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;
 404                 tmp_d = -(tmp_d - 0.5) *
 405                         ((double) (*model->timebases)[state->timebase][0] /
 406                         (*model->timebases)[state->timebase][1])
 407                          * model->num_xdivs;
 408
 409                 g_ascii_formatd(float_str, sizeof(float_str), "%E", tmp_d);
 410                 g_snprintf(command, sizeof(command),
 411                            (*model->scpi_dialect)[SCPI_CMD_SET_HORIZ_TRIGGERPOS],
 412                            float_str);
 413
 414                 ret = sr_scpi_send(sdi->conn, command);
 415                 break;
 416         case SR_CONF_TRIGGER_SLOPE:
 417                 tmp = g_variant_get_string(data, NULL);
 418
 419                 if (!tmp || !(tmp[0] == 'f' || tmp[0] == 'r'))
 420                         return SR_ERR_ARG;
 421
 422                 state->trigger_slope = (tmp[0] == 'r') ? 0 : 1;
 423
 424                 g_snprintf(command, sizeof(command),
 425                            (*model->scpi_dialect)[SCPI_CMD_SET_TRIGGER_SLOPE],
 426                            (state->trigger_slope == 0) ? "POS" : "NEG");
 427
 428                 ret = sr_scpi_send(sdi->conn, command);
 429                 break;
 430         case SR_CONF_COUPLING:
 431                 if (pg_type == PG_NONE) {
 432                         sr_err("No probe group specified.");
 433                         return SR_ERR_PROBE_GROUP;
 434                 }
 435
 436                 tmp = g_variant_get_string(data, NULL);
 437
 438                 for (i = 0; (*model->coupling_options)[i]; i++) {
 439                         if (strcmp(tmp, (*model->coupling_options)[i]) != 0)
 440                                 continue;
 441                         for (j = 1; j <= model->analog_channels; ++j) {
 442                                 if (probe_group != &devc->analog_groups[j - 1])
 443                                         continue;
 444                                 state->analog_channels[j-1].coupling = i;
 445
 446                                 g_snprintf(command, sizeof(command),
 447                                            (*model->scpi_dialect)[SCPI_CMD_SET_COUPLING],
 448                                            j, tmp);
 449
 450                                 if (sr_scpi_send(sdi->conn, command) != SR_OK ||
 451                                     sr_scpi_get_opc(sdi->conn) != SR_OK)
 452                                         return SR_ERR;
 453                                 break;
 454                         }
 455
 456                         ret = SR_OK;
 457                         break;
 458                 }
 459                 break;
 460         default:
 461                 ret = SR_ERR_NA;
 462                 break;
 463         }
 464
 465         if (ret == SR_OK)
 466                 ret = sr_scpi_get_opc(sdi->conn);
 467
 468         if (ret == SR_OK && update_sample_rate)
 469                 ret = hmo_update_sample_rate(sdi);
 470
 471         return ret;
 472 }
 473
 474 static int config_list(int key, GVariant **data, const struct sr_dev_inst *sdi,
 475                        const struct sr_probe_group *probe_group)
 476 {
 477         int pg_type;
 478         struct dev_context *devc;
 479         struct scope_config *model;
 480
 481         if (!sdi || !(devc = sdi->priv))
 482                 return SR_ERR_ARG;
 483
 484         if ((pg_type = check_probe_group(devc, probe_group)) == PG_INVALID)
 485                 return SR_ERR;
 486
 487         model = devc->model_config;
 488
 489         switch (key) {
 490         case SR_CONF_DEVICE_OPTIONS:
 491                 if (pg_type == PG_NONE) {
 492                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
 493                                 model->hw_caps, model->num_hwcaps,
 494                                 sizeof(int32_t));
 495                 } else if (pg_type == PG_ANALOG) {
 496                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
 497                                 model->analog_hwcaps, model->num_analog_hwcaps,
 498                                 sizeof(int32_t));
 499                 } else {
 500                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
 501                                 NULL, 0, sizeof(int32_t));
 502                 }
 503                 break;
 504         case SR_CONF_COUPLING:
 505                 if (pg_type == PG_NONE)
 506                         return SR_ERR_PROBE_GROUP;
 507                 *data = g_variant_new_strv(*model->coupling_options,
 508                            g_strv_length((char **)*model->coupling_options));
 509                 break;
 510         case SR_CONF_TRIGGER_SOURCE:
 511                 *data = g_variant_new_strv(*model->trigger_sources,
 512                            g_strv_length((char **)*model->trigger_sources));
 513                 break;
 514         case SR_CONF_TRIGGER_SLOPE:
 515                 *data = g_variant_new_strv(*model->trigger_slopes,
 516                            g_strv_length((char **)*model->trigger_slopes));
 517                 break;
 518         case SR_CONF_TIMEBASE:
 519                 *data = build_tuples(model->timebases, model->num_timebases);
 520                 break;
 521         case SR_CONF_VDIV:
 522                 if (pg_type == PG_NONE)
 523                         return SR_ERR_PROBE_GROUP;
 524                 *data = build_tuples(model->vdivs, model->num_vdivs);
 525                 break;
 526         default:
 527                 return SR_ERR_NA;
 528         }
 529
 530         return SR_OK;
 531 }
 532
 533 SR_PRIV int hmo_request_data(const struct sr_dev_inst *sdi)
 534 {
 535         char command[MAX_COMMAND_SIZE];
 536         struct sr_probe *probe;
 537         struct dev_context *devc;
 538         struct scope_config *model;
 539
 540         devc = sdi->priv;
 541         model = devc->model_config;
 542
 543         probe = devc->current_probe->data;
 544
 545         switch (probe->type) {
 546         case SR_PROBE_ANALOG:
 547                 g_snprintf(command, sizeof(command),
 548                            (*model->scpi_dialect)[SCPI_CMD_GET_ANALOG_DATA],
 549                            probe->index + 1);
 550                 break;
 551         case SR_PROBE_LOGIC:
 552                 g_snprintf(command, sizeof(command),
 553                            (*model->scpi_dialect)[SCPI_CMD_GET_DIG_DATA],
 554                            probe->index < 8 ? 1 : 2);
 555                 break;
 556         default:
 557                 sr_err("Invalid probe type.");
 558                 break;
 559         }
 560
 561         return sr_scpi_send(sdi->conn, command);
 562 }
 563
 564 static int hmo_check_probes(GSList *probes)
 565 {
 566         GSList *l;
 567         struct sr_probe *probe;
 568         gboolean enabled_pod1, enabled_pod2, enabled_chan3, enabled_chan4;
 569
 570         enabled_pod1 = enabled_pod2 = enabled_chan3 = enabled_chan4 = FALSE;
 571
 572         for (l = probes; l; l = l->next) {
 573                 probe = l->data;
 574                 switch (probe->type) {
 575                 case SR_PROBE_ANALOG:
 576                         if (probe->index == 2)
 577                                 enabled_chan3 = TRUE;
 578                         else if (probe->index == 3)
 579                                 enabled_chan4 = TRUE;
 580                         break;
 581                 case SR_PROBE_LOGIC:
 582                         if (probe->index < 8)
 583                                 enabled_pod1 = TRUE;
 584                         else
 585                                 enabled_pod2 = TRUE;
 586                         break;
 587                 default:
 588                         return SR_ERR;
 589                 }
 590         }
 591
 592         if ((enabled_pod1 && enabled_chan3) ||
 593             (enabled_pod2 && enabled_chan4))
 594                 return SR_ERR;
 595
 596         return SR_OK;
 597 }
 598
 599 static int hmo_setup_probes(const struct sr_dev_inst *sdi)
 600 {
 601         GSList *l;
 602         unsigned int i;
 603         gboolean *pod_enabled, setup_changed;
 604         char command[MAX_COMMAND_SIZE];
 605         struct scope_state *state;
 606         struct scope_config *model;
 607         struct sr_probe *probe;
 608         struct dev_context *devc;
 609         struct sr_scpi_dev_inst *scpi;
 610
 611         devc = sdi->priv;
 612         scpi = sdi->conn;
 613         state = devc->model_state;
 614         model = devc->model_config;
 615         setup_changed = FALSE;
 616
 617         pod_enabled = g_try_malloc0(sizeof(gboolean) * model->digital_pods);
 618
 619         for (l = sdi->probes; l; l = l->next) {
 620                 probe = l->data;
 621                 switch (probe->type) {
 622                 case SR_PROBE_ANALOG:
 623                         if (probe->enabled == state->analog_channels[probe->index].state)
 624                                 break;
 625                         g_snprintf(command, sizeof(command),
 626                                    (*model->scpi_dialect)[SCPI_CMD_SET_ANALOG_CHAN_STATE],
 627                                    probe->index + 1, probe->enabled);
 628
 629                         if (sr_scpi_send(scpi, command) != SR_OK)
 630                                 return SR_ERR;
 631                         state->analog_channels[probe->index].state = probe->enabled;
 632                         setup_changed = TRUE;
 633                         break;
 634                 case SR_PROBE_LOGIC:
 635                         /*
 636                          * A digital POD needs to be enabled for every group of
 637                          * 8 probes.
 638                          */
 639                         if (probe->enabled)
 640                                 pod_enabled[probe->index < 8 ? 0 : 1] = TRUE;
 641
 642                         if (probe->enabled == state->digital_channels[probe->index])
 643                                 break;
 644                         g_snprintf(command, sizeof(command),
 645                                    (*model->scpi_dialect)[SCPI_CMD_SET_DIG_CHAN_STATE],
 646                                    probe->index, probe->enabled);
 647
 648                         if (sr_scpi_send(scpi, command) != SR_OK)
 649                                 return SR_ERR;
 650
 651                         state->digital_channels[probe->index] = probe->enabled;
 652                         setup_changed = TRUE;
 653                         break;
 654                 default:
 655                         return SR_ERR;
 656                 }
 657         }
 658
 659         for (i = 1; i <= model->digital_pods; ++i) {
 660                 if (state->digital_pods[i - 1] == pod_enabled[i - 1])
 661                         continue;
 662                 g_snprintf(command, sizeof(command),
 663                            (*model->scpi_dialect)[SCPI_CMD_SET_DIG_POD_STATE],
 664                            i, pod_enabled[i - 1]);
 665                 if (sr_scpi_send(scpi, command) != SR_OK)
 666                         return SR_ERR;
 667                 state->digital_pods[i - 1] = pod_enabled[i - 1];
 668                 setup_changed = TRUE;
 669         }
 670
 671         g_free(pod_enabled);
 672
 673         if (setup_changed && hmo_update_sample_rate(sdi) != SR_OK)
 674                 return SR_ERR;
 675
 676         return SR_OK;
 677 }
 678
 679 static int dev_acquisition_start(const struct sr_dev_inst *sdi, void *cb_data)
 680 {
 681         GSList *l;
 682         gboolean digital_added;
 683         struct sr_probe *probe;
 684         struct dev_context *devc;
 685         struct sr_scpi_dev_inst *scpi;
 686
 687         if (sdi->status != SR_ST_ACTIVE)
 688                 return SR_ERR_DEV_CLOSED;
 689
 690         scpi = sdi->conn;
 691         devc = sdi->priv;
 692         digital_added = FALSE;
 693
 694         for (l = sdi->probes; l; l = l->next) {
 695                 probe = l->data;
 696                 if (!probe->enabled)
 697                         continue;
 698                 /* Only add a single digital probe. */
 699                 if (probe->type != SR_PROBE_LOGIC || !digital_added) {
 700                         devc->enabled_probes = g_slist_append(
 701                                         devc->enabled_probes, probe);
 702                         if (probe->type == SR_PROBE_LOGIC)
 703                                 digital_added = TRUE;
 704                 }
 705         }
 706
 707         if (!devc->enabled_probes)
 708                 return SR_ERR;
 709
 710         if (hmo_check_probes(devc->enabled_probes) != SR_OK) {
 711                 sr_err("Invalid probe configuration specified!");
 712                 return SR_ERR_NA;
 713         }
 714
 715         if (hmo_setup_probes(sdi) != SR_OK) {
 716                 sr_err("Failed to setup probe configuration!");
 717                 return SR_ERR;
 718         }
 719
 720         sr_scpi_source_add(scpi, G_IO_IN, 50, hmo_receive_data, (void *)sdi);
 721
 722         /* Send header packet to the session bus. */
 723         std_session_send_df_header(cb_data, LOG_PREFIX);
 724
 725         devc->current_probe = devc->enabled_probes;
 726
 727         return hmo_request_data(sdi);
 728 }
 729
 730 static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
 731 {
 732         struct dev_context *devc;
 733         struct sr_scpi_dev_inst *scpi;
 734         struct sr_datafeed_packet packet;
 735
 736         (void)cb_data;
 737
 738         packet.type = SR_DF_END;
 739         packet.payload = NULL;
 740         sr_session_send(sdi, &packet);
 741
 742         if (sdi->status != SR_ST_ACTIVE)
 743                 return SR_ERR_DEV_CLOSED;
 744
 745         devc = sdi->priv;
 746
 747         devc->num_frames = 0;
 748         g_slist_free(devc->enabled_probes);
 749         devc->enabled_probes = NULL;
 750         scpi = sdi->conn;
 751         sr_scpi_source_remove(scpi);
 752
 753         return SR_OK;
 754 }
 755
 756 SR_PRIV struct sr_dev_driver hameg_hmo_driver_info = {
 757         .name = "hameg-hmo",
 758         .longname = "Hameg HMO",
 759         .api_version = 1,
 760         .init = init,
 761         .cleanup = cleanup,
 762         .scan = scan,
 763         .dev_list = dev_list,
 764         .dev_clear = dev_clear,
 765         .config_get = config_get,
 766         .config_set = config_set,
 767         .config_list = config_list,
 768         .dev_open = dev_open,
 769         .dev_close = dev_close,
 770         .dev_acquisition_start = dev_acquisition_start,
 771         .dev_acquisition_stop = dev_acquisition_stop,
 772         .priv = NULL,
 773 };