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 SR_PRIV 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 || !(devc = sdi->priv))
 193                 return SR_ERR_ARG;
 194
 195         if ((cg_type = check_channel_group(devc, cg)) == CG_INVALID)
 196                 return SR_ERR;
 197
 198         ret = SR_ERR_NA;
 199         model = devc->model_config;
 200         state = devc->model_state;
 201
 202         switch (key) {
 203         case SR_CONF_NUM_HDIV:
 204                 *data = g_variant_new_int32(model->num_xdivs);
 205                 ret = SR_OK;
 206                 break;
 207         case SR_CONF_TIMEBASE:
 208                 *data = g_variant_new("(tt)", (*model->timebases)[state->timebase][0],
 209                                       (*model->timebases)[state->timebase][1]);
 210                 ret = SR_OK;
 211                 break;
 212         case SR_CONF_NUM_VDIV:
 213                 if (cg_type == CG_NONE) {
 214                         sr_err("No channel group specified.");
 215                         return SR_ERR_CHANNEL_GROUP;
 216                 } else if (cg_type == CG_ANALOG) {
 217                         for (i = 0; i < model->analog_channels; i++) {
 218                                 if (cg != devc->analog_groups[i])
 219                                         continue;
 220                                 *data = g_variant_new_int32(model->num_ydivs);
 221                                 ret = SR_OK;
 222                                 break;
 223                         }
 224
 225                 } else {
 226                         ret = SR_ERR_NA;
 227                 }
 228                 break;
 229         case SR_CONF_VDIV:
 230                 if (cg_type == CG_NONE) {
 231                         sr_err("No channel group specified.");
 232                         return SR_ERR_CHANNEL_GROUP;
 233                 } else if (cg_type == CG_ANALOG) {
 234                         for (i = 0; i < model->analog_channels; i++) {
 235                                 if (cg != devc->analog_groups[i])
 236                                         continue;
 237                                 *data = g_variant_new("(tt)",
 238                                                       (*model->vdivs)[state->analog_channels[i].vdiv][0],
 239                                                       (*model->vdivs)[state->analog_channels[i].vdiv][1]);
 240                                 ret = SR_OK;
 241                                 break;
 242                         }
 243
 244                 } else {
 245                         ret = SR_ERR_NA;
 246                 }
 247                 break;
 248         case SR_CONF_TRIGGER_SOURCE:
 249                 *data = g_variant_new_string((*model->trigger_sources)[state->trigger_source]);
 250                 ret = SR_OK;
 251                 break;
 252         case SR_CONF_TRIGGER_SLOPE:
 253                 *data = g_variant_new_string((*model->trigger_slopes)[state->trigger_slope]);
 254                 ret = SR_OK;
 255                 break;
 256         case SR_CONF_HORIZ_TRIGGERPOS:
 257                 *data = g_variant_new_double(state->horiz_triggerpos);
 258                 ret = SR_OK;
 259                 break;
 260         case SR_CONF_COUPLING:
 261                 if (cg_type == CG_NONE) {
 262                         sr_err("No channel group specified.");
 263                         return SR_ERR_CHANNEL_GROUP;
 264                 } else if (cg_type == CG_ANALOG) {
 265                         for (i = 0; i < model->analog_channels; i++) {
 266                                 if (cg != devc->analog_groups[i])
 267                                         continue;
 268                                 *data = g_variant_new_string((*model->coupling_options)[state->analog_channels[i].coupling]);
 269                                 ret = SR_OK;
 270                                 break;
 271                         }
 272
 273                 } else {
 274                         ret = SR_ERR_NA;
 275                 }
 276                 break;
 277         case SR_CONF_SAMPLERATE:
 278                 *data = g_variant_new_uint64(state->sample_rate);
 279                 ret = SR_OK;
 280                 break;
 281         default:
 282                 ret = SR_ERR_NA;
 283         }
 284
 285         return ret;
 286 }
 287
 288 static GVariant *build_tuples(const uint64_t (*array)[][2], unsigned int n)
 289 {
 290         unsigned int i;
 291         GVariant *rational[2];
 292         GVariantBuilder gvb;
 293
 294         g_variant_builder_init(&gvb, G_VARIANT_TYPE_ARRAY);
 295
 296         for (i = 0; i < n; i++) {
 297                 rational[0] = g_variant_new_uint64((*array)[i][0]);
 298                 rational[1] = g_variant_new_uint64((*array)[i][1]);
 299
 300                 /* FIXME: Valgrind reports a memory leak here. */
 301                 g_variant_builder_add_value(&gvb, g_variant_new_tuple(rational, 2));
 302         }
 303
 304         return g_variant_builder_end(&gvb);
 305 }
 306
 307 static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sdi,
 308                       const struct sr_channel_group *cg)
 309 {
 310         int ret, cg_type;
 311         unsigned int i, j;
 312         char command[MAX_COMMAND_SIZE], float_str[30];
 313         struct dev_context *devc;
 314         const struct scope_config *model;
 315         struct scope_state *state;
 316         const char *tmp;
 317         uint64_t p, q;
 318         double tmp_d;
 319         gboolean update_sample_rate;
 320
 321         if (!sdi)
 322                 return SR_ERR_ARG;
 323
 324         devc = sdi->priv;
 325
 326         if ((cg_type = check_channel_group(devc, cg)) == CG_INVALID)
 327                 return SR_ERR;
 328
 329         model = devc->model_config;
 330         state = devc->model_state;
 331         update_sample_rate = FALSE;
 332
 333         ret = SR_ERR_NA;
 334
 335         switch (key) {
 336         case SR_CONF_LIMIT_FRAMES:
 337                 devc->frame_limit = g_variant_get_uint64(data);
 338                 ret = SR_OK;
 339                 break;
 340         case SR_CONF_TRIGGER_SOURCE:
 341                 tmp = g_variant_get_string(data, NULL);
 342                 for (i = 0; (*model->trigger_sources)[i]; i++) {
 343                         if (g_strcmp0(tmp, (*model->trigger_sources)[i]) != 0)
 344                                 continue;
 345                         state->trigger_source = i;
 346                         g_snprintf(command, sizeof(command),
 347                                    (*model->scpi_dialect)[SCPI_CMD_SET_TRIGGER_SOURCE],
 348                                    (*model->trigger_sources)[i]);
 349
 350                         ret = sr_scpi_send(sdi->conn, command);
 351                         break;
 352                 }
 353                 break;
 354         case SR_CONF_VDIV:
 355                 if (cg_type == CG_NONE) {
 356                         sr_err("No channel group specified.");
 357                         return SR_ERR_CHANNEL_GROUP;
 358                 }
 359
 360                 g_variant_get(data, "(tt)", &p, &q);
 361
 362                 for (i = 0; i < model->num_vdivs; i++) {
 363                         if (p != (*model->vdivs)[i][0] ||
 364                             q != (*model->vdivs)[i][1])
 365                                 continue;
 366                         for (j = 1; j <= model->analog_channels; j++) {
 367                                 if (cg != devc->analog_groups[j - 1])
 368                                         continue;
 369                                 state->analog_channels[j - 1].vdiv = i;
 370                                 g_ascii_formatd(float_str, sizeof(float_str), "%E", (float) p / q);
 371                                 g_snprintf(command, sizeof(command),
 372                                            (*model->scpi_dialect)[SCPI_CMD_SET_VERTICAL_DIV],
 373                                            j, float_str);
 374
 375                                 if (sr_scpi_send(sdi->conn, command) != SR_OK ||
 376                                     sr_scpi_get_opc(sdi->conn) != SR_OK)
 377                                         return SR_ERR;
 378
 379                                 break;
 380                         }
 381
 382                         ret = SR_OK;
 383                         break;
 384                 }
 385                 break;
 386         case SR_CONF_TIMEBASE:
 387                 g_variant_get(data, "(tt)", &p, &q);
 388
 389                 for (i = 0; i < model->num_timebases; i++) {
 390                         if (p != (*model->timebases)[i][0] ||
 391                             q != (*model->timebases)[i][1])
 392                                 continue;
 393                         state->timebase = i;
 394                         g_ascii_formatd(float_str, sizeof(float_str), "%E", (float) p / q);
 395                         g_snprintf(command, sizeof(command),
 396                                    (*model->scpi_dialect)[SCPI_CMD_SET_TIMEBASE],
 397                                    float_str);
 398
 399                         ret = sr_scpi_send(sdi->conn, command);
 400                         update_sample_rate = TRUE;
 401                         break;
 402                 }
 403                 break;
 404         case SR_CONF_HORIZ_TRIGGERPOS:
 405                 tmp_d = g_variant_get_double(data);
 406
 407                 if (tmp_d < 0.0 || tmp_d > 1.0)
 408                         return SR_ERR;
 409
 410                 state->horiz_triggerpos = tmp_d;
 411                 tmp_d = -(tmp_d - 0.5) *
 412                         ((double) (*model->timebases)[state->timebase][0] /
 413                         (*model->timebases)[state->timebase][1])
 414                          * model->num_xdivs;
 415
 416                 g_ascii_formatd(float_str, sizeof(float_str), "%E", tmp_d);
 417                 g_snprintf(command, sizeof(command),
 418                            (*model->scpi_dialect)[SCPI_CMD_SET_HORIZ_TRIGGERPOS],
 419                            float_str);
 420
 421                 ret = sr_scpi_send(sdi->conn, command);
 422                 break;
 423         case SR_CONF_TRIGGER_SLOPE:
 424                 tmp = g_variant_get_string(data, NULL);
 425                 for (i = 0; (*model->trigger_slopes)[i]; i++) {
 426                         if (g_strcmp0(tmp, (*model->trigger_slopes)[i]) != 0)
 427                                 continue;
 428                         state->trigger_slope = i;
 429                         g_snprintf(command, sizeof(command),
 430                                    (*model->scpi_dialect)[SCPI_CMD_SET_TRIGGER_SLOPE],
 431                                    (*model->trigger_slopes)[i]);
 432
 433                         ret = sr_scpi_send(sdi->conn, command);
 434                         break;
 435                 }
 436                 break;
 437         case SR_CONF_COUPLING:
 438                 if (cg_type == CG_NONE) {
 439                         sr_err("No channel group specified.");
 440                         return SR_ERR_CHANNEL_GROUP;
 441                 }
 442
 443                 tmp = g_variant_get_string(data, NULL);
 444
 445                 for (i = 0; (*model->coupling_options)[i]; i++) {
 446                         if (strcmp(tmp, (*model->coupling_options)[i]) != 0)
 447                                 continue;
 448                         for (j = 1; j <= model->analog_channels; j++) {
 449                                 if (cg != devc->analog_groups[j - 1])
 450                                         continue;
 451                                 state->analog_channels[j-1].coupling = i;
 452
 453                                 g_snprintf(command, sizeof(command),
 454                                            (*model->scpi_dialect)[SCPI_CMD_SET_COUPLING],
 455                                            j, tmp);
 456
 457                                 if (sr_scpi_send(sdi->conn, command) != SR_OK ||
 458                                     sr_scpi_get_opc(sdi->conn) != SR_OK)
 459                                         return SR_ERR;
 460                                 break;
 461                         }
 462
 463                         ret = SR_OK;
 464                         break;
 465                 }
 466                 break;
 467         default:
 468                 ret = SR_ERR_NA;
 469                 break;
 470         }
 471
 472         if (ret == SR_OK)
 473                 ret = sr_scpi_get_opc(sdi->conn);
 474
 475         if (ret == SR_OK && update_sample_rate)
 476                 ret = hmo_update_sample_rate(sdi);
 477
 478         return ret;
 479 }
 480
 481 static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
 482                        const struct sr_channel_group *cg)
 483 {
 484         int cg_type = CG_NONE;
 485         struct dev_context *devc = NULL;
 486         const struct scope_config *model = NULL;
 487
 488         if (sdi && (devc = sdi->priv)) {
 489                 if ((cg_type = check_channel_group(devc, cg)) == CG_INVALID)
 490                         return SR_ERR;
 491
 492                 model = devc->model_config;
 493         }
 494
 495         switch (key) {
 496         case SR_CONF_SCAN_OPTIONS:
 497                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 498                                 scanopts, ARRAY_SIZE(scanopts), sizeof(uint32_t));
 499                 break;
 500         case SR_CONF_DEVICE_OPTIONS:
 501                 if (cg_type == CG_NONE) {
 502                         if (model)
 503                                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 504                                         model->devopts, model->num_devopts, sizeof(uint32_t));
 505                         else
 506                                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 507                                         drvopts, ARRAY_SIZE(drvopts), sizeof(uint32_t));
 508                 } else if (cg_type == CG_ANALOG) {
 509                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 510                                 model->analog_devopts, model->num_analog_devopts,
 511                                 sizeof(uint32_t));
 512                 } else {
 513                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 514                                 NULL, 0, sizeof(uint32_t));
 515                 }
 516                 break;
 517         case SR_CONF_COUPLING:
 518                 if (cg_type == CG_NONE)
 519                         return SR_ERR_CHANNEL_GROUP;
 520                 *data = g_variant_new_strv(*model->coupling_options,
 521                            g_strv_length((char **)*model->coupling_options));
 522                 break;
 523         case SR_CONF_TRIGGER_SOURCE:
 524                 if (!model)
 525                         return SR_ERR_ARG;
 526                 *data = g_variant_new_strv(*model->trigger_sources,
 527                            g_strv_length((char **)*model->trigger_sources));
 528                 break;
 529         case SR_CONF_TRIGGER_SLOPE:
 530                 if (!model)
 531                         return SR_ERR_ARG;
 532                 *data = g_variant_new_strv(*model->trigger_slopes,
 533                            g_strv_length((char **)*model->trigger_slopes));
 534                 break;
 535         case SR_CONF_TIMEBASE:
 536                 if (!model)
 537                         return SR_ERR_ARG;
 538                 *data = build_tuples(model->timebases, model->num_timebases);
 539                 break;
 540         case SR_CONF_VDIV:
 541                 if (cg_type == CG_NONE)
 542                         return SR_ERR_CHANNEL_GROUP;
 543                 *data = build_tuples(model->vdivs, model->num_vdivs);
 544                 break;
 545         default:
 546                 return SR_ERR_NA;
 547         }
 548
 549         return SR_OK;
 550 }
 551
 552 SR_PRIV int hmo_request_data(const struct sr_dev_inst *sdi)
 553 {
 554         char command[MAX_COMMAND_SIZE];
 555         struct sr_channel *ch;
 556         struct dev_context *devc;
 557         const struct scope_config *model;
 558
 559         devc = sdi->priv;
 560         model = devc->model_config;
 561
 562         ch = devc->current_channel->data;
 563
 564         switch (ch->type) {
 565         case SR_CHANNEL_ANALOG:
 566                 g_snprintf(command, sizeof(command),
 567                            (*model->scpi_dialect)[SCPI_CMD_GET_ANALOG_DATA],
 568                            ch->index + 1);
 569                 break;
 570         case SR_CHANNEL_LOGIC:
 571                 g_snprintf(command, sizeof(command),
 572                            (*model->scpi_dialect)[SCPI_CMD_GET_DIG_DATA],
 573                            ch->index < 8 ? 1 : 2);
 574                 break;
 575         default:
 576                 sr_err("Invalid channel type.");
 577                 break;
 578         }
 579
 580         return sr_scpi_send(sdi->conn, command);
 581 }
 582
 583 static int hmo_check_channels(GSList *channels)
 584 {
 585         GSList *l;
 586         struct sr_channel *ch;
 587         gboolean enabled_pod1, enabled_pod2, enabled_chan3, enabled_chan4;
 588
 589         enabled_pod1 = enabled_pod2 = enabled_chan3 = enabled_chan4 = FALSE;
 590
 591         for (l = channels; l; l = l->next) {
 592                 ch = l->data;
 593                 switch (ch->type) {
 594                 case SR_CHANNEL_ANALOG:
 595                         if (ch->index == 2)
 596                                 enabled_chan3 = TRUE;
 597                         else if (ch->index == 3)
 598                                 enabled_chan4 = TRUE;
 599                         break;
 600                 case SR_CHANNEL_LOGIC:
 601                         if (ch->index < 8)
 602                                 enabled_pod1 = TRUE;
 603                         else
 604                                 enabled_pod2 = TRUE;
 605                         break;
 606                 default:
 607                         return SR_ERR;
 608                 }
 609         }
 610
 611         if ((enabled_pod1 && enabled_chan3) ||
 612             (enabled_pod2 && enabled_chan4))
 613                 return SR_ERR;
 614
 615         return SR_OK;
 616 }
 617
 618 static int hmo_setup_channels(const struct sr_dev_inst *sdi)
 619 {
 620         GSList *l;
 621         unsigned int i;
 622         gboolean *pod_enabled, setup_changed;
 623         char command[MAX_COMMAND_SIZE];
 624         struct scope_state *state;
 625         const struct scope_config *model;
 626         struct sr_channel *ch;
 627         struct dev_context *devc;
 628         struct sr_scpi_dev_inst *scpi;
 629
 630         devc = sdi->priv;
 631         scpi = sdi->conn;
 632         state = devc->model_state;
 633         model = devc->model_config;
 634         setup_changed = FALSE;
 635
 636         pod_enabled = g_try_malloc0(sizeof(gboolean) * model->digital_pods);
 637
 638         for (l = sdi->channels; l; l = l->next) {
 639                 ch = l->data;
 640                 switch (ch->type) {
 641                 case SR_CHANNEL_ANALOG:
 642                         if (ch->enabled == state->analog_channels[ch->index].state)
 643                                 break;
 644                         g_snprintf(command, sizeof(command),
 645                                    (*model->scpi_dialect)[SCPI_CMD_SET_ANALOG_CHAN_STATE],
 646                                    ch->index + 1, ch->enabled);
 647
 648                         if (sr_scpi_send(scpi, command) != SR_OK)
 649                                 return SR_ERR;
 650                         state->analog_channels[ch->index].state = ch->enabled;
 651                         setup_changed = TRUE;
 652                         break;
 653                 case SR_CHANNEL_LOGIC:
 654                         /*
 655                          * A digital POD needs to be enabled for every group of
 656                          * 8 channels.
 657                          */
 658                         if (ch->enabled)
 659                                 pod_enabled[ch->index < 8 ? 0 : 1] = TRUE;
 660
 661                         if (ch->enabled == state->digital_channels[ch->index])
 662                                 break;
 663                         g_snprintf(command, sizeof(command),
 664                                    (*model->scpi_dialect)[SCPI_CMD_SET_DIG_CHAN_STATE],
 665                                    ch->index, ch->enabled);
 666
 667                         if (sr_scpi_send(scpi, command) != SR_OK)
 668                                 return SR_ERR;
 669
 670                         state->digital_channels[ch->index] = ch->enabled;
 671                         setup_changed = TRUE;
 672                         break;
 673                 default:
 674                         return SR_ERR;
 675                 }
 676         }
 677
 678         for (i = 1; i <= model->digital_pods; i++) {
 679                 if (state->digital_pods[i - 1] == pod_enabled[i - 1])
 680                         continue;
 681                 g_snprintf(command, sizeof(command),
 682                            (*model->scpi_dialect)[SCPI_CMD_SET_DIG_POD_STATE],
 683                            i, pod_enabled[i - 1]);
 684                 if (sr_scpi_send(scpi, command) != SR_OK)
 685                         return SR_ERR;
 686                 state->digital_pods[i - 1] = pod_enabled[i - 1];
 687                 setup_changed = TRUE;
 688         }
 689
 690         g_free(pod_enabled);
 691
 692         if (setup_changed && hmo_update_sample_rate(sdi) != SR_OK)
 693                 return SR_ERR;
 694
 695         return SR_OK;
 696 }
 697
 698 static int dev_acquisition_start(const struct sr_dev_inst *sdi)
 699 {
 700         GSList *l;
 701         gboolean digital_added;
 702         struct sr_channel *ch;
 703         struct dev_context *devc;
 704         struct sr_scpi_dev_inst *scpi;
 705
 706         if (sdi->status != SR_ST_ACTIVE)
 707                 return SR_ERR_DEV_CLOSED;
 708
 709         scpi = sdi->conn;
 710         devc = sdi->priv;
 711         digital_added = FALSE;
 712
 713         g_slist_free(devc->enabled_channels);
 714         devc->enabled_channels = NULL;
 715
 716         for (l = sdi->channels; l; l = l->next) {
 717                 ch = l->data;
 718                 if (!ch->enabled)
 719                         continue;
 720                 /* Only add a single digital channel. */
 721                 if (ch->type != SR_CHANNEL_LOGIC || !digital_added) {
 722                         devc->enabled_channels = g_slist_append(
 723                                         devc->enabled_channels, ch);
 724                         if (ch->type == SR_CHANNEL_LOGIC)
 725                                 digital_added = TRUE;
 726                 }
 727         }
 728
 729         if (!devc->enabled_channels)
 730                 return SR_ERR;
 731
 732         if (hmo_check_channels(devc->enabled_channels) != SR_OK) {
 733                 sr_err("Invalid channel configuration specified!");
 734                 return SR_ERR_NA;
 735         }
 736
 737         if (hmo_setup_channels(sdi) != SR_OK) {
 738                 sr_err("Failed to setup channel configuration!");
 739                 return SR_ERR;
 740         }
 741
 742         sr_scpi_source_add(sdi->session, scpi, G_IO_IN, 50,
 743                         hmo_receive_data, (void *)sdi);
 744
 745         std_session_send_df_header(sdi, LOG_PREFIX);
 746
 747         devc->current_channel = devc->enabled_channels;
 748
 749         return hmo_request_data(sdi);
 750 }
 751
 752 static int dev_acquisition_stop(struct sr_dev_inst *sdi)
 753 {
 754         struct dev_context *devc;
 755         struct sr_scpi_dev_inst *scpi;
 756
 757         std_session_send_df_end(sdi, LOG_PREFIX);
 758
 759         if (sdi->status != SR_ST_ACTIVE)
 760                 return SR_ERR_DEV_CLOSED;
 761
 762         devc = sdi->priv;
 763
 764         devc->num_frames = 0;
 765         g_slist_free(devc->enabled_channels);
 766         devc->enabled_channels = NULL;
 767         scpi = sdi->conn;
 768         sr_scpi_source_remove(sdi->session, scpi);
 769
 770         return SR_OK;
 771 }
 772
 773 SR_PRIV struct sr_dev_driver hameg_hmo_driver_info = {
 774         .name = "hameg-hmo",
 775         .longname = "Hameg HMO",
 776         .api_version = 1,
 777         .init = std_init,
 778         .cleanup = std_cleanup,
 779         .scan = scan,
 780         .dev_list = std_dev_list,
 781         .dev_clear = dev_clear,
 782         .config_get = config_get,
 783         .config_set = config_set,
 784         .config_list = config_list,
 785         .dev_open = dev_open,
 786         .dev_close = dev_close,
 787         .dev_acquisition_start = dev_acquisition_start,
 788         .dev_acquisition_stop = dev_acquisition_stop,
 789         .context = NULL,
 790 };