command to send to the device. | |
265 | * @param scpi_response Pointer where to store the SCPI response. | |
266 | * | |
267 | * @return SR_OK on success, SR_ERR on failure. | |
268 | */ | |
269 | static int scpi_get_data(struct sr_scpi_dev_inst *scpi, | |
270 | const char *command, GString **scpi_response) | |
271 | { | |
272 | int ret; | |
273 | GString *response; | |
274 | int space; | |
275 | gint64 timeout; | |
276 | ||
277 | /* Optionally send caller provided command. */ | |
278 | if (command) { | |
279 | if (scpi_send(scpi, command) != SR_OK) | |
280 | return SR_ERR; | |
281 | } | |
282 | ||
283 | /* Initiate SCPI read operation. */ | |
284 | if (sr_scpi_read_begin(scpi) != SR_OK) | |
285 | return SR_ERR; | |
286 | ||
287 | /* Keep reading until completion or until timeout. */ | |
288 | timeout = g_get_monotonic_time() + scpi->read_timeout_us; | |
289 | ||
290 | response = *scpi_response; | |
291 | ||
292 | while (!sr_scpi_read_complete(scpi)) { | |
293 | /* Resize the buffer when free space drops below a threshold. */ | |
294 | space = response->allocated_len - response->len; | |
295 | if (space < 128) { | |
296 | int oldlen = response->len; | |
297 | g_string_set_size(response, oldlen + 1024); | |
298 | g_string_set_size(response, oldlen); | |
299 | } | |
300 | ||
301 | /* Read another chunk of the response. */ | |
302 | ret = scpi_read_response(scpi, response, timeout); | |
303 | ||
304 | if (ret < 0) | |
305 | return ret; | |
306 | if (ret > 0) | |
307 | timeout = g_get_monotonic_time() + scpi->read_timeout_us; | |
308 | } | |
309 | ||
310 | return SR_OK; | |
311 | } | |
312 | ||
313 | SR_PRIV GSList *sr_scpi_scan(struct drv_context *drvc, GSList *options, | |
314 | struct sr_dev_inst *(*probe_device)(struct sr_scpi_dev_inst *scpi)) | |
315 | { | |
316 | GSList *resources, *l, *devices; | |
317 | struct sr_dev_inst *sdi; | |
318 | const char *resource = NULL; | |
319 | const char *serialcomm = NULL; | |
320 | gchar **res; | |
321 | unsigned i; | |
322 | ||
323 | for (l = options; l; l = l->next) { | |
324 | struct sr_config *src = l->data; | |
325 | switch (src->key) { | |
326 | case SR_CONF_CONN: | |
327 | resource = g_variant_get_string(src->data, NULL); | |
328 | break; | |
329 | case SR_CONF_SERIALCOMM: | |
330 | serialcomm = g_variant_get_string(src->data, NULL); | |
331 | break; | |
332 | } | |
333 | } | |
334 | ||
335 | devices = NULL; | |
336 | for (i = 0; i < ARRAY_SIZE(scpi_devs); i++) { | |
337 | if ((resource && strcmp(resource, scpi_devs[i]->prefix)) | |
338 | || !scpi_devs[i]->scan) | |
339 | continue; | |
340 | resources = scpi_devs[i]->scan(drvc); | |
341 | for (l = resources; l; l = l->next) { | |
342 | res = g_strsplit(l->data, ":", 2); | |
343 | if (res[0] && (sdi = sr_scpi_scan_resource(drvc, res[0], | |
344 | serialcomm ? serialcomm : res[1], probe_device))) { | |
345 | devices = g_slist_append(devices, sdi); | |
346 | sdi->connection_id = g_strdup(l->data); | |
347 | } | |
348 | g_strfreev(res); | |
349 | } | |
350 | g_slist_free_full(resources, g_free); | |
351 | } | |
352 | ||
353 | if (!devices && resource) { | |
354 | sdi = sr_scpi_scan_resource(drvc, resource, serialcomm, probe_device); | |
355 | if (sdi) | |
356 | devices = g_slist_append(NULL, sdi); | |
357 | } | |
358 | ||
359 | /* Tack a copy of the newly found devices onto the driver list. */ | |
360 | if (devices) | |
361 | drvc->instances = g_slist_concat(drvc->instances, g_slist_copy(devices)); | |
362 | ||
363 | return devices; | |
364 | } | |
365 | ||
366 | SR_PRIV struct sr_scpi_dev_inst *scpi_dev_inst_new(struct drv_context *drvc, | |
367 | const char *resource, const char *serialcomm) | |
368 | { | |
369 | struct sr_scpi_dev_inst *scpi = NULL; | |
370 | const struct sr_scpi_dev_inst *scpi_dev; | |
371 | gchar **params; | |
372 | unsigned i; | |
373 | ||
374 | for (i = 0; i < ARRAY_SIZE(scpi_devs); i++) { | |
375 | scpi_dev = scpi_devs[i]; | |
376 | if (!strncmp(resource, scpi_dev->prefix, strlen(scpi_dev->prefix))) { | |
377 | sr_dbg("Opening %s device %s.", scpi_dev->name, resource); | |
378 | scpi = g_malloc(sizeof(*scpi)); | |
379 | *scpi = *scpi_dev; | |
380 | scpi->priv = g_malloc0(scpi->priv_size); | |
381 | scpi->read_timeout_us = 1000 * 1000; | |
382 | params = g_strsplit(resource, "/", 0); | |
383 | if (scpi->dev_inst_new(scpi->priv, drvc, resource, | |
384 | params, serialcomm) != SR_OK) { | |
385 | sr_scpi_free(scpi); | |
386 | scpi = NULL; | |
387 | } | |
388 | g_strfreev(params); | |
389 | break; | |
390 | } | |
391 | } | |
392 | ||
393 | return scpi; | |
394 | } | |
395 | ||
396 | /** | |
397 | * Open SCPI device. | |
398 | * | |
399 | * @param scpi Previously initialized SCPI device structure. | |
400 | * | |
401 | * @return SR_OK on success, SR_ERR on failure. | |
402 | */ | |
403 | SR_PRIV int sr_scpi_open(struct sr_scpi_dev_inst *scpi) | |
404 | { | |
405 | g_mutex_init(&scpi->scpi_mutex); | |
406 | ||
407 | return scpi->open(scpi); | |
408 | } | |
409 | ||
410 | /** | |
411 | * Add an event source for an SCPI device. | |
412 | * | |
413 | * @param session The session to add the event source to. | |
414 | * @param scpi Previously initialized SCPI device structure. | |
415 | * @param events Events to check for. | |
416 | * @param timeout Max time to wait before the callback is called, ignored if 0. | |
417 | * @param cb Callback function to add. Must not be NULL. | |
418 | * @param cb_data Data for the callback function. Can be NULL. | |
419 | * | |
420 | * @return SR_OK upon success, SR_ERR_ARG upon invalid arguments, or | |
421 | * SR_ERR_MALLOC upon memory allocation errors. | |
422 | */ | |
423 | SR_PRIV int sr_scpi_source_add(struct sr_session *session, | |
424 | struct sr_scpi_dev_inst *scpi, int events, int timeout, | |
425 | sr_receive_data_callback cb, void *cb_data) | |
426 | { | |
427 | return scpi->source_add(session, scpi->priv, events, timeout, cb, cb_data); | |
428 | } | |
429 | ||
430 | /** | |
431 | * Remove event source for an SCPI device. | |
432 | * | |
433 | * @param session The session to remove the event source from. | |
434 | * @param scpi Previously initialized SCPI device structure. | |
435 | * | |
436 | * @return SR_OK upon success, SR_ERR_ARG upon invalid arguments, or | |
437 | * SR_ERR_MALLOC upon memory allocation errors, SR_ERR_BUG upon | |
438 | * internal errors. | |
439 | */ | |
440 | SR_PRIV int sr_scpi_source_remove(struct sr_session *session, | |
441 | struct sr_scpi_dev_inst *scpi) | |
442 | { | |
443 | return scpi->source_remove(session, scpi->priv); | |
444 | } | |
445 | ||
446 | /** | |
447 | * Send a SCPI command. | |
448 | * | |
449 | * @param scpi Previously initialized SCPI device structure. | |
450 | * @param format Format string, to be followed by any necessary arguments. | |
451 | * | |
452 | * @return SR_OK on success, SR_ERR on failure. | |
453 | */ | |
454 | SR_PRIV int sr_scpi_send(struct sr_scpi_dev_inst *scpi, | |
455 | const char *format, ...) | |
456 | { | |
457 | va_list args; | |
458 | int ret; | |
459 | ||
460 | va_start(args, format); | |
461 | g_mutex_lock(&scpi->scpi_mutex); | |
462 | ret = scpi_send_variadic(scpi, format, args); | |
463 | g_mutex_unlock(&scpi->scpi_mutex); | |
464 | va_end(args); | |
465 | ||
466 | return ret; | |
467 | } | |
468 | ||
469 | /** | |
470 | * Send a SCPI command with a variadic argument list. | |
471 | * | |
472 | * @param scpi Previously initialized SCPI device structure. | |
473 | * @param format Format string. | |
474 | * @param args Argument list. | |
475 | * | |
476 | * @return SR_OK on success, SR_ERR on failure. | |
477 | */ | |
478 | SR_PRIV int sr_scpi_send_variadic(struct sr_scpi_dev_inst *scpi, | |
479 | const char *format, va_list args) | |
480 | { | |
481 | int ret; | |
482 | ||
483 | g_mutex_lock(&scpi->scpi_mutex); | |
484 | ret = scpi_send_variadic(scpi, format, args); | |
485 | g_mutex_unlock(&scpi->scpi_mutex); | |
486 | ||
487 | return ret; | |
488 | } | |
489 | ||
490 | /** | |
491 | * Begin receiving an SCPI reply. | |
492 | * | |
493 | * @param scpi Previously initialised SCPI device structure. | |
494 | * | |
495 | * @return SR_OK on success, SR_ERR on failure. | |
496 | */ | |
497 | SR_PRIV int sr_scpi_read_begin(struct sr_scpi_dev_inst *scpi) | |
498 | { | |
499 | return scpi->read_begin(scpi->priv); | |
500 | } | |
501 | ||
502 | /** | |
503 | * Read part of a response from SCPI device. | |
504 | * | |
505 | * @param scpi Previously initialised SCPI device structure. | |
506 | * @param buf Buffer to store result. | |
507 | * @param maxlen Maximum number of bytes to read. | |
508 | * | |
509 | * @return Number of bytes read, or SR_ERR upon failure. | |
510 | */ | |
511 | SR_PRIV int sr_scpi_read_data(struct sr_scpi_dev_inst *scpi, | |
512 | char *buf, int maxlen) | |
513 | { | |
514 | int ret; | |
515 | ||
516 | g_mutex_lock(&scpi->scpi_mutex); | |
517 | ret = scpi_read_data(scpi, buf, maxlen); | |
518 | g_mutex_unlock(&scpi->scpi_mutex); | |
519 | ||
520 | return ret; | |
521 | } | |
522 | ||
523 | /** | |
524 | * Send data to SCPI device. | |
525 | * | |
526 | * TODO: This is only implemented in TcpRaw, but never used. | |
527 | * TODO: Use Mutex at all? | |
528 | * | |
529 | * @param scpi Previously initialised SCPI device structure. | |
530 | * @param buf Buffer with data to send. | |
531 | * @param len Number of bytes to send. | |
532 | * | |
533 | * @return Number of bytes read, or SR_ERR upon failure. | |
534 | */ | |
535 | SR_PRIV int sr_scpi_write_data(struct sr_scpi_dev_inst *scpi, | |
536 | char *buf, int maxlen) | |
537 | { | |
538 | int ret; | |
539 | ||
540 | g_mutex_lock(&scpi->scpi_mutex); | |
541 | ret = scpi_write_data(scpi, buf, maxlen); | |
542 | g_mutex_unlock(&scpi->scpi_mutex); | |
543 | ||
544 | return ret; | |
545 | } | |
546 | ||
547 | /** | |
548 | * Check whether a complete SCPI response has been received. | |
549 | * | |
550 | * @param scpi Previously initialised SCPI device structure. | |
551 | * | |
552 | * @return 1 if complete, 0 otherwise. | |
553 | */ | |
554 | SR_PRIV int sr_scpi_read_complete(struct sr_scpi_dev_inst *scpi) | |
555 | { | |
556 | return scpi->read_complete(scpi->priv); | |
557 | } | |
558 | ||
559 | /** | |
560 | * Close SCPI device. | |
561 | * | |
562 | * @param scpi Previously initialized SCPI device structure. | |
563 | * | |
564 | * @return SR_OK on success, SR_ERR on failure. | |
565 | */ | |
566 | SR_PRIV int sr_scpi_close(struct sr_scpi_dev_inst *scpi) | |
567 | { | |
568 | int ret; | |
569 | ||
570 | g_mutex_lock(&scpi->scpi_mutex); | |
571 | ret = scpi->close(scpi); | |
572 | g_mutex_unlock(&scpi->scpi_mutex); | |
573 | g_mutex_clear(&scpi->scpi_mutex); | |
574 | ||
575 | return ret; | |
576 | } | |
577 | ||
578 | /** | |
579 | * Free SCPI device. | |
580 | * | |
581 | * @param scpi Previously initialized SCPI device structure. If NULL, | |
582 | * this function does nothing. | |
583 | */ | |
584 | SR_PRIV void sr_scpi_free(struct sr_scpi_dev_inst *scpi) | |
585 | { | |
586 | if (!scpi) | |
587 | return; | |
588 | ||
589 | scpi->free(scpi->priv); | |
590 | g_free(scpi->priv); | |
591 | g_free(scpi->actual_channel_name); | |
592 | g_free(scpi); | |
593 | } | |
594 | ||
595 | /** | |
596 | * Send a SCPI command, receive the reply and store the reply in scpi_response. | |
597 | * | |
598 | * @param scpi Previously initialised SCPI device structure. | |
599 | * @param command The SCPI command to send to the device (can be NULL). | |
600 | * @param scpi_response Pointer where to store the SCPI response. | |
601 | * | |
602 | * @return SR_OK on success, SR_ERR* on failure. | |
603 | */ | |
604 | SR_PRIV int sr_scpi_get_string(struct sr_scpi_dev_inst *scpi, | |
605 | const char *command, char **scpi_response) | |
606 | { | |
607 | GString *response; | |
608 | response = g_string_sized_new(1024); | |
609 | ||
610 | if (sr_scpi_get_data(scpi, command, &response) != SR_OK) { | |
611 | if (response) | |
612 | g_string_free(response, TRUE); | |
613 | return SR_ERR; | |
614 | } | |
615 | ||
616 | /* Get rid of trailing linefeed if present */ | |
617 | if (response->len >= 1 && response->str[response->len - 1] == '\n') | |
618 | g_string_truncate(response, response->len - 1); | |
619 | ||
620 | /* Get rid of trailing carriage return if present */ | |
621 | if (response->len >= 1 && response->str[response->len - 1] == '\r') | |
622 | g_string_truncate(response, response->len - 1); | |
623 | ||
624 | sr_spew("Got response: '%.70s', length %" G_GSIZE_FORMAT ".", | |
625 | response->str, response->len); | |
626 | ||
627 | *scpi_response = g_string_free(response, FALSE); | |
628 | ||
629 | return SR_OK; | |
630 | } | |
631 | ||
632 | /** | |
633 | * Do a non-blocking read of up to the allocated length, and | |
634 | * check if a timeout has occured. | |
635 | * | |
636 | * @param scpi Previously initialised SCPI device structure. | |
637 | * @param response Buffer to which the response is appended. | |
638 | * @param abs_timeout_us Absolute timeout in microseconds | |
639 | * | |
640 | * @return read length on success, SR_ERR* on failure. | |
641 | */ | |
642 | SR_PRIV int sr_scpi_read_response(struct sr_scpi_dev_inst *scpi, | |
643 | GString *response, gint64 abs_timeout_us) | |
644 | { | |
645 | int ret; | |
646 | ||
647 | g_mutex_lock(&scpi->scpi_mutex); | |
648 | ret = scpi_read_response(scpi, response, abs_timeout_us); | |
649 | g_mutex_unlock(&scpi->scpi_mutex); | |
650 | ||
651 | return ret; | |
652 | } | |
653 | ||
654 | SR_PRIV int sr_scpi_get_data(struct sr_scpi_dev_inst *scpi, | |
655 | const char *command, GString **scpi_response) | |
656 | { | |
657 | int ret; | |
658 | ||
659 | g_mutex_lock(&scpi->scpi_mutex); | |
660 | ret = scpi_get_data(scpi, command, scpi_response); | |
661 | g_mutex_unlock(&scpi->scpi_mutex); | |
662 | ||
663 | return ret; | |
664 | } | |
665 | ||
666 | /** | |
667 | * Send a SCPI command, read the reply, parse it as a bool value and store the | |
668 | * result in scpi_response. | |
669 | * | |
670 | * @param scpi Previously initialised SCPI device structure. | |
671 | * @param command The SCPI command to send to the device (can be NULL). | |
672 | * @param scpi_response Pointer where to store the parsed result. | |
673 | * | |
674 | * @return SR_OK on success, SR_ERR* on failure. | |
675 | */ | |
676 | SR_PRIV int sr_scpi_get_bool(struct sr_scpi_dev_inst *scpi, | |
677 | const char *command, gboolean *scpi_response) | |
678 | { | |
679 | int ret; | |
680 | char *response; | |
681 | ||
682 | response = NULL; | |
683 | ||
684 | ret = sr_scpi_get_string(scpi, command, &response); | |
685 | if (ret != SR_OK && !response) | |
686 | return ret; | |
687 | ||
688 | if (parse_strict_bool(response, scpi_response) == SR_OK) | |
689 | ret = SR_OK; | |
690 | else | |
691 | ret = SR_ERR_DATA; | |
692 | ||
693 | g_free(response); | |
694 | ||
695 | return ret; | |
696 | } | |
697 | ||
698 | /** | |
699 | * Send a SCPI command, read the reply, parse it as an integer and store the | |
700 | * result in scpi_response. | |
701 | * | |
702 | * @param scpi Previously initialised SCPI device structure. | |
703 | * @param command The SCPI command to send to the device (can be NULL). | |
704 | * @param scpi_response Pointer where to store the parsed result. | |
705 | * | |
706 | * @return SR_OK on success, SR_ERR* on failure. | |
707 | */ | |
708 | SR_PRIV int sr_scpi_get_int(struct sr_scpi_dev_inst *scpi, | |
709 | const char *command, int *scpi_response) | |
710 | { | |
711 | int ret; | |
712 | char *response; | |
713 | ||
714 | response = NULL; | |
715 | ||
716 | ret = sr_scpi_get_string(scpi, command, &response); | |
717 | if (ret != SR_OK && !response) | |
718 | return ret; | |
719 | ||
720 | if (sr_atoi(response, scpi_response) == SR_OK) | |
721 | ret = SR_OK; | |
722 | else | |
723 | ret = SR_ERR_DATA; | |
724 | ||
725 | g_free(response); | |
726 | ||
727 | return ret; | |
728 | } | |
729 | ||
730 | /** | |
731 | * Send a SCPI command, read the reply, parse it as a float and store the | |
732 | * result in scpi_response. | |
733 | * | |
734 | * @param scpi Previously initialised SCPI device structure. | |
735 | * @param command The SCPI command to send to the device (can be NULL). | |
736 | * @param scpi_response Pointer where to store the parsed result. | |
737 | * | |
738 | * @return SR_OK on success, SR_ERR* on failure. | |
739 | */ | |
740 | SR_PRIV int sr_scpi_get_float(struct sr_scpi_dev_inst *scpi, | |
741 | const char *command, float *scpi_response) | |
742 | { | |
743 | int ret; | |
744 | char *response; | |
745 | ||
746 | response = NULL; | |
747 | ||
748 | ret = sr_scpi_get_string(scpi, command, &response); | |
749 | if (ret != SR_OK && !response) | |
750 | return ret; | |
751 | ||
752 | if (sr_atof_ascii(response, scpi_response) == SR_OK) | |
753 | ret = SR_OK; | |
754 | else | |
755 | ret = SR_ERR_DATA; | |
756 | ||
757 | g_free(response); | |
758 | ||
759 | return ret; | |
760 | } | |
761 | ||
762 | /** | |
763 | * Send a SCPI command, read the reply, parse it as a double and store the | |
764 | * result in scpi_response. | |
765 | * | |
766 | * @param scpi Previously initialised SCPI device structure. | |
767 | * @param command The SCPI command to send to the device (can be NULL). | |
768 | * @param scpi_response Pointer where to store the parsed result. | |
769 | * | |
770 | * @return SR_OK on success, SR_ERR* on failure. | |
771 | */ | |
772 | SR_PRIV int sr_scpi_get_double(struct sr_scpi_dev_inst *scpi, | |
773 | const char *command, double *scpi_response) | |
774 | { | |
775 | int ret; | |
776 | char *response; | |
777 | ||
778 | response = NULL; | |
779 | ||
780 | ret = sr_scpi_get_string(scpi, command, &response); | |
781 | if (ret != SR_OK && !response) | |
782 | return ret; | |
783 | ||
784 | if (sr_atod_ascii(response, scpi_response) == SR_OK) | |
785 | ret = SR_OK; | |
786 | else | |
787 | ret = SR_ERR_DATA; | |
788 | ||
789 | g_free(response); | |
790 | ||
791 | return ret; | |
792 | } | |
793 | ||
794 | /** | |
795 | * Send a SCPI *OPC? command, read the reply and return the result of the | |
796 | * command. | |
797 | * | |
798 | * @param scpi Previously initialised SCPI device structure. | |
799 | * | |
800 | * @return SR_OK on success, SR_ERR* on failure. | |
801 | */ | |
802 | SR_PRIV int sr_scpi_get_opc(struct sr_scpi_dev_inst *scpi) | |
803 | { | |
804 | unsigned int i; | |
805 | gboolean opc; | |
806 | ||
807 | for (i = 0; i < SCPI_READ_RETRIES; i++) { | |
808 | opc = FALSE; | |
809 | sr_scpi_get_bool(scpi, SCPI_CMD_OPC, &opc); | |
810 | if (opc) | |
811 | return SR_OK; | |
812 | g_usleep(SCPI_READ_RETRY_TIMEOUT_US); | |
813 | } | |
814 | ||
815 | return SR_ERR; | |
816 | } | |
817 | ||
818 | /** | |
819 | * Send a SCPI command, read the reply, parse it as comma separated list of | |
820 | * floats and store the as an result in scpi_response. | |
821 | * | |
822 | * @param scpi Previously initialised SCPI device structure. | |
823 | * @param command The SCPI command to send to the device (can be NULL). | |
824 | * @param scpi_response Pointer where to store the parsed result. | |
825 | * | |
826 | * @return SR_OK upon successfully parsing all values, SR_ERR* upon a parsing | |
827 | * error or upon no response. The allocated response must be freed by | |
828 | * the caller in the case of an SR_OK as well as in the case of | |
829 | * parsing error. | |
830 | */ | |
831 | SR_PRIV int sr_scpi_get_floatv(struct sr_scpi_dev_inst *scpi, | |
832 | const char *command, GArray **scpi_response) | |
833 | { | |
834 | int ret; | |
835 | float tmp; | |
836 | char *response; | |
837 | gchar **ptr, **tokens; | |
838 | GArray *response_array; | |
839 | ||
840 | response = NULL; | |
841 | tokens = NULL; | |
842 | ||
843 | ret = sr_scpi_get_string(scpi, command, &response); | |
844 | if (ret != SR_OK && !response) | |
845 | return ret; | |
846 | ||
847 | tokens = g_strsplit(response, ",", 0); | |
848 | ptr = tokens; | |
849 | ||
850 | response_array = g_array_sized_new(TRUE, FALSE, sizeof(float), 256); | |
851 | ||
852 | while (*ptr) { | |
853 | if (sr_atof_ascii(*ptr, &tmp) == SR_OK) | |
854 | response_array = g_array_append_val(response_array, | |
855 | tmp); | |
856 | else | |
857 | ret = SR_ERR_DATA; | |
858 | ||
859 | ptr++; | |
860 | } | |
861 | g_strfreev(tokens); | |
862 | g_free(response); | |
863 | ||
864 | if (ret != SR_OK && response_array->len == 0) { | |
865 | g_array_free(response_array, TRUE); | |
866 | *scpi_response = NULL; | |
867 | return SR_ERR_DATA; | |
868 | } | |
869 | ||
870 | *scpi_response = response_array; | |
871 | ||
872 | return ret; | |
873 | } | |
874 | ||
875 | /** | |
876 | * Send a SCPI command, read the reply, parse it as comma separated list of | |
877 | * unsigned 8 bit integers and store the as an result in scpi_response. | |
878 | * | |
879 | * @param scpi Previously initialised SCPI device structure. | |
880 | * @param command The SCPI command to send to the device (can be NULL). | |
881 | * @param scpi_response Pointer where to store the parsed result. | |
882 | * | |
883 | * @return SR_OK upon successfully parsing all values, SR_ERR* upon a parsing | |
884 | * error or upon no response. The allocated response must be freed by | |
885 | * the caller in the case of an SR_OK as well as in the case of | |
886 | * parsing error. | |
887 | */ | |
888 | SR_PRIV int sr_scpi_get_uint8v(struct sr_scpi_dev_inst *scpi, | |
889 | const char *command, GArray **scpi_response) | |
890 | { | |
891 | int tmp, ret; | |
892 | char *response; | |
893 | gchar **ptr, **tokens; | |
894 | GArray *response_array; | |
895 | ||
896 | response = NULL; | |
897 | tokens = NULL; | |
898 | ||
899 | ret = sr_scpi_get_string(scpi, command, &response); | |
900 | if (ret != SR_OK && !response) | |
901 | return ret; | |
902 | ||
903 | tokens = g_strsplit(response, ",", 0); | |
904 | ptr = tokens; | |
905 | ||
906 | response_array = g_array_sized_new(TRUE, FALSE, sizeof(uint8_t), 256); | |
907 | ||
908 | while (*ptr) { | |
909 | if (sr_atoi(*ptr, &tmp) == SR_OK) | |
910 | response_array = g_array_append_val(response_array, | |
911 | tmp); | |
912 | else | |
913 | ret = SR_ERR_DATA; | |
914 | ||
915 | ptr++; | |
916 | } | |
917 | g_strfreev(tokens); | |
918 | g_free(response); | |
919 | ||
920 | if (response_array->len == 0) { | |
921 | g_array_free(response_array, TRUE); | |
922 | *scpi_response = NULL; | |
923 | return SR_ERR_DATA; | |
924 | } | |
925 | ||
926 | *scpi_response = response_array; | |
927 | ||
928 | return ret; | |
929 | } | |
930 | ||
931 | /** | |
932 | * Send a SCPI command, read the reply, parse it as binary data with a | |
933 | * "definite length block" header and store the as an result in scpi_response. | |
934 | * | |
935 | * @param scpi Previously initialised SCPI device structure. | |
936 | * @param command The SCPI command to send to the device (can be NULL). | |
937 | * @param scpi_response Pointer where to store the parsed result. | |
938 | * | |
939 | * @return SR_OK upon successfully parsing all values, SR_ERR* upon a parsing | |
940 | * error or upon no response. The allocated response must be freed by | |
941 | * the caller in the case of an SR_OK as well as in the case of | |
942 | * parsing error. | |
943 | */ | |
944 | SR_PRIV int sr_scpi_get_block(struct sr_scpi_dev_inst *scpi, | |
945 | const char *command, GByteArray **scpi_response) | |
946 | { | |
947 | int ret; | |
948 | GString* response; | |
949 | char buf[10]; | |
950 | long llen; | |
951 | long datalen; | |
952 | gint64 timeout; | |
953 | ||
954 | g_mutex_lock(&scpi->scpi_mutex); | |
955 | ||
956 | if (command) | |
957 | if (scpi_send(scpi, command) != SR_OK) { | |
958 | g_mutex_unlock(&scpi->scpi_mutex); | |
959 | return SR_ERR; | |
960 | } | |
961 | ||
962 | if (sr_scpi_read_begin(scpi) != SR_OK) { | |
963 | g_mutex_unlock(&scpi->scpi_mutex); | |
964 | return SR_ERR; | |
965 | } | |
966 | ||
967 | /* | |
968 | * Assume an initial maximum length, optionally gets adjusted below. | |
969 | * Prepare a NULL return value for when error paths will be taken. | |
970 | */ | |
971 | response = g_string_sized_new(1024); | |
972 | ||
973 | timeout = g_get_monotonic_time() + scpi->read_timeout_us; | |
974 | ||
975 | *scpi_response = NULL; | |
976 | ||
977 | /* Get (the first chunk of) the response. */ | |
978 | while (response->len < 2) { | |
979 | ret = scpi_read_response(scpi, response, timeout); | |
980 | if (ret < 0) { | |
981 | g_mutex_unlock(&scpi->scpi_mutex); | |
982 | g_string_free(response, TRUE); | |
983 | return ret; | |
984 | } | |
985 | } | |
986 | ||
987 | /* | |
988 | * SCPI protocol data blocks are preceeded with a length spec. | |
989 | * The length spec consists of a '#' marker, one digit which | |
990 | * specifies the character count of the length spec, and the | |
991 | * respective number of characters which specify the data block's | |
992 | * length. Raw data bytes follow (thus one must no longer assume | |
993 | * that the received input stream would be an ASCIIZ string). | |
994 | * | |
995 | * Get the data block length, and strip off the length spec from | |
996 | * the input buffer, leaving just the data bytes. | |
997 | */ | |
998 | if (response->str[0] != '#') { | |
999 | g_mutex_unlock(&scpi->scpi_mutex); | |
1000 | g_string_free(response, TRUE); | |
1001 | return SR_ERR_DATA; | |
1002 | } | |
1003 | buf[0] = response->str[1]; | |
1004 | buf[1] = '\0'; | |
1005 | ret = sr_atol(buf, &llen); | |
1006 | if ((ret != SR_OK) || (llen == 0)) { | |
1007 | g_mutex_unlock(&scpi->scpi_mutex); | |
1008 | g_string_free(response, TRUE); | |
1009 | return ret; | |
1010 | } | |
1011 | ||
1012 | while (response->len < (unsigned long)(2 + llen)) { | |
1013 | ret = scpi_read_response(scpi, response, timeout); | |
1014 | if (ret < 0) { | |
1015 | g_mutex_unlock(&scpi->scpi_mutex); | |
1016 | g_string_free(response, TRUE); | |
1017 | return ret; | |
1018 | } | |
1019 | } | |
1020 | ||
1021 | memcpy(buf, &response->str[2], llen); | |
1022 | buf[llen] = '\0'; | |
1023 | ret = sr_atol(buf, &datalen); | |
1024 | if ((ret != SR_OK) || (datalen == 0)) { | |
1025 | g_mutex_unlock(&scpi->scpi_mutex); | |
1026 | g_string_free(response, TRUE); | |
1027 | return ret; | |
1028 | } | |
1029 | g_string_erase(response, 0, 2 + llen); | |
1030 | ||
1031 | /* | |
1032 | * If the initially assumed length does not cover the data block | |
1033 | * length, then re-allocate the buffer size to the now known | |
1034 | * length, and keep reading more chunks of response data. | |
1035 | */ | |
1036 | if (response->len < (unsigned long)(datalen)) { | |
1037 | int oldlen = response->len; | |
1038 | g_string_set_size(response, datalen); | |
1039 | g_string_set_size(response, oldlen); | |
1040 | } | |
1041 | ||
1042 | while (response->len < (unsigned long)(datalen)) { | |
1043 | ret = scpi_read_response(scpi, response, timeout); | |
1044 | if (ret < 0) { | |
1045 | g_mutex_unlock(&scpi->scpi_mutex); | |
1046 | g_string_free(response, TRUE); | |
1047 | return ret; | |
1048 | } | |
1049 | if (ret > 0) | |
1050 | timeout = g_get_monotonic_time() + scpi->read_timeout_us; | |
1051 | } | |
1052 | ||
1053 | g_mutex_unlock(&scpi->scpi_mutex); | |
1054 | ||
1055 | /* Convert received data to byte array. */ | |
1056 | *scpi_response = g_byte_array_new_take( | |
1057 | (guint8*)g_string_free(response, FALSE), datalen); | |
1058 | ||
1059 | return SR_OK; | |
1060 | } | |
1061 | ||
1062 | /** | |
1063 | * Send the *IDN? SCPI command, receive the reply, parse it and store the | |
1064 | * reply as a sr_scpi_hw_info structure in the supplied scpi_response pointer. | |
1065 | * | |
1066 | * The hw_info structure must be freed by the caller via sr_scpi_hw_info_free(). | |
1067 | * | |
1068 | * @param scpi Previously initialised SCPI device structure. | |
1069 | * @param scpi_response Pointer where to store the hw_info structure. | |
1070 | * | |
1071 | * @return SR_OK upon success, SR_ERR* on failure. | |
1072 | */ | |
1073 | SR_PRIV int sr_scpi_get_hw_id(struct sr_scpi_dev_inst *scpi, | |
1074 | struct sr_scpi_hw_info **scpi_response) | |
1075 | { | |
1076 | int num_tokens, ret; | |
1077 | char *response; | |
1078 | gchar **tokens; | |
1079 | struct sr_scpi_hw_info *hw_info; | |
1080 | gchar *idn_substr; | |
1081 | ||
1082 | response = NULL; | |
1083 | tokens = NULL; | |
1084 | ||
1085 | ret = sr_scpi_get_string(scpi, SCPI_CMD_IDN, &response); | |
1086 | if (ret != SR_OK && !response) | |
1087 | return ret; | |
1088 | ||
1089 | /* | |
1090 | * The response to a '*IDN?' is specified by the SCPI spec. It contains | |
1091 | * a comma-separated list containing the manufacturer name, instrument | |
1092 | * model, serial number of the instrument and the firmware version. | |
1093 | */ | |
1094 | tokens = g_strsplit(response, ",", 0); | |
1095 | num_tokens = g_strv_length(tokens); | |
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 | /** | |
1142 | * Remove potentially enclosing pairs of quotes, un-escape content. | |
1143 | * This implementation modifies the caller's buffer when quotes are found | |
1144 | * and doubled quote characters need to get removed from the content. | |
1145 | * | |
1146 | * @param[in, out] s The SCPI string to check and un-quote. | |
1147 | * | |
1148 | * @return The start of the un-quoted string. | |
1149 | */ | |
1150 | SR_PRIV const char *sr_scpi_unquote_string(char *s) | |
1151 | { | |
1152 | size_t s_len; | |
1153 | char quotes[3]; | |
1154 | char *rdptr; | |
1155 | ||
1156 | /* Immediately bail out on invalid or short input. */ | |
1157 | if (!s || !*s) | |
1158 | return s; | |
1159 | s_len = strlen(s); | |
1160 | if (s_len < 2) | |
1161 | return s; | |
1162 | ||
1163 | /* Check for matching quote characters front and back. */ | |
1164 | if (s[0] != '\'' && s[0] != '"') | |
1165 | return s; | |
1166 | if (s[0] != s[s_len - 1]) | |
1167 | return s; | |
1168 | ||
1169 | /* Need to strip quotes, and un-double quote chars inside. */ | |
1170 | quotes[0] = quotes[1] = *s; | |
1171 | quotes[2] = '\0'; | |
1172 | s[s_len - 1] = '\0'; | |
1173 | s++; | |
1174 | rdptr = s; | |
1175 | while ((rdptr = strstr(rdptr, quotes)) != NULL) { | |
1176 | memmove(rdptr, rdptr + 1, strlen(rdptr)); | |
1177 | rdptr++; | |
1178 | } | |
1179 | ||
1180 | return s; | |
1181 | } | |
1182 | ||
1183 | SR_PRIV const char *sr_vendor_alias(const char *raw_vendor) | |
1184 | { | |
1185 | unsigned int i; | |
1186 | ||
1187 | for (i = 0; i < ARRAY_SIZE(scpi_vendors); i++) { | |
1188 | if (!g_ascii_strcasecmp(raw_vendor, scpi_vendors[i][0])) | |
1189 | return scpi_vendors[i][1]; | |
1190 | } | |
1191 | ||
1192 | return raw_vendor; | |
1193 | } | |
1194 | ||
1195 | SR_PRIV const char *sr_scpi_cmd_get(const struct scpi_command *cmdtable, | |
1196 | int command) | |
1197 | { | |
1198 | unsigned int i; | |
1199 | const char *cmd; | |
1200 | ||
1201 | if (!cmdtable) | |
1202 | return NULL; | |
1203 | ||
1204 | cmd = NULL; | |
1205 | for (i = 0; cmdtable[i].string; i++) { | |
1206 | if (cmdtable[i].command == command) { | |
1207 | cmd = cmdtable[i].string; | |
1208 | break; | |
1209 | } | |
1210 | } | |
1211 | ||
1212 | return cmd; | |
1213 | } | |
1214 | ||
1215 | SR_PRIV int sr_scpi_cmd(const struct sr_dev_inst *sdi, | |
1216 | const struct scpi_command *cmdtable, | |
1217 | int channel_command, const char *channel_name, | |
1218 | int command, ...) | |
1219 | { | |
1220 | struct sr_scpi_dev_inst *scpi; | |
1221 | va_list args; | |
1222 | int ret; | |
1223 | const char *channel_cmd; | |
1224 | const char *cmd; | |
1225 | ||
1226 | scpi = sdi->conn; | |
1227 | ||
1228 | if (!(cmd = sr_scpi_cmd_get(cmdtable, command))) { | |
1229 | /* Device does not implement this command, that's OK. */ | |
1230 | return SR_OK; | |
1231 | } | |
1232 | ||
1233 | g_mutex_lock(&scpi->scpi_mutex); | |
1234 | ||
1235 | /* Select channel. */ | |
1236 | channel_cmd = sr_scpi_cmd_get(cmdtable, channel_command); | |
1237 | if (channel_cmd && channel_name && | |
1238 | g_strcmp0(channel_name, scpi->actual_channel_name)) { | |
1239 | sr_spew("sr_scpi_cmd(): new channel = %s", channel_name); | |
1240 | g_free(scpi->actual_channel_name); | |
1241 | scpi->actual_channel_name = g_strdup(channel_name); | |
1242 | ret = scpi_send(scpi, channel_cmd, channel_name); | |
1243 | if (ret != SR_OK) | |
1244 | return ret; | |
1245 | } | |
1246 | ||
1247 | va_start(args, command); | |
1248 | ret = scpi_send_variadic(scpi, cmd, args); | |
1249 | va_end(args); | |
1250 | ||
1251 | g_mutex_unlock(&scpi->scpi_mutex); | |
1252 | ||
1253 | return ret; | |
1254 | } | |
1255 | ||
1256 | SR_PRIV int sr_scpi_cmd_resp(const struct sr_dev_inst *sdi, | |
1257 | const struct scpi_command *cmdtable, | |
1258 | int channel_command, const char *channel_name, | |
1259 | GVariant **gvar, const GVariantType *gvtype, int command, ...) | |
1260 | { | |
1261 | struct sr_scpi_dev_inst *scpi; | |
1262 | va_list args; | |
1263 | const char *channel_cmd; | |
1264 | const char *cmd; | |
1265 | GString *response; | |
1266 | char *s; | |
1267 | gboolean b; | |
1268 | double d; | |
1269 | int ret; | |
1270 | ||
1271 | scpi = sdi->conn; | |
1272 | ||
1273 | if (!(cmd = sr_scpi_cmd_get(cmdtable, command))) { | |
1274 | /* Device does not implement this command. */ | |
1275 | return SR_ERR_NA; | |
1276 | } | |
1277 | ||
1278 | g_mutex_lock(&scpi->scpi_mutex); | |
1279 | ||
1280 | /* Select channel. */ | |
1281 | channel_cmd = sr_scpi_cmd_get(cmdtable, channel_command); | |
1282 | if (channel_cmd && channel_name && | |
1283 | g_strcmp0(channel_name, scpi->actual_channel_name)) { | |
1284 | sr_spew("sr_scpi_cmd_get(): new channel = %s", channel_name); | |
1285 | g_free(scpi->actual_channel_name); | |
1286 | scpi->actual_channel_name = g_strdup(channel_name); | |
1287 | ret = scpi_send(scpi, channel_cmd, channel_name); | |
1288 | if (ret != SR_OK) | |
1289 | return ret; | |
1290 | } | |
1291 | ||
1292 | va_start(args, command); | |
1293 | ret = scpi_send_variadic(scpi, cmd, args); | |
1294 | va_end(args); | |
1295 | if (ret != SR_OK) { | |
1296 | g_mutex_unlock(&scpi->scpi_mutex); | |
1297 | return ret; | |
1298 | } | |
1299 | ||
1300 | response = g_string_sized_new(1024); | |
1301 | ret = scpi_get_data(scpi, NULL, &response); | |
1302 | if (ret != SR_OK) { | |
1303 | g_mutex_unlock(&scpi->scpi_mutex); | |
1304 | if (response) | |
1305 | g_string_free(response, TRUE); | |
1306 | return ret; | |
1307 | } | |
1308 | ||
1309 | g_mutex_unlock(&scpi->scpi_mutex); | |
1310 | ||
1311 | /* Get rid of trailing linefeed if present */ | |
1312 | if (response->len >= 1 && response->str[response->len - 1] == '\n') | |
1313 | g_string_truncate(response, response->len - 1); | |
1314 | ||
1315 | /* Get rid of trailing carriage return if present */ | |
1316 | if (response->len >= 1 && response->str[response->len - 1] == '\r') | |
1317 | g_string_truncate(response, response->len - 1); | |
1318 | ||
1319 | s = g_string_free(response, FALSE); | |
1320 | ||
1321 | ret = SR_OK; | |
1322 | if (g_variant_type_equal(gvtype, G_VARIANT_TYPE_BOOLEAN)) { | |
1323 | if ((ret = parse_strict_bool(s, &b)) == SR_OK) | |
1324 | *gvar = g_variant_new_boolean(b); | |
1325 | } else if (g_variant_type_equal(gvtype, G_VARIANT_TYPE_DOUBLE)) { | |
1326 | if ((ret = sr_atod_ascii(s, &d)) == SR_OK) | |
1327 | *gvar = g_variant_new_double(d); | |
1328 | } else if (g_variant_type_equal(gvtype, G_VARIANT_TYPE_STRING)) { | |
1329 | *gvar = g_variant_new_string(s); | |
1330 | } else { | |
1331 | sr_err("Unable to convert to desired GVariant type."); | |
1332 | ret = SR_ERR_NA; | |
1333 | } | |
1334 | ||
1335 | g_free(s); | |
1336 | ||
1337 | return ret; | |
1338 | } |