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(di, sr_ctx, 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 void clear_helper(void *priv)
 121 {
 122         struct dev_context *devc;
 123
 124         devc = priv;
 125
 126         hmo_scope_state_free(devc->model_state);
 127
 128         g_free(devc->analog_groups);
 129         g_free(devc->digital_groups);
 130
 131         g_free(devc);
 132 }
 133
 134 static int dev_clear(const struct sr_dev_driver *di)
 135 {
 136         return std_dev_clear(di, clear_helper);
 137 }
 138
 139 static int dev_open(struct sr_dev_inst *sdi)
 140 {
 141         if (sdi->status != SR_ST_ACTIVE && sr_scpi_open(sdi->conn) != SR_OK)
 142                 return SR_ERR;
 143
 144         if (hmo_scope_state_get(sdi) != SR_OK)
 145                 return SR_ERR;
 146
 147         sdi->status = SR_ST_ACTIVE;
 148
 149         return SR_OK;
 150 }
 151
 152 static int dev_close(struct sr_dev_inst *sdi)
 153 {
 154         if (sdi->status == SR_ST_INACTIVE)
 155                 return SR_OK;
 156
 157         sr_scpi_close(sdi->conn);
 158
 159         sdi->status = SR_ST_INACTIVE;
 160
 161         return SR_OK;
 162 }
 163
 164 static int check_channel_group(struct dev_context *devc,
 165                              const struct sr_channel_group *cg)
 166 {
 167         unsigned int i;
 168         const struct scope_config *model;
 169
 170         model = devc->model_config;
 171
 172         if (!cg)
 173                 return CG_NONE;
 174
 175         for (i = 0; i < model->analog_channels; i++)
 176                 if (cg == devc->analog_groups[i])
 177                         return CG_ANALOG;
 178
 179         for (i = 0; i < model->digital_pods; i++)
 180                 if (cg == devc->digital_groups[i])
 181                         return CG_DIGITAL;
 182
 183         sr_err("Invalid channel group specified.");
 184
 185         return CG_INVALID;
 186 }
 187
 188 static int config_get(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
 189                       const struct sr_channel_group *cg)
 190 {
 191         int ret, cg_type;
 192         unsigned int i;
 193         struct dev_context *devc;
 194         const struct scope_config *model;
 195         struct scope_state *state;
 196
 197         if (!sdi || !(devc = sdi->priv))
 198                 return SR_ERR_ARG;
 199
 200         if ((cg_type = check_channel_group(devc, cg)) == CG_INVALID)
 201                 return SR_ERR;
 202
 203         ret = SR_ERR_NA;
 204         model = devc->model_config;
 205         state = devc->model_state;
 206
 207         switch (key) {
 208         case SR_CONF_NUM_HDIV:
 209                 *data = g_variant_new_int32(model->num_xdivs);
 210                 ret = SR_OK;
 211                 break;
 212         case SR_CONF_TIMEBASE:
 213                 *data = g_variant_new("(tt)", (*model->timebases)[state->timebase][0],
 214                                       (*model->timebases)[state->timebase][1]);
 215                 ret = SR_OK;
 216                 break;
 217         case SR_CONF_NUM_VDIV:
 218                 if (cg_type == CG_NONE) {
 219                         sr_err("No channel group specified.");
 220                         return SR_ERR_CHANNEL_GROUP;
 221                 } else if (cg_type == CG_ANALOG) {
 222                         for (i = 0; i < model->analog_channels; i++) {
 223                                 if (cg != devc->analog_groups[i])
 224                                         continue;
 225                                 *data = g_variant_new_int32(model->num_ydivs);
 226                                 ret = SR_OK;
 227                                 break;
 228                         }
 229
 230                 } else {
 231                         ret = SR_ERR_NA;
 232                 }
 233                 break;
 234         case SR_CONF_VDIV:
 235                 if (cg_type == CG_NONE) {
 236                         sr_err("No channel group specified.");
 237                         return SR_ERR_CHANNEL_GROUP;
 238                 } else if (cg_type == CG_ANALOG) {
 239                         for (i = 0; i < model->analog_channels; i++) {
 240                                 if (cg != devc->analog_groups[i])
 241                                         continue;
 242                                 *data = g_variant_new("(tt)",
 243                                                       (*model->vdivs)[state->analog_channels[i].vdiv][0],
 244                                                       (*model->vdivs)[state->analog_channels[i].vdiv][1]);
 245                                 ret = SR_OK;
 246                                 break;
 247                         }
 248
 249                 } else {
 250                         ret = SR_ERR_NA;
 251                 }
 252                 break;
 253         case SR_CONF_TRIGGER_SOURCE:
 254                 *data = g_variant_new_string((*model->trigger_sources)[state->trigger_source]);
 255                 ret = SR_OK;
 256                 break;
 257         case SR_CONF_TRIGGER_SLOPE:
 258                 *data = g_variant_new_string((*model->trigger_slopes)[state->trigger_slope]);
 259                 ret = SR_OK;
 260                 break;
 261         case SR_CONF_HORIZ_TRIGGERPOS:
 262                 *data = g_variant_new_double(state->horiz_triggerpos);
 263                 ret = SR_OK;
 264                 break;
 265         case SR_CONF_COUPLING:
 266                 if (cg_type == CG_NONE) {
 267                         sr_err("No channel group specified.");
 268                         return SR_ERR_CHANNEL_GROUP;
 269                 } else if (cg_type == CG_ANALOG) {
 270                         for (i = 0; i < model->analog_channels; i++) {
 271                                 if (cg != devc->analog_groups[i])
 272                                         continue;
 273                                 *data = g_variant_new_string((*model->coupling_options)[state->analog_channels[i].coupling]);
 274                                 ret = SR_OK;
 275                                 break;
 276                         }
 277
 278                 } else {
 279                         ret = SR_ERR_NA;
 280                 }
 281                 break;
 282         case SR_CONF_SAMPLERATE:
 283                 *data = g_variant_new_uint64(state->sample_rate);
 284                 ret = SR_OK;
 285                 break;
 286         default:
 287                 ret = SR_ERR_NA;
 288         }
 289
 290         return ret;
 291 }
 292
 293 static GVariant *build_tuples(const uint64_t (*array)[][2], unsigned int n)
 294 {
 295         unsigned int i;
 296         GVariant *rational[2];
 297         GVariantBuilder gvb;
 298
 299         g_variant_builder_init(&gvb, G_VARIANT_TYPE_ARRAY);
 300
 301         for (i = 0; i < n; i++) {
 302                 rational[0] = g_variant_new_uint64((*array)[i][0]);
 303                 rational[1] = g_variant_new_uint64((*array)[i][1]);
 304
 305                 /* FIXME: Valgrind reports a memory leak here. */
 306                 g_variant_builder_add_value(&gvb, g_variant_new_tuple(rational, 2));
 307         }
 308
 309         return g_variant_builder_end(&gvb);
 310 }
 311
 312 static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sdi,
 313                       const struct sr_channel_group *cg)
 314 {
 315         int ret, cg_type;
 316         unsigned int i, j;
 317         char command[MAX_COMMAND_SIZE], float_str[30];
 318         struct dev_context *devc;
 319         const struct scope_config *model;
 320         struct scope_state *state;
 321         const char *tmp;
 322         uint64_t p, q;
 323         double tmp_d;
 324         gboolean update_sample_rate;
 325
 326         if (!sdi || !(devc = sdi->priv))
 327                 return SR_ERR_ARG;
 328
 329         if ((cg_type = check_channel_group(devc, cg)) == CG_INVALID)
 330                 return SR_ERR;
 331
 332         model = devc->model_config;
 333         state = devc->model_state;
 334         update_sample_rate = FALSE;
 335
 336         ret = SR_ERR_NA;
 337
 338         switch (key) {
 339         case SR_CONF_LIMIT_FRAMES:
 340                 devc->frame_limit = g_variant_get_uint64(data);
 341                 ret = SR_OK;
 342                 break;
 343         case SR_CONF_TRIGGER_SOURCE:
 344                 tmp = g_variant_get_string(data, NULL);
 345                 for (i = 0; (*model->trigger_sources)[i]; i++) {
 346                         if (g_strcmp0(tmp, (*model->trigger_sources)[i]) != 0)
 347                                 continue;
 348                         state->trigger_source = i;
 349                         g_snprintf(command, sizeof(command),
 350                                    (*model->scpi_dialect)[SCPI_CMD_SET_TRIGGER_SOURCE],
 351                                    (*model->trigger_sources)[i]);
 352
 353                         ret = sr_scpi_send(sdi->conn, command);
 354                         break;
 355                 }
 356                 break;
 357         case SR_CONF_VDIV:
 358                 if (cg_type == CG_NONE) {
 359                         sr_err("No channel group specified.");
 360                         return SR_ERR_CHANNEL_GROUP;
 361                 }
 362
 363                 g_variant_get(data, "(tt)", &p, &q);
 364
 365                 for (i = 0; i < model->num_vdivs; i++) {
 366                         if (p != (*model->vdivs)[i][0] ||
 367                             q != (*model->vdivs)[i][1])
 368                                 continue;
 369                         for (j = 1; j <= model->analog_channels; j++) {
 370                                 if (cg != devc->analog_groups[j - 1])
 371                                         continue;
 372                                 state->analog_channels[j - 1].vdiv = i;
 373                                 g_ascii_formatd(float_str, sizeof(float_str), "%E", (float) p / q);
 374                                 g_snprintf(command, sizeof(command),
 375                                            (*model->scpi_dialect)[SCPI_CMD_SET_VERTICAL_DIV],
 376                                            j, float_str);
 377
 378                                 if (sr_scpi_send(sdi->conn, command) != SR_OK ||
 379                                     sr_scpi_get_opc(sdi->conn) != SR_OK)
 380                                         return SR_ERR;
 381
 382                                 break;
 383                         }
 384
 385                         ret = SR_OK;
 386                         break;
 387                 }
 388                 break;
 389         case SR_CONF_TIMEBASE:
 390                 g_variant_get(data, "(tt)", &p, &q);
 391
 392                 for (i = 0; i < model->num_timebases; i++) {
 393                         if (p != (*model->timebases)[i][0] ||
 394                             q != (*model->timebases)[i][1])
 395                                 continue;
 396                         state->timebase = i;
 397                         g_ascii_formatd(float_str, sizeof(float_str), "%E", (float) p / q);
 398                         g_snprintf(command, sizeof(command),
 399                                    (*model->scpi_dialect)[SCPI_CMD_SET_TIMEBASE],
 400                                    float_str);
 401
 402                         ret = sr_scpi_send(sdi->conn, command);
 403                         update_sample_rate = TRUE;
 404                         break;
 405                 }
 406                 break;
 407         case SR_CONF_HORIZ_TRIGGERPOS:
 408                 tmp_d = g_variant_get_double(data);
 409
 410                 if (tmp_d < 0.0 || tmp_d > 1.0)
 411                         return SR_ERR;
 412
 413                 state->horiz_triggerpos = tmp_d;
 414                 tmp_d = -(tmp_d - 0.5) *
 415                         ((double) (*model->timebases)[state->timebase][0] /
 416                         (*model->timebases)[state->timebase][1])
 417                          * model->num_xdivs;
 418
 419                 g_ascii_formatd(float_str, sizeof(float_str), "%E", tmp_d);
 420                 g_snprintf(command, sizeof(command),
 421                            (*model->scpi_dialect)[SCPI_CMD_SET_HORIZ_TRIGGERPOS],
 422                            float_str);
 423
 424                 ret = sr_scpi_send(sdi->conn, command);
 425                 break;
 426         case SR_CONF_TRIGGER_SLOPE:
 427                 tmp = g_variant_get_string(data, NULL);
 428                 for (i = 0; (*model->trigger_slopes)[i]; i++) {
 429                         if (g_strcmp0(tmp, (*model->trigger_slopes)[i]) != 0)
 430                                 continue;
 431                         state->trigger_slope = i;
 432                         g_snprintf(command, sizeof(command),
 433                                    (*model->scpi_dialect)[SCPI_CMD_SET_TRIGGER_SLOPE],
 434                                    (*model->trigger_slopes)[i]);
 435
 436                         ret = sr_scpi_send(sdi->conn, command);
 437                         break;
 438                 }
 439                 break;
 440         case SR_CONF_COUPLING:
 441                 if (cg_type == CG_NONE) {
 442                         sr_err("No channel group specified.");
 443                         return SR_ERR_CHANNEL_GROUP;
 444                 }
 445
 446                 tmp = g_variant_get_string(data, NULL);
 447
 448                 for (i = 0; (*model->coupling_options)[i]; i++) {
 449                         if (strcmp(tmp, (*model->coupling_options)[i]) != 0)
 450                                 continue;
 451                         for (j = 1; j <= model->analog_channels; j++) {
 452                                 if (cg != devc->analog_groups[j - 1])
 453                                         continue;
 454                                 state->analog_channels[j-1].coupling = i;
 455
 456                                 g_snprintf(command, sizeof(command),
 457                                            (*model->scpi_dialect)[SCPI_CMD_SET_COUPLING],
 458                                            j, tmp);
 459
 460                                 if (sr_scpi_send(sdi->conn, command) != SR_OK ||
 461                                     sr_scpi_get_opc(sdi->conn) != SR_OK)
 462                                         return SR_ERR;
 463                                 break;
 464                         }
 465
 466                         ret = SR_OK;
 467                         break;
 468                 }
 469                 break;
 470         default:
 471                 ret = SR_ERR_NA;
 472                 break;
 473         }
 474
 475         if (ret == SR_OK)
 476                 ret = sr_scpi_get_opc(sdi->conn);
 477
 478         if (ret == SR_OK && update_sample_rate)
 479                 ret = hmo_update_sample_rate(sdi);
 480
 481         return ret;
 482 }
 483
 484 static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
 485                        const struct sr_channel_group *cg)
 486 {
 487         int cg_type = CG_NONE;
 488         struct dev_context *devc = NULL;
 489         const struct scope_config *model = NULL;
 490
 491         if (sdi && (devc = sdi->priv)) {
 492                 if ((cg_type = check_channel_group(devc, cg)) == CG_INVALID)
 493                         return SR_ERR;
 494
 495                 model = devc->model_config;
 496         }
 497
 498         switch (key) {
 499         case SR_CONF_SCAN_OPTIONS:
 500                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 501                                 scanopts, ARRAY_SIZE(scanopts), sizeof(uint32_t));
 502                 break;
 503         case SR_CONF_DEVICE_OPTIONS:
 504                 if (cg_type == CG_NONE) {
 505                         if (model)
 506                                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 507                                         model->devopts, model->num_devopts, sizeof(uint32_t));
 508                         else
 509                                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 510                                         drvopts, ARRAY_SIZE(drvopts), sizeof(uint32_t));
 511                 } else if (cg_type == CG_ANALOG) {
 512                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 513                                 model->analog_devopts, model->num_analog_devopts,
 514                                 sizeof(uint32_t));
 515                 } else {
 516                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 517                                 NULL, 0, sizeof(uint32_t));
 518                 }
 519                 break;
 520         case SR_CONF_COUPLING:
 521                 if (cg_type == CG_NONE)
 522                         return SR_ERR_CHANNEL_GROUP;
 523                 *data = g_variant_new_strv(*model->coupling_options,
 524                            g_strv_length((char **)*model->coupling_options));
 525                 break;
 526         case SR_CONF_TRIGGER_SOURCE:
 527                 if (!model)
 528                         return SR_ERR_ARG;
 529                 *data = g_variant_new_strv(*model->trigger_sources,
 530                            g_strv_length((char **)*model->trigger_sources));
 531                 break;
 532         case SR_CONF_TRIGGER_SLOPE:
 533                 if (!model)
 534                         return SR_ERR_ARG;
 535                 *data = g_variant_new_strv(*model->trigger_slopes,
 536                            g_strv_length((char **)*model->trigger_slopes));
 537                 break;
 538         case SR_CONF_TIMEBASE:
 539                 if (!model)
 540                         return SR_ERR_ARG;
 541                 *data = build_tuples(model->timebases, model->num_timebases);
 542                 break;
 543         case SR_CONF_VDIV:
 544                 if (cg_type == CG_NONE)
 545                         return SR_ERR_CHANNEL_GROUP;
 546                 *data = build_tuples(model->vdivs, model->num_vdivs);
 547                 break;
 548         default:
 549                 return SR_ERR_NA;
 550         }
 551
 552         return SR_OK;
 553 }
 554
 555 SR_PRIV int hmo_request_data(const struct sr_dev_inst *sdi)
 556 {
 557         char command[MAX_COMMAND_SIZE];
 558         struct sr_channel *ch;
 559         struct dev_context *devc;
 560         const struct scope_config *model;
 561
 562         devc = sdi->priv;
 563         model = devc->model_config;
 564
 565         ch = devc->current_channel->data;
 566
 567         switch (ch->type) {
 568         case SR_CHANNEL_ANALOG:
 569                 g_snprintf(command, sizeof(command),
 570                            (*model->scpi_dialect)[SCPI_CMD_GET_ANALOG_DATA],
 571                            ch->index + 1);
 572                 break;
 573         case SR_CHANNEL_LOGIC:
 574                 g_snprintf(command, sizeof(command),
 575                            (*model->scpi_dialect)[SCPI_CMD_GET_DIG_DATA],
 576                            ch->index < 8 ? 1 : 2);
 577                 break;
 578         default:
 579                 sr_err("Invalid channel type.");
 580                 break;
 581         }
 582
 583         return sr_scpi_send(sdi->conn, command);
 584 }
 585
 586 static int hmo_check_channels(GSList *channels)
 587 {
 588         GSList *l;
 589         struct sr_channel *ch;
 590         gboolean enabled_pod1, enabled_pod2, enabled_chan3, enabled_chan4;
 591
 592         enabled_pod1 = enabled_pod2 = enabled_chan3 = enabled_chan4 = FALSE;
 593
 594         for (l = channels; l; l = l->next) {
 595                 ch = l->data;
 596                 switch (ch->type) {
 597                 case SR_CHANNEL_ANALOG:
 598                         if (ch->index == 2)
 599                                 enabled_chan3 = TRUE;
 600                         else if (ch->index == 3)
 601                                 enabled_chan4 = TRUE;
 602                         break;
 603                 case SR_CHANNEL_LOGIC:
 604                         if (ch->index < 8)
 605                                 enabled_pod1 = TRUE;
 606                         else
 607                                 enabled_pod2 = TRUE;
 608                         break;
 609                 default:
 610                         return SR_ERR;
 611                 }
 612         }
 613
 614         if ((enabled_pod1 && enabled_chan3) ||
 615             (enabled_pod2 && enabled_chan4))
 616                 return SR_ERR;
 617
 618         return SR_OK;
 619 }
 620
 621 static int hmo_setup_channels(const struct sr_dev_inst *sdi)
 622 {
 623         GSList *l;
 624         unsigned int i;
 625         gboolean *pod_enabled, setup_changed;
 626         char command[MAX_COMMAND_SIZE];
 627         struct scope_state *state;
 628         const struct scope_config *model;
 629         struct sr_channel *ch;
 630         struct dev_context *devc;
 631         struct sr_scpi_dev_inst *scpi;
 632
 633         devc = sdi->priv;
 634         scpi = sdi->conn;
 635         state = devc->model_state;
 636         model = devc->model_config;
 637         setup_changed = FALSE;
 638
 639         pod_enabled = g_try_malloc0(sizeof(gboolean) * model->digital_pods);
 640
 641         for (l = sdi->channels; l; l = l->next) {
 642                 ch = l->data;
 643                 switch (ch->type) {
 644                 case SR_CHANNEL_ANALOG:
 645                         if (ch->enabled == state->analog_channels[ch->index].state)
 646                                 break;
 647                         g_snprintf(command, sizeof(command),
 648                                    (*model->scpi_dialect)[SCPI_CMD_SET_ANALOG_CHAN_STATE],
 649                                    ch->index + 1, ch->enabled);
 650
 651                         if (sr_scpi_send(scpi, command) != SR_OK)
 652                                 return SR_ERR;
 653                         state->analog_channels[ch->index].state = ch->enabled;
 654                         setup_changed = TRUE;
 655                         break;
 656                 case SR_CHANNEL_LOGIC:
 657                         /*
 658                          * A digital POD needs to be enabled for every group of
 659                          * 8 channels.
 660                          */
 661                         if (ch->enabled)
 662                                 pod_enabled[ch->index < 8 ? 0 : 1] = TRUE;
 663
 664                         if (ch->enabled == state->digital_channels[ch->index])
 665                                 break;
 666                         g_snprintf(command, sizeof(command),
 667                                    (*model->scpi_dialect)[SCPI_CMD_SET_DIG_CHAN_STATE],
 668                                    ch->index, ch->enabled);
 669
 670                         if (sr_scpi_send(scpi, command) != SR_OK)
 671                                 return SR_ERR;
 672
 673                         state->digital_channels[ch->index] = ch->enabled;
 674                         setup_changed = TRUE;
 675                         break;
 676                 default:
 677                         return SR_ERR;
 678                 }
 679         }
 680
 681         for (i = 1; i <= model->digital_pods; i++) {
 682                 if (state->digital_pods[i - 1] == pod_enabled[i - 1])
 683                         continue;
 684                 g_snprintf(command, sizeof(command),
 685                            (*model->scpi_dialect)[SCPI_CMD_SET_DIG_POD_STATE],
 686                            i, pod_enabled[i - 1]);
 687                 if (sr_scpi_send(scpi, command) != SR_OK)
 688                         return SR_ERR;
 689                 state->digital_pods[i - 1] = pod_enabled[i - 1];
 690                 setup_changed = TRUE;
 691         }
 692
 693         g_free(pod_enabled);
 694
 695         if (setup_changed && hmo_update_sample_rate(sdi) != SR_OK)
 696                 return SR_ERR;
 697
 698         return SR_OK;
 699 }
 700
 701 static int dev_acquisition_start(const struct sr_dev_inst *sdi)
 702 {
 703         GSList *l;
 704         gboolean digital_added;
 705         struct sr_channel *ch;
 706         struct dev_context *devc;
 707         struct sr_scpi_dev_inst *scpi;
 708
 709         if (sdi->status != SR_ST_ACTIVE)
 710                 return SR_ERR_DEV_CLOSED;
 711
 712         scpi = sdi->conn;
 713         devc = sdi->priv;
 714         digital_added = FALSE;
 715
 716         g_slist_free(devc->enabled_channels);
 717         devc->enabled_channels = NULL;
 718
 719         for (l = sdi->channels; l; l = l->next) {
 720                 ch = l->data;
 721                 if (!ch->enabled)
 722                         continue;
 723                 /* Only add a single digital channel. */
 724                 if (ch->type != SR_CHANNEL_LOGIC || !digital_added) {
 725                         devc->enabled_channels = g_slist_append(
 726                                         devc->enabled_channels, ch);
 727                         if (ch->type == SR_CHANNEL_LOGIC)
 728                                 digital_added = TRUE;
 729                 }
 730         }
 731
 732         if (!devc->enabled_channels)
 733                 return SR_ERR;
 734
 735         if (hmo_check_channels(devc->enabled_channels) != SR_OK) {
 736                 sr_err("Invalid channel configuration specified!");
 737                 return SR_ERR_NA;
 738         }
 739
 740         if (hmo_setup_channels(sdi) != SR_OK) {
 741                 sr_err("Failed to setup channel configuration!");
 742                 return SR_ERR;
 743         }
 744
 745         sr_scpi_source_add(sdi->session, scpi, G_IO_IN, 50,
 746                         hmo_receive_data, (void *)sdi);
 747
 748         std_session_send_df_header(sdi, LOG_PREFIX);
 749
 750         devc->current_channel = devc->enabled_channels;
 751
 752         return hmo_request_data(sdi);
 753 }
 754
 755 static int dev_acquisition_stop(struct sr_dev_inst *sdi)
 756 {
 757         struct dev_context *devc;
 758         struct sr_scpi_dev_inst *scpi;
 759
 760         std_session_send_df_end(sdi, LOG_PREFIX);
 761
 762         if (sdi->status != SR_ST_ACTIVE)
 763                 return SR_ERR_DEV_CLOSED;
 764
 765         devc = sdi->priv;
 766
 767         devc->num_frames = 0;
 768         g_slist_free(devc->enabled_channels);
 769         devc->enabled_channels = NULL;
 770         scpi = sdi->conn;
 771         sr_scpi_source_remove(sdi->session, scpi);
 772
 773         return SR_OK;
 774 }
 775
 776 SR_PRIV struct sr_dev_driver hameg_hmo_driver_info = {
 777         .name = "hameg-hmo",
 778         .longname = "Hameg HMO",
 779         .api_version = 1,
 780         .init = init,
 781         .cleanup = std_cleanup,
 782         .scan = scan,
 783         .dev_list = std_dev_list,
 784         .dev_clear = dev_clear,
 785         .config_get = config_get,
 786         .config_set = config_set,
 787         .config_list = config_list,
 788         .dev_open = dev_open,
 789         .dev_close = dev_close,
 790         .dev_acquisition_start = dev_acquisition_start,
 791         .dev_acquisition_stop = dev_acquisition_stop,
 792         .context = NULL,
 793 };