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scpi-pps: Add shadow driver for HPIB supplies (ID? instead of *IDN?)
[libsigrok.git] / src / hardware / scpi-pps / api.c
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1/*
2 * This file is part of the libsigrok project.
3 *
4 * Copyright (C) 2014 Bert Vermeulen <bert@biot.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 <string.h>
22#include <strings.h>
23#include "scpi.h"
24#include "protocol.h"
25
26static struct sr_dev_driver scpi_pps_driver_info;
27static struct sr_dev_driver hp_ib_pps_driver_info;
28
29static const uint32_t scanopts[] = {
30 SR_CONF_CONN,
31 SR_CONF_SERIALCOMM,
32};
33
34static const uint32_t drvopts[] = {
35 SR_CONF_POWER_SUPPLY,
36};
37
38static const struct pps_channel_instance pci[] = {
39 { SR_MQ_VOLTAGE, SCPI_CMD_GET_MEAS_VOLTAGE, "V" },
40 { SR_MQ_CURRENT, SCPI_CMD_GET_MEAS_CURRENT, "I" },
41 { SR_MQ_POWER, SCPI_CMD_GET_MEAS_POWER, "P" },
42 { SR_MQ_FREQUENCY, SCPI_CMD_GET_MEAS_FREQUENCY, "F" },
43};
44
45static struct sr_dev_inst *probe_device(struct sr_scpi_dev_inst *scpi,
46 int (*get_hw_id)(struct sr_scpi_dev_inst *scpi,
47 struct sr_scpi_hw_info **scpi_response)
48 )
49{
50 struct dev_context *devc;
51 struct sr_dev_inst *sdi;
52 struct sr_scpi_hw_info *hw_info;
53 struct sr_channel_group *cg;
54 struct sr_channel *ch;
55 const struct scpi_pps *device;
56 struct pps_channel *pch;
57 struct channel_spec *channels;
58 struct channel_group_spec *channel_groups, *cgs;
59 struct pps_channel_group *pcg;
60 GRegex *model_re;
61 GMatchInfo *model_mi;
62 GSList *l;
63 uint64_t mask;
64 unsigned int num_channels, num_channel_groups, ch_num, ch_idx, i, j;
65 int ret;
66 const char *vendor;
67 char ch_name[16];
68
69 if (get_hw_id(scpi, &hw_info) != SR_OK) {
70 sr_info("Couldn't get IDN response.");
71 return NULL;
72 }
73
74 device = NULL;
75 for (i = 0; i < num_pps_profiles; i++) {
76 vendor = sr_vendor_alias(hw_info->manufacturer);
77 if (g_ascii_strcasecmp(vendor, pps_profiles[i].vendor))
78 continue;
79 model_re = g_regex_new(pps_profiles[i].model, 0, 0, NULL);
80 if (g_regex_match(model_re, hw_info->model, 0, &model_mi))
81 device = &pps_profiles[i];
82 g_match_info_unref(model_mi);
83 g_regex_unref(model_re);
84 if (device)
85 break;
86 }
87 if (!device) {
88 sr_scpi_hw_info_free(hw_info);
89 return NULL;
90 }
91
92 sdi = g_malloc0(sizeof(struct sr_dev_inst));
93 sdi->vendor = g_strdup(vendor);
94 sdi->model = g_strdup(hw_info->model);
95 sdi->version = g_strdup(hw_info->firmware_version);
96 sdi->conn = scpi;
97 sdi->driver = &scpi_pps_driver_info;
98 sdi->inst_type = SR_INST_SCPI;
99 sdi->serial_num = g_strdup(hw_info->serial_number);
100
101 devc = g_malloc0(sizeof(struct dev_context));
102 devc->device = device;
103 sdi->priv = devc;
104
105 if (device->num_channels) {
106 /* Static channels and groups. */
107 channels = (struct channel_spec *)device->channels;
108 num_channels = device->num_channels;
109 channel_groups = (struct channel_group_spec *)device->channel_groups;
110 num_channel_groups = device->num_channel_groups;
111 } else {
112 /* Channels and groups need to be probed. */
113 ret = device->probe_channels(sdi, hw_info, &channels, &num_channels,
114 &channel_groups, &num_channel_groups);
115 if (ret != SR_OK) {
116 sr_err("Failed to probe for channels.");
117 return NULL;
118 }
119 /*
120 * Since these were dynamically allocated, we'll need to free them
121 * later.
122 */
123 devc->channels = channels;
124 devc->channel_groups = channel_groups;
125 }
126
127 ch_idx = 0;
128 for (ch_num = 0; ch_num < num_channels; ch_num++) {
129 /* Create one channel per measurable output unit. */
130 for (i = 0; i < ARRAY_SIZE(pci); i++) {
131 if (!scpi_cmd_get(devc->device->commands, pci[i].command))
132 continue;
133 g_snprintf(ch_name, 16, "%s%s", pci[i].prefix,
134 channels[ch_num].name);
135 ch = sr_channel_new(sdi, ch_idx++, SR_CHANNEL_ANALOG, TRUE,
136 ch_name);
137 pch = g_malloc0(sizeof(struct pps_channel));
138 pch->hw_output_idx = ch_num;
139 pch->hwname = channels[ch_num].name;
140 pch->mq = pci[i].mq;
141 ch->priv = pch;
142 }
143 }
144
145 for (i = 0; i < num_channel_groups; i++) {
146 cgs = &channel_groups[i];
147 cg = g_malloc0(sizeof(struct sr_channel_group));
148 cg->name = g_strdup(cgs->name);
149 for (j = 0, mask = 1; j < 64; j++, mask <<= 1) {
150 if (cgs->channel_index_mask & mask) {
151 for (l = sdi->channels; l; l = l->next) {
152 ch = l->data;
153 pch = ch->priv;
154 if (pch->hw_output_idx == j)
155 cg->channels = g_slist_append(cg->channels, ch);
156 }
157 }
158 }
159 pcg = g_malloc0(sizeof(struct pps_channel_group));
160 pcg->features = cgs->features;
161 cg->priv = pcg;
162 sdi->channel_groups = g_slist_append(sdi->channel_groups, cg);
163 }
164
165 sr_scpi_hw_info_free(hw_info);
166 hw_info = NULL;
167
168 scpi_cmd(sdi, devc->device->commands, SCPI_CMD_LOCAL);
169
170 return sdi;
171}
172
173static gchar *hpib_get_revision(struct sr_scpi_dev_inst *scpi)
174{
175 int ret;
176 gboolean matches;
177 char *response;
178 GRegex *version_regex;
179
180 ret = sr_scpi_get_string(scpi, "ROM?", &response);
181 if (ret != SR_OK && !response)
182 return NULL;
183
184 /* Example version string: "B01 B01" */
185 version_regex = g_regex_new("[A-Z][0-9]{2} [A-Z][0-9]{2}", 0, 0, NULL);
186 matches = g_regex_match(version_regex, response, 0, NULL);
187 g_regex_unref(version_regex);
188
189 if (!matches) {
190 /* Not a valid version string. Ignore it. */
191 g_free(response);
192 response = NULL;
193 } else {
194 /* Replace space with dot. */
195 response[3] = '.';
196 }
197
198 return response;
199}
200
201/*
202 * This function assumes the response is in the form "HP<model_number>"
203 *
204 * HP made many GPIB (then called HP-IB) instruments before the SCPI command
205 * set was introduced into the standard. We haven't seen any non-HP instruments
206 * which respond to the "ID?" query, so assume all are HP for now.
207 */
208static int hpib_get_hw_id(struct sr_scpi_dev_inst *scpi,
209 struct sr_scpi_hw_info **scpi_response)
210{
211 int ret;
212 char *response;
213 struct sr_scpi_hw_info *hw_info;
214
215 ret = sr_scpi_get_string(scpi, "ID?", &response);
216 if ((ret != SR_OK) || !response)
217 return SR_ERR;
218
219 hw_info = g_malloc0(sizeof(struct sr_scpi_hw_info));
220
221 *scpi_response = hw_info;
222 hw_info->model = response;
223 hw_info->firmware_version = hpib_get_revision(scpi);
224 hw_info->manufacturer = g_strdup("HP");
225
226 return SR_OK;
227}
228
229static struct sr_dev_inst *probe_scpi_pps_device(struct sr_scpi_dev_inst *scpi)
230{
231 return probe_device(scpi, sr_scpi_get_hw_id);
232}
233
234static struct sr_dev_inst *probe_hpib_pps_device(struct sr_scpi_dev_inst *scpi)
235{
236 return probe_device(scpi, hpib_get_hw_id);
237}
238
239static GSList *scan_scpi_pps(struct sr_dev_driver *di, GSList *options)
240{
241 return sr_scpi_scan(di->context, options, probe_scpi_pps_device);
242}
243
244static GSList *scan_hpib_pps(struct sr_dev_driver *di, GSList *options)
245{
246 return sr_scpi_scan(di->context, options, probe_hpib_pps_device);
247}
248
249static int dev_open(struct sr_dev_inst *sdi)
250{
251 struct dev_context *devc;
252 struct sr_scpi_dev_inst *scpi;
253 GVariant *beeper;
254
255 if (sdi->status != SR_ST_INACTIVE)
256 return SR_ERR;
257
258 scpi = sdi->conn;
259 if (sr_scpi_open(scpi) < 0)
260 return SR_ERR;
261
262 sdi->status = SR_ST_ACTIVE;
263
264 devc = sdi->priv;
265 scpi_cmd(sdi, devc->device->commands, SCPI_CMD_REMOTE);
266 devc->beeper_was_set = FALSE;
267 if (scpi_cmd_resp(sdi, devc->device->commands, &beeper,
268 G_VARIANT_TYPE_BOOLEAN, SCPI_CMD_BEEPER) == SR_OK) {
269 if (g_variant_get_boolean(beeper)) {
270 devc->beeper_was_set = TRUE;
271 scpi_cmd(sdi, devc->device->commands, SCPI_CMD_BEEPER_DISABLE);
272 }
273 g_variant_unref(beeper);
274 }
275
276 return SR_OK;
277}
278
279static int dev_close(struct sr_dev_inst *sdi)
280{
281 struct sr_scpi_dev_inst *scpi;
282 struct dev_context *devc;
283
284 if (sdi->status != SR_ST_ACTIVE)
285 return SR_ERR_DEV_CLOSED;
286
287 devc = sdi->priv;
288 scpi = sdi->conn;
289 if (scpi) {
290 if (devc->beeper_was_set)
291 scpi_cmd(sdi, devc->device->commands, SCPI_CMD_BEEPER_ENABLE);
292 scpi_cmd(sdi, devc->device->commands, SCPI_CMD_LOCAL);
293 sr_scpi_close(scpi);
294 sdi->status = SR_ST_INACTIVE;
295 }
296
297 return SR_OK;
298}
299
300static void clear_helper(void *priv)
301{
302 struct dev_context *devc;
303
304 devc = priv;
305 g_free(devc->channels);
306 g_free(devc->channel_groups);
307 g_free(devc);
308}
309
310static int dev_clear(const struct sr_dev_driver *di)
311{
312 return std_dev_clear(di, clear_helper);
313}
314
315static int config_get(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
316 const struct sr_channel_group *cg)
317{
318 struct dev_context *devc;
319 const GVariantType *gvtype;
320 unsigned int i;
321 int cmd, ret;
322 const char *s;
323
324 if (!sdi)
325 return SR_ERR_ARG;
326
327 devc = sdi->priv;
328
329 if (cg) {
330 /*
331 * These options only apply to channel groups with a single
332 * channel -- they're per-channel settings for the device.
333 */
334
335 /*
336 * Config keys are handled below depending on whether a channel
337 * group was provided by the frontend. However some of these
338 * take a CG on one PPS but not on others. Check the device's
339 * profile for that here, and NULL out the channel group as needed.
340 */
341 for (i = 0; i < devc->device->num_devopts; i++) {
342 if (devc->device->devopts[i] == key) {
343 cg = NULL;
344 break;
345 }
346 }
347 }
348
349 gvtype = NULL;
350 cmd = -1;
351 switch (key) {
352 case SR_CONF_ENABLED:
353 gvtype = G_VARIANT_TYPE_BOOLEAN;
354 cmd = SCPI_CMD_GET_OUTPUT_ENABLED;
355 break;
356 case SR_CONF_VOLTAGE:
357 gvtype = G_VARIANT_TYPE_DOUBLE;
358 cmd = SCPI_CMD_GET_MEAS_VOLTAGE;
359 break;
360 case SR_CONF_VOLTAGE_TARGET:
361 gvtype = G_VARIANT_TYPE_DOUBLE;
362 cmd = SCPI_CMD_GET_VOLTAGE_TARGET;
363 break;
364 case SR_CONF_OUTPUT_FREQUENCY:
365 gvtype = G_VARIANT_TYPE_DOUBLE;
366 cmd = SCPI_CMD_GET_MEAS_FREQUENCY;
367 break;
368 case SR_CONF_OUTPUT_FREQUENCY_TARGET:
369 gvtype = G_VARIANT_TYPE_DOUBLE;
370 cmd = SCPI_CMD_GET_FREQUENCY_TARGET;
371 break;
372 case SR_CONF_CURRENT:
373 gvtype = G_VARIANT_TYPE_DOUBLE;
374 cmd = SCPI_CMD_GET_MEAS_CURRENT;
375 break;
376 case SR_CONF_CURRENT_LIMIT:
377 gvtype = G_VARIANT_TYPE_DOUBLE;
378 cmd = SCPI_CMD_GET_CURRENT_LIMIT;
379 break;
380 case SR_CONF_OVER_VOLTAGE_PROTECTION_ENABLED:
381 gvtype = G_VARIANT_TYPE_BOOLEAN;
382 cmd = SCPI_CMD_GET_OVER_VOLTAGE_PROTECTION_ENABLED;
383 break;
384 case SR_CONF_OVER_VOLTAGE_PROTECTION_ACTIVE:
385 gvtype = G_VARIANT_TYPE_BOOLEAN;
386 cmd = SCPI_CMD_GET_OVER_VOLTAGE_PROTECTION_ACTIVE;
387 break;
388 case SR_CONF_OVER_VOLTAGE_PROTECTION_THRESHOLD:
389 gvtype = G_VARIANT_TYPE_DOUBLE;
390 cmd = SCPI_CMD_GET_OVER_VOLTAGE_PROTECTION_THRESHOLD;
391 break;
392 case SR_CONF_OVER_CURRENT_PROTECTION_ENABLED:
393 gvtype = G_VARIANT_TYPE_BOOLEAN;
394 cmd = SCPI_CMD_GET_OVER_CURRENT_PROTECTION_ENABLED;
395 break;
396 case SR_CONF_OVER_CURRENT_PROTECTION_ACTIVE:
397 gvtype = G_VARIANT_TYPE_BOOLEAN;
398 cmd = SCPI_CMD_GET_OVER_CURRENT_PROTECTION_ACTIVE;
399 break;
400 case SR_CONF_OVER_CURRENT_PROTECTION_THRESHOLD:
401 gvtype = G_VARIANT_TYPE_DOUBLE;
402 cmd = SCPI_CMD_GET_OVER_CURRENT_PROTECTION_THRESHOLD;
403 break;
404 case SR_CONF_OVER_TEMPERATURE_PROTECTION:
405 gvtype = G_VARIANT_TYPE_BOOLEAN;
406 cmd = SCPI_CMD_GET_OVER_TEMPERATURE_PROTECTION;
407 break;
408 case SR_CONF_REGULATION:
409 gvtype = G_VARIANT_TYPE_STRING;
410 cmd = SCPI_CMD_GET_OUTPUT_REGULATION;
411 }
412 if (!gvtype)
413 return SR_ERR_NA;
414
415 if (cg)
416 select_channel(sdi, cg->channels->data);
417 ret = scpi_cmd_resp(sdi, devc->device->commands, data, gvtype, cmd);
418
419 if (cmd == SCPI_CMD_GET_OUTPUT_REGULATION) {
420 /*
421 * The Rigol DP800 series return CV/CC/UR, Philips PM2800
422 * return VOLT/CURR. We always return a GVariant string in
423 * the Rigol notation.
424 */
425 s = g_variant_get_string(*data, NULL);
426 if (!strcmp(s, "VOLT")) {
427 g_variant_unref(*data);
428 *data = g_variant_new_string("CV");
429 } else if (!strcmp(s, "CURR")) {
430 g_variant_unref(*data);
431 *data = g_variant_new_string("CC");
432 }
433
434 s = g_variant_get_string(*data, NULL);
435 if (strcmp(s, "CV") && strcmp(s, "CC") && strcmp(s, "UR")) {
436 sr_dbg("Unknown response to SCPI_CMD_GET_OUTPUT_REGULATION: %s", s);
437 ret = SR_ERR_DATA;
438 }
439 }
440
441 return ret;
442}
443
444static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sdi,
445 const struct sr_channel_group *cg)
446{
447 struct dev_context *devc;
448 double d;
449 int ret;
450
451 if (!sdi)
452 return SR_ERR_ARG;
453
454 if (sdi->status != SR_ST_ACTIVE)
455 return SR_ERR_DEV_CLOSED;
456
457 if (cg)
458 /* Channel group specified. */
459 select_channel(sdi, cg->channels->data);
460
461 devc = sdi->priv;
462
463 switch (key) {
464 case SR_CONF_ENABLED:
465 if (g_variant_get_boolean(data))
466 ret = scpi_cmd(sdi, devc->device->commands,
467 SCPI_CMD_SET_OUTPUT_ENABLE);
468 else
469 ret = scpi_cmd(sdi, devc->device->commands,
470 SCPI_CMD_SET_OUTPUT_DISABLE);
471 break;
472 case SR_CONF_VOLTAGE_TARGET:
473 d = g_variant_get_double(data);
474 ret = scpi_cmd(sdi, devc->device->commands,
475 SCPI_CMD_SET_VOLTAGE_TARGET, d);
476 break;
477 case SR_CONF_OUTPUT_FREQUENCY_TARGET:
478 d = g_variant_get_double(data);
479 ret = scpi_cmd(sdi, devc->device->commands,
480 SCPI_CMD_SET_FREQUENCY_TARGET, d);
481 break;
482 case SR_CONF_CURRENT_LIMIT:
483 d = g_variant_get_double(data);
484 ret = scpi_cmd(sdi, devc->device->commands,
485 SCPI_CMD_SET_CURRENT_LIMIT, d);
486 break;
487 case SR_CONF_OVER_VOLTAGE_PROTECTION_ENABLED:
488 if (g_variant_get_boolean(data))
489 ret = scpi_cmd(sdi, devc->device->commands,
490 SCPI_CMD_SET_OVER_VOLTAGE_PROTECTION_ENABLE);
491 else
492 ret = scpi_cmd(sdi, devc->device->commands,
493 SCPI_CMD_SET_OVER_VOLTAGE_PROTECTION_DISABLE);
494 break;
495 case SR_CONF_OVER_VOLTAGE_PROTECTION_THRESHOLD:
496 d = g_variant_get_double(data);
497 ret = scpi_cmd(sdi, devc->device->commands,
498 SCPI_CMD_SET_OVER_VOLTAGE_PROTECTION_THRESHOLD, d);
499 break;
500 case SR_CONF_OVER_CURRENT_PROTECTION_ENABLED:
501 if (g_variant_get_boolean(data))
502 ret = scpi_cmd(sdi, devc->device->commands,
503 SCPI_CMD_SET_OVER_CURRENT_PROTECTION_ENABLE);
504 else
505 ret = scpi_cmd(sdi, devc->device->commands,
506 SCPI_CMD_SET_OVER_CURRENT_PROTECTION_DISABLE);
507 break;
508 case SR_CONF_OVER_CURRENT_PROTECTION_THRESHOLD:
509 d = g_variant_get_double(data);
510 ret = scpi_cmd(sdi, devc->device->commands,
511 SCPI_CMD_SET_OVER_CURRENT_PROTECTION_THRESHOLD, d);
512 break;
513 case SR_CONF_OVER_TEMPERATURE_PROTECTION:
514 if (g_variant_get_boolean(data))
515 ret = scpi_cmd(sdi, devc->device->commands,
516 SCPI_CMD_SET_OVER_TEMPERATURE_PROTECTION_ENABLE);
517 else
518 ret = scpi_cmd(sdi, devc->device->commands,
519 SCPI_CMD_SET_OVER_TEMPERATURE_PROTECTION_DISABLE);
520 break;
521 default:
522 ret = SR_ERR_NA;
523 }
524
525 return ret;
526}
527
528static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
529 const struct sr_channel_group *cg)
530{
531 struct dev_context *devc;
532 struct sr_channel *ch;
533 const struct channel_spec *ch_spec;
534 GVariant *gvar;
535 GVariantBuilder gvb;
536 int ret, i;
537 const char *s[16];
538
539 /* Always available, even without sdi. */
540 if (key == SR_CONF_SCAN_OPTIONS) {
541 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
542 scanopts, ARRAY_SIZE(scanopts), sizeof(uint32_t));
543 return SR_OK;
544 } else if (key == SR_CONF_DEVICE_OPTIONS && !sdi) {
545 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
546 drvopts, ARRAY_SIZE(drvopts), sizeof(uint32_t));
547 return SR_OK;
548 }
549
550 if (!sdi)
551 return SR_ERR_ARG;
552 devc = sdi->priv;
553
554 ret = SR_OK;
555 if (!cg) {
556 /* No channel group: global options. */
557 switch (key) {
558 case SR_CONF_DEVICE_OPTIONS:
559 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
560 devc->device->devopts, devc->device->num_devopts,
561 sizeof(uint32_t));
562 break;
563 case SR_CONF_CHANNEL_CONFIG:
564 /* Not used. */
565 i = 0;
566 if (devc->device->features & PPS_INDEPENDENT)
567 s[i++] = "Independent";
568 if (devc->device->features & PPS_SERIES)
569 s[i++] = "Series";
570 if (devc->device->features & PPS_PARALLEL)
571 s[i++] = "Parallel";
572 if (i == 0) {
573 /*
574 * Shouldn't happen: independent-only devices
575 * shouldn't advertise this option at all.
576 */
577 return SR_ERR_NA;
578 }
579 *data = g_variant_new_strv(s, i);
580 break;
581 default:
582 return SR_ERR_NA;
583 }
584 } else {
585 /* Channel group specified. */
586 /*
587 * Per-channel-group options depending on a channel are actually
588 * done with the first channel. Channel groups in PPS can have
589 * more than one channel, but they will typically be of equal
590 * specification for use in series or parallel mode.
591 */
592 ch = cg->channels->data;
593
594 switch (key) {
595 case SR_CONF_DEVICE_OPTIONS:
596 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
597 devc->device->devopts_cg, devc->device->num_devopts_cg,
598 sizeof(uint32_t));
599 break;
600 case SR_CONF_VOLTAGE_TARGET:
601 ch_spec = &(devc->device->channels[ch->index]);
602 g_variant_builder_init(&gvb, G_VARIANT_TYPE_ARRAY);
603 /* Min, max, write resolution. */
604 for (i = 0; i < 3; i++) {
605 gvar = g_variant_new_double(ch_spec->voltage[i]);
606 g_variant_builder_add_value(&gvb, gvar);
607 }
608 *data = g_variant_builder_end(&gvb);
609 break;
610 case SR_CONF_OUTPUT_FREQUENCY_TARGET:
611 ch_spec = &(devc->device->channels[ch->index]);
612 g_variant_builder_init(&gvb, G_VARIANT_TYPE_ARRAY);
613 /* Min, max, write resolution. */
614 for (i = 0; i < 3; i++) {
615 gvar = g_variant_new_double(ch_spec->frequency[i]);
616 g_variant_builder_add_value(&gvb, gvar);
617 }
618 *data = g_variant_builder_end(&gvb);
619 break;
620 case SR_CONF_CURRENT_LIMIT:
621 g_variant_builder_init(&gvb, G_VARIANT_TYPE_ARRAY);
622 /* Min, max, step. */
623 for (i = 0; i < 3; i++) {
624 ch_spec = &(devc->device->channels[ch->index]);
625 gvar = g_variant_new_double(ch_spec->current[i]);
626 g_variant_builder_add_value(&gvb, gvar);
627 }
628 *data = g_variant_builder_end(&gvb);
629 break;
630 default:
631 return SR_ERR_NA;
632 }
633 }
634
635 return ret;
636}
637
638static int dev_acquisition_start(const struct sr_dev_inst *sdi)
639{
640 struct dev_context *devc;
641 struct sr_scpi_dev_inst *scpi;
642 struct sr_channel *ch;
643 struct pps_channel *pch;
644 int cmd, ret;
645
646 if (sdi->status != SR_ST_ACTIVE)
647 return SR_ERR_DEV_CLOSED;
648
649 devc = sdi->priv;
650 scpi = sdi->conn;
651
652 if ((ret = sr_scpi_source_add(sdi->session, scpi, G_IO_IN, 10,
653 scpi_pps_receive_data, (void *)sdi)) != SR_OK)
654 return ret;
655 std_session_send_df_header(sdi, LOG_PREFIX);
656
657 /* Prime the pipe with the first channel's fetch. */
658 ch = sr_next_enabled_channel(sdi, NULL);
659 pch = ch->priv;
660 if ((ret = select_channel(sdi, ch)) < 0)
661 return ret;
662 if (pch->mq == SR_MQ_VOLTAGE)
663 cmd = SCPI_CMD_GET_MEAS_VOLTAGE;
664 else if (pch->mq == SR_MQ_FREQUENCY)
665 cmd = SCPI_CMD_GET_MEAS_FREQUENCY;
666 else if (pch->mq == SR_MQ_CURRENT)
667 cmd = SCPI_CMD_GET_MEAS_CURRENT;
668 else if (pch->mq == SR_MQ_POWER)
669 cmd = SCPI_CMD_GET_MEAS_POWER;
670 else
671 return SR_ERR;
672 scpi_cmd(sdi, devc->device->commands, cmd, pch->hwname);
673
674 return SR_OK;
675}
676
677static int dev_acquisition_stop(struct sr_dev_inst *sdi)
678{
679 struct sr_scpi_dev_inst *scpi;
680 float f;
681
682 if (sdi->status != SR_ST_ACTIVE)
683 return SR_ERR_DEV_CLOSED;
684
685 scpi = sdi->conn;
686
687 /*
688 * A requested value is certainly on the way. Retrieve it now,
689 * to avoid leaving the device in a state where it's not expecting
690 * commands.
691 */
692 sr_scpi_get_float(scpi, NULL, &f);
693 sr_scpi_source_remove(sdi->session, scpi);
694
695 std_session_send_df_end(sdi, LOG_PREFIX);
696
697 return SR_OK;
698}
699
700static struct sr_dev_driver scpi_pps_driver_info = {
701 .name = "scpi-pps",
702 .longname = "SCPI PPS",
703 .api_version = 1,
704 .init = std_init,
705 .cleanup = std_cleanup,
706 .scan = scan_scpi_pps,
707 .dev_list = std_dev_list,
708 .dev_clear = dev_clear,
709 .config_get = config_get,
710 .config_set = config_set,
711 .config_list = config_list,
712 .dev_open = dev_open,
713 .dev_close = dev_close,
714 .dev_acquisition_start = dev_acquisition_start,
715 .dev_acquisition_stop = dev_acquisition_stop,
716 .context = NULL,
717};
718
719static struct sr_dev_driver hp_ib_pps_driver_info = {
720 .name = "hpib-pps",
721 .longname = "HP-IB PPS",
722 .api_version = 1,
723 .init = std_init,
724 .cleanup = std_cleanup,
725 .scan = scan_hpib_pps,
726 .dev_list = std_dev_list,
727 .dev_clear = dev_clear,
728 .config_get = config_get,
729 .config_set = config_set,
730 .config_list = config_list,
731 .dev_open = dev_open,
732 .dev_close = dev_close,
733 .dev_acquisition_start = dev_acquisition_start,
734 .dev_acquisition_stop = dev_acquisition_stop,
735 .context = NULL,
736};
737SR_REGISTER_DEV_DRIVER(scpi_pps_driver_info);
738SR_REGISTER_DEV_DRIVER(hp_ib_pps_driver_info);
Hardware access and backend lib