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 <stdlib.h>
  21 #include "protocol.h"
  22
  23 #define SERIALCOMM "115200/8n1/flow=1"
  24
  25 SR_PRIV struct sr_dev_driver hameg_hmo_driver_info;
  26 static struct sr_dev_driver *di = &hameg_hmo_driver_info;
  27
  28 static const char *manufacturers[] = {
  29         "HAMEG",
  30 };
  31
  32 static const int32_t hwopts[] = {
  33         SR_CONF_CONN,
  34         SR_CONF_SERIALCOMM,
  35 };
  36
  37 enum {
  38         PG_INVALID = -1,
  39         PG_NONE,
  40         PG_ANALOG,
  41         PG_DIGITAL,
  42 };
  43
  44 static int init(struct sr_context *sr_ctx)
  45 {
  46         return std_init(sr_ctx, di, LOG_PREFIX);
  47 }
  48
  49 static int check_manufacturer(const char *manufacturer)
  50 {
  51         unsigned int i;
  52
  53         for (i = 0; i < ARRAY_SIZE(manufacturers); ++i)
  54                 if (!strcmp(manufacturer, manufacturers[i]))
  55                         return SR_OK;
  56
  57         return SR_ERR;
  58 }
  59
  60 static struct sr_dev_inst *hmo_probe_serial_device(struct sr_scpi_dev_inst *scpi)
  61 {
  62         struct sr_dev_inst *sdi;
  63         struct dev_context *devc;
  64         struct sr_scpi_hw_info *hw_info;
  65
  66         sdi = NULL;
  67         devc = NULL;
  68         hw_info = NULL;
  69
  70         if (sr_scpi_get_hw_id(scpi, &hw_info) != SR_OK) {
  71                 sr_info("Couldn't get IDN response.");
  72                 goto fail;
  73         }
  74
  75         if (check_manufacturer(hw_info->manufacturer) != SR_OK)
  76                 goto fail;
  77
  78         if (!(sdi = sr_dev_inst_new(0, SR_ST_ACTIVE,
  79                                     hw_info->manufacturer, hw_info->model,
  80                                     hw_info->firmware_version))) {
  81                 goto fail;
  82         }
  83         sr_scpi_hw_info_free(hw_info);
  84         hw_info = NULL;
  85
  86         if (!(devc = g_try_malloc0(sizeof(struct dev_context))))
  87                 goto fail;
  88
  89         sdi->driver = di;
  90         sdi->priv = devc;
  91         sdi->inst_type = SR_INST_SCPI;
  92         sdi->conn = scpi;
  93
  94         if (hmo_init_device(sdi) != SR_OK)
  95                 goto fail;
  96
  97         sr_scpi_close(sdi->conn);
  98
  99         sdi->status = SR_ST_INACTIVE;
 100
 101         return sdi;
 102
 103 fail:
 104         if (hw_info)
 105                 sr_scpi_hw_info_free(hw_info);
 106         if (sdi)
 107                 sr_dev_inst_free(sdi);
 108         if (devc)
 109                 g_free(devc);
 110
 111         return NULL;
 112 }
 113
 114 static GSList *scan(GSList *options)
 115 {
 116         return sr_scpi_scan(di->priv, options, hmo_probe_serial_device);
 117 }
 118
 119 static GSList *dev_list(void)
 120 {
 121         return ((struct drv_context *)(di->priv))->instances;
 122 }
 123
 124 static void clear_helper(void *priv)
 125 {
 126         unsigned int i;
 127         struct dev_context *devc;
 128         struct scope_config *model;
 129
 130         devc = priv;
 131         model = devc->model_config;
 132
 133         hmo_scope_state_free(devc->model_state);
 134
 135         for (i = 0; i < model->analog_channels; ++i)
 136                 g_slist_free(devc->analog_groups[i].probes);
 137
 138         for (i = 0; i < model->digital_pods; ++i) {
 139                 g_slist_free(devc->digital_groups[i].probes);
 140                 g_free(devc->digital_groups[i].name);
 141         }
 142
 143         g_free(devc->analog_groups);
 144         g_free(devc->digital_groups);
 145
 146         g_free(devc);
 147 }
 148
 149 static int dev_clear(void)
 150 {
 151         return std_dev_clear(di, clear_helper);
 152 }
 153
 154 static int dev_open(struct sr_dev_inst *sdi)
 155 {
 156         if (sdi->status != SR_ST_ACTIVE && sr_scpi_open(sdi->conn) != SR_OK)
 157                 return SR_ERR;
 158
 159         if (hmo_scope_state_get(sdi) != SR_OK)
 160                 return SR_ERR;
 161
 162         sdi->status = SR_ST_ACTIVE;
 163
 164         return SR_OK;
 165 }
 166
 167 static int dev_close(struct sr_dev_inst *sdi)
 168 {
 169         if (sdi->status == SR_ST_INACTIVE)
 170                 return SR_OK;
 171
 172         sr_scpi_close(sdi->conn);
 173
 174         sdi->status = SR_ST_INACTIVE;
 175
 176         return SR_OK;
 177 }
 178
 179 static int cleanup(void)
 180 {
 181         dev_clear();
 182
 183         return SR_OK;
 184 }
 185
 186 static int check_probe_group(struct dev_context *devc,
 187                              const struct sr_probe_group *probe_group)
 188 {
 189         unsigned int i;
 190         struct scope_config *model;
 191
 192         model = devc->model_config;
 193
 194         if (!probe_group)
 195                 return PG_NONE;
 196
 197         for (i = 0; i < model->analog_channels; ++i)
 198                 if (probe_group == &devc->analog_groups[i])
 199                         return PG_ANALOG;
 200
 201         for (i = 0; i < model->digital_pods; ++i)
 202                 if (probe_group == &devc->digital_groups[i])
 203                         return PG_DIGITAL;
 204
 205         sr_err("Invalid probe group specified.");
 206
 207         return PG_INVALID;
 208 }
 209
 210 static int config_get(int key, GVariant **data, const struct sr_dev_inst *sdi,
 211                       const struct sr_probe_group *probe_group)
 212 {
 213         int ret, pg_type;
 214         unsigned int i;
 215         struct dev_context *devc;
 216         struct scope_config *model;
 217         struct scope_state *state;
 218
 219         if (!sdi || !(devc = sdi->priv))
 220                 return SR_ERR_ARG;
 221
 222         if ((pg_type = check_probe_group(devc, probe_group)) == PG_INVALID)
 223                 return SR_ERR;
 224
 225         ret = SR_ERR_NA;
 226         model = devc->model_config;
 227         state = devc->model_state;
 228
 229         switch (key) {
 230         case SR_CONF_NUM_TIMEBASE:
 231                 *data = g_variant_new_int32(model->num_xdivs);
 232                 ret = SR_OK;
 233                 break;
 234         case SR_CONF_NUM_VDIV:
 235                 if (pg_type == PG_NONE) {
 236                         sr_err("No probe group specified.");
 237                         return SR_ERR_PROBE_GROUP;
 238                 } else if (pg_type == PG_ANALOG) {
 239                         for (i = 0; i < model->analog_channels; ++i) {
 240                                 if (probe_group != &devc->analog_groups[i])
 241                                         continue;
 242                                 *data = g_variant_new_int32(model->num_ydivs);
 243                                 ret = SR_OK;
 244                                 break;
 245                         }
 246
 247                 } else {
 248                         ret = SR_ERR_NA;
 249                 }
 250                 break;
 251         case SR_CONF_TRIGGER_SOURCE:
 252                 *data = g_variant_new_string((*model->trigger_sources)[state->trigger_source]);
 253                 ret = SR_OK;
 254                 break;
 255         case SR_CONF_COUPLING:
 256                 if (pg_type == PG_NONE) {
 257                         sr_err("No probe group specified.");
 258                         return SR_ERR_PROBE_GROUP;
 259                 } else if (pg_type == PG_ANALOG) {
 260                         for (i = 0; i < model->analog_channels; ++i) {
 261                                 if (probe_group != &devc->analog_groups[i])
 262                                         continue;
 263                                 *data = g_variant_new_string((*model->coupling_options)[state->analog_channels[i].coupling]);
 264                                 ret = SR_OK;
 265                                 break;
 266                         }
 267
 268                 } else {
 269                         ret = SR_ERR_NA;
 270                 }
 271                 break;
 272         case SR_CONF_SAMPLERATE:
 273                 *data = g_variant_new_uint64(state->sample_rate);
 274                 ret = SR_OK;
 275                 break;
 276         default:
 277                 ret = SR_ERR_NA;
 278         }
 279
 280         return ret;
 281 }
 282
 283 static GVariant *build_tuples(const uint64_t (*array)[][2], unsigned int n)
 284 {
 285         unsigned int i;
 286         GVariant *rational[2];
 287         GVariantBuilder gvb;
 288
 289         g_variant_builder_init(&gvb, G_VARIANT_TYPE_ARRAY);
 290
 291         for (i = 0; i < n; i++) {
 292                 rational[0] = g_variant_new_uint64((*array)[i][0]);
 293                 rational[1] = g_variant_new_uint64((*array)[i][1]);
 294
 295                 /* FIXME: Valgrind reports a memory leak here. */
 296                 g_variant_builder_add_value(&gvb, g_variant_new_tuple(rational, 2));
 297         }
 298
 299         return g_variant_builder_end(&gvb);
 300 }
 301
 302 static int config_set(int key, GVariant *data, const struct sr_dev_inst *sdi,
 303                       const struct sr_probe_group *probe_group)
 304 {
 305         int ret, pg_type;
 306         unsigned int i, j;
 307         char command[MAX_COMMAND_SIZE], float_str[30];
 308         struct dev_context *devc;
 309         struct scope_config *model;
 310         struct scope_state *state;
 311         const char *tmp;
 312         uint64_t p, q;
 313         double tmp_d;
 314         gboolean update_sample_rate;
 315
 316         if (!sdi || !(devc = sdi->priv))
 317                 return SR_ERR_ARG;
 318
 319         if ((pg_type = check_probe_group(devc, probe_group)) == PG_INVALID)
 320                 return SR_ERR;
 321
 322         model = devc->model_config;
 323         state = devc->model_state;
 324         update_sample_rate = FALSE;
 325
 326         ret = SR_ERR_NA;
 327
 328         switch (key) {
 329         case SR_CONF_LIMIT_FRAMES:
 330                 devc->frame_limit = g_variant_get_uint64(data);
 331                 ret = SR_OK;
 332                 break;
 333         case SR_CONF_TRIGGER_SOURCE:
 334                 tmp = g_variant_get_string(data, NULL);
 335                 for (i = 0; (*model->trigger_sources)[i]; i++) {
 336                         if (g_strcmp0(tmp, (*model->trigger_sources)[i]) != 0)
 337                                 continue;
 338                         state->trigger_source = i;
 339                         g_snprintf(command, sizeof(command),
 340                                    (*model->scpi_dialect)[SCPI_CMD_SET_TRIGGER_SOURCE],
 341                                    (*model->trigger_sources)[i]);
 342
 343                         ret = sr_scpi_send(sdi->conn, command);
 344                         break;
 345                 }
 346                 break;
 347         case SR_CONF_VDIV:
 348                 if (pg_type == PG_NONE) {
 349                         sr_err("No probe group specified.");
 350                         return SR_ERR_PROBE_GROUP;
 351                 }
 352
 353                 g_variant_get(data, "(tt)", &p, &q);
 354
 355                 for (i = 0; i < model->num_vdivs; i++) {
 356                         if (p != (*model->vdivs)[i][0] ||
 357                             q != (*model->vdivs)[i][1])
 358                                 continue;
 359                         for (j = 1; j <= model->analog_channels; ++j) {
 360                                 if (probe_group != &devc->analog_groups[j - 1])
 361                                         continue;
 362                                 state->analog_channels[j - 1].vdiv = i;
 363                                 g_ascii_formatd(float_str, sizeof(float_str), "%E", (float) p / q);
 364                                 g_snprintf(command, sizeof(command),
 365                                            (*model->scpi_dialect)[SCPI_CMD_SET_VERTICAL_DIV],
 366                                            j, float_str);
 367
 368                                 if (sr_scpi_send(sdi->conn, command) != SR_OK ||
 369                                     sr_scpi_get_opc(sdi->conn) != SR_OK)
 370                                         return SR_ERR;
 371
 372                                 break;
 373                         }
 374
 375                         ret = SR_OK;
 376                         break;
 377                 }
 378                 break;
 379         case SR_CONF_TIMEBASE:
 380                 g_variant_get(data, "(tt)", &p, &q);
 381
 382                 for (i = 0; i < model->num_timebases; i++) {
 383                         if (p != (*model->timebases)[i][0] ||
 384                             q != (*model->timebases)[i][1])
 385                                 continue;
 386                         state->timebase = i;
 387                         g_ascii_formatd(float_str, sizeof(float_str), "%E", (float) p / q);
 388                         g_snprintf(command, sizeof(command),
 389                                    (*model->scpi_dialect)[SCPI_CMD_SET_TIMEBASE],
 390                                    float_str);
 391
 392                         ret = sr_scpi_send(sdi->conn, command);
 393                         update_sample_rate = TRUE;
 394                         break;
 395                 }
 396                 break;
 397         case SR_CONF_HORIZ_TRIGGERPOS:
 398                 tmp_d = g_variant_get_double(data);
 399
 400                 if (tmp_d < 0.0 || tmp_d > 1.0)
 401                         return SR_ERR;
 402
 403                 state->horiz_triggerpos = -(tmp_d - 0.5) * state->timebase * model->num_xdivs;
 404                 g_snprintf(command, sizeof(command),
 405                            (*model->scpi_dialect)[SCPI_CMD_SET_HORIZ_TRIGGERPOS],
 406                            state->horiz_triggerpos);
 407
 408                 ret = sr_scpi_send(sdi->conn, command);
 409                 break;
 410         case SR_CONF_TRIGGER_SLOPE:
 411                 tmp = g_variant_get_string(data, NULL);
 412
 413                 if (!tmp || !(tmp[0] == 'f' || tmp[0] == 'r'))
 414                         return SR_ERR_ARG;
 415
 416                 state->trigger_slope = (tmp[0] == 'r') ? 0 : 1;
 417
 418                 g_snprintf(command, sizeof(command),
 419                            (*model->scpi_dialect)[SCPI_CMD_SET_TRIGGER_SLOPE],
 420                            (state->trigger_slope == 0) ? "POS" : "NEG");
 421
 422                 ret = sr_scpi_send(sdi->conn, command);
 423                 break;
 424         case SR_CONF_COUPLING:
 425                 if (pg_type == PG_NONE) {
 426                         sr_err("No probe group specified.");
 427                         return SR_ERR_PROBE_GROUP;
 428                 }
 429
 430                 tmp = g_variant_get_string(data, NULL);
 431
 432                 for (i = 0; (*model->coupling_options)[i]; i++) {
 433                         if (strcmp(tmp, (*model->coupling_options)[i]) != 0)
 434                                 continue;
 435                         for (j = 1; j <= model->analog_channels; ++j) {
 436                                 if (probe_group != &devc->analog_groups[j - 1])
 437                                         continue;
 438                                 state->analog_channels[j-1].coupling = i;
 439
 440                                 g_snprintf(command, sizeof(command),
 441                                            (*model->scpi_dialect)[SCPI_CMD_SET_COUPLING],
 442                                            j, tmp);
 443
 444                                 if (sr_scpi_send(sdi->conn, command) != SR_OK ||
 445                                     sr_scpi_get_opc(sdi->conn) != SR_OK)
 446                                         return SR_ERR;
 447                                 break;
 448                         }
 449
 450                         ret = SR_OK;
 451                         break;
 452                 }
 453                 break;
 454         default:
 455                 ret = SR_ERR_NA;
 456                 break;
 457         }
 458
 459         if (ret == SR_OK)
 460                 ret = sr_scpi_get_opc(sdi->conn);
 461
 462         if (ret == SR_OK && update_sample_rate)
 463                 ret = hmo_update_sample_rate(sdi);
 464
 465         return ret;
 466 }
 467
 468 static int config_list(int key, GVariant **data, const struct sr_dev_inst *sdi,
 469                        const struct sr_probe_group *probe_group)
 470 {
 471         int pg_type;
 472         struct dev_context *devc;
 473         struct scope_config *model;
 474
 475         if (!sdi || !(devc = sdi->priv))
 476                 return SR_ERR_ARG;
 477
 478         if ((pg_type = check_probe_group(devc, probe_group)) == PG_INVALID)
 479                 return SR_ERR;
 480
 481         model = devc->model_config;
 482
 483         switch (key) {
 484         case SR_CONF_DEVICE_OPTIONS:
 485                 if (pg_type == PG_NONE) {
 486                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
 487                                 model->hw_caps, model->num_hwcaps,
 488                                 sizeof(int32_t));
 489                 } else if (pg_type == PG_ANALOG) {
 490                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
 491                                 model->analog_hwcaps, model->num_analog_hwcaps,
 492                                 sizeof(int32_t));
 493                 } else {
 494                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
 495                                 NULL, 0, sizeof(int32_t));
 496                 }
 497                 break;
 498         case SR_CONF_COUPLING:
 499                 if (pg_type == PG_NONE)
 500                         return SR_ERR_PROBE_GROUP;
 501                 *data = g_variant_new_strv(*model->coupling_options,
 502                            g_strv_length((char **)*model->coupling_options));
 503                 break;
 504         case SR_CONF_TRIGGER_SOURCE:
 505                 *data = g_variant_new_strv(*model->trigger_sources,
 506                            g_strv_length((char **)*model->trigger_sources));
 507                 break;
 508         case SR_CONF_TIMEBASE:
 509                 *data = build_tuples(model->timebases, model->num_timebases);
 510                 break;
 511         case SR_CONF_VDIV:
 512                 if (pg_type == PG_NONE)
 513                         return SR_ERR_PROBE_GROUP;
 514                 *data = build_tuples(model->vdivs, model->num_vdivs);
 515                 break;
 516         default:
 517                 return SR_ERR_NA;
 518         }
 519
 520         return SR_OK;
 521 }
 522
 523 SR_PRIV int hmo_request_data(const struct sr_dev_inst *sdi)
 524 {
 525         char command[MAX_COMMAND_SIZE];
 526         struct sr_probe *probe;
 527         struct dev_context *devc;
 528         struct scope_config *model;
 529
 530         devc = sdi->priv;
 531         model = devc->model_config;
 532
 533         probe = devc->current_probe->data;
 534
 535         switch (probe->type) {
 536         case SR_PROBE_ANALOG:
 537                 g_snprintf(command, sizeof(command),
 538                            (*model->scpi_dialect)[SCPI_CMD_GET_ANALOG_DATA],
 539                            probe->index + 1);
 540                 break;
 541         case SR_PROBE_LOGIC:
 542                 g_snprintf(command, sizeof(command),
 543                            (*model->scpi_dialect)[SCPI_CMD_GET_DIG_DATA],
 544                            probe->index < 8 ? 1 : 2);
 545                 break;
 546         default:
 547                 sr_err("Invalid probe type.");
 548                 break;
 549         }
 550
 551         return sr_scpi_send(sdi->conn, command);
 552 }
 553
 554 static int hmo_check_probes(GSList *probes)
 555 {
 556         GSList *l;
 557         struct sr_probe *probe;
 558         gboolean enabled_pod1, enabled_pod2, enabled_chan3, enabled_chan4;
 559
 560         enabled_pod1 = enabled_pod2 = enabled_chan3 = enabled_chan4 = FALSE;
 561
 562         for (l = probes; l; l = l->next) {
 563                 probe = l->data;
 564                 switch (probe->type) {
 565                 case SR_PROBE_ANALOG:
 566                         if (probe->index == 2)
 567                                 enabled_chan3 = TRUE;
 568                         else if (probe->index == 3)
 569                                 enabled_chan4 = TRUE;
 570                         break;
 571                 case SR_PROBE_LOGIC:
 572                         if (probe->index < 8)
 573                                 enabled_pod1 = TRUE;
 574                         else
 575                                 enabled_pod2 = TRUE;
 576                         break;
 577                 default:
 578                         return SR_ERR;
 579                 }
 580         }
 581
 582         if ((enabled_pod1 && enabled_chan3) ||
 583             (enabled_pod2 && enabled_chan4))
 584                 return SR_ERR;
 585
 586         return SR_OK;
 587 }
 588
 589 static int hmo_setup_probes(const struct sr_dev_inst *sdi)
 590 {
 591         GSList *l;
 592         unsigned int i;
 593         gboolean *pod_enabled, setup_changed;
 594         char command[MAX_COMMAND_SIZE];
 595         struct scope_state *state;
 596         struct scope_config *model;
 597         struct sr_probe *probe;
 598         struct dev_context *devc;
 599         struct sr_scpi_dev_inst *scpi;
 600
 601         devc = sdi->priv;
 602         scpi = sdi->conn;
 603         state = devc->model_state;
 604         model = devc->model_config;
 605         setup_changed = FALSE;
 606
 607         pod_enabled = g_try_malloc0(sizeof(gboolean) * model->digital_pods);
 608
 609         for (l = sdi->probes; l; l = l->next) {
 610                 probe = l->data;
 611                 switch (probe->type) {
 612                 case SR_PROBE_ANALOG:
 613                         if (probe->enabled == state->analog_channels[probe->index].state)
 614                                 break;
 615                         g_snprintf(command, sizeof(command),
 616                                    (*model->scpi_dialect)[SCPI_CMD_SET_ANALOG_CHAN_STATE],
 617                                    probe->index + 1, probe->enabled);
 618
 619                         if (sr_scpi_send(scpi, command) != SR_OK)
 620                                 return SR_ERR;
 621                         state->analog_channels[probe->index].state = probe->enabled;
 622                         setup_changed = TRUE;
 623                         break;
 624                 case SR_PROBE_LOGIC:
 625                         /*
 626                          * A digital POD needs to be enabled for every group of
 627                          * 8 probes.
 628                          */
 629                         if (probe->enabled)
 630                                 pod_enabled[probe->index < 8 ? 0 : 1] = TRUE;
 631
 632                         if (probe->enabled == state->digital_channels[probe->index])
 633                                 break;
 634                         g_snprintf(command, sizeof(command),
 635                                    (*model->scpi_dialect)[SCPI_CMD_SET_DIG_CHAN_STATE],
 636                                    probe->index, probe->enabled);
 637
 638                         if (sr_scpi_send(scpi, command) != SR_OK)
 639                                 return SR_ERR;
 640
 641                         state->digital_channels[probe->index] = probe->enabled;
 642                         setup_changed = TRUE;
 643                         break;
 644                 default:
 645                         return SR_ERR;
 646                 }
 647         }
 648
 649         for (i = 1; i <= model->digital_pods; ++i) {
 650                 if (state->digital_pods[i - 1] == pod_enabled[i - 1])
 651                         continue;
 652                 g_snprintf(command, sizeof(command),
 653                            (*model->scpi_dialect)[SCPI_CMD_SET_DIG_POD_STATE],
 654                            i, pod_enabled[i - 1]);
 655                 if (sr_scpi_send(scpi, command) != SR_OK)
 656                         return SR_ERR;
 657                 state->digital_pods[i - 1] = pod_enabled[i - 1];
 658                 setup_changed = TRUE;
 659         }
 660
 661         g_free(pod_enabled);
 662
 663         if (setup_changed && hmo_update_sample_rate(sdi) != SR_OK)
 664                 return SR_ERR;
 665
 666         return SR_OK;
 667 }
 668
 669 static int dev_acquisition_start(const struct sr_dev_inst *sdi, void *cb_data)
 670 {
 671         GSList *l;
 672         gboolean digital_added;
 673         struct sr_probe *probe;
 674         struct dev_context *devc;
 675         struct sr_scpi_dev_inst *scpi;
 676
 677         if (sdi->status != SR_ST_ACTIVE)
 678                 return SR_ERR_DEV_CLOSED;
 679
 680         scpi = sdi->conn;
 681         devc = sdi->priv;
 682         digital_added = FALSE;
 683
 684         for (l = sdi->probes; l; l = l->next) {
 685                 probe = l->data;
 686                 if (!probe->enabled)
 687                         continue;
 688                 /* Only add a single digital probe. */
 689                 if (probe->type != SR_PROBE_LOGIC || !digital_added) {
 690                         devc->enabled_probes = g_slist_append(
 691                                         devc->enabled_probes, probe);
 692                         if (probe->type == SR_PROBE_LOGIC)
 693                                 digital_added = TRUE;
 694                 }
 695         }
 696
 697         if (!devc->enabled_probes)
 698                 return SR_ERR;
 699
 700         if (hmo_check_probes(devc->enabled_probes) != SR_OK) {
 701                 sr_err("Invalid probe configuration specified!");
 702                 return SR_ERR_NA;
 703         }
 704
 705         if (hmo_setup_probes(sdi) != SR_OK) {
 706                 sr_err("Failed to setup probe configuration!");
 707                 return SR_ERR;
 708         }
 709
 710         sr_scpi_source_add(scpi, G_IO_IN, 50, hmo_receive_data, (void *)sdi);
 711
 712         /* Send header packet to the session bus. */
 713         std_session_send_df_header(cb_data, LOG_PREFIX);
 714
 715         devc->current_probe = devc->enabled_probes;
 716
 717         return hmo_request_data(sdi);
 718 }
 719
 720 static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
 721 {
 722         struct dev_context *devc;
 723         struct sr_scpi_dev_inst *scpi;
 724         struct sr_datafeed_packet packet;
 725
 726         (void)cb_data;
 727
 728         packet.type = SR_DF_END;
 729         packet.payload = NULL;
 730         sr_session_send(sdi, &packet);
 731
 732         if (sdi->status != SR_ST_ACTIVE)
 733                 return SR_ERR_DEV_CLOSED;
 734
 735         devc = sdi->priv;
 736
 737         devc->num_frames = 0;
 738         g_slist_free(devc->enabled_probes);
 739         devc->enabled_probes = NULL;
 740         scpi = sdi->conn;
 741         sr_scpi_source_remove(scpi);
 742
 743         return SR_OK;
 744 }
 745
 746 SR_PRIV struct sr_dev_driver hameg_hmo_driver_info = {
 747         .name = "hameg-hmo",
 748         .longname = "Hameg HMO",
 749         .api_version = 1,
 750         .init = init,
 751         .cleanup = cleanup,
 752         .scan = scan,
 753         .dev_list = dev_list,
 754         .dev_clear = dev_clear,
 755         .config_get = config_get,
 756         .config_set = config_set,
 757         .config_list = config_list,
 758         .dev_open = dev_open,
 759         .dev_close = dev_close,
 760         .dev_acquisition_start = dev_acquisition_start,
 761         .dev_acquisition_stop = dev_acquisition_stop,
 762         .priv = NULL,
 763 };