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         if (hw_info)
 113                 sr_scpi_hw_info_free(hw_info);
 114         sr_dev_inst_free(sdi);
 115         g_free(devc);
 116
 117         return NULL;
 118 }
 119
 120 static GSList *scan(struct sr_dev_driver *di, GSList *options)
 121 {
 122         return sr_scpi_scan(di->context, options, probe_usbtmc_device);
 123 }
 124
 125 static void clear_helper(void *priv)
 126 {
 127         struct dev_context *devc;
 128
 129         devc = priv;
 130
 131         dlm_scope_state_destroy(devc->model_state);
 132
 133         g_free(devc->analog_groups);
 134         g_free(devc->digital_groups);
 135         g_free(devc);
 136 }
 137
 138 static int dev_clear(const struct sr_dev_driver *di)
 139 {
 140         return std_dev_clear(di, clear_helper);
 141 }
 142
 143 static int dev_open(struct sr_dev_inst *sdi)
 144 {
 145         if (sdi->status != SR_ST_ACTIVE && sr_scpi_open(sdi->conn) != SR_OK)
 146                 return SR_ERR;
 147
 148         if (dlm_scope_state_query(sdi) != SR_OK)
 149                 return SR_ERR;
 150
 151         sdi->status = SR_ST_ACTIVE;
 152
 153         return SR_OK;
 154 }
 155
 156 static int dev_close(struct sr_dev_inst *sdi)
 157 {
 158         if (sdi->status == SR_ST_INACTIVE)
 159                 return SR_OK;
 160
 161         sr_scpi_close(sdi->conn);
 162
 163         sdi->status = SR_ST_INACTIVE;
 164
 165         return SR_OK;
 166 }
 167
 168 /**
 169  * Check which category a given channel group belongs to.
 170  *
 171  * @param devc Our internal device context.
 172  * @param cg The channel group to check.
 173  *
 174  * @retval CG_NONE cg is NULL
 175  * @retval CG_ANALOG cg is an analog group
 176  * @retval CG_DIGITAL cg is a digital group
 177  * @retval CG_INVALID cg is something else
 178  */
 179 static int check_channel_group(struct dev_context *devc,
 180                         const struct sr_channel_group *cg)
 181 {
 182         unsigned int i;
 183         const struct scope_config *model;
 184
 185         model = devc->model_config;
 186
 187         if (!cg)
 188                 return CG_NONE;
 189
 190         for (i = 0; i < model->analog_channels; i++)
 191                 if (cg == devc->analog_groups[i])
 192                         return CG_ANALOG;
 193
 194         for (i = 0; i < model->pods; i++)
 195                 if (cg == devc->digital_groups[i])
 196                         return CG_DIGITAL;
 197
 198         sr_err("Invalid channel group specified.");
 199         return CG_INVALID;
 200 }
 201
 202 static int config_get(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
 203                 const struct sr_channel_group *cg)
 204 {
 205         int ret, cg_type;
 206         unsigned int i;
 207         struct dev_context *devc;
 208         const struct scope_config *model;
 209         struct scope_state *state;
 210
 211         if (!sdi)
 212                 return SR_ERR_ARG;
 213
 214         devc = sdi->priv;
 215
 216         if ((cg_type = check_channel_group(devc, cg)) == CG_INVALID)
 217                 return SR_ERR;
 218
 219         model = devc->model_config;
 220         state = devc->model_state;
 221
 222         switch (key) {
 223         case SR_CONF_NUM_HDIV:
 224                 *data = g_variant_new_int32(model->num_xdivs);
 225                 ret = SR_OK;
 226                 break;
 227         case SR_CONF_TIMEBASE:
 228                 *data = g_variant_new("(tt)",
 229                                 dlm_timebases[state->timebase][0],
 230                                 dlm_timebases[state->timebase][1]);
 231                 ret = SR_OK;
 232                 break;
 233         case SR_CONF_NUM_VDIV:
 234                 if (cg_type == CG_NONE) {
 235                         sr_err("No channel group specified.");
 236                         return SR_ERR_CHANNEL_GROUP;
 237                 } else if (cg_type == CG_ANALOG) {
 238                                 *data = g_variant_new_int32(model->num_ydivs);
 239                                 ret = SR_OK;
 240                                 break;
 241                 } else {
 242                         ret = SR_ERR_NA;
 243                 }
 244                 break;
 245         case SR_CONF_VDIV:
 246                 ret = SR_ERR_NA;
 247                 if (cg_type == CG_NONE) {
 248                         sr_err("No channel group specified.");
 249                         return SR_ERR_CHANNEL_GROUP;
 250                 } else if (cg_type != CG_ANALOG)
 251                         break;
 252
 253                 for (i = 0; i < model->analog_channels; i++) {
 254                         if (cg != devc->analog_groups[i])
 255                                 continue;
 256                         *data = g_variant_new("(tt)",
 257                                         dlm_vdivs[state->analog_states[i].vdiv][0],
 258                                         dlm_vdivs[state->analog_states[i].vdiv][1]);
 259                         ret = SR_OK;
 260                         break;
 261                 }
 262                 break;
 263         case SR_CONF_TRIGGER_SOURCE:
 264                 *data = g_variant_new_string((*model->trigger_sources)[state->trigger_source]);
 265                 ret = SR_OK;
 266                 break;
 267         case SR_CONF_TRIGGER_SLOPE:
 268                 *data = g_variant_new_string(dlm_trigger_slopes[state->trigger_slope]);
 269                 ret = SR_OK;
 270                 break;
 271         case SR_CONF_HORIZ_TRIGGERPOS:
 272                 *data = g_variant_new_double(state->horiz_triggerpos);
 273                 ret = SR_OK;
 274                 break;
 275         case SR_CONF_COUPLING:
 276                 ret = SR_ERR_NA;
 277                 if (cg_type == CG_NONE) {
 278                         sr_err("No channel group specified.");
 279                         return SR_ERR_CHANNEL_GROUP;
 280                 } else if (cg_type != CG_ANALOG)
 281                         break;
 282
 283                 for (i = 0; i < model->analog_channels; i++) {
 284                         if (cg != devc->analog_groups[i])
 285                                 continue;
 286                         *data = g_variant_new_string((*model->coupling_options)[state->analog_states[i].coupling]);
 287                         ret = SR_OK;
 288                         break;
 289                 }
 290                 break;
 291         case SR_CONF_SAMPLERATE:
 292                 *data = g_variant_new_uint64(state->sample_rate);
 293                 ret = SR_OK;
 294                 break;
 295         default:
 296                 ret = SR_ERR_NA;
 297         }
 298
 299         return ret;
 300 }
 301
 302 static GVariant *build_tuples(const uint64_t (*array)[][2], unsigned int n)
 303 {
 304         unsigned int i;
 305         GVariant *rational[2];
 306         GVariantBuilder gvb;
 307
 308         g_variant_builder_init(&gvb, G_VARIANT_TYPE_ARRAY);
 309
 310         for (i = 0; i < n; i++) {
 311                 rational[0] = g_variant_new_uint64((*array)[i][0]);
 312                 rational[1] = g_variant_new_uint64((*array)[i][1]);
 313
 314                 /* FIXME: Valgrind reports a memory leak here. */
 315                 g_variant_builder_add_value(&gvb, g_variant_new_tuple(rational, 2));
 316         }
 317
 318         return g_variant_builder_end(&gvb);
 319 }
 320
 321 static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sdi,
 322                 const struct sr_channel_group *cg)
 323 {
 324         int ret, cg_type;
 325         unsigned int i, j;
 326         char float_str[30];
 327         struct dev_context *devc;
 328         const struct scope_config *model;
 329         struct scope_state *state;
 330         const char *tmp;
 331         uint64_t p, q;
 332         double tmp_d;
 333         gboolean update_sample_rate;
 334
 335         if (!sdi || !(devc = sdi->priv))
 336                 return SR_ERR_ARG;
 337
 338         if ((cg_type = check_channel_group(devc, cg)) == CG_INVALID)
 339                 return SR_ERR;
 340
 341         model = devc->model_config;
 342         state = devc->model_state;
 343         update_sample_rate = FALSE;
 344
 345         ret = SR_ERR_NA;
 346
 347         switch (key) {
 348         case SR_CONF_LIMIT_FRAMES:
 349                 devc->frame_limit = g_variant_get_uint64(data);
 350                 ret = SR_OK;
 351                 break;
 352         case SR_CONF_TRIGGER_SOURCE:
 353                 tmp = g_variant_get_string(data, NULL);
 354                 for (i = 0; (*model->trigger_sources)[i]; i++) {
 355                         if (g_strcmp0(tmp, (*model->trigger_sources)[i]) != 0)
 356                                 continue;
 357                         state->trigger_source = i;
 358                         /* TODO: A and B trigger support possible? */
 359                         ret = dlm_trigger_source_set(sdi->conn, (*model->trigger_sources)[i]);
 360                         break;
 361                 }
 362                 break;
 363         case SR_CONF_VDIV:
 364                 if (cg_type == CG_NONE) {
 365                         sr_err("No channel group specified.");
 366                         return SR_ERR_CHANNEL_GROUP;
 367                 }
 368
 369                 g_variant_get(data, "(tt)", &p, &q);
 370
 371                 for (i = 0; i < ARRAY_SIZE(dlm_vdivs); i++) {
 372                         if (p != dlm_vdivs[i][0] ||
 373                                         q != dlm_vdivs[i][1])
 374                                 continue;
 375                         for (j = 1; j <= model->analog_channels; j++) {
 376                                 if (cg != devc->analog_groups[j - 1])
 377                                         continue;
 378                                 state->analog_states[j - 1].vdiv = i;
 379                                 g_ascii_formatd(float_str, sizeof(float_str),
 380                                                 "%E", (float) p / q);
 381                                 if (dlm_analog_chan_vdiv_set(sdi->conn, j, float_str) != SR_OK ||
 382                                                 sr_scpi_get_opc(sdi->conn) != SR_OK)
 383                                         return SR_ERR;
 384
 385                                 break;
 386                         }
 387
 388                         ret = SR_OK;
 389                         break;
 390                 }
 391                 break;
 392         case SR_CONF_TIMEBASE:
 393                 g_variant_get(data, "(tt)", &p, &q);
 394
 395                 for (i = 0; i < ARRAY_SIZE(dlm_timebases); i++) {
 396                         if (p != dlm_timebases[i][0] ||
 397                                         q != dlm_timebases[i][1])
 398                                 continue;
 399                         state->timebase = i;
 400                         g_ascii_formatd(float_str, sizeof(float_str),
 401                                         "%E", (float) p / q);
 402                         ret = dlm_timebase_set(sdi->conn, float_str);
 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                 /* TODO: Check if the calculation makes sense for the DLM. */
 411                 if (tmp_d < 0.0 || tmp_d > 1.0)
 412                         return SR_ERR;
 413
 414                 state->horiz_triggerpos = tmp_d;
 415                 tmp_d = -(tmp_d - 0.5) *
 416                                 ((double) dlm_timebases[state->timebase][0] /
 417                                 dlm_timebases[state->timebase][1])
 418                                 * model->num_xdivs;
 419
 420                 g_ascii_formatd(float_str, sizeof(float_str), "%E", tmp_d);
 421                 ret = dlm_horiz_trigger_pos_set(sdi->conn, float_str);
 422                 break;
 423         case SR_CONF_TRIGGER_SLOPE:
 424                 tmp = g_variant_get_string(data, NULL);
 425
 426                 if (!tmp || !(tmp[0] == 'f' || tmp[0] == 'r'))
 427                         return SR_ERR_ARG;
 428
 429                 /* Note: See dlm_trigger_slopes[] in protocol.c. */
 430                 state->trigger_slope = (tmp[0] == 'r') ?
 431                                 SLOPE_POSITIVE : SLOPE_NEGATIVE;
 432
 433                 ret = dlm_trigger_slope_set(sdi->conn, state->trigger_slope);
 434                 break;
 435         case SR_CONF_COUPLING:
 436                 if (cg_type == CG_NONE) {
 437                         sr_err("No channel group specified.");
 438                         return SR_ERR_CHANNEL_GROUP;
 439                 }
 440
 441                 tmp = g_variant_get_string(data, NULL);
 442
 443                 for (i = 0; (*model->coupling_options)[i]; i++) {
 444                         if (strcmp(tmp, (*model->coupling_options)[i]) != 0)
 445                                 continue;
 446                         for (j = 1; j <= model->analog_channels; j++) {
 447                                 if (cg != devc->analog_groups[j - 1])
 448                                         continue;
 449                                 state->analog_states[j-1].coupling = i;
 450
 451                                 if (dlm_analog_chan_coupl_set(sdi->conn, j, tmp) != SR_OK ||
 452                                                 sr_scpi_get_opc(sdi->conn) != SR_OK)
 453                                         return SR_ERR;
 454                                 break;
 455                         }
 456
 457                         ret = SR_OK;
 458                         break;
 459                 }
 460                 break;
 461         default:
 462                 ret = SR_ERR_NA;
 463                 break;
 464         }
 465
 466         if (ret == SR_OK)
 467                 ret = sr_scpi_get_opc(sdi->conn);
 468
 469         if (ret == SR_OK && update_sample_rate)
 470                 ret = dlm_sample_rate_query(sdi);
 471
 472         return ret;
 473 }
 474
 475 static int config_channel_set(const struct sr_dev_inst *sdi,
 476                         struct sr_channel *ch, unsigned int changes)
 477 {
 478         /* Currently we only handle SR_CHANNEL_SET_ENABLED. */
 479         if (changes != SR_CHANNEL_SET_ENABLED)
 480                 return SR_ERR_NA;
 481
 482         return dlm_channel_state_set(sdi, ch->index, ch->enabled);
 483 }
 484
 485 static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
 486                 const struct sr_channel_group *cg)
 487 {
 488         int cg_type = CG_NONE;
 489         struct dev_context *devc = NULL;
 490         const struct scope_config *model = NULL;
 491
 492         /* SR_CONF_SCAN_OPTIONS is always valid, regardless of sdi or probe group. */
 493         if (key == SR_CONF_SCAN_OPTIONS) {
 494                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 495                                 dlm_scanopts, ARRAY_SIZE(dlm_scanopts), sizeof(uint32_t));
 496                 return SR_OK;
 497         }
 498
 499         /* If sdi is NULL, nothing except SR_CONF_DEVICE_OPTIONS can be provided. */
 500         if (key == SR_CONF_DEVICE_OPTIONS && !sdi) {
 501                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 502                                 dlm_drvopts, ARRAY_SIZE(dlm_drvopts), sizeof(uint32_t));
 503                 return SR_OK;
 504         }
 505
 506         if (!sdi)
 507                 return SR_ERR_ARG;
 508
 509         devc = sdi->priv;
 510         model = devc->model_config;
 511
 512         /*
 513          * If cg is NULL, only the SR_CONF_DEVICE_OPTIONS that are not
 514          * specific to a probe group must be returned.
 515          */
 516         if (!cg) {
 517                 switch (key) {
 518                 case SR_CONF_DEVICE_OPTIONS:
 519                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 520                                         dlm_devopts, ARRAY_SIZE(dlm_devopts), sizeof(uint32_t));
 521                         return SR_OK;
 522                 case SR_CONF_TIMEBASE:
 523                         *data = build_tuples(&dlm_timebases, ARRAY_SIZE(dlm_timebases));
 524                         return SR_OK;
 525                 case SR_CONF_TRIGGER_SOURCE:
 526                         if (!model)
 527                                 return SR_ERR_ARG;
 528                         *data = g_variant_new_strv(*model->trigger_sources,
 529                                         g_strv_length((char **)*model->trigger_sources));
 530                         return SR_OK;
 531                 case SR_CONF_TRIGGER_SLOPE:
 532                         *data = g_variant_new_strv(dlm_trigger_slopes,
 533                                         g_strv_length((char **)dlm_trigger_slopes));
 534                         return SR_OK;
 535                 case SR_CONF_NUM_HDIV:
 536                         *data = g_variant_new_uint32(model->num_xdivs);
 537                         return SR_OK;
 538                 default:
 539                         return SR_ERR_NA;
 540                 }
 541         }
 542
 543         if ((cg_type = check_channel_group(devc, cg)) == CG_INVALID)
 544                 return SR_ERR;
 545
 546         switch (key) {
 547         case SR_CONF_DEVICE_OPTIONS:
 548                 if (cg_type == CG_ANALOG) {
 549                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 550                                 dlm_analog_devopts, ARRAY_SIZE(dlm_analog_devopts), sizeof(uint32_t));
 551                 } else if (cg_type == CG_DIGITAL) {
 552                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 553                                 dlm_digital_devopts, ARRAY_SIZE(dlm_digital_devopts), sizeof(uint32_t));
 554                 } else {
 555                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 556                                 NULL, 0, sizeof(uint32_t));
 557                 }
 558                 break;
 559         case SR_CONF_COUPLING:
 560                 if (cg_type == CG_NONE)
 561                         return SR_ERR_CHANNEL_GROUP;
 562                 *data = g_variant_new_strv(*model->coupling_options,
 563                                 g_strv_length((char **)*model->coupling_options));
 564                 break;
 565         case SR_CONF_VDIV:
 566                 if (cg_type == CG_NONE)
 567                         return SR_ERR_CHANNEL_GROUP;
 568                 *data = build_tuples(&dlm_vdivs, ARRAY_SIZE(dlm_vdivs));
 569                 break;
 570         default:
 571                 return SR_ERR_NA;
 572         }
 573
 574         return SR_OK;
 575 }
 576
 577 static int dlm_check_channels(GSList *channels)
 578 {
 579         GSList *l;
 580         struct sr_channel *ch;
 581         gboolean enabled_pod1, enabled_chan4;
 582
 583         enabled_pod1 = enabled_chan4 = FALSE;
 584
 585         /* Note: On the DLM2000, CH4 and Logic are shared. */
 586         /* TODO Handle non-DLM2000 models. */
 587         for (l = channels; l; l = l->next) {
 588                 ch = l->data;
 589                 switch (ch->type) {
 590                 case SR_CHANNEL_ANALOG:
 591                         if (ch->index == 3)
 592                                 enabled_chan4 = TRUE;
 593                         break;
 594                 case SR_CHANNEL_LOGIC:
 595                         enabled_pod1 = TRUE;
 596                         break;
 597                 default:
 598                         return SR_ERR;
 599                 }
 600         }
 601
 602         if (enabled_pod1 && enabled_chan4)
 603                 return SR_ERR;
 604
 605         return SR_OK;
 606 }
 607
 608 static int dev_acquisition_start(const struct sr_dev_inst *sdi)
 609 {
 610         GSList *l;
 611         gboolean digital_added;
 612         struct sr_channel *ch;
 613         struct dev_context *devc;
 614         struct sr_scpi_dev_inst *scpi;
 615
 616         if (sdi->status != SR_ST_ACTIVE)
 617                 return SR_ERR_DEV_CLOSED;
 618
 619         scpi = sdi->conn;
 620         devc = sdi->priv;
 621         digital_added = FALSE;
 622
 623         g_slist_free(devc->enabled_channels);
 624         devc->enabled_channels = NULL;
 625
 626         for (l = sdi->channels; l; l = l->next) {
 627                 ch = l->data;
 628                 if (!ch->enabled)
 629                         continue;
 630                 /* Only add a single digital channel. */
 631                 if (ch->type != SR_CHANNEL_LOGIC || !digital_added) {
 632                         devc->enabled_channels = g_slist_append(
 633                                 devc->enabled_channels, ch);
 634                         if (ch->type == SR_CHANNEL_LOGIC)
 635                                 digital_added = TRUE;
 636                 }
 637         }
 638
 639         if (!devc->enabled_channels)
 640                 return SR_ERR;
 641
 642         if (dlm_check_channels(devc->enabled_channels) != SR_OK) {
 643                 sr_err("Invalid channel configuration specified!");
 644                 return SR_ERR_NA;
 645         }
 646
 647         /* Request data for the first enabled channel. */
 648         devc->current_channel = devc->enabled_channels;
 649         dlm_channel_data_request(sdi);
 650
 651         /* Call our callback when data comes in or after 5ms. */
 652         sr_scpi_source_add(sdi->session, scpi, G_IO_IN, 5,
 653                         dlm_data_receive, (void *)sdi);
 654
 655         return SR_OK;
 656 }
 657
 658 static int dev_acquisition_stop(struct sr_dev_inst *sdi)
 659 {
 660         struct dev_context *devc;
 661
 662         std_session_send_df_end(sdi);
 663
 664         if (sdi->status != SR_ST_ACTIVE)
 665                 return SR_ERR_DEV_CLOSED;
 666
 667         devc = sdi->priv;
 668
 669         devc->num_frames = 0;
 670         g_slist_free(devc->enabled_channels);
 671         devc->enabled_channels = NULL;
 672
 673         sr_scpi_source_remove(sdi->session, sdi->conn);
 674
 675         return SR_OK;
 676 }
 677
 678 static struct sr_dev_driver yokogawa_dlm_driver_info = {
 679         .name = "yokogawa-dlm",
 680         .longname = "Yokogawa DL/DLM",
 681         .api_version = 1,
 682         .init = std_init,
 683         .cleanup = std_cleanup,
 684         .scan = scan,
 685         .dev_list = std_dev_list,
 686         .dev_clear = dev_clear,
 687         .config_get = config_get,
 688         .config_set = config_set,
 689         .config_channel_set = config_channel_set,
 690         .config_list = config_list,
 691         .dev_open = dev_open,
 692         .dev_close = dev_close,
 693         .dev_acquisition_start = dev_acquisition_start,
 694         .dev_acquisition_stop = dev_acquisition_stop,
 695         .context = NULL,
 696 };
 697 SR_REGISTER_DEV_DRIVER(yokogawa_dlm_driver_info);