]>
Commit | Line | Data |
---|---|---|
1 | /* | |
2 | * This file is part of the libsigrok project. | |
3 | * | |
4 | * Copyright (C) 2013 poljar (Damir Jelić) <poljarinho@gmail.com> | |
5 | * | |
6 | * This program is free software: you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation, either version 3 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
18 | */ | |
19 | ||
20 | #include <config.h> | |
21 | #include <glib.h> | |
22 | #include <string.h> | |
23 | #include <libsigrok/libsigrok.h> | |
24 | #include "libsigrok-internal.h" | |
25 | #include "scpi.h" | |
26 | ||
27 | #define LOG_PREFIX "scpi" | |
28 | ||
29 | #define SCPI_READ_RETRIES 100 | |
30 | #define SCPI_READ_RETRY_TIMEOUT_US (10 * 1000) | |
31 | ||
32 | /** | |
33 | * Parse a string representation of a boolean-like value into a gboolean. | |
34 | * Similar to sr_parse_boolstring but rejects strings which do not represent | |
35 | * a boolean-like value. | |
36 | * | |
37 | * @param str String to convert. | |
38 | * @param ret Pointer to a gboolean where the result of the conversion will be | |
39 | * stored. | |
40 | * | |
41 | * @return SR_OK on success, SR_ERR on failure. | |
42 | */ | |
43 | static int parse_strict_bool(const char *str, gboolean *ret) | |
44 | { | |
45 | if (!str) | |
46 | return SR_ERR_ARG; | |
47 | ||
48 | if (!g_strcmp0(str, "1") || | |
49 | !g_ascii_strncasecmp(str, "y", 1) || | |
50 | !g_ascii_strncasecmp(str, "t", 1) || | |
51 | !g_ascii_strncasecmp(str, "yes", 3) || | |
52 | !g_ascii_strncasecmp(str, "true", 4) || | |
53 | !g_ascii_strncasecmp(str, "on", 2)) { | |
54 | *ret = TRUE; | |
55 | return SR_OK; | |
56 | } else if (!g_strcmp0(str, "0") || | |
57 | !g_ascii_strncasecmp(str, "n", 1) || | |
58 | !g_ascii_strncasecmp(str, "f", 1) || | |
59 | !g_ascii_strncasecmp(str, "no", 2) || | |
60 | !g_ascii_strncasecmp(str, "false", 5) || | |
61 | !g_ascii_strncasecmp(str, "off", 3)) { | |
62 | *ret = FALSE; | |
63 | return SR_OK; | |
64 | } | |
65 | ||
66 | return SR_ERR; | |
67 | } | |
68 | ||
69 | SR_PRIV extern const struct sr_scpi_dev_inst scpi_serial_dev; | |
70 | SR_PRIV extern const struct sr_scpi_dev_inst scpi_tcp_raw_dev; | |
71 | SR_PRIV extern const struct sr_scpi_dev_inst scpi_tcp_rigol_dev; | |
72 | SR_PRIV extern const struct sr_scpi_dev_inst scpi_usbtmc_libusb_dev; | |
73 | SR_PRIV extern const struct sr_scpi_dev_inst scpi_vxi_dev; | |
74 | SR_PRIV extern const struct sr_scpi_dev_inst scpi_visa_dev; | |
75 | SR_PRIV extern const struct sr_scpi_dev_inst scpi_libgpib_dev; | |
76 | ||
77 | static const struct sr_scpi_dev_inst *scpi_devs[] = { | |
78 | &scpi_tcp_raw_dev, | |
79 | &scpi_tcp_rigol_dev, | |
80 | #ifdef HAVE_LIBUSB_1_0 | |
81 | &scpi_usbtmc_libusb_dev, | |
82 | #endif | |
83 | #if HAVE_RPC | |
84 | &scpi_vxi_dev, | |
85 | #endif | |
86 | #ifdef HAVE_LIBREVISA | |
87 | &scpi_visa_dev, | |
88 | #endif | |
89 | #ifdef HAVE_LIBGPIB | |
90 | &scpi_libgpib_dev, | |
91 | #endif | |
92 | #ifdef HAVE_LIBSERIALPORT | |
93 | &scpi_serial_dev, /* Must be last as it matches any resource. */ | |
94 | #endif | |
95 | }; | |
96 | ||
97 | static struct sr_dev_inst *sr_scpi_scan_resource(struct drv_context *drvc, | |
98 | const char *resource, const char *serialcomm, | |
99 | struct sr_dev_inst *(*probe_device)(struct sr_scpi_dev_inst *scpi)) | |
100 | { | |
101 | struct sr_scpi_dev_inst *scpi; | |
102 | struct sr_dev_inst *sdi; | |
103 | ||
104 | if (!(scpi = scpi_dev_inst_new(drvc, resource, serialcomm))) | |
105 | return NULL; | |
106 | ||
107 | if (sr_scpi_open(scpi) != SR_OK) { | |
108 | sr_info("Couldn't open SCPI device."); | |
109 | sr_scpi_free(scpi); | |
110 | return NULL; | |
111 | }; | |
112 | ||
113 | sdi = probe_device(scpi); | |
114 | ||
115 | sr_scpi_close(scpi); | |
116 | ||
117 | if (sdi) | |
118 | sdi->status = SR_ST_INACTIVE; | |
119 | else | |
120 | sr_scpi_free(scpi); | |
121 | ||
122 | return sdi; | |
123 | } | |
124 | ||
125 | SR_PRIV GSList *sr_scpi_scan(struct drv_context *drvc, GSList *options, | |
126 | struct sr_dev_inst *(*probe_device)(struct sr_scpi_dev_inst *scpi)) | |
127 | { | |
128 | GSList *resources, *l, *devices; | |
129 | struct sr_dev_inst *sdi; | |
130 | const char *resource = NULL; | |
131 | const char *serialcomm = NULL; | |
132 | gchar **res; | |
133 | unsigned i; | |
134 | ||
135 | for (l = options; l; l = l->next) { | |
136 | struct sr_config *src = l->data; | |
137 | switch (src->key) { | |
138 | case SR_CONF_CONN: | |
139 | resource = g_variant_get_string(src->data, NULL); | |
140 | break; | |
141 | case SR_CONF_SERIALCOMM: | |
142 | serialcomm = g_variant_get_string(src->data, NULL); | |
143 | break; | |
144 | } | |
145 | } | |
146 | ||
147 | devices = NULL; | |
148 | for (i = 0; i < ARRAY_SIZE(scpi_devs); i++) { | |
149 | if ((resource && strcmp(resource, scpi_devs[i]->prefix)) | |
150 | || !scpi_devs[i]->scan) | |
151 | continue; | |
152 | resources = scpi_devs[i]->scan(drvc); | |
153 | for (l = resources; l; l = l->next) { | |
154 | res = g_strsplit(l->data, ":", 2); | |
155 | if (res[0] && (sdi = sr_scpi_scan_resource(drvc, res[0], | |
156 | serialcomm ? serialcomm : res[1], probe_device))) { | |
157 | devices = g_slist_append(devices, sdi); | |
158 | sdi->connection_id = g_strdup(l->data); | |
159 | } | |
160 | g_strfreev(res); | |
161 | } | |
162 | g_slist_free_full(resources, g_free); | |
163 | } | |
164 | ||
165 | if (!devices && resource) { | |
166 | sdi = sr_scpi_scan_resource(drvc, resource, serialcomm, probe_device); | |
167 | if (sdi) | |
168 | devices = g_slist_append(NULL, sdi); | |
169 | } | |
170 | ||
171 | /* Tack a copy of the newly found devices onto the driver list. */ | |
172 | if (devices) | |
173 | drvc->instances = g_slist_concat(drvc->instances, g_slist_copy(devices)); | |
174 | ||
175 | return devices; | |
176 | } | |
177 | ||
178 | SR_PRIV struct sr_scpi_dev_inst *scpi_dev_inst_new(struct drv_context *drvc, | |
179 | const char *resource, const char *serialcomm) | |
180 | { | |
181 | struct sr_scpi_dev_inst *scpi = NULL; | |
182 | const struct sr_scpi_dev_inst *scpi_dev; | |
183 | gchar **params; | |
184 | unsigned i; | |
185 | ||
186 | for (i = 0; i < ARRAY_SIZE(scpi_devs); i++) { | |
187 | scpi_dev = scpi_devs[i]; | |
188 | if (!strncmp(resource, scpi_dev->prefix, strlen(scpi_dev->prefix))) { | |
189 | sr_dbg("Opening %s device %s.", scpi_dev->name, resource); | |
190 | scpi = g_malloc(sizeof(*scpi)); | |
191 | *scpi = *scpi_dev; | |
192 | scpi->priv = g_malloc0(scpi->priv_size); | |
193 | scpi->read_timeout_ms = 1000; | |
194 | params = g_strsplit(resource, "/", 0); | |
195 | if (scpi->dev_inst_new(scpi->priv, drvc, resource, | |
196 | params, serialcomm) != SR_OK) { | |
197 | sr_scpi_free(scpi); | |
198 | scpi = NULL; | |
199 | } | |
200 | g_strfreev(params); | |
201 | break; | |
202 | } | |
203 | } | |
204 | ||
205 | return scpi; | |
206 | } | |
207 | ||
208 | /** | |
209 | * Open SCPI device. | |
210 | * | |
211 | * @param scpi Previously initialized SCPI device structure. | |
212 | * | |
213 | * @return SR_OK on success, SR_ERR on failure. | |
214 | */ | |
215 | SR_PRIV int sr_scpi_open(struct sr_scpi_dev_inst *scpi) | |
216 | { | |
217 | return scpi->open(scpi); | |
218 | } | |
219 | ||
220 | /** | |
221 | * Add an event source for an SCPI device. | |
222 | * | |
223 | * @param session The session to add the event source to. | |
224 | * @param scpi Previously initialized SCPI device structure. | |
225 | * @param events Events to check for. | |
226 | * @param timeout Max time to wait before the callback is called, ignored if 0. | |
227 | * @param cb Callback function to add. Must not be NULL. | |
228 | * @param cb_data Data for the callback function. Can be NULL. | |
229 | * | |
230 | * @return SR_OK upon success, SR_ERR_ARG upon invalid arguments, or | |
231 | * SR_ERR_MALLOC upon memory allocation errors. | |
232 | */ | |
233 | SR_PRIV int sr_scpi_source_add(struct sr_session *session, | |
234 | struct sr_scpi_dev_inst *scpi, int events, int timeout, | |
235 | sr_receive_data_callback cb, void *cb_data) | |
236 | { | |
237 | return scpi->source_add(session, scpi->priv, events, timeout, cb, cb_data); | |
238 | } | |
239 | ||
240 | /** | |
241 | * Remove event source for an SCPI device. | |
242 | * | |
243 | * @param session The session to remove the event source from. | |
244 | * @param scpi Previously initialized SCPI device structure. | |
245 | * | |
246 | * @return SR_OK upon success, SR_ERR_ARG upon invalid arguments, or | |
247 | * SR_ERR_MALLOC upon memory allocation errors, SR_ERR_BUG upon | |
248 | * internal errors. | |
249 | */ | |
250 | SR_PRIV int sr_scpi_source_remove(struct sr_session *session, | |
251 | struct sr_scpi_dev_inst *scpi) | |
252 | { | |
253 | return scpi->source_remove(session, scpi->priv); | |
254 | } | |
255 | ||
256 | /** | |
257 | * Send a SCPI command. | |
258 | * | |
259 | * @param scpi Previously initialized SCPI device structure. | |
260 | * @param format Format string, to be followed by any necessary arguments. | |
261 | * | |
262 | * @return SR_OK on success, SR_ERR on failure. | |
263 | */ | |
264 | SR_PRIV int sr_scpi_send(struct sr_scpi_dev_inst *scpi, | |
265 | const char *format, ...) | |
266 | { | |
267 | va_list args; | |
268 | int ret; | |
269 | ||
270 | va_start(args, format); | |
271 | ret = sr_scpi_send_variadic(scpi, format, args); | |
272 | va_end(args); | |
273 | ||
274 | return ret; | |
275 | } | |
276 | ||
277 | /** | |
278 | * Send a SCPI command with a variadic argument list. | |
279 | * | |
280 | * @param scpi Previously initialized SCPI device structure. | |
281 | * @param format Format string. | |
282 | * @param args Argument list. | |
283 | * | |
284 | * @return SR_OK on success, SR_ERR on failure. | |
285 | */ | |
286 | SR_PRIV int sr_scpi_send_variadic(struct sr_scpi_dev_inst *scpi, | |
287 | const char *format, va_list args) | |
288 | { | |
289 | va_list args_copy; | |
290 | char *buf; | |
291 | int len, ret; | |
292 | ||
293 | /* Get length of buffer required. */ | |
294 | va_copy(args_copy, args); | |
295 | len = vsnprintf(NULL, 0, format, args_copy); | |
296 | va_end(args_copy); | |
297 | ||
298 | /* Allocate buffer and write out command. */ | |
299 | buf = g_malloc0(len + 2); | |
300 | vsprintf(buf, format, args); | |
301 | if (buf[len - 1] != '\n') | |
302 | buf[len] = '\n'; | |
303 | ||
304 | /* Send command. */ | |
305 | ret = scpi->send(scpi->priv, buf); | |
306 | ||
307 | /* Free command buffer. */ | |
308 | g_free(buf); | |
309 | ||
310 | return ret; | |
311 | } | |
312 | ||
313 | /** | |
314 | * Begin receiving an SCPI reply. | |
315 | * | |
316 | * @param scpi Previously initialised SCPI device structure. | |
317 | * | |
318 | * @return SR_OK on success, SR_ERR on failure. | |
319 | */ | |
320 | SR_PRIV int sr_scpi_read_begin(struct sr_scpi_dev_inst *scpi) | |
321 | { | |
322 | return scpi->read_begin(scpi->priv); | |
323 | } | |
324 | ||
325 | /** | |
326 | * Read part of a response from SCPI device. | |
327 | * | |
328 | * @param scpi Previously initialised SCPI device structure. | |
329 | * @param buf Buffer to store result. | |
330 | * @param maxlen Maximum number of bytes to read. | |
331 | * | |
332 | * @return Number of bytes read, or SR_ERR upon failure. | |
333 | */ | |
334 | SR_PRIV int sr_scpi_read_data(struct sr_scpi_dev_inst *scpi, | |
335 | char *buf, int maxlen) | |
336 | { | |
337 | return scpi->read_data(scpi->priv, buf, maxlen); | |
338 | } | |
339 | ||
340 | /** | |
341 | * Check whether a complete SCPI response has been received. | |
342 | * | |
343 | * @param scpi Previously initialised SCPI device structure. | |
344 | * | |
345 | * @return 1 if complete, 0 otherwise. | |
346 | */ | |
347 | SR_PRIV int sr_scpi_read_complete(struct sr_scpi_dev_inst *scpi) | |
348 | { | |
349 | return scpi->read_complete(scpi->priv); | |
350 | } | |
351 | ||
352 | /** | |
353 | * Close SCPI device. | |
354 | * | |
355 | * @param scpi Previously initialized SCPI device structure. | |
356 | * | |
357 | * @return SR_OK on success, SR_ERR on failure. | |
358 | */ | |
359 | SR_PRIV int sr_scpi_close(struct sr_scpi_dev_inst *scpi) | |
360 | { | |
361 | return scpi->close(scpi); | |
362 | } | |
363 | ||
364 | /** | |
365 | * Free SCPI device. | |
366 | * | |
367 | * @param scpi Previously initialized SCPI device structure. | |
368 | * | |
369 | * @return SR_OK on success, SR_ERR on failure. | |
370 | */ | |
371 | SR_PRIV void sr_scpi_free(struct sr_scpi_dev_inst *scpi) | |
372 | { | |
373 | scpi->free(scpi->priv); | |
374 | g_free(scpi->priv); | |
375 | g_free(scpi); | |
376 | } | |
377 | ||
378 | /** | |
379 | * Send a SCPI command, receive the reply and store the reply in scpi_response. | |
380 | * | |
381 | * @param scpi Previously initialised SCPI device structure. | |
382 | * @param command The SCPI command to send to the device (can be NULL). | |
383 | * @param scpi_response Pointer where to store the SCPI response. | |
384 | * | |
385 | * @return SR_OK on success, SR_ERR* on failure. | |
386 | */ | |
387 | SR_PRIV int sr_scpi_get_string(struct sr_scpi_dev_inst *scpi, | |
388 | const char *command, char **scpi_response) | |
389 | { | |
390 | GString *response; | |
391 | response = g_string_sized_new(1024); | |
392 | ||
393 | if (sr_scpi_get_data(scpi, command, &response) != SR_OK) { | |
394 | if (response) | |
395 | g_string_free(response, TRUE); | |
396 | return SR_ERR; | |
397 | } | |
398 | ||
399 | /* Get rid of trailing linefeed if present */ | |
400 | if (response->len >= 1 && response->str[response->len - 1] == '\n') | |
401 | g_string_truncate(response, response->len - 1); | |
402 | ||
403 | /* Get rid of trailing carriage return if present */ | |
404 | if (response->len >= 1 && response->str[response->len - 1] == '\r') | |
405 | g_string_truncate(response, response->len - 1); | |
406 | ||
407 | sr_spew("Got response: '%.70s', length %" G_GSIZE_FORMAT ".", | |
408 | response->str, response->len); | |
409 | ||
410 | *scpi_response = g_string_free(response, FALSE); | |
411 | ||
412 | return SR_OK; | |
413 | } | |
414 | ||
415 | SR_PRIV int sr_scpi_get_data(struct sr_scpi_dev_inst *scpi, | |
416 | const char *command, GString **scpi_response) | |
417 | { | |
418 | int len; | |
419 | GString *response; | |
420 | gint64 laststart; | |
421 | unsigned int elapsed_ms; | |
422 | unsigned int offset; | |
423 | int space; | |
424 | ||
425 | if (command) { | |
426 | if (sr_scpi_send(scpi, command) != SR_OK) | |
427 | return SR_ERR; | |
428 | } | |
429 | ||
430 | if (sr_scpi_read_begin(scpi) != SR_OK) | |
431 | return SR_ERR; | |
432 | ||
433 | laststart = g_get_monotonic_time(); | |
434 | ||
435 | response = *scpi_response; | |
436 | ||
437 | offset = response->len; | |
438 | ||
439 | while (!sr_scpi_read_complete(scpi)) { | |
440 | space = response->allocated_len - response->len; | |
441 | if (space < 128) { | |
442 | g_string_set_size(response, response->len + 1024); | |
443 | space = response->allocated_len - response->len; | |
444 | } | |
445 | len = sr_scpi_read_data(scpi, &response->str[offset], space); | |
446 | if (len < 0) { | |
447 | sr_err("Incompletely read SCPI response."); | |
448 | return SR_ERR; | |
449 | } else if (len > 0) { | |
450 | laststart = g_get_monotonic_time(); | |
451 | } | |
452 | offset += len; | |
453 | g_string_set_size(response, offset); | |
454 | elapsed_ms = (g_get_monotonic_time() - laststart) / 1000; | |
455 | if (elapsed_ms >= scpi->read_timeout_ms) { | |
456 | sr_err("Timed out waiting for SCPI response."); | |
457 | return SR_ERR; | |
458 | } | |
459 | } | |
460 | ||
461 | return SR_OK; | |
462 | } | |
463 | ||
464 | /** | |
465 | * Send a SCPI command, read the reply, parse it as a bool value and store the | |
466 | * result in scpi_response. | |
467 | * | |
468 | * @param scpi Previously initialised SCPI device structure. | |
469 | * @param command The SCPI command to send to the device (can be NULL). | |
470 | * @param scpi_response Pointer where to store the parsed result. | |
471 | * | |
472 | * @return SR_OK on success, SR_ERR* on failure. | |
473 | */ | |
474 | SR_PRIV int sr_scpi_get_bool(struct sr_scpi_dev_inst *scpi, | |
475 | const char *command, gboolean *scpi_response) | |
476 | { | |
477 | int ret; | |
478 | char *response; | |
479 | ||
480 | response = NULL; | |
481 | ||
482 | ret = sr_scpi_get_string(scpi, command, &response); | |
483 | if (ret != SR_OK && !response) | |
484 | return ret; | |
485 | ||
486 | if (parse_strict_bool(response, scpi_response) == SR_OK) | |
487 | ret = SR_OK; | |
488 | else | |
489 | ret = SR_ERR_DATA; | |
490 | ||
491 | g_free(response); | |
492 | ||
493 | return ret; | |
494 | } | |
495 | ||
496 | /** | |
497 | * Send a SCPI command, read the reply, parse it as an integer and store the | |
498 | * result in scpi_response. | |
499 | * | |
500 | * @param scpi Previously initialised SCPI device structure. | |
501 | * @param command The SCPI command to send to the device (can be NULL). | |
502 | * @param scpi_response Pointer where to store the parsed result. | |
503 | * | |
504 | * @return SR_OK on success, SR_ERR* on failure. | |
505 | */ | |
506 | SR_PRIV int sr_scpi_get_int(struct sr_scpi_dev_inst *scpi, | |
507 | const char *command, int *scpi_response) | |
508 | { | |
509 | int ret; | |
510 | char *response; | |
511 | ||
512 | response = NULL; | |
513 | ||
514 | ret = sr_scpi_get_string(scpi, command, &response); | |
515 | if (ret != SR_OK && !response) | |
516 | return ret; | |
517 | ||
518 | if (sr_atoi(response, scpi_response) == SR_OK) | |
519 | ret = SR_OK; | |
520 | else | |
521 | ret = SR_ERR_DATA; | |
522 | ||
523 | g_free(response); | |
524 | ||
525 | return ret; | |
526 | } | |
527 | ||
528 | /** | |
529 | * Send a SCPI command, read the reply, parse it as a float and store the | |
530 | * result in scpi_response. | |
531 | * | |
532 | * @param scpi Previously initialised SCPI device structure. | |
533 | * @param command The SCPI command to send to the device (can be NULL). | |
534 | * @param scpi_response Pointer where to store the parsed result. | |
535 | * | |
536 | * @return SR_OK on success, SR_ERR* on failure. | |
537 | */ | |
538 | SR_PRIV int sr_scpi_get_float(struct sr_scpi_dev_inst *scpi, | |
539 | const char *command, float *scpi_response) | |
540 | { | |
541 | int ret; | |
542 | char *response; | |
543 | ||
544 | response = NULL; | |
545 | ||
546 | ret = sr_scpi_get_string(scpi, command, &response); | |
547 | if (ret != SR_OK && !response) | |
548 | return ret; | |
549 | ||
550 | if (sr_atof_ascii(response, scpi_response) == SR_OK) | |
551 | ret = SR_OK; | |
552 | else | |
553 | ret = SR_ERR_DATA; | |
554 | ||
555 | g_free(response); | |
556 | ||
557 | return ret; | |
558 | } | |
559 | ||
560 | /** | |
561 | * Send a SCPI command, read the reply, parse it as a double and store the | |
562 | * result in scpi_response. | |
563 | * | |
564 | * @param scpi Previously initialised SCPI device structure. | |
565 | * @param command The SCPI command to send to the device (can be NULL). | |
566 | * @param scpi_response Pointer where to store the parsed result. | |
567 | * | |
568 | * @return SR_OK on success, SR_ERR* on failure. | |
569 | */ | |
570 | SR_PRIV int sr_scpi_get_double(struct sr_scpi_dev_inst *scpi, | |
571 | const char *command, double *scpi_response) | |
572 | { | |
573 | int ret; | |
574 | char *response; | |
575 | ||
576 | response = NULL; | |
577 | ||
578 | ret = sr_scpi_get_string(scpi, command, &response); | |
579 | if (ret != SR_OK && !response) | |
580 | return ret; | |
581 | ||
582 | if (sr_atod(response, scpi_response) == SR_OK) | |
583 | ret = SR_OK; | |
584 | else | |
585 | ret = SR_ERR_DATA; | |
586 | ||
587 | g_free(response); | |
588 | ||
589 | return ret; | |
590 | } | |
591 | ||
592 | /** | |
593 | * Send a SCPI *OPC? command, read the reply and return the result of the | |
594 | * command. | |
595 | * | |
596 | * @param scpi Previously initialised SCPI device structure. | |
597 | * | |
598 | * @return SR_OK on success, SR_ERR* on failure. | |
599 | */ | |
600 | SR_PRIV int sr_scpi_get_opc(struct sr_scpi_dev_inst *scpi) | |
601 | { | |
602 | unsigned int i; | |
603 | gboolean opc; | |
604 | ||
605 | for (i = 0; i < SCPI_READ_RETRIES; i++) { | |
606 | sr_scpi_get_bool(scpi, SCPI_CMD_OPC, &opc); | |
607 | if (opc) | |
608 | return SR_OK; | |
609 | g_usleep(SCPI_READ_RETRY_TIMEOUT_US); | |
610 | } | |
611 | ||
612 | return SR_ERR; | |
613 | } | |
614 | ||
615 | /** | |
616 | * Send a SCPI command, read the reply, parse it as comma separated list of | |
617 | * floats and store the as an result in scpi_response. | |
618 | * | |
619 | * @param scpi Previously initialised SCPI device structure. | |
620 | * @param command The SCPI command to send to the device (can be NULL). | |
621 | * @param scpi_response Pointer where to store the parsed result. | |
622 | * | |
623 | * @return SR_OK upon successfully parsing all values, SR_ERR* upon a parsing | |
624 | * error or upon no response. The allocated response must be freed by | |
625 | * the caller in the case of an SR_OK as well as in the case of | |
626 | * parsing error. | |
627 | */ | |
628 | SR_PRIV int sr_scpi_get_floatv(struct sr_scpi_dev_inst *scpi, | |
629 | const char *command, GArray **scpi_response) | |
630 | { | |
631 | int ret; | |
632 | float tmp; | |
633 | char *response; | |
634 | gchar **ptr, **tokens; | |
635 | GArray *response_array; | |
636 | ||
637 | response = NULL; | |
638 | tokens = NULL; | |
639 | ||
640 | ret = sr_scpi_get_string(scpi, command, &response); | |
641 | if (ret != SR_OK && !response) | |
642 | return ret; | |
643 | ||
644 | tokens = g_strsplit(response, ",", 0); | |
645 | ptr = tokens; | |
646 | ||
647 | response_array = g_array_sized_new(TRUE, FALSE, sizeof(float), 256); | |
648 | ||
649 | while (*ptr) { | |
650 | if (sr_atof_ascii(*ptr, &tmp) == SR_OK) | |
651 | response_array = g_array_append_val(response_array, | |
652 | tmp); | |
653 | else | |
654 | ret = SR_ERR_DATA; | |
655 | ||
656 | ptr++; | |
657 | } | |
658 | g_strfreev(tokens); | |
659 | g_free(response); | |
660 | ||
661 | if (ret != SR_OK && response_array->len == 0) { | |
662 | g_array_free(response_array, TRUE); | |
663 | *scpi_response = NULL; | |
664 | return SR_ERR_DATA; | |
665 | } | |
666 | ||
667 | *scpi_response = response_array; | |
668 | ||
669 | return ret; | |
670 | } | |
671 | ||
672 | /** | |
673 | * Send a SCPI command, read the reply, parse it as comma separated list of | |
674 | * unsigned 8 bit integers and store the as an result in scpi_response. | |
675 | * | |
676 | * @param scpi Previously initialised SCPI device structure. | |
677 | * @param command The SCPI command to send to the device (can be NULL). | |
678 | * @param scpi_response Pointer where to store the parsed result. | |
679 | * | |
680 | * @return SR_OK upon successfully parsing all values, SR_ERR* upon a parsing | |
681 | * error or upon no response. The allocated response must be freed by | |
682 | * the caller in the case of an SR_OK as well as in the case of | |
683 | * parsing error. | |
684 | */ | |
685 | SR_PRIV int sr_scpi_get_uint8v(struct sr_scpi_dev_inst *scpi, | |
686 | const char *command, GArray **scpi_response) | |
687 | { | |
688 | int tmp, ret; | |
689 | char *response; | |
690 | gchar **ptr, **tokens; | |
691 | GArray *response_array; | |
692 | ||
693 | response = NULL; | |
694 | tokens = NULL; | |
695 | ||
696 | ret = sr_scpi_get_string(scpi, command, &response); | |
697 | if (ret != SR_OK && !response) | |
698 | return ret; | |
699 | ||
700 | tokens = g_strsplit(response, ",", 0); | |
701 | ptr = tokens; | |
702 | ||
703 | response_array = g_array_sized_new(TRUE, FALSE, sizeof(uint8_t), 256); | |
704 | ||
705 | while (*ptr) { | |
706 | if (sr_atoi(*ptr, &tmp) == SR_OK) | |
707 | response_array = g_array_append_val(response_array, | |
708 | tmp); | |
709 | else | |
710 | ret = SR_ERR_DATA; | |
711 | ||
712 | ptr++; | |
713 | } | |
714 | g_strfreev(tokens); | |
715 | g_free(response); | |
716 | ||
717 | if (response_array->len == 0) { | |
718 | g_array_free(response_array, TRUE); | |
719 | *scpi_response = NULL; | |
720 | return SR_ERR_DATA; | |
721 | } | |
722 | ||
723 | *scpi_response = response_array; | |
724 | ||
725 | return ret; | |
726 | } | |
727 | ||
728 | /** | |
729 | * Send a SCPI command, read the reply, parse it as binary data with a | |
730 | * "definite length block" header and store the as an result in scpi_response. | |
731 | * | |
732 | * @param scpi Previously initialised SCPI device structure. | |
733 | * @param command The SCPI command to send to the device (can be NULL). | |
734 | * @param scpi_response Pointer where to store the parsed result. | |
735 | * | |
736 | * @return SR_OK upon successfully parsing all values, SR_ERR* upon a parsing | |
737 | * error or upon no response. The allocated response must be freed by | |
738 | * the caller in the case of an SR_OK as well as in the case of | |
739 | * parsing error. | |
740 | */ | |
741 | SR_PRIV int sr_scpi_get_block(struct sr_scpi_dev_inst *scpi, | |
742 | const char *command, GByteArray **scpi_response) | |
743 | { | |
744 | int ret; | |
745 | GString* response; | |
746 | char buf[10]; | |
747 | long llen; | |
748 | long datalen; | |
749 | ||
750 | /* | |
751 | * Assume an initial maximum length, optionally gets adjusted below. | |
752 | * Prepare a NULL return value for when error paths will be taken. | |
753 | */ | |
754 | response = g_string_sized_new(1024); | |
755 | *scpi_response = NULL; | |
756 | ||
757 | /* Get (the first chunk of) the response. */ | |
758 | ret = sr_scpi_get_data(scpi, command, &response); | |
759 | if (ret != SR_OK) { | |
760 | g_string_free(response, TRUE); | |
761 | return ret; | |
762 | } | |
763 | ||
764 | /* | |
765 | * SCPI protocol data blocks are preceeded with a length spec. | |
766 | * The length spec consists of a '#' marker, one digit which | |
767 | * specifies the character count of the length spec, and the | |
768 | * respective number of characters which specify the data block's | |
769 | * length. Raw data bytes follow (thus one must no longer assume | |
770 | * that the received input stream would be an ASCIIZ string). | |
771 | * | |
772 | * Get the data block length, and strip off the length spec from | |
773 | * the input buffer, leaving just the data bytes. | |
774 | */ | |
775 | if (response->str[0] != '#') { | |
776 | g_string_free(response, TRUE); | |
777 | return SR_ERR_DATA; | |
778 | } | |
779 | buf[0] = response->str[1]; | |
780 | buf[1] = '\0'; | |
781 | ret = sr_atol(buf, &llen); | |
782 | if ((ret != SR_OK) || (llen == 0)) { | |
783 | g_string_free(response, TRUE); | |
784 | return ret; | |
785 | } | |
786 | memcpy(buf, &response->str[2], llen); | |
787 | buf[llen] = '\0'; | |
788 | ret = sr_atol(buf, &datalen); | |
789 | if ((ret != SR_OK) || (datalen == 0)) { | |
790 | g_string_free(response, TRUE); | |
791 | return ret; | |
792 | } | |
793 | g_string_erase(response, 0, 2 + llen); | |
794 | ||
795 | /* | |
796 | * If the initially assumed length does not cover the data block | |
797 | * length, then re-allocate the buffer size to the now known | |
798 | * length, and keep reading more chunks of response data. | |
799 | */ | |
800 | if (response->len < (unsigned long)(datalen)) { | |
801 | int oldlen = response->len; | |
802 | g_string_set_size(response, datalen); | |
803 | g_string_set_size(response, oldlen); | |
804 | } | |
805 | while (response->len < (unsigned long)(datalen)) { | |
806 | ret = sr_scpi_get_data(scpi, NULL, &response); | |
807 | if (ret != SR_OK) { | |
808 | g_string_free(response, TRUE); | |
809 | return ret; | |
810 | } | |
811 | } | |
812 | ||
813 | /* Convert received data to byte array. */ | |
814 | *scpi_response = g_byte_array_new_take( | |
815 | (guint8*)g_string_free(response, FALSE), datalen); | |
816 | ||
817 | return ret; | |
818 | } | |
819 | ||
820 | /** | |
821 | * Send the *IDN? SCPI command, receive the reply, parse it and store the | |
822 | * reply as a sr_scpi_hw_info structure in the supplied scpi_response pointer. | |
823 | * | |
824 | * The hw_info structure must be freed by the caller via sr_scpi_hw_info_free(). | |
825 | * | |
826 | * @param scpi Previously initialised SCPI device structure. | |
827 | * @param scpi_response Pointer where to store the hw_info structure. | |
828 | * | |
829 | * @return SR_OK upon success, SR_ERR* on failure. | |
830 | */ | |
831 | SR_PRIV int sr_scpi_get_hw_id(struct sr_scpi_dev_inst *scpi, | |
832 | struct sr_scpi_hw_info **scpi_response) | |
833 | { | |
834 | int num_tokens, ret; | |
835 | char *response; | |
836 | gchar **tokens; | |
837 | struct sr_scpi_hw_info *hw_info; | |
838 | ||
839 | response = NULL; | |
840 | tokens = NULL; | |
841 | ||
842 | ret = sr_scpi_get_string(scpi, SCPI_CMD_IDN, &response); | |
843 | if (ret != SR_OK && !response) | |
844 | return ret; | |
845 | ||
846 | sr_info("Got IDN string: '%s'", response); | |
847 | ||
848 | /* | |
849 | * The response to a '*IDN?' is specified by the SCPI spec. It contains | |
850 | * a comma-separated list containing the manufacturer name, instrument | |
851 | * model, serial number of the instrument and the firmware version. | |
852 | */ | |
853 | tokens = g_strsplit(response, ",", 0); | |
854 | ||
855 | for (num_tokens = 0; tokens[num_tokens] != NULL; num_tokens++); | |
856 | ||
857 | if (num_tokens < 4) { | |
858 | sr_dbg("IDN response not according to spec: %80.s.", response); | |
859 | g_strfreev(tokens); | |
860 | g_free(response); | |
861 | return SR_ERR_DATA; | |
862 | } | |
863 | g_free(response); | |
864 | ||
865 | hw_info = g_malloc0(sizeof(struct sr_scpi_hw_info)); | |
866 | hw_info->manufacturer = g_strstrip(g_strdup(tokens[0])); | |
867 | hw_info->model = g_strstrip(g_strdup(tokens[1])); | |
868 | hw_info->serial_number = g_strstrip(g_strdup(tokens[2])); | |
869 | hw_info->firmware_version = g_strstrip(g_strdup(tokens[3])); | |
870 | ||
871 | g_strfreev(tokens); | |
872 | ||
873 | *scpi_response = hw_info; | |
874 | ||
875 | return SR_OK; | |
876 | } | |
877 | ||
878 | /** | |
879 | * Free a sr_scpi_hw_info struct. | |
880 | * | |
881 | * @param hw_info Pointer to the struct to free. | |
882 | * | |
883 | * This function is safe to call with a NULL pointer. | |
884 | */ | |
885 | SR_PRIV void sr_scpi_hw_info_free(struct sr_scpi_hw_info *hw_info) | |
886 | { | |
887 | if (hw_info) { | |
888 | g_free(hw_info->manufacturer); | |
889 | g_free(hw_info->model); | |
890 | g_free(hw_info->serial_number); | |
891 | g_free(hw_info->firmware_version); | |
892 | g_free(hw_info); | |
893 | } | |
894 | } |