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 int init(struct sr_dev_driver *di, struct sr_context *sr_ctx)
  67 {
  68         return std_init(sr_ctx, di, LOG_PREFIX);
  69 }
  70
  71 static struct sr_dev_inst *probe_usbtmc_device(struct sr_scpi_dev_inst *scpi)
  72 {
  73         struct sr_dev_inst *sdi;
  74         struct dev_context *devc;
  75         struct sr_scpi_hw_info *hw_info;
  76         char *model_name;
  77         int model_index;
  78
  79         sdi = NULL;
  80         devc = NULL;
  81         hw_info = NULL;
  82
  83         if (sr_scpi_get_hw_id(scpi, &hw_info) != SR_OK) {
  84                 sr_info("Couldn't get IDN response.");
  85                 goto fail;
  86         }
  87
  88         if (strcmp(hw_info->manufacturer, MANUFACTURER_ID) != 0)
  89                 goto fail;
  90
  91         if (dlm_model_get(hw_info->model, &model_name, &model_index) != SR_OK)
  92                 goto fail;
  93
  94         sdi = g_malloc0(sizeof(struct sr_dev_inst));
  95         sdi->status = SR_ST_ACTIVE;
  96         sdi->vendor = g_strdup(MANUFACTURER_NAME);
  97         sdi->model = g_strdup(model_name);
  98         sdi->version = g_strdup(hw_info->firmware_version);
  99
 100         sdi->serial_num = g_strdup(hw_info->serial_number);
 101
 102         sr_scpi_hw_info_free(hw_info);
 103         hw_info = NULL;
 104
 105         devc = g_malloc0(sizeof(struct dev_context));
 106
 107         sdi->driver = &yokogawa_dlm_driver_info;
 108         sdi->priv = devc;
 109         sdi->inst_type = SR_INST_SCPI;
 110         sdi->conn = scpi;
 111
 112         if (dlm_device_init(sdi, model_index) != SR_OK)
 113                 goto fail;
 114
 115         sr_scpi_close(sdi->conn);
 116
 117         sdi->status = SR_ST_INACTIVE;
 118         return sdi;
 119
 120 fail:
 121         if (hw_info)
 122                 sr_scpi_hw_info_free(hw_info);
 123         if (sdi)
 124                 sr_dev_inst_free(sdi);
 125         g_free(devc);
 126
 127         return NULL;
 128 }
 129
 130 static GSList *scan(struct sr_dev_driver *di, GSList *options)
 131 {
 132         return sr_scpi_scan(di->context, options, probe_usbtmc_device);
 133 }
 134
 135 static GSList *dev_list(const struct sr_dev_driver *di)
 136 {
 137         return ((struct drv_context *)(di->context))->instances;
 138 }
 139
 140 static void clear_helper(void *priv)
 141 {
 142         struct dev_context *devc;
 143
 144         devc = priv;
 145
 146         dlm_scope_state_destroy(devc->model_state);
 147
 148         g_free(devc->analog_groups);
 149         g_free(devc->digital_groups);
 150         g_free(devc);
 151 }
 152
 153 static int dev_clear(const struct sr_dev_driver *di)
 154 {
 155         return std_dev_clear(di, clear_helper);
 156 }
 157
 158 static int dev_open(struct sr_dev_inst *sdi)
 159 {
 160         if (sdi->status != SR_ST_ACTIVE && sr_scpi_open(sdi->conn) != SR_OK)
 161                 return SR_ERR;
 162
 163         if (dlm_scope_state_query(sdi) != SR_OK)
 164                 return SR_ERR;
 165
 166         sdi->status = SR_ST_ACTIVE;
 167
 168         return SR_OK;
 169 }
 170
 171 static int dev_close(struct sr_dev_inst *sdi)
 172 {
 173         if (sdi->status == SR_ST_INACTIVE)
 174                 return SR_OK;
 175
 176         sr_scpi_close(sdi->conn);
 177
 178         sdi->status = SR_ST_INACTIVE;
 179
 180         return SR_OK;
 181 }
 182
 183 static int cleanup(const struct sr_dev_driver *di)
 184 {
 185         dev_clear(di);
 186
 187         return SR_OK;
 188 }
 189
 190 /**
 191  * Check which category a given channel group belongs to.
 192  *
 193  * @param devc Our internal device context.
 194  * @param cg The channel group to check.
 195  *
 196  * @retval CG_NONE cg is NULL
 197  * @retval CG_ANALOG cg is an analog group
 198  * @retval CG_DIGITAL cg is a digital group
 199  * @retval CG_INVALID cg is something else
 200  */
 201 static int check_channel_group(struct dev_context *devc,
 202                         const struct sr_channel_group *cg)
 203 {
 204         unsigned int i;
 205         const struct scope_config *model;
 206
 207         model = devc->model_config;
 208
 209         if (!cg)
 210                 return CG_NONE;
 211
 212         for (i = 0; i < model->analog_channels; i++)
 213                 if (cg == devc->analog_groups[i])
 214                         return CG_ANALOG;
 215
 216         for (i = 0; i < model->pods; i++)
 217                 if (cg == devc->digital_groups[i])
 218                         return CG_DIGITAL;
 219
 220         sr_err("Invalid channel group specified.");
 221         return CG_INVALID;
 222 }
 223
 224 static int config_get(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
 225                 const struct sr_channel_group *cg)
 226 {
 227         int ret, cg_type;
 228         unsigned int i;
 229         struct dev_context *devc;
 230         const struct scope_config *model;
 231         struct scope_state *state;
 232
 233         if (!sdi || !(devc = sdi->priv))
 234                 return SR_ERR_ARG;
 235
 236         if ((cg_type = check_channel_group(devc, cg)) == CG_INVALID)
 237                 return SR_ERR;
 238
 239         model = devc->model_config;
 240         state = devc->model_state;
 241
 242         switch (key) {
 243         case SR_CONF_NUM_HDIV:
 244                 *data = g_variant_new_int32(model->num_xdivs);
 245                 ret = SR_OK;
 246                 break;
 247         case SR_CONF_TIMEBASE:
 248                 *data = g_variant_new("(tt)",
 249                                 dlm_timebases[state->timebase][0],
 250                                 dlm_timebases[state->timebase][1]);
 251                 ret = SR_OK;
 252                 break;
 253         case SR_CONF_NUM_VDIV:
 254                 if (cg_type == CG_NONE) {
 255                         sr_err("No channel group specified.");
 256                         return SR_ERR_CHANNEL_GROUP;
 257                 } else if (cg_type == CG_ANALOG) {
 258                                 *data = g_variant_new_int32(model->num_ydivs);
 259                                 ret = SR_OK;
 260                                 break;
 261                 } else {
 262                         ret = SR_ERR_NA;
 263                 }
 264                 break;
 265         case SR_CONF_VDIV:
 266                 ret = SR_ERR_NA;
 267                 if (cg_type == CG_NONE) {
 268                         sr_err("No channel group specified.");
 269                         return SR_ERR_CHANNEL_GROUP;
 270                 } else if (cg_type != CG_ANALOG)
 271                         break;
 272
 273                 for (i = 0; i < model->analog_channels; i++) {
 274                         if (cg != devc->analog_groups[i])
 275                                 continue;
 276                         *data = g_variant_new("(tt)",
 277                                         dlm_vdivs[state->analog_states[i].vdiv][0],
 278                                         dlm_vdivs[state->analog_states[i].vdiv][1]);
 279                         ret = SR_OK;
 280                         break;
 281                 }
 282                 break;
 283         case SR_CONF_TRIGGER_SOURCE:
 284                 *data = g_variant_new_string((*model->trigger_sources)[state->trigger_source]);
 285                 ret = SR_OK;
 286                 break;
 287         case SR_CONF_TRIGGER_SLOPE:
 288                 *data = g_variant_new_string(dlm_trigger_slopes[state->trigger_slope]);
 289                 ret = SR_OK;
 290                 break;
 291         case SR_CONF_HORIZ_TRIGGERPOS:
 292                 *data = g_variant_new_double(state->horiz_triggerpos);
 293                 ret = SR_OK;
 294                 break;
 295         case SR_CONF_COUPLING:
 296                 ret = SR_ERR_NA;
 297                 if (cg_type == CG_NONE) {
 298                         sr_err("No channel group specified.");
 299                         return SR_ERR_CHANNEL_GROUP;
 300                 } else if (cg_type != CG_ANALOG)
 301                         break;
 302
 303                 for (i = 0; i < model->analog_channels; i++) {
 304                         if (cg != devc->analog_groups[i])
 305                                 continue;
 306                         *data = g_variant_new_string((*model->coupling_options)[state->analog_states[i].coupling]);
 307                         ret = SR_OK;
 308                         break;
 309                 }
 310                 break;
 311         case SR_CONF_SAMPLERATE:
 312                 *data = g_variant_new_uint64(state->sample_rate);
 313                 ret = SR_OK;
 314                 break;
 315         default:
 316                 ret = SR_ERR_NA;
 317         }
 318
 319         return ret;
 320 }
 321
 322 static GVariant *build_tuples(const uint64_t (*array)[][2], unsigned int n)
 323 {
 324         unsigned int i;
 325         GVariant *rational[2];
 326         GVariantBuilder gvb;
 327
 328         g_variant_builder_init(&gvb, G_VARIANT_TYPE_ARRAY);
 329
 330         for (i = 0; i < n; i++) {
 331                 rational[0] = g_variant_new_uint64((*array)[i][0]);
 332                 rational[1] = g_variant_new_uint64((*array)[i][1]);
 333
 334                 /* FIXME: Valgrind reports a memory leak here. */
 335                 g_variant_builder_add_value(&gvb, g_variant_new_tuple(rational, 2));
 336         }
 337
 338         return g_variant_builder_end(&gvb);
 339 }
 340
 341 static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sdi,
 342                 const struct sr_channel_group *cg)
 343 {
 344         int ret, cg_type;
 345         unsigned int i, j;
 346         char float_str[30];
 347         struct dev_context *devc;
 348         const struct scope_config *model;
 349         struct scope_state *state;
 350         const char *tmp;
 351         uint64_t p, q;
 352         double tmp_d;
 353         gboolean update_sample_rate;
 354
 355         if (!sdi || !(devc = sdi->priv))
 356                 return SR_ERR_ARG;
 357
 358         if ((cg_type = check_channel_group(devc, cg)) == CG_INVALID)
 359                 return SR_ERR;
 360
 361         model = devc->model_config;
 362         state = devc->model_state;
 363         update_sample_rate = FALSE;
 364
 365         ret = SR_ERR_NA;
 366
 367         switch (key) {
 368         case SR_CONF_LIMIT_FRAMES:
 369                 devc->frame_limit = g_variant_get_uint64(data);
 370                 ret = SR_OK;
 371                 break;
 372         case SR_CONF_TRIGGER_SOURCE:
 373                 tmp = g_variant_get_string(data, NULL);
 374                 for (i = 0; (*model->trigger_sources)[i]; i++) {
 375                         if (g_strcmp0(tmp, (*model->trigger_sources)[i]) != 0)
 376                                 continue;
 377                         state->trigger_source = i;
 378                         /* TODO: A and B trigger support possible? */
 379                         ret = dlm_trigger_source_set(sdi->conn, (*model->trigger_sources)[i]);
 380                         break;
 381                 }
 382                 break;
 383         case SR_CONF_VDIV:
 384                 if (cg_type == CG_NONE) {
 385                         sr_err("No channel group specified.");
 386                         return SR_ERR_CHANNEL_GROUP;
 387                 }
 388
 389                 g_variant_get(data, "(tt)", &p, &q);
 390
 391                 for (i = 0; i < ARRAY_SIZE(dlm_vdivs); i++) {
 392                         if (p != dlm_vdivs[i][0] ||
 393                                         q != dlm_vdivs[i][1])
 394                                 continue;
 395                         for (j = 1; j <= model->analog_channels; j++) {
 396                                 if (cg != devc->analog_groups[j - 1])
 397                                         continue;
 398                                 state->analog_states[j - 1].vdiv = i;
 399                                 g_ascii_formatd(float_str, sizeof(float_str),
 400                                                 "%E", (float) p / q);
 401                                 if (dlm_analog_chan_vdiv_set(sdi->conn, j, float_str) != SR_OK ||
 402                                                 sr_scpi_get_opc(sdi->conn) != SR_OK)
 403                                         return SR_ERR;
 404
 405                                 break;
 406                         }
 407
 408                         ret = SR_OK;
 409                         break;
 410                 }
 411                 break;
 412         case SR_CONF_TIMEBASE:
 413                 g_variant_get(data, "(tt)", &p, &q);
 414
 415                 for (i = 0; i < ARRAY_SIZE(dlm_timebases); i++) {
 416                         if (p != dlm_timebases[i][0] ||
 417                                         q != dlm_timebases[i][1])
 418                                 continue;
 419                         state->timebase = i;
 420                         g_ascii_formatd(float_str, sizeof(float_str),
 421                                         "%E", (float) p / q);
 422                         ret = dlm_timebase_set(sdi->conn, float_str);
 423                         update_sample_rate = TRUE;
 424                         break;
 425                 }
 426                 break;
 427         case SR_CONF_HORIZ_TRIGGERPOS:
 428                 tmp_d = g_variant_get_double(data);
 429
 430                 /* TODO: Check if the calculation makes sense for the DLM. */
 431                 if (tmp_d < 0.0 || tmp_d > 1.0)
 432                         return SR_ERR;
 433
 434                 state->horiz_triggerpos = tmp_d;
 435                 tmp_d = -(tmp_d - 0.5) *
 436                                 ((double) dlm_timebases[state->timebase][0] /
 437                                 dlm_timebases[state->timebase][1])
 438                                 * model->num_xdivs;
 439
 440                 g_ascii_formatd(float_str, sizeof(float_str), "%E", tmp_d);
 441                 ret = dlm_horiz_trigger_pos_set(sdi->conn, float_str);
 442                 break;
 443         case SR_CONF_TRIGGER_SLOPE:
 444                 tmp = g_variant_get_string(data, NULL);
 445
 446                 if (!tmp || !(tmp[0] == 'f' || tmp[0] == 'r'))
 447                         return SR_ERR_ARG;
 448
 449                 /* Note: See dlm_trigger_slopes[] in protocol.c. */
 450                 state->trigger_slope = (tmp[0] == 'r') ?
 451                                 SLOPE_POSITIVE : SLOPE_NEGATIVE;
 452
 453                 ret = dlm_trigger_slope_set(sdi->conn, state->trigger_slope);
 454                 break;
 455         case SR_CONF_COUPLING:
 456                 if (cg_type == CG_NONE) {
 457                         sr_err("No channel group specified.");
 458                         return SR_ERR_CHANNEL_GROUP;
 459                 }
 460
 461                 tmp = g_variant_get_string(data, NULL);
 462
 463                 for (i = 0; (*model->coupling_options)[i]; i++) {
 464                         if (strcmp(tmp, (*model->coupling_options)[i]) != 0)
 465                                 continue;
 466                         for (j = 1; j <= model->analog_channels; j++) {
 467                                 if (cg != devc->analog_groups[j - 1])
 468                                         continue;
 469                                 state->analog_states[j-1].coupling = i;
 470
 471                                 if (dlm_analog_chan_coupl_set(sdi->conn, j, tmp) != SR_OK ||
 472                                                 sr_scpi_get_opc(sdi->conn) != SR_OK)
 473                                         return SR_ERR;
 474                                 break;
 475                         }
 476
 477                         ret = SR_OK;
 478                         break;
 479                 }
 480                 break;
 481         default:
 482                 ret = SR_ERR_NA;
 483                 break;
 484         }
 485
 486         if (ret == SR_OK)
 487                 ret = sr_scpi_get_opc(sdi->conn);
 488
 489         if (ret == SR_OK && update_sample_rate)
 490                 ret = dlm_sample_rate_query(sdi);
 491
 492         return ret;
 493 }
 494
 495 static int config_channel_set(const struct sr_dev_inst *sdi,
 496                         struct sr_channel *ch, unsigned int changes)
 497 {
 498         /* Currently we only handle SR_CHANNEL_SET_ENABLED. */
 499         if (changes != SR_CHANNEL_SET_ENABLED)
 500                 return SR_ERR_NA;
 501
 502         return dlm_channel_state_set(sdi, ch->index, ch->enabled);
 503 }
 504
 505 static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
 506                 const struct sr_channel_group *cg)
 507 {
 508         int cg_type = CG_NONE;
 509         struct dev_context *devc = NULL;
 510         const struct scope_config *model = NULL;
 511
 512         /* SR_CONF_SCAN_OPTIONS is always valid, regardless of sdi or probe group. */
 513         if (key == SR_CONF_SCAN_OPTIONS) {
 514                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 515                                 dlm_scanopts, ARRAY_SIZE(dlm_scanopts), sizeof(uint32_t));
 516                 return SR_OK;
 517         }
 518
 519         /* If sdi is NULL, nothing except SR_CONF_DEVICE_OPTIONS can be provided. */
 520         if (key == SR_CONF_DEVICE_OPTIONS && !sdi) {
 521                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 522                                 dlm_drvopts, ARRAY_SIZE(dlm_drvopts), sizeof(uint32_t));
 523                 return SR_OK;
 524         }
 525
 526         if (!sdi)
 527                 return SR_ERR_ARG;
 528
 529         devc = sdi->priv;
 530         model = devc->model_config;
 531
 532         /*
 533          * If cg is NULL, only the SR_CONF_DEVICE_OPTIONS that are not
 534          * specific to a probe group must be returned.
 535          */
 536         if (!cg) {
 537                 switch (key) {
 538                 case SR_CONF_DEVICE_OPTIONS:
 539                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 540                                         dlm_devopts, ARRAY_SIZE(dlm_devopts), sizeof(uint32_t));
 541                         return SR_OK;
 542                 case SR_CONF_TIMEBASE:
 543                         *data = build_tuples(&dlm_timebases, ARRAY_SIZE(dlm_timebases));
 544                         return SR_OK;
 545                 case SR_CONF_TRIGGER_SOURCE:
 546                         if (!model)
 547                                 return SR_ERR_ARG;
 548                         *data = g_variant_new_strv(*model->trigger_sources,
 549                                         g_strv_length((char **)*model->trigger_sources));
 550                         return SR_OK;
 551                 case SR_CONF_TRIGGER_SLOPE:
 552                         *data = g_variant_new_strv(dlm_trigger_slopes,
 553                                         g_strv_length((char **)dlm_trigger_slopes));
 554                         return SR_OK;
 555                 case SR_CONF_NUM_HDIV:
 556                         *data = g_variant_new_uint32(model->num_xdivs);
 557                         return SR_OK;
 558                 default:
 559                         return SR_ERR_NA;
 560                 }
 561         }
 562
 563         if ((cg_type = check_channel_group(devc, cg)) == CG_INVALID)
 564                 return SR_ERR;
 565
 566         switch (key) {
 567         case SR_CONF_DEVICE_OPTIONS:
 568                 if (cg_type == CG_ANALOG) {
 569                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 570                                 dlm_analog_devopts, ARRAY_SIZE(dlm_analog_devopts), sizeof(uint32_t));
 571                 } else if (cg_type == CG_DIGITAL) {
 572                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 573                                 dlm_digital_devopts, ARRAY_SIZE(dlm_digital_devopts), sizeof(uint32_t));
 574                 } else {
 575                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 576                                 NULL, 0, sizeof(uint32_t));
 577                 }
 578                 break;
 579         case SR_CONF_COUPLING:
 580                 if (cg_type == CG_NONE)
 581                         return SR_ERR_CHANNEL_GROUP;
 582                 *data = g_variant_new_strv(*model->coupling_options,
 583                                 g_strv_length((char **)*model->coupling_options));
 584                 break;
 585         case SR_CONF_VDIV:
 586                 if (cg_type == CG_NONE)
 587                         return SR_ERR_CHANNEL_GROUP;
 588                 *data = build_tuples(&dlm_vdivs, ARRAY_SIZE(dlm_vdivs));
 589                 break;
 590         default:
 591                 return SR_ERR_NA;
 592         }
 593
 594         return SR_OK;
 595 }
 596
 597 static int dlm_check_channels(GSList *channels)
 598 {
 599         GSList *l;
 600         struct sr_channel *ch;
 601         gboolean enabled_pod1, enabled_chan4;
 602
 603         enabled_pod1 = enabled_chan4 = FALSE;
 604
 605         /* Note: On the DLM2000, CH4 and Logic are shared. */
 606         /* TODO Handle non-DLM2000 models. */
 607         for (l = channels; l; l = l->next) {
 608                 ch = l->data;
 609                 switch (ch->type) {
 610                 case SR_CHANNEL_ANALOG:
 611                         if (ch->index == 3)
 612                                 enabled_chan4 = TRUE;
 613                         break;
 614                 case SR_CHANNEL_LOGIC:
 615                         enabled_pod1 = TRUE;
 616                         break;
 617                 default:
 618                         return SR_ERR;
 619                 }
 620         }
 621
 622         if (enabled_pod1 && enabled_chan4)
 623                 return SR_ERR;
 624
 625         return SR_OK;
 626 }
 627
 628 static int dev_acquisition_start(const struct sr_dev_inst *sdi, void *cb_data)
 629 {
 630         GSList *l;
 631         gboolean digital_added;
 632         struct sr_channel *ch;
 633         struct dev_context *devc;
 634         struct sr_scpi_dev_inst *scpi;
 635
 636         (void)cb_data;
 637
 638         if (sdi->status != SR_ST_ACTIVE)
 639                 return SR_ERR_DEV_CLOSED;
 640
 641         scpi = sdi->conn;
 642         devc = sdi->priv;
 643         digital_added = FALSE;
 644
 645         g_slist_free(devc->enabled_channels);
 646         devc->enabled_channels = NULL;
 647
 648         for (l = sdi->channels; l; l = l->next) {
 649                 ch = l->data;
 650                 if (!ch->enabled)
 651                         continue;
 652                 /* Only add a single digital channel. */
 653                 if (ch->type != SR_CHANNEL_LOGIC || !digital_added) {
 654                         devc->enabled_channels = g_slist_append(
 655                                 devc->enabled_channels, ch);
 656                         if (ch->type == SR_CHANNEL_LOGIC)
 657                                 digital_added = TRUE;
 658                 }
 659         }
 660
 661         if (!devc->enabled_channels)
 662                 return SR_ERR;
 663
 664         if (dlm_check_channels(devc->enabled_channels) != SR_OK) {
 665                 sr_err("Invalid channel configuration specified!");
 666                 return SR_ERR_NA;
 667         }
 668
 669         /* Request data for the first enabled channel. */
 670         devc->current_channel = devc->enabled_channels;
 671         dlm_channel_data_request(sdi);
 672
 673         /* Call our callback when data comes in or after 5ms. */
 674         sr_scpi_source_add(sdi->session, scpi, G_IO_IN, 5,
 675                         dlm_data_receive, (void *)sdi);
 676
 677         return SR_OK;
 678 }
 679
 680 static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
 681 {
 682         struct dev_context *devc;
 683         struct sr_datafeed_packet packet;
 684
 685         (void)cb_data;
 686
 687         packet.type = SR_DF_END;
 688         packet.payload = NULL;
 689         sr_session_send(sdi, &packet);
 690
 691         if (sdi->status != SR_ST_ACTIVE)
 692                 return SR_ERR_DEV_CLOSED;
 693
 694         devc = sdi->priv;
 695
 696         devc->num_frames = 0;
 697         g_slist_free(devc->enabled_channels);
 698         devc->enabled_channels = NULL;
 699
 700         sr_scpi_source_remove(sdi->session, sdi->conn);
 701
 702         return SR_OK;
 703 }
 704
 705 SR_PRIV struct sr_dev_driver yokogawa_dlm_driver_info = {
 706         .name = "yokogawa-dlm",
 707         .longname = "Yokogawa DL/DLM",
 708         .api_version = 1,
 709         .init = init,
 710         .cleanup = cleanup,
 711         .scan = scan,
 712         .dev_list = dev_list,
 713         .dev_clear = dev_clear,
 714         .config_get = config_get,
 715         .config_set = config_set,
 716         .config_channel_set = config_channel_set,
 717         .config_list = config_list,
 718         .dev_open = dev_open,
 719         .dev_close = dev_close,
 720         .dev_acquisition_start = dev_acquisition_start,
 721         .dev_acquisition_stop = dev_acquisition_stop,
 722         .context = NULL,
 723 };