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 SR_PRIV 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_SLOPE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  47         SR_CONF_TRIGGER_SOURCE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  48 };
  49
  50 static const uint32_t dlm_analog_devopts[] = {
  51         SR_CONF_COUPLING | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  52         SR_CONF_VDIV | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  53         SR_CONF_NUM_VDIV | SR_CONF_GET,
  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         if (hw_info)
 113                 sr_scpi_hw_info_free(hw_info);
 114         if (sdi)
 115                 sr_dev_inst_free(sdi);
 116         g_free(devc);
 117
 118         return NULL;
 119 }
 120
 121 static GSList *scan(struct sr_dev_driver *di, GSList *options)
 122 {
 123         return sr_scpi_scan(di->context, options, probe_usbtmc_device);
 124 }
 125
 126 static void clear_helper(void *priv)
 127 {
 128         struct dev_context *devc;
 129
 130         devc = priv;
 131
 132         dlm_scope_state_destroy(devc->model_state);
 133
 134         g_free(devc->analog_groups);
 135         g_free(devc->digital_groups);
 136         g_free(devc);
 137 }
 138
 139 static int dev_clear(const struct sr_dev_driver *di)
 140 {
 141         return std_dev_clear(di, clear_helper);
 142 }
 143
 144 static int dev_open(struct sr_dev_inst *sdi)
 145 {
 146         if (sdi->status != SR_ST_ACTIVE && sr_scpi_open(sdi->conn) != SR_OK)
 147                 return SR_ERR;
 148
 149         if (dlm_scope_state_query(sdi) != SR_OK)
 150                 return SR_ERR;
 151
 152         sdi->status = SR_ST_ACTIVE;
 153
 154         return SR_OK;
 155 }
 156
 157 static int dev_close(struct sr_dev_inst *sdi)
 158 {
 159         if (sdi->status == SR_ST_INACTIVE)
 160                 return SR_OK;
 161
 162         sr_scpi_close(sdi->conn);
 163
 164         sdi->status = SR_ST_INACTIVE;
 165
 166         return SR_OK;
 167 }
 168
 169 /**
 170  * Check which category a given channel group belongs to.
 171  *
 172  * @param devc Our internal device context.
 173  * @param cg The channel group to check.
 174  *
 175  * @retval CG_NONE cg is NULL
 176  * @retval CG_ANALOG cg is an analog group
 177  * @retval CG_DIGITAL cg is a digital group
 178  * @retval CG_INVALID cg is something else
 179  */
 180 static int check_channel_group(struct dev_context *devc,
 181                         const struct sr_channel_group *cg)
 182 {
 183         unsigned int i;
 184         const struct scope_config *model;
 185
 186         model = devc->model_config;
 187
 188         if (!cg)
 189                 return CG_NONE;
 190
 191         for (i = 0; i < model->analog_channels; i++)
 192                 if (cg == devc->analog_groups[i])
 193                         return CG_ANALOG;
 194
 195         for (i = 0; i < model->pods; i++)
 196                 if (cg == devc->digital_groups[i])
 197                         return CG_DIGITAL;
 198
 199         sr_err("Invalid channel group specified.");
 200         return CG_INVALID;
 201 }
 202
 203 static int config_get(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
 204                 const struct sr_channel_group *cg)
 205 {
 206         int ret, cg_type;
 207         unsigned int i;
 208         struct dev_context *devc;
 209         const struct scope_config *model;
 210         struct scope_state *state;
 211
 212         if (!sdi || !(devc = sdi->priv))
 213                 return SR_ERR_ARG;
 214
 215         if ((cg_type = check_channel_group(devc, cg)) == CG_INVALID)
 216                 return SR_ERR;
 217
 218         model = devc->model_config;
 219         state = devc->model_state;
 220
 221         switch (key) {
 222         case SR_CONF_NUM_HDIV:
 223                 *data = g_variant_new_int32(model->num_xdivs);
 224                 ret = SR_OK;
 225                 break;
 226         case SR_CONF_TIMEBASE:
 227                 *data = g_variant_new("(tt)",
 228                                 dlm_timebases[state->timebase][0],
 229                                 dlm_timebases[state->timebase][1]);
 230                 ret = SR_OK;
 231                 break;
 232         case SR_CONF_NUM_VDIV:
 233                 if (cg_type == CG_NONE) {
 234                         sr_err("No channel group specified.");
 235                         return SR_ERR_CHANNEL_GROUP;
 236                 } else if (cg_type == CG_ANALOG) {
 237                                 *data = g_variant_new_int32(model->num_ydivs);
 238                                 ret = SR_OK;
 239                                 break;
 240                 } else {
 241                         ret = SR_ERR_NA;
 242                 }
 243                 break;
 244         case SR_CONF_VDIV:
 245                 ret = SR_ERR_NA;
 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                         break;
 251
 252                 for (i = 0; i < model->analog_channels; i++) {
 253                         if (cg != devc->analog_groups[i])
 254                                 continue;
 255                         *data = g_variant_new("(tt)",
 256                                         dlm_vdivs[state->analog_states[i].vdiv][0],
 257                                         dlm_vdivs[state->analog_states[i].vdiv][1]);
 258                         ret = SR_OK;
 259                         break;
 260                 }
 261                 break;
 262         case SR_CONF_TRIGGER_SOURCE:
 263                 *data = g_variant_new_string((*model->trigger_sources)[state->trigger_source]);
 264                 ret = SR_OK;
 265                 break;
 266         case SR_CONF_TRIGGER_SLOPE:
 267                 *data = g_variant_new_string(dlm_trigger_slopes[state->trigger_slope]);
 268                 ret = SR_OK;
 269                 break;
 270         case SR_CONF_HORIZ_TRIGGERPOS:
 271                 *data = g_variant_new_double(state->horiz_triggerpos);
 272                 ret = SR_OK;
 273                 break;
 274         case SR_CONF_COUPLING:
 275                 ret = SR_ERR_NA;
 276                 if (cg_type == CG_NONE) {
 277                         sr_err("No channel group specified.");
 278                         return SR_ERR_CHANNEL_GROUP;
 279                 } else if (cg_type != CG_ANALOG)
 280                         break;
 281
 282                 for (i = 0; i < model->analog_channels; i++) {
 283                         if (cg != devc->analog_groups[i])
 284                                 continue;
 285                         *data = g_variant_new_string((*model->coupling_options)[state->analog_states[i].coupling]);
 286                         ret = SR_OK;
 287                         break;
 288                 }
 289                 break;
 290         case SR_CONF_SAMPLERATE:
 291                 *data = g_variant_new_uint64(state->sample_rate);
 292                 ret = SR_OK;
 293                 break;
 294         default:
 295                 ret = SR_ERR_NA;
 296         }
 297
 298         return ret;
 299 }
 300
 301 static GVariant *build_tuples(const uint64_t (*array)[][2], unsigned int n)
 302 {
 303         unsigned int i;
 304         GVariant *rational[2];
 305         GVariantBuilder gvb;
 306
 307         g_variant_builder_init(&gvb, G_VARIANT_TYPE_ARRAY);
 308
 309         for (i = 0; i < n; i++) {
 310                 rational[0] = g_variant_new_uint64((*array)[i][0]);
 311                 rational[1] = g_variant_new_uint64((*array)[i][1]);
 312
 313                 /* FIXME: Valgrind reports a memory leak here. */
 314                 g_variant_builder_add_value(&gvb, g_variant_new_tuple(rational, 2));
 315         }
 316
 317         return g_variant_builder_end(&gvb);
 318 }
 319
 320 static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sdi,
 321                 const struct sr_channel_group *cg)
 322 {
 323         int ret, cg_type;
 324         unsigned int i, j;
 325         char float_str[30];
 326         struct dev_context *devc;
 327         const struct scope_config *model;
 328         struct scope_state *state;
 329         const char *tmp;
 330         uint64_t p, q;
 331         double tmp_d;
 332         gboolean update_sample_rate;
 333
 334         if (!sdi || !(devc = sdi->priv))
 335                 return SR_ERR_ARG;
 336
 337         if ((cg_type = check_channel_group(devc, cg)) == CG_INVALID)
 338                 return SR_ERR;
 339
 340         model = devc->model_config;
 341         state = devc->model_state;
 342         update_sample_rate = FALSE;
 343
 344         ret = SR_ERR_NA;
 345
 346         switch (key) {
 347         case SR_CONF_LIMIT_FRAMES:
 348                 devc->frame_limit = g_variant_get_uint64(data);
 349                 ret = SR_OK;
 350                 break;
 351         case SR_CONF_TRIGGER_SOURCE:
 352                 tmp = g_variant_get_string(data, NULL);
 353                 for (i = 0; (*model->trigger_sources)[i]; i++) {
 354                         if (g_strcmp0(tmp, (*model->trigger_sources)[i]) != 0)
 355                                 continue;
 356                         state->trigger_source = i;
 357                         /* TODO: A and B trigger support possible? */
 358                         ret = dlm_trigger_source_set(sdi->conn, (*model->trigger_sources)[i]);
 359                         break;
 360                 }
 361                 break;
 362         case SR_CONF_VDIV:
 363                 if (cg_type == CG_NONE) {
 364                         sr_err("No channel group specified.");
 365                         return SR_ERR_CHANNEL_GROUP;
 366                 }
 367
 368                 g_variant_get(data, "(tt)", &p, &q);
 369
 370                 for (i = 0; i < ARRAY_SIZE(dlm_vdivs); i++) {
 371                         if (p != dlm_vdivs[i][0] ||
 372                                         q != dlm_vdivs[i][1])
 373                                 continue;
 374                         for (j = 1; j <= model->analog_channels; j++) {
 375                                 if (cg != devc->analog_groups[j - 1])
 376                                         continue;
 377                                 state->analog_states[j - 1].vdiv = i;
 378                                 g_ascii_formatd(float_str, sizeof(float_str),
 379                                                 "%E", (float) p / q);
 380                                 if (dlm_analog_chan_vdiv_set(sdi->conn, j, float_str) != SR_OK ||
 381                                                 sr_scpi_get_opc(sdi->conn) != SR_OK)
 382                                         return SR_ERR;
 383
 384                                 break;
 385                         }
 386
 387                         ret = SR_OK;
 388                         break;
 389                 }
 390                 break;
 391         case SR_CONF_TIMEBASE:
 392                 g_variant_get(data, "(tt)", &p, &q);
 393
 394                 for (i = 0; i < ARRAY_SIZE(dlm_timebases); i++) {
 395                         if (p != dlm_timebases[i][0] ||
 396                                         q != dlm_timebases[i][1])
 397                                 continue;
 398                         state->timebase = i;
 399                         g_ascii_formatd(float_str, sizeof(float_str),
 400                                         "%E", (float) p / q);
 401                         ret = dlm_timebase_set(sdi->conn, float_str);
 402                         update_sample_rate = TRUE;
 403                         break;
 404                 }
 405                 break;
 406         case SR_CONF_HORIZ_TRIGGERPOS:
 407                 tmp_d = g_variant_get_double(data);
 408
 409                 /* TODO: Check if the calculation makes sense for the DLM. */
 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) dlm_timebases[state->timebase][0] /
 416                                 dlm_timebases[state->timebase][1])
 417                                 * model->num_xdivs;
 418
 419                 g_ascii_formatd(float_str, sizeof(float_str), "%E", tmp_d);
 420                 ret = dlm_horiz_trigger_pos_set(sdi->conn, float_str);
 421                 break;
 422         case SR_CONF_TRIGGER_SLOPE:
 423                 tmp = g_variant_get_string(data, NULL);
 424
 425                 if (!tmp || !(tmp[0] == 'f' || tmp[0] == 'r'))
 426                         return SR_ERR_ARG;
 427
 428                 /* Note: See dlm_trigger_slopes[] in protocol.c. */
 429                 state->trigger_slope = (tmp[0] == 'r') ?
 430                                 SLOPE_POSITIVE : SLOPE_NEGATIVE;
 431
 432                 ret = dlm_trigger_slope_set(sdi->conn, state->trigger_slope);
 433                 break;
 434         case SR_CONF_COUPLING:
 435                 if (cg_type == CG_NONE) {
 436                         sr_err("No channel group specified.");
 437                         return SR_ERR_CHANNEL_GROUP;
 438                 }
 439
 440                 tmp = g_variant_get_string(data, NULL);
 441
 442                 for (i = 0; (*model->coupling_options)[i]; i++) {
 443                         if (strcmp(tmp, (*model->coupling_options)[i]) != 0)
 444                                 continue;
 445                         for (j = 1; j <= model->analog_channels; j++) {
 446                                 if (cg != devc->analog_groups[j - 1])
 447                                         continue;
 448                                 state->analog_states[j-1].coupling = i;
 449
 450                                 if (dlm_analog_chan_coupl_set(sdi->conn, j, tmp) != SR_OK ||
 451                                                 sr_scpi_get_opc(sdi->conn) != SR_OK)
 452                                         return SR_ERR;
 453                                 break;
 454                         }
 455
 456                         ret = SR_OK;
 457                         break;
 458                 }
 459                 break;
 460         default:
 461                 ret = SR_ERR_NA;
 462                 break;
 463         }
 464
 465         if (ret == SR_OK)
 466                 ret = sr_scpi_get_opc(sdi->conn);
 467
 468         if (ret == SR_OK && update_sample_rate)
 469                 ret = dlm_sample_rate_query(sdi);
 470
 471         return ret;
 472 }
 473
 474 static int config_channel_set(const struct sr_dev_inst *sdi,
 475                         struct sr_channel *ch, unsigned int changes)
 476 {
 477         /* Currently we only handle SR_CHANNEL_SET_ENABLED. */
 478         if (changes != SR_CHANNEL_SET_ENABLED)
 479                 return SR_ERR_NA;
 480
 481         return dlm_channel_state_set(sdi, ch->index, ch->enabled);
 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         /* SR_CONF_SCAN_OPTIONS is always valid, regardless of sdi or probe group. */
 492         if (key == SR_CONF_SCAN_OPTIONS) {
 493                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 494                                 dlm_scanopts, ARRAY_SIZE(dlm_scanopts), sizeof(uint32_t));
 495                 return SR_OK;
 496         }
 497
 498         /* If sdi is NULL, nothing except SR_CONF_DEVICE_OPTIONS can be provided. */
 499         if (key == SR_CONF_DEVICE_OPTIONS && !sdi) {
 500                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 501                                 dlm_drvopts, ARRAY_SIZE(dlm_drvopts), sizeof(uint32_t));
 502                 return SR_OK;
 503         }
 504
 505         if (!sdi)
 506                 return SR_ERR_ARG;
 507
 508         devc = sdi->priv;
 509         model = devc->model_config;
 510
 511         /*
 512          * If cg is NULL, only the SR_CONF_DEVICE_OPTIONS that are not
 513          * specific to a probe group must be returned.
 514          */
 515         if (!cg) {
 516                 switch (key) {
 517                 case SR_CONF_DEVICE_OPTIONS:
 518                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 519                                         dlm_devopts, ARRAY_SIZE(dlm_devopts), sizeof(uint32_t));
 520                         return SR_OK;
 521                 case SR_CONF_TIMEBASE:
 522                         *data = build_tuples(&dlm_timebases, ARRAY_SIZE(dlm_timebases));
 523                         return SR_OK;
 524                 case SR_CONF_TRIGGER_SOURCE:
 525                         if (!model)
 526                                 return SR_ERR_ARG;
 527                         *data = g_variant_new_strv(*model->trigger_sources,
 528                                         g_strv_length((char **)*model->trigger_sources));
 529                         return SR_OK;
 530                 case SR_CONF_TRIGGER_SLOPE:
 531                         *data = g_variant_new_strv(dlm_trigger_slopes,
 532                                         g_strv_length((char **)dlm_trigger_slopes));
 533                         return SR_OK;
 534                 case SR_CONF_NUM_HDIV:
 535                         *data = g_variant_new_uint32(model->num_xdivs);
 536                         return SR_OK;
 537                 default:
 538                         return SR_ERR_NA;
 539                 }
 540         }
 541
 542         if ((cg_type = check_channel_group(devc, cg)) == CG_INVALID)
 543                 return SR_ERR;
 544
 545         switch (key) {
 546         case SR_CONF_DEVICE_OPTIONS:
 547                 if (cg_type == CG_ANALOG) {
 548                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 549                                 dlm_analog_devopts, ARRAY_SIZE(dlm_analog_devopts), sizeof(uint32_t));
 550                 } else if (cg_type == CG_DIGITAL) {
 551                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 552                                 dlm_digital_devopts, ARRAY_SIZE(dlm_digital_devopts), sizeof(uint32_t));
 553                 } else {
 554                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 555                                 NULL, 0, sizeof(uint32_t));
 556                 }
 557                 break;
 558         case SR_CONF_COUPLING:
 559                 if (cg_type == CG_NONE)
 560                         return SR_ERR_CHANNEL_GROUP;
 561                 *data = g_variant_new_strv(*model->coupling_options,
 562                                 g_strv_length((char **)*model->coupling_options));
 563                 break;
 564         case SR_CONF_VDIV:
 565                 if (cg_type == CG_NONE)
 566                         return SR_ERR_CHANNEL_GROUP;
 567                 *data = build_tuples(&dlm_vdivs, ARRAY_SIZE(dlm_vdivs));
 568                 break;
 569         default:
 570                 return SR_ERR_NA;
 571         }
 572
 573         return SR_OK;
 574 }
 575
 576 static int dlm_check_channels(GSList *channels)
 577 {
 578         GSList *l;
 579         struct sr_channel *ch;
 580         gboolean enabled_pod1, enabled_chan4;
 581
 582         enabled_pod1 = enabled_chan4 = FALSE;
 583
 584         /* Note: On the DLM2000, CH4 and Logic are shared. */
 585         /* TODO Handle non-DLM2000 models. */
 586         for (l = channels; l; l = l->next) {
 587                 ch = l->data;
 588                 switch (ch->type) {
 589                 case SR_CHANNEL_ANALOG:
 590                         if (ch->index == 3)
 591                                 enabled_chan4 = TRUE;
 592                         break;
 593                 case SR_CHANNEL_LOGIC:
 594                         enabled_pod1 = TRUE;
 595                         break;
 596                 default:
 597                         return SR_ERR;
 598                 }
 599         }
 600
 601         if (enabled_pod1 && enabled_chan4)
 602                 return SR_ERR;
 603
 604         return SR_OK;
 605 }
 606
 607 static int dev_acquisition_start(const struct sr_dev_inst *sdi)
 608 {
 609         GSList *l;
 610         gboolean digital_added;
 611         struct sr_channel *ch;
 612         struct dev_context *devc;
 613         struct sr_scpi_dev_inst *scpi;
 614
 615         if (sdi->status != SR_ST_ACTIVE)
 616                 return SR_ERR_DEV_CLOSED;
 617
 618         scpi = sdi->conn;
 619         devc = sdi->priv;
 620         digital_added = FALSE;
 621
 622         g_slist_free(devc->enabled_channels);
 623         devc->enabled_channels = NULL;
 624
 625         for (l = sdi->channels; l; l = l->next) {
 626                 ch = l->data;
 627                 if (!ch->enabled)
 628                         continue;
 629                 /* Only add a single digital channel. */
 630                 if (ch->type != SR_CHANNEL_LOGIC || !digital_added) {
 631                         devc->enabled_channels = g_slist_append(
 632                                 devc->enabled_channels, ch);
 633                         if (ch->type == SR_CHANNEL_LOGIC)
 634                                 digital_added = TRUE;
 635                 }
 636         }
 637
 638         if (!devc->enabled_channels)
 639                 return SR_ERR;
 640
 641         if (dlm_check_channels(devc->enabled_channels) != SR_OK) {
 642                 sr_err("Invalid channel configuration specified!");
 643                 return SR_ERR_NA;
 644         }
 645
 646         /* Request data for the first enabled channel. */
 647         devc->current_channel = devc->enabled_channels;
 648         dlm_channel_data_request(sdi);
 649
 650         /* Call our callback when data comes in or after 5ms. */
 651         sr_scpi_source_add(sdi->session, scpi, G_IO_IN, 5,
 652                         dlm_data_receive, (void *)sdi);
 653
 654         return SR_OK;
 655 }
 656
 657 static int dev_acquisition_stop(struct sr_dev_inst *sdi)
 658 {
 659         struct dev_context *devc;
 660
 661         std_session_send_df_end(sdi, LOG_PREFIX);
 662
 663         if (sdi->status != SR_ST_ACTIVE)
 664                 return SR_ERR_DEV_CLOSED;
 665
 666         devc = sdi->priv;
 667
 668         devc->num_frames = 0;
 669         g_slist_free(devc->enabled_channels);
 670         devc->enabled_channels = NULL;
 671
 672         sr_scpi_source_remove(sdi->session, sdi->conn);
 673
 674         return SR_OK;
 675 }
 676
 677 SR_PRIV struct sr_dev_driver yokogawa_dlm_driver_info = {
 678         .name = "yokogawa-dlm",
 679         .longname = "Yokogawa DL/DLM",
 680         .api_version = 1,
 681         .init = std_init,
 682         .cleanup = std_cleanup,
 683         .scan = scan,
 684         .dev_list = std_dev_list,
 685         .dev_clear = dev_clear,
 686         .config_get = config_get,
 687         .config_set = config_set,
 688         .config_channel_set = config_channel_set,
 689         .config_list = config_list,
 690         .dev_open = dev_open,
 691         .dev_close = dev_close,
 692         .dev_acquisition_start = dev_acquisition_start,
 693         .dev_acquisition_stop = dev_acquisition_stop,
 694         .context = NULL,
 695 };