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 drvopts[] = {
  33         SR_CONF_OSCILLOSCOPE,
  34 };
  35
  36 static const uint32_t scanopts[] = {
  37         SR_CONF_CONN,
  38         SR_CONF_SERIALCOMM,
  39 };
  40
  41 enum {
  42         CG_INVALID = -1,
  43         CG_NONE,
  44         CG_ANALOG,
  45         CG_DIGITAL,
  46 };
  47
  48 static int init(struct sr_context *sr_ctx)
  49 {
  50         return std_init(sr_ctx, di, LOG_PREFIX);
  51 }
  52
  53 static int check_manufacturer(const char *manufacturer)
  54 {
  55         unsigned int i;
  56
  57         for (i = 0; i < ARRAY_SIZE(manufacturers); ++i)
  58                 if (!strcmp(manufacturer, manufacturers[i]))
  59                         return SR_OK;
  60
  61         return SR_ERR;
  62 }
  63
  64 static struct sr_dev_inst *hmo_probe_serial_device(struct sr_scpi_dev_inst *scpi)
  65 {
  66         struct sr_dev_inst *sdi;
  67         struct dev_context *devc;
  68         struct sr_scpi_hw_info *hw_info;
  69
  70         sdi = NULL;
  71         devc = NULL;
  72         hw_info = NULL;
  73
  74         if (sr_scpi_get_hw_id(scpi, &hw_info) != SR_OK) {
  75                 sr_info("Couldn't get IDN response.");
  76                 goto fail;
  77         }
  78
  79         if (check_manufacturer(hw_info->manufacturer) != SR_OK)
  80                 goto fail;
  81
  82         sdi = g_malloc0(sizeof(struct sr_dev_inst));
  83         sdi->status = SR_ST_ACTIVE;
  84         sdi->vendor = g_strdup(hw_info->manufacturer);
  85         sdi->model = g_strdup(hw_info->model);
  86         sdi->version = g_strdup(hw_info->firmware_version);
  87         sdi->serial_num = g_strdup(hw_info->serial_number);
  88         sdi->driver = di;
  89         sdi->inst_type = SR_INST_SCPI;
  90         sdi->conn = scpi;
  91
  92         sr_scpi_hw_info_free(hw_info);
  93         hw_info = NULL;
  94
  95         if (!(devc = g_try_malloc0(sizeof(struct dev_context))))
  96                 goto fail;
  97
  98         sdi->priv = devc;
  99
 100         if (hmo_init_device(sdi) != SR_OK)
 101                 goto fail;
 102
 103         sr_scpi_close(sdi->conn);
 104
 105         sdi->status = SR_ST_INACTIVE;
 106
 107         return sdi;
 108
 109 fail:
 110         if (hw_info)
 111                 sr_scpi_hw_info_free(hw_info);
 112         if (sdi)
 113                 sr_dev_inst_free(sdi);
 114         if (devc)
 115                 g_free(devc);
 116
 117         return NULL;
 118 }
 119
 120 static GSList *scan(GSList *options)
 121 {
 122         return sr_scpi_scan(di->priv, options, hmo_probe_serial_device);
 123 }
 124
 125 static GSList *dev_list(void)
 126 {
 127         return ((struct drv_context *)(di->priv))->instances;
 128 }
 129
 130 static void clear_helper(void *priv)
 131 {
 132         struct dev_context *devc;
 133
 134         devc = priv;
 135
 136         hmo_scope_state_free(devc->model_state);
 137
 138         g_free(devc->analog_groups);
 139         g_free(devc->digital_groups);
 140
 141         g_free(devc);
 142 }
 143
 144 static int dev_clear(void)
 145 {
 146         return std_dev_clear(di, clear_helper);
 147 }
 148
 149 static int dev_open(struct sr_dev_inst *sdi)
 150 {
 151         if (sdi->status != SR_ST_ACTIVE && sr_scpi_open(sdi->conn) != SR_OK)
 152                 return SR_ERR;
 153
 154         if (hmo_scope_state_get(sdi) != SR_OK)
 155                 return SR_ERR;
 156
 157         sdi->status = SR_ST_ACTIVE;
 158
 159         return SR_OK;
 160 }
 161
 162 static int dev_close(struct sr_dev_inst *sdi)
 163 {
 164         if (sdi->status == SR_ST_INACTIVE)
 165                 return SR_OK;
 166
 167         sr_scpi_close(sdi->conn);
 168
 169         sdi->status = SR_ST_INACTIVE;
 170
 171         return SR_OK;
 172 }
 173
 174 static int cleanup(void)
 175 {
 176         dev_clear();
 177
 178         return SR_OK;
 179 }
 180
 181 static int check_channel_group(struct dev_context *devc,
 182                              const struct sr_channel_group *cg)
 183 {
 184         unsigned int i;
 185         struct scope_config *model;
 186
 187         model = devc->model_config;
 188
 189         if (!cg)
 190                 return CG_NONE;
 191
 192         for (i = 0; i < model->analog_channels; ++i)
 193                 if (cg == devc->analog_groups[i])
 194                         return CG_ANALOG;
 195
 196         for (i = 0; i < model->digital_pods; ++i)
 197                 if (cg == devc->digital_groups[i])
 198                         return CG_DIGITAL;
 199
 200         sr_err("Invalid channel group specified.");
 201
 202         return CG_INVALID;
 203 }
 204
 205 static int config_get(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
 206                       const struct sr_channel_group *cg)
 207 {
 208         int ret, cg_type;
 209         unsigned int i;
 210         struct dev_context *devc;
 211         struct scope_config *model;
 212         struct scope_state *state;
 213
 214         if (!sdi || !(devc = sdi->priv))
 215                 return SR_ERR_ARG;
 216
 217         if ((cg_type = check_channel_group(devc, cg)) == CG_INVALID)
 218                 return SR_ERR;
 219
 220         ret = SR_ERR_NA;
 221         model = devc->model_config;
 222         state = devc->model_state;
 223
 224         switch (key) {
 225         case SR_CONF_NUM_TIMEBASE:
 226                 *data = g_variant_new_int32(model->num_xdivs);
 227                 ret = SR_OK;
 228                 break;
 229         case SR_CONF_TIMEBASE:
 230                 *data = g_variant_new("(tt)", (*model->timebases)[state->timebase][0],
 231                                       (*model->timebases)[state->timebase][1]);
 232                 ret = SR_OK;
 233                 break;
 234         case SR_CONF_NUM_VDIV:
 235                 if (cg_type == CG_NONE) {
 236                         sr_err("No channel group specified.");
 237                         return SR_ERR_CHANNEL_GROUP;
 238                 } else if (cg_type == CG_ANALOG) {
 239                         for (i = 0; i < model->analog_channels; ++i) {
 240                                 if (cg != devc->analog_groups[i])
 241                                         continue;
 242                                 *data = g_variant_new_int32(model->num_ydivs);
 243                                 ret = SR_OK;
 244                                 break;
 245                         }
 246
 247                 } else {
 248                         ret = SR_ERR_NA;
 249                 }
 250                 break;
 251         case SR_CONF_VDIV:
 252                 if (cg_type == CG_NONE) {
 253                         sr_err("No channel group specified.");
 254                         return SR_ERR_CHANNEL_GROUP;
 255                 } else if (cg_type == CG_ANALOG) {
 256                         for (i = 0; i < model->analog_channels; ++i) {
 257                                 if (cg != devc->analog_groups[i])
 258                                         continue;
 259                                 *data = g_variant_new("(tt)",
 260                                                       (*model->vdivs)[state->analog_channels[i].vdiv][0],
 261                                                       (*model->vdivs)[state->analog_channels[i].vdiv][1]);
 262                                 ret = SR_OK;
 263                                 break;
 264                         }
 265
 266                 } else {
 267                         ret = SR_ERR_NA;
 268                 }
 269                 break;
 270         case SR_CONF_TRIGGER_SOURCE:
 271                 *data = g_variant_new_string((*model->trigger_sources)[state->trigger_source]);
 272                 ret = SR_OK;
 273                 break;
 274         case SR_CONF_TRIGGER_SLOPE:
 275                 *data = g_variant_new_string((*model->trigger_slopes)[state->trigger_slope]);
 276                 ret = SR_OK;
 277                 break;
 278         case SR_CONF_HORIZ_TRIGGERPOS:
 279                 *data = g_variant_new_double(state->horiz_triggerpos);
 280                 ret = SR_OK;
 281                 break;
 282         case SR_CONF_COUPLING:
 283                 if (cg_type == CG_NONE) {
 284                         sr_err("No channel group specified.");
 285                         return SR_ERR_CHANNEL_GROUP;
 286                 } else if (cg_type == CG_ANALOG) {
 287                         for (i = 0; i < model->analog_channels; ++i) {
 288                                 if (cg != devc->analog_groups[i])
 289                                         continue;
 290                                 *data = g_variant_new_string((*model->coupling_options)[state->analog_channels[i].coupling]);
 291                                 ret = SR_OK;
 292                                 break;
 293                         }
 294
 295                 } else {
 296                         ret = SR_ERR_NA;
 297                 }
 298                 break;
 299         case SR_CONF_SAMPLERATE:
 300                 *data = g_variant_new_uint64(state->sample_rate);
 301                 ret = SR_OK;
 302                 break;
 303         default:
 304                 ret = SR_ERR_NA;
 305         }
 306
 307         return ret;
 308 }
 309
 310 static GVariant *build_tuples(const uint64_t (*array)[][2], unsigned int n)
 311 {
 312         unsigned int i;
 313         GVariant *rational[2];
 314         GVariantBuilder gvb;
 315
 316         g_variant_builder_init(&gvb, G_VARIANT_TYPE_ARRAY);
 317
 318         for (i = 0; i < n; i++) {
 319                 rational[0] = g_variant_new_uint64((*array)[i][0]);
 320                 rational[1] = g_variant_new_uint64((*array)[i][1]);
 321
 322                 /* FIXME: Valgrind reports a memory leak here. */
 323                 g_variant_builder_add_value(&gvb, g_variant_new_tuple(rational, 2));
 324         }
 325
 326         return g_variant_builder_end(&gvb);
 327 }
 328
 329 static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sdi,
 330                       const struct sr_channel_group *cg)
 331 {
 332         int ret, cg_type;
 333         unsigned int i, j;
 334         char command[MAX_COMMAND_SIZE], float_str[30];
 335         struct dev_context *devc;
 336         struct scope_config *model;
 337         struct scope_state *state;
 338         const char *tmp;
 339         uint64_t p, q;
 340         double tmp_d;
 341         gboolean update_sample_rate;
 342
 343         if (!sdi || !(devc = sdi->priv))
 344                 return SR_ERR_ARG;
 345
 346         if ((cg_type = check_channel_group(devc, cg)) == CG_INVALID)
 347                 return SR_ERR;
 348
 349         model = devc->model_config;
 350         state = devc->model_state;
 351         update_sample_rate = FALSE;
 352
 353         ret = SR_ERR_NA;
 354
 355         switch (key) {
 356         case SR_CONF_LIMIT_FRAMES:
 357                 devc->frame_limit = g_variant_get_uint64(data);
 358                 ret = SR_OK;
 359                 break;
 360         case SR_CONF_TRIGGER_SOURCE:
 361                 tmp = g_variant_get_string(data, NULL);
 362                 for (i = 0; (*model->trigger_sources)[i]; i++) {
 363                         if (g_strcmp0(tmp, (*model->trigger_sources)[i]) != 0)
 364                                 continue;
 365                         state->trigger_source = i;
 366                         g_snprintf(command, sizeof(command),
 367                                    (*model->scpi_dialect)[SCPI_CMD_SET_TRIGGER_SOURCE],
 368                                    (*model->trigger_sources)[i]);
 369
 370                         ret = sr_scpi_send(sdi->conn, command);
 371                         break;
 372                 }
 373                 break;
 374         case SR_CONF_VDIV:
 375                 if (cg_type == CG_NONE) {
 376                         sr_err("No channel group specified.");
 377                         return SR_ERR_CHANNEL_GROUP;
 378                 }
 379
 380                 g_variant_get(data, "(tt)", &p, &q);
 381
 382                 for (i = 0; i < model->num_vdivs; i++) {
 383                         if (p != (*model->vdivs)[i][0] ||
 384                             q != (*model->vdivs)[i][1])
 385                                 continue;
 386                         for (j = 1; j <= model->analog_channels; ++j) {
 387                                 if (cg != devc->analog_groups[j - 1])
 388                                         continue;
 389                                 state->analog_channels[j - 1].vdiv = i;
 390                                 g_ascii_formatd(float_str, sizeof(float_str), "%E", (float) p / q);
 391                                 g_snprintf(command, sizeof(command),
 392                                            (*model->scpi_dialect)[SCPI_CMD_SET_VERTICAL_DIV],
 393                                            j, float_str);
 394
 395                                 if (sr_scpi_send(sdi->conn, command) != SR_OK ||
 396                                     sr_scpi_get_opc(sdi->conn) != SR_OK)
 397                                         return SR_ERR;
 398
 399                                 break;
 400                         }
 401
 402                         ret = SR_OK;
 403                         break;
 404                 }
 405                 break;
 406         case SR_CONF_TIMEBASE:
 407                 g_variant_get(data, "(tt)", &p, &q);
 408
 409                 for (i = 0; i < model->num_timebases; i++) {
 410                         if (p != (*model->timebases)[i][0] ||
 411                             q != (*model->timebases)[i][1])
 412                                 continue;
 413                         state->timebase = i;
 414                         g_ascii_formatd(float_str, sizeof(float_str), "%E", (float) p / q);
 415                         g_snprintf(command, sizeof(command),
 416                                    (*model->scpi_dialect)[SCPI_CMD_SET_TIMEBASE],
 417                                    float_str);
 418
 419                         ret = sr_scpi_send(sdi->conn, command);
 420                         update_sample_rate = TRUE;
 421                         break;
 422                 }
 423                 break;
 424         case SR_CONF_HORIZ_TRIGGERPOS:
 425                 tmp_d = g_variant_get_double(data);
 426
 427                 if (tmp_d < 0.0 || tmp_d > 1.0)
 428                         return SR_ERR;
 429
 430                 state->horiz_triggerpos = tmp_d;
 431                 tmp_d = -(tmp_d - 0.5) *
 432                         ((double) (*model->timebases)[state->timebase][0] /
 433                         (*model->timebases)[state->timebase][1])
 434                          * model->num_xdivs;
 435
 436                 g_ascii_formatd(float_str, sizeof(float_str), "%E", tmp_d);
 437                 g_snprintf(command, sizeof(command),
 438                            (*model->scpi_dialect)[SCPI_CMD_SET_HORIZ_TRIGGERPOS],
 439                            float_str);
 440
 441                 ret = sr_scpi_send(sdi->conn, command);
 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                 state->trigger_slope = (tmp[0] == 'r') ? 0 : 1;
 450
 451                 g_snprintf(command, sizeof(command),
 452                            (*model->scpi_dialect)[SCPI_CMD_SET_TRIGGER_SLOPE],
 453                            (state->trigger_slope == 0) ? "POS" : "NEG");
 454
 455                 ret = sr_scpi_send(sdi->conn, command);
 456                 break;
 457         case SR_CONF_COUPLING:
 458                 if (cg_type == CG_NONE) {
 459                         sr_err("No channel group specified.");
 460                         return SR_ERR_CHANNEL_GROUP;
 461                 }
 462
 463                 tmp = g_variant_get_string(data, NULL);
 464
 465                 for (i = 0; (*model->coupling_options)[i]; i++) {
 466                         if (strcmp(tmp, (*model->coupling_options)[i]) != 0)
 467                                 continue;
 468                         for (j = 1; j <= model->analog_channels; ++j) {
 469                                 if (cg != devc->analog_groups[j - 1])
 470                                         continue;
 471                                 state->analog_channels[j-1].coupling = i;
 472
 473                                 g_snprintf(command, sizeof(command),
 474                                            (*model->scpi_dialect)[SCPI_CMD_SET_COUPLING],
 475                                            j, tmp);
 476
 477                                 if (sr_scpi_send(sdi->conn, command) != SR_OK ||
 478                                     sr_scpi_get_opc(sdi->conn) != SR_OK)
 479                                         return SR_ERR;
 480                                 break;
 481                         }
 482
 483                         ret = SR_OK;
 484                         break;
 485                 }
 486                 break;
 487         default:
 488                 ret = SR_ERR_NA;
 489                 break;
 490         }
 491
 492         if (ret == SR_OK)
 493                 ret = sr_scpi_get_opc(sdi->conn);
 494
 495         if (ret == SR_OK && update_sample_rate)
 496                 ret = hmo_update_sample_rate(sdi);
 497
 498         return ret;
 499 }
 500
 501 static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
 502                        const struct sr_channel_group *cg)
 503 {
 504         int cg_type = CG_NONE;
 505         struct dev_context *devc = NULL;
 506         struct scope_config *model = NULL;
 507
 508         if (sdi && (devc = sdi->priv)) {
 509                 if ((cg_type = check_channel_group(devc, cg)) == CG_INVALID)
 510                         return SR_ERR;
 511
 512                 model = devc->model_config;
 513         }
 514
 515         switch (key) {
 516         case SR_CONF_SCAN_OPTIONS:
 517                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 518                                 scanopts, ARRAY_SIZE(scanopts), sizeof(uint32_t));
 519                 break;
 520         case SR_CONF_DEVICE_OPTIONS:
 521                 if (cg_type == CG_NONE) {
 522                         if (model)
 523                                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 524                                         model->devopts, model->num_devopts, sizeof(uint32_t));
 525                         else
 526                                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 527                                         drvopts, ARRAY_SIZE(drvopts), sizeof(uint32_t));
 528                 } else if (cg_type == CG_ANALOG) {
 529                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 530                                 model->analog_devopts, model->num_analog_devopts,
 531                                 sizeof(uint32_t));
 532                 } else {
 533                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 534                                 NULL, 0, sizeof(uint32_t));
 535                 }
 536                 break;
 537         case SR_CONF_COUPLING:
 538                 if (cg_type == CG_NONE)
 539                         return SR_ERR_CHANNEL_GROUP;
 540                 *data = g_variant_new_strv(*model->coupling_options,
 541                            g_strv_length((char **)*model->coupling_options));
 542                 break;
 543         case SR_CONF_TRIGGER_SOURCE:
 544                 if (!model)
 545                         return SR_ERR_ARG;
 546                 *data = g_variant_new_strv(*model->trigger_sources,
 547                            g_strv_length((char **)*model->trigger_sources));
 548                 break;
 549         case SR_CONF_TRIGGER_SLOPE:
 550                 if (!model)
 551                         return SR_ERR_ARG;
 552                 *data = g_variant_new_strv(*model->trigger_slopes,
 553                            g_strv_length((char **)*model->trigger_slopes));
 554                 break;
 555         case SR_CONF_TIMEBASE:
 556                 if (!model)
 557                         return SR_ERR_ARG;
 558                 *data = build_tuples(model->timebases, model->num_timebases);
 559                 break;
 560         case SR_CONF_VDIV:
 561                 if (cg_type == CG_NONE)
 562                         return SR_ERR_CHANNEL_GROUP;
 563                 *data = build_tuples(model->vdivs, model->num_vdivs);
 564                 break;
 565         default:
 566                 return SR_ERR_NA;
 567         }
 568
 569         return SR_OK;
 570 }
 571
 572 SR_PRIV int hmo_request_data(const struct sr_dev_inst *sdi)
 573 {
 574         char command[MAX_COMMAND_SIZE];
 575         struct sr_channel *ch;
 576         struct dev_context *devc;
 577         struct scope_config *model;
 578
 579         devc = sdi->priv;
 580         model = devc->model_config;
 581
 582         ch = devc->current_channel->data;
 583
 584         switch (ch->type) {
 585         case SR_CHANNEL_ANALOG:
 586                 g_snprintf(command, sizeof(command),
 587                            (*model->scpi_dialect)[SCPI_CMD_GET_ANALOG_DATA],
 588                            ch->index + 1);
 589                 break;
 590         case SR_CHANNEL_LOGIC:
 591                 g_snprintf(command, sizeof(command),
 592                            (*model->scpi_dialect)[SCPI_CMD_GET_DIG_DATA],
 593                            ch->index < 8 ? 1 : 2);
 594                 break;
 595         default:
 596                 sr_err("Invalid channel type.");
 597                 break;
 598         }
 599
 600         return sr_scpi_send(sdi->conn, command);
 601 }
 602
 603 static int hmo_check_channels(GSList *channels)
 604 {
 605         GSList *l;
 606         struct sr_channel *ch;
 607         gboolean enabled_pod1, enabled_pod2, enabled_chan3, enabled_chan4;
 608
 609         enabled_pod1 = enabled_pod2 = enabled_chan3 = enabled_chan4 = FALSE;
 610
 611         for (l = channels; l; l = l->next) {
 612                 ch = l->data;
 613                 switch (ch->type) {
 614                 case SR_CHANNEL_ANALOG:
 615                         if (ch->index == 2)
 616                                 enabled_chan3 = TRUE;
 617                         else if (ch->index == 3)
 618                                 enabled_chan4 = TRUE;
 619                         break;
 620                 case SR_CHANNEL_LOGIC:
 621                         if (ch->index < 8)
 622                                 enabled_pod1 = TRUE;
 623                         else
 624                                 enabled_pod2 = TRUE;
 625                         break;
 626                 default:
 627                         return SR_ERR;
 628                 }
 629         }
 630
 631         if ((enabled_pod1 && enabled_chan3) ||
 632             (enabled_pod2 && enabled_chan4))
 633                 return SR_ERR;
 634
 635         return SR_OK;
 636 }
 637
 638 static int hmo_setup_channels(const struct sr_dev_inst *sdi)
 639 {
 640         GSList *l;
 641         unsigned int i;
 642         gboolean *pod_enabled, setup_changed;
 643         char command[MAX_COMMAND_SIZE];
 644         struct scope_state *state;
 645         struct scope_config *model;
 646         struct sr_channel *ch;
 647         struct dev_context *devc;
 648         struct sr_scpi_dev_inst *scpi;
 649
 650         devc = sdi->priv;
 651         scpi = sdi->conn;
 652         state = devc->model_state;
 653         model = devc->model_config;
 654         setup_changed = FALSE;
 655
 656         pod_enabled = g_try_malloc0(sizeof(gboolean) * model->digital_pods);
 657
 658         for (l = sdi->channels; l; l = l->next) {
 659                 ch = l->data;
 660                 switch (ch->type) {
 661                 case SR_CHANNEL_ANALOG:
 662                         if (ch->enabled == state->analog_channels[ch->index].state)
 663                                 break;
 664                         g_snprintf(command, sizeof(command),
 665                                    (*model->scpi_dialect)[SCPI_CMD_SET_ANALOG_CHAN_STATE],
 666                                    ch->index + 1, ch->enabled);
 667
 668                         if (sr_scpi_send(scpi, command) != SR_OK)
 669                                 return SR_ERR;
 670                         state->analog_channels[ch->index].state = ch->enabled;
 671                         setup_changed = TRUE;
 672                         break;
 673                 case SR_CHANNEL_LOGIC:
 674                         /*
 675                          * A digital POD needs to be enabled for every group of
 676                          * 8 channels.
 677                          */
 678                         if (ch->enabled)
 679                                 pod_enabled[ch->index < 8 ? 0 : 1] = TRUE;
 680
 681                         if (ch->enabled == state->digital_channels[ch->index])
 682                                 break;
 683                         g_snprintf(command, sizeof(command),
 684                                    (*model->scpi_dialect)[SCPI_CMD_SET_DIG_CHAN_STATE],
 685                                    ch->index, ch->enabled);
 686
 687                         if (sr_scpi_send(scpi, command) != SR_OK)
 688                                 return SR_ERR;
 689
 690                         state->digital_channels[ch->index] = ch->enabled;
 691                         setup_changed = TRUE;
 692                         break;
 693                 default:
 694                         return SR_ERR;
 695                 }
 696         }
 697
 698         for (i = 1; i <= model->digital_pods; ++i) {
 699                 if (state->digital_pods[i - 1] == pod_enabled[i - 1])
 700                         continue;
 701                 g_snprintf(command, sizeof(command),
 702                            (*model->scpi_dialect)[SCPI_CMD_SET_DIG_POD_STATE],
 703                            i, pod_enabled[i - 1]);
 704                 if (sr_scpi_send(scpi, command) != SR_OK)
 705                         return SR_ERR;
 706                 state->digital_pods[i - 1] = pod_enabled[i - 1];
 707                 setup_changed = TRUE;
 708         }
 709
 710         g_free(pod_enabled);
 711
 712         if (setup_changed && hmo_update_sample_rate(sdi) != SR_OK)
 713                 return SR_ERR;
 714
 715         return SR_OK;
 716 }
 717
 718 static int dev_acquisition_start(const struct sr_dev_inst *sdi, void *cb_data)
 719 {
 720         GSList *l;
 721         gboolean digital_added;
 722         struct sr_channel *ch;
 723         struct dev_context *devc;
 724         struct sr_scpi_dev_inst *scpi;
 725
 726         if (sdi->status != SR_ST_ACTIVE)
 727                 return SR_ERR_DEV_CLOSED;
 728
 729         scpi = sdi->conn;
 730         devc = sdi->priv;
 731         digital_added = FALSE;
 732
 733         g_slist_free(devc->enabled_channels);
 734         devc->enabled_channels = NULL;
 735
 736         for (l = sdi->channels; l; l = l->next) {
 737                 ch = l->data;
 738                 if (!ch->enabled)
 739                         continue;
 740                 /* Only add a single digital channel. */
 741                 if (ch->type != SR_CHANNEL_LOGIC || !digital_added) {
 742                         devc->enabled_channels = g_slist_append(
 743                                         devc->enabled_channels, ch);
 744                         if (ch->type == SR_CHANNEL_LOGIC)
 745                                 digital_added = TRUE;
 746                 }
 747         }
 748
 749         if (!devc->enabled_channels)
 750                 return SR_ERR;
 751
 752         if (hmo_check_channels(devc->enabled_channels) != SR_OK) {
 753                 sr_err("Invalid channel configuration specified!");
 754                 return SR_ERR_NA;
 755         }
 756
 757         if (hmo_setup_channels(sdi) != SR_OK) {
 758                 sr_err("Failed to setup channel configuration!");
 759                 return SR_ERR;
 760         }
 761
 762         sr_scpi_source_add(sdi->session, scpi, G_IO_IN, 50,
 763                         hmo_receive_data, (void *)sdi);
 764
 765         /* Send header packet to the session bus. */
 766         std_session_send_df_header(cb_data, LOG_PREFIX);
 767
 768         devc->current_channel = devc->enabled_channels;
 769
 770         return hmo_request_data(sdi);
 771 }
 772
 773 static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
 774 {
 775         struct dev_context *devc;
 776         struct sr_scpi_dev_inst *scpi;
 777         struct sr_datafeed_packet packet;
 778
 779         (void)cb_data;
 780
 781         packet.type = SR_DF_END;
 782         packet.payload = NULL;
 783         sr_session_send(sdi, &packet);
 784
 785         if (sdi->status != SR_ST_ACTIVE)
 786                 return SR_ERR_DEV_CLOSED;
 787
 788         devc = sdi->priv;
 789
 790         devc->num_frames = 0;
 791         g_slist_free(devc->enabled_channels);
 792         devc->enabled_channels = NULL;
 793         scpi = sdi->conn;
 794         sr_scpi_source_remove(sdi->session, scpi);
 795
 796         return SR_OK;
 797 }
 798
 799 SR_PRIV struct sr_dev_driver hameg_hmo_driver_info = {
 800         .name = "hameg-hmo",
 801         .longname = "Hameg HMO",
 802         .api_version = 1,
 803         .init = init,
 804         .cleanup = cleanup,
 805         .scan = scan,
 806         .dev_list = dev_list,
 807         .dev_clear = dev_clear,
 808         .config_get = config_get,
 809         .config_set = config_set,
 810         .config_list = config_list,
 811         .dev_open = dev_open,
 812         .dev_close = dev_close,
 813         .dev_acquisition_start = dev_acquisition_start,
 814         .dev_acquisition_stop = dev_acquisition_stop,
 815         .priv = NULL,
 816 };