src/hardware/hameg-hmo/api.c

   1 /*
   2  * This file is part of the libsigrok project.
   3  *
   4  * Copyright (C) 2013 poljar (Damir Jelić) <poljarinho@gmail.com>
   5  *
   6  * This program is free software: you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation, either version 3 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #include <stdlib.h>
  21 #include "protocol.h"
  22
  23 #define SERIALCOMM "115200/8n1/flow=1"
  24
  25 SR_PRIV struct sr_dev_driver hameg_hmo_driver_info;
  26 static struct sr_dev_driver *di = &hameg_hmo_driver_info;
  27
  28 static const char *manufacturers[] = {
  29         "HAMEG",
  30 };
  31
  32 static const uint32_t scanopts[] = {
  33         SR_CONF_CONN,
  34         SR_CONF_SERIALCOMM,
  35 };
  36
  37 enum {
  38         CG_INVALID = -1,
  39         CG_NONE,
  40         CG_ANALOG,
  41         CG_DIGITAL,
  42 };
  43
  44 static int init(struct sr_context *sr_ctx)
  45 {
  46         return std_init(sr_ctx, di, LOG_PREFIX);
  47 }
  48
  49 static int check_manufacturer(const char *manufacturer)
  50 {
  51         unsigned int i;
  52
  53         for (i = 0; i < ARRAY_SIZE(manufacturers); ++i)
  54                 if (!strcmp(manufacturer, manufacturers[i]))
  55                         return SR_OK;
  56
  57         return SR_ERR;
  58 }
  59
  60 static struct sr_dev_inst *hmo_probe_serial_device(struct sr_scpi_dev_inst *scpi)
  61 {
  62         struct sr_dev_inst *sdi;
  63         struct dev_context *devc;
  64         struct sr_scpi_hw_info *hw_info;
  65
  66         sdi = NULL;
  67         devc = NULL;
  68         hw_info = NULL;
  69
  70         if (sr_scpi_get_hw_id(scpi, &hw_info) != SR_OK) {
  71                 sr_info("Couldn't get IDN response.");
  72                 goto fail;
  73         }
  74
  75         if (check_manufacturer(hw_info->manufacturer) != SR_OK)
  76                 goto fail;
  77
  78         if (!(sdi = sr_dev_inst_new(SR_ST_ACTIVE,
  79                                     hw_info->manufacturer, hw_info->model,
  80                                     hw_info->firmware_version))) {
  81                 goto fail;
  82         }
  83
  84         sdi->driver = di;
  85         sdi->inst_type = SR_INST_SCPI;
  86         sdi->conn = scpi;
  87         sdi->serial_num = g_strdup(hw_info->serial_number);
  88
  89         sr_scpi_hw_info_free(hw_info);
  90         hw_info = NULL;
  91
  92         if (!(devc = g_try_malloc0(sizeof(struct dev_context))))
  93                 goto fail;
  94
  95         sdi->priv = devc;
  96
  97         if (hmo_init_device(sdi) != SR_OK)
  98                 goto fail;
  99
 100         sr_scpi_close(sdi->conn);
 101
 102         sdi->status = SR_ST_INACTIVE;
 103
 104         return sdi;
 105
 106 fail:
 107         if (hw_info)
 108                 sr_scpi_hw_info_free(hw_info);
 109         if (sdi)
 110                 sr_dev_inst_free(sdi);
 111         if (devc)
 112                 g_free(devc);
 113
 114         return NULL;
 115 }
 116
 117 static GSList *scan(GSList *options)
 118 {
 119         return sr_scpi_scan(di->priv, options, hmo_probe_serial_device);
 120 }
 121
 122 static GSList *dev_list(void)
 123 {
 124         return ((struct drv_context *)(di->priv))->instances;
 125 }
 126
 127 static void clear_helper(void *priv)
 128 {
 129         struct dev_context *devc;
 130
 131         devc = priv;
 132
 133         hmo_scope_state_free(devc->model_state);
 134
 135         g_free(devc->analog_groups);
 136         g_free(devc->digital_groups);
 137
 138         g_free(devc);
 139 }
 140
 141 static int dev_clear(void)
 142 {
 143         return std_dev_clear(di, clear_helper);
 144 }
 145
 146 static int dev_open(struct sr_dev_inst *sdi)
 147 {
 148         if (sdi->status != SR_ST_ACTIVE && sr_scpi_open(sdi->conn) != SR_OK)
 149                 return SR_ERR;
 150
 151         if (hmo_scope_state_get(sdi) != SR_OK)
 152                 return SR_ERR;
 153
 154         sdi->status = SR_ST_ACTIVE;
 155
 156         return SR_OK;
 157 }
 158
 159 static int dev_close(struct sr_dev_inst *sdi)
 160 {
 161         if (sdi->status == SR_ST_INACTIVE)
 162                 return SR_OK;
 163
 164         sr_scpi_close(sdi->conn);
 165
 166         sdi->status = SR_ST_INACTIVE;
 167
 168         return SR_OK;
 169 }
 170
 171 static int cleanup(void)
 172 {
 173         dev_clear();
 174
 175         return SR_OK;
 176 }
 177
 178 static int check_channel_group(struct dev_context *devc,
 179                              const struct sr_channel_group *cg)
 180 {
 181         unsigned int i;
 182         struct scope_config *model;
 183
 184         model = devc->model_config;
 185
 186         if (!cg)
 187                 return CG_NONE;
 188
 189         for (i = 0; i < model->analog_channels; ++i)
 190                 if (cg == devc->analog_groups[i])
 191                         return CG_ANALOG;
 192
 193         for (i = 0; i < model->digital_pods; ++i)
 194                 if (cg == devc->digital_groups[i])
 195                         return CG_DIGITAL;
 196
 197         sr_err("Invalid channel group specified.");
 198
 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         struct scope_config *model;
 209         struct scope_state *state;
 210
 211         if (!sdi || !(devc = sdi->priv))
 212                 return SR_ERR_ARG;
 213
 214         if ((cg_type = check_channel_group(devc, cg)) == CG_INVALID)
 215                 return SR_ERR;
 216
 217         ret = SR_ERR_NA;
 218         model = devc->model_config;
 219         state = devc->model_state;
 220
 221         switch (key) {
 222         case SR_CONF_NUM_TIMEBASE:
 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)", (*model->timebases)[state->timebase][0],
 228                                       (*model->timebases)[state->timebase][1]);
 229                 ret = SR_OK;
 230                 break;
 231         case SR_CONF_NUM_VDIV:
 232                 if (cg_type == CG_NONE) {
 233                         sr_err("No channel group specified.");
 234                         return SR_ERR_CHANNEL_GROUP;
 235                 } else if (cg_type == CG_ANALOG) {
 236                         for (i = 0; i < model->analog_channels; ++i) {
 237                                 if (cg != devc->analog_groups[i])
 238                                         continue;
 239                                 *data = g_variant_new_int32(model->num_ydivs);
 240                                 ret = SR_OK;
 241                                 break;
 242                         }
 243
 244                 } else {
 245                         ret = SR_ERR_NA;
 246                 }
 247                 break;
 248         case SR_CONF_VDIV:
 249                 if (cg_type == CG_NONE) {
 250                         sr_err("No channel group specified.");
 251                         return SR_ERR_CHANNEL_GROUP;
 252                 } else if (cg_type == CG_ANALOG) {
 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                                                       (*model->vdivs)[state->analog_channels[i].vdiv][0],
 258                                                       (*model->vdivs)[state->analog_channels[i].vdiv][1]);
 259                                 ret = SR_OK;
 260                                 break;
 261                         }
 262
 263                 } else {
 264                         ret = SR_ERR_NA;
 265                 }
 266                 break;
 267         case SR_CONF_TRIGGER_SOURCE:
 268                 *data = g_variant_new_string((*model->trigger_sources)[state->trigger_source]);
 269                 ret = SR_OK;
 270                 break;
 271         case SR_CONF_TRIGGER_SLOPE:
 272                 *data = g_variant_new_string((*model->trigger_slopes)[state->trigger_slope]);
 273                 ret = SR_OK;
 274                 break;
 275         case SR_CONF_HORIZ_TRIGGERPOS:
 276                 *data = g_variant_new_double(state->horiz_triggerpos);
 277                 ret = SR_OK;
 278                 break;
 279         case SR_CONF_COUPLING:
 280                 if (cg_type == CG_NONE) {
 281                         sr_err("No channel group specified.");
 282                         return SR_ERR_CHANNEL_GROUP;
 283                 } else if (cg_type == CG_ANALOG) {
 284                         for (i = 0; i < model->analog_channels; ++i) {
 285                                 if (cg != devc->analog_groups[i])
 286                                         continue;
 287                                 *data = g_variant_new_string((*model->coupling_options)[state->analog_channels[i].coupling]);
 288                                 ret = SR_OK;
 289                                 break;
 290                         }
 291
 292                 } else {
 293                         ret = SR_ERR_NA;
 294                 }
 295                 break;
 296         case SR_CONF_SAMPLERATE:
 297                 *data = g_variant_new_uint64(state->sample_rate);
 298                 ret = SR_OK;
 299                 break;
 300         default:
 301                 ret = SR_ERR_NA;
 302         }
 303
 304         return ret;
 305 }
 306
 307 static GVariant *build_tuples(const uint64_t (*array)[][2], unsigned int n)
 308 {
 309         unsigned int i;
 310         GVariant *rational[2];
 311         GVariantBuilder gvb;
 312
 313         g_variant_builder_init(&gvb, G_VARIANT_TYPE_ARRAY);
 314
 315         for (i = 0; i < n; i++) {
 316                 rational[0] = g_variant_new_uint64((*array)[i][0]);
 317                 rational[1] = g_variant_new_uint64((*array)[i][1]);
 318
 319                 /* FIXME: Valgrind reports a memory leak here. */
 320                 g_variant_builder_add_value(&gvb, g_variant_new_tuple(rational, 2));
 321         }
 322
 323         return g_variant_builder_end(&gvb);
 324 }
 325
 326 static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sdi,
 327                       const struct sr_channel_group *cg)
 328 {
 329         int ret, cg_type;
 330         unsigned int i, j;
 331         char command[MAX_COMMAND_SIZE], float_str[30];
 332         struct dev_context *devc;
 333         struct scope_config *model;
 334         struct scope_state *state;
 335         const char *tmp;
 336         uint64_t p, q;
 337         double tmp_d;
 338         gboolean update_sample_rate;
 339
 340         if (!sdi || !(devc = sdi->priv))
 341                 return SR_ERR_ARG;
 342
 343         if ((cg_type = check_channel_group(devc, cg)) == CG_INVALID)
 344                 return SR_ERR;
 345
 346         model = devc->model_config;
 347         state = devc->model_state;
 348         update_sample_rate = FALSE;
 349
 350         ret = SR_ERR_NA;
 351
 352         switch (key) {
 353         case SR_CONF_LIMIT_FRAMES:
 354                 devc->frame_limit = g_variant_get_uint64(data);
 355                 ret = SR_OK;
 356                 break;
 357         case SR_CONF_TRIGGER_SOURCE:
 358                 tmp = g_variant_get_string(data, NULL);
 359                 for (i = 0; (*model->trigger_sources)[i]; i++) {
 360                         if (g_strcmp0(tmp, (*model->trigger_sources)[i]) != 0)
 361                                 continue;
 362                         state->trigger_source = i;
 363                         g_snprintf(command, sizeof(command),
 364                                    (*model->scpi_dialect)[SCPI_CMD_SET_TRIGGER_SOURCE],
 365                                    (*model->trigger_sources)[i]);
 366
 367                         ret = sr_scpi_send(sdi->conn, command);
 368                         break;
 369                 }
 370                 break;
 371         case SR_CONF_VDIV:
 372                 if (cg_type == CG_NONE) {
 373                         sr_err("No channel group specified.");
 374                         return SR_ERR_CHANNEL_GROUP;
 375                 }
 376
 377                 g_variant_get(data, "(tt)", &p, &q);
 378
 379                 for (i = 0; i < model->num_vdivs; i++) {
 380                         if (p != (*model->vdivs)[i][0] ||
 381                             q != (*model->vdivs)[i][1])
 382                                 continue;
 383                         for (j = 1; j <= model->analog_channels; ++j) {
 384                                 if (cg != devc->analog_groups[j - 1])
 385                                         continue;
 386                                 state->analog_channels[j - 1].vdiv = i;
 387                                 g_ascii_formatd(float_str, sizeof(float_str), "%E", (float) p / q);
 388                                 g_snprintf(command, sizeof(command),
 389                                            (*model->scpi_dialect)[SCPI_CMD_SET_VERTICAL_DIV],
 390                                            j, float_str);
 391
 392                                 if (sr_scpi_send(sdi->conn, command) != SR_OK ||
 393                                     sr_scpi_get_opc(sdi->conn) != SR_OK)
 394                                         return SR_ERR;
 395
 396                                 break;
 397                         }
 398
 399                         ret = SR_OK;
 400                         break;
 401                 }
 402                 break;
 403         case SR_CONF_TIMEBASE:
 404                 g_variant_get(data, "(tt)", &p, &q);
 405
 406                 for (i = 0; i < model->num_timebases; i++) {
 407                         if (p != (*model->timebases)[i][0] ||
 408                             q != (*model->timebases)[i][1])
 409                                 continue;
 410                         state->timebase = i;
 411                         g_ascii_formatd(float_str, sizeof(float_str), "%E", (float) p / q);
 412                         g_snprintf(command, sizeof(command),
 413                                    (*model->scpi_dialect)[SCPI_CMD_SET_TIMEBASE],
 414                                    float_str);
 415
 416                         ret = sr_scpi_send(sdi->conn, command);
 417                         update_sample_rate = TRUE;
 418                         break;
 419                 }
 420                 break;
 421         case SR_CONF_HORIZ_TRIGGERPOS:
 422                 tmp_d = g_variant_get_double(data);
 423
 424                 if (tmp_d < 0.0 || tmp_d > 1.0)
 425                         return SR_ERR;
 426
 427                 state->horiz_triggerpos = tmp_d;
 428                 tmp_d = -(tmp_d - 0.5) *
 429                         ((double) (*model->timebases)[state->timebase][0] /
 430                         (*model->timebases)[state->timebase][1])
 431                          * model->num_xdivs;
 432
 433                 g_ascii_formatd(float_str, sizeof(float_str), "%E", tmp_d);
 434                 g_snprintf(command, sizeof(command),
 435                            (*model->scpi_dialect)[SCPI_CMD_SET_HORIZ_TRIGGERPOS],
 436                            float_str);
 437
 438                 ret = sr_scpi_send(sdi->conn, command);
 439                 break;
 440         case SR_CONF_TRIGGER_SLOPE:
 441                 tmp = g_variant_get_string(data, NULL);
 442
 443                 if (!tmp || !(tmp[0] == 'f' || tmp[0] == 'r'))
 444                         return SR_ERR_ARG;
 445
 446                 state->trigger_slope = (tmp[0] == 'r') ? 0 : 1;
 447
 448                 g_snprintf(command, sizeof(command),
 449                            (*model->scpi_dialect)[SCPI_CMD_SET_TRIGGER_SLOPE],
 450                            (state->trigger_slope == 0) ? "POS" : "NEG");
 451
 452                 ret = sr_scpi_send(sdi->conn, command);
 453                 break;
 454         case SR_CONF_COUPLING:
 455                 if (cg_type == CG_NONE) {
 456                         sr_err("No channel group specified.");
 457                         return SR_ERR_CHANNEL_GROUP;
 458                 }
 459
 460                 tmp = g_variant_get_string(data, NULL);
 461
 462                 for (i = 0; (*model->coupling_options)[i]; i++) {
 463                         if (strcmp(tmp, (*model->coupling_options)[i]) != 0)
 464                                 continue;
 465                         for (j = 1; j <= model->analog_channels; ++j) {
 466                                 if (cg != devc->analog_groups[j - 1])
 467                                         continue;
 468                                 state->analog_channels[j-1].coupling = i;
 469
 470                                 g_snprintf(command, sizeof(command),
 471                                            (*model->scpi_dialect)[SCPI_CMD_SET_COUPLING],
 472                                            j, tmp);
 473
 474                                 if (sr_scpi_send(sdi->conn, command) != SR_OK ||
 475                                     sr_scpi_get_opc(sdi->conn) != SR_OK)
 476                                         return SR_ERR;
 477                                 break;
 478                         }
 479
 480                         ret = SR_OK;
 481                         break;
 482                 }
 483                 break;
 484         default:
 485                 ret = SR_ERR_NA;
 486                 break;
 487         }
 488
 489         if (ret == SR_OK)
 490                 ret = sr_scpi_get_opc(sdi->conn);
 491
 492         if (ret == SR_OK && update_sample_rate)
 493                 ret = hmo_update_sample_rate(sdi);
 494
 495         return ret;
 496 }
 497
 498 static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
 499                        const struct sr_channel_group *cg)
 500 {
 501         int cg_type;
 502         struct dev_context *devc;
 503         struct scope_config *model;
 504
 505         if (!sdi || !(devc = sdi->priv))
 506                 return SR_ERR_ARG;
 507
 508         if ((cg_type = check_channel_group(devc, cg)) == CG_INVALID)
 509                 return SR_ERR;
 510
 511         model = devc->model_config;
 512
 513         switch (key) {
 514         case SR_CONF_SCAN_OPTIONS:
 515                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 516                                 scanopts, ARRAY_SIZE(scanopts), sizeof(uint32_t));
 517                 break;
 518         case SR_CONF_DEVICE_OPTIONS:
 519                 if (cg_type == CG_NONE) {
 520                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 521                                 model->devopts, model->num_devopts,
 522                                 sizeof(uint32_t));
 523                 } else if (cg_type == CG_ANALOG) {
 524                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 525                                 model->analog_devopts, model->num_analog_devopts,
 526                                 sizeof(uint32_t));
 527                 } else {
 528                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 529                                 NULL, 0, sizeof(uint32_t));
 530                 }
 531                 break;
 532         case SR_CONF_COUPLING:
 533                 if (cg_type == CG_NONE)
 534                         return SR_ERR_CHANNEL_GROUP;
 535                 *data = g_variant_new_strv(*model->coupling_options,
 536                            g_strv_length((char **)*model->coupling_options));
 537                 break;
 538         case SR_CONF_TRIGGER_SOURCE:
 539                 *data = g_variant_new_strv(*model->trigger_sources,
 540                            g_strv_length((char **)*model->trigger_sources));
 541                 break;
 542         case SR_CONF_TRIGGER_SLOPE:
 543                 *data = g_variant_new_strv(*model->trigger_slopes,
 544                            g_strv_length((char **)*model->trigger_slopes));
 545                 break;
 546         case SR_CONF_TIMEBASE:
 547                 *data = build_tuples(model->timebases, model->num_timebases);
 548                 break;
 549         case SR_CONF_VDIV:
 550                 if (cg_type == CG_NONE)
 551                         return SR_ERR_CHANNEL_GROUP;
 552                 *data = build_tuples(model->vdivs, model->num_vdivs);
 553                 break;
 554         default:
 555                 return SR_ERR_NA;
 556         }
 557
 558         return SR_OK;
 559 }
 560
 561 SR_PRIV int hmo_request_data(const struct sr_dev_inst *sdi)
 562 {
 563         char command[MAX_COMMAND_SIZE];
 564         struct sr_channel *ch;
 565         struct dev_context *devc;
 566         struct scope_config *model;
 567
 568         devc = sdi->priv;
 569         model = devc->model_config;
 570
 571         ch = devc->current_channel->data;
 572
 573         switch (ch->type) {
 574         case SR_CHANNEL_ANALOG:
 575                 g_snprintf(command, sizeof(command),
 576                            (*model->scpi_dialect)[SCPI_CMD_GET_ANALOG_DATA],
 577                            ch->index + 1);
 578                 break;
 579         case SR_CHANNEL_LOGIC:
 580                 g_snprintf(command, sizeof(command),
 581                            (*model->scpi_dialect)[SCPI_CMD_GET_DIG_DATA],
 582                            ch->index < 8 ? 1 : 2);
 583                 break;
 584         default:
 585                 sr_err("Invalid channel type.");
 586                 break;
 587         }
 588
 589         return sr_scpi_send(sdi->conn, command);
 590 }
 591
 592 static int hmo_check_channels(GSList *channels)
 593 {
 594         GSList *l;
 595         struct sr_channel *ch;
 596         gboolean enabled_pod1, enabled_pod2, enabled_chan3, enabled_chan4;
 597
 598         enabled_pod1 = enabled_pod2 = enabled_chan3 = enabled_chan4 = FALSE;
 599
 600         for (l = channels; l; l = l->next) {
 601                 ch = l->data;
 602                 switch (ch->type) {
 603                 case SR_CHANNEL_ANALOG:
 604                         if (ch->index == 2)
 605                                 enabled_chan3 = TRUE;
 606                         else if (ch->index == 3)
 607                                 enabled_chan4 = TRUE;
 608                         break;
 609                 case SR_CHANNEL_LOGIC:
 610                         if (ch->index < 8)
 611                                 enabled_pod1 = TRUE;
 612                         else
 613                                 enabled_pod2 = TRUE;
 614                         break;
 615                 default:
 616                         return SR_ERR;
 617                 }
 618         }
 619
 620         if ((enabled_pod1 && enabled_chan3) ||
 621             (enabled_pod2 && enabled_chan4))
 622                 return SR_ERR;
 623
 624         return SR_OK;
 625 }
 626
 627 static int hmo_setup_channels(const struct sr_dev_inst *sdi)
 628 {
 629         GSList *l;
 630         unsigned int i;
 631         gboolean *pod_enabled, setup_changed;
 632         char command[MAX_COMMAND_SIZE];
 633         struct scope_state *state;
 634         struct scope_config *model;
 635         struct sr_channel *ch;
 636         struct dev_context *devc;
 637         struct sr_scpi_dev_inst *scpi;
 638
 639         devc = sdi->priv;
 640         scpi = sdi->conn;
 641         state = devc->model_state;
 642         model = devc->model_config;
 643         setup_changed = FALSE;
 644
 645         pod_enabled = g_try_malloc0(sizeof(gboolean) * model->digital_pods);
 646
 647         for (l = sdi->channels; l; l = l->next) {
 648                 ch = l->data;
 649                 switch (ch->type) {
 650                 case SR_CHANNEL_ANALOG:
 651                         if (ch->enabled == state->analog_channels[ch->index].state)
 652                                 break;
 653                         g_snprintf(command, sizeof(command),
 654                                    (*model->scpi_dialect)[SCPI_CMD_SET_ANALOG_CHAN_STATE],
 655                                    ch->index + 1, ch->enabled);
 656
 657                         if (sr_scpi_send(scpi, command) != SR_OK)
 658                                 return SR_ERR;
 659                         state->analog_channels[ch->index].state = ch->enabled;
 660                         setup_changed = TRUE;
 661                         break;
 662                 case SR_CHANNEL_LOGIC:
 663                         /*
 664                          * A digital POD needs to be enabled for every group of
 665                          * 8 channels.
 666                          */
 667                         if (ch->enabled)
 668                                 pod_enabled[ch->index < 8 ? 0 : 1] = TRUE;
 669
 670                         if (ch->enabled == state->digital_channels[ch->index])
 671                                 break;
 672                         g_snprintf(command, sizeof(command),
 673                                    (*model->scpi_dialect)[SCPI_CMD_SET_DIG_CHAN_STATE],
 674                                    ch->index, ch->enabled);
 675
 676                         if (sr_scpi_send(scpi, command) != SR_OK)
 677                                 return SR_ERR;
 678
 679                         state->digital_channels[ch->index] = ch->enabled;
 680                         setup_changed = TRUE;
 681                         break;
 682                 default:
 683                         return SR_ERR;
 684                 }
 685         }
 686
 687         for (i = 1; i <= model->digital_pods; ++i) {
 688                 if (state->digital_pods[i - 1] == pod_enabled[i - 1])
 689                         continue;
 690                 g_snprintf(command, sizeof(command),
 691                            (*model->scpi_dialect)[SCPI_CMD_SET_DIG_POD_STATE],
 692                            i, pod_enabled[i - 1]);
 693                 if (sr_scpi_send(scpi, command) != SR_OK)
 694                         return SR_ERR;
 695                 state->digital_pods[i - 1] = pod_enabled[i - 1];
 696                 setup_changed = TRUE;
 697         }
 698
 699         g_free(pod_enabled);
 700
 701         if (setup_changed && hmo_update_sample_rate(sdi) != SR_OK)
 702                 return SR_ERR;
 703
 704         return SR_OK;
 705 }
 706
 707 static int dev_acquisition_start(const struct sr_dev_inst *sdi, void *cb_data)
 708 {
 709         GSList *l;
 710         gboolean digital_added;
 711         struct sr_channel *ch;
 712         struct dev_context *devc;
 713         struct sr_scpi_dev_inst *scpi;
 714
 715         if (sdi->status != SR_ST_ACTIVE)
 716                 return SR_ERR_DEV_CLOSED;
 717
 718         scpi = sdi->conn;
 719         devc = sdi->priv;
 720         digital_added = FALSE;
 721
 722         g_slist_free(devc->enabled_channels);
 723         devc->enabled_channels = NULL;
 724
 725         for (l = sdi->channels; l; l = l->next) {
 726                 ch = l->data;
 727                 if (!ch->enabled)
 728                         continue;
 729                 /* Only add a single digital channel. */
 730                 if (ch->type != SR_CHANNEL_LOGIC || !digital_added) {
 731                         devc->enabled_channels = g_slist_append(
 732                                         devc->enabled_channels, ch);
 733                         if (ch->type == SR_CHANNEL_LOGIC)
 734                                 digital_added = TRUE;
 735                 }
 736         }
 737
 738         if (!devc->enabled_channels)
 739                 return SR_ERR;
 740
 741         if (hmo_check_channels(devc->enabled_channels) != SR_OK) {
 742                 sr_err("Invalid channel configuration specified!");
 743                 return SR_ERR_NA;
 744         }
 745
 746         if (hmo_setup_channels(sdi) != SR_OK) {
 747                 sr_err("Failed to setup channel configuration!");
 748                 return SR_ERR;
 749         }
 750
 751         sr_scpi_source_add(sdi->session, scpi, G_IO_IN, 50,
 752                         hmo_receive_data, (void *)sdi);
 753
 754         /* Send header packet to the session bus. */
 755         std_session_send_df_header(cb_data, LOG_PREFIX);
 756
 757         devc->current_channel = devc->enabled_channels;
 758
 759         return hmo_request_data(sdi);
 760 }
 761
 762 static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
 763 {
 764         struct dev_context *devc;
 765         struct sr_scpi_dev_inst *scpi;
 766         struct sr_datafeed_packet packet;
 767
 768         (void)cb_data;
 769
 770         packet.type = SR_DF_END;
 771         packet.payload = NULL;
 772         sr_session_send(sdi, &packet);
 773
 774         if (sdi->status != SR_ST_ACTIVE)
 775                 return SR_ERR_DEV_CLOSED;
 776
 777         devc = sdi->priv;
 778
 779         devc->num_frames = 0;
 780         g_slist_free(devc->enabled_channels);
 781         devc->enabled_channels = NULL;
 782         scpi = sdi->conn;
 783         sr_scpi_source_remove(sdi->session, scpi);
 784
 785         return SR_OK;
 786 }
 787
 788 SR_PRIV struct sr_dev_driver hameg_hmo_driver_info = {
 789         .name = "hameg-hmo",
 790         .longname = "Hameg HMO",
 791         .api_version = 1,
 792         .init = init,
 793         .cleanup = cleanup,
 794         .scan = scan,
 795         .dev_list = dev_list,
 796         .dev_clear = dev_clear,
 797         .config_get = config_get,
 798         .config_set = config_set,
 799         .config_list = config_list,
 800         .dev_open = dev_open,
 801         .dev_close = dev_close,
 802         .dev_acquisition_start = dev_acquisition_start,
 803         .dev_acquisition_stop = dev_acquisition_stop,
 804         .priv = NULL,
 805 };