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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_SERIAL_COMM | |
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, *conn; | |
319 | const char *serialcomm, *comm; | |
320 | gchar **res; | |
321 | unsigned i; | |
322 | ||
323 | resource = NULL; | |
324 | serialcomm = NULL; | |
325 | (void)sr_serial_extract_options(options, &resource, &serialcomm); | |
326 | ||
327 | devices = NULL; | |
328 | for (i = 0; i < ARRAY_SIZE(scpi_devs); i++) { | |
329 | if (resource && strcmp(resource, scpi_devs[i]->prefix) != 0) | |
330 | continue; | |
331 | if (!scpi_devs[i]->scan) | |
332 | continue; | |
333 | resources = scpi_devs[i]->scan(drvc); | |
334 | for (l = resources; l; l = l->next) { | |
335 | res = g_strsplit(l->data, ":", 2); | |
336 | if (!res[0]) { | |
337 | g_strfreev(res); | |
338 | continue; | |
339 | } | |
340 | conn = res[0]; | |
341 | comm = serialcomm ? : res[1]; | |
342 | sdi = sr_scpi_scan_resource(drvc, conn, comm, probe_device); | |
343 | if (sdi) { | |
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 | * Get the connection ID of the SCPI device. | |
411 | * | |
412 | * Callers must free the allocated memory regardless of the routine's | |
413 | * return code. See @ref g_free(). | |
414 | * | |
415 | * @param[in] scpi Previously initialized SCPI device structure. | |
416 | * @param[out] connection_id Pointer where to store the connection ID. | |
417 | * | |
418 | * @return SR_OK on success, SR_ERR on failure. | |
419 | */ | |
420 | SR_PRIV int sr_scpi_connection_id(struct sr_scpi_dev_inst *scpi, | |
421 | char **connection_id) | |
422 | { | |
423 | return scpi->connection_id(scpi, connection_id); | |
424 | } | |
425 | ||
426 | /** | |
427 | * Add an event source for an SCPI device. | |
428 | * | |
429 | * @param session The session to add the event source to. | |
430 | * @param scpi Previously initialized SCPI device structure. | |
431 | * @param events Events to check for. | |
432 | * @param timeout Max time to wait before the callback is called, ignored if 0. | |
433 | * @param cb Callback function to add. Must not be NULL. | |
434 | * @param cb_data Data for the callback function. Can be NULL. | |
435 | * | |
436 | * @return SR_OK upon success, SR_ERR_ARG upon invalid arguments, or | |
437 | * SR_ERR_MALLOC upon memory allocation errors. | |
438 | */ | |
439 | SR_PRIV int sr_scpi_source_add(struct sr_session *session, | |
440 | struct sr_scpi_dev_inst *scpi, int events, int timeout, | |
441 | sr_receive_data_callback cb, void *cb_data) | |
442 | { | |
443 | return scpi->source_add(session, scpi->priv, events, timeout, cb, cb_data); | |
444 | } | |
445 | ||
446 | /** | |
447 | * Remove event source for an SCPI device. | |
448 | * | |
449 | * @param session The session to remove the event source from. | |
450 | * @param scpi Previously initialized SCPI device structure. | |
451 | * | |
452 | * @return SR_OK upon success, SR_ERR_ARG upon invalid arguments, or | |
453 | * SR_ERR_MALLOC upon memory allocation errors, SR_ERR_BUG upon | |
454 | * internal errors. | |
455 | */ | |
456 | SR_PRIV int sr_scpi_source_remove(struct sr_session *session, | |
457 | struct sr_scpi_dev_inst *scpi) | |
458 | { | |
459 | return scpi->source_remove(session, scpi->priv); | |
460 | } | |
461 | ||
462 | /** | |
463 | * Send a SCPI command. | |
464 | * | |
465 | * @param scpi Previously initialized SCPI device structure. | |
466 | * @param format Format string, to be followed by any necessary arguments. | |
467 | * | |
468 | * @return SR_OK on success, SR_ERR on failure. | |
469 | */ | |
470 | SR_PRIV int sr_scpi_send(struct sr_scpi_dev_inst *scpi, | |
471 | const char *format, ...) | |
472 | { | |
473 | va_list args; | |
474 | int ret; | |
475 | ||
476 | va_start(args, format); | |
477 | g_mutex_lock(&scpi->scpi_mutex); | |
478 | ret = scpi_send_variadic(scpi, format, args); | |
479 | g_mutex_unlock(&scpi->scpi_mutex); | |
480 | va_end(args); | |
481 | ||
482 | return ret; | |
483 | } | |
484 | ||
485 | /** | |
486 | * Send a SCPI command with a variadic argument list. | |
487 | * | |
488 | * @param scpi Previously initialized SCPI device structure. | |
489 | * @param format Format string. | |
490 | * @param args Argument list. | |
491 | * | |
492 | * @return SR_OK on success, SR_ERR on failure. | |
493 | */ | |
494 | SR_PRIV int sr_scpi_send_variadic(struct sr_scpi_dev_inst *scpi, | |
495 | const char *format, va_list args) | |
496 | { | |
497 | int ret; | |
498 | ||
499 | g_mutex_lock(&scpi->scpi_mutex); | |
500 | ret = scpi_send_variadic(scpi, format, args); | |
501 | g_mutex_unlock(&scpi->scpi_mutex); | |
502 | ||
503 | return ret; | |
504 | } | |
505 | ||
506 | /** | |
507 | * Begin receiving an SCPI reply. | |
508 | * | |
509 | * @param scpi Previously initialised SCPI device structure. | |
510 | * | |
511 | * @return SR_OK on success, SR_ERR on failure. | |
512 | */ | |
513 | SR_PRIV int sr_scpi_read_begin(struct sr_scpi_dev_inst *scpi) | |
514 | { | |
515 | return scpi->read_begin(scpi->priv); | |
516 | } | |
517 | ||
518 | /** | |
519 | * Read part of a response from SCPI device. | |
520 | * | |
521 | * @param scpi Previously initialised SCPI device structure. | |
522 | * @param buf Buffer to store result. | |
523 | * @param maxlen Maximum number of bytes to read. | |
524 | * | |
525 | * @return Number of bytes read, or SR_ERR upon failure. | |
526 | */ | |
527 | SR_PRIV int sr_scpi_read_data(struct sr_scpi_dev_inst *scpi, | |
528 | char *buf, int maxlen) | |
529 | { | |
530 | int ret; | |
531 | ||
532 | g_mutex_lock(&scpi->scpi_mutex); | |
533 | ret = scpi_read_data(scpi, buf, maxlen); | |
534 | g_mutex_unlock(&scpi->scpi_mutex); | |
535 | ||
536 | return ret; | |
537 | } | |
538 | ||
539 | /** | |
540 | * Send data to SCPI device. | |
541 | * | |
542 | * TODO: This is only implemented in TcpRaw, but never used. | |
543 | * TODO: Use Mutex at all? | |
544 | * | |
545 | * @param scpi Previously initialised SCPI device structure. | |
546 | * @param buf Buffer with data to send. | |
547 | * @param len Number of bytes to send. | |
548 | * | |
549 | * @return Number of bytes read, or SR_ERR upon failure. | |
550 | */ | |
551 | SR_PRIV int sr_scpi_write_data(struct sr_scpi_dev_inst *scpi, | |
552 | char *buf, int maxlen) | |
553 | { | |
554 | int ret; | |
555 | ||
556 | g_mutex_lock(&scpi->scpi_mutex); | |
557 | ret = scpi_write_data(scpi, buf, maxlen); | |
558 | g_mutex_unlock(&scpi->scpi_mutex); | |
559 | ||
560 | return ret; | |
561 | } | |
562 | ||
563 | /** | |
564 | * Check whether a complete SCPI response has been received. | |
565 | * | |
566 | * @param scpi Previously initialised SCPI device structure. | |
567 | * | |
568 | * @return 1 if complete, 0 otherwise. | |
569 | */ | |
570 | SR_PRIV int sr_scpi_read_complete(struct sr_scpi_dev_inst *scpi) | |
571 | { | |
572 | return scpi->read_complete(scpi->priv); | |
573 | } | |
574 | ||
575 | /** | |
576 | * Close SCPI device. | |
577 | * | |
578 | * @param scpi Previously initialized SCPI device structure. | |
579 | * | |
580 | * @return SR_OK on success, SR_ERR on failure. | |
581 | */ | |
582 | SR_PRIV int sr_scpi_close(struct sr_scpi_dev_inst *scpi) | |
583 | { | |
584 | int ret; | |
585 | ||
586 | g_mutex_lock(&scpi->scpi_mutex); | |
587 | ret = scpi->close(scpi); | |
588 | g_mutex_unlock(&scpi->scpi_mutex); | |
589 | g_mutex_clear(&scpi->scpi_mutex); | |
590 | ||
591 | return ret; | |
592 | } | |
593 | ||
594 | /** | |
595 | * Free SCPI device. | |
596 | * | |
597 | * @param scpi Previously initialized SCPI device structure. If NULL, | |
598 | * this function does nothing. | |
599 | */ | |
600 | SR_PRIV void sr_scpi_free(struct sr_scpi_dev_inst *scpi) | |
601 | { | |
602 | if (!scpi) | |
603 | return; | |
604 | ||
605 | scpi->free(scpi->priv); | |
606 | g_free(scpi->priv); | |
607 | g_free(scpi->actual_channel_name); | |
608 | g_free(scpi); | |
609 | } | |
610 | ||
611 | /** | |
612 | * Send a SCPI command, receive the reply and store the reply in scpi_response. | |
613 | * | |
614 | * Callers must free the allocated memory regardless of the routine's | |
615 | * return code. See @ref g_free(). | |
616 | * | |
617 | * @param[in] scpi Previously initialised SCPI device structure. | |
618 | * @param[in] command The SCPI command to send to the device (can be NULL). | |
619 | * @param[out] scpi_response Pointer where to store the SCPI response. | |
620 | * | |
621 | * @return SR_OK on success, SR_ERR* on failure. | |
622 | */ | |
623 | SR_PRIV int sr_scpi_get_string(struct sr_scpi_dev_inst *scpi, | |
624 | const char *command, char **scpi_response) | |
625 | { | |
626 | GString *response; | |
627 | ||
628 | *scpi_response = NULL; | |
629 | ||
630 | response = g_string_sized_new(1024); | |
631 | if (sr_scpi_get_data(scpi, command, &response) != SR_OK) { | |
632 | if (response) | |
633 | g_string_free(response, TRUE); | |
634 | return SR_ERR; | |
635 | } | |
636 | ||
637 | /* Get rid of trailing linefeed if present */ | |
638 | if (response->len >= 1 && response->str[response->len - 1] == '\n') | |
639 | g_string_truncate(response, response->len - 1); | |
640 | ||
641 | /* Get rid of trailing carriage return if present */ | |
642 | if (response->len >= 1 && response->str[response->len - 1] == '\r') | |
643 | g_string_truncate(response, response->len - 1); | |
644 | ||
645 | sr_spew("Got response: '%.70s', length %" G_GSIZE_FORMAT ".", | |
646 | response->str, response->len); | |
647 | ||
648 | *scpi_response = g_string_free(response, FALSE); | |
649 | ||
650 | return SR_OK; | |
651 | } | |
652 | ||
653 | /** | |
654 | * Do a non-blocking read of up to the allocated length, and | |
655 | * check if a timeout has occured. | |
656 | * | |
657 | * @param scpi Previously initialised SCPI device structure. | |
658 | * @param response Buffer to which the response is appended. | |
659 | * @param abs_timeout_us Absolute timeout in microseconds | |
660 | * | |
661 | * @return read length on success, SR_ERR* on failure. | |
662 | */ | |
663 | SR_PRIV int sr_scpi_read_response(struct sr_scpi_dev_inst *scpi, | |
664 | GString *response, gint64 abs_timeout_us) | |
665 | { | |
666 | int ret; | |
667 | ||
668 | g_mutex_lock(&scpi->scpi_mutex); | |
669 | ret = scpi_read_response(scpi, response, abs_timeout_us); | |
670 | g_mutex_unlock(&scpi->scpi_mutex); | |
671 | ||
672 | return ret; | |
673 | } | |
674 | ||
675 | SR_PRIV int sr_scpi_get_data(struct sr_scpi_dev_inst *scpi, | |
676 | const char *command, GString **scpi_response) | |
677 | { | |
678 | int ret; | |
679 | ||
680 | g_mutex_lock(&scpi->scpi_mutex); | |
681 | ret = scpi_get_data(scpi, command, scpi_response); | |
682 | g_mutex_unlock(&scpi->scpi_mutex); | |
683 | ||
684 | return ret; | |
685 | } | |
686 | ||
687 | /** | |
688 | * Send a SCPI command, read the reply, parse it as a bool value and store the | |
689 | * result in scpi_response. | |
690 | * | |
691 | * @param scpi Previously initialised SCPI device structure. | |
692 | * @param command The SCPI command to send to the device (can be NULL). | |
693 | * @param scpi_response Pointer where to store the parsed result. | |
694 | * | |
695 | * @return SR_OK on success, SR_ERR* on failure. | |
696 | */ | |
697 | SR_PRIV int sr_scpi_get_bool(struct sr_scpi_dev_inst *scpi, | |
698 | const char *command, gboolean *scpi_response) | |
699 | { | |
700 | int ret; | |
701 | char *response; | |
702 | ||
703 | response = NULL; | |
704 | ||
705 | ret = sr_scpi_get_string(scpi, command, &response); | |
706 | if (ret != SR_OK && !response) | |
707 | return ret; | |
708 | ||
709 | if (parse_strict_bool(response, scpi_response) == SR_OK) | |
710 | ret = SR_OK; | |
711 | else | |
712 | ret = SR_ERR_DATA; | |
713 | ||
714 | g_free(response); | |
715 | ||
716 | return ret; | |
717 | } | |
718 | ||
719 | /** | |
720 | * Send a SCPI command, read the reply, parse it as an integer and store the | |
721 | * result in scpi_response. | |
722 | * | |
723 | * @param scpi Previously initialised SCPI device structure. | |
724 | * @param command The SCPI command to send to the device (can be NULL). | |
725 | * @param scpi_response Pointer where to store the parsed result. | |
726 | * | |
727 | * @return SR_OK on success, SR_ERR* on failure. | |
728 | */ | |
729 | SR_PRIV int sr_scpi_get_int(struct sr_scpi_dev_inst *scpi, | |
730 | const char *command, int *scpi_response) | |
731 | { | |
732 | int ret; | |
733 | struct sr_rational ret_rational; | |
734 | char *response; | |
735 | ||
736 | response = NULL; | |
737 | ||
738 | ret = sr_scpi_get_string(scpi, command, &response); | |
739 | if (ret != SR_OK && !response) | |
740 | return ret; | |
741 | ||
742 | ret = sr_parse_rational(response, &ret_rational); | |
743 | if (ret == SR_OK && (ret_rational.p % ret_rational.q) == 0) { | |
744 | *scpi_response = ret_rational.p / ret_rational.q; | |
745 | } else { | |
746 | sr_dbg("get_int: non-integer rational=%" PRId64 "/%" PRIu64, | |
747 | ret_rational.p, ret_rational.q); | |
748 | ret = SR_ERR_DATA; | |
749 | } | |
750 | ||
751 | g_free(response); | |
752 | ||
753 | return ret; | |
754 | } | |
755 | ||
756 | /** | |
757 | * Send a SCPI command, read the reply, parse it as a float and store the | |
758 | * result in scpi_response. | |
759 | * | |
760 | * @param scpi Previously initialised SCPI device structure. | |
761 | * @param command The SCPI command to send to the device (can be NULL). | |
762 | * @param scpi_response Pointer where to store the parsed result. | |
763 | * | |
764 | * @return SR_OK on success, SR_ERR* on failure. | |
765 | */ | |
766 | SR_PRIV int sr_scpi_get_float(struct sr_scpi_dev_inst *scpi, | |
767 | const char *command, float *scpi_response) | |
768 | { | |
769 | int ret; | |
770 | char *response; | |
771 | ||
772 | response = NULL; | |
773 | ||
774 | ret = sr_scpi_get_string(scpi, command, &response); | |
775 | if (ret != SR_OK && !response) | |
776 | return ret; | |
777 | ||
778 | if (sr_atof_ascii(response, scpi_response) == SR_OK) | |
779 | ret = SR_OK; | |
780 | else | |
781 | ret = SR_ERR_DATA; | |
782 | ||
783 | g_free(response); | |
784 | ||
785 | return ret; | |
786 | } | |
787 | ||
788 | /** | |
789 | * Send a SCPI command, read the reply, parse it as a double and store the | |
790 | * result in scpi_response. | |
791 | * | |
792 | * @param scpi Previously initialised SCPI device structure. | |
793 | * @param command The SCPI command to send to the device (can be NULL). | |
794 | * @param scpi_response Pointer where to store the parsed result. | |
795 | * | |
796 | * @return SR_OK on success, SR_ERR* on failure. | |
797 | */ | |
798 | SR_PRIV int sr_scpi_get_double(struct sr_scpi_dev_inst *scpi, | |
799 | const char *command, double *scpi_response) | |
800 | { | |
801 | int ret; | |
802 | char *response; | |
803 | ||
804 | response = NULL; | |
805 | ||
806 | ret = sr_scpi_get_string(scpi, command, &response); | |
807 | if (ret != SR_OK && !response) | |
808 | return ret; | |
809 | ||
810 | if (sr_atod_ascii(response, scpi_response) == SR_OK) | |
811 | ret = SR_OK; | |
812 | else | |
813 | ret = SR_ERR_DATA; | |
814 | ||
815 | g_free(response); | |
816 | ||
817 | return ret; | |
818 | } | |
819 | ||
820 | /** | |
821 | * Send a SCPI *OPC? command, read the reply and return the result of the | |
822 | * command. | |
823 | * | |
824 | * @param scpi Previously initialised SCPI device structure. | |
825 | * | |
826 | * @return SR_OK on success, SR_ERR* on failure. | |
827 | */ | |
828 | SR_PRIV int sr_scpi_get_opc(struct sr_scpi_dev_inst *scpi) | |
829 | { | |
830 | unsigned int i; | |
831 | gboolean opc; | |
832 | ||
833 | for (i = 0; i < SCPI_READ_RETRIES; i++) { | |
834 | opc = FALSE; | |
835 | sr_scpi_get_bool(scpi, SCPI_CMD_OPC, &opc); | |
836 | if (opc) | |
837 | return SR_OK; | |
838 | g_usleep(SCPI_READ_RETRY_TIMEOUT_US); | |
839 | } | |
840 | ||
841 | return SR_ERR; | |
842 | } | |
843 | ||
844 | /** | |
845 | * Send a SCPI command, read the reply, parse it as comma separated list of | |
846 | * floats and store the as an result in scpi_response. | |
847 | * | |
848 | * Callers must free the allocated memory (unless it's NULL) regardless of | |
849 | * the routine's return code. See @ref g_array_free(). | |
850 | * | |
851 | * @param[in] scpi Previously initialised SCPI device structure. | |
852 | * @param[in] command The SCPI command to send to the device (can be NULL). | |
853 | * @param[out] scpi_response Pointer where to store the parsed result. | |
854 | * | |
855 | * @return SR_OK upon successfully parsing all values, SR_ERR* upon a parsing | |
856 | * error or upon no response. | |
857 | */ | |
858 | SR_PRIV int sr_scpi_get_floatv(struct sr_scpi_dev_inst *scpi, | |
859 | const char *command, GArray **scpi_response) | |
860 | { | |
861 | int ret; | |
862 | float tmp; | |
863 | char *response; | |
864 | gchar **ptr, **tokens; | |
865 | size_t token_count; | |
866 | GArray *response_array; | |
867 | ||
868 | *scpi_response = NULL; | |
869 | ||
870 | response = NULL; | |
871 | ret = sr_scpi_get_string(scpi, command, &response); | |
872 | if (ret != SR_OK && !response) | |
873 | return ret; | |
874 | ||
875 | tokens = g_strsplit(response, ",", 0); | |
876 | token_count = g_strv_length(tokens); | |
877 | ||
878 | response_array = g_array_sized_new(TRUE, FALSE, | |
879 | sizeof(float), token_count + 1); | |
880 | ||
881 | ptr = tokens; | |
882 | while (*ptr) { | |
883 | ret = sr_atof_ascii(*ptr, &tmp); | |
884 | if (ret != SR_OK) { | |
885 | ret = SR_ERR_DATA; | |
886 | break; | |
887 | } | |
888 | response_array = g_array_append_val(response_array, tmp); | |
889 | ptr++; | |
890 | } | |
891 | g_strfreev(tokens); | |
892 | g_free(response); | |
893 | ||
894 | if (ret != SR_OK && response_array->len == 0) { | |
895 | g_array_free(response_array, TRUE); | |
896 | return SR_ERR_DATA; | |
897 | } | |
898 | ||
899 | *scpi_response = response_array; | |
900 | ||
901 | return ret; | |
902 | } | |
903 | ||
904 | /** | |
905 | * Send a SCPI command, read the reply, parse it as comma separated list of | |
906 | * unsigned 8 bit integers and store the as an result in scpi_response. | |
907 | * | |
908 | * Callers must free the allocated memory (unless it's NULL) regardless of | |
909 | * the routine's return code. See @ref g_array_free(). | |
910 | * | |
911 | * @param[in] scpi Previously initialised SCPI device structure. | |
912 | * @param[in] command The SCPI command to send to the device (can be NULL). | |
913 | * @param[out] scpi_response Pointer where to store the parsed result. | |
914 | * | |
915 | * @return SR_OK upon successfully parsing all values, SR_ERR* upon a parsing | |
916 | * error or upon no response. | |
917 | */ | |
918 | SR_PRIV int sr_scpi_get_uint8v(struct sr_scpi_dev_inst *scpi, | |
919 | const char *command, GArray **scpi_response) | |
920 | { | |
921 | int tmp, ret; | |
922 | char *response; | |
923 | gchar **ptr, **tokens; | |
924 | size_t token_count; | |
925 | GArray *response_array; | |
926 | ||
927 | *scpi_response = NULL; | |
928 | ||
929 | response = NULL; | |
930 | ret = sr_scpi_get_string(scpi, command, &response); | |
931 | if (ret != SR_OK && !response) | |
932 | return ret; | |
933 | ||
934 | tokens = g_strsplit(response, ",", 0); | |
935 | token_count = g_strv_length(tokens); | |
936 | ||
937 | response_array = g_array_sized_new(TRUE, FALSE, | |
938 | sizeof(uint8_t), token_count + 1); | |
939 | ||
940 | ptr = tokens; | |
941 | while (*ptr) { | |
942 | ret = sr_atoi(*ptr, &tmp); | |
943 | if (ret != SR_OK) { | |
944 | ret = SR_ERR_DATA; | |
945 | break; | |
946 | } | |
947 | response_array = g_array_append_val(response_array, tmp); | |
948 | ptr++; | |
949 | } | |
950 | g_strfreev(tokens); | |
951 | g_free(response); | |
952 | ||
953 | if (response_array->len == 0) { | |
954 | g_array_free(response_array, TRUE); | |
955 | return SR_ERR_DATA; | |
956 | } | |
957 | ||
958 | *scpi_response = response_array; | |
959 | ||
960 | return ret; | |
961 | } | |
962 | ||
963 | /** | |
964 | * Send a SCPI command, read the reply, parse it as binary data with a | |
965 | * "definite length block" header and store the as an result in scpi_response. | |
966 | * | |
967 | * Callers must free the allocated memory (unless it's NULL) regardless of | |
968 | * the routine's return code. See @ref g_byte_array_free(). | |
969 | * | |
970 | * @param[in] scpi Previously initialised SCPI device structure. | |
971 | * @param[in] command The SCPI command to send to the device (can be NULL). | |
972 | * @param[out] scpi_response Pointer where to store the parsed result. | |
973 | * | |
974 | * @return SR_OK upon successfully parsing all values, SR_ERR* upon a parsing | |
975 | * error or upon no response. | |
976 | */ | |
977 | SR_PRIV int sr_scpi_get_block(struct sr_scpi_dev_inst *scpi, | |
978 | const char *command, GByteArray **scpi_response) | |
979 | { | |
980 | int ret; | |
981 | GString* response; | |
982 | gsize oldlen; | |
983 | char buf[10]; | |
984 | long llen; | |
985 | long datalen; | |
986 | gint64 timeout; | |
987 | ||
988 | *scpi_response = NULL; | |
989 | ||
990 | g_mutex_lock(&scpi->scpi_mutex); | |
991 | ||
992 | if (command) | |
993 | if (scpi_send(scpi, command) != SR_OK) { | |
994 | g_mutex_unlock(&scpi->scpi_mutex); | |
995 | return SR_ERR; | |
996 | } | |
997 | ||
998 | if (sr_scpi_read_begin(scpi) != SR_OK) { | |
999 | g_mutex_unlock(&scpi->scpi_mutex); | |
1000 | return SR_ERR; | |
1001 | } | |
1002 | ||
1003 | /* | |
1004 | * Assume an initial maximum length, optionally gets adjusted below. | |
1005 | * Prepare a NULL return value for when error paths will be taken. | |
1006 | */ | |
1007 | response = g_string_sized_new(1024); | |
1008 | ||
1009 | timeout = g_get_monotonic_time() + scpi->read_timeout_us; | |
1010 | ||
1011 | /* Get (the first chunk of) the response. */ | |
1012 | do { | |
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 | } while (response->len < 2); | |
1020 | ||
1021 | /* | |
1022 | * SCPI protocol data blocks are preceeded with a length spec. | |
1023 | * The length spec consists of a '#' marker, one digit which | |
1024 | * specifies the character count of the length spec, and the | |
1025 | * respective number of characters which specify the data block's | |
1026 | * length. Raw data bytes follow (thus one must no longer assume | |
1027 | * that the received input stream would be an ASCIIZ string). | |
1028 | * | |
1029 | * Get the data block length, and strip off the length spec from | |
1030 | * the input buffer, leaving just the data bytes. | |
1031 | */ | |
1032 | if (response->str[0] != '#') { | |
1033 | g_mutex_unlock(&scpi->scpi_mutex); | |
1034 | g_string_free(response, TRUE); | |
1035 | return SR_ERR_DATA; | |
1036 | } | |
1037 | buf[0] = response->str[1]; | |
1038 | buf[1] = '\0'; | |
1039 | ret = sr_atol(buf, &llen); | |
1040 | if ((ret != SR_OK) || (llen == 0)) { | |
1041 | g_mutex_unlock(&scpi->scpi_mutex); | |
1042 | g_string_free(response, TRUE); | |
1043 | return ret; | |
1044 | } | |
1045 | ||
1046 | while (response->len < (unsigned long)(2 + llen)) { | |
1047 | ret = scpi_read_response(scpi, response, timeout); | |
1048 | if (ret < 0) { | |
1049 | g_mutex_unlock(&scpi->scpi_mutex); | |
1050 | g_string_free(response, TRUE); | |
1051 | return ret; | |
1052 | } | |
1053 | } | |
1054 | ||
1055 | memcpy(buf, &response->str[2], llen); | |
1056 | buf[llen] = '\0'; | |
1057 | ret = sr_atol(buf, &datalen); | |
1058 | if ((ret != SR_OK) || (datalen == 0)) { | |
1059 | g_mutex_unlock(&scpi->scpi_mutex); | |
1060 | g_string_free(response, TRUE); | |
1061 | return ret; | |
1062 | } | |
1063 | g_string_erase(response, 0, 2 + llen); | |
1064 | ||
1065 | /* | |
1066 | * Re-allocate the buffer size to the now known length | |
1067 | * and keep reading more chunks of response data. | |
1068 | */ | |
1069 | oldlen = response->len; | |
1070 | g_string_set_size(response, datalen); | |
1071 | g_string_set_size(response, oldlen); | |
1072 | ||
1073 | if (oldlen < (unsigned long)(datalen)) { | |
1074 | do { | |
1075 | oldlen = response->len; | |
1076 | ret = scpi_read_response(scpi, response, timeout); | |
1077 | ||
1078 | /* On timeout truncate the buffer and send the partial response | |
1079 | * instead of getting stuck on timeouts... | |
1080 | */ | |
1081 | if (ret == SR_ERR_TIMEOUT) { | |
1082 | datalen = oldlen; | |
1083 | break; | |
1084 | } | |
1085 | if (ret < 0) { | |
1086 | g_mutex_unlock(&scpi->scpi_mutex); | |
1087 | g_string_free(response, TRUE); | |
1088 | return ret; | |
1089 | } | |
1090 | if (ret > 0) | |
1091 | timeout = g_get_monotonic_time() + scpi->read_timeout_us; | |
1092 | } while (response->len < (unsigned long)(datalen)); | |
1093 | } | |
1094 | ||
1095 | g_mutex_unlock(&scpi->scpi_mutex); | |
1096 | ||
1097 | /* Convert received data to byte array. */ | |
1098 | *scpi_response = g_byte_array_new_take( | |
1099 | (guint8*)g_string_free(response, FALSE), datalen); | |
1100 | ||
1101 | return SR_OK; | |
1102 | } | |
1103 | ||
1104 | /** | |
1105 | * Send the *IDN? SCPI command, receive the reply, parse it and store the | |
1106 | * reply as a sr_scpi_hw_info structure in the supplied scpi_response pointer. | |
1107 | * | |
1108 | * Callers must free the allocated memory regardless of the routine's | |
1109 | * return code. See @ref sr_scpi_hw_info_free(). | |
1110 | * | |
1111 | * @param[in] scpi Previously initialised SCPI device structure. | |
1112 | * @param[out] scpi_response Pointer where to store the hw_info structure. | |
1113 | * | |
1114 | * @return SR_OK upon success, SR_ERR* on failure. | |
1115 | */ | |
1116 | SR_PRIV int sr_scpi_get_hw_id(struct sr_scpi_dev_inst *scpi, | |
1117 | struct sr_scpi_hw_info **scpi_response) | |
1118 | { | |
1119 | int num_tokens, ret; | |
1120 | char *response; | |
1121 | gchar **tokens; | |
1122 | struct sr_scpi_hw_info *hw_info; | |
1123 | gchar *idn_substr; | |
1124 | ||
1125 | *scpi_response = NULL; | |
1126 | response = NULL; | |
1127 | tokens = NULL; | |
1128 | ||
1129 | ret = sr_scpi_get_string(scpi, SCPI_CMD_IDN, &response); | |
1130 | if (ret != SR_OK && !response) | |
1131 | return ret; | |
1132 | ||
1133 | /* | |
1134 | * The response to a '*IDN?' is specified by the SCPI spec. It contains | |
1135 | * a comma-separated list containing the manufacturer name, instrument | |
1136 | * model, serial number of the instrument and the firmware version. | |
1137 | * | |
1138 | * BEWARE! Although strictly speaking a smaller field count is invalid, | |
1139 | * this implementation also accepts IDN responses with one field less, | |
1140 | * and assumes that the serial number is missing. Some GWInstek DMMs | |
1141 | * were found to do this. Keep warning about this condition, which may | |
1142 | * need more consideration later. | |
1143 | */ | |
1144 | tokens = g_strsplit(response, ",", 0); | |
1145 | num_tokens = g_strv_length(tokens); | |
1146 | if (num_tokens < 3) { | |
1147 | sr_dbg("IDN response not according to spec: '%s'", response); | |
1148 | g_strfreev(tokens); | |
1149 | g_free(response); | |
1150 | return SR_ERR_DATA; | |
1151 | } | |
1152 | if (num_tokens < 4) { | |
1153 | sr_warn("Short IDN response, assume missing serial number."); | |
1154 | } | |
1155 | g_free(response); | |
1156 | ||
1157 | hw_info = g_malloc0(sizeof(*hw_info)); | |
1158 | ||
1159 | idn_substr = g_strstr_len(tokens[0], -1, "IDN "); | |
1160 | if (idn_substr == NULL) | |
1161 | hw_info->manufacturer = g_strstrip(g_strdup(tokens[0])); | |
1162 | else | |
1163 | hw_info->manufacturer = g_strstrip(g_strdup(idn_substr + 4)); | |
1164 | ||
1165 | hw_info->model = g_strstrip(g_strdup(tokens[1])); | |
1166 | if (num_tokens < 4) { | |
1167 | hw_info->serial_number = g_strdup("Unknown"); | |
1168 | hw_info->firmware_version = g_strstrip(g_strdup(tokens[2])); | |
1169 | } else { | |
1170 | hw_info->serial_number = g_strstrip(g_strdup(tokens[2])); | |
1171 | hw_info->firmware_version = g_strstrip(g_strdup(tokens[3])); | |
1172 | } | |
1173 | ||
1174 | g_strfreev(tokens); | |
1175 | ||
1176 | *scpi_response = hw_info; | |
1177 | ||
1178 | return SR_OK; | |
1179 | } | |
1180 | ||
1181 | /** | |
1182 | * Free a sr_scpi_hw_info struct. | |
1183 | * | |
1184 | * @param hw_info Pointer to the struct to free. If NULL, this | |
1185 | * function does nothing. | |
1186 | */ | |
1187 | SR_PRIV void sr_scpi_hw_info_free(struct sr_scpi_hw_info *hw_info) | |
1188 | { | |
1189 | if (!hw_info) | |
1190 | return; | |
1191 | ||
1192 | g_free(hw_info->manufacturer); | |
1193 | g_free(hw_info->model); | |
1194 | g_free(hw_info->serial_number); | |
1195 | g_free(hw_info->firmware_version); | |
1196 | g_free(hw_info); | |
1197 | } | |
1198 | ||
1199 | /** | |
1200 | * Remove potentially enclosing pairs of quotes, un-escape content. | |
1201 | * This implementation modifies the caller's buffer when quotes are found | |
1202 | * and doubled quote characters need to get removed from the content. | |
1203 | * | |
1204 | * @param[in, out] s The SCPI string to check and un-quote. | |
1205 | * | |
1206 | * @return The start of the un-quoted string. | |
1207 | */ | |
1208 | SR_PRIV const char *sr_scpi_unquote_string(char *s) | |
1209 | { | |
1210 | size_t s_len; | |
1211 | char quotes[3]; | |
1212 | char *rdptr; | |
1213 | ||
1214 | /* Immediately bail out on invalid or short input. */ | |
1215 | if (!s || !*s) | |
1216 | return s; | |
1217 | s_len = strlen(s); | |
1218 | if (s_len < 2) | |
1219 | return s; | |
1220 | ||
1221 | /* Check for matching quote characters front and back. */ | |
1222 | if (s[0] != '\'' && s[0] != '"') | |
1223 | return s; | |
1224 | if (s[0] != s[s_len - 1]) | |
1225 | return s; | |
1226 | ||
1227 | /* Need to strip quotes, and un-double quote chars inside. */ | |
1228 | quotes[0] = quotes[1] = *s; | |
1229 | quotes[2] = '\0'; | |
1230 | s[s_len - 1] = '\0'; | |
1231 | s++; | |
1232 | rdptr = s; | |
1233 | while ((rdptr = strstr(rdptr, quotes)) != NULL) { | |
1234 | memmove(rdptr, rdptr + 1, strlen(rdptr)); | |
1235 | rdptr++; | |
1236 | } | |
1237 | ||
1238 | return s; | |
1239 | } | |
1240 | ||
1241 | SR_PRIV const char *sr_vendor_alias(const char *raw_vendor) | |
1242 | { | |
1243 | unsigned int i; | |
1244 | ||
1245 | for (i = 0; i < ARRAY_SIZE(scpi_vendors); i++) { | |
1246 | if (!g_ascii_strcasecmp(raw_vendor, scpi_vendors[i][0])) | |
1247 | return scpi_vendors[i][1]; | |
1248 | } | |
1249 | ||
1250 | return raw_vendor; | |
1251 | } | |
1252 | ||
1253 | SR_PRIV const char *sr_scpi_cmd_get(const struct scpi_command *cmdtable, | |
1254 | int command) | |
1255 | { | |
1256 | unsigned int i; | |
1257 | const char *cmd; | |
1258 | ||
1259 | if (!cmdtable) | |
1260 | return NULL; | |
1261 | ||
1262 | cmd = NULL; | |
1263 | for (i = 0; cmdtable[i].string; i++) { | |
1264 | if (cmdtable[i].command == command) { | |
1265 | cmd = cmdtable[i].string; | |
1266 | break; | |
1267 | } | |
1268 | } | |
1269 | ||
1270 | return cmd; | |
1271 | } | |
1272 | ||
1273 | SR_PRIV int sr_scpi_cmd(const struct sr_dev_inst *sdi, | |
1274 | const struct scpi_command *cmdtable, | |
1275 | int channel_command, const char *channel_name, | |
1276 | int command, ...) | |
1277 | { | |
1278 | struct sr_scpi_dev_inst *scpi; | |
1279 | va_list args; | |
1280 | int ret; | |
1281 | const char *channel_cmd; | |
1282 | const char *cmd; | |
1283 | ||
1284 | scpi = sdi->conn; | |
1285 | ||
1286 | if (!(cmd = sr_scpi_cmd_get(cmdtable, command))) { | |
1287 | /* Device does not implement this command, that's OK. */ | |
1288 | return SR_OK; | |
1289 | } | |
1290 | ||
1291 | g_mutex_lock(&scpi->scpi_mutex); | |
1292 | ||
1293 | /* Select channel. */ | |
1294 | channel_cmd = sr_scpi_cmd_get(cmdtable, channel_command); | |
1295 | if (channel_cmd && channel_name && | |
1296 | g_strcmp0(channel_name, scpi->actual_channel_name)) { | |
1297 | sr_spew("sr_scpi_cmd(): new channel = %s", channel_name); | |
1298 | g_free(scpi->actual_channel_name); | |
1299 | scpi->actual_channel_name = g_strdup(channel_name); | |
1300 | ret = scpi_send(scpi, channel_cmd, channel_name); | |
1301 | if (ret != SR_OK) | |
1302 | return ret; | |
1303 | } | |
1304 | ||
1305 | va_start(args, command); | |
1306 | ret = scpi_send_variadic(scpi, cmd, args); | |
1307 | va_end(args); | |
1308 | ||
1309 | g_mutex_unlock(&scpi->scpi_mutex); | |
1310 | ||
1311 | return ret; | |
1312 | } | |
1313 | ||
1314 | SR_PRIV int sr_scpi_cmd_resp(const struct sr_dev_inst *sdi, | |
1315 | const struct scpi_command *cmdtable, | |
1316 | int channel_command, const char *channel_name, | |
1317 | GVariant **gvar, const GVariantType *gvtype, int command, ...) | |
1318 | { | |
1319 | struct sr_scpi_dev_inst *scpi; | |
1320 | va_list args; | |
1321 | const char *channel_cmd; | |
1322 | const char *cmd; | |
1323 | GString *response; | |
1324 | char *s; | |
1325 | gboolean b; | |
1326 | double d; | |
1327 | int ret; | |
1328 | ||
1329 | scpi = sdi->conn; | |
1330 | ||
1331 | if (!(cmd = sr_scpi_cmd_get(cmdtable, command))) { | |
1332 | /* Device does not implement this command. */ | |
1333 | return SR_ERR_NA; | |
1334 | } | |
1335 | ||
1336 | g_mutex_lock(&scpi->scpi_mutex); | |
1337 | ||
1338 | /* Select channel. */ | |
1339 | channel_cmd = sr_scpi_cmd_get(cmdtable, channel_command); | |
1340 | if (channel_cmd && channel_name && | |
1341 | g_strcmp0(channel_name, scpi->actual_channel_name)) { | |
1342 | sr_spew("sr_scpi_cmd_get(): new channel = %s", channel_name); | |
1343 | g_free(scpi->actual_channel_name); | |
1344 | scpi->actual_channel_name = g_strdup(channel_name); | |
1345 | ret = scpi_send(scpi, channel_cmd, channel_name); | |
1346 | if (ret != SR_OK) | |
1347 | return ret; | |
1348 | } | |
1349 | ||
1350 | va_start(args, command); | |
1351 | ret = scpi_send_variadic(scpi, cmd, args); | |
1352 | va_end(args); | |
1353 | if (ret != SR_OK) { | |
1354 | g_mutex_unlock(&scpi->scpi_mutex); | |
1355 | return ret; | |
1356 | } | |
1357 | ||
1358 | response = g_string_sized_new(1024); | |
1359 | ret = scpi_get_data(scpi, NULL, &response); | |
1360 | if (ret != SR_OK) { | |
1361 | g_mutex_unlock(&scpi->scpi_mutex); | |
1362 | if (response) | |
1363 | g_string_free(response, TRUE); | |
1364 | return ret; | |
1365 | } | |
1366 | ||
1367 | g_mutex_unlock(&scpi->scpi_mutex); | |
1368 | ||
1369 | /* Get rid of trailing linefeed if present */ | |
1370 | if (response->len >= 1 && response->str[response->len - 1] == '\n') | |
1371 | g_string_truncate(response, response->len - 1); | |
1372 | ||
1373 | /* Get rid of trailing carriage return if present */ | |
1374 | if (response->len >= 1 && response->str[response->len - 1] == '\r') | |
1375 | g_string_truncate(response, response->len - 1); | |
1376 | ||
1377 | s = g_string_free(response, FALSE); | |
1378 | ||
1379 | ret = SR_OK; | |
1380 | if (g_variant_type_equal(gvtype, G_VARIANT_TYPE_BOOLEAN)) { | |
1381 | if ((ret = parse_strict_bool(s, &b)) == SR_OK) | |
1382 | *gvar = g_variant_new_boolean(b); | |
1383 | } else if (g_variant_type_equal(gvtype, G_VARIANT_TYPE_DOUBLE)) { | |
1384 | if ((ret = sr_atod_ascii(s, &d)) == SR_OK) | |
1385 | *gvar = g_variant_new_double(d); | |
1386 | } else if (g_variant_type_equal(gvtype, G_VARIANT_TYPE_STRING)) { | |
1387 | *gvar = g_variant_new_string(s); | |
1388 | } else { | |
1389 | sr_err("Unable to convert to desired GVariant type."); | |
1390 | ret = SR_ERR_NA; | |
1391 | } | |
1392 | ||
1393 | g_free(s); | |
1394 | ||
1395 | return ret; | |
1396 | } |