src/hardware/hameg-hmo/api.c

   1 /*
   2  * This file is part of the libsigrok project.
   3  *
   4  * Copyright (C) 2013 poljar (Damir Jelić) <poljarinho@gmail.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 <stdlib.h>
  22 #include "scpi.h"
  23 #include "protocol.h"
  24
  25 #define SERIALCOMM "115200/8n1/flow=1"
  26
  27 static struct sr_dev_driver hameg_hmo_driver_info;
  28
  29 static const char *manufacturers[] = {
  30         "HAMEG",
  31         "Rohde&Schwarz",
  32 };
  33
  34 static const uint32_t drvopts[] = {
  35         SR_CONF_OSCILLOSCOPE,
  36 };
  37
  38 static const uint32_t scanopts[] = {
  39         SR_CONF_CONN,
  40         SR_CONF_SERIALCOMM,
  41 };
  42
  43 enum {
  44         CG_INVALID = -1,
  45         CG_NONE,
  46         CG_ANALOG,
  47         CG_DIGITAL,
  48 };
  49
  50 static int check_manufacturer(const char *manufacturer)
  51 {
  52         unsigned int i;
  53
  54         for (i = 0; i < ARRAY_SIZE(manufacturers); i++)
  55                 if (!strcmp(manufacturer, manufacturers[i]))
  56                         return SR_OK;
  57
  58         return SR_ERR;
  59 }
  60
  61 static struct sr_dev_inst *hmo_probe_serial_device(struct sr_scpi_dev_inst *scpi)
  62 {
  63         struct sr_dev_inst *sdi;
  64         struct dev_context *devc;
  65         struct sr_scpi_hw_info *hw_info;
  66
  67         sdi = NULL;
  68         devc = NULL;
  69         hw_info = NULL;
  70
  71         if (sr_scpi_get_hw_id(scpi, &hw_info) != SR_OK) {
  72                 sr_info("Couldn't get IDN response.");
  73                 goto fail;
  74         }
  75
  76         if (check_manufacturer(hw_info->manufacturer) != SR_OK)
  77                 goto fail;
  78
  79         sdi = g_malloc0(sizeof(struct sr_dev_inst));
  80         sdi->vendor = g_strdup(hw_info->manufacturer);
  81         sdi->model = g_strdup(hw_info->model);
  82         sdi->version = g_strdup(hw_info->firmware_version);
  83         sdi->serial_num = g_strdup(hw_info->serial_number);
  84         sdi->driver = &hameg_hmo_driver_info;
  85         sdi->inst_type = SR_INST_SCPI;
  86         sdi->conn = scpi;
  87
  88         sr_scpi_hw_info_free(hw_info);
  89         hw_info = NULL;
  90
  91         devc = g_malloc0(sizeof(struct dev_context));
  92
  93         sdi->priv = devc;
  94
  95         if (hmo_init_device(sdi) != SR_OK)
  96                 goto fail;
  97
  98         return sdi;
  99
 100 fail:
 101         if (hw_info)
 102                 sr_scpi_hw_info_free(hw_info);
 103         if (sdi)
 104                 sr_dev_inst_free(sdi);
 105         g_free(devc);
 106
 107         return NULL;
 108 }
 109
 110 static GSList *scan(struct sr_dev_driver *di, GSList *options)
 111 {
 112         return sr_scpi_scan(di->context, options, hmo_probe_serial_device);
 113 }
 114
 115 static void clear_helper(void *priv)
 116 {
 117         struct dev_context *devc;
 118
 119         devc = priv;
 120
 121         hmo_scope_state_free(devc->model_state);
 122
 123         g_free(devc->analog_groups);
 124         g_free(devc->digital_groups);
 125
 126         g_free(devc);
 127 }
 128
 129 static int dev_clear(const struct sr_dev_driver *di)
 130 {
 131         return std_dev_clear(di, clear_helper);
 132 }
 133
 134 static int dev_open(struct sr_dev_inst *sdi)
 135 {
 136         if (sdi->status != SR_ST_ACTIVE && sr_scpi_open(sdi->conn) != SR_OK)
 137                 return SR_ERR;
 138
 139         if (hmo_scope_state_get(sdi) != SR_OK)
 140                 return SR_ERR;
 141
 142         sdi->status = SR_ST_ACTIVE;
 143
 144         return SR_OK;
 145 }
 146
 147 static int dev_close(struct sr_dev_inst *sdi)
 148 {
 149         if (sdi->status == SR_ST_INACTIVE)
 150                 return SR_OK;
 151
 152         sr_scpi_close(sdi->conn);
 153
 154         sdi->status = SR_ST_INACTIVE;
 155
 156         return SR_OK;
 157 }
 158
 159 static int check_channel_group(struct dev_context *devc,
 160                              const struct sr_channel_group *cg)
 161 {
 162         unsigned int i;
 163         const struct scope_config *model;
 164
 165         model = devc->model_config;
 166
 167         if (!cg)
 168                 return CG_NONE;
 169
 170         for (i = 0; i < model->analog_channels; i++)
 171                 if (cg == devc->analog_groups[i])
 172                         return CG_ANALOG;
 173
 174         for (i = 0; i < model->digital_pods; i++)
 175                 if (cg == devc->digital_groups[i])
 176                         return CG_DIGITAL;
 177
 178         sr_err("Invalid channel group specified.");
 179
 180         return CG_INVALID;
 181 }
 182
 183 static int config_get(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
 184                       const struct sr_channel_group *cg)
 185 {
 186         int ret, cg_type;
 187         unsigned int i;
 188         struct dev_context *devc;
 189         const struct scope_config *model;
 190         struct scope_state *state;
 191
 192         if (!sdi)
 193                 return SR_ERR_ARG;
 194
 195         devc = sdi->priv;
 196
 197         if ((cg_type = check_channel_group(devc, cg)) == CG_INVALID)
 198                 return SR_ERR;
 199
 200         ret = SR_ERR_NA;
 201         model = devc->model_config;
 202         state = devc->model_state;
 203
 204         switch (key) {
 205         case SR_CONF_NUM_HDIV:
 206                 *data = g_variant_new_int32(model->num_xdivs);
 207                 ret = SR_OK;
 208                 break;
 209         case SR_CONF_TIMEBASE:
 210                 *data = g_variant_new("(tt)", (*model->timebases)[state->timebase][0],
 211                                       (*model->timebases)[state->timebase][1]);
 212                 ret = SR_OK;
 213                 break;
 214         case SR_CONF_NUM_VDIV:
 215                 if (cg_type == CG_NONE) {
 216                         sr_err("No channel group specified.");
 217                         return SR_ERR_CHANNEL_GROUP;
 218                 } else if (cg_type == CG_ANALOG) {
 219                         for (i = 0; i < model->analog_channels; i++) {
 220                                 if (cg != devc->analog_groups[i])
 221                                         continue;
 222                                 *data = g_variant_new_int32(model->num_ydivs);
 223                                 ret = SR_OK;
 224                                 break;
 225                         }
 226
 227                 } else {
 228                         ret = SR_ERR_NA;
 229                 }
 230                 break;
 231         case SR_CONF_VDIV:
 232                 if (cg_type == CG_NONE) {
 233                         sr_err("No channel group specified.");
 234                         return SR_ERR_CHANNEL_GROUP;
 235                 } else if (cg_type == CG_ANALOG) {
 236                         for (i = 0; i < model->analog_channels; i++) {
 237                                 if (cg != devc->analog_groups[i])
 238                                         continue;
 239                                 *data = g_variant_new("(tt)",
 240                                                       (*model->vdivs)[state->analog_channels[i].vdiv][0],
 241                                                       (*model->vdivs)[state->analog_channels[i].vdiv][1]);
 242                                 ret = SR_OK;
 243                                 break;
 244                         }
 245
 246                 } else {
 247                         ret = SR_ERR_NA;
 248                 }
 249                 break;
 250         case SR_CONF_TRIGGER_SOURCE:
 251                 *data = g_variant_new_string((*model->trigger_sources)[state->trigger_source]);
 252                 ret = SR_OK;
 253                 break;
 254         case SR_CONF_TRIGGER_SLOPE:
 255                 *data = g_variant_new_string((*model->trigger_slopes)[state->trigger_slope]);
 256                 ret = SR_OK;
 257                 break;
 258         case SR_CONF_HORIZ_TRIGGERPOS:
 259                 *data = g_variant_new_double(state->horiz_triggerpos);
 260                 ret = SR_OK;
 261                 break;
 262         case SR_CONF_COUPLING:
 263                 if (cg_type == CG_NONE) {
 264                         sr_err("No channel group specified.");
 265                         return SR_ERR_CHANNEL_GROUP;
 266                 } else if (cg_type == CG_ANALOG) {
 267                         for (i = 0; i < model->analog_channels; i++) {
 268                                 if (cg != devc->analog_groups[i])
 269                                         continue;
 270                                 *data = g_variant_new_string((*model->coupling_options)[state->analog_channels[i].coupling]);
 271                                 ret = SR_OK;
 272                                 break;
 273                         }
 274
 275                 } else {
 276                         ret = SR_ERR_NA;
 277                 }
 278                 break;
 279         case SR_CONF_SAMPLERATE:
 280                 *data = g_variant_new_uint64(state->sample_rate);
 281                 ret = SR_OK;
 282                 break;
 283         default:
 284                 ret = SR_ERR_NA;
 285         }
 286
 287         return ret;
 288 }
 289
 290 static GVariant *build_tuples(const uint64_t (*array)[][2], unsigned int n)
 291 {
 292         unsigned int i;
 293         GVariant *rational[2];
 294         GVariantBuilder gvb;
 295
 296         g_variant_builder_init(&gvb, G_VARIANT_TYPE_ARRAY);
 297
 298         for (i = 0; i < n; i++) {
 299                 rational[0] = g_variant_new_uint64((*array)[i][0]);
 300                 rational[1] = g_variant_new_uint64((*array)[i][1]);
 301
 302                 /* FIXME: Valgrind reports a memory leak here. */
 303                 g_variant_builder_add_value(&gvb, g_variant_new_tuple(rational, 2));
 304         }
 305
 306         return g_variant_builder_end(&gvb);
 307 }
 308
 309 static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sdi,
 310                       const struct sr_channel_group *cg)
 311 {
 312         int ret, cg_type;
 313         unsigned int i, j;
 314         char command[MAX_COMMAND_SIZE], float_str[30];
 315         struct dev_context *devc;
 316         const struct scope_config *model;
 317         struct scope_state *state;
 318         const char *tmp;
 319         uint64_t p, q;
 320         double tmp_d;
 321         gboolean update_sample_rate;
 322
 323         if (!sdi)
 324                 return SR_ERR_ARG;
 325
 326         devc = sdi->priv;
 327
 328         if ((cg_type = check_channel_group(devc, cg)) == CG_INVALID)
 329                 return SR_ERR;
 330
 331         model = devc->model_config;
 332         state = devc->model_state;
 333         update_sample_rate = FALSE;
 334
 335         ret = SR_ERR_NA;
 336
 337         switch (key) {
 338         case SR_CONF_LIMIT_FRAMES:
 339                 devc->frame_limit = g_variant_get_uint64(data);
 340                 ret = SR_OK;
 341                 break;
 342         case SR_CONF_TRIGGER_SOURCE:
 343                 tmp = g_variant_get_string(data, NULL);
 344                 for (i = 0; (*model->trigger_sources)[i]; i++) {
 345                         if (g_strcmp0(tmp, (*model->trigger_sources)[i]) != 0)
 346                                 continue;
 347                         state->trigger_source = i;
 348                         g_snprintf(command, sizeof(command),
 349                                    (*model->scpi_dialect)[SCPI_CMD_SET_TRIGGER_SOURCE],
 350                                    (*model->trigger_sources)[i]);
 351
 352                         ret = sr_scpi_send(sdi->conn, command);
 353                         break;
 354                 }
 355                 break;
 356         case SR_CONF_VDIV:
 357                 if (cg_type == CG_NONE) {
 358                         sr_err("No channel group specified.");
 359                         return SR_ERR_CHANNEL_GROUP;
 360                 }
 361
 362                 g_variant_get(data, "(tt)", &p, &q);
 363
 364                 for (i = 0; i < model->num_vdivs; i++) {
 365                         if (p != (*model->vdivs)[i][0] ||
 366                             q != (*model->vdivs)[i][1])
 367                                 continue;
 368                         for (j = 1; j <= model->analog_channels; j++) {
 369                                 if (cg != devc->analog_groups[j - 1])
 370                                         continue;
 371                                 state->analog_channels[j - 1].vdiv = i;
 372                                 g_ascii_formatd(float_str, sizeof(float_str), "%E", (float) p / q);
 373                                 g_snprintf(command, sizeof(command),
 374                                            (*model->scpi_dialect)[SCPI_CMD_SET_VERTICAL_DIV],
 375                                            j, float_str);
 376
 377                                 if (sr_scpi_send(sdi->conn, command) != SR_OK ||
 378                                     sr_scpi_get_opc(sdi->conn) != SR_OK)
 379                                         return SR_ERR;
 380
 381                                 break;
 382                         }
 383
 384                         ret = SR_OK;
 385                         break;
 386                 }
 387                 break;
 388         case SR_CONF_TIMEBASE:
 389                 g_variant_get(data, "(tt)", &p, &q);
 390
 391                 for (i = 0; i < model->num_timebases; i++) {
 392                         if (p != (*model->timebases)[i][0] ||
 393                             q != (*model->timebases)[i][1])
 394                                 continue;
 395                         state->timebase = i;
 396                         g_ascii_formatd(float_str, sizeof(float_str), "%E", (float) p / q);
 397                         g_snprintf(command, sizeof(command),
 398                                    (*model->scpi_dialect)[SCPI_CMD_SET_TIMEBASE],
 399                                    float_str);
 400
 401                         ret = sr_scpi_send(sdi->conn, command);
 402                         update_sample_rate = TRUE;
 403                         break;
 404                 }
 405                 break;
 406         case SR_CONF_HORIZ_TRIGGERPOS:
 407                 tmp_d = g_variant_get_double(data);
 408
 409                 if (tmp_d < 0.0 || tmp_d > 1.0)
 410                         return SR_ERR;
 411
 412                 state->horiz_triggerpos = tmp_d;
 413                 tmp_d = -(tmp_d - 0.5) *
 414                         ((double) (*model->timebases)[state->timebase][0] /
 415                         (*model->timebases)[state->timebase][1])
 416                          * model->num_xdivs;
 417
 418                 g_ascii_formatd(float_str, sizeof(float_str), "%E", tmp_d);
 419                 g_snprintf(command, sizeof(command),
 420                            (*model->scpi_dialect)[SCPI_CMD_SET_HORIZ_TRIGGERPOS],
 421                            float_str);
 422
 423                 ret = sr_scpi_send(sdi->conn, command);
 424                 break;
 425         case SR_CONF_TRIGGER_SLOPE:
 426                 tmp = g_variant_get_string(data, NULL);
 427                 for (i = 0; (*model->trigger_slopes)[i]; i++) {
 428                         if (g_strcmp0(tmp, (*model->trigger_slopes)[i]) != 0)
 429                                 continue;
 430                         state->trigger_slope = i;
 431                         g_snprintf(command, sizeof(command),
 432                                    (*model->scpi_dialect)[SCPI_CMD_SET_TRIGGER_SLOPE],
 433                                    (*model->trigger_slopes)[i]);
 434
 435                         ret = sr_scpi_send(sdi->conn, command);
 436                         break;
 437                 }
 438                 break;
 439         case SR_CONF_COUPLING:
 440                 if (cg_type == CG_NONE) {
 441                         sr_err("No channel group specified.");
 442                         return SR_ERR_CHANNEL_GROUP;
 443                 }
 444
 445                 tmp = g_variant_get_string(data, NULL);
 446
 447                 for (i = 0; (*model->coupling_options)[i]; i++) {
 448                         if (strcmp(tmp, (*model->coupling_options)[i]) != 0)
 449                                 continue;
 450                         for (j = 1; j <= model->analog_channels; j++) {
 451                                 if (cg != devc->analog_groups[j - 1])
 452                                         continue;
 453                                 state->analog_channels[j-1].coupling = i;
 454
 455                                 g_snprintf(command, sizeof(command),
 456                                            (*model->scpi_dialect)[SCPI_CMD_SET_COUPLING],
 457                                            j, tmp);
 458
 459                                 if (sr_scpi_send(sdi->conn, command) != SR_OK ||
 460                                     sr_scpi_get_opc(sdi->conn) != SR_OK)
 461                                         return SR_ERR;
 462                                 break;
 463                         }
 464
 465                         ret = SR_OK;
 466                         break;
 467                 }
 468                 break;
 469         default:
 470                 ret = SR_ERR_NA;
 471                 break;
 472         }
 473
 474         if (ret == SR_OK)
 475                 ret = sr_scpi_get_opc(sdi->conn);
 476
 477         if (ret == SR_OK && update_sample_rate)
 478                 ret = hmo_update_sample_rate(sdi);
 479
 480         return ret;
 481 }
 482
 483 static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
 484                        const struct sr_channel_group *cg)
 485 {
 486         int cg_type = CG_NONE;
 487         struct dev_context *devc = NULL;
 488         const struct scope_config *model = NULL;
 489
 490         if (sdi) {
 491                 devc = sdi->priv;
 492                 if ((cg_type = check_channel_group(devc, cg)) == CG_INVALID)
 493                         return SR_ERR;
 494
 495                 model = devc->model_config;
 496         }
 497
 498         switch (key) {
 499         case SR_CONF_SCAN_OPTIONS:
 500                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 501                                 scanopts, ARRAY_SIZE(scanopts), sizeof(uint32_t));
 502                 break;
 503         case SR_CONF_DEVICE_OPTIONS:
 504                 if (cg_type == CG_NONE) {
 505                         if (model)
 506                                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 507                                         model->devopts, model->num_devopts, sizeof(uint32_t));
 508                         else
 509                                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 510                                         drvopts, ARRAY_SIZE(drvopts), sizeof(uint32_t));
 511                 } else if (cg_type == CG_ANALOG) {
 512                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 513                                 model->analog_devopts, model->num_analog_devopts,
 514                                 sizeof(uint32_t));
 515                 } else {
 516                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 517                                 NULL, 0, sizeof(uint32_t));
 518                 }
 519                 break;
 520         case SR_CONF_COUPLING:
 521                 if (cg_type == CG_NONE)
 522                         return SR_ERR_CHANNEL_GROUP;
 523                 *data = g_variant_new_strv(*model->coupling_options,
 524                            g_strv_length((char **)*model->coupling_options));
 525                 break;
 526         case SR_CONF_TRIGGER_SOURCE:
 527                 if (!model)
 528                         return SR_ERR_ARG;
 529                 *data = g_variant_new_strv(*model->trigger_sources,
 530                            g_strv_length((char **)*model->trigger_sources));
 531                 break;
 532         case SR_CONF_TRIGGER_SLOPE:
 533                 if (!model)
 534                         return SR_ERR_ARG;
 535                 *data = g_variant_new_strv(*model->trigger_slopes,
 536                            g_strv_length((char **)*model->trigger_slopes));
 537                 break;
 538         case SR_CONF_TIMEBASE:
 539                 if (!model)
 540                         return SR_ERR_ARG;
 541                 *data = build_tuples(model->timebases, model->num_timebases);
 542                 break;
 543         case SR_CONF_VDIV:
 544                 if (cg_type == CG_NONE)
 545                         return SR_ERR_CHANNEL_GROUP;
 546                 *data = build_tuples(model->vdivs, model->num_vdivs);
 547                 break;
 548         default:
 549                 return SR_ERR_NA;
 550         }
 551
 552         return SR_OK;
 553 }
 554
 555 SR_PRIV int hmo_request_data(const struct sr_dev_inst *sdi)
 556 {
 557         char command[MAX_COMMAND_SIZE];
 558         struct sr_channel *ch;
 559         struct dev_context *devc;
 560         const struct scope_config *model;
 561
 562         devc = sdi->priv;
 563         model = devc->model_config;
 564
 565         ch = devc->current_channel->data;
 566
 567         switch (ch->type) {
 568         case SR_CHANNEL_ANALOG:
 569                 g_snprintf(command, sizeof(command),
 570                            (*model->scpi_dialect)[SCPI_CMD_GET_ANALOG_DATA],
 571                            ch->index + 1);
 572                 break;
 573         case SR_CHANNEL_LOGIC:
 574                 g_snprintf(command, sizeof(command),
 575                            (*model->scpi_dialect)[SCPI_CMD_GET_DIG_DATA],
 576                            ch->index < 8 ? 1 : 2);
 577                 break;
 578         default:
 579                 sr_err("Invalid channel type.");
 580                 break;
 581         }
 582
 583         return sr_scpi_send(sdi->conn, command);
 584 }
 585
 586 static int hmo_check_channels(GSList *channels)
 587 {
 588         GSList *l;
 589         struct sr_channel *ch;
 590         gboolean enabled_pod1, enabled_pod2, enabled_chan3, enabled_chan4;
 591
 592         enabled_pod1 = enabled_pod2 = enabled_chan3 = enabled_chan4 = FALSE;
 593
 594         for (l = channels; l; l = l->next) {
 595                 ch = l->data;
 596                 switch (ch->type) {
 597                 case SR_CHANNEL_ANALOG:
 598                         if (ch->index == 2)
 599                                 enabled_chan3 = TRUE;
 600                         else if (ch->index == 3)
 601                                 enabled_chan4 = TRUE;
 602                         break;
 603                 case SR_CHANNEL_LOGIC:
 604                         if (ch->index < 8)
 605                                 enabled_pod1 = TRUE;
 606                         else
 607                                 enabled_pod2 = TRUE;
 608                         break;
 609                 default:
 610                         return SR_ERR;
 611                 }
 612         }
 613
 614         if ((enabled_pod1 && enabled_chan3) ||
 615             (enabled_pod2 && enabled_chan4))
 616                 return SR_ERR;
 617
 618         return SR_OK;
 619 }
 620
 621 static int hmo_setup_channels(const struct sr_dev_inst *sdi)
 622 {
 623         GSList *l;
 624         unsigned int i;
 625         gboolean *pod_enabled, setup_changed;
 626         char command[MAX_COMMAND_SIZE];
 627         struct scope_state *state;
 628         const struct scope_config *model;
 629         struct sr_channel *ch;
 630         struct dev_context *devc;
 631         struct sr_scpi_dev_inst *scpi;
 632
 633         devc = sdi->priv;
 634         scpi = sdi->conn;
 635         state = devc->model_state;
 636         model = devc->model_config;
 637         setup_changed = FALSE;
 638
 639         pod_enabled = g_try_malloc0(sizeof(gboolean) * model->digital_pods);
 640
 641         for (l = sdi->channels; l; l = l->next) {
 642                 ch = l->data;
 643                 switch (ch->type) {
 644                 case SR_CHANNEL_ANALOG:
 645                         if (ch->enabled == state->analog_channels[ch->index].state)
 646                                 break;
 647                         g_snprintf(command, sizeof(command),
 648                                    (*model->scpi_dialect)[SCPI_CMD_SET_ANALOG_CHAN_STATE],
 649                                    ch->index + 1, ch->enabled);
 650
 651                         if (sr_scpi_send(scpi, command) != SR_OK)
 652                                 return SR_ERR;
 653                         state->analog_channels[ch->index].state = ch->enabled;
 654                         setup_changed = TRUE;
 655                         break;
 656                 case SR_CHANNEL_LOGIC:
 657                         /*
 658                          * A digital POD needs to be enabled for every group of
 659                          * 8 channels.
 660                          */
 661                         if (ch->enabled)
 662                                 pod_enabled[ch->index < 8 ? 0 : 1] = TRUE;
 663
 664                         if (ch->enabled == state->digital_channels[ch->index])
 665                                 break;
 666                         g_snprintf(command, sizeof(command),
 667                                    (*model->scpi_dialect)[SCPI_CMD_SET_DIG_CHAN_STATE],
 668                                    ch->index, ch->enabled);
 669
 670                         if (sr_scpi_send(scpi, command) != SR_OK)
 671                                 return SR_ERR;
 672
 673                         state->digital_channels[ch->index] = ch->enabled;
 674                         setup_changed = TRUE;
 675                         break;
 676                 default:
 677                         return SR_ERR;
 678                 }
 679         }
 680
 681         for (i = 1; i <= model->digital_pods; i++) {
 682                 if (state->digital_pods[i - 1] == pod_enabled[i - 1])
 683                         continue;
 684                 g_snprintf(command, sizeof(command),
 685                            (*model->scpi_dialect)[SCPI_CMD_SET_DIG_POD_STATE],
 686                            i, pod_enabled[i - 1]);
 687                 if (sr_scpi_send(scpi, command) != SR_OK)
 688                         return SR_ERR;
 689                 state->digital_pods[i - 1] = pod_enabled[i - 1];
 690                 setup_changed = TRUE;
 691         }
 692
 693         g_free(pod_enabled);
 694
 695         if (setup_changed && hmo_update_sample_rate(sdi) != SR_OK)
 696                 return SR_ERR;
 697
 698         return SR_OK;
 699 }
 700
 701 static int dev_acquisition_start(const struct sr_dev_inst *sdi)
 702 {
 703         GSList *l;
 704         gboolean digital_added;
 705         struct sr_channel *ch;
 706         struct dev_context *devc;
 707         struct sr_scpi_dev_inst *scpi;
 708
 709         if (sdi->status != SR_ST_ACTIVE)
 710                 return SR_ERR_DEV_CLOSED;
 711
 712         scpi = sdi->conn;
 713         devc = sdi->priv;
 714         digital_added = FALSE;
 715
 716         g_slist_free(devc->enabled_channels);
 717         devc->enabled_channels = NULL;
 718
 719         for (l = sdi->channels; l; l = l->next) {
 720                 ch = l->data;
 721                 if (!ch->enabled)
 722                         continue;
 723                 /* Only add a single digital channel. */
 724                 if (ch->type != SR_CHANNEL_LOGIC || !digital_added) {
 725                         devc->enabled_channels = g_slist_append(
 726                                         devc->enabled_channels, ch);
 727                         if (ch->type == SR_CHANNEL_LOGIC)
 728                                 digital_added = TRUE;
 729                 }
 730         }
 731
 732         if (!devc->enabled_channels)
 733                 return SR_ERR;
 734
 735         if (hmo_check_channels(devc->enabled_channels) != SR_OK) {
 736                 sr_err("Invalid channel configuration specified!");
 737                 return SR_ERR_NA;
 738         }
 739
 740         if (hmo_setup_channels(sdi) != SR_OK) {
 741                 sr_err("Failed to setup channel configuration!");
 742                 return SR_ERR;
 743         }
 744
 745         sr_scpi_source_add(sdi->session, scpi, G_IO_IN, 50,
 746                         hmo_receive_data, (void *)sdi);
 747
 748         std_session_send_df_header(sdi, LOG_PREFIX);
 749
 750         devc->current_channel = devc->enabled_channels;
 751
 752         return hmo_request_data(sdi);
 753 }
 754
 755 static int dev_acquisition_stop(struct sr_dev_inst *sdi)
 756 {
 757         struct dev_context *devc;
 758         struct sr_scpi_dev_inst *scpi;
 759
 760         std_session_send_df_end(sdi, LOG_PREFIX);
 761
 762         if (sdi->status != SR_ST_ACTIVE)
 763                 return SR_ERR_DEV_CLOSED;
 764
 765         devc = sdi->priv;
 766
 767         devc->num_frames = 0;
 768         g_slist_free(devc->enabled_channels);
 769         devc->enabled_channels = NULL;
 770         scpi = sdi->conn;
 771         sr_scpi_source_remove(sdi->session, scpi);
 772
 773         return SR_OK;
 774 }
 775
 776 static struct sr_dev_driver hameg_hmo_driver_info = {
 777         .name = "hameg-hmo",
 778         .longname = "Hameg HMO",
 779         .api_version = 1,
 780         .init = std_init,
 781         .cleanup = std_cleanup,
 782         .scan = scan,
 783         .dev_list = std_dev_list,
 784         .dev_clear = dev_clear,
 785         .config_get = config_get,
 786         .config_set = config_set,
 787         .config_list = config_list,
 788         .dev_open = dev_open,
 789         .dev_close = dev_close,
 790         .dev_acquisition_start = dev_acquisition_start,
 791         .dev_acquisition_stop = dev_acquisition_stop,
 792         .context = NULL,
 793 };
 794 SR_REGISTER_DEV_DRIVER(hameg_hmo_driver_info);