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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 <string.h> | |
21 | #include "protocol.h" | |
22 | ||
23 | SR_PRIV struct sr_dev_driver scpi_pps_driver_info; | |
24 | extern unsigned int num_pps_profiles; | |
25 | extern const struct scpi_pps pps_profiles[]; | |
26 | ||
27 | static const uint32_t scanopts[] = { | |
28 | SR_CONF_CONN, | |
29 | SR_CONF_SERIALCOMM, | |
30 | }; | |
31 | ||
32 | static const uint32_t drvopts[] = { | |
33 | SR_CONF_POWER_SUPPLY, | |
34 | }; | |
35 | ||
36 | static struct pps_channel_instance pci[] = { | |
37 | { SR_MQ_VOLTAGE, SCPI_CMD_GET_MEAS_VOLTAGE, "V" }, | |
38 | { SR_MQ_CURRENT, SCPI_CMD_GET_MEAS_CURRENT, "I" }, | |
39 | { SR_MQ_POWER, SCPI_CMD_GET_MEAS_POWER, "P" }, | |
40 | }; | |
41 | ||
42 | static int init(struct sr_dev_driver *di, struct sr_context *sr_ctx) | |
43 | { | |
44 | return std_init(sr_ctx, di, LOG_PREFIX); | |
45 | } | |
46 | ||
47 | static struct sr_dev_inst *probe_device(struct sr_scpi_dev_inst *scpi) | |
48 | { | |
49 | struct dev_context *devc; | |
50 | struct sr_dev_inst *sdi; | |
51 | struct sr_scpi_hw_info *hw_info; | |
52 | struct sr_channel_group *cg; | |
53 | struct sr_channel *ch; | |
54 | const struct scpi_pps *device; | |
55 | struct pps_channel *pch; | |
56 | struct channel_spec *channels; | |
57 | struct channel_group_spec *channel_groups, *cgs; | |
58 | struct pps_channel_group *pcg; | |
59 | GRegex *model_re; | |
60 | GMatchInfo *model_mi; | |
61 | GSList *l; | |
62 | uint64_t mask; | |
63 | unsigned int num_channels, num_channel_groups, ch_num, ch_idx, i, j; | |
64 | int ret; | |
65 | const char *vendor; | |
66 | char ch_name[16]; | |
67 | ||
68 | if (sr_scpi_get_hw_id(scpi, &hw_info) != SR_OK) { | |
69 | sr_info("Couldn't get IDN response."); | |
70 | return NULL; | |
71 | } | |
72 | ||
73 | device = NULL; | |
74 | for (i = 0; i < num_pps_profiles; i++) { | |
75 | vendor = get_vendor(hw_info->manufacturer); | |
76 | if (strcasecmp(vendor, pps_profiles[i].vendor)) | |
77 | continue; | |
78 | model_re = g_regex_new(pps_profiles[i].model, 0, 0, NULL); | |
79 | if (g_regex_match(model_re, hw_info->model, 0, &model_mi)) | |
80 | device = &pps_profiles[i]; | |
81 | g_match_info_unref(model_mi); | |
82 | g_regex_unref(model_re); | |
83 | if (device) | |
84 | break; | |
85 | } | |
86 | if (!device) { | |
87 | sr_scpi_hw_info_free(hw_info); | |
88 | return NULL; | |
89 | } | |
90 | ||
91 | sdi = g_malloc0(sizeof(struct sr_dev_inst)); | |
92 | sdi->status = SR_ST_INACTIVE; | |
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 = device->channels; | |
108 | num_channels = device->num_channels; | |
109 | channel_groups = 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(sdi, 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, SCPI_CMD_LOCAL); | |
169 | sr_scpi_close(scpi); | |
170 | ||
171 | return sdi; | |
172 | } | |
173 | ||
174 | static GSList *scan(struct sr_dev_driver *di, GSList *options) | |
175 | { | |
176 | return sr_scpi_scan(di->priv, options, probe_device); | |
177 | } | |
178 | ||
179 | static GSList *dev_list(const struct sr_dev_driver *di) | |
180 | { | |
181 | return ((struct drv_context *)(di->priv))->instances; | |
182 | } | |
183 | ||
184 | static int dev_clear(const struct sr_dev_driver *di) | |
185 | { | |
186 | return std_dev_clear(di, NULL); | |
187 | } | |
188 | ||
189 | static int dev_open(struct sr_dev_inst *sdi) | |
190 | { | |
191 | struct dev_context *devc; | |
192 | struct sr_scpi_dev_inst *scpi; | |
193 | GVariant *beeper; | |
194 | ||
195 | if (sdi->status != SR_ST_INACTIVE) | |
196 | return SR_ERR; | |
197 | ||
198 | scpi = sdi->conn; | |
199 | if (sr_scpi_open(scpi) < 0) | |
200 | return SR_ERR; | |
201 | ||
202 | sdi->status = SR_ST_ACTIVE; | |
203 | ||
204 | scpi_cmd(sdi, SCPI_CMD_REMOTE); | |
205 | devc = sdi->priv; | |
206 | devc->beeper_was_set = FALSE; | |
207 | if (scpi_cmd_resp(sdi, &beeper, G_VARIANT_TYPE_BOOLEAN, SCPI_CMD_BEEPER) == SR_OK) { | |
208 | if (g_variant_get_boolean(beeper)) { | |
209 | devc->beeper_was_set = TRUE; | |
210 | scpi_cmd(sdi, SCPI_CMD_BEEPER_DISABLE); | |
211 | } | |
212 | g_variant_unref(beeper); | |
213 | } | |
214 | ||
215 | return SR_OK; | |
216 | } | |
217 | ||
218 | static int dev_close(struct sr_dev_inst *sdi) | |
219 | { | |
220 | struct sr_scpi_dev_inst *scpi; | |
221 | struct dev_context *devc; | |
222 | ||
223 | if (sdi->status != SR_ST_ACTIVE) | |
224 | return SR_ERR_DEV_CLOSED; | |
225 | ||
226 | devc = sdi->priv; | |
227 | scpi = sdi->conn; | |
228 | if (scpi) { | |
229 | if (devc->beeper_was_set) | |
230 | scpi_cmd(sdi, SCPI_CMD_BEEPER_ENABLE); | |
231 | scpi_cmd(sdi, SCPI_CMD_LOCAL); | |
232 | sr_scpi_close(scpi); | |
233 | sdi->status = SR_ST_INACTIVE; | |
234 | } | |
235 | ||
236 | return SR_OK; | |
237 | } | |
238 | ||
239 | static void clear_helper(void *priv) | |
240 | { | |
241 | struct dev_context *devc; | |
242 | ||
243 | devc = priv; | |
244 | g_free(devc->channels); | |
245 | g_free(devc->channel_groups); | |
246 | g_free(devc); | |
247 | } | |
248 | ||
249 | static int cleanup(const struct sr_dev_driver *di) | |
250 | { | |
251 | return std_dev_clear(di, clear_helper); | |
252 | } | |
253 | ||
254 | static int config_get(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi, | |
255 | const struct sr_channel_group *cg) | |
256 | { | |
257 | struct dev_context *devc; | |
258 | const GVariantType *gvtype; | |
259 | unsigned int i; | |
260 | int cmd, ret; | |
261 | ||
262 | if (!sdi) | |
263 | return SR_ERR_ARG; | |
264 | ||
265 | devc = sdi->priv; | |
266 | ||
267 | if (cg) { | |
268 | /* | |
269 | * These options only apply to channel groups with a single | |
270 | * channel -- they're per-channel settings for the device. | |
271 | */ | |
272 | ||
273 | /* | |
274 | * Config keys are handled below depending on whether a channel | |
275 | * group was provided by the frontend. However some of these | |
276 | * take a CG on one PPS but not on others. Check the device's | |
277 | * profile for that here, and NULL out the channel group as needed. | |
278 | */ | |
279 | for (i = 0; i < devc->device->num_devopts; i++) { | |
280 | if (devc->device->devopts[i] == key) { | |
281 | cg = NULL; | |
282 | break; | |
283 | } | |
284 | } | |
285 | } | |
286 | ||
287 | gvtype = NULL; | |
288 | cmd = -1; | |
289 | switch (key) { | |
290 | case SR_CONF_OUTPUT_ENABLED: | |
291 | gvtype = G_VARIANT_TYPE_BOOLEAN; | |
292 | cmd = SCPI_CMD_GET_OUTPUT_ENABLED; | |
293 | break; | |
294 | case SR_CONF_OUTPUT_VOLTAGE: | |
295 | gvtype = G_VARIANT_TYPE_DOUBLE; | |
296 | cmd = SCPI_CMD_GET_MEAS_VOLTAGE; | |
297 | break; | |
298 | case SR_CONF_OUTPUT_VOLTAGE_TARGET: | |
299 | gvtype = G_VARIANT_TYPE_DOUBLE; | |
300 | cmd = SCPI_CMD_GET_VOLTAGE_TARGET; | |
301 | break; | |
302 | case SR_CONF_OUTPUT_CURRENT: | |
303 | gvtype = G_VARIANT_TYPE_DOUBLE; | |
304 | cmd = SCPI_CMD_GET_MEAS_CURRENT; | |
305 | break; | |
306 | case SR_CONF_OUTPUT_CURRENT_LIMIT: | |
307 | gvtype = G_VARIANT_TYPE_DOUBLE; | |
308 | cmd = SCPI_CMD_GET_CURRENT_LIMIT; | |
309 | break; | |
310 | case SR_CONF_OVER_VOLTAGE_PROTECTION_ENABLED: | |
311 | gvtype = G_VARIANT_TYPE_BOOLEAN; | |
312 | cmd = SCPI_CMD_GET_OVER_VOLTAGE_PROTECTION_ENABLED; | |
313 | break; | |
314 | case SR_CONF_OVER_VOLTAGE_PROTECTION_ACTIVE: | |
315 | gvtype = G_VARIANT_TYPE_BOOLEAN; | |
316 | cmd = SCPI_CMD_GET_OVER_VOLTAGE_PROTECTION_ACTIVE; | |
317 | break; | |
318 | case SR_CONF_OVER_VOLTAGE_PROTECTION_THRESHOLD: | |
319 | gvtype = G_VARIANT_TYPE_DOUBLE; | |
320 | cmd = SCPI_CMD_GET_OVER_VOLTAGE_PROTECTION_THRESHOLD; | |
321 | break; | |
322 | case SR_CONF_OVER_CURRENT_PROTECTION_ENABLED: | |
323 | gvtype = G_VARIANT_TYPE_BOOLEAN; | |
324 | cmd = SCPI_CMD_GET_OVER_CURRENT_PROTECTION_ENABLED; | |
325 | break; | |
326 | case SR_CONF_OVER_CURRENT_PROTECTION_ACTIVE: | |
327 | gvtype = G_VARIANT_TYPE_BOOLEAN; | |
328 | cmd = SCPI_CMD_GET_OVER_CURRENT_PROTECTION_ACTIVE; | |
329 | break; | |
330 | case SR_CONF_OVER_CURRENT_PROTECTION_THRESHOLD: | |
331 | gvtype = G_VARIANT_TYPE_DOUBLE; | |
332 | cmd = SCPI_CMD_GET_OVER_CURRENT_PROTECTION_THRESHOLD; | |
333 | break; | |
334 | case SR_CONF_OVER_TEMPERATURE_PROTECTION: | |
335 | gvtype = G_VARIANT_TYPE_BOOLEAN; | |
336 | cmd = SCPI_CMD_GET_OVER_TEMPERATURE_PROTECTION; | |
337 | break; | |
338 | case SR_CONF_OUTPUT_REGULATION: | |
339 | gvtype = G_VARIANT_TYPE_STRING; | |
340 | cmd = SCPI_CMD_GET_OUTPUT_REGULATION; | |
341 | } | |
342 | if (gvtype) { | |
343 | if (cg) | |
344 | select_channel(sdi, cg->channels->data); | |
345 | ret = scpi_cmd_resp(sdi, data, gvtype, cmd); | |
346 | } else | |
347 | ret = SR_ERR_NA; | |
348 | ||
349 | return ret; | |
350 | } | |
351 | ||
352 | static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sdi, | |
353 | const struct sr_channel_group *cg) | |
354 | { | |
355 | double d; | |
356 | int ret; | |
357 | ||
358 | if (!sdi) | |
359 | return SR_ERR_ARG; | |
360 | ||
361 | if (sdi->status != SR_ST_ACTIVE) | |
362 | return SR_ERR_DEV_CLOSED; | |
363 | ||
364 | if (cg) | |
365 | /* Channel group specified. */ | |
366 | select_channel(sdi, cg->channels->data); | |
367 | ||
368 | ret = SR_OK; | |
369 | switch (key) { | |
370 | case SR_CONF_OUTPUT_ENABLED: | |
371 | if (g_variant_get_boolean(data)) | |
372 | ret = scpi_cmd(sdi, SCPI_CMD_SET_OUTPUT_ENABLE); | |
373 | else | |
374 | ret = scpi_cmd(sdi, SCPI_CMD_SET_OUTPUT_DISABLE); | |
375 | break; | |
376 | case SR_CONF_OUTPUT_VOLTAGE_TARGET: | |
377 | d = g_variant_get_double(data); | |
378 | ret = scpi_cmd(sdi, SCPI_CMD_SET_VOLTAGE_TARGET, d); | |
379 | break; | |
380 | case SR_CONF_OUTPUT_CURRENT_LIMIT: | |
381 | d = g_variant_get_double(data); | |
382 | ret = scpi_cmd(sdi, SCPI_CMD_SET_CURRENT_LIMIT, d); | |
383 | break; | |
384 | case SR_CONF_OVER_VOLTAGE_PROTECTION_ENABLED: | |
385 | if (g_variant_get_boolean(data)) | |
386 | ret = scpi_cmd(sdi, SCPI_CMD_SET_OVER_VOLTAGE_PROTECTION_ENABLE); | |
387 | else | |
388 | ret = scpi_cmd(sdi, SCPI_CMD_SET_OVER_VOLTAGE_PROTECTION_DISABLE); | |
389 | break; | |
390 | case SR_CONF_OVER_VOLTAGE_PROTECTION_THRESHOLD: | |
391 | d = g_variant_get_double(data); | |
392 | ret = scpi_cmd(sdi, SCPI_CMD_SET_OVER_VOLTAGE_PROTECTION_THRESHOLD, d); | |
393 | break; | |
394 | case SR_CONF_OVER_CURRENT_PROTECTION_ENABLED: | |
395 | if (g_variant_get_boolean(data)) | |
396 | ret = scpi_cmd(sdi, SCPI_CMD_SET_OVER_CURRENT_PROTECTION_ENABLE); | |
397 | else | |
398 | ret = scpi_cmd(sdi, SCPI_CMD_SET_OVER_CURRENT_PROTECTION_DISABLE); | |
399 | break; | |
400 | case SR_CONF_OVER_CURRENT_PROTECTION_THRESHOLD: | |
401 | d = g_variant_get_double(data); | |
402 | ret = scpi_cmd(sdi, SCPI_CMD_SET_OVER_CURRENT_PROTECTION_THRESHOLD, d); | |
403 | break; | |
404 | case SR_CONF_OVER_TEMPERATURE_PROTECTION: | |
405 | if (g_variant_get_boolean(data)) | |
406 | ret = scpi_cmd(sdi, SCPI_CMD_SET_OVER_TEMPERATURE_PROTECTION_ENABLE); | |
407 | else | |
408 | ret = scpi_cmd(sdi, SCPI_CMD_SET_OVER_TEMPERATURE_PROTECTION_DISABLE); | |
409 | break; | |
410 | default: | |
411 | ret = SR_ERR_NA; | |
412 | } | |
413 | ||
414 | return ret; | |
415 | } | |
416 | ||
417 | static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi, | |
418 | const struct sr_channel_group *cg) | |
419 | { | |
420 | struct dev_context *devc; | |
421 | struct sr_channel *ch; | |
422 | struct channel_spec *ch_spec; | |
423 | GVariant *gvar; | |
424 | GVariantBuilder gvb; | |
425 | int ret, i; | |
426 | const char *s[16]; | |
427 | ||
428 | /* Always available, even without sdi. */ | |
429 | if (key == SR_CONF_SCAN_OPTIONS) { | |
430 | *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32, | |
431 | scanopts, ARRAY_SIZE(scanopts), sizeof(uint32_t)); | |
432 | return SR_OK; | |
433 | } else if (key == SR_CONF_DEVICE_OPTIONS && !sdi) { | |
434 | *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32, | |
435 | drvopts, ARRAY_SIZE(drvopts), sizeof(uint32_t)); | |
436 | return SR_OK; | |
437 | } | |
438 | ||
439 | if (!sdi) | |
440 | return SR_ERR_ARG; | |
441 | devc = sdi->priv; | |
442 | ||
443 | ret = SR_OK; | |
444 | if (!cg) { | |
445 | /* No channel group: global options. */ | |
446 | switch (key) { | |
447 | case SR_CONF_DEVICE_OPTIONS: | |
448 | *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32, | |
449 | devc->device->devopts, devc->device->num_devopts, | |
450 | sizeof(uint32_t)); | |
451 | break; | |
452 | case SR_CONF_OUTPUT_CHANNEL_CONFIG: | |
453 | /* Not used. */ | |
454 | i = 0; | |
455 | if (devc->device->features & PPS_INDEPENDENT) | |
456 | s[i++] = "Independent"; | |
457 | if (devc->device->features & PPS_SERIES) | |
458 | s[i++] = "Series"; | |
459 | if (devc->device->features & PPS_PARALLEL) | |
460 | s[i++] = "Parallel"; | |
461 | if (i == 0) { | |
462 | /* | |
463 | * Shouldn't happen: independent-only devices | |
464 | * shouldn't advertise this option at all. | |
465 | */ | |
466 | return SR_ERR_NA; | |
467 | } | |
468 | *data = g_variant_new_strv(s, i); | |
469 | break; | |
470 | default: | |
471 | return SR_ERR_NA; | |
472 | } | |
473 | } else { | |
474 | /* Channel group specified. */ | |
475 | /* | |
476 | * Per-channel-group options depending on a channel are actually | |
477 | * done with the first channel. Channel groups in PPS can have | |
478 | * more than one channel, but they will typically be of equal | |
479 | * specification for use in series or parallel mode. | |
480 | */ | |
481 | ch = cg->channels->data; | |
482 | ||
483 | switch (key) { | |
484 | case SR_CONF_DEVICE_OPTIONS: | |
485 | *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32, | |
486 | devc->device->devopts_cg, devc->device->num_devopts_cg, | |
487 | sizeof(uint32_t)); | |
488 | break; | |
489 | case SR_CONF_OUTPUT_VOLTAGE_TARGET: | |
490 | ch_spec = &(devc->device->channels[ch->index]); | |
491 | g_variant_builder_init(&gvb, G_VARIANT_TYPE_ARRAY); | |
492 | /* Min, max, write resolution. */ | |
493 | for (i = 0; i < 3; i++) { | |
494 | gvar = g_variant_new_double(ch_spec->voltage[i]); | |
495 | g_variant_builder_add_value(&gvb, gvar); | |
496 | } | |
497 | *data = g_variant_builder_end(&gvb); | |
498 | break; | |
499 | case SR_CONF_OUTPUT_CURRENT_LIMIT: | |
500 | g_variant_builder_init(&gvb, G_VARIANT_TYPE_ARRAY); | |
501 | /* Min, max, step. */ | |
502 | for (i = 0; i < 3; i++) { | |
503 | ch_spec = &(devc->device->channels[ch->index]); | |
504 | gvar = g_variant_new_double(ch_spec->current[i]); | |
505 | g_variant_builder_add_value(&gvb, gvar); | |
506 | } | |
507 | *data = g_variant_builder_end(&gvb); | |
508 | break; | |
509 | default: | |
510 | return SR_ERR_NA; | |
511 | } | |
512 | } | |
513 | ||
514 | return ret; | |
515 | } | |
516 | ||
517 | static int dev_acquisition_start(const struct sr_dev_inst *sdi, | |
518 | void *cb_data) | |
519 | { | |
520 | struct dev_context *devc; | |
521 | struct sr_scpi_dev_inst *scpi; | |
522 | struct sr_channel *ch; | |
523 | struct pps_channel *pch; | |
524 | int cmd, ret; | |
525 | ||
526 | if (sdi->status != SR_ST_ACTIVE) | |
527 | return SR_ERR_DEV_CLOSED; | |
528 | ||
529 | devc = sdi->priv; | |
530 | scpi = sdi->conn; | |
531 | devc->cb_data = cb_data; | |
532 | ||
533 | if ((ret = sr_scpi_source_add(sdi->session, scpi, G_IO_IN, 10, | |
534 | scpi_pps_receive_data, (void *)sdi)) != SR_OK) | |
535 | return ret; | |
536 | std_session_send_df_header(sdi, LOG_PREFIX); | |
537 | ||
538 | /* Prime the pipe with the first channel's fetch. */ | |
539 | ch = next_enabled_channel(sdi, NULL); | |
540 | pch = ch->priv; | |
541 | if ((ret = select_channel(sdi, ch)) != SR_OK) | |
542 | return ret; | |
543 | if (pch->mq == SR_MQ_VOLTAGE) | |
544 | cmd = SCPI_CMD_GET_MEAS_VOLTAGE; | |
545 | else if (pch->mq == SR_MQ_CURRENT) | |
546 | cmd = SCPI_CMD_GET_MEAS_CURRENT; | |
547 | else if (pch->mq == SR_MQ_POWER) | |
548 | cmd = SCPI_CMD_GET_MEAS_POWER; | |
549 | else | |
550 | return SR_ERR; | |
551 | scpi_cmd(sdi, cmd, pch->hwname); | |
552 | ||
553 | return SR_OK; | |
554 | } | |
555 | ||
556 | static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data) | |
557 | { | |
558 | struct sr_datafeed_packet packet; | |
559 | struct sr_scpi_dev_inst *scpi; | |
560 | float f; | |
561 | ||
562 | (void)cb_data; | |
563 | ||
564 | if (sdi->status != SR_ST_ACTIVE) | |
565 | return SR_ERR_DEV_CLOSED; | |
566 | ||
567 | scpi = sdi->conn; | |
568 | ||
569 | /* | |
570 | * A requested value is certainly on the way. Retrieve it now, | |
571 | * to avoid leaving the device in a state where it's not expecting | |
572 | * commands. | |
573 | */ | |
574 | sr_scpi_get_float(scpi, NULL, &f); | |
575 | sr_scpi_source_remove(sdi->session, scpi); | |
576 | ||
577 | packet.type = SR_DF_END; | |
578 | sr_session_send(sdi, &packet); | |
579 | ||
580 | return SR_OK; | |
581 | } | |
582 | ||
583 | SR_PRIV struct sr_dev_driver scpi_pps_driver_info = { | |
584 | .name = "scpi-pps", | |
585 | .longname = "SCPI PPS", | |
586 | .api_version = 1, | |
587 | .init = init, | |
588 | .cleanup = cleanup, | |
589 | .scan = scan, | |
590 | .dev_list = dev_list, | |
591 | .dev_clear = dev_clear, | |
592 | .config_get = config_get, | |
593 | .config_set = config_set, | |
594 | .config_list = config_list, | |
595 | .dev_open = dev_open, | |
596 | .dev_close = dev_close, | |
597 | .dev_acquisition_start = dev_acquisition_start, | |
598 | .dev_acquisition_stop = dev_acquisition_stop, | |
599 | .priv = NULL, | |
600 | }; |