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
  27 static const char *manufacturers[] = {
  28         "HAMEG",
  29 };
  30
  31 static const uint32_t drvopts[] = {
  32         SR_CONF_OSCILLOSCOPE,
  33 };
  34
  35 static const uint32_t scanopts[] = {
  36         SR_CONF_CONN,
  37         SR_CONF_SERIALCOMM,
  38 };
  39
  40 enum {
  41         CG_INVALID = -1,
  42         CG_NONE,
  43         CG_ANALOG,
  44         CG_DIGITAL,
  45 };
  46
  47 static int init(struct sr_dev_driver *di, struct sr_context *sr_ctx)
  48 {
  49         return std_init(sr_ctx, di, LOG_PREFIX);
  50 }
  51
  52 static int check_manufacturer(const char *manufacturer)
  53 {
  54         unsigned int i;
  55
  56         for (i = 0; i < ARRAY_SIZE(manufacturers); ++i)
  57                 if (!strcmp(manufacturer, manufacturers[i]))
  58                         return SR_OK;
  59
  60         return SR_ERR;
  61 }
  62
  63 static struct sr_dev_inst *hmo_probe_serial_device(struct sr_scpi_dev_inst *scpi)
  64 {
  65         struct sr_dev_inst *sdi;
  66         struct dev_context *devc;
  67         struct sr_scpi_hw_info *hw_info;
  68
  69         sdi = NULL;
  70         devc = NULL;
  71         hw_info = NULL;
  72
  73         if (sr_scpi_get_hw_id(scpi, &hw_info) != SR_OK) {
  74                 sr_info("Couldn't get IDN response.");
  75                 goto fail;
  76         }
  77
  78         if (check_manufacturer(hw_info->manufacturer) != SR_OK)
  79                 goto fail;
  80
  81         sdi = g_malloc0(sizeof(struct sr_dev_inst));
  82         sdi->status = SR_ST_ACTIVE;
  83         sdi->vendor = g_strdup(hw_info->manufacturer);
  84         sdi->model = g_strdup(hw_info->model);
  85         sdi->version = g_strdup(hw_info->firmware_version);
  86         sdi->serial_num = g_strdup(hw_info->serial_number);
  87         sdi->driver = &hameg_hmo_driver_info;
  88         sdi->inst_type = SR_INST_SCPI;
  89         sdi->conn = scpi;
  90
  91         sr_scpi_hw_info_free(hw_info);
  92         hw_info = NULL;
  93
  94         devc = g_malloc0(sizeof(struct dev_context));
  95
  96         sdi->priv = devc;
  97
  98         if (hmo_init_device(sdi) != SR_OK)
  99                 goto fail;
 100
 101         sr_scpi_close(sdi->conn);
 102
 103         sdi->status = SR_ST_INACTIVE;
 104
 105         return sdi;
 106
 107 fail:
 108         if (hw_info)
 109                 sr_scpi_hw_info_free(hw_info);
 110         if (sdi)
 111                 sr_dev_inst_free(sdi);
 112         if (devc)
 113                 g_free(devc);
 114
 115         return NULL;
 116 }
 117
 118 static GSList *scan(struct sr_dev_driver *di, GSList *options)
 119 {
 120         return sr_scpi_scan(di->priv, options, hmo_probe_serial_device);
 121 }
 122
 123 static GSList *dev_list(const struct sr_dev_driver *di)
 124 {
 125         return ((struct drv_context *)(di->priv))->instances;
 126 }
 127
 128 static void clear_helper(void *priv)
 129 {
 130         struct dev_context *devc;
 131
 132         devc = priv;
 133
 134         hmo_scope_state_free(devc->model_state);
 135
 136         g_free(devc->analog_groups);
 137         g_free(devc->digital_groups);
 138
 139         g_free(devc);
 140 }
 141
 142 static int dev_clear(const struct sr_dev_driver *di)
 143 {
 144         return std_dev_clear(di, clear_helper);
 145 }
 146
 147 static int dev_open(struct sr_dev_inst *sdi)
 148 {
 149         if (sdi->status != SR_ST_ACTIVE && sr_scpi_open(sdi->conn) != SR_OK)
 150                 return SR_ERR;
 151
 152         if (hmo_scope_state_get(sdi) != SR_OK)
 153                 return SR_ERR;
 154
 155         sdi->status = SR_ST_ACTIVE;
 156
 157         return SR_OK;
 158 }
 159
 160 static int dev_close(struct sr_dev_inst *sdi)
 161 {
 162         if (sdi->status == SR_ST_INACTIVE)
 163                 return SR_OK;
 164
 165         sr_scpi_close(sdi->conn);
 166
 167         sdi->status = SR_ST_INACTIVE;
 168
 169         return SR_OK;
 170 }
 171
 172 static int cleanup(const struct sr_dev_driver *di)
 173 {
 174         dev_clear(di);
 175
 176         return SR_OK;
 177 }
 178
 179 static int check_channel_group(struct dev_context *devc,
 180                              const struct sr_channel_group *cg)
 181 {
 182         unsigned int i;
 183         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->digital_pods; ++i)
 195                 if (cg == devc->digital_groups[i])
 196                         return CG_DIGITAL;
 197
 198         sr_err("Invalid channel group specified.");
 199
 200         return CG_INVALID;
 201 }
 202
 203 static int config_get(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
 204                       const struct sr_channel_group *cg)
 205 {
 206         int ret, cg_type;
 207         unsigned int i;
 208         struct dev_context *devc;
 209         struct scope_config *model;
 210         struct scope_state *state;
 211
 212         if (!sdi || !(devc = sdi->priv))
 213                 return SR_ERR_ARG;
 214
 215         if ((cg_type = check_channel_group(devc, cg)) == CG_INVALID)
 216                 return SR_ERR;
 217
 218         ret = SR_ERR_NA;
 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)", (*model->timebases)[state->timebase][0],
 229                                       (*model->timebases)[state->timebase][1]);
 230                 ret = SR_OK;
 231                 break;
 232         case SR_CONF_NUM_VDIV:
 233                 if (cg_type == CG_NONE) {
 234                         sr_err("No channel group specified.");
 235                         return SR_ERR_CHANNEL_GROUP;
 236                 } else if (cg_type == CG_ANALOG) {
 237                         for (i = 0; i < model->analog_channels; ++i) {
 238                                 if (cg != devc->analog_groups[i])
 239                                         continue;
 240                                 *data = g_variant_new_int32(model->num_ydivs);
 241                                 ret = SR_OK;
 242                                 break;
 243                         }
 244
 245                 } else {
 246                         ret = SR_ERR_NA;
 247                 }
 248                 break;
 249         case SR_CONF_VDIV:
 250                 if (cg_type == CG_NONE) {
 251                         sr_err("No channel group specified.");
 252                         return SR_ERR_CHANNEL_GROUP;
 253                 } else if (cg_type == CG_ANALOG) {
 254                         for (i = 0; i < model->analog_channels; ++i) {
 255                                 if (cg != devc->analog_groups[i])
 256                                         continue;
 257                                 *data = g_variant_new("(tt)",
 258                                                       (*model->vdivs)[state->analog_channels[i].vdiv][0],
 259                                                       (*model->vdivs)[state->analog_channels[i].vdiv][1]);
 260                                 ret = SR_OK;
 261                                 break;
 262                         }
 263
 264                 } else {
 265                         ret = SR_ERR_NA;
 266                 }
 267                 break;
 268         case SR_CONF_TRIGGER_SOURCE:
 269                 *data = g_variant_new_string((*model->trigger_sources)[state->trigger_source]);
 270                 ret = SR_OK;
 271                 break;
 272         case SR_CONF_TRIGGER_SLOPE:
 273                 *data = g_variant_new_string((*model->trigger_slopes)[state->trigger_slope]);
 274                 ret = SR_OK;
 275                 break;
 276         case SR_CONF_HORIZ_TRIGGERPOS:
 277                 *data = g_variant_new_double(state->horiz_triggerpos);
 278                 ret = SR_OK;
 279                 break;
 280         case SR_CONF_COUPLING:
 281                 if (cg_type == CG_NONE) {
 282                         sr_err("No channel group specified.");
 283                         return SR_ERR_CHANNEL_GROUP;
 284                 } else if (cg_type == CG_ANALOG) {
 285                         for (i = 0; i < model->analog_channels; ++i) {
 286                                 if (cg != devc->analog_groups[i])
 287                                         continue;
 288                                 *data = g_variant_new_string((*model->coupling_options)[state->analog_channels[i].coupling]);
 289                                 ret = SR_OK;
 290                                 break;
 291                         }
 292
 293                 } else {
 294                         ret = SR_ERR_NA;
 295                 }
 296                 break;
 297         case SR_CONF_SAMPLERATE:
 298                 *data = g_variant_new_uint64(state->sample_rate);
 299                 ret = SR_OK;
 300                 break;
 301         default:
 302                 ret = SR_ERR_NA;
 303         }
 304
 305         return ret;
 306 }
 307
 308 static GVariant *build_tuples(const uint64_t (*array)[][2], unsigned int n)
 309 {
 310         unsigned int i;
 311         GVariant *rational[2];
 312         GVariantBuilder gvb;
 313
 314         g_variant_builder_init(&gvb, G_VARIANT_TYPE_ARRAY);
 315
 316         for (i = 0; i < n; i++) {
 317                 rational[0] = g_variant_new_uint64((*array)[i][0]);
 318                 rational[1] = g_variant_new_uint64((*array)[i][1]);
 319
 320                 /* FIXME: Valgrind reports a memory leak here. */
 321                 g_variant_builder_add_value(&gvb, g_variant_new_tuple(rational, 2));
 322         }
 323
 324         return g_variant_builder_end(&gvb);
 325 }
 326
 327 static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sdi,
 328                       const struct sr_channel_group *cg)
 329 {
 330         int ret, cg_type;
 331         unsigned int i, j;
 332         char command[MAX_COMMAND_SIZE], float_str[30];
 333         struct dev_context *devc;
 334         struct scope_config *model;
 335         struct scope_state *state;
 336         const char *tmp;
 337         uint64_t p, q;
 338         double tmp_d;
 339         gboolean update_sample_rate;
 340
 341         if (!sdi || !(devc = sdi->priv))
 342                 return SR_ERR_ARG;
 343
 344         if ((cg_type = check_channel_group(devc, cg)) == CG_INVALID)
 345                 return SR_ERR;
 346
 347         model = devc->model_config;
 348         state = devc->model_state;
 349         update_sample_rate = FALSE;
 350
 351         ret = SR_ERR_NA;
 352
 353         switch (key) {
 354         case SR_CONF_LIMIT_FRAMES:
 355                 devc->frame_limit = g_variant_get_uint64(data);
 356                 ret = SR_OK;
 357                 break;
 358         case SR_CONF_TRIGGER_SOURCE:
 359                 tmp = g_variant_get_string(data, NULL);
 360                 for (i = 0; (*model->trigger_sources)[i]; i++) {
 361                         if (g_strcmp0(tmp, (*model->trigger_sources)[i]) != 0)
 362                                 continue;
 363                         state->trigger_source = i;
 364                         g_snprintf(command, sizeof(command),
 365                                    (*model->scpi_dialect)[SCPI_CMD_SET_TRIGGER_SOURCE],
 366                                    (*model->trigger_sources)[i]);
 367
 368                         ret = sr_scpi_send(sdi->conn, command);
 369                         break;
 370                 }
 371                 break;
 372         case SR_CONF_VDIV:
 373                 if (cg_type == CG_NONE) {
 374                         sr_err("No channel group specified.");
 375                         return SR_ERR_CHANNEL_GROUP;
 376                 }
 377
 378                 g_variant_get(data, "(tt)", &p, &q);
 379
 380                 for (i = 0; i < model->num_vdivs; i++) {
 381                         if (p != (*model->vdivs)[i][0] ||
 382                             q != (*model->vdivs)[i][1])
 383                                 continue;
 384                         for (j = 1; j <= model->analog_channels; ++j) {
 385                                 if (cg != devc->analog_groups[j - 1])
 386                                         continue;
 387                                 state->analog_channels[j - 1].vdiv = i;
 388                                 g_ascii_formatd(float_str, sizeof(float_str), "%E", (float) p / q);
 389                                 g_snprintf(command, sizeof(command),
 390                                            (*model->scpi_dialect)[SCPI_CMD_SET_VERTICAL_DIV],
 391                                            j, float_str);
 392
 393                                 if (sr_scpi_send(sdi->conn, command) != SR_OK ||
 394                                     sr_scpi_get_opc(sdi->conn) != SR_OK)
 395                                         return SR_ERR;
 396
 397                                 break;
 398                         }
 399
 400                         ret = SR_OK;
 401                         break;
 402                 }
 403                 break;
 404         case SR_CONF_TIMEBASE:
 405                 g_variant_get(data, "(tt)", &p, &q);
 406
 407                 for (i = 0; i < model->num_timebases; i++) {
 408                         if (p != (*model->timebases)[i][0] ||
 409                             q != (*model->timebases)[i][1])
 410                                 continue;
 411                         state->timebase = i;
 412                         g_ascii_formatd(float_str, sizeof(float_str), "%E", (float) p / q);
 413                         g_snprintf(command, sizeof(command),
 414                                    (*model->scpi_dialect)[SCPI_CMD_SET_TIMEBASE],
 415                                    float_str);
 416
 417                         ret = sr_scpi_send(sdi->conn, command);
 418                         update_sample_rate = TRUE;
 419                         break;
 420                 }
 421                 break;
 422         case SR_CONF_HORIZ_TRIGGERPOS:
 423                 tmp_d = g_variant_get_double(data);
 424
 425                 if (tmp_d < 0.0 || tmp_d > 1.0)
 426                         return SR_ERR;
 427
 428                 state->horiz_triggerpos = tmp_d;
 429                 tmp_d = -(tmp_d - 0.5) *
 430                         ((double) (*model->timebases)[state->timebase][0] /
 431                         (*model->timebases)[state->timebase][1])
 432                          * model->num_xdivs;
 433
 434                 g_ascii_formatd(float_str, sizeof(float_str), "%E", tmp_d);
 435                 g_snprintf(command, sizeof(command),
 436                            (*model->scpi_dialect)[SCPI_CMD_SET_HORIZ_TRIGGERPOS],
 437                            float_str);
 438
 439                 ret = sr_scpi_send(sdi->conn, command);
 440                 break;
 441         case SR_CONF_TRIGGER_SLOPE:
 442                 tmp = g_variant_get_string(data, NULL);
 443
 444                 if (!tmp || !(tmp[0] == 'f' || tmp[0] == 'r'))
 445                         return SR_ERR_ARG;
 446
 447                 state->trigger_slope = (tmp[0] == 'r') ? 0 : 1;
 448
 449                 g_snprintf(command, sizeof(command),
 450                            (*model->scpi_dialect)[SCPI_CMD_SET_TRIGGER_SLOPE],
 451                            (state->trigger_slope == 0) ? "POS" : "NEG");
 452
 453                 ret = sr_scpi_send(sdi->conn, command);
 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_channels[j-1].coupling = i;
 470
 471                                 g_snprintf(command, sizeof(command),
 472                                            (*model->scpi_dialect)[SCPI_CMD_SET_COUPLING],
 473                                            j, tmp);
 474
 475                                 if (sr_scpi_send(sdi->conn, command) != SR_OK ||
 476                                     sr_scpi_get_opc(sdi->conn) != SR_OK)
 477                                         return SR_ERR;
 478                                 break;
 479                         }
 480
 481                         ret = SR_OK;
 482                         break;
 483                 }
 484                 break;
 485         default:
 486                 ret = SR_ERR_NA;
 487                 break;
 488         }
 489
 490         if (ret == SR_OK)
 491                 ret = sr_scpi_get_opc(sdi->conn);
 492
 493         if (ret == SR_OK && update_sample_rate)
 494                 ret = hmo_update_sample_rate(sdi);
 495
 496         return ret;
 497 }
 498
 499 static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
 500                        const struct sr_channel_group *cg)
 501 {
 502         int cg_type = CG_NONE;
 503         struct dev_context *devc = NULL;
 504         struct scope_config *model = NULL;
 505
 506         if (sdi && (devc = sdi->priv)) {
 507                 if ((cg_type = check_channel_group(devc, cg)) == CG_INVALID)
 508                         return SR_ERR;
 509
 510                 model = devc->model_config;
 511         }
 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                         if (model)
 521                                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 522                                         model->devopts, model->num_devopts, sizeof(uint32_t));
 523                         else
 524                                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 525                                         drvopts, ARRAY_SIZE(drvopts), sizeof(uint32_t));
 526                 } else if (cg_type == CG_ANALOG) {
 527                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 528                                 model->analog_devopts, model->num_analog_devopts,
 529                                 sizeof(uint32_t));
 530                 } else {
 531                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 532                                 NULL, 0, sizeof(uint32_t));
 533                 }
 534                 break;
 535         case SR_CONF_COUPLING:
 536                 if (cg_type == CG_NONE)
 537                         return SR_ERR_CHANNEL_GROUP;
 538                 *data = g_variant_new_strv(*model->coupling_options,
 539                            g_strv_length((char **)*model->coupling_options));
 540                 break;
 541         case SR_CONF_TRIGGER_SOURCE:
 542                 if (!model)
 543                         return SR_ERR_ARG;
 544                 *data = g_variant_new_strv(*model->trigger_sources,
 545                            g_strv_length((char **)*model->trigger_sources));
 546                 break;
 547         case SR_CONF_TRIGGER_SLOPE:
 548                 if (!model)
 549                         return SR_ERR_ARG;
 550                 *data = g_variant_new_strv(*model->trigger_slopes,
 551                            g_strv_length((char **)*model->trigger_slopes));
 552                 break;
 553         case SR_CONF_TIMEBASE:
 554                 if (!model)
 555                         return SR_ERR_ARG;
 556                 *data = build_tuples(model->timebases, model->num_timebases);
 557                 break;
 558         case SR_CONF_VDIV:
 559                 if (cg_type == CG_NONE)
 560                         return SR_ERR_CHANNEL_GROUP;
 561                 *data = build_tuples(model->vdivs, model->num_vdivs);
 562                 break;
 563         default:
 564                 return SR_ERR_NA;
 565         }
 566
 567         return SR_OK;
 568 }
 569
 570 SR_PRIV int hmo_request_data(const struct sr_dev_inst *sdi)
 571 {
 572         char command[MAX_COMMAND_SIZE];
 573         struct sr_channel *ch;
 574         struct dev_context *devc;
 575         struct scope_config *model;
 576
 577         devc = sdi->priv;
 578         model = devc->model_config;
 579
 580         ch = devc->current_channel->data;
 581
 582         switch (ch->type) {
 583         case SR_CHANNEL_ANALOG:
 584                 g_snprintf(command, sizeof(command),
 585                            (*model->scpi_dialect)[SCPI_CMD_GET_ANALOG_DATA],
 586                            ch->index + 1);
 587                 break;
 588         case SR_CHANNEL_LOGIC:
 589                 g_snprintf(command, sizeof(command),
 590                            (*model->scpi_dialect)[SCPI_CMD_GET_DIG_DATA],
 591                            ch->index < 8 ? 1 : 2);
 592                 break;
 593         default:
 594                 sr_err("Invalid channel type.");
 595                 break;
 596         }
 597
 598         return sr_scpi_send(sdi->conn, command);
 599 }
 600
 601 static int hmo_check_channels(GSList *channels)
 602 {
 603         GSList *l;
 604         struct sr_channel *ch;
 605         gboolean enabled_pod1, enabled_pod2, enabled_chan3, enabled_chan4;
 606
 607         enabled_pod1 = enabled_pod2 = enabled_chan3 = enabled_chan4 = FALSE;
 608
 609         for (l = channels; l; l = l->next) {
 610                 ch = l->data;
 611                 switch (ch->type) {
 612                 case SR_CHANNEL_ANALOG:
 613                         if (ch->index == 2)
 614                                 enabled_chan3 = TRUE;
 615                         else if (ch->index == 3)
 616                                 enabled_chan4 = TRUE;
 617                         break;
 618                 case SR_CHANNEL_LOGIC:
 619                         if (ch->index < 8)
 620                                 enabled_pod1 = TRUE;
 621                         else
 622                                 enabled_pod2 = TRUE;
 623                         break;
 624                 default:
 625                         return SR_ERR;
 626                 }
 627         }
 628
 629         if ((enabled_pod1 && enabled_chan3) ||
 630             (enabled_pod2 && enabled_chan4))
 631                 return SR_ERR;
 632
 633         return SR_OK;
 634 }
 635
 636 static int hmo_setup_channels(const struct sr_dev_inst *sdi)
 637 {
 638         GSList *l;
 639         unsigned int i;
 640         gboolean *pod_enabled, setup_changed;
 641         char command[MAX_COMMAND_SIZE];
 642         struct scope_state *state;
 643         struct scope_config *model;
 644         struct sr_channel *ch;
 645         struct dev_context *devc;
 646         struct sr_scpi_dev_inst *scpi;
 647
 648         devc = sdi->priv;
 649         scpi = sdi->conn;
 650         state = devc->model_state;
 651         model = devc->model_config;
 652         setup_changed = FALSE;
 653
 654         pod_enabled = g_try_malloc0(sizeof(gboolean) * model->digital_pods);
 655
 656         for (l = sdi->channels; l; l = l->next) {
 657                 ch = l->data;
 658                 switch (ch->type) {
 659                 case SR_CHANNEL_ANALOG:
 660                         if (ch->enabled == state->analog_channels[ch->index].state)
 661                                 break;
 662                         g_snprintf(command, sizeof(command),
 663                                    (*model->scpi_dialect)[SCPI_CMD_SET_ANALOG_CHAN_STATE],
 664                                    ch->index + 1, ch->enabled);
 665
 666                         if (sr_scpi_send(scpi, command) != SR_OK)
 667                                 return SR_ERR;
 668                         state->analog_channels[ch->index].state = ch->enabled;
 669                         setup_changed = TRUE;
 670                         break;
 671                 case SR_CHANNEL_LOGIC:
 672                         /*
 673                          * A digital POD needs to be enabled for every group of
 674                          * 8 channels.
 675                          */
 676                         if (ch->enabled)
 677                                 pod_enabled[ch->index < 8 ? 0 : 1] = TRUE;
 678
 679                         if (ch->enabled == state->digital_channels[ch->index])
 680                                 break;
 681                         g_snprintf(command, sizeof(command),
 682                                    (*model->scpi_dialect)[SCPI_CMD_SET_DIG_CHAN_STATE],
 683                                    ch->index, ch->enabled);
 684
 685                         if (sr_scpi_send(scpi, command) != SR_OK)
 686                                 return SR_ERR;
 687
 688                         state->digital_channels[ch->index] = ch->enabled;
 689                         setup_changed = TRUE;
 690                         break;
 691                 default:
 692                         return SR_ERR;
 693                 }
 694         }
 695
 696         for (i = 1; i <= model->digital_pods; ++i) {
 697                 if (state->digital_pods[i - 1] == pod_enabled[i - 1])
 698                         continue;
 699                 g_snprintf(command, sizeof(command),
 700                            (*model->scpi_dialect)[SCPI_CMD_SET_DIG_POD_STATE],
 701                            i, pod_enabled[i - 1]);
 702                 if (sr_scpi_send(scpi, command) != SR_OK)
 703                         return SR_ERR;
 704                 state->digital_pods[i - 1] = pod_enabled[i - 1];
 705                 setup_changed = TRUE;
 706         }
 707
 708         g_free(pod_enabled);
 709
 710         if (setup_changed && hmo_update_sample_rate(sdi) != SR_OK)
 711                 return SR_ERR;
 712
 713         return SR_OK;
 714 }
 715
 716 static int dev_acquisition_start(const struct sr_dev_inst *sdi, void *cb_data)
 717 {
 718         GSList *l;
 719         gboolean digital_added;
 720         struct sr_channel *ch;
 721         struct dev_context *devc;
 722         struct sr_scpi_dev_inst *scpi;
 723
 724         if (sdi->status != SR_ST_ACTIVE)
 725                 return SR_ERR_DEV_CLOSED;
 726
 727         scpi = sdi->conn;
 728         devc = sdi->priv;
 729         digital_added = FALSE;
 730
 731         g_slist_free(devc->enabled_channels);
 732         devc->enabled_channels = NULL;
 733
 734         for (l = sdi->channels; l; l = l->next) {
 735                 ch = l->data;
 736                 if (!ch->enabled)
 737                         continue;
 738                 /* Only add a single digital channel. */
 739                 if (ch->type != SR_CHANNEL_LOGIC || !digital_added) {
 740                         devc->enabled_channels = g_slist_append(
 741                                         devc->enabled_channels, ch);
 742                         if (ch->type == SR_CHANNEL_LOGIC)
 743                                 digital_added = TRUE;
 744                 }
 745         }
 746
 747         if (!devc->enabled_channels)
 748                 return SR_ERR;
 749
 750         if (hmo_check_channels(devc->enabled_channels) != SR_OK) {
 751                 sr_err("Invalid channel configuration specified!");
 752                 return SR_ERR_NA;
 753         }
 754
 755         if (hmo_setup_channels(sdi) != SR_OK) {
 756                 sr_err("Failed to setup channel configuration!");
 757                 return SR_ERR;
 758         }
 759
 760         sr_scpi_source_add(sdi->session, scpi, G_IO_IN, 50,
 761                         hmo_receive_data, (void *)sdi);
 762
 763         /* Send header packet to the session bus. */
 764         std_session_send_df_header(cb_data, LOG_PREFIX);
 765
 766         devc->current_channel = devc->enabled_channels;
 767
 768         return hmo_request_data(sdi);
 769 }
 770
 771 static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
 772 {
 773         struct dev_context *devc;
 774         struct sr_scpi_dev_inst *scpi;
 775         struct sr_datafeed_packet packet;
 776
 777         (void)cb_data;
 778
 779         packet.type = SR_DF_END;
 780         packet.payload = NULL;
 781         sr_session_send(sdi, &packet);
 782
 783         if (sdi->status != SR_ST_ACTIVE)
 784                 return SR_ERR_DEV_CLOSED;
 785
 786         devc = sdi->priv;
 787
 788         devc->num_frames = 0;
 789         g_slist_free(devc->enabled_channels);
 790         devc->enabled_channels = NULL;
 791         scpi = sdi->conn;
 792         sr_scpi_source_remove(sdi->session, scpi);
 793
 794         return SR_OK;
 795 }
 796
 797 SR_PRIV struct sr_dev_driver hameg_hmo_driver_info = {
 798         .name = "hameg-hmo",
 799         .longname = "Hameg HMO",
 800         .api_version = 1,
 801         .init = init,
 802         .cleanup = cleanup,
 803         .scan = scan,
 804         .dev_list = dev_list,
 805         .dev_clear = dev_clear,
 806         .config_get = config_get,
 807         .config_set = config_set,
 808         .config_list = config_list,
 809         .dev_open = dev_open,
 810         .dev_close = dev_close,
 811         .dev_acquisition_start = dev_acquisition_start,
 812         .dev_acquisition_stop = dev_acquisition_stop,
 813         .priv = NULL,
 814 };