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 cleanup(const struct sr_dev_driver *di)
 170 {
 171         dev_clear(di);
 172
 173         return SR_OK;
 174 }
 175
 176 static int check_channel_group(struct dev_context *devc,
 177                              const struct sr_channel_group *cg)
 178 {
 179         unsigned int i;
 180         const struct scope_config *model;
 181
 182         model = devc->model_config;
 183
 184         if (!cg)
 185                 return CG_NONE;
 186
 187         for (i = 0; i < model->analog_channels; i++)
 188                 if (cg == devc->analog_groups[i])
 189                         return CG_ANALOG;
 190
 191         for (i = 0; i < model->digital_pods; i++)
 192                 if (cg == devc->digital_groups[i])
 193                         return CG_DIGITAL;
 194
 195         sr_err("Invalid channel group specified.");
 196
 197         return CG_INVALID;
 198 }
 199
 200 static int config_get(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
 201                       const struct sr_channel_group *cg)
 202 {
 203         int ret, cg_type;
 204         unsigned int i;
 205         struct dev_context *devc;
 206         const struct scope_config *model;
 207         struct scope_state *state;
 208
 209         if (!sdi || !(devc = sdi->priv))
 210                 return SR_ERR_ARG;
 211
 212         if ((cg_type = check_channel_group(devc, cg)) == CG_INVALID)
 213                 return SR_ERR;
 214
 215         ret = SR_ERR_NA;
 216         model = devc->model_config;
 217         state = devc->model_state;
 218
 219         switch (key) {
 220         case SR_CONF_NUM_HDIV:
 221                 *data = g_variant_new_int32(model->num_xdivs);
 222                 ret = SR_OK;
 223                 break;
 224         case SR_CONF_TIMEBASE:
 225                 *data = g_variant_new("(tt)", (*model->timebases)[state->timebase][0],
 226                                       (*model->timebases)[state->timebase][1]);
 227                 ret = SR_OK;
 228                 break;
 229         case SR_CONF_NUM_VDIV:
 230                 if (cg_type == CG_NONE) {
 231                         sr_err("No channel group specified.");
 232                         return SR_ERR_CHANNEL_GROUP;
 233                 } else if (cg_type == CG_ANALOG) {
 234                         for (i = 0; i < model->analog_channels; i++) {
 235                                 if (cg != devc->analog_groups[i])
 236                                         continue;
 237                                 *data = g_variant_new_int32(model->num_ydivs);
 238                                 ret = SR_OK;
 239                                 break;
 240                         }
 241
 242                 } else {
 243                         ret = SR_ERR_NA;
 244                 }
 245                 break;
 246         case SR_CONF_VDIV:
 247                 if (cg_type == CG_NONE) {
 248                         sr_err("No channel group specified.");
 249                         return SR_ERR_CHANNEL_GROUP;
 250                 } else if (cg_type == CG_ANALOG) {
 251                         for (i = 0; i < model->analog_channels; i++) {
 252                                 if (cg != devc->analog_groups[i])
 253                                         continue;
 254                                 *data = g_variant_new("(tt)",
 255                                                       (*model->vdivs)[state->analog_channels[i].vdiv][0],
 256                                                       (*model->vdivs)[state->analog_channels[i].vdiv][1]);
 257                                 ret = SR_OK;
 258                                 break;
 259                         }
 260
 261                 } else {
 262                         ret = SR_ERR_NA;
 263                 }
 264                 break;
 265         case SR_CONF_TRIGGER_SOURCE:
 266                 *data = g_variant_new_string((*model->trigger_sources)[state->trigger_source]);
 267                 ret = SR_OK;
 268                 break;
 269         case SR_CONF_TRIGGER_SLOPE:
 270                 *data = g_variant_new_string((*model->trigger_slopes)[state->trigger_slope]);
 271                 ret = SR_OK;
 272                 break;
 273         case SR_CONF_HORIZ_TRIGGERPOS:
 274                 *data = g_variant_new_double(state->horiz_triggerpos);
 275                 ret = SR_OK;
 276                 break;
 277         case SR_CONF_COUPLING:
 278                 if (cg_type == CG_NONE) {
 279                         sr_err("No channel group specified.");
 280                         return SR_ERR_CHANNEL_GROUP;
 281                 } else if (cg_type == CG_ANALOG) {
 282                         for (i = 0; i < model->analog_channels; i++) {
 283                                 if (cg != devc->analog_groups[i])
 284                                         continue;
 285                                 *data = g_variant_new_string((*model->coupling_options)[state->analog_channels[i].coupling]);
 286                                 ret = SR_OK;
 287                                 break;
 288                         }
 289
 290                 } else {
 291                         ret = SR_ERR_NA;
 292                 }
 293                 break;
 294         case SR_CONF_SAMPLERATE:
 295                 *data = g_variant_new_uint64(state->sample_rate);
 296                 ret = SR_OK;
 297                 break;
 298         default:
 299                 ret = SR_ERR_NA;
 300         }
 301
 302         return ret;
 303 }
 304
 305 static GVariant *build_tuples(const uint64_t (*array)[][2], unsigned int n)
 306 {
 307         unsigned int i;
 308         GVariant *rational[2];
 309         GVariantBuilder gvb;
 310
 311         g_variant_builder_init(&gvb, G_VARIANT_TYPE_ARRAY);
 312
 313         for (i = 0; i < n; i++) {
 314                 rational[0] = g_variant_new_uint64((*array)[i][0]);
 315                 rational[1] = g_variant_new_uint64((*array)[i][1]);
 316
 317                 /* FIXME: Valgrind reports a memory leak here. */
 318                 g_variant_builder_add_value(&gvb, g_variant_new_tuple(rational, 2));
 319         }
 320
 321         return g_variant_builder_end(&gvb);
 322 }
 323
 324 static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sdi,
 325                       const struct sr_channel_group *cg)
 326 {
 327         int ret, cg_type;
 328         unsigned int i, j;
 329         char command[MAX_COMMAND_SIZE], float_str[30];
 330         struct dev_context *devc;
 331         const struct scope_config *model;
 332         struct scope_state *state;
 333         const char *tmp;
 334         uint64_t p, q;
 335         double tmp_d;
 336         gboolean update_sample_rate;
 337
 338         if (!sdi || !(devc = sdi->priv))
 339                 return SR_ERR_ARG;
 340
 341         if ((cg_type = check_channel_group(devc, cg)) == CG_INVALID)
 342                 return SR_ERR;
 343
 344         model = devc->model_config;
 345         state = devc->model_state;
 346         update_sample_rate = FALSE;
 347
 348         ret = SR_ERR_NA;
 349
 350         switch (key) {
 351         case SR_CONF_LIMIT_FRAMES:
 352                 devc->frame_limit = g_variant_get_uint64(data);
 353                 ret = SR_OK;
 354                 break;
 355         case SR_CONF_TRIGGER_SOURCE:
 356                 tmp = g_variant_get_string(data, NULL);
 357                 for (i = 0; (*model->trigger_sources)[i]; i++) {
 358                         if (g_strcmp0(tmp, (*model->trigger_sources)[i]) != 0)
 359                                 continue;
 360                         state->trigger_source = i;
 361                         g_snprintf(command, sizeof(command),
 362                                    (*model->scpi_dialect)[SCPI_CMD_SET_TRIGGER_SOURCE],
 363                                    (*model->trigger_sources)[i]);
 364
 365                         ret = sr_scpi_send(sdi->conn, command);
 366                         break;
 367                 }
 368                 break;
 369         case SR_CONF_VDIV:
 370                 if (cg_type == CG_NONE) {
 371                         sr_err("No channel group specified.");
 372                         return SR_ERR_CHANNEL_GROUP;
 373                 }
 374
 375                 g_variant_get(data, "(tt)", &p, &q);
 376
 377                 for (i = 0; i < model->num_vdivs; i++) {
 378                         if (p != (*model->vdivs)[i][0] ||
 379                             q != (*model->vdivs)[i][1])
 380                                 continue;
 381                         for (j = 1; j <= model->analog_channels; j++) {
 382                                 if (cg != devc->analog_groups[j - 1])
 383                                         continue;
 384                                 state->analog_channels[j - 1].vdiv = i;
 385                                 g_ascii_formatd(float_str, sizeof(float_str), "%E", (float) p / q);
 386                                 g_snprintf(command, sizeof(command),
 387                                            (*model->scpi_dialect)[SCPI_CMD_SET_VERTICAL_DIV],
 388                                            j, float_str);
 389
 390                                 if (sr_scpi_send(sdi->conn, command) != SR_OK ||
 391                                     sr_scpi_get_opc(sdi->conn) != SR_OK)
 392                                         return SR_ERR;
 393
 394                                 break;
 395                         }
 396
 397                         ret = SR_OK;
 398                         break;
 399                 }
 400                 break;
 401         case SR_CONF_TIMEBASE:
 402                 g_variant_get(data, "(tt)", &p, &q);
 403
 404                 for (i = 0; i < model->num_timebases; i++) {
 405                         if (p != (*model->timebases)[i][0] ||
 406                             q != (*model->timebases)[i][1])
 407                                 continue;
 408                         state->timebase = i;
 409                         g_ascii_formatd(float_str, sizeof(float_str), "%E", (float) p / q);
 410                         g_snprintf(command, sizeof(command),
 411                                    (*model->scpi_dialect)[SCPI_CMD_SET_TIMEBASE],
 412                                    float_str);
 413
 414                         ret = sr_scpi_send(sdi->conn, command);
 415                         update_sample_rate = TRUE;
 416                         break;
 417                 }
 418                 break;
 419         case SR_CONF_HORIZ_TRIGGERPOS:
 420                 tmp_d = g_variant_get_double(data);
 421
 422                 if (tmp_d < 0.0 || tmp_d > 1.0)
 423                         return SR_ERR;
 424
 425                 state->horiz_triggerpos = tmp_d;
 426                 tmp_d = -(tmp_d - 0.5) *
 427                         ((double) (*model->timebases)[state->timebase][0] /
 428                         (*model->timebases)[state->timebase][1])
 429                          * model->num_xdivs;
 430
 431                 g_ascii_formatd(float_str, sizeof(float_str), "%E", tmp_d);
 432                 g_snprintf(command, sizeof(command),
 433                            (*model->scpi_dialect)[SCPI_CMD_SET_HORIZ_TRIGGERPOS],
 434                            float_str);
 435
 436                 ret = sr_scpi_send(sdi->conn, command);
 437                 break;
 438         case SR_CONF_TRIGGER_SLOPE:
 439                 tmp = g_variant_get_string(data, NULL);
 440                 for (i = 0; (*model->trigger_slopes)[i]; i++) {
 441                         if (g_strcmp0(tmp, (*model->trigger_slopes)[i]) != 0)
 442                                 continue;
 443                         state->trigger_slope = i;
 444                         g_snprintf(command, sizeof(command),
 445                                    (*model->scpi_dialect)[SCPI_CMD_SET_TRIGGER_SLOPE],
 446                                    (*model->trigger_slopes)[i]);
 447
 448                         ret = sr_scpi_send(sdi->conn, command);
 449                         break;
 450                 }
 451                 break;
 452         case SR_CONF_COUPLING:
 453                 if (cg_type == CG_NONE) {
 454                         sr_err("No channel group specified.");
 455                         return SR_ERR_CHANNEL_GROUP;
 456                 }
 457
 458                 tmp = g_variant_get_string(data, NULL);
 459
 460                 for (i = 0; (*model->coupling_options)[i]; i++) {
 461                         if (strcmp(tmp, (*model->coupling_options)[i]) != 0)
 462                                 continue;
 463                         for (j = 1; j <= model->analog_channels; j++) {
 464                                 if (cg != devc->analog_groups[j - 1])
 465                                         continue;
 466                                 state->analog_channels[j-1].coupling = i;
 467
 468                                 g_snprintf(command, sizeof(command),
 469                                            (*model->scpi_dialect)[SCPI_CMD_SET_COUPLING],
 470                                            j, tmp);
 471
 472                                 if (sr_scpi_send(sdi->conn, command) != SR_OK ||
 473                                     sr_scpi_get_opc(sdi->conn) != SR_OK)
 474                                         return SR_ERR;
 475                                 break;
 476                         }
 477
 478                         ret = SR_OK;
 479                         break;
 480                 }
 481                 break;
 482         default:
 483                 ret = SR_ERR_NA;
 484                 break;
 485         }
 486
 487         if (ret == SR_OK)
 488                 ret = sr_scpi_get_opc(sdi->conn);
 489
 490         if (ret == SR_OK && update_sample_rate)
 491                 ret = hmo_update_sample_rate(sdi);
 492
 493         return ret;
 494 }
 495
 496 static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
 497                        const struct sr_channel_group *cg)
 498 {
 499         int cg_type = CG_NONE;
 500         struct dev_context *devc = NULL;
 501         const struct scope_config *model = NULL;
 502
 503         if (sdi && (devc = sdi->priv)) {
 504                 if ((cg_type = check_channel_group(devc, cg)) == CG_INVALID)
 505                         return SR_ERR;
 506
 507                 model = devc->model_config;
 508         }
 509
 510         switch (key) {
 511         case SR_CONF_SCAN_OPTIONS:
 512                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 513                                 scanopts, ARRAY_SIZE(scanopts), sizeof(uint32_t));
 514                 break;
 515         case SR_CONF_DEVICE_OPTIONS:
 516                 if (cg_type == CG_NONE) {
 517                         if (model)
 518                                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 519                                         model->devopts, model->num_devopts, sizeof(uint32_t));
 520                         else
 521                                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 522                                         drvopts, ARRAY_SIZE(drvopts), sizeof(uint32_t));
 523                 } else if (cg_type == CG_ANALOG) {
 524                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 525                                 model->analog_devopts, model->num_analog_devopts,
 526                                 sizeof(uint32_t));
 527                 } else {
 528                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 529                                 NULL, 0, sizeof(uint32_t));
 530                 }
 531                 break;
 532         case SR_CONF_COUPLING:
 533                 if (cg_type == CG_NONE)
 534                         return SR_ERR_CHANNEL_GROUP;
 535                 *data = g_variant_new_strv(*model->coupling_options,
 536                            g_strv_length((char **)*model->coupling_options));
 537                 break;
 538         case SR_CONF_TRIGGER_SOURCE:
 539                 if (!model)
 540                         return SR_ERR_ARG;
 541                 *data = g_variant_new_strv(*model->trigger_sources,
 542                            g_strv_length((char **)*model->trigger_sources));
 543                 break;
 544         case SR_CONF_TRIGGER_SLOPE:
 545                 if (!model)
 546                         return SR_ERR_ARG;
 547                 *data = g_variant_new_strv(*model->trigger_slopes,
 548                            g_strv_length((char **)*model->trigger_slopes));
 549                 break;
 550         case SR_CONF_TIMEBASE:
 551                 if (!model)
 552                         return SR_ERR_ARG;
 553                 *data = build_tuples(model->timebases, model->num_timebases);
 554                 break;
 555         case SR_CONF_VDIV:
 556                 if (cg_type == CG_NONE)
 557                         return SR_ERR_CHANNEL_GROUP;
 558                 *data = build_tuples(model->vdivs, model->num_vdivs);
 559                 break;
 560         default:
 561                 return SR_ERR_NA;
 562         }
 563
 564         return SR_OK;
 565 }
 566
 567 SR_PRIV int hmo_request_data(const struct sr_dev_inst *sdi)
 568 {
 569         char command[MAX_COMMAND_SIZE];
 570         struct sr_channel *ch;
 571         struct dev_context *devc;
 572         const struct scope_config *model;
 573
 574         devc = sdi->priv;
 575         model = devc->model_config;
 576
 577         ch = devc->current_channel->data;
 578
 579         switch (ch->type) {
 580         case SR_CHANNEL_ANALOG:
 581                 g_snprintf(command, sizeof(command),
 582                            (*model->scpi_dialect)[SCPI_CMD_GET_ANALOG_DATA],
 583                            ch->index + 1);
 584                 break;
 585         case SR_CHANNEL_LOGIC:
 586                 g_snprintf(command, sizeof(command),
 587                            (*model->scpi_dialect)[SCPI_CMD_GET_DIG_DATA],
 588                            ch->index < 8 ? 1 : 2);
 589                 break;
 590         default:
 591                 sr_err("Invalid channel type.");
 592                 break;
 593         }
 594
 595         return sr_scpi_send(sdi->conn, command);
 596 }
 597
 598 static int hmo_check_channels(GSList *channels)
 599 {
 600         GSList *l;
 601         struct sr_channel *ch;
 602         gboolean enabled_pod1, enabled_pod2, enabled_chan3, enabled_chan4;
 603
 604         enabled_pod1 = enabled_pod2 = enabled_chan3 = enabled_chan4 = FALSE;
 605
 606         for (l = channels; l; l = l->next) {
 607                 ch = l->data;
 608                 switch (ch->type) {
 609                 case SR_CHANNEL_ANALOG:
 610                         if (ch->index == 2)
 611                                 enabled_chan3 = TRUE;
 612                         else if (ch->index == 3)
 613                                 enabled_chan4 = TRUE;
 614                         break;
 615                 case SR_CHANNEL_LOGIC:
 616                         if (ch->index < 8)
 617                                 enabled_pod1 = TRUE;
 618                         else
 619                                 enabled_pod2 = TRUE;
 620                         break;
 621                 default:
 622                         return SR_ERR;
 623                 }
 624         }
 625
 626         if ((enabled_pod1 && enabled_chan3) ||
 627             (enabled_pod2 && enabled_chan4))
 628                 return SR_ERR;
 629
 630         return SR_OK;
 631 }
 632
 633 static int hmo_setup_channels(const struct sr_dev_inst *sdi)
 634 {
 635         GSList *l;
 636         unsigned int i;
 637         gboolean *pod_enabled, setup_changed;
 638         char command[MAX_COMMAND_SIZE];
 639         struct scope_state *state;
 640         const struct scope_config *model;
 641         struct sr_channel *ch;
 642         struct dev_context *devc;
 643         struct sr_scpi_dev_inst *scpi;
 644
 645         devc = sdi->priv;
 646         scpi = sdi->conn;
 647         state = devc->model_state;
 648         model = devc->model_config;
 649         setup_changed = FALSE;
 650
 651         pod_enabled = g_try_malloc0(sizeof(gboolean) * model->digital_pods);
 652
 653         for (l = sdi->channels; l; l = l->next) {
 654                 ch = l->data;
 655                 switch (ch->type) {
 656                 case SR_CHANNEL_ANALOG:
 657                         if (ch->enabled == state->analog_channels[ch->index].state)
 658                                 break;
 659                         g_snprintf(command, sizeof(command),
 660                                    (*model->scpi_dialect)[SCPI_CMD_SET_ANALOG_CHAN_STATE],
 661                                    ch->index + 1, ch->enabled);
 662
 663                         if (sr_scpi_send(scpi, command) != SR_OK)
 664                                 return SR_ERR;
 665                         state->analog_channels[ch->index].state = ch->enabled;
 666                         setup_changed = TRUE;
 667                         break;
 668                 case SR_CHANNEL_LOGIC:
 669                         /*
 670                          * A digital POD needs to be enabled for every group of
 671                          * 8 channels.
 672                          */
 673                         if (ch->enabled)
 674                                 pod_enabled[ch->index < 8 ? 0 : 1] = TRUE;
 675
 676                         if (ch->enabled == state->digital_channels[ch->index])
 677                                 break;
 678                         g_snprintf(command, sizeof(command),
 679                                    (*model->scpi_dialect)[SCPI_CMD_SET_DIG_CHAN_STATE],
 680                                    ch->index, ch->enabled);
 681
 682                         if (sr_scpi_send(scpi, command) != SR_OK)
 683                                 return SR_ERR;
 684
 685                         state->digital_channels[ch->index] = ch->enabled;
 686                         setup_changed = TRUE;
 687                         break;
 688                 default:
 689                         return SR_ERR;
 690                 }
 691         }
 692
 693         for (i = 1; i <= model->digital_pods; i++) {
 694                 if (state->digital_pods[i - 1] == pod_enabled[i - 1])
 695                         continue;
 696                 g_snprintf(command, sizeof(command),
 697                            (*model->scpi_dialect)[SCPI_CMD_SET_DIG_POD_STATE],
 698                            i, pod_enabled[i - 1]);
 699                 if (sr_scpi_send(scpi, command) != SR_OK)
 700                         return SR_ERR;
 701                 state->digital_pods[i - 1] = pod_enabled[i - 1];
 702                 setup_changed = TRUE;
 703         }
 704
 705         g_free(pod_enabled);
 706
 707         if (setup_changed && hmo_update_sample_rate(sdi) != SR_OK)
 708                 return SR_ERR;
 709
 710         return SR_OK;
 711 }
 712
 713 static int dev_acquisition_start(const struct sr_dev_inst *sdi, void *cb_data)
 714 {
 715         GSList *l;
 716         gboolean digital_added;
 717         struct sr_channel *ch;
 718         struct dev_context *devc;
 719         struct sr_scpi_dev_inst *scpi;
 720
 721         if (sdi->status != SR_ST_ACTIVE)
 722                 return SR_ERR_DEV_CLOSED;
 723
 724         scpi = sdi->conn;
 725         devc = sdi->priv;
 726         digital_added = FALSE;
 727
 728         g_slist_free(devc->enabled_channels);
 729         devc->enabled_channels = NULL;
 730
 731         for (l = sdi->channels; l; l = l->next) {
 732                 ch = l->data;
 733                 if (!ch->enabled)
 734                         continue;
 735                 /* Only add a single digital channel. */
 736                 if (ch->type != SR_CHANNEL_LOGIC || !digital_added) {
 737                         devc->enabled_channels = g_slist_append(
 738                                         devc->enabled_channels, ch);
 739                         if (ch->type == SR_CHANNEL_LOGIC)
 740                                 digital_added = TRUE;
 741                 }
 742         }
 743
 744         if (!devc->enabled_channels)
 745                 return SR_ERR;
 746
 747         if (hmo_check_channels(devc->enabled_channels) != SR_OK) {
 748                 sr_err("Invalid channel configuration specified!");
 749                 return SR_ERR_NA;
 750         }
 751
 752         if (hmo_setup_channels(sdi) != SR_OK) {
 753                 sr_err("Failed to setup channel configuration!");
 754                 return SR_ERR;
 755         }
 756
 757         sr_scpi_source_add(sdi->session, scpi, G_IO_IN, 50,
 758                         hmo_receive_data, (void *)sdi);
 759
 760         std_session_send_df_header(cb_data, LOG_PREFIX);
 761
 762         devc->current_channel = devc->enabled_channels;
 763
 764         return hmo_request_data(sdi);
 765 }
 766
 767 static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
 768 {
 769         struct dev_context *devc;
 770         struct sr_scpi_dev_inst *scpi;
 771
 772         (void)cb_data;
 773
 774         std_session_send_df_end(sdi, LOG_PREFIX);
 775
 776         if (sdi->status != SR_ST_ACTIVE)
 777                 return SR_ERR_DEV_CLOSED;
 778
 779         devc = sdi->priv;
 780
 781         devc->num_frames = 0;
 782         g_slist_free(devc->enabled_channels);
 783         devc->enabled_channels = NULL;
 784         scpi = sdi->conn;
 785         sr_scpi_source_remove(sdi->session, scpi);
 786
 787         return SR_OK;
 788 }
 789
 790 SR_PRIV struct sr_dev_driver hameg_hmo_driver_info = {
 791         .name = "hameg-hmo",
 792         .longname = "Hameg HMO",
 793         .api_version = 1,
 794         .init = init,
 795         .cleanup = cleanup,
 796         .scan = scan,
 797         .dev_list = dev_list,
 798         .dev_clear = dev_clear,
 799         .config_get = config_get,
 800         .config_set = config_set,
 801         .config_list = config_list,
 802         .dev_open = dev_open,
 803         .dev_close = dev_close,
 804         .dev_acquisition_start = dev_acquisition_start,
 805         .dev_acquisition_stop = dev_acquisition_stop,
 806         .context = NULL,
 807 };