src/hardware/scpi-pps/api.c

   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 static struct sr_dev_driver *di = &scpi_pps_driver_info;
  25 extern unsigned int num_pps_profiles;
  26 extern const struct scpi_pps pps_profiles[];
  27
  28 static const uint32_t scanopts[] = {
  29         SR_CONF_CONN,
  30         SR_CONF_SERIALCOMM,
  31 };
  32
  33 static struct pps_channel_instance pci[] = {
  34         { SR_MQ_VOLTAGE, SCPI_CMD_GET_MEAS_VOLTAGE, "V" },
  35         { SR_MQ_CURRENT, SCPI_CMD_GET_MEAS_CURRENT, "I" },
  36         { SR_MQ_POWER, SCPI_CMD_GET_MEAS_POWER, "P" },
  37 };
  38
  39 static int init(struct sr_context *sr_ctx)
  40 {
  41         return std_init(sr_ctx, di, LOG_PREFIX);
  42 }
  43
  44 static struct sr_dev_inst *probe_device(struct sr_scpi_dev_inst *scpi)
  45 {
  46         struct dev_context *devc;
  47         struct sr_dev_inst *sdi;
  48         struct sr_scpi_hw_info *hw_info;
  49         struct sr_channel_group *cg;
  50         struct sr_channel *ch;
  51         const struct scpi_pps *device;
  52         struct pps_channel *pch;
  53         const struct channel_group_spec *cgs;
  54         struct pps_channel_group *pcg;
  55         GRegex *model_re;
  56         GMatchInfo *model_mi;
  57         GSList *l;
  58         uint64_t mask;
  59         unsigned int ch_num, ch_idx, i, j;
  60         const char *vendor;
  61         char ch_name[16];
  62
  63         if (sr_scpi_get_hw_id(scpi, &hw_info) != SR_OK) {
  64                 sr_info("Couldn't get IDN response.");
  65                 return NULL;
  66         }
  67
  68         device = NULL;
  69         for (i = 0; i < num_pps_profiles; i++) {
  70                 vendor = get_vendor(hw_info->manufacturer);
  71                 if (strcasecmp(vendor, pps_profiles[i].vendor))
  72                         continue;
  73                 model_re = g_regex_new(pps_profiles[i].model, 0, 0, NULL);
  74                 if (g_regex_match(model_re, hw_info->model, 0, &model_mi))
  75                         device = &pps_profiles[i];
  76                 g_match_info_unref(model_mi);
  77                 g_regex_unref(model_re);
  78                 if (device)
  79                         break;
  80         }
  81         if (!device) {
  82                 sr_scpi_hw_info_free(hw_info);
  83                 return NULL;
  84         }
  85
  86         sdi = sr_dev_inst_new(SR_ST_ACTIVE, vendor, hw_info->model,
  87                         hw_info->firmware_version);
  88         sdi->conn = scpi;
  89         sdi->driver = di;
  90         sdi->inst_type = SR_INST_SCPI;
  91         sdi->serial_num = g_strdup(hw_info->serial_number);
  92
  93         sr_scpi_hw_info_free(hw_info);
  94         hw_info = NULL;
  95
  96         devc = g_malloc0(sizeof(struct dev_context));
  97         devc->device = device;
  98         sdi->priv = devc;
  99
 100         ch_idx = 0;
 101         for (ch_num = 0; ch_num < device->num_channels; ch_num++) {
 102                 /* Create one channel per measurable output unit. */
 103                 for (i = 0; i < ARRAY_SIZE(pci); i++) {
 104                         if (!scpi_cmd_get(sdi, pci[i].command))
 105                                 continue;
 106                         g_snprintf(ch_name, 16, "%s%s", pci[i].prefix,
 107                                         device->channels[ch_num].name);
 108                         ch = sr_channel_new(ch_idx++, SR_CHANNEL_ANALOG, TRUE, ch_name);
 109                         pch = g_malloc0(sizeof(struct pps_channel));
 110                         pch->hw_output_idx = ch_num;
 111                         pch->hwname = device->channels[ch_num].name;
 112                         pch->mq = pci[i].mq;
 113                         ch->priv = pch;
 114                         sdi->channels = g_slist_append(sdi->channels, ch);
 115                 }
 116         }
 117
 118         for (i = 0; i < device->num_channel_groups; i++) {
 119                 cgs = &device->channel_groups[i];
 120                 cg = g_malloc0(sizeof(struct sr_channel_group));
 121                 cg->name = g_strdup(cgs->name);
 122                 for (j = 0, mask = 1; j < 64; j++, mask <<= 1) {
 123                         if (cgs->channel_index_mask & mask) {
 124                                 for (l = sdi->channels; l; l = l->next) {
 125                                         ch = l->data;
 126                                         pch = ch->priv;
 127                                         if (pch->hw_output_idx == j)
 128                                                 cg->channels = g_slist_append(cg->channels, ch);
 129                                 }
 130                         }
 131                 }
 132                 pcg = g_malloc0(sizeof(struct pps_channel_group));
 133                 pcg->features = cgs->features;
 134                 cg->priv = pcg;
 135                 sdi->channel_groups = g_slist_append(sdi->channel_groups, cg);
 136         }
 137
 138         scpi_cmd(sdi, SCPI_CMD_LOCAL);
 139         sr_scpi_close(scpi);
 140
 141         return sdi;
 142 }
 143
 144 static GSList *scan(GSList *options)
 145 {
 146         return sr_scpi_scan(di->priv, options, probe_device);
 147 }
 148
 149 static GSList *dev_list(void)
 150 {
 151         return ((struct drv_context *)(di->priv))->instances;
 152 }
 153
 154 static int dev_clear(void)
 155 {
 156         return std_dev_clear(di, NULL);
 157 }
 158
 159 static int dev_open(struct sr_dev_inst *sdi)
 160 {
 161         struct dev_context *devc;
 162         struct sr_scpi_dev_inst *scpi;
 163         GVariant *beeper;
 164
 165         if (sdi->status != SR_ST_ACTIVE)
 166                 return SR_ERR;
 167
 168         scpi = sdi->conn;
 169         if (sr_scpi_open(scpi) < 0)
 170                 return SR_ERR;
 171
 172         sdi->status = SR_ST_ACTIVE;
 173
 174         scpi_cmd(sdi, SCPI_CMD_REMOTE);
 175         devc = sdi->priv;
 176         devc->beeper_was_set = FALSE;
 177         if (scpi_cmd_resp(sdi, &beeper, G_VARIANT_TYPE_BOOLEAN, SCPI_CMD_BEEPER) == SR_OK) {
 178                 if (g_variant_get_boolean(beeper)) {
 179                         devc->beeper_was_set = TRUE;
 180                         scpi_cmd(sdi, SCPI_CMD_BEEPER_DISABLE);
 181                 }
 182                 g_variant_unref(beeper);
 183         }
 184
 185         return SR_OK;
 186 }
 187
 188 static int dev_close(struct sr_dev_inst *sdi)
 189 {
 190         struct sr_scpi_dev_inst *scpi;
 191         struct dev_context *devc;
 192
 193         if (sdi->status != SR_ST_ACTIVE)
 194                 return SR_ERR_DEV_CLOSED;
 195
 196         devc = sdi->priv;
 197         scpi = sdi->conn;
 198         if (scpi) {
 199                 if (devc->beeper_was_set)
 200                         scpi_cmd(sdi, SCPI_CMD_BEEPER_ENABLE);
 201                 scpi_cmd(sdi, SCPI_CMD_LOCAL);
 202                 sr_scpi_close(scpi);
 203                 sdi->status = SR_ST_INACTIVE;
 204         }
 205
 206         return SR_OK;
 207 }
 208
 209 static int cleanup(void)
 210 {
 211         return std_dev_clear(di, NULL);
 212 }
 213
 214 static int config_get(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
 215                 const struct sr_channel_group *cg)
 216 {
 217         struct dev_context *devc;
 218         const GVariantType *gvtype;
 219         unsigned int i;
 220         int cmd, ret;
 221         const char *s;
 222
 223         if (!sdi)
 224                 return SR_ERR_ARG;
 225
 226         devc = sdi->priv;
 227
 228         if (cg) {
 229                 /*
 230                  * These options only apply to channel groups with a single
 231                  * channel -- they're per-channel settings for the device.
 232                  */
 233
 234                 /*
 235                  * Config keys are handled below depending on whether a channel
 236                  * group was provided by the frontend. However some of these
 237                  * take a CG on one PPS but not on others. Check the device's
 238                  * profile for that here, and NULL out the channel group as needed.
 239                  */
 240                 for (i = 0; i < devc->device->num_devopts; i++) {
 241                         if (devc->device->devopts[i] == key) {
 242                                 cg = NULL;
 243                                 break;
 244                         }
 245                 }
 246         }
 247
 248         gvtype = NULL;
 249         cmd = -1;
 250         switch (key) {
 251         case SR_CONF_OUTPUT_ENABLED:
 252                 gvtype = G_VARIANT_TYPE_BOOLEAN;
 253                 cmd = SCPI_CMD_GET_OUTPUT_ENABLED;
 254                 break;
 255         case SR_CONF_OUTPUT_VOLTAGE:
 256                 gvtype = G_VARIANT_TYPE_DOUBLE;
 257                 cmd = SCPI_CMD_GET_MEAS_VOLTAGE;
 258                 break;
 259         case SR_CONF_OUTPUT_VOLTAGE_TARGET:
 260                 gvtype = G_VARIANT_TYPE_DOUBLE;
 261                 cmd = SCPI_CMD_GET_VOLTAGE_TARGET;
 262                 break;
 263         case SR_CONF_OUTPUT_CURRENT:
 264                 gvtype = G_VARIANT_TYPE_DOUBLE;
 265                 cmd = SCPI_CMD_GET_MEAS_CURRENT;
 266                 break;
 267         case SR_CONF_OUTPUT_CURRENT_LIMIT:
 268                 gvtype = G_VARIANT_TYPE_DOUBLE;
 269                 cmd = SCPI_CMD_GET_CURRENT_LIMIT;
 270                 break;
 271         case SR_CONF_OVER_VOLTAGE_PROTECTION_ENABLED:
 272                 gvtype = G_VARIANT_TYPE_BOOLEAN;
 273                 cmd = SCPI_CMD_GET_OVER_VOLTAGE_PROTECTION_ENABLED;
 274                 break;
 275         case SR_CONF_OVER_VOLTAGE_PROTECTION_ACTIVE:
 276                 gvtype = G_VARIANT_TYPE_BOOLEAN;
 277                 cmd = SCPI_CMD_GET_OVER_VOLTAGE_PROTECTION_ACTIVE;
 278                 break;
 279         case SR_CONF_OVER_VOLTAGE_PROTECTION_THRESHOLD:
 280                 gvtype = G_VARIANT_TYPE_DOUBLE;
 281                 cmd = SCPI_CMD_GET_OVER_VOLTAGE_PROTECTION_THRESHOLD;
 282                 break;
 283         case SR_CONF_OVER_CURRENT_PROTECTION_ENABLED:
 284                 gvtype = G_VARIANT_TYPE_BOOLEAN;
 285                 cmd = SCPI_CMD_GET_OVER_CURRENT_PROTECTION_ENABLED;
 286                 break;
 287         case SR_CONF_OVER_CURRENT_PROTECTION_ACTIVE:
 288                 gvtype = G_VARIANT_TYPE_BOOLEAN;
 289                 cmd = SCPI_CMD_GET_OVER_CURRENT_PROTECTION_ACTIVE;
 290                 break;
 291         case SR_CONF_OVER_CURRENT_PROTECTION_THRESHOLD:
 292                 gvtype = G_VARIANT_TYPE_DOUBLE;
 293                 cmd = SCPI_CMD_GET_OVER_CURRENT_PROTECTION_THRESHOLD;
 294                 break;
 295         case SR_CONF_OVER_TEMPERATURE_PROTECTION:
 296                 gvtype = G_VARIANT_TYPE_BOOLEAN;
 297                 cmd = SCPI_CMD_GET_OVER_TEMPERATURE_PROTECTION;
 298                 break;
 299         case SR_CONF_OUTPUT_REGULATION:
 300                 gvtype = G_VARIANT_TYPE_STRING;
 301                 cmd = SCPI_CMD_GET_OUTPUT_REGULATION;
 302         }
 303         if (gvtype) {
 304                 if (cg)
 305                         select_channel(sdi, cg->channels->data);
 306                 ret = scpi_cmd_resp(sdi, data, gvtype, cmd);
 307
 308                 if (gvtype == G_VARIANT_TYPE_STRING && ret == SR_OK) {
 309                         /* Non-standard data type responses. */
 310                         switch (key) {
 311                         case SCPI_CMD_GET_OUTPUT_REGULATION:
 312                                 /*
 313                                  * This is specific to the Rigol DP800 series.
 314                                  * We return the same string for now until more
 315                                  * models with this key are supported. Do a check
 316                                  * just for the hell of it.
 317                                  */
 318                                 s = g_variant_get_string(*data, NULL);
 319                                 if (strcmp(s, "CC") && strcmp(s, "CV") && strcmp(s, "UR")) {
 320                                         sr_dbg("Unknown response to SCPI_CMD_GET_OUTPUT_REGULATION: %s", s);
 321                                         ret = SR_ERR_DATA;
 322                                 }
 323                                 break;
 324                         }
 325                 }
 326         } else
 327                 ret = SR_ERR_NA;
 328
 329         return ret;
 330 }
 331
 332 static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sdi,
 333                 const struct sr_channel_group *cg)
 334 {
 335         double d;
 336         int ret;
 337
 338         if (!sdi)
 339                 return SR_ERR_ARG;
 340
 341         if (sdi->status != SR_ST_ACTIVE)
 342                 return SR_ERR_DEV_CLOSED;
 343
 344         if (cg)
 345                 /* Channel group specified. */
 346                 select_channel(sdi, cg->channels->data);
 347
 348         ret = SR_OK;
 349         switch (key) {
 350         case SR_CONF_OUTPUT_ENABLED:
 351                 if (g_variant_get_boolean(data))
 352                         ret = scpi_cmd(sdi, SCPI_CMD_SET_OUTPUT_ENABLE);
 353                 else
 354                         ret = scpi_cmd(sdi, SCPI_CMD_SET_OUTPUT_DISABLE);
 355                 break;
 356         case SR_CONF_OUTPUT_VOLTAGE_TARGET:
 357                 d = g_variant_get_double(data);
 358                 ret = scpi_cmd(sdi, SCPI_CMD_SET_VOLTAGE_TARGET, d);
 359                 break;
 360         case SR_CONF_OUTPUT_CURRENT_LIMIT:
 361                 d = g_variant_get_double(data);
 362                 ret = scpi_cmd(sdi, SCPI_CMD_SET_CURRENT_LIMIT, d);
 363                 break;
 364         case SR_CONF_OVER_VOLTAGE_PROTECTION_ENABLED:
 365                 if (g_variant_get_boolean(data))
 366                         ret = scpi_cmd(sdi, SCPI_CMD_SET_OVER_VOLTAGE_PROTECTION_ENABLE);
 367                 else
 368                         ret = scpi_cmd(sdi, SCPI_CMD_SET_OVER_VOLTAGE_PROTECTION_DISABLE);
 369                 break;
 370         case SR_CONF_OVER_VOLTAGE_PROTECTION_THRESHOLD:
 371                 d = g_variant_get_double(data);
 372                 ret = scpi_cmd(sdi, SCPI_CMD_SET_OVER_VOLTAGE_PROTECTION_THRESHOLD, d);
 373                 break;
 374         case SR_CONF_OVER_CURRENT_PROTECTION_ENABLED:
 375                 if (g_variant_get_boolean(data))
 376                         ret = scpi_cmd(sdi, SCPI_CMD_SET_OVER_CURRENT_PROTECTION_ENABLE);
 377                 else
 378                         ret = scpi_cmd(sdi, SCPI_CMD_SET_OVER_CURRENT_PROTECTION_DISABLE);
 379                 break;
 380         case SR_CONF_OVER_CURRENT_PROTECTION_THRESHOLD:
 381                 d = g_variant_get_double(data);
 382                 ret = scpi_cmd(sdi, SCPI_CMD_SET_OVER_CURRENT_PROTECTION_THRESHOLD, d);
 383                 break;
 384         case SR_CONF_OVER_TEMPERATURE_PROTECTION:
 385                 if (g_variant_get_boolean(data))
 386                         ret = scpi_cmd(sdi, SCPI_CMD_SET_OVER_TEMPERATURE_PROTECTION_ENABLE);
 387                 else
 388                         ret = scpi_cmd(sdi, SCPI_CMD_SET_OVER_TEMPERATURE_PROTECTION_DISABLE);
 389                 break;
 390         default:
 391                 ret = SR_ERR_NA;
 392         }
 393
 394         return ret;
 395 }
 396
 397 static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
 398                 const struct sr_channel_group *cg)
 399 {
 400         struct dev_context *devc;
 401         struct sr_channel *ch;
 402         struct channel_spec *ch_spec;
 403         GVariant *gvar;
 404         GVariantBuilder gvb;
 405         int ret, i;
 406         const char *s[16];
 407
 408         /* Always available, even without sdi. */
 409         if (key == SR_CONF_SCAN_OPTIONS) {
 410                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 411                                 scanopts, ARRAY_SIZE(scanopts), sizeof(uint32_t));
 412                 return SR_OK;
 413         }
 414
 415         if (!sdi)
 416                 return SR_ERR_ARG;
 417         devc = sdi->priv;
 418
 419         ret = SR_OK;
 420         if (!cg) {
 421                 /* No channel group: global options. */
 422                 switch (key) {
 423                 case SR_CONF_DEVICE_OPTIONS:
 424                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 425                                         devc->device->devopts, devc->device->num_devopts,
 426                                         sizeof(uint32_t));
 427                         break;
 428                 case SR_CONF_OUTPUT_CHANNEL_CONFIG:
 429                         /* Not used. */
 430                         i = 0;
 431                         if (devc->device->features & PPS_INDEPENDENT)
 432                                 s[i++] = "Independent";
 433                         if (devc->device->features & PPS_SERIES)
 434                                 s[i++] = "Series";
 435                         if (devc->device->features & PPS_PARALLEL)
 436                                 s[i++] = "Parallel";
 437                         if (i == 0) {
 438                                 /*
 439                                  * Shouldn't happen: independent-only devices
 440                                  * shouldn't advertise this option at all.
 441                                  */
 442                                 return SR_ERR_NA;
 443                         }
 444                         *data = g_variant_new_strv(s, i);
 445                         break;
 446                 default:
 447                         return SR_ERR_NA;
 448                 }
 449         } else {
 450                 /* Channel group specified. */
 451                 /*
 452                  * Per-channel-group options depending on a channel are actually
 453                  * done with the first channel. Channel groups in PPS can have
 454                  * more than one channel, but they will typically be of equal
 455                  * specification for use in series or parallel mode.
 456                  */
 457                 ch = cg->channels->data;
 458
 459                 switch (key) {
 460                 case SR_CONF_DEVICE_OPTIONS:
 461                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 462                                         devc->device->devopts_cg, devc->device->num_devopts_cg,
 463                                         sizeof(uint32_t));
 464                         break;
 465                 case SR_CONF_OUTPUT_VOLTAGE_TARGET:
 466                         ch_spec = &(devc->device->channels[ch->index]);
 467                         g_variant_builder_init(&gvb, G_VARIANT_TYPE_ARRAY);
 468                         /* Min, max, write resolution. */
 469                         for (i = 0; i < 3; i++) {
 470                                 gvar = g_variant_new_double(ch_spec->voltage[i]);
 471                                 g_variant_builder_add_value(&gvb, gvar);
 472                         }
 473                         *data = g_variant_builder_end(&gvb);
 474                         break;
 475                 case SR_CONF_OUTPUT_CURRENT_LIMIT:
 476                         g_variant_builder_init(&gvb, G_VARIANT_TYPE_ARRAY);
 477                         /* Min, max, step. */
 478                         for (i = 0; i < 3; i++) {
 479                                 ch_spec = &(devc->device->channels[ch->index]);
 480                                 gvar = g_variant_new_double(ch_spec->current[i]);
 481                                 g_variant_builder_add_value(&gvb, gvar);
 482                         }
 483                         *data = g_variant_builder_end(&gvb);
 484                         break;
 485                 default:
 486                         return SR_ERR_NA;
 487                 }
 488         }
 489
 490         return ret;
 491 }
 492
 493 static int dev_acquisition_start(const struct sr_dev_inst *sdi,
 494                 void *cb_data)
 495 {
 496         struct dev_context *devc;
 497         struct sr_scpi_dev_inst *scpi;
 498         struct sr_channel *ch;
 499         struct pps_channel *pch;
 500         int cmd, ret;
 501
 502         if (sdi->status != SR_ST_ACTIVE)
 503                 return SR_ERR_DEV_CLOSED;
 504
 505         devc = sdi->priv;
 506         scpi = sdi->conn;
 507         devc->cb_data = cb_data;
 508
 509         if ((ret = sr_scpi_source_add(sdi->session, scpi, G_IO_IN, 10,
 510                         scpi_pps_receive_data, (void *)sdi)) != SR_OK)
 511                 return ret;
 512         std_session_send_df_header(sdi, LOG_PREFIX);
 513
 514         /* Prime the pipe with the first channel's fetch. */
 515         ch = next_enabled_channel(sdi, NULL);
 516         pch = ch->priv;
 517         if ((ret = select_channel(sdi, ch)) != SR_OK)
 518                 return ret;
 519         if (pch->mq == SR_MQ_VOLTAGE)
 520                 cmd = SCPI_CMD_GET_MEAS_VOLTAGE;
 521         else if (pch->mq == SR_MQ_CURRENT)
 522                 cmd = SCPI_CMD_GET_MEAS_CURRENT;
 523         else if (pch->mq == SR_MQ_POWER)
 524                 cmd = SCPI_CMD_GET_MEAS_POWER;
 525         else
 526                 return SR_ERR;
 527         scpi_cmd(sdi, cmd, pch->hwname);
 528
 529         return SR_OK;
 530 }
 531
 532 static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
 533 {
 534         struct sr_datafeed_packet packet;
 535         struct sr_scpi_dev_inst *scpi;
 536         float f;
 537
 538         (void)cb_data;
 539
 540         if (sdi->status != SR_ST_ACTIVE)
 541                 return SR_ERR_DEV_CLOSED;
 542
 543         scpi = sdi->conn;
 544
 545         /*
 546          * A requested value is certainly on the way. Retrieve it now,
 547          * to avoid leaving the device in a state where it's not expecting
 548          * commands.
 549          */
 550         sr_scpi_get_float(scpi, NULL, &f);
 551         sr_scpi_source_remove(sdi->session, scpi);
 552
 553         packet.type = SR_DF_END;
 554         sr_session_send(sdi, &packet);
 555
 556         return SR_OK;
 557 }
 558
 559 SR_PRIV struct sr_dev_driver scpi_pps_driver_info = {
 560         .name = "scpi-pps",
 561         .longname = "SCPI PPS",
 562         .api_version = 1,
 563         .init = init,
 564         .cleanup = cleanup,
 565         .scan = scan,
 566         .dev_list = dev_list,
 567         .dev_clear = dev_clear,
 568         .config_get = config_get,
 569         .config_set = config_set,
 570         .config_list = config_list,
 571         .dev_open = dev_open,
 572         .dev_close = dev_close,
 573         .dev_acquisition_start = dev_acquisition_start,
 574         .dev_acquisition_stop = dev_acquisition_stop,
 575         .priv = NULL,
 576 };