src/hardware/hameg-hmo/api.c

   1 /*
   2  * This file is part of the libsigrok project.
   3  *
   4  * Copyright (C) 2013 poljar (Damir Jelić) <poljarinho@gmail.com>
   5  *
   6  * This program is free software: you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation, either version 3 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #include <config.h>
  21 #include <stdlib.h>
  22 #include "scpi.h"
  23 #include "protocol.h"
  24
  25 #define SERIALCOMM "115200/8n1/flow=1"
  26
  27 SR_PRIV struct sr_dev_driver hameg_hmo_driver_info;
  28
  29 static const char *manufacturers[] = {
  30         "HAMEG",
  31         "Rohde&Schwarz",
  32 };
  33
  34 static const uint32_t drvopts[] = {
  35         SR_CONF_OSCILLOSCOPE,
  36 };
  37
  38 static const uint32_t scanopts[] = {
  39         SR_CONF_CONN,
  40         SR_CONF_SERIALCOMM,
  41 };
  42
  43 enum {
  44         CG_INVALID = -1,
  45         CG_NONE,
  46         CG_ANALOG,
  47         CG_DIGITAL,
  48 };
  49
  50 static int init(struct sr_dev_driver *di, struct sr_context *sr_ctx)
  51 {
  52         return std_init(sr_ctx, di, LOG_PREFIX);
  53 }
  54
  55 static int check_manufacturer(const char *manufacturer)
  56 {
  57         unsigned int i;
  58
  59         for (i = 0; i < ARRAY_SIZE(manufacturers); i++)
  60                 if (!strcmp(manufacturer, manufacturers[i]))
  61                         return SR_OK;
  62
  63         return SR_ERR;
  64 }
  65
  66 static struct sr_dev_inst *hmo_probe_serial_device(struct sr_scpi_dev_inst *scpi)
  67 {
  68         struct sr_dev_inst *sdi;
  69         struct dev_context *devc;
  70         struct sr_scpi_hw_info *hw_info;
  71
  72         sdi = NULL;
  73         devc = NULL;
  74         hw_info = NULL;
  75
  76         if (sr_scpi_get_hw_id(scpi, &hw_info) != SR_OK) {
  77                 sr_info("Couldn't get IDN response.");
  78                 goto fail;
  79         }
  80
  81         if (check_manufacturer(hw_info->manufacturer) != SR_OK)
  82                 goto fail;
  83
  84         sdi = g_malloc0(sizeof(struct sr_dev_inst));
  85         sdi->vendor = g_strdup(hw_info->manufacturer);
  86         sdi->model = g_strdup(hw_info->model);
  87         sdi->version = g_strdup(hw_info->firmware_version);
  88         sdi->serial_num = g_strdup(hw_info->serial_number);
  89         sdi->driver = &hameg_hmo_driver_info;
  90         sdi->inst_type = SR_INST_SCPI;
  91         sdi->conn = scpi;
  92
  93         sr_scpi_hw_info_free(hw_info);
  94         hw_info = NULL;
  95
  96         devc = g_malloc0(sizeof(struct dev_context));
  97
  98         sdi->priv = devc;
  99
 100         if (hmo_init_device(sdi) != SR_OK)
 101                 goto fail;
 102
 103         return sdi;
 104
 105 fail:
 106         if (hw_info)
 107                 sr_scpi_hw_info_free(hw_info);
 108         if (sdi)
 109                 sr_dev_inst_free(sdi);
 110         g_free(devc);
 111
 112         return NULL;
 113 }
 114
 115 static GSList *scan(struct sr_dev_driver *di, GSList *options)
 116 {
 117         return sr_scpi_scan(di->context, options, hmo_probe_serial_device);
 118 }
 119
 120 static GSList *dev_list(const struct sr_dev_driver *di)
 121 {
 122         return ((struct drv_context *)(di->context))->instances;
 123 }
 124
 125 static void clear_helper(void *priv)
 126 {
 127         struct dev_context *devc;
 128
 129         devc = priv;
 130
 131         hmo_scope_state_free(devc->model_state);
 132
 133         g_free(devc->analog_groups);
 134         g_free(devc->digital_groups);
 135
 136         g_free(devc);
 137 }
 138
 139 static int dev_clear(const struct sr_dev_driver *di)
 140 {
 141         return std_dev_clear(di, clear_helper);
 142 }
 143
 144 static int dev_open(struct sr_dev_inst *sdi)
 145 {
 146         if (sdi->status != SR_ST_ACTIVE && sr_scpi_open(sdi->conn) != SR_OK)
 147                 return SR_ERR;
 148
 149         if (hmo_scope_state_get(sdi) != SR_OK)
 150                 return SR_ERR;
 151
 152         sdi->status = SR_ST_ACTIVE;
 153
 154         return SR_OK;
 155 }
 156
 157 static int dev_close(struct sr_dev_inst *sdi)
 158 {
 159         if (sdi->status == SR_ST_INACTIVE)
 160                 return SR_OK;
 161
 162         sr_scpi_close(sdi->conn);
 163
 164         sdi->status = SR_ST_INACTIVE;
 165
 166         return SR_OK;
 167 }
 168
 169 static int check_channel_group(struct dev_context *devc,
 170                              const struct sr_channel_group *cg)
 171 {
 172         unsigned int i;
 173         const struct scope_config *model;
 174
 175         model = devc->model_config;
 176
 177         if (!cg)
 178                 return CG_NONE;
 179
 180         for (i = 0; i < model->analog_channels; i++)
 181                 if (cg == devc->analog_groups[i])
 182                         return CG_ANALOG;
 183
 184         for (i = 0; i < model->digital_pods; i++)
 185                 if (cg == devc->digital_groups[i])
 186                         return CG_DIGITAL;
 187
 188         sr_err("Invalid channel group specified.");
 189
 190         return CG_INVALID;
 191 }
 192
 193 static int config_get(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
 194                       const struct sr_channel_group *cg)
 195 {
 196         int ret, cg_type;
 197         unsigned int i;
 198         struct dev_context *devc;
 199         const struct scope_config *model;
 200         struct scope_state *state;
 201
 202         if (!sdi || !(devc = sdi->priv))
 203                 return SR_ERR_ARG;
 204
 205         if ((cg_type = check_channel_group(devc, cg)) == CG_INVALID)
 206                 return SR_ERR;
 207
 208         ret = SR_ERR_NA;
 209         model = devc->model_config;
 210         state = devc->model_state;
 211
 212         switch (key) {
 213         case SR_CONF_NUM_HDIV:
 214                 *data = g_variant_new_int32(model->num_xdivs);
 215                 ret = SR_OK;
 216                 break;
 217         case SR_CONF_TIMEBASE:
 218                 *data = g_variant_new("(tt)", (*model->timebases)[state->timebase][0],
 219                                       (*model->timebases)[state->timebase][1]);
 220                 ret = SR_OK;
 221                 break;
 222         case SR_CONF_NUM_VDIV:
 223                 if (cg_type == CG_NONE) {
 224                         sr_err("No channel group specified.");
 225                         return SR_ERR_CHANNEL_GROUP;
 226                 } else if (cg_type == CG_ANALOG) {
 227                         for (i = 0; i < model->analog_channels; i++) {
 228                                 if (cg != devc->analog_groups[i])
 229                                         continue;
 230                                 *data = g_variant_new_int32(model->num_ydivs);
 231                                 ret = SR_OK;
 232                                 break;
 233                         }
 234
 235                 } else {
 236                         ret = SR_ERR_NA;
 237                 }
 238                 break;
 239         case SR_CONF_VDIV:
 240                 if (cg_type == CG_NONE) {
 241                         sr_err("No channel group specified.");
 242                         return SR_ERR_CHANNEL_GROUP;
 243                 } else if (cg_type == CG_ANALOG) {
 244                         for (i = 0; i < model->analog_channels; i++) {
 245                                 if (cg != devc->analog_groups[i])
 246                                         continue;
 247                                 *data = g_variant_new("(tt)",
 248                                                       (*model->vdivs)[state->analog_channels[i].vdiv][0],
 249                                                       (*model->vdivs)[state->analog_channels[i].vdiv][1]);
 250                                 ret = SR_OK;
 251                                 break;
 252                         }
 253
 254                 } else {
 255                         ret = SR_ERR_NA;
 256                 }
 257                 break;
 258         case SR_CONF_TRIGGER_SOURCE:
 259                 *data = g_variant_new_string((*model->trigger_sources)[state->trigger_source]);
 260                 ret = SR_OK;
 261                 break;
 262         case SR_CONF_TRIGGER_SLOPE:
 263                 *data = g_variant_new_string((*model->trigger_slopes)[state->trigger_slope]);
 264                 ret = SR_OK;
 265                 break;
 266         case SR_CONF_HORIZ_TRIGGERPOS:
 267                 *data = g_variant_new_double(state->horiz_triggerpos);
 268                 ret = SR_OK;
 269                 break;
 270         case SR_CONF_COUPLING:
 271                 if (cg_type == CG_NONE) {
 272                         sr_err("No channel group specified.");
 273                         return SR_ERR_CHANNEL_GROUP;
 274                 } else if (cg_type == CG_ANALOG) {
 275                         for (i = 0; i < model->analog_channels; i++) {
 276                                 if (cg != devc->analog_groups[i])
 277                                         continue;
 278                                 *data = g_variant_new_string((*model->coupling_options)[state->analog_channels[i].coupling]);
 279                                 ret = SR_OK;
 280                                 break;
 281                         }
 282
 283                 } else {
 284                         ret = SR_ERR_NA;
 285                 }
 286                 break;
 287         case SR_CONF_SAMPLERATE:
 288                 *data = g_variant_new_uint64(state->sample_rate);
 289                 ret = SR_OK;
 290                 break;
 291         default:
 292                 ret = SR_ERR_NA;
 293         }
 294
 295         return ret;
 296 }
 297
 298 static GVariant *build_tuples(const uint64_t (*array)[][2], unsigned int n)
 299 {
 300         unsigned int i;
 301         GVariant *rational[2];
 302         GVariantBuilder gvb;
 303
 304         g_variant_builder_init(&gvb, G_VARIANT_TYPE_ARRAY);
 305
 306         for (i = 0; i < n; i++) {
 307                 rational[0] = g_variant_new_uint64((*array)[i][0]);
 308                 rational[1] = g_variant_new_uint64((*array)[i][1]);
 309
 310                 /* FIXME: Valgrind reports a memory leak here. */
 311                 g_variant_builder_add_value(&gvb, g_variant_new_tuple(rational, 2));
 312         }
 313
 314         return g_variant_builder_end(&gvb);
 315 }
 316
 317 static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sdi,
 318                       const struct sr_channel_group *cg)
 319 {
 320         int ret, cg_type;
 321         unsigned int i, j;
 322         char command[MAX_COMMAND_SIZE], float_str[30];
 323         struct dev_context *devc;
 324         const struct scope_config *model;
 325         struct scope_state *state;
 326         const char *tmp;
 327         uint64_t p, q;
 328         double tmp_d;
 329         gboolean update_sample_rate;
 330
 331         if (!sdi || !(devc = sdi->priv))
 332                 return SR_ERR_ARG;
 333
 334         if ((cg_type = check_channel_group(devc, cg)) == CG_INVALID)
 335                 return SR_ERR;
 336
 337         model = devc->model_config;
 338         state = devc->model_state;
 339         update_sample_rate = FALSE;
 340
 341         ret = SR_ERR_NA;
 342
 343         switch (key) {
 344         case SR_CONF_LIMIT_FRAMES:
 345                 devc->frame_limit = g_variant_get_uint64(data);
 346                 ret = SR_OK;
 347                 break;
 348         case SR_CONF_TRIGGER_SOURCE:
 349                 tmp = g_variant_get_string(data, NULL);
 350                 for (i = 0; (*model->trigger_sources)[i]; i++) {
 351                         if (g_strcmp0(tmp, (*model->trigger_sources)[i]) != 0)
 352                                 continue;
 353                         state->trigger_source = i;
 354                         g_snprintf(command, sizeof(command),
 355                                    (*model->scpi_dialect)[SCPI_CMD_SET_TRIGGER_SOURCE],
 356                                    (*model->trigger_sources)[i]);
 357
 358                         ret = sr_scpi_send(sdi->conn, command);
 359                         break;
 360                 }
 361                 break;
 362         case SR_CONF_VDIV:
 363                 if (cg_type == CG_NONE) {
 364                         sr_err("No channel group specified.");
 365                         return SR_ERR_CHANNEL_GROUP;
 366                 }
 367
 368                 g_variant_get(data, "(tt)", &p, &q);
 369
 370                 for (i = 0; i < model->num_vdivs; i++) {
 371                         if (p != (*model->vdivs)[i][0] ||
 372                             q != (*model->vdivs)[i][1])
 373                                 continue;
 374                         for (j = 1; j <= model->analog_channels; j++) {
 375                                 if (cg != devc->analog_groups[j - 1])
 376                                         continue;
 377                                 state->analog_channels[j - 1].vdiv = i;
 378                                 g_ascii_formatd(float_str, sizeof(float_str), "%E", (float) p / q);
 379                                 g_snprintf(command, sizeof(command),
 380                                            (*model->scpi_dialect)[SCPI_CMD_SET_VERTICAL_DIV],
 381                                            j, float_str);
 382
 383                                 if (sr_scpi_send(sdi->conn, command) != SR_OK ||
 384                                     sr_scpi_get_opc(sdi->conn) != SR_OK)
 385                                         return SR_ERR;
 386
 387                                 break;
 388                         }
 389
 390                         ret = SR_OK;
 391                         break;
 392                 }
 393                 break;
 394         case SR_CONF_TIMEBASE:
 395                 g_variant_get(data, "(tt)", &p, &q);
 396
 397                 for (i = 0; i < model->num_timebases; i++) {
 398                         if (p != (*model->timebases)[i][0] ||
 399                             q != (*model->timebases)[i][1])
 400                                 continue;
 401                         state->timebase = i;
 402                         g_ascii_formatd(float_str, sizeof(float_str), "%E", (float) p / q);
 403                         g_snprintf(command, sizeof(command),
 404                                    (*model->scpi_dialect)[SCPI_CMD_SET_TIMEBASE],
 405                                    float_str);
 406
 407                         ret = sr_scpi_send(sdi->conn, command);
 408                         update_sample_rate = TRUE;
 409                         break;
 410                 }
 411                 break;
 412         case SR_CONF_HORIZ_TRIGGERPOS:
 413                 tmp_d = g_variant_get_double(data);
 414
 415                 if (tmp_d < 0.0 || tmp_d > 1.0)
 416                         return SR_ERR;
 417
 418                 state->horiz_triggerpos = tmp_d;
 419                 tmp_d = -(tmp_d - 0.5) *
 420                         ((double) (*model->timebases)[state->timebase][0] /
 421                         (*model->timebases)[state->timebase][1])
 422                          * model->num_xdivs;
 423
 424                 g_ascii_formatd(float_str, sizeof(float_str), "%E", tmp_d);
 425                 g_snprintf(command, sizeof(command),
 426                            (*model->scpi_dialect)[SCPI_CMD_SET_HORIZ_TRIGGERPOS],
 427                            float_str);
 428
 429                 ret = sr_scpi_send(sdi->conn, command);
 430                 break;
 431         case SR_CONF_TRIGGER_SLOPE:
 432                 tmp = g_variant_get_string(data, NULL);
 433                 for (i = 0; (*model->trigger_slopes)[i]; i++) {
 434                         if (g_strcmp0(tmp, (*model->trigger_slopes)[i]) != 0)
 435                                 continue;
 436                         state->trigger_slope = i;
 437                         g_snprintf(command, sizeof(command),
 438                                    (*model->scpi_dialect)[SCPI_CMD_SET_TRIGGER_SLOPE],
 439                                    (*model->trigger_slopes)[i]);
 440
 441                         ret = sr_scpi_send(sdi->conn, command);
 442                         break;
 443                 }
 444                 break;
 445         case SR_CONF_COUPLING:
 446                 if (cg_type == CG_NONE) {
 447                         sr_err("No channel group specified.");
 448                         return SR_ERR_CHANNEL_GROUP;
 449                 }
 450
 451                 tmp = g_variant_get_string(data, NULL);
 452
 453                 for (i = 0; (*model->coupling_options)[i]; i++) {
 454                         if (strcmp(tmp, (*model->coupling_options)[i]) != 0)
 455                                 continue;
 456                         for (j = 1; j <= model->analog_channels; j++) {
 457                                 if (cg != devc->analog_groups[j - 1])
 458                                         continue;
 459                                 state->analog_channels[j-1].coupling = i;
 460
 461                                 g_snprintf(command, sizeof(command),
 462                                            (*model->scpi_dialect)[SCPI_CMD_SET_COUPLING],
 463                                            j, tmp);
 464
 465                                 if (sr_scpi_send(sdi->conn, command) != SR_OK ||
 466                                     sr_scpi_get_opc(sdi->conn) != SR_OK)
 467                                         return SR_ERR;
 468                                 break;
 469                         }
 470
 471                         ret = SR_OK;
 472                         break;
 473                 }
 474                 break;
 475         default:
 476                 ret = SR_ERR_NA;
 477                 break;
 478         }
 479
 480         if (ret == SR_OK)
 481                 ret = sr_scpi_get_opc(sdi->conn);
 482
 483         if (ret == SR_OK && update_sample_rate)
 484                 ret = hmo_update_sample_rate(sdi);
 485
 486         return ret;
 487 }
 488
 489 static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
 490                        const struct sr_channel_group *cg)
 491 {
 492         int cg_type = CG_NONE;
 493         struct dev_context *devc = NULL;
 494         const struct scope_config *model = NULL;
 495
 496         if (sdi && (devc = sdi->priv)) {
 497                 if ((cg_type = check_channel_group(devc, cg)) == CG_INVALID)
 498                         return SR_ERR;
 499
 500                 model = devc->model_config;
 501         }
 502
 503         switch (key) {
 504         case SR_CONF_SCAN_OPTIONS:
 505                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 506                                 scanopts, ARRAY_SIZE(scanopts), sizeof(uint32_t));
 507                 break;
 508         case SR_CONF_DEVICE_OPTIONS:
 509                 if (cg_type == CG_NONE) {
 510                         if (model)
 511                                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 512                                         model->devopts, model->num_devopts, sizeof(uint32_t));
 513                         else
 514                                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 515                                         drvopts, ARRAY_SIZE(drvopts), sizeof(uint32_t));
 516                 } else if (cg_type == CG_ANALOG) {
 517                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 518                                 model->analog_devopts, model->num_analog_devopts,
 519                                 sizeof(uint32_t));
 520                 } else {
 521                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 522                                 NULL, 0, sizeof(uint32_t));
 523                 }
 524                 break;
 525         case SR_CONF_COUPLING:
 526                 if (cg_type == CG_NONE)
 527                         return SR_ERR_CHANNEL_GROUP;
 528                 *data = g_variant_new_strv(*model->coupling_options,
 529                            g_strv_length((char **)*model->coupling_options));
 530                 break;
 531         case SR_CONF_TRIGGER_SOURCE:
 532                 if (!model)
 533                         return SR_ERR_ARG;
 534                 *data = g_variant_new_strv(*model->trigger_sources,
 535                            g_strv_length((char **)*model->trigger_sources));
 536                 break;
 537         case SR_CONF_TRIGGER_SLOPE:
 538                 if (!model)
 539                         return SR_ERR_ARG;
 540                 *data = g_variant_new_strv(*model->trigger_slopes,
 541                            g_strv_length((char **)*model->trigger_slopes));
 542                 break;
 543         case SR_CONF_TIMEBASE:
 544                 if (!model)
 545                         return SR_ERR_ARG;
 546                 *data = build_tuples(model->timebases, model->num_timebases);
 547                 break;
 548         case SR_CONF_VDIV:
 549                 if (cg_type == CG_NONE)
 550                         return SR_ERR_CHANNEL_GROUP;
 551                 *data = build_tuples(model->vdivs, model->num_vdivs);
 552                 break;
 553         default:
 554                 return SR_ERR_NA;
 555         }
 556
 557         return SR_OK;
 558 }
 559
 560 SR_PRIV int hmo_request_data(const struct sr_dev_inst *sdi)
 561 {
 562         char command[MAX_COMMAND_SIZE];
 563         struct sr_channel *ch;
 564         struct dev_context *devc;
 565         const struct scope_config *model;
 566
 567         devc = sdi->priv;
 568         model = devc->model_config;
 569
 570         ch = devc->current_channel->data;
 571
 572         switch (ch->type) {
 573         case SR_CHANNEL_ANALOG:
 574                 g_snprintf(command, sizeof(command),
 575                            (*model->scpi_dialect)[SCPI_CMD_GET_ANALOG_DATA],
 576                            ch->index + 1);
 577                 break;
 578         case SR_CHANNEL_LOGIC:
 579                 g_snprintf(command, sizeof(command),
 580                            (*model->scpi_dialect)[SCPI_CMD_GET_DIG_DATA],
 581                            ch->index < 8 ? 1 : 2);
 582                 break;
 583         default:
 584                 sr_err("Invalid channel type.");
 585                 break;
 586         }
 587
 588         return sr_scpi_send(sdi->conn, command);
 589 }
 590
 591 static int hmo_check_channels(GSList *channels)
 592 {
 593         GSList *l;
 594         struct sr_channel *ch;
 595         gboolean enabled_pod1, enabled_pod2, enabled_chan3, enabled_chan4;
 596
 597         enabled_pod1 = enabled_pod2 = enabled_chan3 = enabled_chan4 = FALSE;
 598
 599         for (l = channels; l; l = l->next) {
 600                 ch = l->data;
 601                 switch (ch->type) {
 602                 case SR_CHANNEL_ANALOG:
 603                         if (ch->index == 2)
 604                                 enabled_chan3 = TRUE;
 605                         else if (ch->index == 3)
 606                                 enabled_chan4 = TRUE;
 607                         break;
 608                 case SR_CHANNEL_LOGIC:
 609                         if (ch->index < 8)
 610                                 enabled_pod1 = TRUE;
 611                         else
 612                                 enabled_pod2 = TRUE;
 613                         break;
 614                 default:
 615                         return SR_ERR;
 616                 }
 617         }
 618
 619         if ((enabled_pod1 && enabled_chan3) ||
 620             (enabled_pod2 && enabled_chan4))
 621                 return SR_ERR;
 622
 623         return SR_OK;
 624 }
 625
 626 static int hmo_setup_channels(const struct sr_dev_inst *sdi)
 627 {
 628         GSList *l;
 629         unsigned int i;
 630         gboolean *pod_enabled, setup_changed;
 631         char command[MAX_COMMAND_SIZE];
 632         struct scope_state *state;
 633         const struct scope_config *model;
 634         struct sr_channel *ch;
 635         struct dev_context *devc;
 636         struct sr_scpi_dev_inst *scpi;
 637
 638         devc = sdi->priv;
 639         scpi = sdi->conn;
 640         state = devc->model_state;
 641         model = devc->model_config;
 642         setup_changed = FALSE;
 643
 644         pod_enabled = g_try_malloc0(sizeof(gboolean) * model->digital_pods);
 645
 646         for (l = sdi->channels; l; l = l->next) {
 647                 ch = l->data;
 648                 switch (ch->type) {
 649                 case SR_CHANNEL_ANALOG:
 650                         if (ch->enabled == state->analog_channels[ch->index].state)
 651                                 break;
 652                         g_snprintf(command, sizeof(command),
 653                                    (*model->scpi_dialect)[SCPI_CMD_SET_ANALOG_CHAN_STATE],
 654                                    ch->index + 1, ch->enabled);
 655
 656                         if (sr_scpi_send(scpi, command) != SR_OK)
 657                                 return SR_ERR;
 658                         state->analog_channels[ch->index].state = ch->enabled;
 659                         setup_changed = TRUE;
 660                         break;
 661                 case SR_CHANNEL_LOGIC:
 662                         /*
 663                          * A digital POD needs to be enabled for every group of
 664                          * 8 channels.
 665                          */
 666                         if (ch->enabled)
 667                                 pod_enabled[ch->index < 8 ? 0 : 1] = TRUE;
 668
 669                         if (ch->enabled == state->digital_channels[ch->index])
 670                                 break;
 671                         g_snprintf(command, sizeof(command),
 672                                    (*model->scpi_dialect)[SCPI_CMD_SET_DIG_CHAN_STATE],
 673                                    ch->index, ch->enabled);
 674
 675                         if (sr_scpi_send(scpi, command) != SR_OK)
 676                                 return SR_ERR;
 677
 678                         state->digital_channels[ch->index] = ch->enabled;
 679                         setup_changed = TRUE;
 680                         break;
 681                 default:
 682                         return SR_ERR;
 683                 }
 684         }
 685
 686         for (i = 1; i <= model->digital_pods; i++) {
 687                 if (state->digital_pods[i - 1] == pod_enabled[i - 1])
 688                         continue;
 689                 g_snprintf(command, sizeof(command),
 690                            (*model->scpi_dialect)[SCPI_CMD_SET_DIG_POD_STATE],
 691                            i, pod_enabled[i - 1]);
 692                 if (sr_scpi_send(scpi, command) != SR_OK)
 693                         return SR_ERR;
 694                 state->digital_pods[i - 1] = pod_enabled[i - 1];
 695                 setup_changed = TRUE;
 696         }
 697
 698         g_free(pod_enabled);
 699
 700         if (setup_changed && hmo_update_sample_rate(sdi) != SR_OK)
 701                 return SR_ERR;
 702
 703         return SR_OK;
 704 }
 705
 706 static int dev_acquisition_start(const struct sr_dev_inst *sdi)
 707 {
 708         GSList *l;
 709         gboolean digital_added;
 710         struct sr_channel *ch;
 711         struct dev_context *devc;
 712         struct sr_scpi_dev_inst *scpi;
 713
 714         if (sdi->status != SR_ST_ACTIVE)
 715                 return SR_ERR_DEV_CLOSED;
 716
 717         scpi = sdi->conn;
 718         devc = sdi->priv;
 719         digital_added = FALSE;
 720
 721         g_slist_free(devc->enabled_channels);
 722         devc->enabled_channels = NULL;
 723
 724         for (l = sdi->channels; l; l = l->next) {
 725                 ch = l->data;
 726                 if (!ch->enabled)
 727                         continue;
 728                 /* Only add a single digital channel. */
 729                 if (ch->type != SR_CHANNEL_LOGIC || !digital_added) {
 730                         devc->enabled_channels = g_slist_append(
 731                                         devc->enabled_channels, ch);
 732                         if (ch->type == SR_CHANNEL_LOGIC)
 733                                 digital_added = TRUE;
 734                 }
 735         }
 736
 737         if (!devc->enabled_channels)
 738                 return SR_ERR;
 739
 740         if (hmo_check_channels(devc->enabled_channels) != SR_OK) {
 741                 sr_err("Invalid channel configuration specified!");
 742                 return SR_ERR_NA;
 743         }
 744
 745         if (hmo_setup_channels(sdi) != SR_OK) {
 746                 sr_err("Failed to setup channel configuration!");
 747                 return SR_ERR;
 748         }
 749
 750         sr_scpi_source_add(sdi->session, scpi, G_IO_IN, 50,
 751                         hmo_receive_data, (void *)sdi);
 752
 753         std_session_send_df_header(sdi, LOG_PREFIX);
 754
 755         devc->current_channel = devc->enabled_channels;
 756
 757         return hmo_request_data(sdi);
 758 }
 759
 760 static int dev_acquisition_stop(struct sr_dev_inst *sdi)
 761 {
 762         struct dev_context *devc;
 763         struct sr_scpi_dev_inst *scpi;
 764
 765         std_session_send_df_end(sdi, LOG_PREFIX);
 766
 767         if (sdi->status != SR_ST_ACTIVE)
 768                 return SR_ERR_DEV_CLOSED;
 769
 770         devc = sdi->priv;
 771
 772         devc->num_frames = 0;
 773         g_slist_free(devc->enabled_channels);
 774         devc->enabled_channels = NULL;
 775         scpi = sdi->conn;
 776         sr_scpi_source_remove(sdi->session, scpi);
 777
 778         return SR_OK;
 779 }
 780
 781 SR_PRIV struct sr_dev_driver hameg_hmo_driver_info = {
 782         .name = "hameg-hmo",
 783         .longname = "Hameg HMO",
 784         .api_version = 1,
 785         .init = init,
 786         .cleanup = std_cleanup,
 787         .scan = scan,
 788         .dev_list = dev_list,
 789         .dev_clear = dev_clear,
 790         .config_get = config_get,
 791         .config_set = config_set,
 792         .config_list = config_list,
 793         .dev_open = dev_open,
 794         .dev_close = dev_close,
 795         .dev_acquisition_start = dev_acquisition_start,
 796         .dev_acquisition_stop = dev_acquisition_stop,
 797         .context = NULL,
 798 };