src/hardware/hameg-hmo/api.c

   1 /*
   2  * This file is part of the libsigrok project.
   3  *
   4  * Copyright (C) 2013 poljar (Damir Jelić) <poljarinho@gmail.com>
   5  *
   6  * This program is free software: you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation, either version 3 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #include <stdlib.h>
  21 #include "protocol.h"
  22
  23 #define SERIALCOMM "115200/8n1/flow=1"
  24
  25 SR_PRIV struct sr_dev_driver hameg_hmo_driver_info;
  26 static struct sr_dev_driver *di = &hameg_hmo_driver_info;
  27
  28 static const char *manufacturers[] = {
  29         "HAMEG",
  30 };
  31
  32 static const uint32_t scanopts[] = {
  33         SR_CONF_CONN,
  34         SR_CONF_SERIALCOMM,
  35 };
  36
  37 enum {
  38         CG_INVALID = -1,
  39         CG_NONE,
  40         CG_ANALOG,
  41         CG_DIGITAL,
  42 };
  43
  44 static int init(struct sr_context *sr_ctx)
  45 {
  46         return std_init(sr_ctx, di, LOG_PREFIX);
  47 }
  48
  49 static int check_manufacturer(const char *manufacturer)
  50 {
  51         unsigned int i;
  52
  53         for (i = 0; i < ARRAY_SIZE(manufacturers); ++i)
  54                 if (!strcmp(manufacturer, manufacturers[i]))
  55                         return SR_OK;
  56
  57         return SR_ERR;
  58 }
  59
  60 static struct sr_dev_inst *hmo_probe_serial_device(struct sr_scpi_dev_inst *scpi)
  61 {
  62         struct sr_dev_inst *sdi;
  63         struct dev_context *devc;
  64         struct sr_scpi_hw_info *hw_info;
  65
  66         sdi = NULL;
  67         devc = NULL;
  68         hw_info = NULL;
  69
  70         if (sr_scpi_get_hw_id(scpi, &hw_info) != SR_OK) {
  71                 sr_info("Couldn't get IDN response.");
  72                 goto fail;
  73         }
  74
  75         if (check_manufacturer(hw_info->manufacturer) != SR_OK)
  76                 goto fail;
  77
  78         sdi = sr_dev_inst_new();
  79         sdi->status = SR_ST_ACTIVE;
  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 = di;
  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         if (!(devc = g_try_malloc0(sizeof(struct dev_context))))
  92                 goto fail;
  93
  94         sdi->priv = devc;
  95
  96         if (hmo_init_device(sdi) != SR_OK)
  97                 goto fail;
  98
  99         sr_scpi_close(sdi->conn);
 100
 101         sdi->status = SR_ST_INACTIVE;
 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         if (devc)
 111                 g_free(devc);
 112
 113         return NULL;
 114 }
 115
 116 static GSList *scan(GSList *options)
 117 {
 118         return sr_scpi_scan(di->priv, options, hmo_probe_serial_device);
 119 }
 120
 121 static GSList *dev_list(void)
 122 {
 123         return ((struct drv_context *)(di->priv))->instances;
 124 }
 125
 126 static void clear_helper(void *priv)
 127 {
 128         struct dev_context *devc;
 129
 130         devc = priv;
 131
 132         hmo_scope_state_free(devc->model_state);
 133
 134         g_free(devc->analog_groups);
 135         g_free(devc->digital_groups);
 136
 137         g_free(devc);
 138 }
 139
 140 static int dev_clear(void)
 141 {
 142         return std_dev_clear(di, clear_helper);
 143 }
 144
 145 static int dev_open(struct sr_dev_inst *sdi)
 146 {
 147         if (sdi->status != SR_ST_ACTIVE && sr_scpi_open(sdi->conn) != SR_OK)
 148                 return SR_ERR;
 149
 150         if (hmo_scope_state_get(sdi) != SR_OK)
 151                 return SR_ERR;
 152
 153         sdi->status = SR_ST_ACTIVE;
 154
 155         return SR_OK;
 156 }
 157
 158 static int dev_close(struct sr_dev_inst *sdi)
 159 {
 160         if (sdi->status == SR_ST_INACTIVE)
 161                 return SR_OK;
 162
 163         sr_scpi_close(sdi->conn);
 164
 165         sdi->status = SR_ST_INACTIVE;
 166
 167         return SR_OK;
 168 }
 169
 170 static int cleanup(void)
 171 {
 172         dev_clear();
 173
 174         return SR_OK;
 175 }
 176
 177 static int check_channel_group(struct dev_context *devc,
 178                              const struct sr_channel_group *cg)
 179 {
 180         unsigned int i;
 181         struct scope_config *model;
 182
 183         model = devc->model_config;
 184
 185         if (!cg)
 186                 return CG_NONE;
 187
 188         for (i = 0; i < model->analog_channels; ++i)
 189                 if (cg == devc->analog_groups[i])
 190                         return CG_ANALOG;
 191
 192         for (i = 0; i < model->digital_pods; ++i)
 193                 if (cg == devc->digital_groups[i])
 194                         return CG_DIGITAL;
 195
 196         sr_err("Invalid channel group specified.");
 197
 198         return CG_INVALID;
 199 }
 200
 201 static int config_get(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
 202                       const struct sr_channel_group *cg)
 203 {
 204         int ret, cg_type;
 205         unsigned int i;
 206         struct dev_context *devc;
 207         struct scope_config *model;
 208         struct scope_state *state;
 209
 210         if (!sdi || !(devc = sdi->priv))
 211                 return SR_ERR_ARG;
 212
 213         if ((cg_type = check_channel_group(devc, cg)) == CG_INVALID)
 214                 return SR_ERR;
 215
 216         ret = SR_ERR_NA;
 217         model = devc->model_config;
 218         state = devc->model_state;
 219
 220         switch (key) {
 221         case SR_CONF_NUM_TIMEBASE:
 222                 *data = g_variant_new_int32(model->num_xdivs);
 223                 ret = SR_OK;
 224                 break;
 225         case SR_CONF_TIMEBASE:
 226                 *data = g_variant_new("(tt)", (*model->timebases)[state->timebase][0],
 227                                       (*model->timebases)[state->timebase][1]);
 228                 ret = SR_OK;
 229                 break;
 230         case SR_CONF_NUM_VDIV:
 231                 if (cg_type == CG_NONE) {
 232                         sr_err("No channel group specified.");
 233                         return SR_ERR_CHANNEL_GROUP;
 234                 } else if (cg_type == CG_ANALOG) {
 235                         for (i = 0; i < model->analog_channels; ++i) {
 236                                 if (cg != devc->analog_groups[i])
 237                                         continue;
 238                                 *data = g_variant_new_int32(model->num_ydivs);
 239                                 ret = SR_OK;
 240                                 break;
 241                         }
 242
 243                 } else {
 244                         ret = SR_ERR_NA;
 245                 }
 246                 break;
 247         case SR_CONF_VDIV:
 248                 if (cg_type == CG_NONE) {
 249                         sr_err("No channel group specified.");
 250                         return SR_ERR_CHANNEL_GROUP;
 251                 } else if (cg_type == CG_ANALOG) {
 252                         for (i = 0; i < model->analog_channels; ++i) {
 253                                 if (cg != devc->analog_groups[i])
 254                                         continue;
 255                                 *data = g_variant_new("(tt)",
 256                                                       (*model->vdivs)[state->analog_channels[i].vdiv][0],
 257                                                       (*model->vdivs)[state->analog_channels[i].vdiv][1]);
 258                                 ret = SR_OK;
 259                                 break;
 260                         }
 261
 262                 } else {
 263                         ret = SR_ERR_NA;
 264                 }
 265                 break;
 266         case SR_CONF_TRIGGER_SOURCE:
 267                 *data = g_variant_new_string((*model->trigger_sources)[state->trigger_source]);
 268                 ret = SR_OK;
 269                 break;
 270         case SR_CONF_TRIGGER_SLOPE:
 271                 *data = g_variant_new_string((*model->trigger_slopes)[state->trigger_slope]);
 272                 ret = SR_OK;
 273                 break;
 274         case SR_CONF_HORIZ_TRIGGERPOS:
 275                 *data = g_variant_new_double(state->horiz_triggerpos);
 276                 ret = SR_OK;
 277                 break;
 278         case SR_CONF_COUPLING:
 279                 if (cg_type == CG_NONE) {
 280                         sr_err("No channel group specified.");
 281                         return SR_ERR_CHANNEL_GROUP;
 282                 } else if (cg_type == CG_ANALOG) {
 283                         for (i = 0; i < model->analog_channels; ++i) {
 284                                 if (cg != devc->analog_groups[i])
 285                                         continue;
 286                                 *data = g_variant_new_string((*model->coupling_options)[state->analog_channels[i].coupling]);
 287                                 ret = SR_OK;
 288                                 break;
 289                         }
 290
 291                 } else {
 292                         ret = SR_ERR_NA;
 293                 }
 294                 break;
 295         case SR_CONF_SAMPLERATE:
 296                 *data = g_variant_new_uint64(state->sample_rate);
 297                 ret = SR_OK;
 298                 break;
 299         default:
 300                 ret = SR_ERR_NA;
 301         }
 302
 303         return ret;
 304 }
 305
 306 static GVariant *build_tuples(const uint64_t (*array)[][2], unsigned int n)
 307 {
 308         unsigned int i;
 309         GVariant *rational[2];
 310         GVariantBuilder gvb;
 311
 312         g_variant_builder_init(&gvb, G_VARIANT_TYPE_ARRAY);
 313
 314         for (i = 0; i < n; i++) {
 315                 rational[0] = g_variant_new_uint64((*array)[i][0]);
 316                 rational[1] = g_variant_new_uint64((*array)[i][1]);
 317
 318                 /* FIXME: Valgrind reports a memory leak here. */
 319                 g_variant_builder_add_value(&gvb, g_variant_new_tuple(rational, 2));
 320         }
 321
 322         return g_variant_builder_end(&gvb);
 323 }
 324
 325 static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sdi,
 326                       const struct sr_channel_group *cg)
 327 {
 328         int ret, cg_type;
 329         unsigned int i, j;
 330         char command[MAX_COMMAND_SIZE], float_str[30];
 331         struct dev_context *devc;
 332         struct scope_config *model;
 333         struct scope_state *state;
 334         const char *tmp;
 335         uint64_t p, q;
 336         double tmp_d;
 337         gboolean update_sample_rate;
 338
 339         if (!sdi || !(devc = sdi->priv))
 340                 return SR_ERR_ARG;
 341
 342         if ((cg_type = check_channel_group(devc, cg)) == CG_INVALID)
 343                 return SR_ERR;
 344
 345         model = devc->model_config;
 346         state = devc->model_state;
 347         update_sample_rate = FALSE;
 348
 349         ret = SR_ERR_NA;
 350
 351         switch (key) {
 352         case SR_CONF_LIMIT_FRAMES:
 353                 devc->frame_limit = g_variant_get_uint64(data);
 354                 ret = SR_OK;
 355                 break;
 356         case SR_CONF_TRIGGER_SOURCE:
 357                 tmp = g_variant_get_string(data, NULL);
 358                 for (i = 0; (*model->trigger_sources)[i]; i++) {
 359                         if (g_strcmp0(tmp, (*model->trigger_sources)[i]) != 0)
 360                                 continue;
 361                         state->trigger_source = i;
 362                         g_snprintf(command, sizeof(command),
 363                                    (*model->scpi_dialect)[SCPI_CMD_SET_TRIGGER_SOURCE],
 364                                    (*model->trigger_sources)[i]);
 365
 366                         ret = sr_scpi_send(sdi->conn, command);
 367                         break;
 368                 }
 369                 break;
 370         case SR_CONF_VDIV:
 371                 if (cg_type == CG_NONE) {
 372                         sr_err("No channel group specified.");
 373                         return SR_ERR_CHANNEL_GROUP;
 374                 }
 375
 376                 g_variant_get(data, "(tt)", &p, &q);
 377
 378                 for (i = 0; i < model->num_vdivs; i++) {
 379                         if (p != (*model->vdivs)[i][0] ||
 380                             q != (*model->vdivs)[i][1])
 381                                 continue;
 382                         for (j = 1; j <= model->analog_channels; ++j) {
 383                                 if (cg != devc->analog_groups[j - 1])
 384                                         continue;
 385                                 state->analog_channels[j - 1].vdiv = i;
 386                                 g_ascii_formatd(float_str, sizeof(float_str), "%E", (float) p / q);
 387                                 g_snprintf(command, sizeof(command),
 388                                            (*model->scpi_dialect)[SCPI_CMD_SET_VERTICAL_DIV],
 389                                            j, float_str);
 390
 391                                 if (sr_scpi_send(sdi->conn, command) != SR_OK ||
 392                                     sr_scpi_get_opc(sdi->conn) != SR_OK)
 393                                         return SR_ERR;
 394
 395                                 break;
 396                         }
 397
 398                         ret = SR_OK;
 399                         break;
 400                 }
 401                 break;
 402         case SR_CONF_TIMEBASE:
 403                 g_variant_get(data, "(tt)", &p, &q);
 404
 405                 for (i = 0; i < model->num_timebases; i++) {
 406                         if (p != (*model->timebases)[i][0] ||
 407                             q != (*model->timebases)[i][1])
 408                                 continue;
 409                         state->timebase = i;
 410                         g_ascii_formatd(float_str, sizeof(float_str), "%E", (float) p / q);
 411                         g_snprintf(command, sizeof(command),
 412                                    (*model->scpi_dialect)[SCPI_CMD_SET_TIMEBASE],
 413                                    float_str);
 414
 415                         ret = sr_scpi_send(sdi->conn, command);
 416                         update_sample_rate = TRUE;
 417                         break;
 418                 }
 419                 break;
 420         case SR_CONF_HORIZ_TRIGGERPOS:
 421                 tmp_d = g_variant_get_double(data);
 422
 423                 if (tmp_d < 0.0 || tmp_d > 1.0)
 424                         return SR_ERR;
 425
 426                 state->horiz_triggerpos = tmp_d;
 427                 tmp_d = -(tmp_d - 0.5) *
 428                         ((double) (*model->timebases)[state->timebase][0] /
 429                         (*model->timebases)[state->timebase][1])
 430                          * model->num_xdivs;
 431
 432                 g_ascii_formatd(float_str, sizeof(float_str), "%E", tmp_d);
 433                 g_snprintf(command, sizeof(command),
 434                            (*model->scpi_dialect)[SCPI_CMD_SET_HORIZ_TRIGGERPOS],
 435                            float_str);
 436
 437                 ret = sr_scpi_send(sdi->conn, command);
 438                 break;
 439         case SR_CONF_TRIGGER_SLOPE:
 440                 tmp = g_variant_get_string(data, NULL);
 441
 442                 if (!tmp || !(tmp[0] == 'f' || tmp[0] == 'r'))
 443                         return SR_ERR_ARG;
 444
 445                 state->trigger_slope = (tmp[0] == 'r') ? 0 : 1;
 446
 447                 g_snprintf(command, sizeof(command),
 448                            (*model->scpi_dialect)[SCPI_CMD_SET_TRIGGER_SLOPE],
 449                            (state->trigger_slope == 0) ? "POS" : "NEG");
 450
 451                 ret = sr_scpi_send(sdi->conn, command);
 452                 break;
 453         case SR_CONF_COUPLING:
 454                 if (cg_type == CG_NONE) {
 455                         sr_err("No channel group specified.");
 456                         return SR_ERR_CHANNEL_GROUP;
 457                 }
 458
 459                 tmp = g_variant_get_string(data, NULL);
 460
 461                 for (i = 0; (*model->coupling_options)[i]; i++) {
 462                         if (strcmp(tmp, (*model->coupling_options)[i]) != 0)
 463                                 continue;
 464                         for (j = 1; j <= model->analog_channels; ++j) {
 465                                 if (cg != devc->analog_groups[j - 1])
 466                                         continue;
 467                                 state->analog_channels[j-1].coupling = i;
 468
 469                                 g_snprintf(command, sizeof(command),
 470                                            (*model->scpi_dialect)[SCPI_CMD_SET_COUPLING],
 471                                            j, tmp);
 472
 473                                 if (sr_scpi_send(sdi->conn, command) != SR_OK ||
 474                                     sr_scpi_get_opc(sdi->conn) != SR_OK)
 475                                         return SR_ERR;
 476                                 break;
 477                         }
 478
 479                         ret = SR_OK;
 480                         break;
 481                 }
 482                 break;
 483         default:
 484                 ret = SR_ERR_NA;
 485                 break;
 486         }
 487
 488         if (ret == SR_OK)
 489                 ret = sr_scpi_get_opc(sdi->conn);
 490
 491         if (ret == SR_OK && update_sample_rate)
 492                 ret = hmo_update_sample_rate(sdi);
 493
 494         return ret;
 495 }
 496
 497 static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
 498                        const struct sr_channel_group *cg)
 499 {
 500         int cg_type;
 501         struct dev_context *devc;
 502         struct scope_config *model;
 503
 504         if (!sdi || !(devc = sdi->priv))
 505                 return SR_ERR_ARG;
 506
 507         if ((cg_type = check_channel_group(devc, cg)) == CG_INVALID)
 508                 return SR_ERR;
 509
 510         model = devc->model_config;
 511
 512         switch (key) {
 513         case SR_CONF_SCAN_OPTIONS:
 514                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 515                                 scanopts, ARRAY_SIZE(scanopts), sizeof(uint32_t));
 516                 break;
 517         case SR_CONF_DEVICE_OPTIONS:
 518                 if (cg_type == CG_NONE) {
 519                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 520                                 model->devopts, model->num_devopts,
 521                                 sizeof(uint32_t));
 522                 } else if (cg_type == CG_ANALOG) {
 523                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 524                                 model->analog_devopts, model->num_analog_devopts,
 525                                 sizeof(uint32_t));
 526                 } else {
 527                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 528                                 NULL, 0, sizeof(uint32_t));
 529                 }
 530                 break;
 531         case SR_CONF_COUPLING:
 532                 if (cg_type == CG_NONE)
 533                         return SR_ERR_CHANNEL_GROUP;
 534                 *data = g_variant_new_strv(*model->coupling_options,
 535                            g_strv_length((char **)*model->coupling_options));
 536                 break;
 537         case SR_CONF_TRIGGER_SOURCE:
 538                 *data = g_variant_new_strv(*model->trigger_sources,
 539                            g_strv_length((char **)*model->trigger_sources));
 540                 break;
 541         case SR_CONF_TRIGGER_SLOPE:
 542                 *data = g_variant_new_strv(*model->trigger_slopes,
 543                            g_strv_length((char **)*model->trigger_slopes));
 544                 break;
 545         case SR_CONF_TIMEBASE:
 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         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         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, void *cb_data)
 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         /* Send header packet to the session bus. */
 754         std_session_send_df_header(cb_data, LOG_PREFIX);
 755
 756         devc->current_channel = devc->enabled_channels;
 757
 758         return hmo_request_data(sdi);
 759 }
 760
 761 static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
 762 {
 763         struct dev_context *devc;
 764         struct sr_scpi_dev_inst *scpi;
 765         struct sr_datafeed_packet packet;
 766
 767         (void)cb_data;
 768
 769         packet.type = SR_DF_END;
 770         packet.payload = NULL;
 771         sr_session_send(sdi, &packet);
 772
 773         if (sdi->status != SR_ST_ACTIVE)
 774                 return SR_ERR_DEV_CLOSED;
 775
 776         devc = sdi->priv;
 777
 778         devc->num_frames = 0;
 779         g_slist_free(devc->enabled_channels);
 780         devc->enabled_channels = NULL;
 781         scpi = sdi->conn;
 782         sr_scpi_source_remove(sdi->session, scpi);
 783
 784         return SR_OK;
 785 }
 786
 787 SR_PRIV struct sr_dev_driver hameg_hmo_driver_info = {
 788         .name = "hameg-hmo",
 789         .longname = "Hameg HMO",
 790         .api_version = 1,
 791         .init = init,
 792         .cleanup = cleanup,
 793         .scan = scan,
 794         .dev_list = dev_list,
 795         .dev_clear = dev_clear,
 796         .config_get = config_get,
 797         .config_set = config_set,
 798         .config_list = config_list,
 799         .dev_open = dev_open,
 800         .dev_close = dev_close,
 801         .dev_acquisition_start = dev_acquisition_start,
 802         .dev_acquisition_stop = dev_acquisition_stop,
 803         .priv = NULL,
 804 };