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 static 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 scanopts[] = {
  35         SR_CONF_CONN,
  36         SR_CONF_SERIALCOMM,
  37 };
  38
  39 static const uint32_t drvopts[] = {
  40         SR_CONF_OSCILLOSCOPE,
  41 };
  42
  43 enum {
  44         CG_INVALID = -1,
  45         CG_NONE,
  46         CG_ANALOG,
  47         CG_DIGITAL,
  48 };
  49
  50 static struct sr_dev_inst *probe_device(struct sr_scpi_dev_inst *scpi)
  51 {
  52         struct sr_dev_inst *sdi;
  53         struct dev_context *devc;
  54         struct sr_scpi_hw_info *hw_info;
  55
  56         sdi = NULL;
  57         devc = NULL;
  58         hw_info = NULL;
  59
  60         if (sr_scpi_get_hw_id(scpi, &hw_info) != SR_OK) {
  61                 sr_info("Couldn't get IDN response.");
  62                 goto fail;
  63         }
  64
  65         if (std_str_idx_s(hw_info->manufacturer, ARRAY_AND_SIZE(manufacturers)) < 0)
  66                 goto fail;
  67
  68         sdi = g_malloc0(sizeof(struct sr_dev_inst));
  69         sdi->vendor = g_strdup(hw_info->manufacturer);
  70         sdi->model = g_strdup(hw_info->model);
  71         sdi->version = g_strdup(hw_info->firmware_version);
  72         sdi->serial_num = g_strdup(hw_info->serial_number);
  73         sdi->driver = &hameg_hmo_driver_info;
  74         sdi->inst_type = SR_INST_SCPI;
  75         sdi->conn = scpi;
  76
  77         sr_scpi_hw_info_free(hw_info);
  78         hw_info = NULL;
  79
  80         devc = g_malloc0(sizeof(struct dev_context));
  81
  82         sdi->priv = devc;
  83
  84         if (hmo_init_device(sdi) != SR_OK)
  85                 goto fail;
  86
  87         return sdi;
  88
  89 fail:
  90         sr_scpi_hw_info_free(hw_info);
  91         sr_dev_inst_free(sdi);
  92         g_free(devc);
  93
  94         return NULL;
  95 }
  96
  97 static GSList *scan(struct sr_dev_driver *di, GSList *options)
  98 {
  99         return sr_scpi_scan(di->context, options, probe_device);
 100 }
 101
 102 static void clear_helper(struct dev_context *devc)
 103 {
 104         hmo_scope_state_free(devc->model_state);
 105         g_free(devc->analog_groups);
 106         g_free(devc->digital_groups);
 107 }
 108
 109 static int dev_clear(const struct sr_dev_driver *di)
 110 {
 111         return std_dev_clear_with_callback(di, (std_dev_clear_callback)clear_helper);
 112 }
 113
 114 static int dev_open(struct sr_dev_inst *sdi)
 115 {
 116         if (sr_scpi_open(sdi->conn) != SR_OK)
 117                 return SR_ERR;
 118
 119         if (hmo_scope_state_get(sdi) != SR_OK)
 120                 return SR_ERR;
 121
 122         return SR_OK;
 123 }
 124
 125 static int dev_close(struct sr_dev_inst *sdi)
 126 {
 127         return sr_scpi_close(sdi->conn);
 128 }
 129
 130 static int check_channel_group(struct dev_context *devc,
 131                              const struct sr_channel_group *cg)
 132 {
 133         const struct scope_config *model;
 134
 135         model = devc->model_config;
 136
 137         if (!cg)
 138                 return CG_NONE;
 139
 140         if (std_cg_idx(cg, devc->analog_groups, model->analog_channels) >= 0)
 141                 return CG_ANALOG;
 142
 143         if (std_cg_idx(cg, devc->digital_groups, model->digital_pods) >= 0)
 144                 return CG_DIGITAL;
 145
 146         sr_err("Invalid channel group specified.");
 147
 148         return CG_INVALID;
 149 }
 150
 151 static int config_get(uint32_t key, GVariant **data,
 152         const struct sr_dev_inst *sdi, const struct sr_channel_group *cg)
 153 {
 154         int cg_type, idx;
 155         struct dev_context *devc;
 156         const struct scope_config *model;
 157         struct scope_state *state;
 158
 159         if (!sdi)
 160                 return SR_ERR_ARG;
 161
 162         devc = sdi->priv;
 163
 164         if ((cg_type = check_channel_group(devc, cg)) == CG_INVALID)
 165                 return SR_ERR;
 166
 167         model = devc->model_config;
 168         state = devc->model_state;
 169
 170         switch (key) {
 171         case SR_CONF_NUM_HDIV:
 172                 *data = g_variant_new_int32(model->num_xdivs);
 173                 break;
 174         case SR_CONF_TIMEBASE:
 175                 *data = g_variant_new("(tt)", (*model->timebases)[state->timebase][0],
 176                                       (*model->timebases)[state->timebase][1]);
 177                 break;
 178         case SR_CONF_NUM_VDIV:
 179                 if (!cg)
 180                         return SR_ERR_CHANNEL_GROUP;
 181                 if (cg_type != CG_ANALOG)
 182                         return SR_ERR_NA;
 183                 if (std_cg_idx(cg, devc->analog_groups, model->analog_channels) < 0)
 184                         return SR_ERR_ARG;
 185                 *data = g_variant_new_int32(model->num_ydivs);
 186                 break;
 187         case SR_CONF_VDIV:
 188                 if (!cg)
 189                         return SR_ERR_CHANNEL_GROUP;
 190                 if (cg_type != CG_ANALOG)
 191                         return SR_ERR_NA;
 192                 if ((idx = std_cg_idx(cg, devc->analog_groups, model->analog_channels)) < 0)
 193                         return SR_ERR_ARG;
 194                 *data = g_variant_new("(tt)",
 195                                       (*model->vdivs)[state->analog_channels[idx].vdiv][0],
 196                                       (*model->vdivs)[state->analog_channels[idx].vdiv][1]);
 197                 break;
 198         case SR_CONF_TRIGGER_SOURCE:
 199                 *data = g_variant_new_string((*model->trigger_sources)[state->trigger_source]);
 200                 break;
 201         case SR_CONF_TRIGGER_SLOPE:
 202                 *data = g_variant_new_string((*model->trigger_slopes)[state->trigger_slope]);
 203                 break;
 204         case SR_CONF_HORIZ_TRIGGERPOS:
 205                 *data = g_variant_new_double(state->horiz_triggerpos);
 206                 break;
 207         case SR_CONF_COUPLING:
 208                 if (!cg)
 209                         return SR_ERR_CHANNEL_GROUP;
 210                 if (cg_type != CG_ANALOG)
 211                         return SR_ERR_NA;
 212                 if ((idx = std_cg_idx(cg, devc->analog_groups, model->analog_channels)) < 0)
 213                         return SR_ERR_ARG;
 214                 *data = g_variant_new_string((*model->coupling_options)[state->analog_channels[idx].coupling]);
 215                 break;
 216         case SR_CONF_SAMPLERATE:
 217                 *data = g_variant_new_uint64(state->sample_rate);
 218                 break;
 219         default:
 220                 return SR_ERR_NA;
 221         }
 222
 223         return SR_OK;
 224 }
 225
 226 static int config_set(uint32_t key, GVariant *data,
 227         const struct sr_dev_inst *sdi, const struct sr_channel_group *cg)
 228 {
 229         int ret, cg_type, idx, j;
 230         char command[MAX_COMMAND_SIZE], float_str[30];
 231         struct dev_context *devc;
 232         const struct scope_config *model;
 233         struct scope_state *state;
 234         double tmp_d;
 235         gboolean update_sample_rate;
 236
 237         if (!sdi)
 238                 return SR_ERR_ARG;
 239
 240         devc = sdi->priv;
 241
 242         if ((cg_type = check_channel_group(devc, cg)) == CG_INVALID)
 243                 return SR_ERR;
 244
 245         model = devc->model_config;
 246         state = devc->model_state;
 247         update_sample_rate = FALSE;
 248
 249         ret = SR_ERR_NA;
 250
 251         switch (key) {
 252         case SR_CONF_LIMIT_FRAMES:
 253                 devc->frame_limit = g_variant_get_uint64(data);
 254                 ret = SR_OK;
 255                 break;
 256         case SR_CONF_TRIGGER_SOURCE:
 257                 if ((idx = std_str_idx(data, *model->trigger_sources, model->num_trigger_sources)) < 0)
 258                         return SR_ERR_ARG;
 259                 state->trigger_source = idx;
 260                 g_snprintf(command, sizeof(command),
 261                            (*model->scpi_dialect)[SCPI_CMD_SET_TRIGGER_SOURCE],
 262                            (*model->trigger_sources)[idx]);
 263                 ret = sr_scpi_send(sdi->conn, command);
 264                 break;
 265         case SR_CONF_VDIV:
 266                 if (!cg)
 267                         return SR_ERR_CHANNEL_GROUP;
 268                 if ((idx = std_u64_tuple_idx(data, *model->vdivs, model->num_vdivs)) < 0)
 269                         return SR_ERR_ARG;
 270                 if ((j = std_cg_idx(cg, devc->analog_groups, model->analog_channels)) < 0)
 271                         return SR_ERR_ARG;
 272                 state->analog_channels[j].vdiv = idx;
 273                 g_ascii_formatd(float_str, sizeof(float_str), "%E",
 274                         (float) (*model->vdivs)[idx][0] / (*model->vdivs)[idx][1]);
 275                 g_snprintf(command, sizeof(command),
 276                            (*model->scpi_dialect)[SCPI_CMD_SET_VERTICAL_DIV],
 277                            j + 1, float_str);
 278                 if (sr_scpi_send(sdi->conn, command) != SR_OK ||
 279                     sr_scpi_get_opc(sdi->conn) != SR_OK)
 280                         return SR_ERR;
 281                 ret = SR_OK;
 282                 break;
 283         case SR_CONF_TIMEBASE:
 284                 if ((idx = std_u64_tuple_idx(data, *model->timebases, model->num_timebases)) < 0)
 285                         return SR_ERR_ARG;
 286                 state->timebase = idx;
 287                 g_ascii_formatd(float_str, sizeof(float_str), "%E",
 288                         (float) (*model->timebases)[idx][0] / (*model->timebases)[idx][1]);
 289                 g_snprintf(command, sizeof(command),
 290                            (*model->scpi_dialect)[SCPI_CMD_SET_TIMEBASE],
 291                            float_str);
 292                 ret = sr_scpi_send(sdi->conn, command);
 293                 update_sample_rate = TRUE;
 294                 break;
 295         case SR_CONF_HORIZ_TRIGGERPOS:
 296                 tmp_d = g_variant_get_double(data);
 297                 if (tmp_d < 0.0 || tmp_d > 1.0)
 298                         return SR_ERR;
 299                 state->horiz_triggerpos = tmp_d;
 300                 tmp_d = -(tmp_d - 0.5) *
 301                         ((double) (*model->timebases)[state->timebase][0] /
 302                         (*model->timebases)[state->timebase][1])
 303                          * model->num_xdivs;
 304                 g_ascii_formatd(float_str, sizeof(float_str), "%E", tmp_d);
 305                 g_snprintf(command, sizeof(command),
 306                            (*model->scpi_dialect)[SCPI_CMD_SET_HORIZ_TRIGGERPOS],
 307                            float_str);
 308                 ret = sr_scpi_send(sdi->conn, command);
 309                 break;
 310         case SR_CONF_TRIGGER_SLOPE:
 311                 if ((idx = std_str_idx(data, *model->trigger_slopes, model->num_trigger_slopes)) < 0)
 312                         return SR_ERR_ARG;
 313                 state->trigger_slope = idx;
 314                 g_snprintf(command, sizeof(command),
 315                            (*model->scpi_dialect)[SCPI_CMD_SET_TRIGGER_SLOPE],
 316                            (*model->trigger_slopes)[idx]);
 317                 ret = sr_scpi_send(sdi->conn, command);
 318                 break;
 319         case SR_CONF_COUPLING:
 320                 if (!cg)
 321                         return SR_ERR_CHANNEL_GROUP;
 322                 if ((idx = std_str_idx(data, *model->coupling_options, model->num_coupling_options)) < 0)
 323                         return SR_ERR_ARG;
 324                 if ((j = std_cg_idx(cg, devc->analog_groups, model->analog_channels)) < 0)
 325                         return SR_ERR_ARG;
 326                 state->analog_channels[j].coupling = idx;
 327                 g_snprintf(command, sizeof(command),
 328                            (*model->scpi_dialect)[SCPI_CMD_SET_COUPLING],
 329                            j + 1, (*model->coupling_options)[idx]);
 330                 if (sr_scpi_send(sdi->conn, command) != SR_OK ||
 331                     sr_scpi_get_opc(sdi->conn) != SR_OK)
 332                         return SR_ERR;
 333                 ret = SR_OK;
 334                 break;
 335         default:
 336                 ret = SR_ERR_NA;
 337                 break;
 338         }
 339
 340         if (ret == SR_OK)
 341                 ret = sr_scpi_get_opc(sdi->conn);
 342
 343         if (ret == SR_OK && update_sample_rate)
 344                 ret = hmo_update_sample_rate(sdi);
 345
 346         return ret;
 347 }
 348
 349 static int config_list(uint32_t key, GVariant **data,
 350         const struct sr_dev_inst *sdi, const struct sr_channel_group *cg)
 351 {
 352         int cg_type = CG_NONE;
 353         struct dev_context *devc = NULL;
 354         const struct scope_config *model = NULL;
 355
 356         if (sdi) {
 357                 devc = sdi->priv;
 358                 if ((cg_type = check_channel_group(devc, cg)) == CG_INVALID)
 359                         return SR_ERR;
 360
 361                 model = devc->model_config;
 362         }
 363
 364         switch (key) {
 365         case SR_CONF_SCAN_OPTIONS:
 366                 *data = std_gvar_array_u32(ARRAY_AND_SIZE(scanopts));
 367                 break;
 368         case SR_CONF_DEVICE_OPTIONS:
 369                 if (!cg) {
 370                         if (model)
 371                                 *data = std_gvar_array_u32((const uint32_t *)model->devopts, model->num_devopts);
 372                         else
 373                                 *data = std_gvar_array_u32(ARRAY_AND_SIZE(drvopts));
 374                 } else if (cg_type == CG_ANALOG) {
 375                         *data = std_gvar_array_u32((const uint32_t *)model->devopts_cg_analog, model->num_devopts_cg_analog);
 376                 } else {
 377                         *data = std_gvar_array_u32(NULL, 0);
 378                 }
 379                 break;
 380         case SR_CONF_COUPLING:
 381                 if (!cg)
 382                         return SR_ERR_CHANNEL_GROUP;
 383                 *data = g_variant_new_strv(*model->coupling_options, model->num_coupling_options);
 384                 break;
 385         case SR_CONF_TRIGGER_SOURCE:
 386                 if (!model)
 387                         return SR_ERR_ARG;
 388                 *data = g_variant_new_strv(*model->trigger_sources, model->num_trigger_sources);
 389                 break;
 390         case SR_CONF_TRIGGER_SLOPE:
 391                 if (!model)
 392                         return SR_ERR_ARG;
 393                 *data = g_variant_new_strv(*model->trigger_slopes, model->num_trigger_slopes);
 394                 break;
 395         case SR_CONF_TIMEBASE:
 396                 if (!model)
 397                         return SR_ERR_ARG;
 398                 *data = std_gvar_tuple_array(*model->timebases, model->num_timebases);
 399                 break;
 400         case SR_CONF_VDIV:
 401                 if (!cg)
 402                         return SR_ERR_CHANNEL_GROUP;
 403                 *data = std_gvar_tuple_array(*model->vdivs, model->num_vdivs);
 404                 break;
 405         default:
 406                 return SR_ERR_NA;
 407         }
 408
 409         return SR_OK;
 410 }
 411
 412 SR_PRIV int hmo_request_data(const struct sr_dev_inst *sdi)
 413 {
 414         char command[MAX_COMMAND_SIZE];
 415         struct sr_channel *ch;
 416         struct dev_context *devc;
 417         const struct scope_config *model;
 418
 419         devc = sdi->priv;
 420         model = devc->model_config;
 421
 422         ch = devc->current_channel->data;
 423
 424         switch (ch->type) {
 425         case SR_CHANNEL_ANALOG:
 426                 g_snprintf(command, sizeof(command),
 427                            (*model->scpi_dialect)[SCPI_CMD_GET_ANALOG_DATA],
 428 #ifdef WORDS_BIGENDIAN
 429                            "MSBF",
 430 #else
 431                            "LSBF",
 432 #endif
 433                            ch->index + 1);
 434                 break;
 435         case SR_CHANNEL_LOGIC:
 436                 g_snprintf(command, sizeof(command),
 437                            (*model->scpi_dialect)[SCPI_CMD_GET_DIG_DATA],
 438                            ch->index < 8 ? 1 : 2);
 439                 break;
 440         default:
 441                 sr_err("Invalid channel type.");
 442                 break;
 443         }
 444
 445         return sr_scpi_send(sdi->conn, command);
 446 }
 447
 448 static int hmo_check_channels(GSList *channels)
 449 {
 450         GSList *l;
 451         struct sr_channel *ch;
 452         gboolean enabled_chan[MAX_ANALOG_CHANNEL_COUNT];
 453         gboolean enabled_pod[MAX_DIGITAL_GROUP_COUNT];
 454         size_t idx;
 455
 456         /* Preset "not enabled" for all channels / pods. */
 457         for (idx = 0; idx < ARRAY_SIZE(enabled_chan); idx++)
 458                 enabled_chan[idx] = FALSE;
 459         for (idx = 0; idx < ARRAY_SIZE(enabled_pod); idx++)
 460                 enabled_pod[idx] = FALSE;
 461
 462         /*
 463          * Determine which channels / pods are required for the caller's
 464          * specified configuration.
 465          */
 466         for (l = channels; l; l = l->next) {
 467                 ch = l->data;
 468                 switch (ch->type) {
 469                 case SR_CHANNEL_ANALOG:
 470                         idx = ch->index;
 471                         if (idx < ARRAY_SIZE(enabled_chan))
 472                                 enabled_chan[idx] = TRUE;
 473                         break;
 474                 case SR_CHANNEL_LOGIC:
 475                         idx = ch->index / 8;
 476                         if (idx < ARRAY_SIZE(enabled_pod))
 477                                 enabled_pod[idx] = TRUE;
 478                         break;
 479                 default:
 480                         return SR_ERR;
 481                 }
 482         }
 483
 484         /*
 485          * Check for resource conflicts. Some channels can be either
 486          * analog or digital, but never both at the same time.
 487          *
 488          * Note that the constraints might depend on the specific model.
 489          * These tests might need some adjustment when support for more
 490          * models gets added to the driver.
 491          */
 492         if (enabled_pod[0] && enabled_chan[2])
 493                 return SR_ERR;
 494         if (enabled_pod[1] && enabled_chan[3])
 495                 return SR_ERR;
 496         return SR_OK;
 497 }
 498
 499 static int hmo_setup_channels(const struct sr_dev_inst *sdi)
 500 {
 501         GSList *l;
 502         unsigned int i;
 503         gboolean *pod_enabled, setup_changed;
 504         char command[MAX_COMMAND_SIZE];
 505         struct scope_state *state;
 506         const struct scope_config *model;
 507         struct sr_channel *ch;
 508         struct dev_context *devc;
 509         struct sr_scpi_dev_inst *scpi;
 510
 511         devc = sdi->priv;
 512         scpi = sdi->conn;
 513         state = devc->model_state;
 514         model = devc->model_config;
 515         setup_changed = FALSE;
 516
 517         pod_enabled = g_try_malloc0(sizeof(gboolean) * model->digital_pods);
 518
 519         for (l = sdi->channels; l; l = l->next) {
 520                 ch = l->data;
 521                 switch (ch->type) {
 522                 case SR_CHANNEL_ANALOG:
 523                         if (ch->enabled == state->analog_channels[ch->index].state)
 524                                 break;
 525                         g_snprintf(command, sizeof(command),
 526                                    (*model->scpi_dialect)[SCPI_CMD_SET_ANALOG_CHAN_STATE],
 527                                    ch->index + 1, ch->enabled);
 528
 529                         if (sr_scpi_send(scpi, command) != SR_OK)
 530                                 return SR_ERR;
 531                         state->analog_channels[ch->index].state = ch->enabled;
 532                         setup_changed = TRUE;
 533                         break;
 534                 case SR_CHANNEL_LOGIC:
 535                         /*
 536                          * A digital POD needs to be enabled for every group of
 537                          * 8 channels.
 538                          */
 539                         if (ch->enabled)
 540                                 pod_enabled[ch->index < 8 ? 0 : 1] = TRUE;
 541
 542                         if (ch->enabled == state->digital_channels[ch->index])
 543                                 break;
 544                         g_snprintf(command, sizeof(command),
 545                                    (*model->scpi_dialect)[SCPI_CMD_SET_DIG_CHAN_STATE],
 546                                    ch->index, ch->enabled);
 547
 548                         if (sr_scpi_send(scpi, command) != SR_OK)
 549                                 return SR_ERR;
 550
 551                         state->digital_channels[ch->index] = ch->enabled;
 552                         setup_changed = TRUE;
 553                         break;
 554                 default:
 555                         return SR_ERR;
 556                 }
 557         }
 558
 559         for (i = 0; i < model->digital_pods; i++) {
 560                 if (state->digital_pods[i] == pod_enabled[i])
 561                         continue;
 562                 g_snprintf(command, sizeof(command),
 563                            (*model->scpi_dialect)[SCPI_CMD_SET_DIG_POD_STATE],
 564                            i + 1, pod_enabled[i]);
 565                 if (sr_scpi_send(scpi, command) != SR_OK)
 566                         return SR_ERR;
 567                 state->digital_pods[i] = pod_enabled[i];
 568                 setup_changed = TRUE;
 569         }
 570
 571         g_free(pod_enabled);
 572
 573         if (setup_changed && hmo_update_sample_rate(sdi) != SR_OK)
 574                 return SR_ERR;
 575
 576         return SR_OK;
 577 }
 578
 579 static int dev_acquisition_start(const struct sr_dev_inst *sdi)
 580 {
 581         GSList *l;
 582         gboolean digital_added[MAX_DIGITAL_GROUP_COUNT];
 583         size_t group, pod_count;
 584         struct sr_channel *ch;
 585         struct dev_context *devc;
 586         struct sr_scpi_dev_inst *scpi;
 587         int ret;
 588
 589         scpi = sdi->conn;
 590         devc = sdi->priv;
 591
 592         /* Preset empty results. */
 593         for (group = 0; group < ARRAY_SIZE(digital_added); group++)
 594                 digital_added[group] = FALSE;
 595         g_slist_free(devc->enabled_channels);
 596         devc->enabled_channels = NULL;
 597
 598         /*
 599          * Contruct the list of enabled channels. Determine the highest
 600          * number of digital pods involved in the acquisition.
 601          */
 602         pod_count = 0;
 603         for (l = sdi->channels; l; l = l->next) {
 604                 ch = l->data;
 605                 if (!ch->enabled)
 606                         continue;
 607                 /* Only add a single digital channel per group (pod). */
 608                 group = ch->index / 8;
 609                 if (ch->type != SR_CHANNEL_LOGIC || !digital_added[group]) {
 610                         devc->enabled_channels = g_slist_append(
 611                                         devc->enabled_channels, ch);
 612                         if (ch->type == SR_CHANNEL_LOGIC) {
 613                                 digital_added[group] = TRUE;
 614                                 if (pod_count < group + 1)
 615                                         pod_count = group + 1;
 616                         }
 617                 }
 618         }
 619         if (!devc->enabled_channels)
 620                 return SR_ERR;
 621         devc->pod_count = pod_count;
 622         devc->logic_data = NULL;
 623
 624         /*
 625          * Check constraints. Some channels can be either analog or
 626          * digital, but not both at the same time.
 627          */
 628         if (hmo_check_channels(devc->enabled_channels) != SR_OK) {
 629                 sr_err("Invalid channel configuration specified!");
 630                 ret = SR_ERR_NA;
 631                 goto free_enabled;
 632         }
 633
 634         /*
 635          * Configure the analog and digital channels and the
 636          * corresponding digital pods.
 637          */
 638         if (hmo_setup_channels(sdi) != SR_OK) {
 639                 sr_err("Failed to setup channel configuration!");
 640                 ret = SR_ERR;
 641                 goto free_enabled;
 642         }
 643
 644         /*
 645          * Start acquisition on the first enabled channel. The
 646          * receive routine will continue driving the acquisition.
 647          */
 648         sr_scpi_source_add(sdi->session, scpi, G_IO_IN, 50,
 649                         hmo_receive_data, (void *)sdi);
 650
 651         std_session_send_df_header(sdi);
 652
 653         devc->current_channel = devc->enabled_channels;
 654
 655         return hmo_request_data(sdi);
 656
 657 free_enabled:
 658         g_slist_free(devc->enabled_channels);
 659         devc->enabled_channels = NULL;
 660         return ret;
 661 }
 662
 663 static int dev_acquisition_stop(struct sr_dev_inst *sdi)
 664 {
 665         struct dev_context *devc;
 666         struct sr_scpi_dev_inst *scpi;
 667
 668         std_session_send_df_end(sdi);
 669
 670         devc = sdi->priv;
 671
 672         devc->num_frames = 0;
 673         g_slist_free(devc->enabled_channels);
 674         devc->enabled_channels = NULL;
 675         scpi = sdi->conn;
 676         sr_scpi_source_remove(sdi->session, scpi);
 677
 678         return SR_OK;
 679 }
 680
 681 static struct sr_dev_driver hameg_hmo_driver_info = {
 682         .name = "hameg-hmo",
 683         .longname = "Hameg HMO",
 684         .api_version = 1,
 685         .init = std_init,
 686         .cleanup = std_cleanup,
 687         .scan = scan,
 688         .dev_list = std_dev_list,
 689         .dev_clear = dev_clear,
 690         .config_get = config_get,
 691         .config_set = config_set,
 692         .config_list = config_list,
 693         .dev_open = dev_open,
 694         .dev_close = dev_close,
 695         .dev_acquisition_start = dev_acquisition_start,
 696         .dev_acquisition_stop = dev_acquisition_stop,
 697         .context = NULL,
 698 };
 699 SR_REGISTER_DEV_DRIVER(hameg_hmo_driver_info);