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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 = 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 | * Get the connection ID of the SCPI device. | |
412 | * | |
413 | * @param scpi Previously initialized SCPI device structure. | |
414 | * @param connection_id Pointer where to store the connection ID. The caller | |
415 | * is responsible for g_free()ing the string when it is no longer needed. | |
416 | * | |
417 | * @return SR_OK on success, SR_ERR on failure. | |
418 | */ | |
419 | SR_PRIV int sr_scpi_connection_id(struct sr_scpi_dev_inst *scpi, | |
420 | char **connection_id) | |
421 | { | |
422 | return scpi->connection_id(scpi, connection_id); | |
423 | } | |
424 | ||
425 | /** | |
426 | * Add an event source for an SCPI device. | |
427 | * | |
428 | * @param session The session to add the event source to. | |
429 | * @param scpi Previously initialized SCPI device structure. | |
430 | * @param events Events to check for. | |
431 | * @param timeout Max time to wait before the callback is called, ignored if 0. | |
432 | * @param cb Callback function to add. Must not be NULL. | |
433 | * @param cb_data Data for the callback function. Can be NULL. | |
434 | * | |
435 | * @return SR_OK upon success, SR_ERR_ARG upon invalid arguments, or | |
436 | * SR_ERR_MALLOC upon memory allocation errors. | |
437 | */ | |
438 | SR_PRIV int sr_scpi_source_add(struct sr_session *session, | |
439 | struct sr_scpi_dev_inst *scpi, int events, int timeout, | |
440 | sr_receive_data_callback cb, void *cb_data) | |
441 | { | |
442 | return scpi->source_add(session, scpi->priv, events, timeout, cb, cb_data); | |
443 | } | |
444 | ||
445 | /** | |
446 | * Remove event source for an SCPI device. | |
447 | * | |
448 | * @param session The session to remove the event source from. | |
449 | * @param scpi Previously initialized SCPI device structure. | |
450 | * | |
451 | * @return SR_OK upon success, SR_ERR_ARG upon invalid arguments, or | |
452 | * SR_ERR_MALLOC upon memory allocation errors, SR_ERR_BUG upon | |
453 | * internal errors. | |
454 | */ | |
455 | SR_PRIV int sr_scpi_source_remove(struct sr_session *session, | |
456 | struct sr_scpi_dev_inst *scpi) | |
457 | { | |
458 | return scpi->source_remove(session, scpi->priv); | |
459 | } | |
460 | ||
461 | /** | |
462 | * Send a SCPI command. | |
463 | * | |
464 | * @param scpi Previously initialized SCPI device structure. | |
465 | * @param format Format string, to be followed by any necessary arguments. | |
466 | * | |
467 | * @return SR_OK on success, SR_ERR on failure. | |
468 | */ | |
469 | SR_PRIV int sr_scpi_send(struct sr_scpi_dev_inst *scpi, | |
470 | const char *format, ...) | |
471 | { | |
472 | va_list args; | |
473 | int ret; | |
474 | ||
475 | va_start(args, format); | |
476 | g_mutex_lock(&scpi->scpi_mutex); | |
477 | ret = scpi_send_variadic(scpi, format, args); | |
478 | g_mutex_unlock(&scpi->scpi_mutex); | |
479 | va_end(args); | |
480 | ||
481 | return ret; | |
482 | } | |
483 | ||
484 | /** | |
485 | * Send a SCPI command with a variadic argument list. | |
486 | * | |
487 | * @param scpi Previously initialized SCPI device structure. | |
488 | * @param format Format string. | |
489 | * @param args Argument list. | |
490 | * | |
491 | * @return SR_OK on success, SR_ERR on failure. | |
492 | */ | |
493 | SR_PRIV int sr_scpi_send_variadic(struct sr_scpi_dev_inst *scpi, | |
494 | const char *format, va_list args) | |
495 | { | |
496 | int ret; | |
497 | ||
498 | g_mutex_lock(&scpi->scpi_mutex); | |
499 | ret = scpi_send_variadic(scpi, format, args); | |
500 | g_mutex_unlock(&scpi->scpi_mutex); | |
501 | ||
502 | return ret; | |
503 | } | |
504 | ||
505 | /** | |
506 | * Begin receiving an SCPI reply. | |
507 | * | |
508 | * @param scpi Previously initialised SCPI device structure. | |
509 | * | |
510 | * @return SR_OK on success, SR_ERR on failure. | |
511 | */ | |
512 | SR_PRIV int sr_scpi_read_begin(struct sr_scpi_dev_inst *scpi) | |
513 | { | |
514 | return scpi->read_begin(scpi->priv); | |
515 | } | |
516 | ||
517 | /** | |
518 | * Read part of a response from SCPI device. | |
519 | * | |
520 | * @param scpi Previously initialised SCPI device structure. | |
521 | * @param buf Buffer to store result. | |
522 | * @param maxlen Maximum number of bytes to read. | |
523 | * | |
524 | * @return Number of bytes read, or SR_ERR upon failure. | |
525 | */ | |
526 | SR_PRIV int sr_scpi_read_data(struct sr_scpi_dev_inst *scpi, | |
527 | char *buf, int maxlen) | |
528 | { | |
529 | int ret; | |
530 | ||
531 | g_mutex_lock(&scpi->scpi_mutex); | |
532 | ret = scpi_read_data(scpi, buf, maxlen); | |
533 | g_mutex_unlock(&scpi->scpi_mutex); | |
534 | ||
535 | return ret; | |
536 | } | |
537 | ||
538 | /** | |
539 | * Send data to SCPI device. | |
540 | * | |
541 | * TODO: This is only implemented in TcpRaw, but never used. | |
542 | * TODO: Use Mutex at all? | |
543 | * | |
544 | * @param scpi Previously initialised SCPI device structure. | |
545 | * @param buf Buffer with data to send. | |
546 | * @param len Number of bytes to send. | |
547 | * | |
548 | * @return Number of bytes read, or SR_ERR upon failure. | |
549 | */ | |
550 | SR_PRIV int sr_scpi_write_data(struct sr_scpi_dev_inst *scpi, | |
551 | char *buf, int maxlen) | |
552 | { | |
553 | int ret; | |
554 | ||
555 | g_mutex_lock(&scpi->scpi_mutex); | |
556 | ret = scpi_write_data(scpi, buf, maxlen); | |
557 | g_mutex_unlock(&scpi->scpi_mutex); | |
558 | ||
559 | return ret; | |
560 | } | |
561 | ||
562 | /** | |
563 | * Check whether a complete SCPI response has been received. | |
564 | * | |
565 | * @param scpi Previously initialised SCPI device structure. | |
566 | * | |
567 | * @return 1 if complete, 0 otherwise. | |
568 | */ | |
569 | SR_PRIV int sr_scpi_read_complete(struct sr_scpi_dev_inst *scpi) | |
570 | { | |
571 | return scpi->read_complete(scpi->priv); | |
572 | } | |
573 | ||
574 | /** | |
575 | * Close SCPI device. | |
576 | * | |
577 | * @param scpi Previously initialized SCPI device structure. | |
578 | * | |
579 | * @return SR_OK on success, SR_ERR on failure. | |
580 | */ | |
581 | SR_PRIV int sr_scpi_close(struct sr_scpi_dev_inst *scpi) | |
582 | { | |
583 | int ret; | |
584 | ||
585 | g_mutex_lock(&scpi->scpi_mutex); | |
586 | ret = scpi->close(scpi); | |
587 | g_mutex_unlock(&scpi->scpi_mutex); | |
588 | g_mutex_clear(&scpi->scpi_mutex); | |
589 | ||
590 | return ret; | |
591 | } | |
592 | ||
593 | /** | |
594 | * Free SCPI device. | |
595 | * | |
596 | * @param scpi Previously initialized SCPI device structure. If NULL, | |
597 | * this function does nothing. | |
598 | */ | |
599 | SR_PRIV void sr_scpi_free(struct sr_scpi_dev_inst *scpi) | |
600 | { | |
601 | if (!scpi) | |
602 | return; | |
603 | ||
604 | scpi->free(scpi->priv); | |
605 | g_free(scpi->priv); | |
606 | g_free(scpi->actual_channel_name); | |
607 | g_free(scpi); | |
608 | } | |
609 | ||
610 | /** | |
611 | * Send a SCPI command, receive the reply and store the reply in scpi_response. | |
612 | * | |
613 | * @param scpi Previously initialised SCPI device structure. | |
614 | * @param command The SCPI command to send to the device (can be NULL). | |
615 | * @param scpi_response Pointer where to store the SCPI response. | |
616 | * | |
617 | * @return SR_OK on success, SR_ERR* on failure. | |
618 | */ | |
619 | SR_PRIV int sr_scpi_get_string(struct sr_scpi_dev_inst *scpi, | |
620 | const char *command, char **scpi_response) | |
621 | { | |
622 | GString *response; | |
623 | ||
624 | *scpi_response = NULL; | |
625 | ||
626 | response = g_string_sized_new(1024); | |
627 | if (sr_scpi_get_data(scpi, command, &response) != SR_OK) { | |
628 | if (response) | |
629 | g_string_free(response, TRUE); | |
630 | return SR_ERR; | |
631 | } | |
632 | ||
633 | /* Get rid of trailing linefeed if present */ | |
634 | if (response->len >= 1 && response->str[response->len - 1] == '\n') | |
635 | g_string_truncate(response, response->len - 1); | |
636 | ||
637 | /* Get rid of trailing carriage return if present */ | |
638 | if (response->len >= 1 && response->str[response->len - 1] == '\r') | |
639 | g_string_truncate(response, response->len - 1); | |
640 | ||
641 | sr_spew("Got response: '%.70s', length %" G_GSIZE_FORMAT ".", | |
642 | response->str, response->len); | |
643 | ||
644 | *scpi_response = g_string_free(response, FALSE); | |
645 | ||
646 | return SR_OK; | |
647 | } | |
648 | ||
649 | /** | |
650 | * Do a non-blocking read of up to the allocated length, and | |
651 | * check if a timeout has occured. | |
652 | * | |
653 | * @param scpi Previously initialised SCPI device structure. | |
654 | * @param response Buffer to which the response is appended. | |
655 | * @param abs_timeout_us Absolute timeout in microseconds | |
656 | * | |
657 | * @return read length on success, SR_ERR* on failure. | |
658 | */ | |
659 | SR_PRIV int sr_scpi_read_response(struct sr_scpi_dev_inst *scpi, | |
660 | GString *response, gint64 abs_timeout_us) | |
661 | { | |
662 | int ret; | |
663 | ||
664 | g_mutex_lock(&scpi->scpi_mutex); | |
665 | ret = scpi_read_response(scpi, response, abs_timeout_us); | |
666 | g_mutex_unlock(&scpi->scpi_mutex); | |
667 | ||
668 | return ret; | |
669 | } | |
670 | ||
671 | SR_PRIV int sr_scpi_get_data(struct sr_scpi_dev_inst *scpi, | |
672 | const char *command, GString **scpi_response) | |
673 | { | |
674 | int ret; | |
675 | ||
676 | g_mutex_lock(&scpi->scpi_mutex); | |
677 | ret = scpi_get_data(scpi, command, scpi_response); | |
678 | g_mutex_unlock(&scpi->scpi_mutex); | |
679 | ||
680 | return ret; | |
681 | } | |
682 | ||
683 | /** | |
684 | * Send a SCPI command, read the reply, parse it as a bool value and store the | |
685 | * result in scpi_response. | |
686 | * | |
687 | * @param scpi Previously initialised SCPI device structure. | |
688 | * @param command The SCPI command to send to the device (can be NULL). | |
689 | * @param scpi_response Pointer where to store the parsed result. | |
690 | * | |
691 | * @return SR_OK on success, SR_ERR* on failure. | |
692 | */ | |
693 | SR_PRIV int sr_scpi_get_bool(struct sr_scpi_dev_inst *scpi, | |
694 | const char *command, gboolean *scpi_response) | |
695 | { | |
696 | int ret; | |
697 | char *response; | |
698 | ||
699 | response = NULL; | |
700 | ||
701 | ret = sr_scpi_get_string(scpi, command, &response); | |
702 | if (ret != SR_OK && !response) | |
703 | return ret; | |
704 | ||
705 | if (parse_strict_bool(response, scpi_response) == SR_OK) | |
706 | ret = SR_OK; | |
707 | else | |
708 | ret = SR_ERR_DATA; | |
709 | ||
710 | g_free(response); | |
711 | ||
712 | return ret; | |
713 | } | |
714 | ||
715 | /** | |
716 | * Send a SCPI command, read the reply, parse it as an integer and store the | |
717 | * result in scpi_response. | |
718 | * | |
719 | * @param scpi Previously initialised SCPI device structure. | |
720 | * @param command The SCPI command to send to the device (can be NULL). | |
721 | * @param scpi_response Pointer where to store the parsed result. | |
722 | * | |
723 | * @return SR_OK on success, SR_ERR* on failure. | |
724 | */ | |
725 | SR_PRIV int sr_scpi_get_int(struct sr_scpi_dev_inst *scpi, | |
726 | const char *command, int *scpi_response) | |
727 | { | |
728 | int ret; | |
729 | struct sr_rational ret_rational; | |
730 | char *response; | |
731 | ||
732 | response = NULL; | |
733 | ||
734 | ret = sr_scpi_get_string(scpi, command, &response); | |
735 | if (ret != SR_OK && !response) | |
736 | return ret; | |
737 | ||
738 | ret = sr_parse_rational(response, &ret_rational); | |
739 | if (ret == SR_OK && (ret_rational.p % ret_rational.q) == 0) { | |
740 | *scpi_response = ret_rational.p / ret_rational.q; | |
741 | } else { | |
742 | sr_dbg("get_int: non-integer rational=%" PRId64 "/%" PRIu64, | |
743 | ret_rational.p, ret_rational.q); | |
744 | ret = SR_ERR_DATA; | |
745 | } | |
746 | ||
747 | g_free(response); | |
748 | ||
749 | return ret; | |
750 | } | |
751 | ||
752 | /** | |
753 | * Send a SCPI command, read the reply, parse it as a float and store the | |
754 | * result in scpi_response. | |
755 | * | |
756 | * @param scpi Previously initialised SCPI device structure. | |
757 | * @param command The SCPI command to send to the device (can be NULL). | |
758 | * @param scpi_response Pointer where to store the parsed result. | |
759 | * | |
760 | * @return SR_OK on success, SR_ERR* on failure. | |
761 | */ | |
762 | SR_PRIV int sr_scpi_get_float(struct sr_scpi_dev_inst *scpi, | |
763 | const char *command, float *scpi_response) | |
764 | { | |
765 | int ret; | |
766 | char *response; | |
767 | ||
768 | response = NULL; | |
769 | ||
770 | ret = sr_scpi_get_string(scpi, command, &response); | |
771 | if (ret != SR_OK && !response) | |
772 | return ret; | |
773 | ||
774 | if (sr_atof_ascii(response, scpi_response) == SR_OK) | |
775 | ret = SR_OK; | |
776 | else | |
777 | ret = SR_ERR_DATA; | |
778 | ||
779 | g_free(response); | |
780 | ||
781 | return ret; | |
782 | } | |
783 | ||
784 | /** | |
785 | * Send a SCPI command, read the reply, parse it as a double and store the | |
786 | * result in scpi_response. | |
787 | * | |
788 | * @param scpi Previously initialised SCPI device structure. | |
789 | * @param command The SCPI command to send to the device (can be NULL). | |
790 | * @param scpi_response Pointer where to store the parsed result. | |
791 | * | |
792 | * @return SR_OK on success, SR_ERR* on failure. | |
793 | */ | |
794 | SR_PRIV int sr_scpi_get_double(struct sr_scpi_dev_inst *scpi, | |
795 | const char *command, double *scpi_response) | |
796 | { | |
797 | int ret; | |
798 | char *response; | |
799 | ||
800 | response = NULL; | |
801 | ||
802 | ret = sr_scpi_get_string(scpi, command, &response); | |
803 | if (ret != SR_OK && !response) | |
804 | return ret; | |
805 | ||
806 | if (sr_atod_ascii(response, scpi_response) == SR_OK) | |
807 | ret = SR_OK; | |
808 | else | |
809 | ret = SR_ERR_DATA; | |
810 | ||
811 | g_free(response); | |
812 | ||
813 | return ret; | |
814 | } | |
815 | ||
816 | /** | |
817 | * Send a SCPI *OPC? command, read the reply and return the result of the | |
818 | * command. | |
819 | * | |
820 | * @param scpi Previously initialised SCPI device structure. | |
821 | * | |
822 | * @return SR_OK on success, SR_ERR* on failure. | |
823 | */ | |
824 | SR_PRIV int sr_scpi_get_opc(struct sr_scpi_dev_inst *scpi) | |
825 | { | |
826 | unsigned int i; | |
827 | gboolean opc; | |
828 | ||
829 | for (i = 0; i < SCPI_READ_RETRIES; i++) { | |
830 | opc = FALSE; | |
831 | sr_scpi_get_bool(scpi, SCPI_CMD_OPC, &opc); | |
832 | if (opc) | |
833 | return SR_OK; | |
834 | g_usleep(SCPI_READ_RETRY_TIMEOUT_US); | |
835 | } | |
836 | ||
837 | return SR_ERR; | |
838 | } | |
839 | ||
840 | /** | |
841 | * Send a SCPI command, read the reply, parse it as comma separated list of | |
842 | * floats and store the as an result in scpi_response. | |
843 | * | |
844 | * @param scpi Previously initialised SCPI device structure. | |
845 | * @param command The SCPI command to send to the device (can be NULL). | |
846 | * @param scpi_response Pointer where to store the parsed result. | |
847 | * | |
848 | * @return SR_OK upon successfully parsing all values, SR_ERR* upon a parsing | |
849 | * error or upon no response. The allocated response must be freed by | |
850 | * the caller in the case of an SR_OK as well as in the case of | |
851 | * parsing error. | |
852 | */ | |
853 | SR_PRIV int sr_scpi_get_floatv(struct sr_scpi_dev_inst *scpi, | |
854 | const char *command, GArray **scpi_response) | |
855 | { | |
856 | int ret; | |
857 | float tmp; | |
858 | char *response; | |
859 | gchar **ptr, **tokens; | |
860 | GArray *response_array; | |
861 | ||
862 | *scpi_response = NULL; | |
863 | response = NULL; | |
864 | tokens = NULL; | |
865 | ||
866 | ret = sr_scpi_get_string(scpi, command, &response); | |
867 | if (ret != SR_OK && !response) | |
868 | return ret; | |
869 | ||
870 | tokens = g_strsplit(response, ",", 0); | |
871 | ptr = tokens; | |
872 | ||
873 | response_array = g_array_sized_new(TRUE, FALSE, sizeof(float), 256); | |
874 | ||
875 | while (*ptr) { | |
876 | if (sr_atof_ascii(*ptr, &tmp) == SR_OK) | |
877 | response_array = g_array_append_val(response_array, | |
878 | tmp); | |
879 | else | |
880 | ret = SR_ERR_DATA; | |
881 | ||
882 | ptr++; | |
883 | } | |
884 | g_strfreev(tokens); | |
885 | g_free(response); | |
886 | ||
887 | if (ret != SR_OK && response_array->len == 0) { | |
888 | g_array_free(response_array, TRUE); | |
889 | return SR_ERR_DATA; | |
890 | } | |
891 | ||
892 | *scpi_response = response_array; | |
893 | ||
894 | return ret; | |
895 | } | |
896 | ||
897 | /** | |
898 | * Send a SCPI command, read the reply, parse it as comma separated list of | |
899 | * unsigned 8 bit integers and store the as an result in scpi_response. | |
900 | * | |
901 | * @param scpi Previously initialised SCPI device structure. | |
902 | * @param command The SCPI command to send to the device (can be NULL). | |
903 | * @param scpi_response Pointer where to store the parsed result. | |
904 | * | |
905 | * @return SR_OK upon successfully parsing all values, SR_ERR* upon a parsing | |
906 | * error or upon no response. The allocated response must be freed by | |
907 | * the caller in the case of an SR_OK as well as in the case of | |
908 | * parsing error. | |
909 | */ | |
910 | SR_PRIV int sr_scpi_get_uint8v(struct sr_scpi_dev_inst *scpi, | |
911 | const char *command, GArray **scpi_response) | |
912 | { | |
913 | int tmp, ret; | |
914 | char *response; | |
915 | gchar **ptr, **tokens; | |
916 | GArray *response_array; | |
917 | ||
918 | *scpi_response = NULL; | |
919 | response = NULL; | |
920 | tokens = NULL; | |
921 | ||
922 | ret = sr_scpi_get_string(scpi, command, &response); | |
923 | if (ret != SR_OK && !response) | |
924 | return ret; | |
925 | ||
926 | tokens = g_strsplit(response, ",", 0); | |
927 | ptr = tokens; | |
928 | ||
929 | response_array = g_array_sized_new(TRUE, FALSE, sizeof(uint8_t), 256); | |
930 | ||
931 | while (*ptr) { | |
932 | if (sr_atoi(*ptr, &tmp) == SR_OK) | |
933 | response_array = g_array_append_val(response_array, | |
934 | tmp); | |
935 | else | |
936 | ret = SR_ERR_DATA; | |
937 | ||
938 | ptr++; | |
939 | } | |
940 | g_strfreev(tokens); | |
941 | g_free(response); | |
942 | ||
943 | if (response_array->len == 0) { | |
944 | g_array_free(response_array, TRUE); | |
945 | return SR_ERR_DATA; | |
946 | } | |
947 | ||
948 | *scpi_response = response_array; | |
949 | ||
950 | return ret; | |
951 | } | |
952 | ||
953 | /** | |
954 | * Send a SCPI command, read the reply, parse it as binary data with a | |
955 | * "definite length block" header and store the as an result in scpi_response. | |
956 | * | |
957 | * @param scpi Previously initialised SCPI device structure. | |
958 | * @param command The SCPI command to send to the device (can be NULL). | |
959 | * @param scpi_response Pointer where to store the parsed result. | |
960 | * | |
961 | * @return SR_OK upon successfully parsing all values, SR_ERR* upon a parsing | |
962 | * error or upon no response. The allocated response must be freed by | |
963 | * the caller in the case of an SR_OK as well as in the case of | |
964 | * parsing error. | |
965 | */ | |
966 | SR_PRIV int sr_scpi_get_block(struct sr_scpi_dev_inst *scpi, | |
967 | const char *command, GByteArray **scpi_response) | |
968 | { | |
969 | int ret; | |
970 | GString* response; | |
971 | gsize oldlen; | |
972 | char buf[10]; | |
973 | long llen; | |
974 | long datalen; | |
975 | gint64 timeout; | |
976 | ||
977 | *scpi_response = NULL; | |
978 | ||
979 | g_mutex_lock(&scpi->scpi_mutex); | |
980 | ||
981 | if (command) | |
982 | if (scpi_send(scpi, command) != SR_OK) { | |
983 | g_mutex_unlock(&scpi->scpi_mutex); | |
984 | return SR_ERR; | |
985 | } | |
986 | ||
987 | if (sr_scpi_read_begin(scpi) != SR_OK) { | |
988 | g_mutex_unlock(&scpi->scpi_mutex); | |
989 | return SR_ERR; | |
990 | } | |
991 | ||
992 | /* | |
993 | * Assume an initial maximum length, optionally gets adjusted below. | |
994 | * Prepare a NULL return value for when error paths will be taken. | |
995 | */ | |
996 | response = g_string_sized_new(1024); | |
997 | ||
998 | timeout = g_get_monotonic_time() + scpi->read_timeout_us; | |
999 | ||
1000 | /* Get (the first chunk of) the response. */ | |
1001 | do { | |
1002 | ret = scpi_read_response(scpi, response, timeout); | |
1003 | if (ret < 0) { | |
1004 | g_mutex_unlock(&scpi->scpi_mutex); | |
1005 | g_string_free(response, TRUE); | |
1006 | return ret; | |
1007 | } | |
1008 | } while (response->len < 2); | |
1009 | ||
1010 | /* | |
1011 | * SCPI protocol data blocks are preceeded with a length spec. | |
1012 | * The length spec consists of a '#' marker, one digit which | |
1013 | * specifies the character count of the length spec, and the | |
1014 | * respective number of characters which specify the data block's | |
1015 | * length. Raw data bytes follow (thus one must no longer assume | |
1016 | * that the received input stream would be an ASCIIZ string). | |
1017 | * | |
1018 | * Get the data block length, and strip off the length spec from | |
1019 | * the input buffer, leaving just the data bytes. | |
1020 | */ | |
1021 | if (response->str[0] != '#') { | |
1022 | g_mutex_unlock(&scpi->scpi_mutex); | |
1023 | g_string_free(response, TRUE); | |
1024 | return SR_ERR_DATA; | |
1025 | } | |
1026 | buf[0] = response->str[1]; | |
1027 | buf[1] = '\0'; | |
1028 | ret = sr_atol(buf, &llen); | |
1029 | if ((ret != SR_OK) || (llen == 0)) { | |
1030 | g_mutex_unlock(&scpi->scpi_mutex); | |
1031 | g_string_free(response, TRUE); | |
1032 | return ret; | |
1033 | } | |
1034 | ||
1035 | while (response->len < (unsigned long)(2 + llen)) { | |
1036 | ret = scpi_read_response(scpi, response, timeout); | |
1037 | if (ret < 0) { | |
1038 | g_mutex_unlock(&scpi->scpi_mutex); | |
1039 | g_string_free(response, TRUE); | |
1040 | return ret; | |
1041 | } | |
1042 | } | |
1043 | ||
1044 | memcpy(buf, &response->str[2], llen); | |
1045 | buf[llen] = '\0'; | |
1046 | ret = sr_atol(buf, &datalen); | |
1047 | if ((ret != SR_OK) || (datalen == 0)) { | |
1048 | g_mutex_unlock(&scpi->scpi_mutex); | |
1049 | g_string_free(response, TRUE); | |
1050 | return ret; | |
1051 | } | |
1052 | g_string_erase(response, 0, 2 + llen); | |
1053 | ||
1054 | /* | |
1055 | * Re-allocate the buffer size to the now known length | |
1056 | * and keep reading more chunks of response data. | |
1057 | */ | |
1058 | oldlen = response->len; | |
1059 | g_string_set_size(response, datalen); | |
1060 | g_string_set_size(response, oldlen); | |
1061 | ||
1062 | if (oldlen < (unsigned long)(datalen)) { | |
1063 | do { | |
1064 | oldlen = response->len; | |
1065 | ret = scpi_read_response(scpi, response, timeout); | |
1066 | ||
1067 | /* On timeout truncate the buffer and send the partial response | |
1068 | * instead of getting stuck on timeouts... | |
1069 | */ | |
1070 | if (ret == SR_ERR_TIMEOUT) { | |
1071 | datalen = oldlen; | |
1072 | break; | |
1073 | } | |
1074 | if (ret < 0) { | |
1075 | g_mutex_unlock(&scpi->scpi_mutex); | |
1076 | g_string_free(response, TRUE); | |
1077 | return ret; | |
1078 | } | |
1079 | if (ret > 0) | |
1080 | timeout = g_get_monotonic_time() + scpi->read_timeout_us; | |
1081 | } while (response->len < (unsigned long)(datalen)); | |
1082 | } | |
1083 | ||
1084 | g_mutex_unlock(&scpi->scpi_mutex); | |
1085 | ||
1086 | /* Convert received data to byte array. */ | |
1087 | *scpi_response = g_byte_array_new_take( | |
1088 | (guint8*)g_string_free(response, FALSE), datalen); | |
1089 | ||
1090 | return SR_OK; | |
1091 | } | |
1092 | ||
1093 | /** | |
1094 | * Send the *IDN? SCPI command, receive the reply, parse it and store the | |
1095 | * reply as a sr_scpi_hw_info structure in the supplied scpi_response pointer. | |
1096 | * | |
1097 | * The hw_info structure must be freed by the caller via sr_scpi_hw_info_free(). | |
1098 | * | |
1099 | * @param scpi Previously initialised SCPI device structure. | |
1100 | * @param scpi_response Pointer where to store the hw_info structure. | |
1101 | * | |
1102 | * @return SR_OK upon success, SR_ERR* on failure. | |
1103 | */ | |
1104 | SR_PRIV int sr_scpi_get_hw_id(struct sr_scpi_dev_inst *scpi, | |
1105 | struct sr_scpi_hw_info **scpi_response) | |
1106 | { | |
1107 | int num_tokens, ret; | |
1108 | char *response; | |
1109 | gchar **tokens; | |
1110 | struct sr_scpi_hw_info *hw_info; | |
1111 | gchar *idn_substr; | |
1112 | ||
1113 | *scpi_response = NULL; | |
1114 | response = NULL; | |
1115 | tokens = NULL; | |
1116 | ||
1117 | ret = sr_scpi_get_string(scpi, SCPI_CMD_IDN, &response); | |
1118 | if (ret != SR_OK && !response) | |
1119 | return ret; | |
1120 | ||
1121 | /* | |
1122 | * The response to a '*IDN?' is specified by the SCPI spec. It contains | |
1123 | * a comma-separated list containing the manufacturer name, instrument | |
1124 | * model, serial number of the instrument and the firmware version. | |
1125 | * | |
1126 | * BEWARE! Although strictly speaking a smaller field count is invalid, | |
1127 | * this implementation also accepts IDN responses with one field less, | |
1128 | * and assumes that the serial number is missing. Some GWInstek DMMs | |
1129 | * were found to do this. Keep warning about this condition, which may | |
1130 | * need more consideration later. | |
1131 | */ | |
1132 | tokens = g_strsplit(response, ",", 0); | |
1133 | num_tokens = g_strv_length(tokens); | |
1134 | if (num_tokens < 3) { | |
1135 | sr_dbg("IDN response not according to spec: '%s'", response); | |
1136 | g_strfreev(tokens); | |
1137 | g_free(response); | |
1138 | return SR_ERR_DATA; | |
1139 | } | |
1140 | if (num_tokens < 4) { | |
1141 | sr_warn("Short IDN response, assume missing serial number."); | |
1142 | } | |
1143 | g_free(response); | |
1144 | ||
1145 | hw_info = g_malloc0(sizeof(struct sr_scpi_hw_info)); | |
1146 | ||
1147 | idn_substr = g_strstr_len(tokens[0], -1, "IDN "); | |
1148 | if (idn_substr == NULL) | |
1149 | hw_info->manufacturer = g_strstrip(g_strdup(tokens[0])); | |
1150 | else | |
1151 | hw_info->manufacturer = g_strstrip(g_strdup(idn_substr + 4)); | |
1152 | ||
1153 | hw_info->model = g_strstrip(g_strdup(tokens[1])); | |
1154 | if (num_tokens < 4) { | |
1155 | hw_info->serial_number = g_strdup("Unknown"); | |
1156 | hw_info->firmware_version = g_strstrip(g_strdup(tokens[2])); | |
1157 | } else { | |
1158 | hw_info->serial_number = g_strstrip(g_strdup(tokens[2])); | |
1159 | hw_info->firmware_version = g_strstrip(g_strdup(tokens[3])); | |
1160 | } | |
1161 | ||
1162 | g_strfreev(tokens); | |
1163 | ||
1164 | *scpi_response = hw_info; | |
1165 | ||
1166 | return SR_OK; | |
1167 | } | |
1168 | ||
1169 | /** | |
1170 | * Free a sr_scpi_hw_info struct. | |
1171 | * | |
1172 | * @param hw_info Pointer to the struct to free. If NULL, this | |
1173 | * function does nothing. | |
1174 | */ | |
1175 | SR_PRIV void sr_scpi_hw_info_free(struct sr_scpi_hw_info *hw_info) | |
1176 | { | |
1177 | if (!hw_info) | |
1178 | return; | |
1179 | ||
1180 | g_free(hw_info->manufacturer); | |
1181 | g_free(hw_info->model); | |
1182 | g_free(hw_info->serial_number); | |
1183 | g_free(hw_info->firmware_version); | |
1184 | g_free(hw_info); | |
1185 | } | |
1186 | ||
1187 | /** | |
1188 | * Remove potentially enclosing pairs of quotes, un-escape content. | |
1189 | * This implementation modifies the caller's buffer when quotes are found | |
1190 | * and doubled quote characters need to get removed from the content. | |
1191 | * | |
1192 | * @param[in, out] s The SCPI string to check and un-quote. | |
1193 | * | |
1194 | * @return The start of the un-quoted string. | |
1195 | */ | |
1196 | SR_PRIV const char *sr_scpi_unquote_string(char *s) | |
1197 | { | |
1198 | size_t s_len; | |
1199 | char quotes[3]; | |
1200 | char *rdptr; | |
1201 | ||
1202 | /* Immediately bail out on invalid or short input. */ | |
1203 | if (!s || !*s) | |
1204 | return s; | |
1205 | s_len = strlen(s); | |
1206 | if (s_len < 2) | |
1207 | return s; | |
1208 | ||
1209 | /* Check for matching quote characters front and back. */ | |
1210 | if (s[0] != '\'' && s[0] != '"') | |
1211 | return s; | |
1212 | if (s[0] != s[s_len - 1]) | |
1213 | return s; | |
1214 | ||
1215 | /* Need to strip quotes, and un-double quote chars inside. */ | |
1216 | quotes[0] = quotes[1] = *s; | |
1217 | quotes[2] = '\0'; | |
1218 | s[s_len - 1] = '\0'; | |
1219 | s++; | |
1220 | rdptr = s; | |
1221 | while ((rdptr = strstr(rdptr, quotes)) != NULL) { | |
1222 | memmove(rdptr, rdptr + 1, strlen(rdptr)); | |
1223 | rdptr++; | |
1224 | } | |
1225 | ||
1226 | return s; | |
1227 | } | |
1228 | ||
1229 | SR_PRIV const char *sr_vendor_alias(const char *raw_vendor) | |
1230 | { | |
1231 | unsigned int i; | |
1232 | ||
1233 | for (i = 0; i < ARRAY_SIZE(scpi_vendors); i++) { | |
1234 | if (!g_ascii_strcasecmp(raw_vendor, scpi_vendors[i][0])) | |
1235 | return scpi_vendors[i][1]; | |
1236 | } | |
1237 | ||
1238 | return raw_vendor; | |
1239 | } | |
1240 | ||
1241 | SR_PRIV const char *sr_scpi_cmd_get(const struct scpi_command *cmdtable, | |
1242 | int command) | |
1243 | { | |
1244 | unsigned int i; | |
1245 | const char *cmd; | |
1246 | ||
1247 | if (!cmdtable) | |
1248 | return NULL; | |
1249 | ||
1250 | cmd = NULL; | |
1251 | for (i = 0; cmdtable[i].string; i++) { | |
1252 | if (cmdtable[i].command == command) { | |
1253 | cmd = cmdtable[i].string; | |
1254 | break; | |
1255 | } | |
1256 | } | |
1257 | ||
1258 | return cmd; | |
1259 | } | |
1260 | ||
1261 | SR_PRIV int sr_scpi_cmd(const struct sr_dev_inst *sdi, | |
1262 | const struct scpi_command *cmdtable, | |
1263 | int channel_command, const char *channel_name, | |
1264 | int command, ...) | |
1265 | { | |
1266 | struct sr_scpi_dev_inst *scpi; | |
1267 | va_list args; | |
1268 | int ret; | |
1269 | const char *channel_cmd; | |
1270 | const char *cmd; | |
1271 | ||
1272 | scpi = sdi->conn; | |
1273 | ||
1274 | if (!(cmd = sr_scpi_cmd_get(cmdtable, command))) { | |
1275 | /* Device does not implement this command, that's OK. */ | |
1276 | return SR_OK; | |
1277 | } | |
1278 | ||
1279 | g_mutex_lock(&scpi->scpi_mutex); | |
1280 | ||
1281 | /* Select channel. */ | |
1282 | channel_cmd = sr_scpi_cmd_get(cmdtable, channel_command); | |
1283 | if (channel_cmd && channel_name && | |
1284 | g_strcmp0(channel_name, scpi->actual_channel_name)) { | |
1285 | sr_spew("sr_scpi_cmd(): new channel = %s", channel_name); | |
1286 | g_free(scpi->actual_channel_name); | |
1287 | scpi->actual_channel_name = g_strdup(channel_name); | |
1288 | ret = scpi_send(scpi, channel_cmd, channel_name); | |
1289 | if (ret != SR_OK) | |
1290 | return ret; | |
1291 | } | |
1292 | ||
1293 | va_start(args, command); | |
1294 | ret = scpi_send_variadic(scpi, cmd, args); | |
1295 | va_end(args); | |
1296 | ||
1297 | g_mutex_unlock(&scpi->scpi_mutex); | |
1298 | ||
1299 | return ret; | |
1300 | } | |
1301 | ||
1302 | SR_PRIV int sr_scpi_cmd_resp(const struct sr_dev_inst *sdi, | |
1303 | const struct scpi_command *cmdtable, | |
1304 | int channel_command, const char *channel_name, | |
1305 | GVariant **gvar, const GVariantType *gvtype, int command, ...) | |
1306 | { | |
1307 | struct sr_scpi_dev_inst *scpi; | |
1308 | va_list args; | |
1309 | const char *channel_cmd; | |
1310 | const char *cmd; | |
1311 | GString *response; | |
1312 | char *s; | |
1313 | gboolean b; | |
1314 | double d; | |
1315 | int ret; | |
1316 | ||
1317 | scpi = sdi->conn; | |
1318 | ||
1319 | if (!(cmd = sr_scpi_cmd_get(cmdtable, command))) { | |
1320 | /* Device does not implement this command. */ | |
1321 | return SR_ERR_NA; | |
1322 | } | |
1323 | ||
1324 | g_mutex_lock(&scpi->scpi_mutex); | |
1325 | ||
1326 | /* Select channel. */ | |
1327 | channel_cmd = sr_scpi_cmd_get(cmdtable, channel_command); | |
1328 | if (channel_cmd && channel_name && | |
1329 | g_strcmp0(channel_name, scpi->actual_channel_name)) { | |
1330 | sr_spew("sr_scpi_cmd_get(): new channel = %s", channel_name); | |
1331 | g_free(scpi->actual_channel_name); | |
1332 | scpi->actual_channel_name = g_strdup(channel_name); | |
1333 | ret = scpi_send(scpi, channel_cmd, channel_name); | |
1334 | if (ret != SR_OK) | |
1335 | return ret; | |
1336 | } | |
1337 | ||
1338 | va_start(args, command); | |
1339 | ret = scpi_send_variadic(scpi, cmd, args); | |
1340 | va_end(args); | |
1341 | if (ret != SR_OK) { | |
1342 | g_mutex_unlock(&scpi->scpi_mutex); | |
1343 | return ret; | |
1344 | } | |
1345 | ||
1346 | response = g_string_sized_new(1024); | |
1347 | ret = scpi_get_data(scpi, NULL, &response); | |
1348 | if (ret != SR_OK) { | |
1349 | g_mutex_unlock(&scpi->scpi_mutex); | |
1350 | if (response) | |
1351 | g_string_free(response, TRUE); | |
1352 | return ret; | |
1353 | } | |
1354 | ||
1355 | g_mutex_unlock(&scpi->scpi_mutex); | |
1356 | ||
1357 | /* Get rid of trailing linefeed if present */ | |
1358 | if (response->len >= 1 && response->str[response->len - 1] == '\n') | |
1359 | g_string_truncate(response, response->len - 1); | |
1360 | ||
1361 | /* Get rid of trailing carriage return if present */ | |
1362 | if (response->len >= 1 && response->str[response->len - 1] == '\r') | |
1363 | g_string_truncate(response, response->len - 1); | |
1364 | ||
1365 | s = g_string_free(response, FALSE); | |
1366 | ||
1367 | ret = SR_OK; | |
1368 | if (g_variant_type_equal(gvtype, G_VARIANT_TYPE_BOOLEAN)) { | |
1369 | if ((ret = parse_strict_bool(s, &b)) == SR_OK) | |
1370 | *gvar = g_variant_new_boolean(b); | |
1371 | } else if (g_variant_type_equal(gvtype, G_VARIANT_TYPE_DOUBLE)) { | |
1372 | if ((ret = sr_atod_ascii(s, &d)) == SR_OK) | |
1373 | *gvar = g_variant_new_double(d); | |
1374 | } else if (g_variant_type_equal(gvtype, G_VARIANT_TYPE_STRING)) { | |
1375 | *gvar = g_variant_new_string(s); | |
1376 | } else { | |
1377 | sr_err("Unable to convert to desired GVariant type."); | |
1378 | ret = SR_ERR_NA; | |
1379 | } | |
1380 | ||
1381 | g_free(s); | |
1382 | ||
1383 | return ret; | |
1384 | } |