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