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 int32_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         if (!(sdi = sr_dev_inst_new(0, SR_ST_ACTIVE,
  79                                     hw_info->manufacturer, hw_info->model,
  80                                     hw_info->firmware_version))) {
  81                 goto fail;
  82         }
  83         sr_scpi_hw_info_free(hw_info);
  84         hw_info = NULL;
  85
  86         if (!(devc = g_try_malloc0(sizeof(struct dev_context))))
  87                 goto fail;
  88
  89         sdi->driver = di;
  90         sdi->priv = devc;
  91         sdi->inst_type = SR_INST_SCPI;
  92         sdi->conn = scpi;
  93
  94         if (hmo_init_device(sdi) != SR_OK)
  95                 goto fail;
  96
  97         sr_scpi_close(sdi->conn);
  98
  99         sdi->status = SR_ST_INACTIVE;
 100
 101         return sdi;
 102
 103 fail:
 104         if (hw_info)
 105                 sr_scpi_hw_info_free(hw_info);
 106         if (sdi)
 107                 sr_dev_inst_free(sdi);
 108         if (devc)
 109                 g_free(devc);
 110
 111         return NULL;
 112 }
 113
 114 static GSList *scan(GSList *options)
 115 {
 116         return sr_scpi_scan(di->priv, options, hmo_probe_serial_device);
 117 }
 118
 119 static GSList *dev_list(void)
 120 {
 121         return ((struct drv_context *)(di->priv))->instances;
 122 }
 123
 124 static void clear_helper(void *priv)
 125 {
 126         struct dev_context *devc;
 127
 128         devc = priv;
 129
 130         hmo_scope_state_free(devc->model_state);
 131
 132         g_free(devc->analog_groups);
 133         g_free(devc->digital_groups);
 134
 135         g_free(devc);
 136 }
 137
 138 static int dev_clear(void)
 139 {
 140         return std_dev_clear(di, clear_helper);
 141 }
 142
 143 static int dev_open(struct sr_dev_inst *sdi)
 144 {
 145         if (sdi->status != SR_ST_ACTIVE && sr_scpi_open(sdi->conn) != SR_OK)
 146                 return SR_ERR;
 147
 148         if (hmo_scope_state_get(sdi) != SR_OK)
 149                 return SR_ERR;
 150
 151         sdi->status = SR_ST_ACTIVE;
 152
 153         return SR_OK;
 154 }
 155
 156 static int dev_close(struct sr_dev_inst *sdi)
 157 {
 158         if (sdi->status == SR_ST_INACTIVE)
 159                 return SR_OK;
 160
 161         sr_scpi_close(sdi->conn);
 162
 163         sdi->status = SR_ST_INACTIVE;
 164
 165         return SR_OK;
 166 }
 167
 168 static int cleanup(void)
 169 {
 170         dev_clear();
 171
 172         return SR_OK;
 173 }
 174
 175 static int check_channel_group(struct dev_context *devc,
 176                              const struct sr_channel_group *cg)
 177 {
 178         unsigned int i;
 179         struct scope_config *model;
 180
 181         model = devc->model_config;
 182
 183         if (!cg)
 184                 return CG_NONE;
 185
 186         for (i = 0; i < model->analog_channels; ++i)
 187                 if (cg == devc->analog_groups[i])
 188                         return CG_ANALOG;
 189
 190         for (i = 0; i < model->digital_pods; ++i)
 191                 if (cg == devc->digital_groups[i])
 192                         return CG_DIGITAL;
 193
 194         sr_err("Invalid channel group specified.");
 195
 196         return CG_INVALID;
 197 }
 198
 199 static int config_get(int key, GVariant **data, const struct sr_dev_inst *sdi,
 200                       const struct sr_channel_group *cg)
 201 {
 202         int ret, cg_type;
 203         unsigned int i;
 204         struct dev_context *devc;
 205         struct scope_config *model;
 206         struct scope_state *state;
 207
 208         if (!sdi || !(devc = sdi->priv))
 209                 return SR_ERR_ARG;
 210
 211         if ((cg_type = check_channel_group(devc, cg)) == CG_INVALID)
 212                 return SR_ERR;
 213
 214         ret = SR_ERR_NA;
 215         model = devc->model_config;
 216         state = devc->model_state;
 217
 218         switch (key) {
 219         case SR_CONF_NUM_TIMEBASE:
 220                 *data = g_variant_new_int32(model->num_xdivs);
 221                 ret = SR_OK;
 222                 break;
 223         case SR_CONF_TIMEBASE:
 224                 *data = g_variant_new("(tt)", (*model->timebases)[state->timebase][0],
 225                                       (*model->timebases)[state->timebase][1]);
 226                 ret = SR_OK;
 227                 break;
 228         case SR_CONF_NUM_VDIV:
 229                 if (cg_type == CG_NONE) {
 230                         sr_err("No channel group specified.");
 231                         return SR_ERR_CHANNEL_GROUP;
 232                 } else if (cg_type == CG_ANALOG) {
 233                         for (i = 0; i < model->analog_channels; ++i) {
 234                                 if (cg != devc->analog_groups[i])
 235                                         continue;
 236                                 *data = g_variant_new_int32(model->num_ydivs);
 237                                 ret = SR_OK;
 238                                 break;
 239                         }
 240
 241                 } else {
 242                         ret = SR_ERR_NA;
 243                 }
 244                 break;
 245         case SR_CONF_VDIV:
 246                 if (cg_type == CG_NONE) {
 247                         sr_err("No channel group specified.");
 248                         return SR_ERR_CHANNEL_GROUP;
 249                 } else if (cg_type == CG_ANALOG) {
 250                         for (i = 0; i < model->analog_channels; ++i) {
 251                                 if (cg != devc->analog_groups[i])
 252                                         continue;
 253                                 *data = g_variant_new("(tt)",
 254                                                       (*model->vdivs)[state->analog_channels[i].vdiv][0],
 255                                                       (*model->vdivs)[state->analog_channels[i].vdiv][1]);
 256                                 ret = SR_OK;
 257                                 break;
 258                         }
 259
 260                 } else {
 261                         ret = SR_ERR_NA;
 262                 }
 263                 break;
 264         case SR_CONF_TRIGGER_SOURCE:
 265                 *data = g_variant_new_string((*model->trigger_sources)[state->trigger_source]);
 266                 ret = SR_OK;
 267                 break;
 268         case SR_CONF_TRIGGER_SLOPE:
 269                 *data = g_variant_new_string((*model->trigger_slopes)[state->trigger_slope]);
 270                 ret = SR_OK;
 271                 break;
 272         case SR_CONF_HORIZ_TRIGGERPOS:
 273                 *data = g_variant_new_double(state->horiz_triggerpos);
 274                 ret = SR_OK;
 275                 break;
 276         case SR_CONF_COUPLING:
 277                 if (cg_type == CG_NONE) {
 278                         sr_err("No channel group specified.");
 279                         return SR_ERR_CHANNEL_GROUP;
 280                 } else if (cg_type == CG_ANALOG) {
 281                         for (i = 0; i < model->analog_channels; ++i) {
 282                                 if (cg != devc->analog_groups[i])
 283                                         continue;
 284                                 *data = g_variant_new_string((*model->coupling_options)[state->analog_channels[i].coupling]);
 285                                 ret = SR_OK;
 286                                 break;
 287                         }
 288
 289                 } else {
 290                         ret = SR_ERR_NA;
 291                 }
 292                 break;
 293         case SR_CONF_SAMPLERATE:
 294                 *data = g_variant_new_uint64(state->sample_rate);
 295                 ret = SR_OK;
 296                 break;
 297         default:
 298                 ret = SR_ERR_NA;
 299         }
 300
 301         return ret;
 302 }
 303
 304 static GVariant *build_tuples(const uint64_t (*array)[][2], unsigned int n)
 305 {
 306         unsigned int i;
 307         GVariant *rational[2];
 308         GVariantBuilder gvb;
 309
 310         g_variant_builder_init(&gvb, G_VARIANT_TYPE_ARRAY);
 311
 312         for (i = 0; i < n; i++) {
 313                 rational[0] = g_variant_new_uint64((*array)[i][0]);
 314                 rational[1] = g_variant_new_uint64((*array)[i][1]);
 315
 316                 /* FIXME: Valgrind reports a memory leak here. */
 317                 g_variant_builder_add_value(&gvb, g_variant_new_tuple(rational, 2));
 318         }
 319
 320         return g_variant_builder_end(&gvb);
 321 }
 322
 323 static int config_set(int key, GVariant *data, const struct sr_dev_inst *sdi,
 324                       const struct sr_channel_group *cg)
 325 {
 326         int ret, cg_type;
 327         unsigned int i, j;
 328         char command[MAX_COMMAND_SIZE], float_str[30];
 329         struct dev_context *devc;
 330         struct scope_config *model;
 331         struct scope_state *state;
 332         const char *tmp;
 333         uint64_t p, q;
 334         double tmp_d;
 335         gboolean update_sample_rate;
 336
 337         if (!sdi || !(devc = sdi->priv))
 338                 return SR_ERR_ARG;
 339
 340         if ((cg_type = check_channel_group(devc, cg)) == CG_INVALID)
 341                 return SR_ERR;
 342
 343         model = devc->model_config;
 344         state = devc->model_state;
 345         update_sample_rate = FALSE;
 346
 347         ret = SR_ERR_NA;
 348
 349         switch (key) {
 350         case SR_CONF_LIMIT_FRAMES:
 351                 devc->frame_limit = g_variant_get_uint64(data);
 352                 ret = SR_OK;
 353                 break;
 354         case SR_CONF_TRIGGER_SOURCE:
 355                 tmp = g_variant_get_string(data, NULL);
 356                 for (i = 0; (*model->trigger_sources)[i]; i++) {
 357                         if (g_strcmp0(tmp, (*model->trigger_sources)[i]) != 0)
 358                                 continue;
 359                         state->trigger_source = i;
 360                         g_snprintf(command, sizeof(command),
 361                                    (*model->scpi_dialect)[SCPI_CMD_SET_TRIGGER_SOURCE],
 362                                    (*model->trigger_sources)[i]);
 363
 364                         ret = sr_scpi_send(sdi->conn, command);
 365                         break;
 366                 }
 367                 break;
 368         case SR_CONF_VDIV:
 369                 if (cg_type == CG_NONE) {
 370                         sr_err("No channel group specified.");
 371                         return SR_ERR_CHANNEL_GROUP;
 372                 }
 373
 374                 g_variant_get(data, "(tt)", &p, &q);
 375
 376                 for (i = 0; i < model->num_vdivs; i++) {
 377                         if (p != (*model->vdivs)[i][0] ||
 378                             q != (*model->vdivs)[i][1])
 379                                 continue;
 380                         for (j = 1; j <= model->analog_channels; ++j) {
 381                                 if (cg != devc->analog_groups[j - 1])
 382                                         continue;
 383                                 state->analog_channels[j - 1].vdiv = i;
 384                                 g_ascii_formatd(float_str, sizeof(float_str), "%E", (float) p / q);
 385                                 g_snprintf(command, sizeof(command),
 386                                            (*model->scpi_dialect)[SCPI_CMD_SET_VERTICAL_DIV],
 387                                            j, float_str);
 388
 389                                 if (sr_scpi_send(sdi->conn, command) != SR_OK ||
 390                                     sr_scpi_get_opc(sdi->conn) != SR_OK)
 391                                         return SR_ERR;
 392
 393                                 break;
 394                         }
 395
 396                         ret = SR_OK;
 397                         break;
 398                 }
 399                 break;
 400         case SR_CONF_TIMEBASE:
 401                 g_variant_get(data, "(tt)", &p, &q);
 402
 403                 for (i = 0; i < model->num_timebases; i++) {
 404                         if (p != (*model->timebases)[i][0] ||
 405                             q != (*model->timebases)[i][1])
 406                                 continue;
 407                         state->timebase = i;
 408                         g_ascii_formatd(float_str, sizeof(float_str), "%E", (float) p / q);
 409                         g_snprintf(command, sizeof(command),
 410                                    (*model->scpi_dialect)[SCPI_CMD_SET_TIMEBASE],
 411                                    float_str);
 412
 413                         ret = sr_scpi_send(sdi->conn, command);
 414                         update_sample_rate = TRUE;
 415                         break;
 416                 }
 417                 break;
 418         case SR_CONF_HORIZ_TRIGGERPOS:
 419                 tmp_d = g_variant_get_double(data);
 420
 421                 if (tmp_d < 0.0 || tmp_d > 1.0)
 422                         return SR_ERR;
 423
 424                 state->horiz_triggerpos = tmp_d;
 425                 tmp_d = -(tmp_d - 0.5) *
 426                         ((double) (*model->timebases)[state->timebase][0] /
 427                         (*model->timebases)[state->timebase][1])
 428                          * model->num_xdivs;
 429
 430                 g_ascii_formatd(float_str, sizeof(float_str), "%E", tmp_d);
 431                 g_snprintf(command, sizeof(command),
 432                            (*model->scpi_dialect)[SCPI_CMD_SET_HORIZ_TRIGGERPOS],
 433                            float_str);
 434
 435                 ret = sr_scpi_send(sdi->conn, command);
 436                 break;
 437         case SR_CONF_TRIGGER_SLOPE:
 438                 tmp = g_variant_get_string(data, NULL);
 439
 440                 if (!tmp || !(tmp[0] == 'f' || tmp[0] == 'r'))
 441                         return SR_ERR_ARG;
 442
 443                 state->trigger_slope = (tmp[0] == 'r') ? 0 : 1;
 444
 445                 g_snprintf(command, sizeof(command),
 446                            (*model->scpi_dialect)[SCPI_CMD_SET_TRIGGER_SLOPE],
 447                            (state->trigger_slope == 0) ? "POS" : "NEG");
 448
 449                 ret = sr_scpi_send(sdi->conn, command);
 450                 break;
 451         case SR_CONF_COUPLING:
 452                 if (cg_type == CG_NONE) {
 453                         sr_err("No channel group specified.");
 454                         return SR_ERR_CHANNEL_GROUP;
 455                 }
 456
 457                 tmp = g_variant_get_string(data, NULL);
 458
 459                 for (i = 0; (*model->coupling_options)[i]; i++) {
 460                         if (strcmp(tmp, (*model->coupling_options)[i]) != 0)
 461                                 continue;
 462                         for (j = 1; j <= model->analog_channels; ++j) {
 463                                 if (cg != devc->analog_groups[j - 1])
 464                                         continue;
 465                                 state->analog_channels[j-1].coupling = i;
 466
 467                                 g_snprintf(command, sizeof(command),
 468                                            (*model->scpi_dialect)[SCPI_CMD_SET_COUPLING],
 469                                            j, tmp);
 470
 471                                 if (sr_scpi_send(sdi->conn, command) != SR_OK ||
 472                                     sr_scpi_get_opc(sdi->conn) != SR_OK)
 473                                         return SR_ERR;
 474                                 break;
 475                         }
 476
 477                         ret = SR_OK;
 478                         break;
 479                 }
 480                 break;
 481         default:
 482                 ret = SR_ERR_NA;
 483                 break;
 484         }
 485
 486         if (ret == SR_OK)
 487                 ret = sr_scpi_get_opc(sdi->conn);
 488
 489         if (ret == SR_OK && update_sample_rate)
 490                 ret = hmo_update_sample_rate(sdi);
 491
 492         return ret;
 493 }
 494
 495 static int config_list(int key, GVariant **data, const struct sr_dev_inst *sdi,
 496                        const struct sr_channel_group *cg)
 497 {
 498         int cg_type;
 499         struct dev_context *devc;
 500         struct scope_config *model;
 501
 502         if (!sdi || !(devc = sdi->priv))
 503                 return SR_ERR_ARG;
 504
 505         if ((cg_type = check_channel_group(devc, cg)) == CG_INVALID)
 506                 return SR_ERR;
 507
 508         model = devc->model_config;
 509
 510         switch (key) {
 511         case SR_CONF_SCAN_OPTIONS:
 512                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
 513                                 scanopts, ARRAY_SIZE(scanopts), sizeof(int32_t));
 514                 break;
 515         case SR_CONF_DEVICE_OPTIONS:
 516                 if (cg_type == CG_NONE) {
 517                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
 518                                 model->hw_caps, model->num_hwcaps,
 519                                 sizeof(int32_t));
 520                 } else if (cg_type == CG_ANALOG) {
 521                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
 522                                 model->analog_hwcaps, model->num_analog_hwcaps,
 523                                 sizeof(int32_t));
 524                 } else {
 525                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
 526                                 NULL, 0, sizeof(int32_t));
 527                 }
 528                 break;
 529         case SR_CONF_COUPLING:
 530                 if (cg_type == CG_NONE)
 531                         return SR_ERR_CHANNEL_GROUP;
 532                 *data = g_variant_new_strv(*model->coupling_options,
 533                            g_strv_length((char **)*model->coupling_options));
 534                 break;
 535         case SR_CONF_TRIGGER_SOURCE:
 536                 *data = g_variant_new_strv(*model->trigger_sources,
 537                            g_strv_length((char **)*model->trigger_sources));
 538                 break;
 539         case SR_CONF_TRIGGER_SLOPE:
 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                 *data = build_tuples(model->timebases, model->num_timebases);
 545                 break;
 546         case SR_CONF_VDIV:
 547                 if (cg_type == CG_NONE)
 548                         return SR_ERR_CHANNEL_GROUP;
 549                 *data = build_tuples(model->vdivs, model->num_vdivs);
 550                 break;
 551         default:
 552                 return SR_ERR_NA;
 553         }
 554
 555         return SR_OK;
 556 }
 557
 558 SR_PRIV int hmo_request_data(const struct sr_dev_inst *sdi)
 559 {
 560         char command[MAX_COMMAND_SIZE];
 561         struct sr_channel *ch;
 562         struct dev_context *devc;
 563         struct scope_config *model;
 564
 565         devc = sdi->priv;
 566         model = devc->model_config;
 567
 568         ch = devc->current_channel->data;
 569
 570         switch (ch->type) {
 571         case SR_CHANNEL_ANALOG:
 572                 g_snprintf(command, sizeof(command),
 573                            (*model->scpi_dialect)[SCPI_CMD_GET_ANALOG_DATA],
 574                            ch->index + 1);
 575                 break;
 576         case SR_CHANNEL_LOGIC:
 577                 g_snprintf(command, sizeof(command),
 578                            (*model->scpi_dialect)[SCPI_CMD_GET_DIG_DATA],
 579                            ch->index < 8 ? 1 : 2);
 580                 break;
 581         default:
 582                 sr_err("Invalid channel type.");
 583                 break;
 584         }
 585
 586         return sr_scpi_send(sdi->conn, command);
 587 }
 588
 589 static int hmo_check_channels(GSList *channels)
 590 {
 591         GSList *l;
 592         struct sr_channel *ch;
 593         gboolean enabled_pod1, enabled_pod2, enabled_chan3, enabled_chan4;
 594
 595         enabled_pod1 = enabled_pod2 = enabled_chan3 = enabled_chan4 = FALSE;
 596
 597         for (l = channels; l; l = l->next) {
 598                 ch = l->data;
 599                 switch (ch->type) {
 600                 case SR_CHANNEL_ANALOG:
 601                         if (ch->index == 2)
 602                                 enabled_chan3 = TRUE;
 603                         else if (ch->index == 3)
 604                                 enabled_chan4 = TRUE;
 605                         break;
 606                 case SR_CHANNEL_LOGIC:
 607                         if (ch->index < 8)
 608                                 enabled_pod1 = TRUE;
 609                         else
 610                                 enabled_pod2 = TRUE;
 611                         break;
 612                 default:
 613                         return SR_ERR;
 614                 }
 615         }
 616
 617         if ((enabled_pod1 && enabled_chan3) ||
 618             (enabled_pod2 && enabled_chan4))
 619                 return SR_ERR;
 620
 621         return SR_OK;
 622 }
 623
 624 static int hmo_setup_channels(const struct sr_dev_inst *sdi)
 625 {
 626         GSList *l;
 627         unsigned int i;
 628         gboolean *pod_enabled, setup_changed;
 629         char command[MAX_COMMAND_SIZE];
 630         struct scope_state *state;
 631         struct scope_config *model;
 632         struct sr_channel *ch;
 633         struct dev_context *devc;
 634         struct sr_scpi_dev_inst *scpi;
 635
 636         devc = sdi->priv;
 637         scpi = sdi->conn;
 638         state = devc->model_state;
 639         model = devc->model_config;
 640         setup_changed = FALSE;
 641
 642         pod_enabled = g_try_malloc0(sizeof(gboolean) * model->digital_pods);
 643
 644         for (l = sdi->channels; l; l = l->next) {
 645                 ch = l->data;
 646                 switch (ch->type) {
 647                 case SR_CHANNEL_ANALOG:
 648                         if (ch->enabled == state->analog_channels[ch->index].state)
 649                                 break;
 650                         g_snprintf(command, sizeof(command),
 651                                    (*model->scpi_dialect)[SCPI_CMD_SET_ANALOG_CHAN_STATE],
 652                                    ch->index + 1, ch->enabled);
 653
 654                         if (sr_scpi_send(scpi, command) != SR_OK)
 655                                 return SR_ERR;
 656                         state->analog_channels[ch->index].state = ch->enabled;
 657                         setup_changed = TRUE;
 658                         break;
 659                 case SR_CHANNEL_LOGIC:
 660                         /*
 661                          * A digital POD needs to be enabled for every group of
 662                          * 8 channels.
 663                          */
 664                         if (ch->enabled)
 665                                 pod_enabled[ch->index < 8 ? 0 : 1] = TRUE;
 666
 667                         if (ch->enabled == state->digital_channels[ch->index])
 668                                 break;
 669                         g_snprintf(command, sizeof(command),
 670                                    (*model->scpi_dialect)[SCPI_CMD_SET_DIG_CHAN_STATE],
 671                                    ch->index, ch->enabled);
 672
 673                         if (sr_scpi_send(scpi, command) != SR_OK)
 674                                 return SR_ERR;
 675
 676                         state->digital_channels[ch->index] = ch->enabled;
 677                         setup_changed = TRUE;
 678                         break;
 679                 default:
 680                         return SR_ERR;
 681                 }
 682         }
 683
 684         for (i = 1; i <= model->digital_pods; ++i) {
 685                 if (state->digital_pods[i - 1] == pod_enabled[i - 1])
 686                         continue;
 687                 g_snprintf(command, sizeof(command),
 688                            (*model->scpi_dialect)[SCPI_CMD_SET_DIG_POD_STATE],
 689                            i, pod_enabled[i - 1]);
 690                 if (sr_scpi_send(scpi, command) != SR_OK)
 691                         return SR_ERR;
 692                 state->digital_pods[i - 1] = pod_enabled[i - 1];
 693                 setup_changed = TRUE;
 694         }
 695
 696         g_free(pod_enabled);
 697
 698         if (setup_changed && hmo_update_sample_rate(sdi) != SR_OK)
 699                 return SR_ERR;
 700
 701         return SR_OK;
 702 }
 703
 704 static int dev_acquisition_start(const struct sr_dev_inst *sdi, void *cb_data)
 705 {
 706         GSList *l;
 707         gboolean digital_added;
 708         struct sr_channel *ch;
 709         struct dev_context *devc;
 710         struct sr_scpi_dev_inst *scpi;
 711
 712         if (sdi->status != SR_ST_ACTIVE)
 713                 return SR_ERR_DEV_CLOSED;
 714
 715         scpi = sdi->conn;
 716         devc = sdi->priv;
 717         digital_added = FALSE;
 718
 719         g_slist_free(devc->enabled_channels);
 720         devc->enabled_channels = NULL;
 721
 722         for (l = sdi->channels; l; l = l->next) {
 723                 ch = l->data;
 724                 if (!ch->enabled)
 725                         continue;
 726                 /* Only add a single digital channel. */
 727                 if (ch->type != SR_CHANNEL_LOGIC || !digital_added) {
 728                         devc->enabled_channels = g_slist_append(
 729                                         devc->enabled_channels, ch);
 730                         if (ch->type == SR_CHANNEL_LOGIC)
 731                                 digital_added = TRUE;
 732                 }
 733         }
 734
 735         if (!devc->enabled_channels)
 736                 return SR_ERR;
 737
 738         if (hmo_check_channels(devc->enabled_channels) != SR_OK) {
 739                 sr_err("Invalid channel configuration specified!");
 740                 return SR_ERR_NA;
 741         }
 742
 743         if (hmo_setup_channels(sdi) != SR_OK) {
 744                 sr_err("Failed to setup channel configuration!");
 745                 return SR_ERR;
 746         }
 747
 748         sr_scpi_source_add(sdi->session, scpi, G_IO_IN, 50,
 749                         hmo_receive_data, (void *)sdi);
 750
 751         /* Send header packet to the session bus. */
 752         std_session_send_df_header(cb_data, LOG_PREFIX);
 753
 754         devc->current_channel = devc->enabled_channels;
 755
 756         return hmo_request_data(sdi);
 757 }
 758
 759 static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
 760 {
 761         struct dev_context *devc;
 762         struct sr_scpi_dev_inst *scpi;
 763         struct sr_datafeed_packet packet;
 764
 765         (void)cb_data;
 766
 767         packet.type = SR_DF_END;
 768         packet.payload = NULL;
 769         sr_session_send(sdi, &packet);
 770
 771         if (sdi->status != SR_ST_ACTIVE)
 772                 return SR_ERR_DEV_CLOSED;
 773
 774         devc = sdi->priv;
 775
 776         devc->num_frames = 0;
 777         g_slist_free(devc->enabled_channels);
 778         devc->enabled_channels = NULL;
 779         scpi = sdi->conn;
 780         sr_scpi_source_remove(sdi->session, scpi);
 781
 782         return SR_OK;
 783 }
 784
 785 SR_PRIV struct sr_dev_driver hameg_hmo_driver_info = {
 786         .name = "hameg-hmo",
 787         .longname = "Hameg HMO",
 788         .api_version = 1,
 789         .init = init,
 790         .cleanup = cleanup,
 791         .scan = scan,
 792         .dev_list = dev_list,
 793         .dev_clear = dev_clear,
 794         .config_get = config_get,
 795         .config_set = config_set,
 796         .config_list = config_list,
 797         .dev_open = dev_open,
 798         .dev_close = dev_close,
 799         .dev_acquisition_start = dev_acquisition_start,
 800         .dev_acquisition_stop = dev_acquisition_stop,
 801         .priv = NULL,
 802 };