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         const char *s;
 220
 221         if (!(devc = sdi->priv))
 222                 return SR_ERR;
 223
 224         ch = devc->channel_entry->data;
 225
 226         sr_dbg("Starting reading data from channel %d.", ch->index + 1);
 227
 228         switch (devc->model->series->protocol) {
 229         case NON_SPO_MODEL:
 230         case SPO_MODEL:
 231                 s = (ch->type == SR_CHANNEL_LOGIC) ? "D%d:WF?" : "C%d:WF? ALL";
 232                 if (sr_scpi_send(sdi->conn, s, ch->index + 1) != SR_OK)
 233                         return SR_ERR;
 234                 siglent_sds_set_wait_event(devc, WAIT_NONE);
 235                 break;
 236         }
 237
 238         siglent_sds_set_wait_event(devc, WAIT_BLOCK);
 239
 240         devc->num_channel_bytes = 0;
 241         devc->num_header_bytes = 0;
 242         devc->num_block_bytes = 0;
 243
 244         return SR_OK;
 245 }
 246
 247 /* Read the header of a data block. */
 248 static int siglent_sds_read_header(struct sr_dev_inst *sdi)
 249 {
 250         struct sr_scpi_dev_inst *scpi = sdi->conn;
 251         struct dev_context *devc = sdi->priv;
 252         char *buf = (char *)devc->buffer;
 253         int ret, desc_length;
 254         int block_offset = 15; /* Offset for descriptor block. */
 255         long data_length = 0;
 256
 257         /* Read header from device. */
 258         ret = sr_scpi_read_data(scpi, buf, SIGLENT_HEADER_SIZE);
 259         if (ret < SIGLENT_HEADER_SIZE) {
 260                 sr_err("Read error while reading data header.");
 261                 return SR_ERR;
 262         }
 263         sr_dbg("Device returned %i bytes.", ret);
 264         devc->num_header_bytes += ret;
 265         buf += block_offset; /* Skip to start descriptor block. */
 266
 267         /* Parse WaveDescriptor header. */
 268         memcpy(&desc_length, buf + 36, 4); /* Descriptor block length */
 269         memcpy(&data_length, buf + 60, 4); /* Data block length */
 270
 271         devc->block_header_size = desc_length + 15;
 272         devc->num_samples = data_length;
 273
 274         sr_dbg("Received data block header: '%s' -> block length %d.", buf, ret);
 275
 276         return ret;
 277 }
 278
 279 SR_PRIV int siglent_sds_receive(int fd, int revents, void *cb_data)
 280 {
 281         struct sr_dev_inst *sdi;
 282         struct sr_scpi_dev_inst *scpi;
 283         struct dev_context *devc;
 284         struct sr_datafeed_packet packet;
 285         struct sr_datafeed_analog analog;
 286         struct sr_analog_encoding encoding;
 287         struct sr_analog_meaning meaning;
 288         struct sr_analog_spec spec;
 289         struct sr_datafeed_logic logic;
 290         int len, i;
 291         struct sr_channel *ch;
 292
 293         (void)fd;
 294
 295         if (!(sdi = cb_data))
 296                 return TRUE;
 297
 298         if (!(devc = sdi->priv))
 299                 return TRUE;
 300
 301         scpi = sdi->conn;
 302
 303         if (!(revents == G_IO_IN || revents == 0))
 304                 return TRUE;
 305
 306         switch (devc->wait_event) {
 307         case WAIT_NONE:
 308                 break;
 309         case WAIT_TRIGGER:
 310                 if (siglent_sds_trigger_wait(sdi) != SR_OK)
 311                         return TRUE;
 312                 if (siglent_sds_channel_start(sdi) != SR_OK)
 313                         return TRUE;
 314                 return TRUE;
 315         case WAIT_BLOCK:
 316                 if (siglent_sds_channel_start(sdi) != SR_OK)
 317                         return TRUE;
 318                 break;
 319         case WAIT_STOP:
 320                 if (siglent_sds_stop_wait(sdi) != SR_OK)
 321                         return TRUE;
 322                 if (siglent_sds_channel_start(sdi) != SR_OK)
 323                         return TRUE;
 324                 return TRUE;
 325         default:
 326                 sr_err("BUG: Unknown event target encountered.");
 327                 break;
 328         }
 329         ch = devc->channel_entry->data;
 330         len = 0;
 331
 332         if (devc->num_block_bytes == 0) {
 333                 if (devc->memory_depth >= 14000000) {
 334                         sr_err("Device memory depth is set to 14Mpts, so please be patient.");
 335                         g_usleep(4900000); /* Sleep for large memory set. */
 336                 }
 337                 if (sr_scpi_read_begin(scpi) != SR_OK)
 338                         return TRUE;
 339                 sr_dbg("New block header expected.");
 340                 len = siglent_sds_read_header(sdi);
 341                 if (len == 0)
 342                         /* Still reading the header. */
 343                         return TRUE;
 344                 if (len == -1) {
 345                         sr_err("Read error, aborting capture.");
 346                         packet.type = SR_DF_FRAME_END;
 347                         sr_session_send(sdi, &packet);
 348                         sdi->driver->dev_acquisition_stop(sdi);
 349                         return TRUE;
 350                 }
 351                 devc->num_block_bytes = 0;
 352                 devc->num_block_read = 0;
 353         }
 354
 355         if (len == -1) {
 356                 sr_err("Read error, aborting capture.");
 357                 packet.type = SR_DF_FRAME_END;
 358                 sr_session_send(sdi, &packet);
 359                 sdi->driver->dev_acquisition_stop(sdi);
 360                 return TRUE;
 361         }
 362
 363         while (devc->num_block_bytes < devc->num_samples) {
 364                 len = sr_scpi_read_data(scpi, (char *)devc->buffer, devc->num_samples);
 365                 if (len == -1) {
 366                         sr_err("Read error, aborting capture.");
 367                         packet.type = SR_DF_FRAME_END;
 368                         sr_session_send(sdi, &packet);
 369                         sdi->driver->dev_acquisition_stop(sdi);
 370                         return TRUE;
 371                 }
 372                 devc->num_block_read += 1;
 373                 devc->num_block_bytes += len;
 374                 if (devc->num_block_bytes >= devc->num_samples ) {
 375                         /* Offset the data block buffer past the IEEE header and description header. */
 376                         devc->buffer += devc->block_header_size;
 377                         len = devc->num_samples;
 378                 }
 379                 sr_dbg("Received block: %i, %d bytes.", devc->num_block_read, len);
 380                 if (ch->type == SR_CHANNEL_ANALOG) {
 381                         float vdiv = devc->vdiv[ch->index];
 382                         float offset = devc->vert_offset[ch->index];
 383                         GArray *float_data;
 384                         static GArray *data;
 385                         float voltage, vdivlog;
 386                         int digits;
 387
 388                         data = g_array_sized_new(FALSE, FALSE, sizeof(uint8_t), len);
 389                         g_array_append_vals(data, devc->buffer, len);
 390                         float_data = g_array_new(FALSE, FALSE, sizeof(float));
 391                         for (i = 0; i < len; i++) {
 392                                 voltage = (float)g_array_index(data, int8_t, i) / 25;
 393                                 voltage = ((vdiv * voltage) - offset);
 394                                 g_array_append_val(float_data, voltage);
 395                         }
 396                         vdivlog = log10f(vdiv);
 397                         digits = -(int) vdivlog + (vdivlog < 0.0);
 398                         sr_analog_init(&analog, &encoding, &meaning, &spec, digits);
 399                         analog.meaning->channels = g_slist_append(NULL, ch);
 400                         analog.num_samples = float_data->len;
 401                         analog.data = (float *)float_data->data;
 402                         analog.meaning->mq = SR_MQ_VOLTAGE;
 403                         analog.meaning->unit = SR_UNIT_VOLT;
 404                         analog.meaning->mqflags = 0;
 405                         packet.type = SR_DF_ANALOG;
 406                         packet.payload = &analog;
 407                         sr_session_send(sdi, &packet);
 408                         g_slist_free(analog.meaning->channels);
 409                         g_array_free(data, TRUE);
 410                 } else {
 411                         logic.length = len;
 412                         logic.unitsize = 1;
 413                         logic.data = devc->buffer;
 414                         packet.type = SR_DF_LOGIC;
 415                         packet.payload = &logic;
 416                         sr_session_send(sdi, &packet);
 417                 }
 418
 419                 if (devc->num_samples == devc->num_block_bytes) {
 420                         sr_dbg("Transfer has been completed.");
 421                         devc->num_header_bytes = 0;
 422                         devc->num_block_bytes = 0;
 423                         if (!sr_scpi_read_complete(scpi)) {
 424                                 sr_err("Read should have been completed.");
 425                                 packet.type = SR_DF_FRAME_END;
 426                                 sr_session_send(sdi, &packet);
 427                                 sdi->driver->dev_acquisition_stop(sdi);
 428                                 return TRUE;
 429                         }
 430                         devc->num_block_read = 0;
 431                 } else {
 432                         sr_dbg("%" PRIu64 " of %" PRIu64 " block bytes read.",
 433                                 devc->num_block_bytes, devc->num_samples);
 434                 }
 435         }
 436
 437         if (devc->channel_entry->next) {
 438                 /* We got the frame for this channel, now get the next channel. */
 439                 devc->channel_entry = devc->channel_entry->next;
 440                 siglent_sds_channel_start(sdi);
 441         } else {
 442                 /* Done with this frame. */
 443                 packet.type = SR_DF_FRAME_END;
 444                 sr_session_send(sdi, &packet);
 445
 446                 if (++devc->num_frames == devc->limit_frames) {
 447                         /* Last frame, stop capture. */
 448                         sdi->driver->dev_acquisition_stop(sdi);
 449                 } else {
 450                         /* Get the next frame, starting with the first channel. */
 451                         devc->channel_entry = devc->enabled_channels;
 452                         siglent_sds_capture_start(sdi);
 453
 454                         /* Start of next frame. */
 455                         packet.type = SR_DF_FRAME_BEGIN;
 456                         sr_session_send(sdi, &packet);
 457                 }
 458         }
 459
 460         return TRUE;
 461 }
 462
 463 SR_PRIV int siglent_sds_get_dev_cfg(const struct sr_dev_inst *sdi)
 464 {
 465         struct dev_context *devc;
 466         struct sr_channel *ch;
 467         char *cmd, *response;
 468         unsigned int i;
 469         int res, num_tokens;
 470         gchar **tokens;
 471         int len;
 472         float trigger_pos;
 473
 474         devc = sdi->priv;
 475
 476         /* Analog channel state. */
 477         for (i = 0; i < devc->model->analog_channels; i++) {
 478                 cmd = g_strdup_printf("C%i:TRA?", i + 1);
 479                 res = sr_scpi_get_bool(sdi->conn, cmd, &devc->analog_channels[i]);
 480                 g_free(cmd);
 481                 if (res != SR_OK)
 482                         return SR_ERR;
 483                 ch = g_slist_nth_data(sdi->channels, i);
 484                 ch->enabled = devc->analog_channels[i];
 485         }
 486         sr_dbg("Current analog channel state:");
 487         for (i = 0; i < devc->model->analog_channels; i++)
 488                 sr_dbg("CH%d %s", i + 1, devc->analog_channels[i] ? "On" : "Off");
 489
 490         /* Digital channel state. */
 491         if (devc->model->has_digital) {
 492                 gboolean status;
 493
 494                 sr_dbg("Check logic analyzer channel state.");
 495                 devc->la_enabled = FALSE;
 496                 cmd = g_strdup_printf("DGST?");
 497                 res = sr_scpi_get_bool(sdi->conn, cmd, &status);
 498                 g_free(cmd);
 499                 if (res != SR_OK)
 500                         return SR_ERR;
 501                 sr_dbg("Logic analyzer status: %s", status ? "On" : "Off");
 502                 if (status) {
 503                         devc->la_enabled = TRUE;
 504                         for (i = 0; i < ARRAY_SIZE(devc->digital_channels); i++) {
 505                                 cmd = g_strdup_printf("D%i:DGCH?", i);
 506                                 res = sr_scpi_get_bool(sdi->conn, cmd, &devc->digital_channels[i]);
 507                                 g_free(cmd);
 508                                 if (res != SR_OK)
 509                                         return SR_ERR;
 510                                 ch = g_slist_nth_data(sdi->channels, i + devc->model->analog_channels);
 511                                 ch->enabled = devc->digital_channels[i];
 512                                 sr_dbg("D%d: %s", i, devc->digital_channels[i] ? "On" : "Off");
 513                         }
 514                 } else {
 515                         for (i = 0; i < ARRAY_SIZE(devc->digital_channels); i++) {
 516                                 ch = g_slist_nth_data(sdi->channels, i + devc->model->analog_channels);
 517                                 devc->digital_channels[i] = FALSE;
 518                                 ch->enabled = devc->digital_channels[i];
 519                                 sr_dbg("D%d: %s", i, devc->digital_channels[i] ? "On" : "Off");
 520                         }
 521                 }
 522         }
 523
 524         /* Timebase. */
 525         if (sr_scpi_get_float(sdi->conn, ":TDIV?", &devc->timebase) != SR_OK)
 526                 return SR_ERR;
 527         sr_dbg("Current timebase: %g.", devc->timebase);
 528
 529         /* Probe attenuation. */
 530         for (i = 0; i < devc->model->analog_channels; i++) {
 531                 cmd = g_strdup_printf("C%d:ATTN?", i + 1);
 532                 res = sr_scpi_get_float(sdi->conn, cmd, &devc->attenuation[i]);
 533                 g_free(cmd);
 534                 if (res != SR_OK)
 535                         return SR_ERR;
 536         }
 537         sr_dbg("Current probe attenuation:");
 538         for (i = 0; i < devc->model->analog_channels; i++)
 539                 sr_dbg("CH%d %g", i + 1, devc->attenuation[i]);
 540
 541         /* Vertical gain and offset. */
 542         if (siglent_sds_get_dev_cfg_vertical(sdi) != SR_OK)
 543                 return SR_ERR;
 544
 545         /* Coupling. */
 546         for (i = 0; i < devc->model->analog_channels; i++) {
 547                 cmd = g_strdup_printf("C%d:CPL?", i + 1);
 548                 res = sr_scpi_get_string(sdi->conn, cmd, &devc->coupling[i]);
 549                 g_free(cmd);
 550                 if (res != SR_OK)
 551                         return SR_ERR;
 552         }
 553
 554         sr_dbg("Current coupling:");
 555         for (i = 0; i < devc->model->analog_channels; i++)
 556                 sr_dbg("CH%d %s", i + 1, devc->coupling[i]);
 557
 558         /* Trigger source. */
 559         response = NULL;
 560         tokens = NULL;
 561         if (sr_scpi_get_string(sdi->conn, "TRSE?", &response) != SR_OK)
 562                 return SR_ERR;
 563         tokens = g_strsplit(response, ",", 0);
 564         for (num_tokens = 0; tokens[num_tokens] != NULL; num_tokens++);
 565         if (num_tokens < 4) {
 566                 sr_dbg("IDN response not according to spec: %80.s.", response);
 567                 g_strfreev(tokens);
 568                 g_free(response);
 569                 return SR_ERR_DATA;
 570         }
 571         g_free(response);
 572         devc->trigger_source = g_strstrip(g_strdup(tokens[2]));
 573         sr_dbg("Current trigger source: %s.", devc->trigger_source);
 574
 575         /* TODO: Horizontal trigger position. */
 576         response = "";
 577         trigger_pos = 0;
 578         if (sr_scpi_get_string(sdi->conn, g_strdup_printf("%s:TRDL?", devc->trigger_source), &response) != SR_OK)
 579                 return SR_ERR;
 580         len = strlen(response);
 581         if (!g_ascii_strcasecmp(response + (len - 2), "us")) {
 582                 trigger_pos = atof(response) / SR_GHZ(1);
 583                 sr_dbg("Current trigger position us %s.", response);
 584         } else if (!g_ascii_strcasecmp(response + (len - 2), "ns")) {
 585                 trigger_pos = atof(response) / SR_MHZ(1);
 586                 sr_dbg("Current trigger position ms %s.", response);
 587         } else if (!g_ascii_strcasecmp(response + (len - 2), "ms")) {
 588                 trigger_pos = atof(response) / SR_KHZ(1);
 589                 sr_dbg("Current trigger position ns %s.", response);
 590         } else if (!g_ascii_strcasecmp(response + (len - 2), "s")) {
 591                 trigger_pos = atof(response);
 592                 sr_dbg("Current trigger position s %s.", response);
 593         };
 594         devc->horiz_triggerpos = trigger_pos;
 595
 596         sr_dbg("Current horizontal trigger position %.10f", devc->horiz_triggerpos);
 597
 598         /* Trigger slope. */
 599         cmd = g_strdup_printf("%s:TRSL?", devc->trigger_source);
 600         res = sr_scpi_get_string(sdi->conn, cmd, &devc->trigger_slope);
 601         g_free(cmd);
 602         if (res != SR_OK)
 603                 return SR_ERR;
 604         sr_dbg("Current trigger slope: %s.", devc->trigger_slope);
 605
 606         /* Trigger level. */
 607         cmd = g_strdup_printf("%s:TRLV?", devc->trigger_source);
 608         res = sr_scpi_get_float(sdi->conn, cmd, &devc->trigger_level);
 609         g_free(cmd);
 610         if (res != SR_OK)
 611                 return SR_ERR;
 612         sr_dbg("Current trigger level: %g.", devc->trigger_level);
 613         return SR_OK;
 614 }
 615
 616 SR_PRIV int siglent_sds_get_dev_cfg_vertical(const struct sr_dev_inst *sdi)
 617 {
 618         struct dev_context *devc;
 619         char *cmd;
 620         unsigned int i;
 621         int res;
 622
 623         devc = sdi->priv;
 624
 625         /* Vertical gain. */
 626         for (i = 0; i < devc->model->analog_channels; i++) {
 627                 cmd = g_strdup_printf("C%d:VDIV?", i + 1);
 628                 res = sr_scpi_get_float(sdi->conn, cmd, &devc->vdiv[i]);
 629                 g_free(cmd);
 630                 if (res != SR_OK)
 631                         return SR_ERR;
 632         }
 633         sr_dbg("Current vertical gain:");
 634         for (i = 0; i < devc->model->analog_channels; i++)
 635                 sr_dbg("CH%d %g", i + 1, devc->vdiv[i]);
 636
 637         /* Vertical offset. */
 638         for (i = 0; i < devc->model->analog_channels; i++) {
 639                 cmd = g_strdup_printf("C%d:OFST?", i + 1);
 640                 res = sr_scpi_get_float(sdi->conn, cmd, &devc->vert_offset[i]);
 641                 g_free(cmd);
 642                 if (res != SR_OK)
 643                         return SR_ERR;
 644         }
 645         sr_dbg("Current vertical offset:");
 646         for (i = 0; i < devc->model->analog_channels; i++)
 647                 sr_dbg("CH%d %g", i + 1, devc->vert_offset[i]);
 648
 649         return SR_OK;
 650 }
 651
 652 SR_PRIV int siglent_sds_get_dev_cfg_horizontal(const struct sr_dev_inst *sdi)
 653 {
 654         struct dev_context *devc;
 655         char *cmd;
 656         int res;
 657         char *sample_points_string;
 658         float samplerate_scope, fvalue;
 659
 660         devc = sdi->priv;
 661         cmd = g_strdup_printf("SANU? C1");
 662         res = sr_scpi_get_string(sdi->conn, cmd, &sample_points_string);
 663         g_free(cmd);
 664         samplerate_scope = 0;
 665         fvalue = 0;
 666         if (res != SR_OK)
 667                 return SR_ERR;
 668
 669         if (g_strstr_len(sample_points_string, -1, "Mpts") != NULL) {
 670                 sample_points_string[strlen(sample_points_string) -4] = '\0';
 671                 if (sr_atof_ascii(sample_points_string, &fvalue) != SR_OK) {
 672                         sr_dbg("Invalid float converted from scope response.");
 673                         return SR_ERR;
 674                 }
 675                 samplerate_scope = fvalue * 1000000;
 676         } else if (g_strstr_len(sample_points_string, -1, "Kpts") != NULL){
 677                 sample_points_string[strlen(sample_points_string) -4] = '\0';
 678                 if (sr_atof_ascii(sample_points_string, &fvalue) != SR_OK) {
 679                         sr_dbg("Invalid float converted from scope response.");
 680                         return SR_ERR;
 681                 }
 682                 samplerate_scope = fvalue * 10000;
 683         } else {
 684                 samplerate_scope = fvalue;
 685         }
 686         g_free(sample_points_string);
 687         /* Get the timebase. */
 688         if (sr_scpi_get_float(sdi->conn, ":TDIV?", &devc->timebase) != SR_OK)
 689                 return SR_ERR;
 690         sr_dbg("Current timebase: %g.", devc->timebase);
 691         devc->samplerate = samplerate_scope / (devc->timebase * devc->model->series->num_horizontal_divs);
 692         devc->memory_depth = samplerate_scope;
 693         return SR_OK;
 694 }