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 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 };