X-Git-Url: https://sigrok.org/gitweb/?a=blobdiff_plain;f=hardware%2Frigol-ds%2Fprotocol.c;h=833104e890ddac4c74645a474b1a9077a011ffee;hb=HEAD;hp=cd460e9f483b47c2d14e154731c79576871c01d6;hpb=56868b5d6b7401f3916df1468b537bd0d04087f5;p=libsigrok.git diff --git a/hardware/rigol-ds/protocol.c b/hardware/rigol-ds/protocol.c deleted file mode 100644 index cd460e9f..00000000 --- a/hardware/rigol-ds/protocol.c +++ /dev/null @@ -1,767 +0,0 @@ -/* - * This file is part of the libsigrok project. - * - * Copyright (C) 2012 Martin Ling - * Copyright (C) 2013 Bert Vermeulen - * Copyright (C) 2013 Mathias Grimmberger - * - * This program is free software: you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation, either version 3 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program. If not, see . - */ - -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include "libsigrok.h" -#include "libsigrok-internal.h" -#include "protocol.h" - -/* - * This is a unified protocol driver for the DS1000 and DS2000 series. - * - * DS1000 support tested with a Rigol DS1102D. - * - * DS2000 support tested with a Rigol DS2072 using firmware version 01.01.00.02. - * - * The Rigol DS2000 series scopes try to adhere to the IEEE 488.2 (I think) - * standard. If you want to read it - it costs real money... - * - * Every response from the scope has a linefeed appended because the - * standard says so. In principle this could be ignored because sending the - * next command clears the output queue of the scope. This driver tries to - * avoid doing that because it may cause an error being generated inside the - * scope and who knows what bugs the firmware has WRT this. - * - * Waveform data is transferred in a format called "arbitrary block program - * data" specified in IEEE 488.2. See Agilents programming manuals for their - * 2000/3000 series scopes for a nice description. - * - * Each data block from the scope has a header, e.g. "#900000001400". - * The '#' marks the start of a block. - * Next is one ASCII decimal digit between 1 and 9, this gives the number of - * ASCII decimal digits following. - * Last are the ASCII decimal digits giving the number of bytes (not - * samples!) in the block. - * - * After this header as many data bytes as indicated follow. - * - * Each data block has a trailing linefeed too. - */ - -static int get_cfg(const struct sr_dev_inst *sdi, char *cmd, char *reply, size_t maxlen); -static int get_cfg_int(const struct sr_dev_inst *sdi, char *cmd, int *i); - -static int parse_int(const char *str, int *ret) -{ - char *e; - long tmp; - - errno = 0; - tmp = strtol(str, &e, 10); - if (e == str || *e != '\0') { - sr_dbg("Failed to parse integer: '%s'", str); - return SR_ERR; - } - if (errno) { - sr_dbg("Failed to parse integer: '%s', numerical overflow", str); - return SR_ERR; - } - if (tmp > INT_MAX || tmp < INT_MIN) { - sr_dbg("Failed to parse integer: '%s', value to large/small", str); - return SR_ERR; - } - - *ret = (int)tmp; - return SR_OK; -} - -/* Set the next event to wait for in rigol_ds_receive */ -static void rigol_ds_set_wait_event(struct dev_context *devc, enum wait_events event) -{ - if (event == WAIT_STOP) - devc->wait_status = 2; - else - devc->wait_status = 1; - devc->wait_event = event; -} - -/* - * Waiting for a event will return a timeout after 2 to 3 seconds in order - * to not block the application. - */ -static int rigol_ds_event_wait(const struct sr_dev_inst *sdi, char status1, char status2) -{ - char buf[20]; - struct dev_context *devc; - time_t start; - - if (!(devc = sdi->priv)) - return SR_ERR; - - start = time(NULL); - - /* - * Trigger status may return: - * "TD" or "T'D" - triggered - * "AUTO" - autotriggered - * "RUN" - running - * "WAIT" - waiting for trigger - * "STOP" - stopped - */ - - if (devc->wait_status == 1) { - do { - if (time(NULL) - start >= 3) { - sr_dbg("Timeout waiting for trigger"); - return SR_ERR_TIMEOUT; - } - - if (get_cfg(sdi, ":TRIG:STAT?", buf, sizeof(buf)) != SR_OK) - return SR_ERR; - } while (buf[0] == status1 || buf[0] == status2); - - devc->wait_status = 2; - } - if (devc->wait_status == 2) { - do { - if (time(NULL) - start >= 3) { - sr_dbg("Timeout waiting for trigger"); - return SR_ERR_TIMEOUT; - } - - if (get_cfg(sdi, ":TRIG:STAT?", buf, sizeof(buf)) != SR_OK) - return SR_ERR; - } while (buf[0] != status1 && buf[0] != status2); - - rigol_ds_set_wait_event(devc, WAIT_NONE); - } - - return SR_OK; -} - -/* - * For live capture we need to wait for a new trigger event to ensure that - * sample data is not returned twice. - * - * Unfortunately this will never really work because for sufficiently fast - * timebases and trigger rates it just can't catch the status changes. - * - * What would be needed is a trigger event register with autoreset like the - * Agilents have. The Rigols don't seem to have anything like this. - * - * The workaround is to only wait for the trigger when the timebase is slow - * enough. Of course this means that for faster timebases sample data can be - * returned multiple times, this effect is mitigated somewhat by sleeping - * for about one sweep time in that case. - */ -static int rigol_ds_trigger_wait(const struct sr_dev_inst *sdi) -{ - struct dev_context *devc; - long s; - - if (!(devc = sdi->priv)) - return SR_ERR; - - /* - * If timebase < 50 msecs/DIV just sleep about one sweep time except - * for really fast sweeps. - */ - if (devc->timebase < 0.0499) - { - if (devc->timebase > 0.99e-6) { - /* - * Timebase * num hor. divs * 85(%) * 1e6(usecs) / 100 - * -> 85 percent of sweep time - */ - s = (devc->timebase * devc->model->num_horizontal_divs - * 85e6) / 100L; - sr_spew("Sleeping for %ld usecs instead of trigger-wait", s); - g_usleep(s); - } - rigol_ds_set_wait_event(devc, WAIT_NONE); - return SR_OK; - } else { - return rigol_ds_event_wait(sdi, 'T', 'A'); - } -} - -/* Wait for scope to got to "Stop" in single shot mode */ -static int rigol_ds_stop_wait(const struct sr_dev_inst *sdi) -{ - return rigol_ds_event_wait(sdi, 'S', 'S'); -} - -/* Check that a single shot acquisition actually succeeded on the DS2000 */ -static int rigol_ds_check_stop(const struct sr_dev_inst *sdi) -{ - struct dev_context *devc; - int tmp; - - if (!(devc = sdi->priv)) - return SR_ERR; - - if (sr_scpi_send(sdi->conn, ":WAV:SOUR CHAN%d", - devc->channel_frame->index + 1) != SR_OK) - return SR_ERR; - /* Check that the number of samples will be accepted */ - if (sr_scpi_send(sdi->conn, ":WAV:POIN %d;*OPC", devc->analog_frame_size) != SR_OK) - return SR_ERR; - if (get_cfg_int(sdi, "*ESR?", &tmp) != SR_OK) - return SR_ERR; - /* - * If we get an "Execution error" the scope went from "Single" to - * "Stop" without actually triggering. There is no waveform - * displayed and trying to download one will fail - the scope thinks - * it has 1400 samples (like display memory) and the driver thinks - * it has a different number of samples. - * - * In that case just try to capture something again. Might still - * fail in interesting ways. - * - * Ain't firmware fun? - */ - if (tmp & 0x10) { - sr_warn("Single shot acquisition failed, retrying..."); - /* Sleep a bit, otherwise the single shot will often fail */ - g_usleep(500000); - sr_scpi_send(sdi->conn, ":SING"); - rigol_ds_set_wait_event(devc, WAIT_STOP); - return SR_ERR; - } - - return SR_OK; -} - -/* Wait for enough data becoming available in scope output buffer */ -static int rigol_ds_block_wait(const struct sr_dev_inst *sdi) -{ - char buf[30]; - struct dev_context *devc; - time_t start; - int len; - - if (!(devc = sdi->priv)) - return SR_ERR; - - start = time(NULL); - - do { - if (time(NULL) - start >= 3) { - sr_dbg("Timeout waiting for data block"); - return SR_ERR_TIMEOUT; - } - - /* - * The scope copies data really slowly from sample - * memory to its output buffer, so try not to bother - * it too much with SCPI requests but don't wait too - * long for short sample frame sizes. - */ - g_usleep(devc->analog_frame_size < 15000 ? 100000 : 1000000); - - /* "READ,nnnn" (still working) or "IDLE,nnnn" (finished) */ - if (get_cfg(sdi, ":WAV:STAT?", buf, sizeof(buf)) != SR_OK) - return SR_ERR; - - if (parse_int(buf + 5, &len) != SR_OK) - return SR_ERR; - } while (buf[0] == 'R' && len < 1000000); - - rigol_ds_set_wait_event(devc, WAIT_NONE); - - return SR_OK; -} - -/* Start capturing a new frameset */ -SR_PRIV int rigol_ds_capture_start(const struct sr_dev_inst *sdi) -{ - struct dev_context *devc; - - if (!(devc = sdi->priv)) - return SR_ERR; - - sr_dbg("Starting data capture for frameset %lu of %lu", - devc->num_frames + 1, devc->limit_frames); - - if (sr_scpi_send(sdi->conn, ":WAV:FORM BYTE") != SR_OK) - return SR_ERR; - if (devc->data_source == DATA_SOURCE_LIVE) { - if (sr_scpi_send(sdi->conn, ":WAV:MODE NORM") != SR_OK) - return SR_ERR; - rigol_ds_set_wait_event(devc, WAIT_TRIGGER); - } else { - if (sr_scpi_send(sdi->conn, ":WAV:MODE RAW") != SR_OK) - return SR_ERR; - if (sr_scpi_send(sdi->conn, ":SING", devc->analog_frame_size) != SR_OK) - return SR_ERR; - rigol_ds_set_wait_event(devc, WAIT_STOP); - } - - return SR_OK; -} - -/* Start reading data from the current channel */ -SR_PRIV int rigol_ds_channel_start(const struct sr_dev_inst *sdi) -{ - struct dev_context *devc; - - if (!(devc = sdi->priv)) - return SR_ERR; - - sr_dbg("Starting reading data from channel %d", - devc->channel_frame->index + 1); - - if (sr_scpi_send(sdi->conn, ":WAV:SOUR CHAN%d", - devc->channel_frame->index + 1) != SR_OK) - return SR_ERR; - if (devc->data_source != DATA_SOURCE_LIVE) { - if (sr_scpi_send(sdi->conn, ":WAV:RES") != SR_OK) - return SR_ERR; - if (sr_scpi_send(sdi->conn, ":WAV:BEG") != SR_OK) - return SR_ERR; - rigol_ds_set_wait_event(devc, WAIT_BLOCK); - } else - rigol_ds_set_wait_event(devc, WAIT_NONE); - - devc->num_frame_bytes = 0; - devc->num_block_bytes = 0; - - return SR_OK; -} - -/* Read the header of a data block */ -static int rigol_ds_read_header(struct sr_scpi_dev_inst *scpi) -{ - char start[3], length[10]; - int len, tmp; - - /* Read the hashsign and length digit. */ - tmp = sr_scpi_read(scpi, start, 2); - start[2] = '\0'; - if (tmp != 2) - { - sr_err("Failed to read first two bytes of data block header."); - return -1; - } - if (start[0] != '#' || !isdigit(start[1]) || start[1] == '0') - { - sr_err("Received invalid data block header start '%s'.", start); - return -1; - } - len = atoi(start + 1); - - /* Read the data length. */ - tmp = sr_scpi_read(scpi, length, len); - length[len] = '\0'; - if (tmp != len) - { - sr_err("Failed to read %d bytes of data block length.", len); - return -1; - } - if (parse_int(length, &len) != SR_OK) - { - sr_err("Received invalid data block length '%s'.", length); - return -1; - } - - sr_dbg("Received data block header: %s%s -> block length %d", start, length, len); - - return len; -} - -SR_PRIV int rigol_ds_receive(int fd, int revents, void *cb_data) -{ - struct sr_dev_inst *sdi; - struct sr_scpi_dev_inst *scpi; - struct dev_context *devc; - struct sr_datafeed_packet packet; - struct sr_datafeed_analog analog; - struct sr_datafeed_logic logic; - double vdiv, offset; - int len, i, waveform_size, vref; - struct sr_probe *probe; - - (void)fd; - - if (!(sdi = cb_data)) - return TRUE; - - if (!(devc = sdi->priv)) - return TRUE; - - scpi = sdi->conn; - - if (revents == G_IO_IN) { - if (devc->model->protocol == PROTOCOL_IEEE488_2) { - switch(devc->wait_event) { - case WAIT_NONE: - break; - - case WAIT_TRIGGER: - if (rigol_ds_trigger_wait(sdi) != SR_OK) - return TRUE; - if (rigol_ds_channel_start(sdi) != SR_OK) - return TRUE; - break; - - case WAIT_BLOCK: - if (rigol_ds_block_wait(sdi) != SR_OK) - return TRUE; - break; - - case WAIT_STOP: - if (rigol_ds_stop_wait(sdi) != SR_OK) - return TRUE; - if (rigol_ds_check_stop(sdi) != SR_OK) - return TRUE; - if (rigol_ds_channel_start(sdi) != SR_OK) - return TRUE; - return TRUE; - - default: - sr_err("BUG: Unknown event target encountered"); - } - - if (devc->num_block_bytes == 0) { - sr_dbg("New block header expected"); - if (sr_scpi_send(sdi->conn, ":WAV:DATA?") != SR_OK) - return TRUE; - len = rigol_ds_read_header(scpi); - if (len == -1) - return TRUE; - /* At slow timebases in live capture the DS2072 - * sometimes returns "short" data blocks, with - * apparently no way to get the rest of the data. - * Discard these, the complete data block will - * appear eventually. - */ - if (devc->data_source == DATA_SOURCE_LIVE - && (unsigned)len < devc->num_frame_bytes) { - sr_dbg("Discarding short data block"); - sr_scpi_read(scpi, (char *)devc->buffer, len + 1); - return TRUE; - } - devc->num_block_bytes = len; - devc->num_block_read = 0; - } - } - - probe = devc->channel_frame; - if (devc->model->protocol == PROTOCOL_IEEE488_2) { - len = devc->num_block_bytes - devc->num_block_read; - len = sr_scpi_read(scpi, (char *)devc->buffer, - len < ACQ_BUFFER_SIZE ? len : ACQ_BUFFER_SIZE); - } else { - waveform_size = probe->type == SR_PROBE_ANALOG ? - DS1000_ANALOG_LIVE_WAVEFORM_SIZE : DIGITAL_WAVEFORM_SIZE; - len = sr_scpi_read(scpi, (char *)devc->buffer, - waveform_size - devc->num_frame_bytes); - } - sr_dbg("Received %d bytes.", len); - if (len == -1) - return TRUE; - - if (devc->num_frame_bytes == 0) { - /* Start of a new frame. */ - packet.type = SR_DF_FRAME_BEGIN; - sr_session_send(sdi, &packet); - } - - if (probe->type == SR_PROBE_ANALOG) { - if (devc->model->protocol == PROTOCOL_IEEE488_2) - devc->num_block_read += len; - vref = devc->vert_reference[probe->index]; - vdiv = devc->vdiv[probe->index] / 25.6; - offset = devc->vert_offset[probe->index]; - if (devc->model->protocol == PROTOCOL_IEEE488_2) - for (i = 0; i < len; i++) - devc->data[i] = ((int)devc->buffer[i] - vref) * vdiv - offset; - else - for (i = 0; i < len; i++) - devc->data[i] = (128 - devc->buffer[i]) * vdiv - offset; - analog.probes = g_slist_append(NULL, probe); - analog.num_samples = len; - analog.data = devc->data; - analog.mq = SR_MQ_VOLTAGE; - analog.unit = SR_UNIT_VOLT; - analog.mqflags = 0; - packet.type = SR_DF_ANALOG; - packet.payload = &analog; - sr_session_send(cb_data, &packet); - g_slist_free(analog.probes); - - if (devc->model->protocol == PROTOCOL_IEEE488_2) { - if (devc->num_block_read == devc->num_block_bytes) { - sr_dbg("Block has been completed"); - /* Discard the terminating linefeed and prepare for - possible next block */ - sr_scpi_read(scpi, (char *)devc->buffer, 1); - devc->num_block_bytes = 0; - if (devc->data_source != DATA_SOURCE_LIVE) - rigol_ds_set_wait_event(devc, WAIT_BLOCK); - } else - sr_dbg("%d of %d block bytes read", devc->num_block_read, devc->num_block_bytes); - } - - devc->num_frame_bytes += len; - - if (devc->num_frame_bytes < devc->analog_frame_size) - /* Don't have the whole frame yet. */ - return TRUE; - - sr_dbg("Frame completed, %d samples", devc->num_frame_bytes); - } else { - logic.length = len - 10; - logic.unitsize = 2; - logic.data = devc->buffer + 10; - packet.type = SR_DF_LOGIC; - packet.payload = &logic; - sr_session_send(cb_data, &packet); - - if (len != DIGITAL_WAVEFORM_SIZE) - /* Don't have the whole frame yet. */ - return TRUE; - } - - /* End of the frame. */ - packet.type = SR_DF_FRAME_END; - sr_session_send(sdi, &packet); - if (devc->model->protocol == PROTOCOL_LEGACY) - devc->num_frame_bytes = 0; - else { - /* Signal end of data download to scope */ - if (devc->data_source != DATA_SOURCE_LIVE) - /* - * This causes a query error, without it switching - * to the next channel causes an error. Fun with - * firmware... - */ - sr_scpi_send(sdi->conn, ":WAV:END"); - } - - if (devc->enabled_analog_probes - && devc->channel_frame == devc->enabled_analog_probes->data - && devc->enabled_analog_probes->next != NULL) { - /* We got the frame for the first analog channel, but - * there's a second analog channel. */ - devc->channel_frame = devc->enabled_analog_probes->next->data; - if (devc->model->protocol == PROTOCOL_IEEE488_2) { - rigol_ds_channel_start(sdi); - } else { - sr_scpi_send(sdi->conn, ":WAV:DATA? CHAN%c", - devc->channel_frame->name[2]); - } - } else { - /* Done with both analog channels in this frame. */ - if (devc->enabled_digital_probes - && devc->channel_frame != devc->enabled_digital_probes->data) { - /* Now we need to get the digital data. */ - devc->channel_frame = devc->enabled_digital_probes->data; - sr_scpi_send(sdi->conn, ":WAV:DATA? DIG"); - } else if (++devc->num_frames == devc->limit_frames) { - /* End of last frame. */ - packet.type = SR_DF_END; - sr_session_send(sdi, &packet); - sdi->driver->dev_acquisition_stop(sdi, cb_data); - } else { - /* Get the next frame, starting with the first analog channel. */ - if (devc->model->protocol == PROTOCOL_IEEE488_2) { - if (devc->enabled_analog_probes) { - devc->channel_frame = devc->enabled_analog_probes->data; - rigol_ds_capture_start(sdi); - } - } else { - if (devc->enabled_analog_probes) { - devc->channel_frame = devc->enabled_analog_probes->data; - sr_scpi_send(sdi->conn, ":WAV:DATA? CHAN%c", - devc->channel_frame->name[2]); - } else { - devc->channel_frame = devc->enabled_digital_probes->data; - sr_scpi_send(sdi->conn, ":WAV:DATA? DIG"); - } - } - } - } - } - - return TRUE; -} - -static int get_cfg(const struct sr_dev_inst *sdi, char *cmd, char *reply, size_t maxlen) -{ - int len; - struct dev_context *devc = sdi->priv; - struct sr_scpi_dev_inst *scpi = sdi->conn; - char *response; - - if (sr_scpi_send(scpi, cmd) != SR_OK) - return SR_ERR; - - if (sr_scpi_receive(scpi, &response) != SR_OK) - return SR_ERR; - - g_strlcpy(reply, response, maxlen); - g_free(response); - len = strlen(reply); - - if (devc->model->protocol == PROTOCOL_IEEE488_2) { - /* get rid of trailing linefeed */ - if (len >= 1 && reply[len-1] == '\n') - reply[len-1] = '\0'; - } - - sr_spew("Received '%s'.", reply); - - return SR_OK; -} - -static int get_cfg_int(const struct sr_dev_inst *sdi, char *cmd, int *i) -{ - char buf[32]; - - if (get_cfg(sdi, cmd, buf, sizeof(buf)) != SR_OK) - return SR_ERR; - - if (parse_int(buf, i) != SR_OK) - return SR_ERR; - - return SR_OK; -} - -static int get_cfg_float(const struct sr_dev_inst *sdi, char *cmd, float *f) -{ - char buf[32], *e; - - if (get_cfg(sdi, cmd, buf, sizeof(buf)) != SR_OK) - return SR_ERR; - *f = strtof(buf, &e); - if (e == buf || (fpclassify(*f) & (FP_ZERO | FP_NORMAL)) == 0) { - sr_dbg("failed to parse response to '%s': '%s'", cmd, buf); - return SR_ERR; - } - - return SR_OK; -} - -static int get_cfg_string(const struct sr_dev_inst *sdi, char *cmd, char **buf) -{ - if (!(*buf = g_try_malloc0(256))) - return SR_ERR_MALLOC; - - if (get_cfg(sdi, cmd, *buf, 256) != SR_OK) - return SR_ERR; - - return SR_OK; -} - -SR_PRIV int rigol_ds_get_dev_cfg(const struct sr_dev_inst *sdi) -{ - struct dev_context *devc; - char *t_s, *cmd; - int i, res; - - devc = sdi->priv; - - /* Analog channel state. */ - if (get_cfg_string(sdi, ":CHAN1:DISP?", &t_s) != SR_OK) - return SR_ERR; - devc->analog_channels[0] = !strcmp(t_s, "ON") || !strcmp(t_s, "1"); - g_free(t_s); - if (get_cfg_string(sdi, ":CHAN2:DISP?", &t_s) != SR_OK) - return SR_ERR; - devc->analog_channels[1] = !strcmp(t_s, "ON") || !strcmp(t_s, "1"); - g_free(t_s); - sr_dbg("Current analog channel state CH1 %s CH2 %s", - devc->analog_channels[0] ? "on" : "off", - devc->analog_channels[1] ? "on" : "off"); - - /* Digital channel state. */ - if (devc->model->has_digital) { - sr_dbg("Current digital channel state:"); - for (i = 0; i < 16; i++) { - cmd = g_strdup_printf(":DIG%d:TURN?", i); - res = get_cfg_string(sdi, cmd, &t_s); - g_free(cmd); - if (res != SR_OK) - return SR_ERR; - devc->digital_channels[i] = !strcmp(t_s, "ON") ? TRUE : FALSE; - g_free(t_s); - sr_dbg("D%d: %s", i, devc->digital_channels[i] ? "on" : "off"); - } - } - - /* Timebase. */ - if (get_cfg_float(sdi, ":TIM:SCAL?", &devc->timebase) != SR_OK) - return SR_ERR; - sr_dbg("Current timebase %g", devc->timebase); - - /* Vertical gain. */ - if (get_cfg_float(sdi, ":CHAN1:SCAL?", &devc->vdiv[0]) != SR_OK) - return SR_ERR; - if (get_cfg_float(sdi, ":CHAN2:SCAL?", &devc->vdiv[1]) != SR_OK) - return SR_ERR; - sr_dbg("Current vertical gain CH1 %g CH2 %g", devc->vdiv[0], devc->vdiv[1]); - - if (devc->model->protocol == PROTOCOL_IEEE488_2) { - /* Vertical reference - not certain if this is the place to read it. */ - if (sr_scpi_send(sdi->conn, ":WAV:SOUR CHAN1") != SR_OK) - return SR_ERR; - if (get_cfg_int(sdi, ":WAV:YREF?", &devc->vert_reference[0]) != SR_OK) - return SR_ERR; - if (sr_scpi_send(sdi->conn, ":WAV:SOUR CHAN2") != SR_OK) - return SR_ERR; - if (get_cfg_int(sdi, ":WAV:YREF?", &devc->vert_reference[1]) != SR_OK) - return SR_ERR; - sr_dbg("Current vertical reference CH1 %d CH2 %d", - devc->vert_reference[0], devc->vert_reference[1]); - } - - /* Vertical offset. */ - if (get_cfg_float(sdi, ":CHAN1:OFFS?", &devc->vert_offset[0]) != SR_OK) - return SR_ERR; - if (get_cfg_float(sdi, ":CHAN2:OFFS?", &devc->vert_offset[1]) != SR_OK) - return SR_ERR; - sr_dbg("Current vertical offset CH1 %g CH2 %g", devc->vert_offset[0], - devc->vert_offset[1]); - - /* Coupling. */ - if (get_cfg_string(sdi, ":CHAN1:COUP?", &devc->coupling[0]) != SR_OK) - return SR_ERR; - if (get_cfg_string(sdi, ":CHAN2:COUP?", &devc->coupling[1]) != SR_OK) - return SR_ERR; - sr_dbg("Current coupling CH1 %s CH2 %s", devc->coupling[0], - devc->coupling[1]); - - /* Trigger source. */ - if (get_cfg_string(sdi, ":TRIG:EDGE:SOUR?", &devc->trigger_source) != SR_OK) - return SR_ERR; - sr_dbg("Current trigger source %s", devc->trigger_source); - - /* Horizontal trigger position. */ - if (get_cfg_float(sdi, ":TIM:OFFS?", &devc->horiz_triggerpos) != SR_OK) - return SR_ERR; - sr_dbg("Current horizontal trigger position %g", devc->horiz_triggerpos); - - /* Trigger slope. */ - if (get_cfg_string(sdi, ":TRIG:EDGE:SLOP?", &devc->trigger_slope) != SR_OK) - return SR_ERR; - sr_dbg("Current trigger slope %s", devc->trigger_slope); - - return SR_OK; -}