src/hardware/yokogawa-dlm/api.c

   1 /*
   2  * This file is part of the libsigrok project.
   3  *
   4  * Copyright (C) 2014 abraxa (Soeren Apel) <soeren@apelpie.net>
   5  * Based on the Hameg HMO driver by poljar (Damir Jelić) <poljarinho@gmail.com>
   6  *
   7  * This program is free software: you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation, either version 3 of the License, or
  10  * (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  19  */
  20
  21 #include <config.h>
  22 #include <stdlib.h>
  23 #include "scpi.h"
  24 #include "protocol.h"
  25
  26 static struct sr_dev_driver yokogawa_dlm_driver_info;
  27
  28 static const char *MANUFACTURER_ID = "YOKOGAWA";
  29 static const char *MANUFACTURER_NAME = "Yokogawa";
  30
  31 static const uint32_t dlm_scanopts[] = {
  32         SR_CONF_CONN,
  33 };
  34
  35 static const uint32_t dlm_drvopts[] = {
  36         SR_CONF_LOGIC_ANALYZER,
  37         SR_CONF_OSCILLOSCOPE,
  38 };
  39
  40 static const uint32_t dlm_devopts[] = {
  41         SR_CONF_LIMIT_FRAMES | SR_CONF_GET | SR_CONF_SET,
  42         SR_CONF_SAMPLERATE | SR_CONF_GET,
  43         SR_CONF_TIMEBASE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  44         SR_CONF_NUM_HDIV | SR_CONF_GET,
  45         SR_CONF_HORIZ_TRIGGERPOS | SR_CONF_GET | SR_CONF_SET,
  46         SR_CONF_TRIGGER_SOURCE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  47         SR_CONF_TRIGGER_SLOPE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  48 };
  49
  50 static const uint32_t dlm_analog_devopts[] = {
  51         SR_CONF_NUM_VDIV | SR_CONF_GET,
  52         SR_CONF_VDIV | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  53         SR_CONF_COUPLING | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  54 };
  55
  56 static const uint32_t dlm_digital_devopts[] = {
  57 };
  58
  59 enum {
  60         CG_INVALID = -1,
  61         CG_NONE,
  62         CG_ANALOG,
  63         CG_DIGITAL,
  64 };
  65
  66 static struct sr_dev_inst *probe_usbtmc_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         char *model_name;
  72         int model_index;
  73
  74         sdi = NULL;
  75         devc = NULL;
  76         hw_info = NULL;
  77
  78         if (sr_scpi_get_hw_id(scpi, &hw_info) != SR_OK) {
  79                 sr_info("Couldn't get IDN response.");
  80                 goto fail;
  81         }
  82
  83         if (strcmp(hw_info->manufacturer, MANUFACTURER_ID) != 0)
  84                 goto fail;
  85
  86         if (dlm_model_get(hw_info->model, &model_name, &model_index) != SR_OK)
  87                 goto fail;
  88
  89         sdi = g_malloc0(sizeof(struct sr_dev_inst));
  90         sdi->vendor = g_strdup(MANUFACTURER_NAME);
  91         sdi->model = g_strdup(model_name);
  92         sdi->version = g_strdup(hw_info->firmware_version);
  93
  94         sdi->serial_num = g_strdup(hw_info->serial_number);
  95
  96         sr_scpi_hw_info_free(hw_info);
  97         hw_info = NULL;
  98
  99         devc = g_malloc0(sizeof(struct dev_context));
 100
 101         sdi->driver = &yokogawa_dlm_driver_info;
 102         sdi->priv = devc;
 103         sdi->inst_type = SR_INST_SCPI;
 104         sdi->conn = scpi;
 105
 106         if (dlm_device_init(sdi, model_index) != SR_OK)
 107                 goto fail;
 108
 109         return sdi;
 110
 111 fail:
 112         sr_scpi_hw_info_free(hw_info);
 113         sr_dev_inst_free(sdi);
 114         g_free(devc);
 115
 116         return NULL;
 117 }
 118
 119 static GSList *scan(struct sr_dev_driver *di, GSList *options)
 120 {
 121         return sr_scpi_scan(di->context, options, probe_usbtmc_device);
 122 }
 123
 124 static void clear_helper(void *priv)
 125 {
 126         struct dev_context *devc;
 127
 128         devc = priv;
 129
 130         dlm_scope_state_destroy(devc->model_state);
 131
 132         g_free(devc->analog_groups);
 133         g_free(devc->digital_groups);
 134         g_free(devc);
 135 }
 136
 137 static int dev_clear(const struct sr_dev_driver *di)
 138 {
 139         return std_dev_clear(di, clear_helper);
 140 }
 141
 142 static int dev_open(struct sr_dev_inst *sdi)
 143 {
 144         if (sr_scpi_open(sdi->conn) != SR_OK)
 145                 return SR_ERR;
 146
 147         if (dlm_scope_state_query(sdi) != SR_OK)
 148                 return SR_ERR;
 149
 150         return SR_OK;
 151 }
 152
 153 static int dev_close(struct sr_dev_inst *sdi)
 154 {
 155         sr_scpi_close(sdi->conn);
 156
 157         sdi->status = SR_ST_INACTIVE;
 158
 159         return SR_OK;
 160 }
 161
 162 /**
 163  * Check which category a given channel group belongs to.
 164  *
 165  * @param devc Our internal device context.
 166  * @param cg The channel group to check.
 167  *
 168  * @retval CG_NONE cg is NULL
 169  * @retval CG_ANALOG cg is an analog group
 170  * @retval CG_DIGITAL cg is a digital group
 171  * @retval CG_INVALID cg is something else
 172  */
 173 static int check_channel_group(struct dev_context *devc,
 174                         const struct sr_channel_group *cg)
 175 {
 176         unsigned int i;
 177         const struct scope_config *model;
 178
 179         model = devc->model_config;
 180
 181         if (!cg)
 182                 return CG_NONE;
 183
 184         for (i = 0; i < model->analog_channels; i++)
 185                 if (cg == devc->analog_groups[i])
 186                         return CG_ANALOG;
 187
 188         for (i = 0; i < model->pods; i++)
 189                 if (cg == devc->digital_groups[i])
 190                         return CG_DIGITAL;
 191
 192         sr_err("Invalid channel group specified.");
 193         return CG_INVALID;
 194 }
 195
 196 static int config_get(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
 197                 const struct sr_channel_group *cg)
 198 {
 199         int ret, cg_type;
 200         unsigned int i;
 201         struct dev_context *devc;
 202         const struct scope_config *model;
 203         struct scope_state *state;
 204
 205         if (!sdi)
 206                 return SR_ERR_ARG;
 207
 208         devc = sdi->priv;
 209
 210         if ((cg_type = check_channel_group(devc, cg)) == CG_INVALID)
 211                 return SR_ERR;
 212
 213         model = devc->model_config;
 214         state = devc->model_state;
 215
 216         switch (key) {
 217         case SR_CONF_NUM_HDIV:
 218                 *data = g_variant_new_int32(model->num_xdivs);
 219                 ret = SR_OK;
 220                 break;
 221         case SR_CONF_TIMEBASE:
 222                 *data = g_variant_new("(tt)",
 223                                 dlm_timebases[state->timebase][0],
 224                                 dlm_timebases[state->timebase][1]);
 225                 ret = SR_OK;
 226                 break;
 227         case SR_CONF_NUM_VDIV:
 228                 if (cg_type == CG_NONE) {
 229                         sr_err("No channel group specified.");
 230                         return SR_ERR_CHANNEL_GROUP;
 231                 } else if (cg_type == CG_ANALOG) {
 232                                 *data = g_variant_new_int32(model->num_ydivs);
 233                                 ret = SR_OK;
 234                                 break;
 235                 } else {
 236                         ret = SR_ERR_NA;
 237                 }
 238                 break;
 239         case SR_CONF_VDIV:
 240                 ret = SR_ERR_NA;
 241                 if (cg_type == CG_NONE) {
 242                         sr_err("No channel group specified.");
 243                         return SR_ERR_CHANNEL_GROUP;
 244                 } else if (cg_type != CG_ANALOG)
 245                         break;
 246
 247                 for (i = 0; i < model->analog_channels; i++) {
 248                         if (cg != devc->analog_groups[i])
 249                                 continue;
 250                         *data = g_variant_new("(tt)",
 251                                         dlm_vdivs[state->analog_states[i].vdiv][0],
 252                                         dlm_vdivs[state->analog_states[i].vdiv][1]);
 253                         ret = SR_OK;
 254                         break;
 255                 }
 256                 break;
 257         case SR_CONF_TRIGGER_SOURCE:
 258                 *data = g_variant_new_string((*model->trigger_sources)[state->trigger_source]);
 259                 ret = SR_OK;
 260                 break;
 261         case SR_CONF_TRIGGER_SLOPE:
 262                 *data = g_variant_new_string(dlm_trigger_slopes[state->trigger_slope]);
 263                 ret = SR_OK;
 264                 break;
 265         case SR_CONF_HORIZ_TRIGGERPOS:
 266                 *data = g_variant_new_double(state->horiz_triggerpos);
 267                 ret = SR_OK;
 268                 break;
 269         case SR_CONF_COUPLING:
 270                 ret = SR_ERR_NA;
 271                 if (cg_type == CG_NONE) {
 272                         sr_err("No channel group specified.");
 273                         return SR_ERR_CHANNEL_GROUP;
 274                 } else if (cg_type != CG_ANALOG)
 275                         break;
 276
 277                 for (i = 0; i < model->analog_channels; i++) {
 278                         if (cg != devc->analog_groups[i])
 279                                 continue;
 280                         *data = g_variant_new_string((*model->coupling_options)[state->analog_states[i].coupling]);
 281                         ret = SR_OK;
 282                         break;
 283                 }
 284                 break;
 285         case SR_CONF_SAMPLERATE:
 286                 *data = g_variant_new_uint64(state->sample_rate);
 287                 ret = SR_OK;
 288                 break;
 289         default:
 290                 ret = SR_ERR_NA;
 291         }
 292
 293         return ret;
 294 }
 295
 296 static GVariant *build_tuples(const uint64_t (*array)[][2], unsigned int n)
 297 {
 298         unsigned int i;
 299         GVariant *rational[2];
 300         GVariantBuilder gvb;
 301
 302         g_variant_builder_init(&gvb, G_VARIANT_TYPE_ARRAY);
 303
 304         for (i = 0; i < n; i++) {
 305                 rational[0] = g_variant_new_uint64((*array)[i][0]);
 306                 rational[1] = g_variant_new_uint64((*array)[i][1]);
 307
 308                 /* FIXME: Valgrind reports a memory leak here. */
 309                 g_variant_builder_add_value(&gvb, g_variant_new_tuple(rational, 2));
 310         }
 311
 312         return g_variant_builder_end(&gvb);
 313 }
 314
 315 static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sdi,
 316                 const struct sr_channel_group *cg)
 317 {
 318         int ret, cg_type;
 319         unsigned int i, j;
 320         char float_str[30];
 321         struct dev_context *devc;
 322         const struct scope_config *model;
 323         struct scope_state *state;
 324         const char *tmp;
 325         uint64_t p, q;
 326         double tmp_d;
 327         gboolean update_sample_rate;
 328
 329         if (!sdi || !(devc = sdi->priv))
 330                 return SR_ERR_ARG;
 331
 332         if ((cg_type = check_channel_group(devc, cg)) == CG_INVALID)
 333                 return SR_ERR;
 334
 335         model = devc->model_config;
 336         state = devc->model_state;
 337         update_sample_rate = FALSE;
 338
 339         ret = SR_ERR_NA;
 340
 341         switch (key) {
 342         case SR_CONF_LIMIT_FRAMES:
 343                 devc->frame_limit = g_variant_get_uint64(data);
 344                 ret = SR_OK;
 345                 break;
 346         case SR_CONF_TRIGGER_SOURCE:
 347                 tmp = g_variant_get_string(data, NULL);
 348                 for (i = 0; (*model->trigger_sources)[i]; i++) {
 349                         if (g_strcmp0(tmp, (*model->trigger_sources)[i]) != 0)
 350                                 continue;
 351                         state->trigger_source = i;
 352                         /* TODO: A and B trigger support possible? */
 353                         ret = dlm_trigger_source_set(sdi->conn, (*model->trigger_sources)[i]);
 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 < ARRAY_SIZE(dlm_vdivs); i++) {
 366                         if (p != dlm_vdivs[i][0] ||
 367                                         q != dlm_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_states[j - 1].vdiv = i;
 373                                 g_ascii_formatd(float_str, sizeof(float_str),
 374                                                 "%E", (float) p / q);
 375                                 if (dlm_analog_chan_vdiv_set(sdi->conn, j, float_str) != SR_OK ||
 376                                                 sr_scpi_get_opc(sdi->conn) != SR_OK)
 377                                         return SR_ERR;
 378
 379                                 break;
 380                         }
 381
 382                         ret = SR_OK;
 383                         break;
 384                 }
 385                 break;
 386         case SR_CONF_TIMEBASE:
 387                 g_variant_get(data, "(tt)", &p, &q);
 388
 389                 for (i = 0; i < ARRAY_SIZE(dlm_timebases); i++) {
 390                         if (p != dlm_timebases[i][0] ||
 391                                         q != dlm_timebases[i][1])
 392                                 continue;
 393                         state->timebase = i;
 394                         g_ascii_formatd(float_str, sizeof(float_str),
 395                                         "%E", (float) p / q);
 396                         ret = dlm_timebase_set(sdi->conn, float_str);
 397                         update_sample_rate = TRUE;
 398                         break;
 399                 }
 400                 break;
 401         case SR_CONF_HORIZ_TRIGGERPOS:
 402                 tmp_d = g_variant_get_double(data);
 403
 404                 /* TODO: Check if the calculation makes sense for the DLM. */
 405                 if (tmp_d < 0.0 || tmp_d > 1.0)
 406                         return SR_ERR;
 407
 408                 state->horiz_triggerpos = tmp_d;
 409                 tmp_d = -(tmp_d - 0.5) *
 410                                 ((double) dlm_timebases[state->timebase][0] /
 411                                 dlm_timebases[state->timebase][1])
 412                                 * model->num_xdivs;
 413
 414                 g_ascii_formatd(float_str, sizeof(float_str), "%E", tmp_d);
 415                 ret = dlm_horiz_trigger_pos_set(sdi->conn, float_str);
 416                 break;
 417         case SR_CONF_TRIGGER_SLOPE:
 418                 tmp = g_variant_get_string(data, NULL);
 419
 420                 if (!tmp || !(tmp[0] == 'f' || tmp[0] == 'r'))
 421                         return SR_ERR_ARG;
 422
 423                 /* Note: See dlm_trigger_slopes[] in protocol.c. */
 424                 state->trigger_slope = (tmp[0] == 'r') ?
 425                                 SLOPE_POSITIVE : SLOPE_NEGATIVE;
 426
 427                 ret = dlm_trigger_slope_set(sdi->conn, state->trigger_slope);
 428                 break;
 429         case SR_CONF_COUPLING:
 430                 if (cg_type == CG_NONE) {
 431                         sr_err("No channel group specified.");
 432                         return SR_ERR_CHANNEL_GROUP;
 433                 }
 434
 435                 tmp = g_variant_get_string(data, NULL);
 436
 437                 for (i = 0; (*model->coupling_options)[i]; i++) {
 438                         if (strcmp(tmp, (*model->coupling_options)[i]) != 0)
 439                                 continue;
 440                         for (j = 1; j <= model->analog_channels; j++) {
 441                                 if (cg != devc->analog_groups[j - 1])
 442                                         continue;
 443                                 state->analog_states[j-1].coupling = i;
 444
 445                                 if (dlm_analog_chan_coupl_set(sdi->conn, j, tmp) != SR_OK ||
 446                                                 sr_scpi_get_opc(sdi->conn) != SR_OK)
 447                                         return SR_ERR;
 448                                 break;
 449                         }
 450
 451                         ret = SR_OK;
 452                         break;
 453                 }
 454                 break;
 455         default:
 456                 ret = SR_ERR_NA;
 457                 break;
 458         }
 459
 460         if (ret == SR_OK)
 461                 ret = sr_scpi_get_opc(sdi->conn);
 462
 463         if (ret == SR_OK && update_sample_rate)
 464                 ret = dlm_sample_rate_query(sdi);
 465
 466         return ret;
 467 }
 468
 469 static int config_channel_set(const struct sr_dev_inst *sdi,
 470                         struct sr_channel *ch, unsigned int changes)
 471 {
 472         /* Currently we only handle SR_CHANNEL_SET_ENABLED. */
 473         if (changes != SR_CHANNEL_SET_ENABLED)
 474                 return SR_ERR_NA;
 475
 476         return dlm_channel_state_set(sdi, ch->index, ch->enabled);
 477 }
 478
 479 static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
 480                 const struct sr_channel_group *cg)
 481 {
 482         int cg_type = CG_NONE;
 483         struct dev_context *devc = NULL;
 484         const struct scope_config *model = NULL;
 485
 486         /* SR_CONF_SCAN_OPTIONS is always valid, regardless of sdi or channel group. */
 487         if (key == SR_CONF_SCAN_OPTIONS) {
 488                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 489                                 dlm_scanopts, ARRAY_SIZE(dlm_scanopts), sizeof(uint32_t));
 490                 return SR_OK;
 491         }
 492
 493         /* If sdi is NULL, nothing except SR_CONF_DEVICE_OPTIONS can be provided. */
 494         if (key == SR_CONF_DEVICE_OPTIONS && !sdi) {
 495                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 496                                 dlm_drvopts, ARRAY_SIZE(dlm_drvopts), sizeof(uint32_t));
 497                 return SR_OK;
 498         }
 499
 500         if (!sdi)
 501                 return SR_ERR_ARG;
 502
 503         devc = sdi->priv;
 504         model = devc->model_config;
 505
 506         /*
 507          * If cg is NULL, only the SR_CONF_DEVICE_OPTIONS that are not
 508          * specific to a channel group must be returned.
 509          */
 510         if (!cg) {
 511                 switch (key) {
 512                 case SR_CONF_DEVICE_OPTIONS:
 513                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 514                                         dlm_devopts, ARRAY_SIZE(dlm_devopts), sizeof(uint32_t));
 515                         return SR_OK;
 516                 case SR_CONF_TIMEBASE:
 517                         *data = build_tuples(&dlm_timebases, ARRAY_SIZE(dlm_timebases));
 518                         return SR_OK;
 519                 case SR_CONF_TRIGGER_SOURCE:
 520                         if (!model)
 521                                 return SR_ERR_ARG;
 522                         *data = g_variant_new_strv(*model->trigger_sources,
 523                                         g_strv_length((char **)*model->trigger_sources));
 524                         return SR_OK;
 525                 case SR_CONF_TRIGGER_SLOPE:
 526                         *data = g_variant_new_strv(dlm_trigger_slopes,
 527                                         g_strv_length((char **)dlm_trigger_slopes));
 528                         return SR_OK;
 529                 case SR_CONF_NUM_HDIV:
 530                         *data = g_variant_new_uint32(model->num_xdivs);
 531                         return SR_OK;
 532                 default:
 533                         return SR_ERR_NA;
 534                 }
 535         }
 536
 537         if ((cg_type = check_channel_group(devc, cg)) == CG_INVALID)
 538                 return SR_ERR;
 539
 540         switch (key) {
 541         case SR_CONF_DEVICE_OPTIONS:
 542                 if (cg_type == CG_ANALOG) {
 543                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 544                                 dlm_analog_devopts, ARRAY_SIZE(dlm_analog_devopts), sizeof(uint32_t));
 545                 } else if (cg_type == CG_DIGITAL) {
 546                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 547                                 dlm_digital_devopts, ARRAY_SIZE(dlm_digital_devopts), sizeof(uint32_t));
 548                 } else {
 549                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 550                                 NULL, 0, sizeof(uint32_t));
 551                 }
 552                 break;
 553         case SR_CONF_COUPLING:
 554                 if (cg_type == CG_NONE)
 555                         return SR_ERR_CHANNEL_GROUP;
 556                 *data = g_variant_new_strv(*model->coupling_options,
 557                                 g_strv_length((char **)*model->coupling_options));
 558                 break;
 559         case SR_CONF_VDIV:
 560                 if (cg_type == CG_NONE)
 561                         return SR_ERR_CHANNEL_GROUP;
 562                 *data = build_tuples(&dlm_vdivs, ARRAY_SIZE(dlm_vdivs));
 563                 break;
 564         default:
 565                 return SR_ERR_NA;
 566         }
 567
 568         return SR_OK;
 569 }
 570
 571 static int dlm_check_channels(GSList *channels)
 572 {
 573         GSList *l;
 574         struct sr_channel *ch;
 575         gboolean enabled_pod1, enabled_chan4;
 576
 577         enabled_pod1 = enabled_chan4 = FALSE;
 578
 579         /* Note: On the DLM2000, CH4 and Logic are shared. */
 580         /* TODO Handle non-DLM2000 models. */
 581         for (l = channels; l; l = l->next) {
 582                 ch = l->data;
 583                 switch (ch->type) {
 584                 case SR_CHANNEL_ANALOG:
 585                         if (ch->index == 3)
 586                                 enabled_chan4 = TRUE;
 587                         break;
 588                 case SR_CHANNEL_LOGIC:
 589                         enabled_pod1 = TRUE;
 590                         break;
 591                 default:
 592                         return SR_ERR;
 593                 }
 594         }
 595
 596         if (enabled_pod1 && enabled_chan4)
 597                 return SR_ERR;
 598
 599         return SR_OK;
 600 }
 601
 602 static int dev_acquisition_start(const struct sr_dev_inst *sdi)
 603 {
 604         GSList *l;
 605         gboolean digital_added;
 606         struct sr_channel *ch;
 607         struct dev_context *devc;
 608         struct sr_scpi_dev_inst *scpi;
 609
 610         scpi = sdi->conn;
 611         devc = sdi->priv;
 612         digital_added = FALSE;
 613
 614         g_slist_free(devc->enabled_channels);
 615         devc->enabled_channels = NULL;
 616
 617         for (l = sdi->channels; l; l = l->next) {
 618                 ch = l->data;
 619                 if (!ch->enabled)
 620                         continue;
 621                 /* Only add a single digital channel. */
 622                 if (ch->type != SR_CHANNEL_LOGIC || !digital_added) {
 623                         devc->enabled_channels = g_slist_append(
 624                                 devc->enabled_channels, ch);
 625                         if (ch->type == SR_CHANNEL_LOGIC)
 626                                 digital_added = TRUE;
 627                 }
 628         }
 629
 630         if (!devc->enabled_channels)
 631                 return SR_ERR;
 632
 633         if (dlm_check_channels(devc->enabled_channels) != SR_OK) {
 634                 sr_err("Invalid channel configuration specified!");
 635                 return SR_ERR_NA;
 636         }
 637
 638         /* Request data for the first enabled channel. */
 639         devc->current_channel = devc->enabled_channels;
 640         dlm_channel_data_request(sdi);
 641
 642         /* Call our callback when data comes in or after 5ms. */
 643         sr_scpi_source_add(sdi->session, scpi, G_IO_IN, 5,
 644                         dlm_data_receive, (void *)sdi);
 645
 646         return SR_OK;
 647 }
 648
 649 static int dev_acquisition_stop(struct sr_dev_inst *sdi)
 650 {
 651         struct dev_context *devc;
 652
 653         std_session_send_df_end(sdi);
 654
 655         devc = sdi->priv;
 656
 657         devc->num_frames = 0;
 658         g_slist_free(devc->enabled_channels);
 659         devc->enabled_channels = NULL;
 660
 661         sr_scpi_source_remove(sdi->session, sdi->conn);
 662
 663         return SR_OK;
 664 }
 665
 666 static struct sr_dev_driver yokogawa_dlm_driver_info = {
 667         .name = "yokogawa-dlm",
 668         .longname = "Yokogawa DL/DLM",
 669         .api_version = 1,
 670         .init = std_init,
 671         .cleanup = std_cleanup,
 672         .scan = scan,
 673         .dev_list = std_dev_list,
 674         .dev_clear = dev_clear,
 675         .config_get = config_get,
 676         .config_set = config_set,
 677         .config_channel_set = config_channel_set,
 678         .config_list = config_list,
 679         .dev_open = dev_open,
 680         .dev_close = dev_close,
 681         .dev_acquisition_start = dev_acquisition_start,
 682         .dev_acquisition_stop = dev_acquisition_stop,
 683         .context = NULL,
 684 };
 685 SR_REGISTER_DEV_DRIVER(yokogawa_dlm_driver_info);