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) 2017,2019 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         sr_sw_limits_init(&devc->limits);
 104         sdi->priv = devc;
 105
 106         if (device->num_channels) {
 107                 /* Static channels and groups. */
 108                 channels = (struct channel_spec *)device->channels;
 109                 num_channels = device->num_channels;
 110                 channel_groups = (struct channel_group_spec *)device->channel_groups;
 111                 num_channel_groups = device->num_channel_groups;
 112         } else {
 113                 /* Channels and groups need to be probed. */
 114                 ret = device->probe_channels(sdi, hw_info, &channels, &num_channels,
 115                                 &channel_groups, &num_channel_groups);
 116                 if (ret != SR_OK) {
 117                         sr_err("Failed to probe for channels.");
 118                         return NULL;
 119                 }
 120                 /*
 121                  * Since these were dynamically allocated, we'll need to free them
 122                  * later.
 123                  */
 124                 devc->channels = channels;
 125                 devc->channel_groups = channel_groups;
 126         }
 127
 128         ch_idx = 0;
 129         for (ch_num = 0; ch_num < num_channels; ch_num++) {
 130                 /* Create one channel per measurable output unit. */
 131                 for (i = 0; i < ARRAY_SIZE(pci); i++) {
 132                         if (!sr_scpi_cmd_get(devc->device->commands, pci[i].command))
 133                                 continue;
 134                         g_snprintf(ch_name, 16, "%s%s", pci[i].prefix,
 135                                         channels[ch_num].name);
 136                         ch = sr_channel_new(sdi, ch_idx++, SR_CHANNEL_ANALOG, TRUE,
 137                                         ch_name);
 138                         pch = g_malloc0(sizeof(struct pps_channel));
 139                         pch->hw_output_idx = ch_num;
 140                         pch->hwname = channels[ch_num].name;
 141                         pch->mq = pci[i].mq;
 142                         ch->priv = pch;
 143                 }
 144         }
 145
 146         for (i = 0; i < num_channel_groups; i++) {
 147                 cgs = &channel_groups[i];
 148                 cg = g_malloc0(sizeof(struct sr_channel_group));
 149                 cg->name = g_strdup(cgs->name);
 150                 for (j = 0, mask = 1; j < 64; j++, mask <<= 1) {
 151                         if (cgs->channel_index_mask & mask) {
 152                                 for (l = sdi->channels; l; l = l->next) {
 153                                         ch = l->data;
 154                                         pch = ch->priv;
 155                                         /* Add mqflags from channel_group_spec only to voltage
 156                                          * and current channels
 157                                          */
 158                                         if (pch->mq == SR_MQ_VOLTAGE || pch->mq == SR_MQ_CURRENT)
 159                                                 pch->mqflags = cgs->mqflags;
 160                                         else
 161                                                 pch->mqflags = 0;
 162                                         if (pch->hw_output_idx == j)
 163                                                 cg->channels = g_slist_append(cg->channels, ch);
 164                                 }
 165                         }
 166                 }
 167                 pcg = g_malloc0(sizeof(struct pps_channel_group));
 168                 pcg->features = cgs->features;
 169                 cg->priv = pcg;
 170                 sdi->channel_groups = g_slist_append(sdi->channel_groups, cg);
 171         }
 172
 173         sr_scpi_hw_info_free(hw_info);
 174         hw_info = NULL;
 175
 176         sr_scpi_cmd(sdi, devc->device->commands, 0, NULL, SCPI_CMD_LOCAL);
 177
 178         return sdi;
 179 }
 180
 181 static gchar *hpib_get_revision(struct sr_scpi_dev_inst *scpi)
 182 {
 183         int ret;
 184         gboolean matches;
 185         char *response;
 186         GRegex *version_regex;
 187
 188         ret = sr_scpi_get_string(scpi, "ROM?", &response);
 189         if (ret != SR_OK && !response)
 190                 return NULL;
 191
 192         /* Example version string: "B01 B01" */
 193         version_regex = g_regex_new("[A-Z][0-9]{2} [A-Z][0-9]{2}", 0, 0, NULL);
 194         matches = g_regex_match(version_regex, response, 0, NULL);
 195         g_regex_unref(version_regex);
 196
 197         if (!matches) {
 198                 /* Not a valid version string. Ignore it. */
 199                 g_free(response);
 200                 response = NULL;
 201         } else {
 202                 /* Replace space with dot. */
 203                 response[3] = '.';
 204         }
 205
 206         return response;
 207 }
 208
 209 /*
 210  * This function assumes the response is in the form "HP<model_number>"
 211  *
 212  * HP made many GPIB (then called HP-IB) instruments before the SCPI command
 213  * set was introduced into the standard. We haven't seen any non-HP instruments
 214  * which respond to the "ID?" query, so assume all are HP for now.
 215  */
 216 static int hpib_get_hw_id(struct sr_scpi_dev_inst *scpi,
 217                           struct sr_scpi_hw_info **scpi_response)
 218 {
 219         int ret;
 220         char *response;
 221         struct sr_scpi_hw_info *hw_info;
 222
 223         ret = sr_scpi_get_string(scpi, "ID?", &response);
 224         if ((ret != SR_OK) || !response)
 225                 return SR_ERR;
 226
 227         hw_info = g_malloc0(sizeof(struct sr_scpi_hw_info));
 228
 229         *scpi_response = hw_info;
 230         hw_info->model = response;
 231         hw_info->firmware_version = hpib_get_revision(scpi);
 232         hw_info->manufacturer = g_strdup("HP");
 233
 234         return SR_OK;
 235 }
 236
 237 static struct sr_dev_inst *probe_scpi_pps_device(struct sr_scpi_dev_inst *scpi)
 238 {
 239         return probe_device(scpi, sr_scpi_get_hw_id);
 240 }
 241
 242 static struct sr_dev_inst *probe_hpib_pps_device(struct sr_scpi_dev_inst *scpi)
 243 {
 244         return probe_device(scpi, hpib_get_hw_id);
 245 }
 246
 247 static GSList *scan_scpi_pps(struct sr_dev_driver *di, GSList *options)
 248 {
 249         return sr_scpi_scan(di->context, options, probe_scpi_pps_device);
 250 }
 251
 252 static GSList *scan_hpib_pps(struct sr_dev_driver *di, GSList *options)
 253 {
 254         return sr_scpi_scan(di->context, options, probe_hpib_pps_device);
 255 }
 256
 257 static int dev_open(struct sr_dev_inst *sdi)
 258 {
 259         struct dev_context *devc;
 260         struct sr_scpi_dev_inst *scpi;
 261         GVariant *beeper;
 262
 263         scpi = sdi->conn;
 264         if (sr_scpi_open(scpi) < 0)
 265                 return SR_ERR;
 266
 267         devc = sdi->priv;
 268         sr_scpi_cmd(sdi, devc->device->commands, 0, NULL, SCPI_CMD_REMOTE);
 269         devc->beeper_was_set = FALSE;
 270         if (sr_scpi_cmd_resp(sdi, devc->device->commands, 0, NULL,
 271                         &beeper, G_VARIANT_TYPE_BOOLEAN, SCPI_CMD_BEEPER) == SR_OK) {
 272                 if (g_variant_get_boolean(beeper)) {
 273                         devc->beeper_was_set = TRUE;
 274                         sr_scpi_cmd(sdi, devc->device->commands,
 275                                 0, NULL, SCPI_CMD_BEEPER_DISABLE);
 276                 }
 277                 g_variant_unref(beeper);
 278         }
 279
 280         return SR_OK;
 281 }
 282
 283 static int dev_close(struct sr_dev_inst *sdi)
 284 {
 285         struct sr_scpi_dev_inst *scpi;
 286         struct dev_context *devc;
 287
 288         devc = sdi->priv;
 289         scpi = sdi->conn;
 290
 291         if (!scpi)
 292                 return SR_ERR_BUG;
 293
 294         if (devc->beeper_was_set)
 295                 sr_scpi_cmd(sdi, devc->device->commands,
 296                         0, NULL, SCPI_CMD_BEEPER_ENABLE);
 297         sr_scpi_cmd(sdi, devc->device->commands, 0, NULL, SCPI_CMD_LOCAL);
 298
 299         return sr_scpi_close(scpi);
 300 }
 301
 302 static void clear_helper(struct dev_context *devc)
 303 {
 304         g_free(devc->channels);
 305         g_free(devc->channel_groups);
 306 }
 307
 308 static int dev_clear(const struct sr_dev_driver *di)
 309 {
 310         return std_dev_clear_with_callback(di, (std_dev_clear_callback)clear_helper);
 311 }
 312
 313 static int config_get(uint32_t key, GVariant **data,
 314         const struct sr_dev_inst *sdi, const struct sr_channel_group *cg)
 315 {
 316         struct dev_context *devc;
 317         const GVariantType *gvtype;
 318         unsigned int i;
 319         int channel_group_cmd;
 320         char *channel_group_name;
 321         int cmd, ret;
 322         const char *s;
 323         int reg;
 324
 325         if (!sdi)
 326                 return SR_ERR_ARG;
 327
 328         devc = sdi->priv;
 329
 330         if (cg) {
 331                 /*
 332                  * These options only apply to channel groups with a single
 333                  * channel -- they're per-channel settings for the device.
 334                  */
 335
 336                 /*
 337                  * Config keys are handled below depending on whether a channel
 338                  * group was provided by the frontend. However some of these
 339                  * take a CG on one PPS but not on others. Check the device's
 340                  * profile for that here, and NULL out the channel group as needed.
 341                  */
 342                 for (i = 0; i < devc->device->num_devopts; i++) {
 343                         if (devc->device->devopts[i] == key) {
 344                                 cg = NULL;
 345                                 break;
 346                         }
 347                 }
 348         }
 349
 350         gvtype = NULL;
 351         cmd = -1;
 352         switch (key) {
 353         case SR_CONF_ENABLED:
 354                 gvtype = G_VARIANT_TYPE_BOOLEAN;
 355                 cmd = SCPI_CMD_GET_OUTPUT_ENABLED;
 356                 break;
 357         case SR_CONF_VOLTAGE:
 358                 gvtype = G_VARIANT_TYPE_DOUBLE;
 359                 cmd = SCPI_CMD_GET_MEAS_VOLTAGE;
 360                 break;
 361         case SR_CONF_VOLTAGE_TARGET:
 362                 gvtype = G_VARIANT_TYPE_DOUBLE;
 363                 cmd = SCPI_CMD_GET_VOLTAGE_TARGET;
 364                 break;
 365         case SR_CONF_OUTPUT_FREQUENCY:
 366                 gvtype = G_VARIANT_TYPE_DOUBLE;
 367                 cmd = SCPI_CMD_GET_MEAS_FREQUENCY;
 368                 break;
 369         case SR_CONF_OUTPUT_FREQUENCY_TARGET:
 370                 gvtype = G_VARIANT_TYPE_DOUBLE;
 371                 cmd = SCPI_CMD_GET_FREQUENCY_TARGET;
 372                 break;
 373         case SR_CONF_CURRENT:
 374                 gvtype = G_VARIANT_TYPE_DOUBLE;
 375                 cmd = SCPI_CMD_GET_MEAS_CURRENT;
 376                 break;
 377         case SR_CONF_CURRENT_LIMIT:
 378                 gvtype = G_VARIANT_TYPE_DOUBLE;
 379                 cmd = SCPI_CMD_GET_CURRENT_LIMIT;
 380                 break;
 381         case SR_CONF_OVER_VOLTAGE_PROTECTION_ENABLED:
 382                 gvtype = G_VARIANT_TYPE_BOOLEAN;
 383                 cmd = SCPI_CMD_GET_OVER_VOLTAGE_PROTECTION_ENABLED;
 384                 break;
 385         case SR_CONF_OVER_VOLTAGE_PROTECTION_ACTIVE:
 386                 if (devc->device->dialect == SCPI_DIALECT_HP_66XXB)
 387                         gvtype = G_VARIANT_TYPE_STRING;
 388                 else
 389                         gvtype = G_VARIANT_TYPE_BOOLEAN;
 390                 cmd = SCPI_CMD_GET_OVER_VOLTAGE_PROTECTION_ACTIVE;
 391                 break;
 392         case SR_CONF_OVER_VOLTAGE_PROTECTION_THRESHOLD:
 393                 gvtype = G_VARIANT_TYPE_DOUBLE;
 394                 cmd = SCPI_CMD_GET_OVER_VOLTAGE_PROTECTION_THRESHOLD;
 395                 break;
 396         case SR_CONF_OVER_CURRENT_PROTECTION_ENABLED:
 397                 gvtype = G_VARIANT_TYPE_BOOLEAN;
 398                 cmd = SCPI_CMD_GET_OVER_CURRENT_PROTECTION_ENABLED;
 399                 break;
 400         case SR_CONF_OVER_CURRENT_PROTECTION_ACTIVE:
 401                 if (devc->device->dialect == SCPI_DIALECT_HP_66XXB)
 402                         gvtype = G_VARIANT_TYPE_STRING;
 403                 else
 404                         gvtype = G_VARIANT_TYPE_BOOLEAN;
 405                 cmd = SCPI_CMD_GET_OVER_CURRENT_PROTECTION_ACTIVE;
 406                 break;
 407         case SR_CONF_OVER_CURRENT_PROTECTION_THRESHOLD:
 408                 gvtype = G_VARIANT_TYPE_DOUBLE;
 409                 cmd = SCPI_CMD_GET_OVER_CURRENT_PROTECTION_THRESHOLD;
 410                 break;
 411         case SR_CONF_OVER_TEMPERATURE_PROTECTION:
 412                 gvtype = G_VARIANT_TYPE_BOOLEAN;
 413                 cmd = SCPI_CMD_GET_OVER_TEMPERATURE_PROTECTION;
 414                 break;
 415         case SR_CONF_OVER_TEMPERATURE_PROTECTION_ACTIVE:
 416                 if (devc->device->dialect == SCPI_DIALECT_HP_66XXB)
 417                         gvtype = G_VARIANT_TYPE_STRING;
 418                 else
 419                         gvtype = G_VARIANT_TYPE_BOOLEAN;
 420                 cmd = SCPI_CMD_GET_OVER_TEMPERATURE_PROTECTION_ACTIVE;
 421                 break;
 422         case SR_CONF_REGULATION:
 423                 gvtype = G_VARIANT_TYPE_STRING;
 424                 cmd = SCPI_CMD_GET_OUTPUT_REGULATION;
 425                 break;
 426         default:
 427                 return sr_sw_limits_config_get(&devc->limits, key, data);
 428         }
 429         if (!gvtype)
 430                 return SR_ERR_NA;
 431
 432         channel_group_cmd = 0;
 433         channel_group_name = NULL;
 434         if (cg) {
 435                 channel_group_cmd = SCPI_CMD_SELECT_CHANNEL;
 436                 channel_group_name = g_strdup(cg->name);
 437         }
 438
 439         ret = sr_scpi_cmd_resp(sdi, devc->device->commands,
 440                 channel_group_cmd, channel_group_name, data, gvtype, cmd);
 441         g_free(channel_group_name);
 442
 443         /*
 444          * Handle special cases
 445          */
 446
 447         if (cmd == SCPI_CMD_GET_OUTPUT_REGULATION) {
 448                 if (devc->device->dialect == SCPI_DIALECT_PHILIPS) {
 449                         /*
 450                         * The Philips PM2800 series returns VOLT/CURR. We always return
 451                         * a GVariant string in the Rigol notation (CV/CC/UR).
 452                         */
 453                         s = g_variant_get_string(*data, NULL);
 454                         if (!g_strcmp0(s, "VOLT")) {
 455                                 g_variant_unref(*data);
 456                                 *data = g_variant_new_string("CV");
 457                         } else if (!g_strcmp0(s, "CURR")) {
 458                                 g_variant_unref(*data);
 459                                 *data = g_variant_new_string("CC");
 460                         }
 461                 }
 462                 if (devc->device->dialect == SCPI_DIALECT_HP_66XXB) {
 463                         /* Evaluate Operational Status Register from a HP 66xxB. */
 464                         s = g_variant_get_string(*data, NULL);
 465                         sr_atoi(s, &reg);
 466                         g_variant_unref(*data);
 467                         if (reg & (1 << 8))
 468                                 *data = g_variant_new_string("CV");
 469                         else if (reg & (1 << 10))
 470                                 *data = g_variant_new_string("CC");
 471                         else if (reg & (1 << 11))
 472                                 *data = g_variant_new_string("CC-");
 473                         else
 474                                 *data = g_variant_new_string("UR");
 475                 }
 476
 477                 s = g_variant_get_string(*data, NULL);
 478                 if (g_strcmp0(s, "CV") && g_strcmp0(s, "CC") &&
 479                         g_strcmp0(s, "CC-") && g_strcmp0(s, "UR")) {
 480
 481                         sr_err("Unknown response to SCPI_CMD_GET_OUTPUT_REGULATION: %s", s);
 482                         ret = SR_ERR_DATA;
 483                 }
 484         }
 485
 486         if (cmd == SCPI_CMD_GET_OVER_VOLTAGE_PROTECTION_ACTIVE) {
 487                 if (devc->device->dialect == SCPI_DIALECT_HP_66XXB) {
 488                         /* Evaluate Questionable Status Register bit 0 from a HP 66xxB. */
 489                         s = g_variant_get_string(*data, NULL);
 490                         sr_atoi(s, &reg);
 491                         g_variant_unref(*data);
 492                         *data = g_variant_new_boolean(reg & (1 << 0));
 493                 }
 494         }
 495
 496         if (cmd == SCPI_CMD_GET_OVER_CURRENT_PROTECTION_ACTIVE) {
 497                 if (devc->device->dialect == SCPI_DIALECT_HP_66XXB) {
 498                         /* Evaluate Questionable Status Register bit 1 from a HP 66xxB. */
 499                         s = g_variant_get_string(*data, NULL);
 500                         sr_atoi(s, &reg);
 501                         g_variant_unref(*data);
 502                         *data = g_variant_new_boolean(reg & (1 << 1));
 503                 }
 504         }
 505
 506         if (cmd == SCPI_CMD_GET_OVER_TEMPERATURE_PROTECTION_ACTIVE) {
 507                 if (devc->device->dialect == SCPI_DIALECT_HP_66XXB) {
 508                         /* Evaluate Questionable Status Register bit 4 from a HP 66xxB. */
 509                         s = g_variant_get_string(*data, NULL);
 510                         sr_atoi(s, &reg);
 511                         g_variant_unref(*data);
 512                         *data = g_variant_new_boolean(reg & (1 << 4));
 513                 }
 514         }
 515
 516         return ret;
 517 }
 518
 519 static int config_set(uint32_t key, GVariant *data,
 520         const struct sr_dev_inst *sdi, const struct sr_channel_group *cg)
 521 {
 522         struct dev_context *devc;
 523         double d;
 524         int channel_group_cmd;
 525         char *channel_group_name;
 526         int ret;
 527
 528         if (!sdi)
 529                 return SR_ERR_ARG;
 530
 531         channel_group_cmd = 0;
 532         channel_group_name = NULL;
 533         if (cg) {
 534                 channel_group_cmd = SCPI_CMD_SELECT_CHANNEL;
 535                 channel_group_name = g_strdup(cg->name);
 536         }
 537
 538         devc = sdi->priv;
 539
 540         switch (key) {
 541         case SR_CONF_ENABLED:
 542                 if (g_variant_get_boolean(data))
 543                         ret = sr_scpi_cmd(sdi, devc->device->commands,
 544                                         channel_group_cmd, channel_group_name,
 545                                         SCPI_CMD_SET_OUTPUT_ENABLE);
 546                 else
 547                         ret = sr_scpi_cmd(sdi, devc->device->commands,
 548                                         channel_group_cmd, channel_group_name,
 549                                         SCPI_CMD_SET_OUTPUT_DISABLE);
 550                 break;
 551         case SR_CONF_VOLTAGE_TARGET:
 552                 d = g_variant_get_double(data);
 553                 ret = sr_scpi_cmd(sdi, devc->device->commands,
 554                                 channel_group_cmd, channel_group_name,
 555                                 SCPI_CMD_SET_VOLTAGE_TARGET, d);
 556                 break;
 557         case SR_CONF_OUTPUT_FREQUENCY_TARGET:
 558                 d = g_variant_get_double(data);
 559                 ret = sr_scpi_cmd(sdi, devc->device->commands,
 560                                 channel_group_cmd, channel_group_name,
 561                                 SCPI_CMD_SET_FREQUENCY_TARGET, d);
 562                 break;
 563         case SR_CONF_CURRENT_LIMIT:
 564                 d = g_variant_get_double(data);
 565                 ret = sr_scpi_cmd(sdi, devc->device->commands,
 566                                 channel_group_cmd, channel_group_name,
 567                                 SCPI_CMD_SET_CURRENT_LIMIT, d);
 568                 break;
 569         case SR_CONF_OVER_VOLTAGE_PROTECTION_ENABLED:
 570                 if (g_variant_get_boolean(data))
 571                         ret = sr_scpi_cmd(sdi, devc->device->commands,
 572                                         channel_group_cmd, channel_group_name,
 573                                         SCPI_CMD_SET_OVER_VOLTAGE_PROTECTION_ENABLE);
 574                 else
 575                         ret = sr_scpi_cmd(sdi, devc->device->commands,
 576                                         channel_group_cmd, channel_group_name,
 577                                         SCPI_CMD_SET_OVER_VOLTAGE_PROTECTION_DISABLE);
 578                 break;
 579         case SR_CONF_OVER_VOLTAGE_PROTECTION_THRESHOLD:
 580                 d = g_variant_get_double(data);
 581                 ret = sr_scpi_cmd(sdi, devc->device->commands,
 582                                 channel_group_cmd, channel_group_name,
 583                                 SCPI_CMD_SET_OVER_VOLTAGE_PROTECTION_THRESHOLD, d);
 584                 break;
 585         case SR_CONF_OVER_CURRENT_PROTECTION_ENABLED:
 586                 if (g_variant_get_boolean(data))
 587                         ret = sr_scpi_cmd(sdi, devc->device->commands,
 588                                         channel_group_cmd, channel_group_name,
 589                                         SCPI_CMD_SET_OVER_CURRENT_PROTECTION_ENABLE);
 590                 else
 591                         ret = sr_scpi_cmd(sdi, devc->device->commands,
 592                                         channel_group_cmd, channel_group_name,
 593                                         SCPI_CMD_SET_OVER_CURRENT_PROTECTION_DISABLE);
 594                 break;
 595         case SR_CONF_OVER_CURRENT_PROTECTION_THRESHOLD:
 596                 d = g_variant_get_double(data);
 597                 ret = sr_scpi_cmd(sdi, devc->device->commands,
 598                                 channel_group_cmd, channel_group_name,
 599                                 SCPI_CMD_SET_OVER_CURRENT_PROTECTION_THRESHOLD, d);
 600                 break;
 601         case SR_CONF_OVER_TEMPERATURE_PROTECTION:
 602                 if (g_variant_get_boolean(data))
 603                         ret = sr_scpi_cmd(sdi, devc->device->commands,
 604                                         channel_group_cmd, channel_group_name,
 605                                         SCPI_CMD_SET_OVER_TEMPERATURE_PROTECTION_ENABLE);
 606                 else
 607                         ret = sr_scpi_cmd(sdi, devc->device->commands,
 608                                         channel_group_cmd, channel_group_name,
 609                                         SCPI_CMD_SET_OVER_TEMPERATURE_PROTECTION_DISABLE);
 610                 break;
 611         default:
 612                 ret = sr_sw_limits_config_set(&devc->limits, key, data);
 613         }
 614
 615         g_free(channel_group_name);
 616
 617         return ret;
 618 }
 619
 620 static int config_list(uint32_t key, GVariant **data,
 621         const struct sr_dev_inst *sdi, const struct sr_channel_group *cg)
 622 {
 623         struct dev_context *devc;
 624         struct sr_channel *ch;
 625         const struct channel_spec *ch_spec;
 626         int i;
 627         const char *s[16];
 628
 629         devc = (sdi) ? sdi->priv : NULL;
 630
 631         if (!cg) {
 632                 switch (key) {
 633                 case SR_CONF_SCAN_OPTIONS:
 634                 case SR_CONF_DEVICE_OPTIONS:
 635                         return std_opts_config_list(key, data, sdi, cg,
 636                                 ARRAY_AND_SIZE(scanopts),
 637                                 ARRAY_AND_SIZE(drvopts),
 638                                 (devc && devc->device) ? devc->device->devopts : NULL,
 639                                 (devc && devc->device) ? devc->device->num_devopts : 0);
 640                         break;
 641                 case SR_CONF_CHANNEL_CONFIG:
 642                         if (!devc || !devc->device)
 643                                 return SR_ERR_ARG;
 644                         /* Not used. */
 645                         i = 0;
 646                         if (devc->device->features & PPS_INDEPENDENT)
 647                                 s[i++] = "Independent";
 648                         if (devc->device->features & PPS_SERIES)
 649                                 s[i++] = "Series";
 650                         if (devc->device->features & PPS_PARALLEL)
 651                                 s[i++] = "Parallel";
 652                         if (i == 0) {
 653                                 /*
 654                                  * Shouldn't happen: independent-only devices
 655                                  * shouldn't advertise this option at all.
 656                                  */
 657                                 return SR_ERR_NA;
 658                         }
 659                         *data = g_variant_new_strv(s, i);
 660                         break;
 661                 default:
 662                         return SR_ERR_NA;
 663                 }
 664         } else {
 665                 /*
 666                  * Per-channel-group options depending on a channel are actually
 667                  * done with the first channel. Channel groups in PPS can have
 668                  * more than one channel, but they will typically be of equal
 669                  * specification for use in series or parallel mode.
 670                  */
 671                 ch = cg->channels->data;
 672                 if (!devc || !devc->device)
 673                         return SR_ERR_ARG;
 674                 ch_spec = &(devc->device->channels[ch->index]);
 675
 676                 switch (key) {
 677                 case SR_CONF_DEVICE_OPTIONS:
 678                         *data = std_gvar_array_u32(devc->device->devopts_cg, devc->device->num_devopts_cg);
 679                         break;
 680                 case SR_CONF_VOLTAGE_TARGET:
 681                         *data = std_gvar_min_max_step_array(ch_spec->voltage);
 682                         break;
 683                 case SR_CONF_OUTPUT_FREQUENCY_TARGET:
 684                         *data = std_gvar_min_max_step_array(ch_spec->frequency);
 685                         break;
 686                 case SR_CONF_CURRENT_LIMIT:
 687                         *data = std_gvar_min_max_step_array(ch_spec->current);
 688                         break;
 689                 case SR_CONF_OVER_VOLTAGE_PROTECTION_THRESHOLD:
 690                         *data = std_gvar_min_max_step_array(ch_spec->ovp);
 691                         break;
 692                 case SR_CONF_OVER_CURRENT_PROTECTION_THRESHOLD:
 693                         *data = std_gvar_min_max_step_array(ch_spec->ocp);
 694                         break;
 695                 default:
 696                         return SR_ERR_NA;
 697                 }
 698         }
 699
 700         return SR_OK;
 701 }
 702
 703 static int dev_acquisition_start(const struct sr_dev_inst *sdi)
 704 {
 705         struct dev_context *devc;
 706         struct sr_scpi_dev_inst *scpi;
 707         int ret;
 708
 709         devc = sdi->priv;
 710         scpi = sdi->conn;
 711
 712         /* Prime the pipe with the first channel. */
 713         devc->cur_acquisition_channel = sr_next_enabled_channel(sdi, NULL);
 714
 715         /* Device specific initialization before aquisition starts. */
 716         if (devc->device->init_aquisition)
 717                 devc->device->init_aquisition(sdi);
 718
 719         if ((ret = sr_scpi_source_add(sdi->session, scpi, G_IO_IN, 10,
 720                         scpi_pps_receive_data, (void *)sdi)) != SR_OK)
 721                 return ret;
 722         std_session_send_df_header(sdi);
 723         sr_sw_limits_acquisition_start(&devc->limits);
 724
 725         return SR_OK;
 726 }
 727
 728 static int dev_acquisition_stop(struct sr_dev_inst *sdi)
 729 {
 730         struct sr_scpi_dev_inst *scpi;
 731
 732         scpi = sdi->conn;
 733
 734         sr_scpi_source_remove(sdi->session, scpi);
 735
 736         std_session_send_df_end(sdi);
 737
 738         return SR_OK;
 739 }
 740
 741 static struct sr_dev_driver scpi_pps_driver_info = {
 742         .name = "scpi-pps",
 743         .longname = "SCPI PPS",
 744         .api_version = 1,
 745         .init = std_init,
 746         .cleanup = std_cleanup,
 747         .scan = scan_scpi_pps,
 748         .dev_list = std_dev_list,
 749         .dev_clear = dev_clear,
 750         .config_get = config_get,
 751         .config_set = config_set,
 752         .config_list = config_list,
 753         .dev_open = dev_open,
 754         .dev_close = dev_close,
 755         .dev_acquisition_start = dev_acquisition_start,
 756         .dev_acquisition_stop = dev_acquisition_stop,
 757         .context = NULL,
 758 };
 759
 760 static struct sr_dev_driver hp_ib_pps_driver_info = {
 761         .name = "hpib-pps",
 762         .longname = "HP-IB PPS",
 763         .api_version = 1,
 764         .init = std_init,
 765         .cleanup = std_cleanup,
 766         .scan = scan_hpib_pps,
 767         .dev_list = std_dev_list,
 768         .dev_clear = dev_clear,
 769         .config_get = config_get,
 770         .config_set = config_set,
 771         .config_list = config_list,
 772         .dev_open = dev_open,
 773         .dev_close = dev_close,
 774         .dev_acquisition_start = dev_acquisition_start,
 775         .dev_acquisition_stop = dev_acquisition_stop,
 776         .context = NULL,
 777 };
 778 SR_REGISTER_DEV_DRIVER(scpi_pps_driver_info);
 779 SR_REGISTER_DEV_DRIVER(hp_ib_pps_driver_info);