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 <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
  27 static const char *manufacturers[] = {
  28         "HAMEG",
  29 };
  30
  31 static const uint32_t drvopts[] = {
  32         SR_CONF_OSCILLOSCOPE,
  33 };
  34
  35 static const uint32_t scanopts[] = {
  36         SR_CONF_CONN,
  37         SR_CONF_SERIALCOMM,
  38 };
  39
  40 enum {
  41         CG_INVALID = -1,
  42         CG_NONE,
  43         CG_ANALOG,
  44         CG_DIGITAL,
  45 };
  46
  47 static int init(struct sr_dev_driver *di, struct sr_context *sr_ctx)
  48 {
  49         return std_init(sr_ctx, di, LOG_PREFIX);
  50 }
  51
  52 static int check_manufacturer(const char *manufacturer)
  53 {
  54         unsigned int i;
  55
  56         for (i = 0; i < ARRAY_SIZE(manufacturers); ++i)
  57                 if (!strcmp(manufacturer, manufacturers[i]))
  58                         return SR_OK;
  59
  60         return SR_ERR;
  61 }
  62
  63 static struct sr_dev_inst *hmo_probe_serial_device(struct sr_scpi_dev_inst *scpi)
  64 {
  65         struct sr_dev_inst *sdi;
  66         struct dev_context *devc;
  67         struct sr_scpi_hw_info *hw_info;
  68
  69         sdi = NULL;
  70         devc = NULL;
  71         hw_info = NULL;
  72
  73         if (sr_scpi_get_hw_id(scpi, &hw_info) != SR_OK) {
  74                 sr_info("Couldn't get IDN response.");
  75                 goto fail;
  76         }
  77
  78         if (check_manufacturer(hw_info->manufacturer) != SR_OK)
  79                 goto fail;
  80
  81         sdi = g_malloc0(sizeof(struct sr_dev_inst));
  82         sdi->status = SR_ST_ACTIVE;
  83         sdi->vendor = g_strdup(hw_info->manufacturer);
  84         sdi->model = g_strdup(hw_info->model);
  85         sdi->version = g_strdup(hw_info->firmware_version);
  86         sdi->serial_num = g_strdup(hw_info->serial_number);
  87         sdi->driver = &hameg_hmo_driver_info;
  88         sdi->inst_type = SR_INST_SCPI;
  89         sdi->conn = scpi;
  90
  91         sr_scpi_hw_info_free(hw_info);
  92         hw_info = NULL;
  93
  94         devc = g_malloc0(sizeof(struct dev_context));
  95
  96         sdi->priv = devc;
  97
  98         if (hmo_init_device(sdi) != SR_OK)
  99                 goto fail;
 100
 101         sr_scpi_close(sdi->conn);
 102
 103         sdi->status = SR_ST_INACTIVE;
 104
 105         return sdi;
 106
 107 fail:
 108         if (hw_info)
 109                 sr_scpi_hw_info_free(hw_info);
 110         if (sdi)
 111                 sr_dev_inst_free(sdi);
 112         g_free(devc);
 113
 114         return NULL;
 115 }
 116
 117 static GSList *scan(struct sr_dev_driver *di, GSList *options)
 118 {
 119         return sr_scpi_scan(di->context, options, hmo_probe_serial_device);
 120 }
 121
 122 static GSList *dev_list(const struct sr_dev_driver *di)
 123 {
 124         return ((struct drv_context *)(di->context))->instances;
 125 }
 126
 127 static void clear_helper(void *priv)
 128 {
 129         struct dev_context *devc;
 130
 131         devc = priv;
 132
 133         hmo_scope_state_free(devc->model_state);
 134
 135         g_free(devc->analog_groups);
 136         g_free(devc->digital_groups);
 137
 138         g_free(devc);
 139 }
 140
 141 static int dev_clear(const struct sr_dev_driver *di)
 142 {
 143         return std_dev_clear(di, clear_helper);
 144 }
 145
 146 static int dev_open(struct sr_dev_inst *sdi)
 147 {
 148         if (sdi->status != SR_ST_ACTIVE && sr_scpi_open(sdi->conn) != SR_OK)
 149                 return SR_ERR;
 150
 151         if (hmo_scope_state_get(sdi) != SR_OK)
 152                 return SR_ERR;
 153
 154         sdi->status = SR_ST_ACTIVE;
 155
 156         return SR_OK;
 157 }
 158
 159 static int dev_close(struct sr_dev_inst *sdi)
 160 {
 161         if (sdi->status == SR_ST_INACTIVE)
 162                 return SR_OK;
 163
 164         sr_scpi_close(sdi->conn);
 165
 166         sdi->status = SR_ST_INACTIVE;
 167
 168         return SR_OK;
 169 }
 170
 171 static int cleanup(const struct sr_dev_driver *di)
 172 {
 173         dev_clear(di);
 174
 175         return SR_OK;
 176 }
 177
 178 static int check_channel_group(struct dev_context *devc,
 179                              const struct sr_channel_group *cg)
 180 {
 181         unsigned int i;
 182         const struct scope_config *model;
 183
 184         model = devc->model_config;
 185
 186         if (!cg)
 187                 return CG_NONE;
 188
 189         for (i = 0; i < model->analog_channels; ++i)
 190                 if (cg == devc->analog_groups[i])
 191                         return CG_ANALOG;
 192
 193         for (i = 0; i < model->digital_pods; ++i)
 194                 if (cg == devc->digital_groups[i])
 195                         return CG_DIGITAL;
 196
 197         sr_err("Invalid channel group specified.");
 198
 199         return CG_INVALID;
 200 }
 201
 202 static int config_get(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
 203                       const struct sr_channel_group *cg)
 204 {
 205         int ret, cg_type;
 206         unsigned int i;
 207         struct dev_context *devc;
 208         const struct scope_config *model;
 209         struct scope_state *state;
 210
 211         if (!sdi || !(devc = sdi->priv))
 212                 return SR_ERR_ARG;
 213
 214         if ((cg_type = check_channel_group(devc, cg)) == CG_INVALID)
 215                 return SR_ERR;
 216
 217         ret = SR_ERR_NA;
 218         model = devc->model_config;
 219         state = devc->model_state;
 220
 221         switch (key) {
 222         case SR_CONF_NUM_HDIV:
 223                 *data = g_variant_new_int32(model->num_xdivs);
 224                 ret = SR_OK;
 225                 break;
 226         case SR_CONF_TIMEBASE:
 227                 *data = g_variant_new("(tt)", (*model->timebases)[state->timebase][0],
 228                                       (*model->timebases)[state->timebase][1]);
 229                 ret = SR_OK;
 230                 break;
 231         case SR_CONF_NUM_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_int32(model->num_ydivs);
 240                                 ret = SR_OK;
 241                                 break;
 242                         }
 243
 244                 } else {
 245                         ret = SR_ERR_NA;
 246                 }
 247                 break;
 248         case SR_CONF_VDIV:
 249                 if (cg_type == CG_NONE) {
 250                         sr_err("No channel group specified.");
 251                         return SR_ERR_CHANNEL_GROUP;
 252                 } else if (cg_type == CG_ANALOG) {
 253                         for (i = 0; i < model->analog_channels; ++i) {
 254                                 if (cg != devc->analog_groups[i])
 255                                         continue;
 256                                 *data = g_variant_new("(tt)",
 257                                                       (*model->vdivs)[state->analog_channels[i].vdiv][0],
 258                                                       (*model->vdivs)[state->analog_channels[i].vdiv][1]);
 259                                 ret = SR_OK;
 260                                 break;
 261                         }
 262
 263                 } else {
 264                         ret = SR_ERR_NA;
 265                 }
 266                 break;
 267         case SR_CONF_TRIGGER_SOURCE:
 268                 *data = g_variant_new_string((*model->trigger_sources)[state->trigger_source]);
 269                 ret = SR_OK;
 270                 break;
 271         case SR_CONF_TRIGGER_SLOPE:
 272                 *data = g_variant_new_string((*model->trigger_slopes)[state->trigger_slope]);
 273                 ret = SR_OK;
 274                 break;
 275         case SR_CONF_HORIZ_TRIGGERPOS:
 276                 *data = g_variant_new_double(state->horiz_triggerpos);
 277                 ret = SR_OK;
 278                 break;
 279         case SR_CONF_COUPLING:
 280                 if (cg_type == CG_NONE) {
 281                         sr_err("No channel group specified.");
 282                         return SR_ERR_CHANNEL_GROUP;
 283                 } else if (cg_type == CG_ANALOG) {
 284                         for (i = 0; i < model->analog_channels; ++i) {
 285                                 if (cg != devc->analog_groups[i])
 286                                         continue;
 287                                 *data = g_variant_new_string((*model->coupling_options)[state->analog_channels[i].coupling]);
 288                                 ret = SR_OK;
 289                                 break;
 290                         }
 291
 292                 } else {
 293                         ret = SR_ERR_NA;
 294                 }
 295                 break;
 296         case SR_CONF_SAMPLERATE:
 297                 *data = g_variant_new_uint64(state->sample_rate);
 298                 ret = SR_OK;
 299                 break;
 300         default:
 301                 ret = SR_ERR_NA;
 302         }
 303
 304         return ret;
 305 }
 306
 307 static GVariant *build_tuples(const uint64_t (*array)[][2], unsigned int n)
 308 {
 309         unsigned int i;
 310         GVariant *rational[2];
 311         GVariantBuilder gvb;
 312
 313         g_variant_builder_init(&gvb, G_VARIANT_TYPE_ARRAY);
 314
 315         for (i = 0; i < n; i++) {
 316                 rational[0] = g_variant_new_uint64((*array)[i][0]);
 317                 rational[1] = g_variant_new_uint64((*array)[i][1]);
 318
 319                 /* FIXME: Valgrind reports a memory leak here. */
 320                 g_variant_builder_add_value(&gvb, g_variant_new_tuple(rational, 2));
 321         }
 322
 323         return g_variant_builder_end(&gvb);
 324 }
 325
 326 static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sdi,
 327                       const struct sr_channel_group *cg)
 328 {
 329         int ret, cg_type;
 330         unsigned int i, j;
 331         char command[MAX_COMMAND_SIZE], float_str[30];
 332         struct dev_context *devc;
 333         const struct scope_config *model;
 334         struct scope_state *state;
 335         const char *tmp;
 336         uint64_t p, q;
 337         double tmp_d;
 338         gboolean update_sample_rate;
 339
 340         if (!sdi || !(devc = sdi->priv))
 341                 return SR_ERR_ARG;
 342
 343         if ((cg_type = check_channel_group(devc, cg)) == CG_INVALID)
 344                 return SR_ERR;
 345
 346         model = devc->model_config;
 347         state = devc->model_state;
 348         update_sample_rate = FALSE;
 349
 350         ret = SR_ERR_NA;
 351
 352         switch (key) {
 353         case SR_CONF_LIMIT_FRAMES:
 354                 devc->frame_limit = g_variant_get_uint64(data);
 355                 ret = SR_OK;
 356                 break;
 357         case SR_CONF_TRIGGER_SOURCE:
 358                 tmp = g_variant_get_string(data, NULL);
 359                 for (i = 0; (*model->trigger_sources)[i]; i++) {
 360                         if (g_strcmp0(tmp, (*model->trigger_sources)[i]) != 0)
 361                                 continue;
 362                         state->trigger_source = i;
 363                         g_snprintf(command, sizeof(command),
 364                                    (*model->scpi_dialect)[SCPI_CMD_SET_TRIGGER_SOURCE],
 365                                    (*model->trigger_sources)[i]);
 366
 367                         ret = sr_scpi_send(sdi->conn, command);
 368                         break;
 369                 }
 370                 break;
 371         case SR_CONF_VDIV:
 372                 if (cg_type == CG_NONE) {
 373                         sr_err("No channel group specified.");
 374                         return SR_ERR_CHANNEL_GROUP;
 375                 }
 376
 377                 g_variant_get(data, "(tt)", &p, &q);
 378
 379                 for (i = 0; i < model->num_vdivs; i++) {
 380                         if (p != (*model->vdivs)[i][0] ||
 381                             q != (*model->vdivs)[i][1])
 382                                 continue;
 383                         for (j = 1; j <= model->analog_channels; ++j) {
 384                                 if (cg != devc->analog_groups[j - 1])
 385                                         continue;
 386                                 state->analog_channels[j - 1].vdiv = 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_VERTICAL_DIV],
 390                                            j, float_str);
 391
 392                                 if (sr_scpi_send(sdi->conn, command) != SR_OK ||
 393                                     sr_scpi_get_opc(sdi->conn) != SR_OK)
 394                                         return SR_ERR;
 395
 396                                 break;
 397                         }
 398
 399                         ret = SR_OK;
 400                         break;
 401                 }
 402                 break;
 403         case SR_CONF_TIMEBASE:
 404                 g_variant_get(data, "(tt)", &p, &q);
 405
 406                 for (i = 0; i < model->num_timebases; i++) {
 407                         if (p != (*model->timebases)[i][0] ||
 408                             q != (*model->timebases)[i][1])
 409                                 continue;
 410                         state->timebase = i;
 411                         g_ascii_formatd(float_str, sizeof(float_str), "%E", (float) p / q);
 412                         g_snprintf(command, sizeof(command),
 413                                    (*model->scpi_dialect)[SCPI_CMD_SET_TIMEBASE],
 414                                    float_str);
 415
 416                         ret = sr_scpi_send(sdi->conn, command);
 417                         update_sample_rate = TRUE;
 418                         break;
 419                 }
 420                 break;
 421         case SR_CONF_HORIZ_TRIGGERPOS:
 422                 tmp_d = g_variant_get_double(data);
 423
 424                 if (tmp_d < 0.0 || tmp_d > 1.0)
 425                         return SR_ERR;
 426
 427                 state->horiz_triggerpos = tmp_d;
 428                 tmp_d = -(tmp_d - 0.5) *
 429                         ((double) (*model->timebases)[state->timebase][0] /
 430                         (*model->timebases)[state->timebase][1])
 431                          * model->num_xdivs;
 432
 433                 g_ascii_formatd(float_str, sizeof(float_str), "%E", tmp_d);
 434                 g_snprintf(command, sizeof(command),
 435                            (*model->scpi_dialect)[SCPI_CMD_SET_HORIZ_TRIGGERPOS],
 436                            float_str);
 437
 438                 ret = sr_scpi_send(sdi->conn, command);
 439                 break;
 440         case SR_CONF_TRIGGER_SLOPE:
 441                 tmp = g_variant_get_string(data, NULL);
 442
 443                 if (!tmp || !(tmp[0] == 'f' || tmp[0] == 'r'))
 444                         return SR_ERR_ARG;
 445
 446                 state->trigger_slope = (tmp[0] == 'r') ? 0 : 1;
 447
 448                 g_snprintf(command, sizeof(command),
 449                            (*model->scpi_dialect)[SCPI_CMD_SET_TRIGGER_SLOPE],
 450                            (state->trigger_slope == 0) ? "POS" : "NEG");
 451
 452                 ret = sr_scpi_send(sdi->conn, command);
 453                 break;
 454         case SR_CONF_COUPLING:
 455                 if (cg_type == CG_NONE) {
 456                         sr_err("No channel group specified.");
 457                         return SR_ERR_CHANNEL_GROUP;
 458                 }
 459
 460                 tmp = g_variant_get_string(data, NULL);
 461
 462                 for (i = 0; (*model->coupling_options)[i]; i++) {
 463                         if (strcmp(tmp, (*model->coupling_options)[i]) != 0)
 464                                 continue;
 465                         for (j = 1; j <= model->analog_channels; ++j) {
 466                                 if (cg != devc->analog_groups[j - 1])
 467                                         continue;
 468                                 state->analog_channels[j-1].coupling = i;
 469
 470                                 g_snprintf(command, sizeof(command),
 471                                            (*model->scpi_dialect)[SCPI_CMD_SET_COUPLING],
 472                                            j, tmp);
 473
 474                                 if (sr_scpi_send(sdi->conn, command) != SR_OK ||
 475                                     sr_scpi_get_opc(sdi->conn) != SR_OK)
 476                                         return SR_ERR;
 477                                 break;
 478                         }
 479
 480                         ret = SR_OK;
 481                         break;
 482                 }
 483                 break;
 484         default:
 485                 ret = SR_ERR_NA;
 486                 break;
 487         }
 488
 489         if (ret == SR_OK)
 490                 ret = sr_scpi_get_opc(sdi->conn);
 491
 492         if (ret == SR_OK && update_sample_rate)
 493                 ret = hmo_update_sample_rate(sdi);
 494
 495         return ret;
 496 }
 497
 498 static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
 499                        const struct sr_channel_group *cg)
 500 {
 501         int cg_type = CG_NONE;
 502         struct dev_context *devc = NULL;
 503         const struct scope_config *model = NULL;
 504
 505         if (sdi && (devc = sdi->priv)) {
 506                 if ((cg_type = check_channel_group(devc, cg)) == CG_INVALID)
 507                         return SR_ERR;
 508
 509                 model = devc->model_config;
 510         }
 511
 512         switch (key) {
 513         case SR_CONF_SCAN_OPTIONS:
 514                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 515                                 scanopts, ARRAY_SIZE(scanopts), sizeof(uint32_t));
 516                 break;
 517         case SR_CONF_DEVICE_OPTIONS:
 518                 if (cg_type == CG_NONE) {
 519                         if (model)
 520                                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 521                                         model->devopts, model->num_devopts, sizeof(uint32_t));
 522                         else
 523                                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 524                                         drvopts, ARRAY_SIZE(drvopts), sizeof(uint32_t));
 525                 } else if (cg_type == CG_ANALOG) {
 526                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 527                                 model->analog_devopts, model->num_analog_devopts,
 528                                 sizeof(uint32_t));
 529                 } else {
 530                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 531                                 NULL, 0, sizeof(uint32_t));
 532                 }
 533                 break;
 534         case SR_CONF_COUPLING:
 535                 if (cg_type == CG_NONE)
 536                         return SR_ERR_CHANNEL_GROUP;
 537                 *data = g_variant_new_strv(*model->coupling_options,
 538                            g_strv_length((char **)*model->coupling_options));
 539                 break;
 540         case SR_CONF_TRIGGER_SOURCE:
 541                 if (!model)
 542                         return SR_ERR_ARG;
 543                 *data = g_variant_new_strv(*model->trigger_sources,
 544                            g_strv_length((char **)*model->trigger_sources));
 545                 break;
 546         case SR_CONF_TRIGGER_SLOPE:
 547                 if (!model)
 548                         return SR_ERR_ARG;
 549                 *data = g_variant_new_strv(*model->trigger_slopes,
 550                            g_strv_length((char **)*model->trigger_slopes));
 551                 break;
 552         case SR_CONF_TIMEBASE:
 553                 if (!model)
 554                         return SR_ERR_ARG;
 555                 *data = build_tuples(model->timebases, model->num_timebases);
 556                 break;
 557         case SR_CONF_VDIV:
 558                 if (cg_type == CG_NONE)
 559                         return SR_ERR_CHANNEL_GROUP;
 560                 *data = build_tuples(model->vdivs, model->num_vdivs);
 561                 break;
 562         default:
 563                 return SR_ERR_NA;
 564         }
 565
 566         return SR_OK;
 567 }
 568
 569 SR_PRIV int hmo_request_data(const struct sr_dev_inst *sdi)
 570 {
 571         char command[MAX_COMMAND_SIZE];
 572         struct sr_channel *ch;
 573         struct dev_context *devc;
 574         const struct scope_config *model;
 575
 576         devc = sdi->priv;
 577         model = devc->model_config;
 578
 579         ch = devc->current_channel->data;
 580
 581         switch (ch->type) {
 582         case SR_CHANNEL_ANALOG:
 583                 g_snprintf(command, sizeof(command),
 584                            (*model->scpi_dialect)[SCPI_CMD_GET_ANALOG_DATA],
 585                            ch->index + 1);
 586                 break;
 587         case SR_CHANNEL_LOGIC:
 588                 g_snprintf(command, sizeof(command),
 589                            (*model->scpi_dialect)[SCPI_CMD_GET_DIG_DATA],
 590                            ch->index < 8 ? 1 : 2);
 591                 break;
 592         default:
 593                 sr_err("Invalid channel type.");
 594                 break;
 595         }
 596
 597         return sr_scpi_send(sdi->conn, command);
 598 }
 599
 600 static int hmo_check_channels(GSList *channels)
 601 {
 602         GSList *l;
 603         struct sr_channel *ch;
 604         gboolean enabled_pod1, enabled_pod2, enabled_chan3, enabled_chan4;
 605
 606         enabled_pod1 = enabled_pod2 = enabled_chan3 = enabled_chan4 = FALSE;
 607
 608         for (l = channels; l; l = l->next) {
 609                 ch = l->data;
 610                 switch (ch->type) {
 611                 case SR_CHANNEL_ANALOG:
 612                         if (ch->index == 2)
 613                                 enabled_chan3 = TRUE;
 614                         else if (ch->index == 3)
 615                                 enabled_chan4 = TRUE;
 616                         break;
 617                 case SR_CHANNEL_LOGIC:
 618                         if (ch->index < 8)
 619                                 enabled_pod1 = TRUE;
 620                         else
 621                                 enabled_pod2 = TRUE;
 622                         break;
 623                 default:
 624                         return SR_ERR;
 625                 }
 626         }
 627
 628         if ((enabled_pod1 && enabled_chan3) ||
 629             (enabled_pod2 && enabled_chan4))
 630                 return SR_ERR;
 631
 632         return SR_OK;
 633 }
 634
 635 static int hmo_setup_channels(const struct sr_dev_inst *sdi)
 636 {
 637         GSList *l;
 638         unsigned int i;
 639         gboolean *pod_enabled, setup_changed;
 640         char command[MAX_COMMAND_SIZE];
 641         struct scope_state *state;
 642         const struct scope_config *model;
 643         struct sr_channel *ch;
 644         struct dev_context *devc;
 645         struct sr_scpi_dev_inst *scpi;
 646
 647         devc = sdi->priv;
 648         scpi = sdi->conn;
 649         state = devc->model_state;
 650         model = devc->model_config;
 651         setup_changed = FALSE;
 652
 653         pod_enabled = g_try_malloc0(sizeof(gboolean) * model->digital_pods);
 654
 655         for (l = sdi->channels; l; l = l->next) {
 656                 ch = l->data;
 657                 switch (ch->type) {
 658                 case SR_CHANNEL_ANALOG:
 659                         if (ch->enabled == state->analog_channels[ch->index].state)
 660                                 break;
 661                         g_snprintf(command, sizeof(command),
 662                                    (*model->scpi_dialect)[SCPI_CMD_SET_ANALOG_CHAN_STATE],
 663                                    ch->index + 1, ch->enabled);
 664
 665                         if (sr_scpi_send(scpi, command) != SR_OK)
 666                                 return SR_ERR;
 667                         state->analog_channels[ch->index].state = ch->enabled;
 668                         setup_changed = TRUE;
 669                         break;
 670                 case SR_CHANNEL_LOGIC:
 671                         /*
 672                          * A digital POD needs to be enabled for every group of
 673                          * 8 channels.
 674                          */
 675                         if (ch->enabled)
 676                                 pod_enabled[ch->index < 8 ? 0 : 1] = TRUE;
 677
 678                         if (ch->enabled == state->digital_channels[ch->index])
 679                                 break;
 680                         g_snprintf(command, sizeof(command),
 681                                    (*model->scpi_dialect)[SCPI_CMD_SET_DIG_CHAN_STATE],
 682                                    ch->index, ch->enabled);
 683
 684                         if (sr_scpi_send(scpi, command) != SR_OK)
 685                                 return SR_ERR;
 686
 687                         state->digital_channels[ch->index] = ch->enabled;
 688                         setup_changed = TRUE;
 689                         break;
 690                 default:
 691                         return SR_ERR;
 692                 }
 693         }
 694
 695         for (i = 1; i <= model->digital_pods; ++i) {
 696                 if (state->digital_pods[i - 1] == pod_enabled[i - 1])
 697                         continue;
 698                 g_snprintf(command, sizeof(command),
 699                            (*model->scpi_dialect)[SCPI_CMD_SET_DIG_POD_STATE],
 700                            i, pod_enabled[i - 1]);
 701                 if (sr_scpi_send(scpi, command) != SR_OK)
 702                         return SR_ERR;
 703                 state->digital_pods[i - 1] = pod_enabled[i - 1];
 704                 setup_changed = TRUE;
 705         }
 706
 707         g_free(pod_enabled);
 708
 709         if (setup_changed && hmo_update_sample_rate(sdi) != SR_OK)
 710                 return SR_ERR;
 711
 712         return SR_OK;
 713 }
 714
 715 static int dev_acquisition_start(const struct sr_dev_inst *sdi, void *cb_data)
 716 {
 717         GSList *l;
 718         gboolean digital_added;
 719         struct sr_channel *ch;
 720         struct dev_context *devc;
 721         struct sr_scpi_dev_inst *scpi;
 722
 723         if (sdi->status != SR_ST_ACTIVE)
 724                 return SR_ERR_DEV_CLOSED;
 725
 726         scpi = sdi->conn;
 727         devc = sdi->priv;
 728         digital_added = FALSE;
 729
 730         g_slist_free(devc->enabled_channels);
 731         devc->enabled_channels = NULL;
 732
 733         for (l = sdi->channels; l; l = l->next) {
 734                 ch = l->data;
 735                 if (!ch->enabled)
 736                         continue;
 737                 /* Only add a single digital channel. */
 738                 if (ch->type != SR_CHANNEL_LOGIC || !digital_added) {
 739                         devc->enabled_channels = g_slist_append(
 740                                         devc->enabled_channels, ch);
 741                         if (ch->type == SR_CHANNEL_LOGIC)
 742                                 digital_added = TRUE;
 743                 }
 744         }
 745
 746         if (!devc->enabled_channels)
 747                 return SR_ERR;
 748
 749         if (hmo_check_channels(devc->enabled_channels) != SR_OK) {
 750                 sr_err("Invalid channel configuration specified!");
 751                 return SR_ERR_NA;
 752         }
 753
 754         if (hmo_setup_channels(sdi) != SR_OK) {
 755                 sr_err("Failed to setup channel configuration!");
 756                 return SR_ERR;
 757         }
 758
 759         sr_scpi_source_add(sdi->session, scpi, G_IO_IN, 50,
 760                         hmo_receive_data, (void *)sdi);
 761
 762         /* Send header packet to the session bus. */
 763         std_session_send_df_header(cb_data, LOG_PREFIX);
 764
 765         devc->current_channel = devc->enabled_channels;
 766
 767         return hmo_request_data(sdi);
 768 }
 769
 770 static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
 771 {
 772         struct dev_context *devc;
 773         struct sr_scpi_dev_inst *scpi;
 774         struct sr_datafeed_packet packet;
 775
 776         (void)cb_data;
 777
 778         packet.type = SR_DF_END;
 779         packet.payload = NULL;
 780         sr_session_send(sdi, &packet);
 781
 782         if (sdi->status != SR_ST_ACTIVE)
 783                 return SR_ERR_DEV_CLOSED;
 784
 785         devc = sdi->priv;
 786
 787         devc->num_frames = 0;
 788         g_slist_free(devc->enabled_channels);
 789         devc->enabled_channels = NULL;
 790         scpi = sdi->conn;
 791         sr_scpi_source_remove(sdi->session, scpi);
 792
 793         return SR_OK;
 794 }
 795
 796 SR_PRIV struct sr_dev_driver hameg_hmo_driver_info = {
 797         .name = "hameg-hmo",
 798         .longname = "Hameg HMO",
 799         .api_version = 1,
 800         .init = init,
 801         .cleanup = cleanup,
 802         .scan = scan,
 803         .dev_list = dev_list,
 804         .dev_clear = dev_clear,
 805         .config_get = config_get,
 806         .config_set = config_set,
 807         .config_list = config_list,
 808         .dev_open = dev_open,
 809         .dev_close = dev_close,
 810         .dev_acquisition_start = dev_acquisition_start,
 811         .dev_acquisition_stop = dev_acquisition_stop,
 812         .context = NULL,
 813 };