src/hardware/hameg-hmo/api.c

   1 /*
   2  * This file is part of the libsigrok project.
   3  *
   4  * Copyright (C) 2013 poljar (Damir Jelić) <poljarinho@gmail.com>
   5  *
   6  * This program is free software: you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation, either version 3 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #include <config.h>
  21 #include <stdlib.h>
  22 #include "scpi.h"
  23 #include "protocol.h"
  24
  25 #define SERIALCOMM "115200/8n1/flow=1"
  26
  27 static struct sr_dev_driver hameg_hmo_driver_info;
  28
  29 static const char *manufacturers[] = {
  30         "HAMEG",
  31         "Rohde&Schwarz",
  32 };
  33
  34 static const uint32_t drvopts[] = {
  35         SR_CONF_OSCILLOSCOPE,
  36 };
  37
  38 static const uint32_t scanopts[] = {
  39         SR_CONF_CONN,
  40         SR_CONF_SERIALCOMM,
  41 };
  42
  43 enum {
  44         CG_INVALID = -1,
  45         CG_NONE,
  46         CG_ANALOG,
  47         CG_DIGITAL,
  48 };
  49
  50 static int check_manufacturer(const char *manufacturer)
  51 {
  52         unsigned int i;
  53
  54         for (i = 0; i < ARRAY_SIZE(manufacturers); i++)
  55                 if (!strcmp(manufacturer, manufacturers[i]))
  56                         return SR_OK;
  57
  58         return SR_ERR;
  59 }
  60
  61 static struct sr_dev_inst *hmo_probe_serial_device(struct sr_scpi_dev_inst *scpi)
  62 {
  63         struct sr_dev_inst *sdi;
  64         struct dev_context *devc;
  65         struct sr_scpi_hw_info *hw_info;
  66
  67         sdi = NULL;
  68         devc = NULL;
  69         hw_info = NULL;
  70
  71         if (sr_scpi_get_hw_id(scpi, &hw_info) != SR_OK) {
  72                 sr_info("Couldn't get IDN response.");
  73                 goto fail;
  74         }
  75
  76         if (check_manufacturer(hw_info->manufacturer) != SR_OK)
  77                 goto fail;
  78
  79         sdi = g_malloc0(sizeof(struct sr_dev_inst));
  80         sdi->vendor = g_strdup(hw_info->manufacturer);
  81         sdi->model = g_strdup(hw_info->model);
  82         sdi->version = g_strdup(hw_info->firmware_version);
  83         sdi->serial_num = g_strdup(hw_info->serial_number);
  84         sdi->driver = &hameg_hmo_driver_info;
  85         sdi->inst_type = SR_INST_SCPI;
  86         sdi->conn = scpi;
  87
  88         sr_scpi_hw_info_free(hw_info);
  89         hw_info = NULL;
  90
  91         devc = g_malloc0(sizeof(struct dev_context));
  92
  93         sdi->priv = devc;
  94
  95         if (hmo_init_device(sdi) != SR_OK)
  96                 goto fail;
  97
  98         return sdi;
  99
 100 fail:
 101         sr_scpi_hw_info_free(hw_info);
 102         sr_dev_inst_free(sdi);
 103         g_free(devc);
 104
 105         return NULL;
 106 }
 107
 108 static GSList *scan(struct sr_dev_driver *di, GSList *options)
 109 {
 110         return sr_scpi_scan(di->context, options, hmo_probe_serial_device);
 111 }
 112
 113 static void clear_helper(void *priv)
 114 {
 115         struct dev_context *devc;
 116
 117         devc = priv;
 118
 119         hmo_scope_state_free(devc->model_state);
 120
 121         g_free(devc->analog_groups);
 122         g_free(devc->digital_groups);
 123
 124         g_free(devc);
 125 }
 126
 127 static int dev_clear(const struct sr_dev_driver *di)
 128 {
 129         return std_dev_clear(di, clear_helper);
 130 }
 131
 132 static int dev_open(struct sr_dev_inst *sdi)
 133 {
 134         if (sr_scpi_open(sdi->conn) != SR_OK)
 135                 return SR_ERR;
 136
 137         if (hmo_scope_state_get(sdi) != SR_OK)
 138                 return SR_ERR;
 139
 140         return SR_OK;
 141 }
 142
 143 static int dev_close(struct sr_dev_inst *sdi)
 144 {
 145         sr_scpi_close(sdi->conn);
 146
 147         sdi->status = SR_ST_INACTIVE;
 148
 149         return SR_OK;
 150 }
 151
 152 static int check_channel_group(struct dev_context *devc,
 153                              const struct sr_channel_group *cg)
 154 {
 155         unsigned int i;
 156         const struct scope_config *model;
 157
 158         model = devc->model_config;
 159
 160         if (!cg)
 161                 return CG_NONE;
 162
 163         for (i = 0; i < model->analog_channels; i++)
 164                 if (cg == devc->analog_groups[i])
 165                         return CG_ANALOG;
 166
 167         for (i = 0; i < model->digital_pods; i++)
 168                 if (cg == devc->digital_groups[i])
 169                         return CG_DIGITAL;
 170
 171         sr_err("Invalid channel group specified.");
 172
 173         return CG_INVALID;
 174 }
 175
 176 static int config_get(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
 177                       const struct sr_channel_group *cg)
 178 {
 179         int ret, cg_type;
 180         unsigned int i;
 181         struct dev_context *devc;
 182         const struct scope_config *model;
 183         struct scope_state *state;
 184
 185         if (!sdi)
 186                 return SR_ERR_ARG;
 187
 188         devc = sdi->priv;
 189
 190         if ((cg_type = check_channel_group(devc, cg)) == CG_INVALID)
 191                 return SR_ERR;
 192
 193         ret = SR_ERR_NA;
 194         model = devc->model_config;
 195         state = devc->model_state;
 196
 197         switch (key) {
 198         case SR_CONF_NUM_HDIV:
 199                 *data = g_variant_new_int32(model->num_xdivs);
 200                 ret = SR_OK;
 201                 break;
 202         case SR_CONF_TIMEBASE:
 203                 *data = g_variant_new("(tt)", (*model->timebases)[state->timebase][0],
 204                                       (*model->timebases)[state->timebase][1]);
 205                 ret = SR_OK;
 206                 break;
 207         case SR_CONF_NUM_VDIV:
 208                 if (cg_type == CG_NONE) {
 209                         sr_err("No channel group specified.");
 210                         return SR_ERR_CHANNEL_GROUP;
 211                 } else if (cg_type == CG_ANALOG) {
 212                         for (i = 0; i < model->analog_channels; i++) {
 213                                 if (cg != devc->analog_groups[i])
 214                                         continue;
 215                                 *data = g_variant_new_int32(model->num_ydivs);
 216                                 ret = SR_OK;
 217                                 break;
 218                         }
 219
 220                 } else {
 221                         ret = SR_ERR_NA;
 222                 }
 223                 break;
 224         case SR_CONF_VDIV:
 225                 if (cg_type == CG_NONE) {
 226                         sr_err("No channel group specified.");
 227                         return SR_ERR_CHANNEL_GROUP;
 228                 } else if (cg_type == CG_ANALOG) {
 229                         for (i = 0; i < model->analog_channels; i++) {
 230                                 if (cg != devc->analog_groups[i])
 231                                         continue;
 232                                 *data = g_variant_new("(tt)",
 233                                                       (*model->vdivs)[state->analog_channels[i].vdiv][0],
 234                                                       (*model->vdivs)[state->analog_channels[i].vdiv][1]);
 235                                 ret = SR_OK;
 236                                 break;
 237                         }
 238
 239                 } else {
 240                         ret = SR_ERR_NA;
 241                 }
 242                 break;
 243         case SR_CONF_TRIGGER_SOURCE:
 244                 *data = g_variant_new_string((*model->trigger_sources)[state->trigger_source]);
 245                 ret = SR_OK;
 246                 break;
 247         case SR_CONF_TRIGGER_SLOPE:
 248                 *data = g_variant_new_string((*model->trigger_slopes)[state->trigger_slope]);
 249                 ret = SR_OK;
 250                 break;
 251         case SR_CONF_HORIZ_TRIGGERPOS:
 252                 *data = g_variant_new_double(state->horiz_triggerpos);
 253                 ret = SR_OK;
 254                 break;
 255         case SR_CONF_COUPLING:
 256                 if (cg_type == CG_NONE) {
 257                         sr_err("No channel group specified.");
 258                         return SR_ERR_CHANNEL_GROUP;
 259                 } else if (cg_type == CG_ANALOG) {
 260                         for (i = 0; i < model->analog_channels; i++) {
 261                                 if (cg != 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(uint32_t key, GVariant *data, const struct sr_dev_inst *sdi,
 303                       const struct sr_channel_group *cg)
 304 {
 305         int ret, cg_type;
 306         unsigned int i, j;
 307         char command[MAX_COMMAND_SIZE], float_str[30];
 308         struct dev_context *devc;
 309         const 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)
 317                 return SR_ERR_ARG;
 318
 319         devc = sdi->priv;
 320
 321         if ((cg_type = check_channel_group(devc, cg)) == CG_INVALID)
 322                 return SR_ERR;
 323
 324         model = devc->model_config;
 325         state = devc->model_state;
 326         update_sample_rate = FALSE;
 327
 328         ret = SR_ERR_NA;
 329
 330         switch (key) {
 331         case SR_CONF_LIMIT_FRAMES:
 332                 devc->frame_limit = g_variant_get_uint64(data);
 333                 ret = SR_OK;
 334                 break;
 335         case SR_CONF_TRIGGER_SOURCE:
 336                 tmp = g_variant_get_string(data, NULL);
 337                 for (i = 0; (*model->trigger_sources)[i]; i++) {
 338                         if (g_strcmp0(tmp, (*model->trigger_sources)[i]) != 0)
 339                                 continue;
 340                         state->trigger_source = i;
 341                         g_snprintf(command, sizeof(command),
 342                                    (*model->scpi_dialect)[SCPI_CMD_SET_TRIGGER_SOURCE],
 343                                    (*model->trigger_sources)[i]);
 344
 345                         ret = sr_scpi_send(sdi->conn, command);
 346                         break;
 347                 }
 348                 break;
 349         case SR_CONF_VDIV:
 350                 if (cg_type == CG_NONE) {
 351                         sr_err("No channel group specified.");
 352                         return SR_ERR_CHANNEL_GROUP;
 353                 }
 354
 355                 g_variant_get(data, "(tt)", &p, &q);
 356
 357                 for (i = 0; i < model->num_vdivs; i++) {
 358                         if (p != (*model->vdivs)[i][0] ||
 359                             q != (*model->vdivs)[i][1])
 360                                 continue;
 361                         for (j = 1; j <= model->analog_channels; j++) {
 362                                 if (cg != devc->analog_groups[j - 1])
 363                                         continue;
 364                                 state->analog_channels[j - 1].vdiv = i;
 365                                 g_ascii_formatd(float_str, sizeof(float_str), "%E", (float) p / q);
 366                                 g_snprintf(command, sizeof(command),
 367                                            (*model->scpi_dialect)[SCPI_CMD_SET_VERTICAL_DIV],
 368                                            j, float_str);
 369
 370                                 if (sr_scpi_send(sdi->conn, command) != SR_OK ||
 371                                     sr_scpi_get_opc(sdi->conn) != SR_OK)
 372                                         return SR_ERR;
 373
 374                                 break;
 375                         }
 376
 377                         ret = SR_OK;
 378                         break;
 379                 }
 380                 break;
 381         case SR_CONF_TIMEBASE:
 382                 g_variant_get(data, "(tt)", &p, &q);
 383
 384                 for (i = 0; i < model->num_timebases; i++) {
 385                         if (p != (*model->timebases)[i][0] ||
 386                             q != (*model->timebases)[i][1])
 387                                 continue;
 388                         state->timebase = i;
 389                         g_ascii_formatd(float_str, sizeof(float_str), "%E", (float) p / q);
 390                         g_snprintf(command, sizeof(command),
 391                                    (*model->scpi_dialect)[SCPI_CMD_SET_TIMEBASE],
 392                                    float_str);
 393
 394                         ret = sr_scpi_send(sdi->conn, command);
 395                         update_sample_rate = TRUE;
 396                         break;
 397                 }
 398                 break;
 399         case SR_CONF_HORIZ_TRIGGERPOS:
 400                 tmp_d = g_variant_get_double(data);
 401
 402                 if (tmp_d < 0.0 || tmp_d > 1.0)
 403                         return SR_ERR;
 404
 405                 state->horiz_triggerpos = tmp_d;
 406                 tmp_d = -(tmp_d - 0.5) *
 407                         ((double) (*model->timebases)[state->timebase][0] /
 408                         (*model->timebases)[state->timebase][1])
 409                          * model->num_xdivs;
 410
 411                 g_ascii_formatd(float_str, sizeof(float_str), "%E", tmp_d);
 412                 g_snprintf(command, sizeof(command),
 413                            (*model->scpi_dialect)[SCPI_CMD_SET_HORIZ_TRIGGERPOS],
 414                            float_str);
 415
 416                 ret = sr_scpi_send(sdi->conn, command);
 417                 break;
 418         case SR_CONF_TRIGGER_SLOPE:
 419                 tmp = g_variant_get_string(data, NULL);
 420                 for (i = 0; (*model->trigger_slopes)[i]; i++) {
 421                         if (g_strcmp0(tmp, (*model->trigger_slopes)[i]) != 0)
 422                                 continue;
 423                         state->trigger_slope = i;
 424                         g_snprintf(command, sizeof(command),
 425                                    (*model->scpi_dialect)[SCPI_CMD_SET_TRIGGER_SLOPE],
 426                                    (*model->trigger_slopes)[i]);
 427
 428                         ret = sr_scpi_send(sdi->conn, command);
 429                         break;
 430                 }
 431                 break;
 432         case SR_CONF_COUPLING:
 433                 if (cg_type == CG_NONE) {
 434                         sr_err("No channel group specified.");
 435                         return SR_ERR_CHANNEL_GROUP;
 436                 }
 437
 438                 tmp = g_variant_get_string(data, NULL);
 439
 440                 for (i = 0; (*model->coupling_options)[i]; i++) {
 441                         if (strcmp(tmp, (*model->coupling_options)[i]) != 0)
 442                                 continue;
 443                         for (j = 1; j <= model->analog_channels; j++) {
 444                                 if (cg != devc->analog_groups[j - 1])
 445                                         continue;
 446                                 state->analog_channels[j-1].coupling = i;
 447
 448                                 g_snprintf(command, sizeof(command),
 449                                            (*model->scpi_dialect)[SCPI_CMD_SET_COUPLING],
 450                                            j, tmp);
 451
 452                                 if (sr_scpi_send(sdi->conn, command) != SR_OK ||
 453                                     sr_scpi_get_opc(sdi->conn) != SR_OK)
 454                                         return SR_ERR;
 455                                 break;
 456                         }
 457
 458                         ret = SR_OK;
 459                         break;
 460                 }
 461                 break;
 462         default:
 463                 ret = SR_ERR_NA;
 464                 break;
 465         }
 466
 467         if (ret == SR_OK)
 468                 ret = sr_scpi_get_opc(sdi->conn);
 469
 470         if (ret == SR_OK && update_sample_rate)
 471                 ret = hmo_update_sample_rate(sdi);
 472
 473         return ret;
 474 }
 475
 476 static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
 477                        const struct sr_channel_group *cg)
 478 {
 479         int cg_type = CG_NONE;
 480         struct dev_context *devc = NULL;
 481         const struct scope_config *model = NULL;
 482
 483         if (sdi) {
 484                 devc = sdi->priv;
 485                 if ((cg_type = check_channel_group(devc, cg)) == CG_INVALID)
 486                         return SR_ERR;
 487
 488                 model = devc->model_config;
 489         }
 490
 491         switch (key) {
 492         case SR_CONF_SCAN_OPTIONS:
 493                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 494                                 scanopts, ARRAY_SIZE(scanopts), sizeof(uint32_t));
 495                 break;
 496         case SR_CONF_DEVICE_OPTIONS:
 497                 if (cg_type == CG_NONE) {
 498                         if (model)
 499                                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 500                                         model->devopts, model->num_devopts, sizeof(uint32_t));
 501                         else
 502                                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 503                                         drvopts, ARRAY_SIZE(drvopts), sizeof(uint32_t));
 504                 } else if (cg_type == CG_ANALOG) {
 505                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 506                                 model->analog_devopts, model->num_analog_devopts,
 507                                 sizeof(uint32_t));
 508                 } else {
 509                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 510                                 NULL, 0, sizeof(uint32_t));
 511                 }
 512                 break;
 513         case SR_CONF_COUPLING:
 514                 if (cg_type == CG_NONE)
 515                         return SR_ERR_CHANNEL_GROUP;
 516                 *data = g_variant_new_strv(*model->coupling_options,
 517                            g_strv_length((char **)*model->coupling_options));
 518                 break;
 519         case SR_CONF_TRIGGER_SOURCE:
 520                 if (!model)
 521                         return SR_ERR_ARG;
 522                 *data = g_variant_new_strv(*model->trigger_sources,
 523                            g_strv_length((char **)*model->trigger_sources));
 524                 break;
 525         case SR_CONF_TRIGGER_SLOPE:
 526                 if (!model)
 527                         return SR_ERR_ARG;
 528                 *data = g_variant_new_strv(*model->trigger_slopes,
 529                            g_strv_length((char **)*model->trigger_slopes));
 530                 break;
 531         case SR_CONF_TIMEBASE:
 532                 if (!model)
 533                         return SR_ERR_ARG;
 534                 *data = build_tuples(model->timebases, model->num_timebases);
 535                 break;
 536         case SR_CONF_VDIV:
 537                 if (cg_type == CG_NONE)
 538                         return SR_ERR_CHANNEL_GROUP;
 539                 *data = build_tuples(model->vdivs, model->num_vdivs);
 540                 break;
 541         default:
 542                 return SR_ERR_NA;
 543         }
 544
 545         return SR_OK;
 546 }
 547
 548 SR_PRIV int hmo_request_data(const struct sr_dev_inst *sdi)
 549 {
 550         char command[MAX_COMMAND_SIZE];
 551         struct sr_channel *ch;
 552         struct dev_context *devc;
 553         const struct scope_config *model;
 554
 555         devc = sdi->priv;
 556         model = devc->model_config;
 557
 558         ch = devc->current_channel->data;
 559
 560         switch (ch->type) {
 561         case SR_CHANNEL_ANALOG:
 562                 g_snprintf(command, sizeof(command),
 563                            (*model->scpi_dialect)[SCPI_CMD_GET_ANALOG_DATA],
 564 #ifdef WORDS_BIGENDIAN
 565                            "MSBF",
 566 #else
 567                            "LSBF",
 568 #endif
 569                            ch->index + 1);
 570                 break;
 571         case SR_CHANNEL_LOGIC:
 572                 g_snprintf(command, sizeof(command),
 573                            (*model->scpi_dialect)[SCPI_CMD_GET_DIG_DATA],
 574                            ch->index < 8 ? 1 : 2);
 575                 break;
 576         default:
 577                 sr_err("Invalid channel type.");
 578                 break;
 579         }
 580
 581         return sr_scpi_send(sdi->conn, command);
 582 }
 583
 584 static int hmo_check_channels(GSList *channels)
 585 {
 586         GSList *l;
 587         struct sr_channel *ch;
 588         gboolean enabled_chan[MAX_ANALOG_CHANNEL_COUNT];
 589         gboolean enabled_pod[MAX_DIGITAL_GROUP_COUNT];
 590         size_t idx;
 591
 592         /* Preset "not enabled" for all channels / pods. */
 593         for (idx = 0; idx < ARRAY_SIZE(enabled_chan); idx++)
 594                 enabled_chan[idx] = FALSE;
 595         for (idx = 0; idx < ARRAY_SIZE(enabled_pod); idx++)
 596                 enabled_pod[idx] = FALSE;
 597
 598         /*
 599          * Determine which channels / pods are required for the caller's
 600          * specified configuration.
 601          */
 602         for (l = channels; l; l = l->next) {
 603                 ch = l->data;
 604                 switch (ch->type) {
 605                 case SR_CHANNEL_ANALOG:
 606                         idx = ch->index;
 607                         if (idx < ARRAY_SIZE(enabled_chan))
 608                                 enabled_chan[idx] = TRUE;
 609                         break;
 610                 case SR_CHANNEL_LOGIC:
 611                         idx = ch->index / 8;
 612                         if (idx < ARRAY_SIZE(enabled_pod))
 613                                 enabled_pod[idx] = TRUE;
 614                         break;
 615                 default:
 616                         return SR_ERR;
 617                 }
 618         }
 619
 620         /*
 621          * Check for resource conflicts. Some channels can be either
 622          * analog or digital, but never both at the same time.
 623          *
 624          * Note that the constraints might depend on the specific model.
 625          * These tests might need some adjustment when support for more
 626          * models gets added to the driver.
 627          */
 628         if (enabled_pod[0] && enabled_chan[2])
 629                 return SR_ERR;
 630         if (enabled_pod[1] && enabled_chan[3])
 631                 return SR_ERR;
 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)
 716 {
 717         GSList *l;
 718         gboolean digital_added[MAX_DIGITAL_GROUP_COUNT];
 719         size_t group, pod_count;
 720         struct sr_channel *ch;
 721         struct dev_context *devc;
 722         struct sr_scpi_dev_inst *scpi;
 723         int ret;
 724
 725         scpi = sdi->conn;
 726         devc = sdi->priv;
 727
 728         /* Preset empty results. */
 729         for (group = 0; group < ARRAY_SIZE(digital_added); group++)
 730                 digital_added[group] = FALSE;
 731         g_slist_free(devc->enabled_channels);
 732         devc->enabled_channels = NULL;
 733
 734         /*
 735          * Contruct the list of enabled channels. Determine the highest
 736          * number of digital pods involved in the acquisition.
 737          */
 738         pod_count = 0;
 739         for (l = sdi->channels; l; l = l->next) {
 740                 ch = l->data;
 741                 if (!ch->enabled)
 742                         continue;
 743                 /* Only add a single digital channel per group (pod). */
 744                 group = ch->index / 8;
 745                 if (ch->type != SR_CHANNEL_LOGIC || !digital_added[group]) {
 746                         devc->enabled_channels = g_slist_append(
 747                                         devc->enabled_channels, ch);
 748                         if (ch->type == SR_CHANNEL_LOGIC) {
 749                                 digital_added[group] = TRUE;
 750                                 if (pod_count < group + 1)
 751                                         pod_count = group + 1;
 752                         }
 753                 }
 754         }
 755         if (!devc->enabled_channels)
 756                 return SR_ERR;
 757         devc->pod_count = pod_count;
 758         devc->logic_data = NULL;
 759
 760         /*
 761          * Check constraints. Some channels can be either analog or
 762          * digital, but not both at the same time.
 763          */
 764         if (hmo_check_channels(devc->enabled_channels) != SR_OK) {
 765                 sr_err("Invalid channel configuration specified!");
 766                 ret = SR_ERR_NA;
 767                 goto free_enabled;
 768         }
 769
 770         /*
 771          * Configure the analog and digital channels and the
 772          * corresponding digital pods.
 773          */
 774         if (hmo_setup_channels(sdi) != SR_OK) {
 775                 sr_err("Failed to setup channel configuration!");
 776                 ret = SR_ERR;
 777                 goto free_enabled;
 778         }
 779
 780         /*
 781          * Start acquisition on the first enabled channel. The
 782          * receive routine will continue driving the acquisition.
 783          */
 784         sr_scpi_source_add(sdi->session, scpi, G_IO_IN, 50,
 785                         hmo_receive_data, (void *)sdi);
 786
 787         std_session_send_df_header(sdi);
 788
 789         devc->current_channel = devc->enabled_channels;
 790
 791         return hmo_request_data(sdi);
 792
 793 free_enabled:
 794         g_slist_free(devc->enabled_channels);
 795         devc->enabled_channels = NULL;
 796         return ret;
 797 }
 798
 799 static int dev_acquisition_stop(struct sr_dev_inst *sdi)
 800 {
 801         struct dev_context *devc;
 802         struct sr_scpi_dev_inst *scpi;
 803
 804         std_session_send_df_end(sdi);
 805
 806         devc = sdi->priv;
 807
 808         devc->num_frames = 0;
 809         g_slist_free(devc->enabled_channels);
 810         devc->enabled_channels = NULL;
 811         scpi = sdi->conn;
 812         sr_scpi_source_remove(sdi->session, scpi);
 813
 814         return SR_OK;
 815 }
 816
 817 static struct sr_dev_driver hameg_hmo_driver_info = {
 818         .name = "hameg-hmo",
 819         .longname = "Hameg HMO",
 820         .api_version = 1,
 821         .init = std_init,
 822         .cleanup = std_cleanup,
 823         .scan = scan,
 824         .dev_list = std_dev_list,
 825         .dev_clear = dev_clear,
 826         .config_get = config_get,
 827         .config_set = config_set,
 828         .config_list = config_list,
 829         .dev_open = dev_open,
 830         .dev_close = dev_close,
 831         .dev_acquisition_start = dev_acquisition_start,
 832         .dev_acquisition_stop = dev_acquisition_stop,
 833         .context = NULL,
 834 };
 835 SR_REGISTER_DEV_DRIVER(hameg_hmo_driver_info);