src/hardware/demo/api.c

   1 /*
   2  * This file is part of the libsigrok project.
   3  *
   4  * Copyright (C) 2010 Uwe Hermann <uwe@hermann-uwe.de>
   5  * Copyright (C) 2011 Olivier Fauchon <olivier@aixmarseille.com>
   6  * Copyright (C) 2012 Alexandru Gagniuc <mr.nuke.me@gmail.com>
   7  * Copyright (C) 2015 Bartosz Golaszewski <bgolaszewski@baylibre.com>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, see <http://www.gnu.org/licenses/>.
  21  */
  22
  23 #include <config.h>
  24 #include <stdlib.h>
  25 #include <string.h>
  26 #include <math.h>
  27 #include <libsigrok/libsigrok.h>
  28 #include "libsigrok-internal.h"
  29 #include "protocol.h"
  30
  31 #define DEFAULT_NUM_LOGIC_CHANNELS              8
  32 #define DEFAULT_LOGIC_PATTERN                   PATTERN_SIGROK
  33
  34 #define DEFAULT_NUM_ANALOG_CHANNELS             4
  35 #define DEFAULT_ANALOG_ENCODING_DIGITS  4
  36 #define DEFAULT_ANALOG_SPEC_DIGITS              4
  37 #define DEFAULT_ANALOG_AMPLITUDE                10
  38
  39 /* Note: No spaces allowed because of sigrok-cli. */
  40 static const char *logic_pattern_str[] = {
  41         "sigrok",
  42         "random",
  43         "incremental",
  44         "walking-one",
  45         "walking-zero",
  46         "all-low",
  47         "all-high",
  48         "squid",
  49         "graycode",
  50 };
  51
  52 static const uint32_t scanopts[] = {
  53         SR_CONF_NUM_LOGIC_CHANNELS,
  54         SR_CONF_NUM_ANALOG_CHANNELS,
  55         SR_CONF_LIMIT_FRAMES,
  56 };
  57
  58 static const uint32_t drvopts[] = {
  59         SR_CONF_DEMO_DEV,
  60         SR_CONF_LOGIC_ANALYZER,
  61         SR_CONF_OSCILLOSCOPE,
  62 };
  63
  64 static const uint32_t devopts[] = {
  65         SR_CONF_CONTINUOUS,
  66         SR_CONF_LIMIT_SAMPLES | SR_CONF_GET | SR_CONF_SET,
  67         SR_CONF_LIMIT_MSEC | SR_CONF_GET | SR_CONF_SET,
  68         SR_CONF_LIMIT_FRAMES | SR_CONF_GET | SR_CONF_SET,
  69         SR_CONF_SAMPLERATE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  70         SR_CONF_AVERAGING | SR_CONF_GET | SR_CONF_SET,
  71         SR_CONF_AVG_SAMPLES | SR_CONF_GET | SR_CONF_SET,
  72         SR_CONF_TRIGGER_MATCH | SR_CONF_LIST,
  73         SR_CONF_CAPTURE_RATIO | SR_CONF_GET | SR_CONF_SET,
  74 };
  75
  76 static const uint32_t devopts_cg_logic[] = {
  77         SR_CONF_PATTERN_MODE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  78 };
  79
  80 static const uint32_t devopts_cg_analog_group[] = {
  81         SR_CONF_AMPLITUDE | SR_CONF_GET | SR_CONF_SET,
  82 };
  83
  84 static const uint32_t devopts_cg_analog_channel[] = {
  85         SR_CONF_PATTERN_MODE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  86         SR_CONF_AMPLITUDE | SR_CONF_GET | SR_CONF_SET,
  87 };
  88
  89 static const int32_t trigger_matches[] = {
  90         SR_TRIGGER_ZERO,
  91         SR_TRIGGER_ONE,
  92         SR_TRIGGER_RISING,
  93         SR_TRIGGER_FALLING,
  94         SR_TRIGGER_EDGE,
  95 };
  96
  97 static const uint64_t samplerates[] = {
  98         SR_HZ(1),
  99         SR_GHZ(1),
 100         SR_HZ(1),
 101 };
 102
 103 static GSList *scan(struct sr_dev_driver *di, GSList *options)
 104 {
 105         struct dev_context *devc;
 106         struct sr_dev_inst *sdi;
 107         struct sr_channel *ch;
 108         struct sr_channel_group *cg, *acg;
 109         struct sr_config *src;
 110         struct analog_gen *ag;
 111         GSList *l;
 112         int num_logic_channels, num_analog_channels, pattern, i;
 113         uint64_t limit_frames;
 114         char channel_name[16];
 115
 116         num_logic_channels = DEFAULT_NUM_LOGIC_CHANNELS;
 117         num_analog_channels = DEFAULT_NUM_ANALOG_CHANNELS;
 118         limit_frames = DEFAULT_LIMIT_FRAMES;
 119         for (l = options; l; l = l->next) {
 120                 src = l->data;
 121                 switch (src->key) {
 122                 case SR_CONF_NUM_LOGIC_CHANNELS:
 123                         num_logic_channels = g_variant_get_int32(src->data);
 124                         break;
 125                 case SR_CONF_NUM_ANALOG_CHANNELS:
 126                         num_analog_channels = g_variant_get_int32(src->data);
 127                         break;
 128                 case SR_CONF_LIMIT_FRAMES:
 129                         limit_frames = g_variant_get_uint64(src->data);
 130                         break;
 131                 }
 132         }
 133
 134         sdi = g_malloc0(sizeof(struct sr_dev_inst));
 135         sdi->status = SR_ST_INACTIVE;
 136         sdi->model = g_strdup("Demo device");
 137
 138         devc = g_malloc0(sizeof(struct dev_context));
 139         devc->cur_samplerate = SR_KHZ(200);
 140         devc->num_logic_channels = num_logic_channels;
 141         devc->logic_unitsize = (devc->num_logic_channels + 7) / 8;
 142         devc->all_logic_channels_mask = 1UL << 0;
 143         devc->all_logic_channels_mask <<= devc->num_logic_channels;
 144         devc->all_logic_channels_mask--;
 145         devc->logic_pattern = DEFAULT_LOGIC_PATTERN;
 146         devc->num_analog_channels = num_analog_channels;
 147         devc->limit_frames = limit_frames;
 148         devc->capture_ratio = 20;
 149         devc->stl = NULL;
 150
 151         if (num_logic_channels > 0) {
 152                 /* Logic channels, all in one channel group. */
 153                 cg = g_malloc0(sizeof(struct sr_channel_group));
 154                 cg->name = g_strdup("Logic");
 155                 for (i = 0; i < num_logic_channels; i++) {
 156                         sprintf(channel_name, "D%d", i);
 157                         ch = sr_channel_new(sdi, i, SR_CHANNEL_LOGIC, TRUE, channel_name);
 158                         cg->channels = g_slist_append(cg->channels, ch);
 159                 }
 160                 sdi->channel_groups = g_slist_append(NULL, cg);
 161         }
 162
 163         /* Analog channels, channel groups and pattern generators. */
 164         devc->ch_ag = g_hash_table_new(g_direct_hash, g_direct_equal);
 165         if (num_analog_channels > 0) {
 166                 pattern = 0;
 167                 /* An "Analog" channel group with all analog channels in it. */
 168                 acg = g_malloc0(sizeof(struct sr_channel_group));
 169                 acg->name = g_strdup("Analog");
 170                 sdi->channel_groups = g_slist_append(sdi->channel_groups, acg);
 171
 172                 for (i = 0; i < num_analog_channels; i++) {
 173                         snprintf(channel_name, 16, "A%d", i);
 174                         ch = sr_channel_new(sdi, i + num_logic_channels, SR_CHANNEL_ANALOG,
 175                                         TRUE, channel_name);
 176                         acg->channels = g_slist_append(acg->channels, ch);
 177
 178                         /* Every analog channel gets its own channel group as well. */
 179                         cg = g_malloc0(sizeof(struct sr_channel_group));
 180                         cg->name = g_strdup(channel_name);
 181                         cg->channels = g_slist_append(NULL, ch);
 182                         sdi->channel_groups = g_slist_append(sdi->channel_groups, cg);
 183
 184                         /* Every channel gets a generator struct. */
 185                         ag = g_malloc(sizeof(struct analog_gen));
 186                         ag->ch = ch;
 187                         ag->amplitude = DEFAULT_ANALOG_AMPLITUDE;
 188                         sr_analog_init(&ag->packet, &ag->encoding, &ag->meaning, &ag->spec, 2);
 189                         ag->packet.meaning->channels = cg->channels;
 190                         ag->packet.meaning->mq = SR_MQ_VOLTAGE;
 191                         ag->packet.meaning->mqflags = SR_MQFLAG_DC;
 192                         ag->packet.meaning->unit = SR_UNIT_VOLT;
 193                         ag->packet.encoding->digits = DEFAULT_ANALOG_ENCODING_DIGITS;
 194                         ag->packet.spec->spec_digits = DEFAULT_ANALOG_SPEC_DIGITS;
 195                         ag->packet.data = ag->pattern_data;
 196                         ag->pattern = pattern;
 197                         ag->avg_val = 0.0f;
 198                         ag->num_avgs = 0;
 199                         g_hash_table_insert(devc->ch_ag, ch, ag);
 200
 201                         if (++pattern == ARRAY_SIZE(analog_pattern_str))
 202                                 pattern = 0;
 203                 }
 204         }
 205
 206         sdi->priv = devc;
 207
 208         return std_scan_complete(di, g_slist_append(NULL, sdi));
 209 }
 210
 211 static void clear_helper(struct dev_context *devc)
 212 {
 213         GHashTableIter iter;
 214         void *value;
 215
 216         /* Analog generators. */
 217         g_hash_table_iter_init(&iter, devc->ch_ag);
 218         while (g_hash_table_iter_next(&iter, NULL, &value))
 219                 g_free(value);
 220         g_hash_table_unref(devc->ch_ag);
 221 }
 222
 223 static int dev_clear(const struct sr_dev_driver *di)
 224 {
 225         return std_dev_clear_with_callback(di, (std_dev_clear_callback)clear_helper);
 226 }
 227
 228 static int config_get(uint32_t key, GVariant **data,
 229         const struct sr_dev_inst *sdi, const struct sr_channel_group *cg)
 230 {
 231         struct dev_context *devc;
 232         struct sr_channel *ch;
 233         struct analog_gen *ag;
 234         int pattern;
 235
 236         if (!sdi)
 237                 return SR_ERR_ARG;
 238
 239         devc = sdi->priv;
 240         switch (key) {
 241         case SR_CONF_SAMPLERATE:
 242                 *data = g_variant_new_uint64(devc->cur_samplerate);
 243                 break;
 244         case SR_CONF_LIMIT_SAMPLES:
 245                 *data = g_variant_new_uint64(devc->limit_samples);
 246                 break;
 247         case SR_CONF_LIMIT_MSEC:
 248                 *data = g_variant_new_uint64(devc->limit_msec);
 249                 break;
 250         case SR_CONF_LIMIT_FRAMES:
 251                 *data = g_variant_new_uint64(devc->limit_frames);
 252                 break;
 253         case SR_CONF_AVERAGING:
 254                 *data = g_variant_new_boolean(devc->avg);
 255                 break;
 256         case SR_CONF_AVG_SAMPLES:
 257                 *data = g_variant_new_uint64(devc->avg_samples);
 258                 break;
 259         case SR_CONF_PATTERN_MODE:
 260                 if (!cg)
 261                         return SR_ERR_CHANNEL_GROUP;
 262                 /* Any channel in the group will do. */
 263                 ch = cg->channels->data;
 264                 if (ch->type == SR_CHANNEL_LOGIC) {
 265                         pattern = devc->logic_pattern;
 266                         *data = g_variant_new_string(logic_pattern_str[pattern]);
 267                 } else if (ch->type == SR_CHANNEL_ANALOG) {
 268                         ag = g_hash_table_lookup(devc->ch_ag, ch);
 269                         pattern = ag->pattern;
 270                         *data = g_variant_new_string(analog_pattern_str[pattern]);
 271                 } else
 272                         return SR_ERR_BUG;
 273                 break;
 274         case SR_CONF_AMPLITUDE:
 275                 if (!cg)
 276                         return SR_ERR_CHANNEL_GROUP;
 277                 /* Any channel in the group will do. */
 278                 ch = cg->channels->data;
 279                 if (ch->type != SR_CHANNEL_ANALOG)
 280                         return SR_ERR_ARG;
 281                 ag = g_hash_table_lookup(devc->ch_ag, ch);
 282                 *data = g_variant_new_double(ag->amplitude);
 283                 break;
 284         case SR_CONF_CAPTURE_RATIO:
 285                 *data = g_variant_new_uint64(devc->capture_ratio);
 286                 break;
 287         default:
 288                 return SR_ERR_NA;
 289         }
 290
 291         return SR_OK;
 292 }
 293
 294 static int config_set(uint32_t key, GVariant *data,
 295         const struct sr_dev_inst *sdi, const struct sr_channel_group *cg)
 296 {
 297         struct dev_context *devc;
 298         struct analog_gen *ag;
 299         struct sr_channel *ch;
 300         GSList *l;
 301         int logic_pattern, analog_pattern;
 302
 303         devc = sdi->priv;
 304
 305         switch (key) {
 306         case SR_CONF_SAMPLERATE:
 307                 devc->cur_samplerate = g_variant_get_uint64(data);
 308                 break;
 309         case SR_CONF_LIMIT_SAMPLES:
 310                 devc->limit_msec = 0;
 311                 devc->limit_samples = g_variant_get_uint64(data);
 312                 break;
 313         case SR_CONF_LIMIT_MSEC:
 314                 devc->limit_msec = g_variant_get_uint64(data);
 315                 devc->limit_samples = 0;
 316                 break;
 317         case SR_CONF_LIMIT_FRAMES:
 318                 devc->limit_frames = g_variant_get_uint64(data);
 319                 break;
 320         case SR_CONF_AVERAGING:
 321                 devc->avg = g_variant_get_boolean(data);
 322                 sr_dbg("%s averaging", devc->avg ? "Enabling" : "Disabling");
 323                 break;
 324         case SR_CONF_AVG_SAMPLES:
 325                 devc->avg_samples = g_variant_get_uint64(data);
 326                 sr_dbg("Setting averaging rate to %" PRIu64, devc->avg_samples);
 327                 break;
 328         case SR_CONF_PATTERN_MODE:
 329                 if (!cg)
 330                         return SR_ERR_CHANNEL_GROUP;
 331                 logic_pattern = std_str_idx(data, ARRAY_AND_SIZE(logic_pattern_str));
 332                 analog_pattern = std_str_idx(data, ARRAY_AND_SIZE(analog_pattern_str));
 333                 if (logic_pattern < 0 && analog_pattern < 0)
 334                         return SR_ERR_ARG;
 335                 for (l = cg->channels; l; l = l->next) {
 336                         ch = l->data;
 337                         if (ch->type == SR_CHANNEL_LOGIC) {
 338                                 if (logic_pattern == -1)
 339                                         return SR_ERR_ARG;
 340                                 sr_dbg("Setting logic pattern to %s",
 341                                                 logic_pattern_str[logic_pattern]);
 342                                 devc->logic_pattern = logic_pattern;
 343                                 /* Might as well do this now, these are static. */
 344                                 if (logic_pattern == PATTERN_ALL_LOW)
 345                                         memset(devc->logic_data, 0x00, LOGIC_BUFSIZE);
 346                                 else if (logic_pattern == PATTERN_ALL_HIGH)
 347                                         memset(devc->logic_data, 0xff, LOGIC_BUFSIZE);
 348                         } else if (ch->type == SR_CHANNEL_ANALOG) {
 349                                 if (analog_pattern == -1)
 350                                         return SR_ERR_ARG;
 351                                 sr_dbg("Setting analog pattern for channel %s to %s",
 352                                                 ch->name, analog_pattern_str[analog_pattern]);
 353                                 ag = g_hash_table_lookup(devc->ch_ag, ch);
 354                                 ag->pattern = analog_pattern;
 355                         } else
 356                                 return SR_ERR_BUG;
 357                 }
 358                 break;
 359         case SR_CONF_AMPLITUDE:
 360                 if (!cg)
 361                         return SR_ERR_CHANNEL_GROUP;
 362                 for (l = cg->channels; l; l = l->next) {
 363                         ch = l->data;
 364                         if (ch->type != SR_CHANNEL_ANALOG)
 365                                 return SR_ERR_ARG;
 366                         ag = g_hash_table_lookup(devc->ch_ag, ch);
 367                         ag->amplitude = g_variant_get_double(data);
 368                 }
 369                 break;
 370         case SR_CONF_CAPTURE_RATIO:
 371                 devc->capture_ratio = g_variant_get_uint64(data);
 372                 break;
 373         default:
 374                 return SR_ERR_NA;
 375         }
 376
 377         return SR_OK;
 378 }
 379
 380 static int config_list(uint32_t key, GVariant **data,
 381         const struct sr_dev_inst *sdi, const struct sr_channel_group *cg)
 382 {
 383         struct sr_channel *ch;
 384
 385         if (!cg) {
 386                 switch (key) {
 387                 case SR_CONF_SCAN_OPTIONS:
 388                 case SR_CONF_DEVICE_OPTIONS:
 389                         return STD_CONFIG_LIST(key, data, sdi, cg, scanopts, drvopts, devopts);
 390                 case SR_CONF_SAMPLERATE:
 391                         *data = std_gvar_samplerates_steps(ARRAY_AND_SIZE(samplerates));
 392                         break;
 393                 case SR_CONF_TRIGGER_MATCH:
 394                         *data = std_gvar_array_i32(ARRAY_AND_SIZE(trigger_matches));
 395                         break;
 396                 default:
 397                         return SR_ERR_NA;
 398                 }
 399         } else {
 400                 ch = cg->channels->data;
 401                 switch (key) {
 402                 case SR_CONF_DEVICE_OPTIONS:
 403                         if (ch->type == SR_CHANNEL_LOGIC)
 404                                 *data = std_gvar_array_u32(ARRAY_AND_SIZE(devopts_cg_logic));
 405                         else if (ch->type == SR_CHANNEL_ANALOG) {
 406                                 if (strcmp(cg->name, "Analog") == 0)
 407                                         *data = std_gvar_array_u32(ARRAY_AND_SIZE(devopts_cg_analog_group));
 408                                 else
 409                                         *data = std_gvar_array_u32(ARRAY_AND_SIZE(devopts_cg_analog_channel));
 410                         }
 411                         else
 412                                 return SR_ERR_BUG;
 413                         break;
 414                 case SR_CONF_PATTERN_MODE:
 415                         /* The analog group (with all 4 channels) shall not have a pattern property. */
 416                         if (strcmp(cg->name, "Analog") == 0)
 417                                 return SR_ERR_NA;
 418
 419                         if (ch->type == SR_CHANNEL_LOGIC)
 420                                 *data = g_variant_new_strv(ARRAY_AND_SIZE(logic_pattern_str));
 421                         else if (ch->type == SR_CHANNEL_ANALOG)
 422                                 *data = g_variant_new_strv(ARRAY_AND_SIZE(analog_pattern_str));
 423                         else
 424                                 return SR_ERR_BUG;
 425                         break;
 426                 default:
 427                         return SR_ERR_NA;
 428                 }
 429         }
 430
 431         return SR_OK;
 432 }
 433
 434 static int dev_acquisition_start(const struct sr_dev_inst *sdi)
 435 {
 436         struct dev_context *devc;
 437         GSList *l;
 438         struct sr_channel *ch;
 439         int bitpos;
 440         uint8_t mask;
 441         GHashTableIter iter;
 442         void *value;
 443         struct sr_trigger *trigger;
 444
 445         devc = sdi->priv;
 446         devc->sent_samples = 0;
 447         devc->sent_frame_samples = 0;
 448
 449         /* Setup triggers */
 450         if ((trigger = sr_session_trigger_get(sdi->session))) {
 451                 int pre_trigger_samples = 0;
 452                 if (devc->limit_samples > 0)
 453                         pre_trigger_samples = (devc->capture_ratio * devc->limit_samples) / 100;
 454                 devc->stl = soft_trigger_logic_new(sdi, trigger, pre_trigger_samples);
 455                 if (!devc->stl)
 456                         return SR_ERR_MALLOC;
 457
 458                 /* Disable all analog channels since using them when there are logic
 459                  * triggers set up would require having pre-trigger sample buffers
 460                  * for analog sample data.
 461                  */
 462                 for (l = sdi->channels; l; l = l->next) {
 463                         ch = l->data;
 464                         if (ch->type == SR_CHANNEL_ANALOG)
 465                                 ch->enabled = FALSE;
 466                 }
 467         }
 468         devc->trigger_fired = FALSE;
 469
 470         /*
 471          * Determine the numbers of logic and analog channels that are
 472          * involved in the acquisition. Determine an offset and a mask to
 473          * remove excess logic data content before datafeed submission.
 474          */
 475         devc->enabled_logic_channels = 0;
 476         devc->enabled_analog_channels = 0;
 477         for (l = sdi->channels; l; l = l->next) {
 478                 ch = l->data;
 479                 if (!ch->enabled)
 480                         continue;
 481                 if (ch->type == SR_CHANNEL_ANALOG) {
 482                         devc->enabled_analog_channels++;
 483                         continue;
 484                 }
 485                 if (ch->type != SR_CHANNEL_LOGIC)
 486                         continue;
 487                 /*
 488                  * TODO: Need we create a channel map here, such that the
 489                  * session datafeed packets will have a dense representation
 490                  * of the enabled channels' data? For example store channels
 491                  * D3 and D5 in bit positions 0 and 1 respectively, when all
 492                  * other channels are disabled? The current implementation
 493                  * generates a sparse layout, might provide data for logic
 494                  * channels that are disabled while it might suppress data
 495                  * from enabled channels at the same time.
 496                  */
 497                 devc->enabled_logic_channels++;
 498         }
 499         devc->first_partial_logic_index = devc->enabled_logic_channels / 8;
 500         bitpos = devc->enabled_logic_channels % 8;
 501         mask = (1 << bitpos) - 1;
 502         devc->first_partial_logic_mask = mask;
 503         sr_dbg("num logic %zu, partial off %zu, mask 0x%02x.",
 504                 devc->enabled_logic_channels,
 505                 devc->first_partial_logic_index,
 506                 devc->first_partial_logic_mask);
 507
 508         /*
 509          * Have the waveform for analog patterns pre-generated. It's
 510          * supposed to be periodic, so the generator just needs to
 511          * access the prepared sample data (DDS style).
 512          */
 513         g_hash_table_iter_init(&iter, devc->ch_ag);
 514         while (g_hash_table_iter_next(&iter, NULL, &value))
 515                 demo_generate_analog_pattern(value, devc->cur_samplerate);
 516
 517         sr_session_source_add(sdi->session, -1, 0, 100,
 518                         demo_prepare_data, (struct sr_dev_inst *)sdi);
 519
 520         std_session_send_df_header(sdi);
 521
 522         if (devc->limit_frames > 0)
 523                 std_session_send_frame_begin(sdi);
 524
 525         /* We use this timestamp to decide how many more samples to send. */
 526         devc->start_us = g_get_monotonic_time();
 527         devc->spent_us = 0;
 528         devc->step = 0;
 529
 530         return SR_OK;
 531 }
 532
 533 static int dev_acquisition_stop(struct sr_dev_inst *sdi)
 534 {
 535         struct dev_context *devc;
 536
 537         sr_session_source_remove(sdi->session, -1);
 538
 539         devc = sdi->priv;
 540         if (devc->limit_frames > 0)
 541                 std_session_send_frame_end(sdi);
 542
 543         std_session_send_df_end(sdi);
 544
 545         if (devc->stl) {
 546                 soft_trigger_logic_free(devc->stl);
 547                 devc->stl = NULL;
 548         }
 549
 550         return SR_OK;
 551 }
 552
 553 static struct sr_dev_driver demo_driver_info = {
 554         .name = "demo",
 555         .longname = "Demo driver and pattern generator",
 556         .api_version = 1,
 557         .init = std_init,
 558         .cleanup = std_cleanup,
 559         .scan = scan,
 560         .dev_list = std_dev_list,
 561         .dev_clear = dev_clear,
 562         .config_get = config_get,
 563         .config_set = config_set,
 564         .config_list = config_list,
 565         .dev_open = std_dummy_dev_open,
 566         .dev_close = std_dummy_dev_close,
 567         .dev_acquisition_start = dev_acquisition_start,
 568         .dev_acquisition_stop = dev_acquisition_stop,
 569         .context = NULL,
 570 };
 571 SR_REGISTER_DEV_DRIVER(demo_driver_info);