Exemple #1
0
static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
{
	(void)cb_data;

	fx2lafw_abort_acquisition(sdi->priv);

	return SR_OK;
}
Exemple #2
0
SR_PRIV int fx2lafw_start_acquisition(const struct sr_dev_inst *sdi)
{
	struct sr_dev_driver *di;
	struct drv_context *drvc;
	struct dev_context *devc;
	int timeout, ret;
	size_t size;

	di = sdi->driver;
	drvc = di->context;
	devc = sdi->priv;

	devc->ctx = drvc->sr_ctx;
	devc->sent_samples = 0;
	devc->empty_transfer_count = 0;
	devc->acq_aborted = FALSE;

	if (configure_channels(sdi) != SR_OK) {
		sr_err("Failed to configure channels.");
		return SR_ERR;
	}

	timeout = get_timeout(devc);
	usb_source_add(sdi->session, devc->ctx, timeout, receive_data, drvc);

	size = get_buffer_size(devc);
	/* Prepare for analog sampling. */
	if (g_slist_length(devc->enabled_analog_channels) > 0) {
		/* We need a buffer half the size of a transfer. */
		devc->logic_buffer = g_try_malloc(size / 2);
		devc->analog_buffer = g_try_malloc(
			sizeof(float) * size / 2);
	}
	start_transfers(sdi);
	if ((ret = command_start_acquisition(sdi)) != SR_OK) {
		fx2lafw_abort_acquisition(devc);
		return ret;
	}

	return SR_OK;
}
Exemple #3
0
SR_PRIV void mso_send_data_proc(struct sr_dev_inst *sdi,
	uint8_t *data, size_t length, size_t sample_width)
{
	size_t i;
	struct dev_context *devc;
	struct sr_datafeed_analog analog;
	struct sr_analog_encoding encoding;
	struct sr_analog_meaning meaning;
	struct sr_analog_spec spec;

	(void)sample_width;

	devc = sdi->priv;

	length /= 2;

	/* Send the logic */
	for (i = 0; i < length; i++) {
		devc->logic_buffer[i] = data[i * 2];
		/* Rescale to -10V - +10V from 0-255. */
		devc->analog_buffer[i] = (data[i * 2 + 1] - 128.0f) / 12.8f;
	};

	const struct sr_datafeed_logic logic = {
		.length = length,
		.unitsize = 1,
		.data = devc->logic_buffer
	};

	const struct sr_datafeed_packet logic_packet = {
		.type = SR_DF_LOGIC,
		.payload = &logic
	};

	sr_session_send(sdi, &logic_packet);

	sr_analog_init(&analog, &encoding, &meaning, &spec, 2);
	analog.meaning->channels = devc->enabled_analog_channels;
	analog.meaning->mq = SR_MQ_VOLTAGE;
	analog.meaning->unit = SR_UNIT_VOLT;
	analog.meaning->mqflags = 0 /* SR_MQFLAG_DC */;
	analog.num_samples = length;
	analog.data = devc->analog_buffer;

	const struct sr_datafeed_packet analog_packet = {
		.type = SR_DF_ANALOG,
		.payload = &analog
	};

	sr_session_send(sdi, &analog_packet);
}

SR_PRIV void la_send_data_proc(struct sr_dev_inst *sdi,
	uint8_t *data, size_t length, size_t sample_width)
{
	const struct sr_datafeed_logic logic = {
		.length = length,
		.unitsize = sample_width,
		.data = data
	};

	const struct sr_datafeed_packet packet = {
		.type = SR_DF_LOGIC,
		.payload = &logic
	};

	sr_session_send(sdi, &packet);
}

SR_PRIV void LIBUSB_CALL fx2lafw_receive_transfer(struct libusb_transfer *transfer)
{
	struct sr_dev_inst *sdi;
	struct dev_context *devc;
	gboolean packet_has_error = FALSE;
	struct sr_datafeed_packet packet;
	unsigned int num_samples;
	int trigger_offset, cur_sample_count, unitsize;
	int pre_trigger_samples;

	sdi = transfer->user_data;
	devc = sdi->priv;

	/*
	 * If acquisition has already ended, just free any queued up
	 * transfer that come in.
	 */
	if (devc->acq_aborted) {
		free_transfer(transfer);
		return;
	}

	sr_dbg("receive_transfer(): status %s received %d bytes.",
		libusb_error_name(transfer->status), transfer->actual_length);

	/* Save incoming transfer before reusing the transfer struct. */
	unitsize = devc->sample_wide ? 2 : 1;
	cur_sample_count = transfer->actual_length / unitsize;

	switch (transfer->status) {
	case LIBUSB_TRANSFER_NO_DEVICE:
		fx2lafw_abort_acquisition(devc);
		free_transfer(transfer);
		return;
	case LIBUSB_TRANSFER_COMPLETED:
	case LIBUSB_TRANSFER_TIMED_OUT: /* We may have received some data though. */
		break;
	default:
		packet_has_error = TRUE;
		break;
	}

	if (transfer->actual_length == 0 || packet_has_error) {
		devc->empty_transfer_count++;
		if (devc->empty_transfer_count > MAX_EMPTY_TRANSFERS) {
			/*
			 * The FX2 gave up. End the acquisition, the frontend
			 * will work out that the samplecount is short.
			 */
			fx2lafw_abort_acquisition(devc);
			free_transfer(transfer);
		} else {
			resubmit_transfer(transfer);
		}
		return;
	} else {
		devc->empty_transfer_count = 0;
	}
	if (devc->trigger_fired) {
		if (!devc->limit_samples || devc->sent_samples < devc->limit_samples) {
			/* Send the incoming transfer to the session bus. */
			if (devc->limit_samples && devc->sent_samples + cur_sample_count > devc->limit_samples)
				num_samples = devc->limit_samples - devc->sent_samples;
			else
				num_samples = cur_sample_count;

			if (devc->dslogic && devc->trigger_pos > devc->sent_samples
				&& devc->trigger_pos <= devc->sent_samples + num_samples) {
					/* DSLogic trigger in this block. Send trigger position. */
					trigger_offset = devc->trigger_pos - devc->sent_samples;
					/* Pre-trigger samples. */
					devc->send_data_proc(sdi, (uint8_t *)transfer->buffer,
						trigger_offset * unitsize, unitsize);
					devc->sent_samples += trigger_offset;
					/* Trigger position. */
					devc->trigger_pos = 0;
					packet.type = SR_DF_TRIGGER;
					packet.payload = NULL;
					sr_session_send(sdi, &packet);
					/* Post trigger samples. */
					num_samples -= trigger_offset;
					devc->send_data_proc(sdi, (uint8_t *)transfer->buffer
							+ trigger_offset * unitsize, num_samples * unitsize, unitsize);
					devc->sent_samples += num_samples;
			} else {
				devc->send_data_proc(sdi, (uint8_t *)transfer->buffer,
					num_samples * unitsize, unitsize);
				devc->sent_samples += num_samples;
			}
		}
	} else {
		trigger_offset = soft_trigger_logic_check(devc->stl,
			transfer->buffer, transfer->actual_length, &pre_trigger_samples);
		if (trigger_offset > -1) {
			devc->sent_samples += pre_trigger_samples;
			num_samples = cur_sample_count - trigger_offset;
			if (devc->limit_samples &&
					num_samples > devc->limit_samples - devc->sent_samples)
				num_samples = devc->limit_samples - devc->sent_samples;

			devc->send_data_proc(sdi, (uint8_t *)transfer->buffer
					+ trigger_offset * unitsize,
					num_samples * unitsize, unitsize);
			devc->sent_samples += num_samples;

			devc->trigger_fired = TRUE;
		}
	}

	if (devc->limit_samples && devc->sent_samples >= devc->limit_samples) {
		fx2lafw_abort_acquisition(devc);
		free_transfer(transfer);
	} else
		resubmit_transfer(transfer);
}

static unsigned int to_bytes_per_ms(unsigned int samplerate)
{
	return samplerate / 1000;
}

SR_PRIV size_t fx2lafw_get_buffer_size(struct dev_context *devc)
{
	size_t s;

	/*
	 * The buffer should be large enough to hold 10ms of data and
	 * a multiple of 512.
	 */
	s = 10 * to_bytes_per_ms(devc->cur_samplerate);
	return (s + 511) & ~511;
}
Exemple #4
0
static int start_transfers(const struct sr_dev_inst *sdi)
{
	struct dev_context *devc;
	struct sr_usb_dev_inst *usb;
	struct sr_trigger *trigger;
	struct libusb_transfer *transfer;
	unsigned int i, num_transfers;
	int timeout, ret;
	unsigned char *buf;
	size_t size;

	devc = sdi->priv;
	usb = sdi->conn;

	devc->sent_samples = 0;
	devc->acq_aborted = FALSE;
	devc->empty_transfer_count = 0;

	if ((trigger = sr_session_trigger_get(sdi->session))) {
		int pre_trigger_samples = 0;
		if (devc->limit_samples > 0)
			pre_trigger_samples = (devc->capture_ratio * devc->limit_samples) / 100;
		devc->stl = soft_trigger_logic_new(sdi, trigger, pre_trigger_samples);
		if (!devc->stl)
			return SR_ERR_MALLOC;
		devc->trigger_fired = FALSE;
	} else
		devc->trigger_fired = TRUE;

	num_transfers = get_number_of_transfers(devc);

	size = get_buffer_size(devc);
	devc->submitted_transfers = 0;

	devc->transfers = g_try_malloc0(sizeof(*devc->transfers) * num_transfers);
	if (!devc->transfers) {
		sr_err("USB transfers malloc failed.");
		return SR_ERR_MALLOC;
	}

	timeout = get_timeout(devc);
	devc->num_transfers = num_transfers;
	for (i = 0; i < num_transfers; i++) {
		if (!(buf = g_try_malloc(size))) {
			sr_err("USB transfer buffer malloc failed.");
			return SR_ERR_MALLOC;
		}
		transfer = libusb_alloc_transfer(0);
		libusb_fill_bulk_transfer(transfer, usb->devhdl,
				2 | LIBUSB_ENDPOINT_IN, buf, size,
				receive_transfer, (void *)sdi, timeout);
		sr_info("submitting transfer: %d", i);
		if ((ret = libusb_submit_transfer(transfer)) != 0) {
			sr_err("Failed to submit transfer: %s.",
			       libusb_error_name(ret));
			libusb_free_transfer(transfer);
			g_free(buf);
			fx2lafw_abort_acquisition(devc);
			return SR_ERR;
		}
		devc->transfers[i] = transfer;
		devc->submitted_transfers++;
	}

	/*
	 * If this device has analog channels and at least one of them is
	 * enabled, use mso_send_data_proc() to properly handle the analog
	 * data. Otherwise use la_send_data_proc().
	 */
	if (g_slist_length(devc->enabled_analog_channels) > 0)
		devc->send_data_proc = mso_send_data_proc;
	else
		devc->send_data_proc = la_send_data_proc;

	std_session_send_df_header(sdi);

	return SR_OK;
}
Exemple #5
0
static void mso_send_data_proc(struct sr_dev_inst *sdi,
	uint8_t *data, size_t length, size_t sample_width)
{
	size_t i;
	struct dev_context *devc;
	struct sr_datafeed_analog analog;
	struct sr_analog_encoding encoding;
	struct sr_analog_meaning meaning;
	struct sr_analog_spec spec;

	(void)sample_width;

	devc = sdi->priv;

	length /= 2;

	/* Send the logic */
	for (i = 0; i < length; i++) {
		devc->logic_buffer[i] = data[i * 2];
		/* Rescale to -10V - +10V from 0-255. */
		devc->analog_buffer[i] = (data[i * 2 + 1] - 128.0f) / 12.8f;
	};

	const struct sr_datafeed_logic logic = {
		.length = length,
		.unitsize = 1,
		.data = devc->logic_buffer
	};

	const struct sr_datafeed_packet logic_packet = {
		.type = SR_DF_LOGIC,
		.payload = &logic
	};

	sr_session_send(sdi, &logic_packet);

	sr_analog_init(&analog, &encoding, &meaning, &spec, 2);
	analog.meaning->channels = devc->enabled_analog_channels;
	analog.meaning->mq = SR_MQ_VOLTAGE;
	analog.meaning->unit = SR_UNIT_VOLT;
	analog.meaning->mqflags = 0 /* SR_MQFLAG_DC */;
	analog.num_samples = length;
	analog.data = devc->analog_buffer;

	const struct sr_datafeed_packet analog_packet = {
		.type = SR_DF_ANALOG,
		.payload = &analog
	};

	sr_session_send(sdi, &analog_packet);
}

static void la_send_data_proc(struct sr_dev_inst *sdi,
	uint8_t *data, size_t length, size_t sample_width)
{
	const struct sr_datafeed_logic logic = {
		.length = length,
		.unitsize = sample_width,
		.data = data
	};

	const struct sr_datafeed_packet packet = {
		.type = SR_DF_LOGIC,
		.payload = &logic
	};

	sr_session_send(sdi, &packet);
}

static void LIBUSB_CALL receive_transfer(struct libusb_transfer *transfer)
{
	struct sr_dev_inst *sdi;
	struct dev_context *devc;
	gboolean packet_has_error = FALSE;
	unsigned int num_samples;
	int trigger_offset, cur_sample_count, unitsize;
	int pre_trigger_samples;

	sdi = transfer->user_data;
	devc = sdi->priv;

	/*
	 * If acquisition has already ended, just free any queued up
	 * transfer that come in.
	 */
	if (devc->acq_aborted) {
		free_transfer(transfer);
		return;
	}

	sr_dbg("receive_transfer(): status %s received %d bytes.",
		libusb_error_name(transfer->status), transfer->actual_length);

	/* Save incoming transfer before reusing the transfer struct. */
	unitsize = devc->sample_wide ? 2 : 1;
	cur_sample_count = transfer->actual_length / unitsize;

	switch (transfer->status) {
	case LIBUSB_TRANSFER_NO_DEVICE:
		fx2lafw_abort_acquisition(devc);
		free_transfer(transfer);
		return;
	case LIBUSB_TRANSFER_COMPLETED:
	case LIBUSB_TRANSFER_TIMED_OUT: /* We may have received some data though. */
		break;
	default:
		packet_has_error = TRUE;
		break;
	}

	if (transfer->actual_length == 0 || packet_has_error) {
		devc->empty_transfer_count++;
		if (devc->empty_transfer_count > MAX_EMPTY_TRANSFERS) {
			/*
			 * The FX2 gave up. End the acquisition, the frontend
			 * will work out that the samplecount is short.
			 */
			fx2lafw_abort_acquisition(devc);
			free_transfer(transfer);
		} else {
			resubmit_transfer(transfer);
		}
		return;
	} else {
		devc->empty_transfer_count = 0;
	}
	if (devc->trigger_fired) {
		if (!devc->limit_samples || devc->sent_samples < devc->limit_samples) {
			/* Send the incoming transfer to the session bus. */
			if (devc->limit_samples && devc->sent_samples + cur_sample_count > devc->limit_samples)
				num_samples = devc->limit_samples - devc->sent_samples;
			else
				num_samples = cur_sample_count;

			devc->send_data_proc(sdi, (uint8_t *)transfer->buffer,
				num_samples * unitsize, unitsize);
			devc->sent_samples += num_samples;
		}
	} else {
		trigger_offset = soft_trigger_logic_check(devc->stl,
			transfer->buffer, transfer->actual_length, &pre_trigger_samples);
		if (trigger_offset > -1) {
			devc->sent_samples += pre_trigger_samples;
			num_samples = cur_sample_count - trigger_offset;
			if (devc->limit_samples &&
					num_samples > devc->limit_samples - devc->sent_samples)
				num_samples = devc->limit_samples - devc->sent_samples;

			devc->send_data_proc(sdi, (uint8_t *)transfer->buffer
					+ trigger_offset * unitsize,
					num_samples * unitsize, unitsize);
			devc->sent_samples += num_samples;

			devc->trigger_fired = TRUE;
		}
	}

	if (devc->limit_samples && devc->sent_samples >= devc->limit_samples) {
		fx2lafw_abort_acquisition(devc);
		free_transfer(transfer);
	} else
		resubmit_transfer(transfer);
}

static int configure_channels(const struct sr_dev_inst *sdi)
{
	struct dev_context *devc;
	const GSList *l;
	int p;
	struct sr_channel *ch;
	uint32_t channel_mask = 0, num_analog = 0;

	devc = sdi->priv;

	g_slist_free(devc->enabled_analog_channels);
	devc->enabled_analog_channels = NULL;

	for (l = sdi->channels, p = 0; l; l = l->next, p++) {
		ch = l->data;
		if ((p <= NUM_CHANNELS) && (ch->type == SR_CHANNEL_ANALOG)
				&& (ch->enabled)) {
			num_analog++;
			devc->enabled_analog_channels =
			    g_slist_append(devc->enabled_analog_channels, ch);
		} else {
			channel_mask |= ch->enabled << p;
		}
	}

	/*
	 * Use wide sampling if either any of the LA channels 8..15 is enabled,
	 * and/or at least one analog channel is enabled.
	 */
	devc->sample_wide = channel_mask > 0xff || num_analog > 0;

	return SR_OK;
}

static unsigned int to_bytes_per_ms(unsigned int samplerate)
{
	return samplerate / 1000;
}

static size_t get_buffer_size(struct dev_context *devc)
{
	size_t s;

	/*
	 * The buffer should be large enough to hold 10ms of data and
	 * a multiple of 512.
	 */
	s = 10 * to_bytes_per_ms(devc->cur_samplerate);
	return (s + 511) & ~511;
}
Exemple #6
0
static int dev_acquisition_stop(struct sr_dev_inst *sdi)
{
	fx2lafw_abort_acquisition(sdi->priv);

	return SR_OK;
}
Exemple #7
0
SR_PRIV void fx2lafw_receive_transfer(struct libusb_transfer *transfer)
{
	gboolean packet_has_error = FALSE;
	struct sr_datafeed_packet packet;
	struct sr_datafeed_logic logic;
	struct dev_context *devc;
	int trigger_offset, i, sample_width, cur_sample_count;
	int trigger_offset_bytes;
	uint8_t *cur_buf;
	uint16_t cur_sample;

	devc = transfer->user_data;

	/*
	 * If acquisition has already ended, just free any queued up
	 * transfer that come in.
	 */
	if (devc->num_samples == -1) {
		free_transfer(transfer);
		return;
	}

	sr_info("receive_transfer(): status %d received %d bytes.",
		transfer->status, transfer->actual_length);

	/* Save incoming transfer before reusing the transfer struct. */
	cur_buf = transfer->buffer;
	sample_width = devc->sample_wide ? 2 : 1;
	cur_sample_count = transfer->actual_length / sample_width;

	switch (transfer->status) {
	case LIBUSB_TRANSFER_NO_DEVICE:
		fx2lafw_abort_acquisition(devc);
		free_transfer(transfer);
		return;
	case LIBUSB_TRANSFER_COMPLETED:
	case LIBUSB_TRANSFER_TIMED_OUT: /* We may have received some data though. */
		break;
	default:
		packet_has_error = TRUE;
		break;
	}

	if (transfer->actual_length == 0 || packet_has_error) {
		devc->empty_transfer_count++;
		if (devc->empty_transfer_count > MAX_EMPTY_TRANSFERS) {
			/*
			 * The FX2 gave up. End the acquisition, the frontend
			 * will work out that the samplecount is short.
			 */
			fx2lafw_abort_acquisition(devc);
			free_transfer(transfer);
		} else {
			resubmit_transfer(transfer);
		}
		return;
	} else {
		devc->empty_transfer_count = 0;
	}

	trigger_offset = 0;
	if (devc->trigger_stage >= 0) {
		for (i = 0; i < cur_sample_count; i++) {

			cur_sample = devc->sample_wide ?
				*((uint16_t *)cur_buf + i) :
				*((uint8_t *)cur_buf + i);

			if ((cur_sample & devc->trigger_mask[devc->trigger_stage]) ==
				devc->trigger_value[devc->trigger_stage]) {
				/* Match on this trigger stage. */
				devc->trigger_buffer[devc->trigger_stage] = cur_sample;
				devc->trigger_stage++;

				if (devc->trigger_stage == NUM_TRIGGER_STAGES ||
					devc->trigger_mask[devc->trigger_stage] == 0) {
					/* Match on all trigger stages, we're done. */
					trigger_offset = i + 1;

					/*
					 * TODO: Send pre-trigger buffer to session bus.
					 * Tell the frontend we hit the trigger here.
					 */
					packet.type = SR_DF_TRIGGER;
					packet.payload = NULL;
					sr_session_send(devc->cb_data, &packet);

					/*
					 * Send the samples that triggered it,
					 * since we're skipping past them.
					 */
					packet.type = SR_DF_LOGIC;
					packet.payload = &logic;
					logic.unitsize = sample_width;
					logic.length = devc->trigger_stage * logic.unitsize;
					logic.data = devc->trigger_buffer;
					sr_session_send(devc->cb_data, &packet);

					devc->trigger_stage = TRIGGER_FIRED;
					break;
				}
			} else if (devc->trigger_stage > 0) {
				/*
				 * We had a match before, but not in the next sample. However, we may
				 * have a match on this stage in the next bit -- trigger on 0001 will
				 * fail on seeing 00001, so we need to go back to stage 0 -- but at
				 * the next sample from the one that matched originally, which the
				 * counter increment at the end of the loop takes care of.
				 */
				i -= devc->trigger_stage;
				if (i < -1)
					i = -1; /* Oops, went back past this buffer. */
				/* Reset trigger stage. */
				devc->trigger_stage = 0;
			}
		}
	}

	if (devc->trigger_stage == TRIGGER_FIRED) {
		/* Send the incoming transfer to the session bus. */
		trigger_offset_bytes = trigger_offset * sample_width;
		packet.type = SR_DF_LOGIC;
		packet.payload = &logic;
		logic.length = transfer->actual_length - trigger_offset_bytes;
		logic.unitsize = sample_width;
		logic.data = cur_buf + trigger_offset_bytes;
		sr_session_send(devc->cb_data, &packet);

		devc->num_samples += cur_sample_count;
		if (devc->limit_samples &&
			(unsigned int)devc->num_samples > devc->limit_samples) {
			fx2lafw_abort_acquisition(devc);
			free_transfer(transfer);
			return;
		}
	} else {
		/*
		 * TODO: Buffer pre-trigger data in capture
		 * ratio-sized buffer.
		 */
	}

	resubmit_transfer(transfer);
}
Exemple #8
0
static int dev_acquisition_start(const struct sr_dev_inst *sdi, void *cb_data)
{
	struct dev_context *devc;
	struct drv_context *drvc;
	struct sr_usb_dev_inst *usb;
	struct sr_trigger *trigger;
	struct libusb_transfer *transfer;
	unsigned int i, timeout, num_transfers;
	int ret;
	unsigned char *buf;
	size_t size;

	if (sdi->status != SR_ST_ACTIVE)
		return SR_ERR_DEV_CLOSED;

	drvc = di->priv;
	devc = sdi->priv;
	usb = sdi->conn;

	devc->cb_data = cb_data;
	devc->sent_samples = 0;
	devc->acq_aborted = FALSE;
	devc->empty_transfer_count = 0;

	if ((trigger = sr_session_trigger_get())) {
		devc->stl = soft_trigger_logic_new(sdi, trigger);
		devc->trigger_fired = FALSE;
	} else
		devc->trigger_fired = TRUE;

	timeout = fx2lafw_get_timeout(devc);
	num_transfers = fx2lafw_get_number_of_transfers(devc);
	size = fx2lafw_get_buffer_size(devc);
	devc->submitted_transfers = 0;

	devc->transfers = g_try_malloc0(sizeof(*devc->transfers) * num_transfers);
	if (!devc->transfers) {
		sr_err("USB transfers malloc failed.");
		return SR_ERR_MALLOC;
	}

	devc->num_transfers = num_transfers;
	for (i = 0; i < num_transfers; i++) {
		if (!(buf = g_try_malloc(size))) {
			sr_err("USB transfer buffer malloc failed.");
			return SR_ERR_MALLOC;
		}
		transfer = libusb_alloc_transfer(0);
		libusb_fill_bulk_transfer(transfer, usb->devhdl,
				2 | LIBUSB_ENDPOINT_IN, buf, size,
				fx2lafw_receive_transfer, (void *)sdi, timeout);
		if ((ret = libusb_submit_transfer(transfer)) != 0) {
			sr_err("Failed to submit transfer: %s.",
			       libusb_error_name(ret));
			libusb_free_transfer(transfer);
			g_free(buf);
			fx2lafw_abort_acquisition(devc);
			return SR_ERR;
		}
		devc->transfers[i] = transfer;
		devc->submitted_transfers++;
	}

	devc->ctx = drvc->sr_ctx;

	usb_source_add(devc->ctx, timeout, receive_data, NULL);

	/* Send header packet to the session bus. */
	std_session_send_df_header(cb_data, LOG_PREFIX);

	if ((ret = fx2lafw_command_start_acquisition(sdi)) != SR_OK) {
		fx2lafw_abort_acquisition(devc);
		return ret;
	}

	return SR_OK;
}