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