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  * Copyright (C) 2017 Frank Stettner <frank-stettner@gmx.net>
   6  *
   7  * This program is free software: you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation, either version 3 of the License, or
  10  * (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  19  */
  20
  21 #include <config.h>
  22 #include <string.h>
  23 #include <strings.h>
  24 #include "scpi.h"
  25 #include "protocol.h"
  26
  27 static struct sr_dev_driver scpi_pps_driver_info;
  28 static struct sr_dev_driver hp_ib_pps_driver_info;
  29
  30 static const uint32_t scanopts[] = {
  31         SR_CONF_CONN,
  32         SR_CONF_SERIALCOMM,
  33 };
  34
  35 static const uint32_t drvopts[] = {
  36         SR_CONF_POWER_SUPPLY,
  37 };
  38
  39 static const struct pps_channel_instance pci[] = {
  40         { SR_MQ_VOLTAGE, SCPI_CMD_GET_MEAS_VOLTAGE, "V" },
  41         { SR_MQ_CURRENT, SCPI_CMD_GET_MEAS_CURRENT, "I" },
  42         { SR_MQ_POWER, SCPI_CMD_GET_MEAS_POWER, "P" },
  43         { SR_MQ_FREQUENCY, SCPI_CMD_GET_MEAS_FREQUENCY, "F" },
  44 };
  45
  46 static struct sr_dev_inst *probe_device(struct sr_scpi_dev_inst *scpi,
  47                 int (*get_hw_id)(struct sr_scpi_dev_inst *scpi,
  48                 struct sr_scpi_hw_info **scpi_response))
  49 {
  50         struct dev_context *devc;
  51         struct sr_dev_inst *sdi;
  52         struct sr_scpi_hw_info *hw_info;
  53         struct sr_channel_group *cg;
  54         struct sr_channel *ch;
  55         const struct scpi_pps *device;
  56         struct pps_channel *pch;
  57         struct channel_spec *channels;
  58         struct channel_group_spec *channel_groups, *cgs;
  59         struct pps_channel_group *pcg;
  60         GRegex *model_re;
  61         GMatchInfo *model_mi;
  62         GSList *l;
  63         uint64_t mask;
  64         unsigned int num_channels, num_channel_groups, ch_num, ch_idx, i, j;
  65         int ret;
  66         const char *vendor;
  67         char ch_name[16];
  68
  69         if (get_hw_id(scpi, &hw_info) != SR_OK) {
  70                 sr_info("Couldn't get IDN response.");
  71                 return NULL;
  72         }
  73
  74         device = NULL;
  75         for (i = 0; i < num_pps_profiles; i++) {
  76                 vendor = sr_vendor_alias(hw_info->manufacturer);
  77                 if (g_ascii_strcasecmp(vendor, pps_profiles[i].vendor))
  78                         continue;
  79                 model_re = g_regex_new(pps_profiles[i].model, 0, 0, NULL);
  80                 if (g_regex_match(model_re, hw_info->model, 0, &model_mi))
  81                         device = &pps_profiles[i];
  82                 g_match_info_unref(model_mi);
  83                 g_regex_unref(model_re);
  84                 if (device)
  85                         break;
  86         }
  87         if (!device) {
  88                 sr_scpi_hw_info_free(hw_info);
  89                 return NULL;
  90         }
  91
  92         sdi = g_malloc0(sizeof(struct sr_dev_inst));
  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 = (struct channel_spec *)device->channels;
 108                 num_channels = device->num_channels;
 109                 channel_groups = (struct channel_group_spec *)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 (!sr_scpi_cmd_get(devc->device->commands, 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         sr_scpi_cmd(sdi, devc->device->commands, 0, NULL, SCPI_CMD_LOCAL);
 169
 170         return sdi;
 171 }
 172
 173 static gchar *hpib_get_revision(struct sr_scpi_dev_inst *scpi)
 174 {
 175         int ret;
 176         gboolean matches;
 177         char *response;
 178         GRegex *version_regex;
 179
 180         ret = sr_scpi_get_string(scpi, "ROM?", &response);
 181         if (ret != SR_OK && !response)
 182                 return NULL;
 183
 184         /* Example version string: "B01 B01" */
 185         version_regex = g_regex_new("[A-Z][0-9]{2} [A-Z][0-9]{2}", 0, 0, NULL);
 186         matches = g_regex_match(version_regex, response, 0, NULL);
 187         g_regex_unref(version_regex);
 188
 189         if (!matches) {
 190                 /* Not a valid version string. Ignore it. */
 191                 g_free(response);
 192                 response = NULL;
 193         } else {
 194                 /* Replace space with dot. */
 195                 response[3] = '.';
 196         }
 197
 198         return response;
 199 }
 200
 201 /*
 202  * This function assumes the response is in the form "HP<model_number>"
 203  *
 204  * HP made many GPIB (then called HP-IB) instruments before the SCPI command
 205  * set was introduced into the standard. We haven't seen any non-HP instruments
 206  * which respond to the "ID?" query, so assume all are HP for now.
 207  */
 208 static int hpib_get_hw_id(struct sr_scpi_dev_inst *scpi,
 209                           struct sr_scpi_hw_info **scpi_response)
 210 {
 211         int ret;
 212         char *response;
 213         struct sr_scpi_hw_info *hw_info;
 214
 215         ret = sr_scpi_get_string(scpi, "ID?", &response);
 216         if ((ret != SR_OK) || !response)
 217                 return SR_ERR;
 218
 219         hw_info = g_malloc0(sizeof(struct sr_scpi_hw_info));
 220
 221         *scpi_response = hw_info;
 222         hw_info->model = response;
 223         hw_info->firmware_version = hpib_get_revision(scpi);
 224         hw_info->manufacturer = g_strdup("HP");
 225
 226         return SR_OK;
 227 }
 228
 229 static struct sr_dev_inst *probe_scpi_pps_device(struct sr_scpi_dev_inst *scpi)
 230 {
 231         return probe_device(scpi, sr_scpi_get_hw_id);
 232 }
 233
 234 static struct sr_dev_inst *probe_hpib_pps_device(struct sr_scpi_dev_inst *scpi)
 235 {
 236         return probe_device(scpi, hpib_get_hw_id);
 237 }
 238
 239 static GSList *scan_scpi_pps(struct sr_dev_driver *di, GSList *options)
 240 {
 241         return sr_scpi_scan(di->context, options, probe_scpi_pps_device);
 242 }
 243
 244 static GSList *scan_hpib_pps(struct sr_dev_driver *di, GSList *options)
 245 {
 246         return sr_scpi_scan(di->context, options, probe_hpib_pps_device);
 247 }
 248
 249 static int dev_open(struct sr_dev_inst *sdi)
 250 {
 251         struct dev_context *devc;
 252         struct sr_scpi_dev_inst *scpi;
 253         GVariant *beeper;
 254
 255         scpi = sdi->conn;
 256         if (sr_scpi_open(scpi) < 0)
 257                 return SR_ERR;
 258
 259         devc = sdi->priv;
 260         sr_scpi_cmd(sdi, devc->device->commands, 0, NULL, SCPI_CMD_REMOTE);
 261         devc->beeper_was_set = FALSE;
 262         if (sr_scpi_cmd_resp(sdi, devc->device->commands, 0, NULL,
 263                         &beeper, G_VARIANT_TYPE_BOOLEAN, SCPI_CMD_BEEPER) == SR_OK) {
 264                 if (g_variant_get_boolean(beeper)) {
 265                         devc->beeper_was_set = TRUE;
 266                         sr_scpi_cmd(sdi, devc->device->commands,
 267                                 0, NULL, SCPI_CMD_BEEPER_DISABLE);
 268                 }
 269                 g_variant_unref(beeper);
 270         }
 271
 272         return SR_OK;
 273 }
 274
 275 static int dev_close(struct sr_dev_inst *sdi)
 276 {
 277         struct sr_scpi_dev_inst *scpi;
 278         struct dev_context *devc;
 279
 280         devc = sdi->priv;
 281         scpi = sdi->conn;
 282
 283         if (!scpi)
 284                 return SR_ERR_BUG;
 285
 286         if (devc->beeper_was_set)
 287                 sr_scpi_cmd(sdi, devc->device->commands,
 288                         0, NULL, SCPI_CMD_BEEPER_ENABLE);
 289         sr_scpi_cmd(sdi, devc->device->commands, 0, NULL, SCPI_CMD_LOCAL);
 290
 291         return sr_scpi_close(scpi);
 292 }
 293
 294 static void clear_helper(struct dev_context *devc)
 295 {
 296         g_free(devc->channels);
 297         g_free(devc->channel_groups);
 298 }
 299
 300 static int dev_clear(const struct sr_dev_driver *di)
 301 {
 302         return std_dev_clear_with_callback(di, (std_dev_clear_callback)clear_helper);
 303 }
 304
 305 static int config_get(uint32_t key, GVariant **data,
 306         const struct sr_dev_inst *sdi, const struct sr_channel_group *cg)
 307 {
 308         struct dev_context *devc;
 309         const GVariantType *gvtype;
 310         unsigned int i;
 311         int channel_group_cmd;
 312         char *channel_group_name;
 313         int cmd, ret;
 314         const char *s;
 315
 316         if (!sdi)
 317                 return SR_ERR_ARG;
 318
 319         devc = sdi->priv;
 320
 321         if (cg) {
 322                 /*
 323                  * These options only apply to channel groups with a single
 324                  * channel -- they're per-channel settings for the device.
 325                  */
 326
 327                 /*
 328                  * Config keys are handled below depending on whether a channel
 329                  * group was provided by the frontend. However some of these
 330                  * take a CG on one PPS but not on others. Check the device's
 331                  * profile for that here, and NULL out the channel group as needed.
 332                  */
 333                 for (i = 0; i < devc->device->num_devopts; i++) {
 334                         if (devc->device->devopts[i] == key) {
 335                                 cg = NULL;
 336                                 break;
 337                         }
 338                 }
 339         }
 340
 341         gvtype = NULL;
 342         cmd = -1;
 343         switch (key) {
 344         case SR_CONF_ENABLED:
 345                 gvtype = G_VARIANT_TYPE_BOOLEAN;
 346                 cmd = SCPI_CMD_GET_OUTPUT_ENABLED;
 347                 break;
 348         case SR_CONF_VOLTAGE:
 349                 gvtype = G_VARIANT_TYPE_DOUBLE;
 350                 cmd = SCPI_CMD_GET_MEAS_VOLTAGE;
 351                 break;
 352         case SR_CONF_VOLTAGE_TARGET:
 353                 gvtype = G_VARIANT_TYPE_DOUBLE;
 354                 cmd = SCPI_CMD_GET_VOLTAGE_TARGET;
 355                 break;
 356         case SR_CONF_OUTPUT_FREQUENCY:
 357                 gvtype = G_VARIANT_TYPE_DOUBLE;
 358                 cmd = SCPI_CMD_GET_MEAS_FREQUENCY;
 359                 break;
 360         case SR_CONF_OUTPUT_FREQUENCY_TARGET:
 361                 gvtype = G_VARIANT_TYPE_DOUBLE;
 362                 cmd = SCPI_CMD_GET_FREQUENCY_TARGET;
 363                 break;
 364         case SR_CONF_CURRENT:
 365                 gvtype = G_VARIANT_TYPE_DOUBLE;
 366                 cmd = SCPI_CMD_GET_MEAS_CURRENT;
 367                 break;
 368         case SR_CONF_CURRENT_LIMIT:
 369                 gvtype = G_VARIANT_TYPE_DOUBLE;
 370                 cmd = SCPI_CMD_GET_CURRENT_LIMIT;
 371                 break;
 372         case SR_CONF_OVER_VOLTAGE_PROTECTION_ENABLED:
 373                 gvtype = G_VARIANT_TYPE_BOOLEAN;
 374                 cmd = SCPI_CMD_GET_OVER_VOLTAGE_PROTECTION_ENABLED;
 375                 break;
 376         case SR_CONF_OVER_VOLTAGE_PROTECTION_ACTIVE:
 377                 gvtype = G_VARIANT_TYPE_BOOLEAN;
 378                 cmd = SCPI_CMD_GET_OVER_VOLTAGE_PROTECTION_ACTIVE;
 379                 break;
 380         case SR_CONF_OVER_VOLTAGE_PROTECTION_THRESHOLD:
 381                 gvtype = G_VARIANT_TYPE_DOUBLE;
 382                 cmd = SCPI_CMD_GET_OVER_VOLTAGE_PROTECTION_THRESHOLD;
 383                 break;
 384         case SR_CONF_OVER_CURRENT_PROTECTION_ENABLED:
 385                 gvtype = G_VARIANT_TYPE_BOOLEAN;
 386                 cmd = SCPI_CMD_GET_OVER_CURRENT_PROTECTION_ENABLED;
 387                 break;
 388         case SR_CONF_OVER_CURRENT_PROTECTION_ACTIVE:
 389                 gvtype = G_VARIANT_TYPE_BOOLEAN;
 390                 cmd = SCPI_CMD_GET_OVER_CURRENT_PROTECTION_ACTIVE;
 391                 break;
 392         case SR_CONF_OVER_CURRENT_PROTECTION_THRESHOLD:
 393                 gvtype = G_VARIANT_TYPE_DOUBLE;
 394                 cmd = SCPI_CMD_GET_OVER_CURRENT_PROTECTION_THRESHOLD;
 395                 break;
 396         case SR_CONF_OVER_TEMPERATURE_PROTECTION:
 397                 gvtype = G_VARIANT_TYPE_BOOLEAN;
 398                 cmd = SCPI_CMD_GET_OVER_TEMPERATURE_PROTECTION;
 399                 break;
 400         case SR_CONF_REGULATION:
 401                 gvtype = G_VARIANT_TYPE_STRING;
 402                 cmd = SCPI_CMD_GET_OUTPUT_REGULATION;
 403         }
 404         if (!gvtype)
 405                 return SR_ERR_NA;
 406
 407         channel_group_cmd = 0;
 408         channel_group_name = NULL;
 409         if (cg) {
 410                 channel_group_cmd = SCPI_CMD_SELECT_CHANNEL;
 411                 channel_group_name = g_strdup(cg->name);
 412         }
 413
 414         ret = sr_scpi_cmd_resp(sdi, devc->device->commands,
 415                 channel_group_cmd, channel_group_name, data, gvtype, cmd);
 416         g_free(channel_group_name);
 417
 418         if (cmd == SCPI_CMD_GET_OUTPUT_REGULATION) {
 419                 /*
 420                  * The Rigol DP800 series return CV/CC/UR, Philips PM2800
 421                  * return VOLT/CURR. We always return a GVariant string in
 422                  * the Rigol notation.
 423                  */
 424                 s = g_variant_get_string(*data, NULL);
 425                 if (!strcmp(s, "VOLT")) {
 426                         g_variant_unref(*data);
 427                         *data = g_variant_new_string("CV");
 428                 } else if (!strcmp(s, "CURR")) {
 429                         g_variant_unref(*data);
 430                         *data = g_variant_new_string("CC");
 431                 }
 432
 433                 s = g_variant_get_string(*data, NULL);
 434                 if (strcmp(s, "CV") && strcmp(s, "CC") && strcmp(s, "UR")) {
 435                         sr_dbg("Unknown response to SCPI_CMD_GET_OUTPUT_REGULATION: %s", s);
 436                         ret = SR_ERR_DATA;
 437                 }
 438         }
 439
 440         return ret;
 441 }
 442
 443 static int config_set(uint32_t key, GVariant *data,
 444         const struct sr_dev_inst *sdi, const struct sr_channel_group *cg)
 445 {
 446         struct dev_context *devc;
 447         double d;
 448         int channel_group_cmd;
 449         char *channel_group_name;
 450         int ret;
 451
 452         if (!sdi)
 453                 return SR_ERR_ARG;
 454
 455         channel_group_cmd = 0;
 456         channel_group_name = NULL;
 457         if (cg) {
 458                 channel_group_cmd = SCPI_CMD_SELECT_CHANNEL;
 459                 channel_group_name = g_strdup(cg->name);
 460         }
 461
 462         devc = sdi->priv;
 463
 464         switch (key) {
 465         case SR_CONF_ENABLED:
 466                 if (g_variant_get_boolean(data))
 467                         ret = sr_scpi_cmd(sdi, devc->device->commands,
 468                                         channel_group_cmd, channel_group_name,
 469                                         SCPI_CMD_SET_OUTPUT_ENABLE);
 470                 else
 471                         ret = sr_scpi_cmd(sdi, devc->device->commands,
 472                                         channel_group_cmd, channel_group_name,
 473                                         SCPI_CMD_SET_OUTPUT_DISABLE);
 474                 break;
 475         case SR_CONF_VOLTAGE_TARGET:
 476                 d = g_variant_get_double(data);
 477                 ret = sr_scpi_cmd(sdi, devc->device->commands,
 478                                 channel_group_cmd, channel_group_name,
 479                                 SCPI_CMD_SET_VOLTAGE_TARGET, d);
 480                 break;
 481         case SR_CONF_OUTPUT_FREQUENCY_TARGET:
 482                 d = g_variant_get_double(data);
 483                 ret = sr_scpi_cmd(sdi, devc->device->commands,
 484                                 channel_group_cmd, channel_group_name,
 485                                 SCPI_CMD_SET_FREQUENCY_TARGET, d);
 486                 break;
 487         case SR_CONF_CURRENT_LIMIT:
 488                 d = g_variant_get_double(data);
 489                 ret = sr_scpi_cmd(sdi, devc->device->commands,
 490                                 channel_group_cmd, channel_group_name,
 491                                 SCPI_CMD_SET_CURRENT_LIMIT, d);
 492                 break;
 493         case SR_CONF_OVER_VOLTAGE_PROTECTION_ENABLED:
 494                 if (g_variant_get_boolean(data))
 495                         ret = sr_scpi_cmd(sdi, devc->device->commands,
 496                                         channel_group_cmd, channel_group_name,
 497                                         SCPI_CMD_SET_OVER_VOLTAGE_PROTECTION_ENABLE);
 498                 else
 499                         ret = sr_scpi_cmd(sdi, devc->device->commands,
 500                                         channel_group_cmd, channel_group_name,
 501                                         SCPI_CMD_SET_OVER_VOLTAGE_PROTECTION_DISABLE);
 502                 break;
 503         case SR_CONF_OVER_VOLTAGE_PROTECTION_THRESHOLD:
 504                 d = g_variant_get_double(data);
 505                 ret = sr_scpi_cmd(sdi, devc->device->commands,
 506                                 channel_group_cmd, channel_group_name,
 507                                 SCPI_CMD_SET_OVER_VOLTAGE_PROTECTION_THRESHOLD, d);
 508                 break;
 509         case SR_CONF_OVER_CURRENT_PROTECTION_ENABLED:
 510                 if (g_variant_get_boolean(data))
 511                         ret = sr_scpi_cmd(sdi, devc->device->commands,
 512                                         channel_group_cmd, channel_group_name,
 513                                         SCPI_CMD_SET_OVER_CURRENT_PROTECTION_ENABLE);
 514                 else
 515                         ret = sr_scpi_cmd(sdi, devc->device->commands,
 516                                         channel_group_cmd, channel_group_name,
 517                                         SCPI_CMD_SET_OVER_CURRENT_PROTECTION_DISABLE);
 518                 break;
 519         case SR_CONF_OVER_CURRENT_PROTECTION_THRESHOLD:
 520                 d = g_variant_get_double(data);
 521                 ret = sr_scpi_cmd(sdi, devc->device->commands,
 522                                 channel_group_cmd, channel_group_name,
 523                                 SCPI_CMD_SET_OVER_CURRENT_PROTECTION_THRESHOLD, d);
 524                 break;
 525         case SR_CONF_OVER_TEMPERATURE_PROTECTION:
 526                 if (g_variant_get_boolean(data))
 527                         ret = sr_scpi_cmd(sdi, devc->device->commands,
 528                                         channel_group_cmd, channel_group_name,
 529                                         SCPI_CMD_SET_OVER_TEMPERATURE_PROTECTION_ENABLE);
 530                 else
 531                         ret = sr_scpi_cmd(sdi, devc->device->commands,
 532                                         channel_group_cmd, channel_group_name,
 533                                         SCPI_CMD_SET_OVER_TEMPERATURE_PROTECTION_DISABLE);
 534                 break;
 535         default:
 536                 ret = SR_ERR_NA;
 537         }
 538
 539         g_free(channel_group_name);
 540
 541         return ret;
 542 }
 543
 544 static int config_list(uint32_t key, GVariant **data,
 545         const struct sr_dev_inst *sdi, const struct sr_channel_group *cg)
 546 {
 547         struct dev_context *devc;
 548         struct sr_channel *ch;
 549         const struct channel_spec *ch_spec;
 550         int i;
 551         const char *s[16];
 552
 553         devc = (sdi) ? sdi->priv : NULL;
 554
 555         if (!cg) {
 556                 switch (key) {
 557                 case SR_CONF_SCAN_OPTIONS:
 558                 case SR_CONF_DEVICE_OPTIONS:
 559                         return std_opts_config_list(key, data, sdi, cg,
 560                                 ARRAY_AND_SIZE(scanopts),
 561                                 ARRAY_AND_SIZE(drvopts),
 562                                 (devc && devc->device) ? devc->device->devopts : NULL,
 563                                 (devc && devc->device) ? devc->device->num_devopts : 0);
 564                         break;
 565                 case SR_CONF_CHANNEL_CONFIG:
 566                         if (!devc || !devc->device)
 567                                 return SR_ERR_ARG;
 568                         /* Not used. */
 569                         i = 0;
 570                         if (devc->device->features & PPS_INDEPENDENT)
 571                                 s[i++] = "Independent";
 572                         if (devc->device->features & PPS_SERIES)
 573                                 s[i++] = "Series";
 574                         if (devc->device->features & PPS_PARALLEL)
 575                                 s[i++] = "Parallel";
 576                         if (i == 0) {
 577                                 /*
 578                                  * Shouldn't happen: independent-only devices
 579                                  * shouldn't advertise this option at all.
 580                                  */
 581                                 return SR_ERR_NA;
 582                         }
 583                         *data = g_variant_new_strv(s, i);
 584                         break;
 585                 default:
 586                         return SR_ERR_NA;
 587                 }
 588         } else {
 589                 /*
 590                  * Per-channel-group options depending on a channel are actually
 591                  * done with the first channel. Channel groups in PPS can have
 592                  * more than one channel, but they will typically be of equal
 593                  * specification for use in series or parallel mode.
 594                  */
 595                 ch = cg->channels->data;
 596                 if (!devc || !devc->device)
 597                         return SR_ERR_ARG;
 598                 ch_spec = &(devc->device->channels[ch->index]);
 599
 600                 switch (key) {
 601                 case SR_CONF_DEVICE_OPTIONS:
 602                         *data = std_gvar_array_u32(devc->device->devopts_cg, devc->device->num_devopts_cg);
 603                         break;
 604                 case SR_CONF_VOLTAGE_TARGET:
 605                         *data = std_gvar_min_max_step_array(ch_spec->voltage);
 606                         break;
 607                 case SR_CONF_OUTPUT_FREQUENCY_TARGET:
 608                         *data = std_gvar_min_max_step_array(ch_spec->frequency);
 609                         break;
 610                 case SR_CONF_CURRENT_LIMIT:
 611                         *data = std_gvar_min_max_step_array(ch_spec->current);
 612                         break;
 613                 case SR_CONF_OVER_VOLTAGE_PROTECTION_THRESHOLD:
 614                         *data = std_gvar_min_max_step_array(ch_spec->ovp);
 615                         break;
 616                 case SR_CONF_OVER_CURRENT_PROTECTION_THRESHOLD:
 617                         *data = std_gvar_min_max_step_array(ch_spec->ocp);
 618                         break;
 619                 default:
 620                         return SR_ERR_NA;
 621                 }
 622         }
 623
 624         return SR_OK;
 625 }
 626
 627 static int dev_acquisition_start(const struct sr_dev_inst *sdi)
 628 {
 629         struct dev_context *devc;
 630         struct sr_scpi_dev_inst *scpi;
 631         int ret;
 632
 633         devc = sdi->priv;
 634         scpi = sdi->conn;
 635
 636         /* Prime the pipe with the first channel. */
 637         devc->cur_acquisition_channel = sr_next_enabled_channel(sdi, NULL);
 638
 639         if ((ret = sr_scpi_source_add(sdi->session, scpi, G_IO_IN, 10,
 640                         scpi_pps_receive_data, (void *)sdi)) != SR_OK)
 641                 return ret;
 642         std_session_send_df_header(sdi);
 643
 644         return SR_OK;
 645 }
 646
 647 static int dev_acquisition_stop(struct sr_dev_inst *sdi)
 648 {
 649         struct sr_scpi_dev_inst *scpi;
 650         double d;
 651
 652         scpi = sdi->conn;
 653
 654         /*
 655          * A requested value is certainly on the way. Retrieve it now,
 656          * to avoid leaving the device in a state where it's not expecting
 657          * commands.
 658          *
 659          * TODO: Doesn't work for (at least) the HP 66XXB models.
 660          */
 661         sr_scpi_get_double(scpi, NULL, &d);
 662         sr_scpi_source_remove(sdi->session, scpi);
 663
 664         std_session_send_df_end(sdi);
 665
 666         return SR_OK;
 667 }
 668
 669 static struct sr_dev_driver scpi_pps_driver_info = {
 670         .name = "scpi-pps",
 671         .longname = "SCPI PPS",
 672         .api_version = 1,
 673         .init = std_init,
 674         .cleanup = std_cleanup,
 675         .scan = scan_scpi_pps,
 676         .dev_list = std_dev_list,
 677         .dev_clear = dev_clear,
 678         .config_get = config_get,
 679         .config_set = config_set,
 680         .config_list = config_list,
 681         .dev_open = dev_open,
 682         .dev_close = dev_close,
 683         .dev_acquisition_start = dev_acquisition_start,
 684         .dev_acquisition_stop = dev_acquisition_stop,
 685         .context = NULL,
 686 };
 687
 688 static struct sr_dev_driver hp_ib_pps_driver_info = {
 689         .name = "hpib-pps",
 690         .longname = "HP-IB PPS",
 691         .api_version = 1,
 692         .init = std_init,
 693         .cleanup = std_cleanup,
 694         .scan = scan_hpib_pps,
 695         .dev_list = std_dev_list,
 696         .dev_clear = dev_clear,
 697         .config_get = config_get,
 698         .config_set = config_set,
 699         .config_list = config_list,
 700         .dev_open = dev_open,
 701         .dev_close = dev_close,
 702         .dev_acquisition_start = dev_acquisition_start,
 703         .dev_acquisition_stop = dev_acquisition_stop,
 704         .context = NULL,
 705 };
 706 SR_REGISTER_DEV_DRIVER(scpi_pps_driver_info);
 707 SR_REGISTER_DEV_DRIVER(hp_ib_pps_driver_info);