src/hardware/siglent-sds/protocol.c

   1 /*
   2  * This file is part of the libsigrok project.
   3  *
   4  * Copyright (C) 2016 mhooijboer <marchelh@gmail.com>
   5  * Copyright (C) 2012 Martin Ling <martin-git@earth.li>
   6  * Copyright (C) 2013 Bert Vermeulen <bert@biot.com>
   7  * Copyright (C) 2013 Mathias Grimmberger <mgri@zaphod.sax.de>
   8  *
   9  * This program is free software: you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation, either version 3 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  21  */
  22
  23 #define _GNU_SOURCE
  24
  25 #include <config.h>
  26 #include <errno.h>
  27 #include <glib.h>
  28 #include <math.h>
  29 #include <stdlib.h>
  30 #include <stdarg.h>
  31 #include <string.h>
  32 #include <time.h>
  33 #include <unistd.h>
  34 #include <libsigrok/libsigrok.h>
  35 #include "libsigrok-internal.h"
  36 #include "scpi.h"
  37 #include "protocol.h"
  38
  39 /* Set the next event to wait for in siglent_sds_receive(). */
  40 static void siglent_sds_set_wait_event(struct dev_context *devc, enum wait_events event)
  41 {
  42         if (event == WAIT_STOP) {
  43                 devc->wait_status = 2;
  44         } else {
  45                 devc->wait_status = 1;
  46                 devc->wait_event = event;
  47         }
  48 }
  49
  50 /*
  51  * Waiting for a event will return a timeout after 2 to 3 seconds in order
  52  * to not block the application.
  53  */
  54 static int siglent_sds_event_wait(const struct sr_dev_inst *sdi)
  55 {
  56         char *buf;
  57         long s;
  58         int out;
  59         struct dev_context *devc;
  60         time_t start;
  61
  62         if (!(devc = sdi->priv))
  63                 return SR_ERR;
  64
  65         start = time(NULL);
  66
  67         s = 10000; /* Sleep time for status refresh. */
  68         if (devc->wait_status == 1) {
  69                 do {
  70                         if (time(NULL) - start >= 3) {
  71                                 sr_dbg("Timeout waiting for trigger.");
  72                                 return SR_ERR_TIMEOUT;
  73                         }
  74
  75                         if (sr_scpi_get_string(sdi->conn, ":INR?", &buf) != SR_OK)
  76                                 return SR_ERR;
  77                         sr_atoi(buf, &out);
  78                         g_usleep(s);
  79                 } while (out == 0);
  80
  81                 sr_dbg("Device triggered.");
  82
  83                 if ((devc->timebase < 0.51) && (devc->timebase > 0.99e-6)) {
  84                         /*
  85                          * Timebase * num hor. divs * 85(%) * 1e6(usecs) / 100
  86                          * -> 85 percent of sweep time
  87                          */
  88                         s = (devc->timebase * devc->model->series->num_horizontal_divs * 1000);
  89                         sr_spew("Sleeping for %ld usecs after trigger, "
  90                                 "to let the acq buffer in the device fill", s);
  91                         g_usleep(s);
  92                 }
  93         }
  94         if (devc->wait_status == 2) {
  95                 do {
  96                         if (time(NULL) - start >= 3) {
  97                                 sr_dbg("Timeout waiting for trigger.");
  98                                 return SR_ERR_TIMEOUT;
  99                         }
 100                         if (sr_scpi_get_string(sdi->conn, ":INR?", &buf) != SR_OK)
 101                                 return SR_ERR;
 102                         sr_atoi(buf, &out);
 103                         g_usleep(s);
 104                 /* XXX
 105                  * Now this loop condition looks suspicious! A bitwise
 106                  * OR of a variable and a non-zero literal should be
 107                  * non-zero. Logical AND of several non-zero values
 108                  * should be non-zero. Are many parts of the condition
 109                  * not taking effect? Was some different condition meant
 110                  * to get encoded? This needs review, and adjustment.
 111                  */
 112                 } while ((out | DEVICE_STATE_TRIG_RDY && out | DEVICE_STATE_DATA_ACQ) && out | DEVICE_STATE_STOPPED);
 113                 sr_dbg("Device triggerd 2.");
 114                 siglent_sds_set_wait_event(devc, WAIT_NONE);
 115         }
 116
 117         return SR_OK;
 118 }
 119
 120 static int siglent_sds_trigger_wait(const struct sr_dev_inst *sdi)
 121 {
 122         struct dev_context *devc;
 123
 124         if (!(devc = sdi->priv))
 125                 return SR_ERR;
 126         return siglent_sds_event_wait(sdi);
 127 }
 128
 129 /* Wait for scope to got to "Stop" in single shot mode. */
 130 static int siglent_sds_stop_wait(const struct sr_dev_inst *sdi)
 131 {
 132         return siglent_sds_event_wait(sdi);
 133 }
 134
 135 /* Send a configuration setting. */
 136 SR_PRIV int siglent_sds_config_set(const struct sr_dev_inst *sdi, const char *format, ...)
 137 {
 138         va_list args;
 139         int ret;
 140
 141         va_start(args, format);
 142         ret = sr_scpi_send_variadic(sdi->conn, format, args);
 143         va_end(args);
 144
 145         return ret;
 146 }
 147
 148 /* Start capturing a new frameset. */
 149 SR_PRIV int siglent_sds_capture_start(const struct sr_dev_inst *sdi)
 150 {
 151         struct dev_context *devc;
 152
 153         if (!(devc = sdi->priv))
 154                 return SR_ERR;
 155
 156         switch (devc->model->series->protocol) {
 157         case SPO_MODEL:
 158                 if (devc->data_source == DATA_SOURCE_SCREEN) {
 159                         char *buf;
 160                         int out;
 161
 162                         sr_dbg("Starting data capture for active frameset %" PRIu64 " of %" PRIu64,
 163                                 devc->num_frames + 1, devc->limit_frames);
 164                         if (siglent_sds_config_set(sdi, "ARM") != SR_OK)
 165                                 return SR_ERR;
 166                         if (sr_scpi_get_string(sdi->conn, ":INR?", &buf) != SR_OK)
 167                                 return SR_ERR;
 168                         sr_atoi(buf, &out);
 169                         if (out == DEVICE_STATE_TRIG_RDY) {
 170                                 siglent_sds_set_wait_event(devc, WAIT_TRIGGER);
 171                         } else if (out == DEVICE_STATE_TRIG_RDY + 1) {
 172                                 sr_spew("Device triggered.");
 173                                 siglent_sds_set_wait_event(devc, WAIT_BLOCK);
 174                                 return SR_OK;
 175                         } else {
 176                                 sr_spew("Device did not enter ARM mode.");
 177                                 return SR_ERR;
 178                         }
 179                 } else { /* TODO: Implement history retrieval. */
 180                         unsigned int framecount;
 181                         char buf[200];
 182                         int ret;
 183
 184                         sr_dbg("Starting data capture for history frameset.");
 185                         if (siglent_sds_config_set(sdi, "FPAR?") != SR_OK)
 186                                 return SR_ERR;
 187                         ret = sr_scpi_read_data(sdi->conn, buf, 200);
 188                         if (ret < 0) {
 189                                 sr_err("Read error while reading data header.");
 190                                 return SR_ERR;
 191                         }
 192                         memcpy(&framecount, buf + 40, 4);
 193                         if (devc->limit_frames > framecount)
 194                                 sr_err("Frame limit higher than frames in buffer of device!");
 195                         else if (devc->limit_frames == 0)
 196                                 devc->limit_frames = framecount;
 197                         sr_dbg("Starting data capture for history frameset %" PRIu64 " of %" PRIu64,
 198                                 devc->num_frames + 1, devc->limit_frames);
 199                         if (siglent_sds_config_set(sdi, "FRAM %i", devc->num_frames + 1) != SR_OK)
 200                                 return SR_ERR;
 201                         if (siglent_sds_channel_start(sdi) != SR_OK)
 202                                 return SR_ERR;
 203                         siglent_sds_set_wait_event(devc, WAIT_STOP);
 204                 }
 205                 break;
 206         case NON_SPO_MODEL:
 207                 siglent_sds_set_wait_event(devc, WAIT_TRIGGER);
 208                 break;
 209         }
 210
 211         return SR_OK;
 212 }
 213
 214 /* Start reading data from the current channel. */
 215 SR_PRIV int siglent_sds_channel_start(const struct sr_dev_inst *sdi)
 216 {
 217         struct dev_context *devc;
 218         struct sr_channel *ch;
 219
 220         if (!(devc = sdi->priv))
 221                 return SR_ERR;
 222
 223         ch = devc->channel_entry->data;
 224
 225         sr_dbg("Starting reading data from channel %d.", ch->index + 1);
 226
 227         switch (devc->model->series->protocol) {
 228         case NON_SPO_MODEL:
 229         case SPO_MODEL:
 230                 if (ch->type == SR_CHANNEL_LOGIC) {
 231                         if (sr_scpi_send(sdi->conn, "D%d:WF?",
 232                                 ch->index + 1) != SR_OK)
 233                                 return SR_ERR;
 234                 } else {
 235                         if (sr_scpi_send(sdi->conn, "C%d:WF? ALL",
 236                                 ch->index + 1) != SR_OK)
 237                                 return SR_ERR;
 238                 }
 239                 siglent_sds_set_wait_event(devc, WAIT_NONE);
 240                 break;
 241         }
 242
 243         siglent_sds_set_wait_event(devc, WAIT_BLOCK);
 244
 245         devc->num_channel_bytes = 0;
 246         devc->num_header_bytes = 0;
 247         devc->num_block_bytes = 0;
 248
 249         return SR_OK;
 250 }
 251
 252 /* Read the header of a data block. */
 253 static int siglent_sds_read_header(struct sr_dev_inst *sdi)
 254 {
 255         struct sr_scpi_dev_inst *scpi = sdi->conn;
 256         struct dev_context *devc = sdi->priv;
 257         char *buf = (char *)devc->buffer;
 258         int ret, desc_length;
 259         int block_offset = 15; /* Offset for descriptor block. */
 260         long dataLength = 0;
 261
 262         /* Read header from device. */
 263         ret = sr_scpi_read_data(scpi, buf + devc->num_header_bytes,
 264                 devc->model->series->buffer_samples);
 265         if (ret < 346) {
 266                 sr_err("Read error while reading data header.");
 267                 return SR_ERR;
 268         }
 269         sr_dbg("Device returned %i bytes.", ret);
 270         devc->num_header_bytes += ret;
 271         buf += block_offset; /* Skip to start descriptor block. */
 272
 273         /* Parse WaveDescriptor header. */
 274         memcpy(&desc_length, buf + 36, 4); /* Descriptor block length */
 275         memcpy(&dataLength, buf + 60, 4); /* Data block length */
 276
 277         devc->vdiv[channelIndex] = 2;
 278         devc->vert_offset[channelIndex] = 0;
 279         devc->block_header_size = desc_length + 15;
 280         ret = dataLength;
 281
 282         sr_dbg("Received data block header: '%s' -> block length %d.", buf, ret);
 283
 284         return ret;
 285 }
 286
 287 SR_PRIV int siglent_sds_receive(int fd, int revents, void *cb_data)
 288 {
 289         struct sr_dev_inst *sdi;
 290         struct sr_scpi_dev_inst *scpi;
 291         struct dev_context *devc;
 292         struct sr_datafeed_packet packet;
 293         struct sr_datafeed_analog analog;
 294         struct sr_analog_encoding encoding;
 295         struct sr_analog_meaning meaning;
 296         struct sr_analog_spec spec;
 297         struct sr_datafeed_logic logic;
 298         int len, i;
 299         struct sr_channel *ch;
 300         gsize expected_data_bytes = 0;
 301         char *memsize;
 302
 303         (void)fd;
 304
 305         if (!(sdi = cb_data))
 306                 return TRUE;
 307
 308         if (!(devc = sdi->priv))
 309                 return TRUE;
 310
 311         scpi = sdi->conn;
 312
 313         if (!(revents == G_IO_IN || revents == 0))
 314                 return TRUE;
 315
 316         memsize = NULL;
 317         if (sr_scpi_get_string(sdi->conn, "MSIZ?", &memsize) != SR_OK)
 318                 return SR_ERR;
 319
 320         switch (devc->wait_event) {
 321         case WAIT_NONE:
 322                 break;
 323         case WAIT_TRIGGER:
 324                 if (siglent_sds_trigger_wait(sdi) != SR_OK)
 325                         return TRUE;
 326                 if (siglent_sds_channel_start(sdi) != SR_OK)
 327                         return TRUE;
 328                 return TRUE;
 329         case WAIT_BLOCK:
 330                 if (siglent_sds_channel_start(sdi) != SR_OK)
 331                         return TRUE;
 332                 break;
 333         case WAIT_STOP:
 334                 if (siglent_sds_stop_wait(sdi) != SR_OK)
 335                         return TRUE;
 336                 if (siglent_sds_channel_start(sdi) != SR_OK)
 337                         return TRUE;
 338                 return TRUE;
 339         default:
 340                 sr_err("BUG: Unknown event target encountered.");
 341                 break;
 342         }
 343
 344         ch = devc->channel_entry->data;
 345
 346         if (devc->num_block_bytes == 0) {
 347
 348                 if (g_ascii_strcasecmp(memsize, "14M") == 0) {
 349                         sr_err("Device memory depth is set to 14Mpts, so please be patient.");
 350                         g_usleep(4900000); /* Sleep for large memory set. */
 351                 }
 352                 sr_dbg("New block header expected.");
 353                 len = siglent_sds_read_header(sdi);
 354                 expected_data_bytes = len;
 355                 if (len == 0)
 356                         /* Still reading the header. */
 357                         return TRUE;
 358                 if (len == -1) {
 359                         sr_err("Read error, aborting capture.");
 360                         packet.type = SR_DF_FRAME_END;
 361                         sr_session_send(sdi, &packet);
 362                         sdi->driver->dev_acquisition_stop(sdi);
 363                         return TRUE;
 364                 }
 365
 366                 if (devc->data_source == DATA_SOURCE_SCREEN
 367                         && (unsigned)len < expected_data_bytes) {
 368                         sr_dbg("Discarding short data block.");
 369                         sr_scpi_read_data(scpi, (char *)devc->buffer, len + 1);
 370                         return TRUE;
 371                 }
 372                 devc->num_block_bytes = len;
 373                 devc->num_block_read = 0;
 374         }
 375
 376         len = devc->num_block_bytes - devc->num_block_read;
 377         if (len > ACQ_BUFFER_SIZE)
 378                 len = ACQ_BUFFER_SIZE;
 379
 380         /* Offset the data block buffer past the IEEE header and description header. */
 381         devc->buffer += devc->block_header_size;
 382
 383         if (len == -1) {
 384                 sr_err("Read error, aborting capture.");
 385                 packet.type = SR_DF_FRAME_END;
 386                 sr_session_send(sdi, &packet);
 387                 sdi->driver->dev_acquisition_stop(sdi);
 388                 return TRUE;
 389         }
 390
 391         sr_dbg("Received %d bytes.", len);
 392
 393         devc->num_block_read += len;
 394
 395         if (ch->type == SR_CHANNEL_ANALOG) {
 396                 float vdiv = devc->vdiv[ch->index];
 397                 float offset = devc->vert_offset[ch->index];
 398                 GArray *float_data;
 399                 static GArray *data;
 400                 float voltage, vdivlog;
 401                 int digits;
 402
 403                 data = g_array_sized_new(FALSE, FALSE, sizeof(uint8_t), len);
 404                 g_array_append_vals(data, devc->buffer, len);
 405                 float_data = g_array_new(FALSE, FALSE, sizeof(float));
 406                 for (i = 0; i < len; i++) {
 407                         voltage = (float)g_array_index(data, int8_t, i) / 25;
 408                         voltage = ((vdiv * voltage) - offset);
 409                         g_array_append_val(float_data, voltage);
 410                 }
 411                 vdivlog = log10f(vdiv);
 412                 digits = -(int) vdivlog + (vdivlog < 0.0);
 413                 sr_analog_init(&analog, &encoding, &meaning, &spec, digits);
 414                 analog.meaning->channels = g_slist_append(NULL, ch);
 415                 analog.num_samples = float_data->len;
 416                 analog.data = (float *)float_data->data;
 417                 analog.meaning->mq = SR_MQ_VOLTAGE;
 418                 analog.meaning->unit = SR_UNIT_VOLT;
 419                 analog.meaning->mqflags = 0;
 420                 packet.type = SR_DF_ANALOG;
 421                 packet.payload = &analog;
 422                 sr_session_send(sdi, &packet);
 423                 g_slist_free(analog.meaning->channels);
 424                 g_array_free(data, TRUE);
 425         } else {
 426                 logic.length = len;
 427                 logic.unitsize = 1;
 428                 logic.data = devc->buffer;
 429                 packet.type = SR_DF_LOGIC;
 430                 packet.payload = &logic;
 431                 sr_session_send(sdi, &packet);
 432         }
 433
 434         if (devc->num_block_read == devc->num_block_bytes) {
 435                 sr_dbg("Block has been completed.");
 436                 sr_dbg("Preparing for possible next block.");
 437                 devc->num_header_bytes = 0;
 438                 devc->num_block_bytes = 0;
 439                 if (devc->data_source != DATA_SOURCE_SCREEN)
 440                         siglent_sds_set_wait_event(devc, WAIT_BLOCK);
 441                 if (!sr_scpi_read_complete(scpi)) {
 442                         sr_err("Read should have been completed.");
 443                         packet.type = SR_DF_FRAME_END;
 444                         sr_session_send(sdi, &packet);
 445                         sdi->driver->dev_acquisition_stop(sdi);
 446                         return TRUE;
 447                 }
 448                 devc->num_block_read = 0;
 449         } else {
 450                 sr_dbg("%" PRIu64 " of %" PRIu64 " block bytes read.",
 451                         devc->num_block_read, devc->num_block_bytes);
 452         }
 453         devc->num_channel_bytes += len;
 454         if (devc->num_channel_bytes < expected_data_bytes) {
 455                 /* Don't have the full data for this channel yet, re-run. */
 456                 return TRUE;
 457         }
 458         if (devc->channel_entry->next) {
 459                 /* We got the frame for this channel, now get the next channel. */
 460                 devc->channel_entry = devc->channel_entry->next;
 461                 siglent_sds_channel_start(sdi);
 462         } else {
 463                 /* Done with this frame. */
 464                 packet.type = SR_DF_FRAME_END;
 465                 sr_session_send(sdi, &packet);
 466
 467                 if (++devc->num_frames == devc->limit_frames) {
 468                         /* Last frame, stop capture. */
 469                         sdi->driver->dev_acquisition_stop(sdi);
 470                 } else {
 471                         /* Get the next frame, starting with the first channel. */
 472                         devc->channel_entry = devc->enabled_channels;
 473                         siglent_sds_capture_start(sdi);
 474
 475                         /* Start of next frame. */
 476                         packet.type = SR_DF_FRAME_BEGIN;
 477                         sr_session_send(sdi, &packet);
 478                 }
 479         }
 480
 481         return TRUE;
 482 }
 483
 484 SR_PRIV int siglent_sds_get_dev_cfg(const struct sr_dev_inst *sdi)
 485 {
 486         struct dev_context *devc;
 487         struct sr_channel *ch;
 488         char *cmd, *response;
 489         unsigned int i;
 490         int res, num_tokens;
 491         gchar **tokens;
 492
 493         devc = sdi->priv;
 494
 495         /* Analog channel state. */
 496         for (i = 0; i < devc->model->analog_channels; i++) {
 497                 cmd = g_strdup_printf("C%i:TRA?", i + 1);
 498                 res = sr_scpi_get_bool(sdi->conn, cmd, &devc->analog_channels[i]);
 499                 g_free(cmd);
 500                 if (res != SR_OK)
 501                         return SR_ERR;
 502                 ch = g_slist_nth_data(sdi->channels, i);
 503                 ch->enabled = devc->analog_channels[i];
 504         }
 505         sr_dbg("Current analog channel state:");
 506         for (i = 0; i < devc->model->analog_channels; i++)
 507                 sr_dbg("CH%d %s", i + 1, devc->analog_channels[i] ? "On" : "Off");
 508
 509         /* Digital channel state. */
 510         if (devc->model->has_digital) {
 511                 gboolean status;
 512
 513                 sr_dbg("Check logic analyzer channel state.");
 514                 devc->la_enabled = FALSE;
 515                 cmd = g_strdup_printf("DGST?");
 516                 res = sr_scpi_get_bool(sdi->conn, cmd, &status);
 517                 g_free(cmd);
 518                 if (res != SR_OK)
 519                         return SR_ERR;
 520                 sr_dbg("Logic analyzer status: %s", status ? "On" : "Off");
 521                 if (status) {
 522                         devc->la_enabled = TRUE;
 523                         for (i = 0; i < ARRAY_SIZE(devc->digital_channels); i++) {
 524                                 cmd = g_strdup_printf("D%i:DGCH?", i);
 525                                 res = sr_scpi_get_bool(sdi->conn, cmd, &devc->digital_channels[i]);
 526                                 g_free(cmd);
 527                                 if (res != SR_OK)
 528                                         return SR_ERR;
 529                                 ch = g_slist_nth_data(sdi->channels, i + devc->model->analog_channels);
 530                                 ch->enabled = devc->digital_channels[i];
 531                                 sr_dbg("D%d: %s", i, devc->digital_channels[i] ? "On" : "Off");
 532                         }
 533                 } else {
 534                         for (i = 0; i < ARRAY_SIZE(devc->digital_channels); i++) {
 535                                 ch = g_slist_nth_data(sdi->channels, i + devc->model->analog_channels);
 536                                 devc->digital_channels[i] = FALSE;
 537                                 ch->enabled = devc->digital_channels[i];
 538                                 sr_dbg("D%d: %s", i, devc->digital_channels[i] ? "On" : "Off");
 539                         }
 540                 }
 541         }
 542
 543         /* Timebase. */
 544         if (sr_scpi_get_float(sdi->conn, ":TDIV?", &devc->timebase) != SR_OK)
 545                 return SR_ERR;
 546         sr_dbg("Current timebase: %g.", devc->timebase);
 547
 548         /* Probe attenuation. */
 549         for (i = 0; i < devc->model->analog_channels; i++) {
 550                 cmd = g_strdup_printf("C%d:ATTN?", i + 1);
 551                 res = sr_scpi_get_float(sdi->conn, cmd, &devc->attenuation[i]);
 552                 g_free(cmd);
 553                 if (res != SR_OK)
 554                         return SR_ERR;
 555         }
 556         sr_dbg("Current probe attenuation:");
 557         for (i = 0; i < devc->model->analog_channels; i++)
 558                 sr_dbg("CH%d %g", i + 1, devc->attenuation[i]);
 559
 560         /* Vertical gain and offset. */
 561         if (siglent_sds_get_dev_cfg_vertical(sdi) != SR_OK)
 562                 return SR_ERR;
 563
 564         /* Coupling. */
 565         for (i = 0; i < devc->model->analog_channels; i++) {
 566                 cmd = g_strdup_printf("C%d:CPL?", i + 1);
 567                 res = sr_scpi_get_string(sdi->conn, cmd, &devc->coupling[i]);
 568                 g_free(cmd);
 569                 if (res != SR_OK)
 570                         return SR_ERR;
 571         }
 572
 573         sr_dbg("Current coupling:");
 574         for (i = 0; i < devc->model->analog_channels; i++)
 575                 sr_dbg("CH%d %s", i + 1, devc->coupling[i]);
 576
 577         /* Trigger source. */
 578         response = NULL;
 579         tokens = NULL;
 580         if (sr_scpi_get_string(sdi->conn, "TRSE?", &response) != SR_OK)
 581                 return SR_ERR;
 582         tokens = g_strsplit(response, ",", 0);
 583         for (num_tokens = 0; tokens[num_tokens] != NULL; num_tokens++);
 584         if (num_tokens < 4) {
 585                 sr_dbg("IDN response not according to spec: %80.s.", response);
 586                 g_strfreev(tokens);
 587                 g_free(response);
 588                 return SR_ERR_DATA;
 589         }
 590         g_free(response);
 591         devc->trigger_source = g_strstrip(g_strdup(tokens[2]));
 592         sr_dbg("Current trigger source: %s.", devc->trigger_source);
 593
 594         /* TODO: Horizontal trigger position. */
 595
 596         devc->horiz_triggerpos = 0;
 597         sr_dbg("Current horizontal trigger position: %g.", devc->horiz_triggerpos);
 598
 599         /* Trigger slope. */
 600         cmd = g_strdup_printf("%s:TRSL?", devc->trigger_source);
 601         res = sr_scpi_get_string(sdi->conn, cmd, &devc->trigger_slope);
 602         g_free(cmd);
 603         if (res != SR_OK)
 604                 return SR_ERR;
 605         sr_dbg("Current trigger slope: %s.", devc->trigger_slope);
 606
 607         /* Trigger level. */
 608         cmd = g_strdup_printf("%s:TRLV?", devc->trigger_source);
 609         res = sr_scpi_get_float(sdi->conn, cmd, &devc->trigger_level);
 610         g_free(cmd);
 611         if (res != SR_OK)
 612                 return SR_ERR;
 613         sr_dbg("Current trigger level: %g.", devc->trigger_level);
 614         return SR_OK;
 615 }
 616
 617 SR_PRIV int siglent_sds_get_dev_cfg_vertical(const struct sr_dev_inst *sdi)
 618 {
 619         struct dev_context *devc;
 620         char *cmd;
 621         unsigned int i;
 622         int res;
 623
 624         devc = sdi->priv;
 625
 626         /* Vertical gain. */
 627         for (i = 0; i < devc->model->analog_channels; i++) {
 628                 cmd = g_strdup_printf("C%d:VDIV?", i + 1);
 629                 res = sr_scpi_get_float(sdi->conn, cmd, &devc->vdiv[i]);
 630                 g_free(cmd);
 631                 if (res != SR_OK)
 632                         return SR_ERR;
 633         }
 634         sr_dbg("Current vertical gain:");
 635         for (i = 0; i < devc->model->analog_channels; i++)
 636                 sr_dbg("CH%d %g", i + 1, devc->vdiv[i]);
 637
 638         /* Vertical offset. */
 639         for (i = 0; i < devc->model->analog_channels; i++) {
 640                 cmd = g_strdup_printf("C%d:OFST?", i + 1);
 641                 res = sr_scpi_get_float(sdi->conn, cmd, &devc->vert_offset[i]);
 642                 g_free(cmd);
 643                 if (res != SR_OK)
 644                         return SR_ERR;
 645         }
 646         sr_dbg("Current vertical offset:");
 647         for (i = 0; i < devc->model->analog_channels; i++)
 648                 sr_dbg("CH%d %g", i + 1, devc->vert_offset[i]);
 649
 650         return SR_OK;
 651 }
 652
 653 SR_PRIV int siglent_sds_get_dev_cfg_horizontal(const struct sr_dev_inst *sdi)
 654 {
 655         struct dev_context *devc;
 656         char *cmd;
 657         int res;
 658         char *sample_points_string;
 659         float samplerate_scope, fvalue;
 660         char *first, *concat;
 661
 662         devc = sdi->priv;
 663         cmd = g_strdup_printf("SANU? C1");
 664         res = sr_scpi_get_string(sdi->conn, cmd, &sample_points_string);
 665         g_free(cmd);
 666         if (res != SR_OK)
 667                 return SR_ERR;
 668         if (g_strstr_len(sample_points_string, -1, "Mpts") != NULL) {
 669                 sample_points_string[strlen(sample_points_string) - 4] = '\0';
 670
 671                 if (g_strstr_len(sample_points_string, -1, ".") != NULL) {
 672                         first = strtok(sample_points_string, ".");
 673                         concat = strcat(first, strtok(NULL, "."));
 674                         if (sr_atof_ascii(concat, &fvalue) != SR_OK || fvalue == 0.0) {
 675                                 sr_dbg("Invalid float converted from scope response.");
 676                                 return SR_ERR;
 677                         }
 678                 } else {
 679                         if (sr_atof_ascii(sample_points_string, &fvalue) != SR_OK || fvalue == 0.0) {
 680                                 sr_dbg("Invalid float converted from scope response.");
 681                                 return SR_ERR;
 682                         }
 683                 }
 684                 samplerate_scope = fvalue * 100000;
 685         } else {
 686                 sample_points_string[strlen(sample_points_string) - 4] = '\0';
 687                 if (sr_atof_ascii(sample_points_string, &fvalue) != SR_OK || fvalue == 0.0) {
 688                         sr_dbg("Invalid float converted from scope response.");
 689                         return SR_ERR;
 690                 }
 691                 samplerate_scope = fvalue * 1000;
 692         }
 693         /* Get the timebase. */
 694         if (sr_scpi_get_float(sdi->conn, ":TDIV?", &devc->timebase) != SR_OK)
 695                 return SR_ERR;
 696         sr_dbg("Current timebase: %g.", devc->timebase);
 697         devc->samplerate = samplerate_scope / (devc->timebase * devc->model->series->num_horizontal_divs);
 698
 699         return SR_OK;
 700 }