[libsigrok.git] / src / hardware / pipistrello-ols / protocol.c

/*
 * This file is part of the libsigrok project.
 *
 * Copyright (C) 2013 Bert Vermeulen <bert@biot.com>
 *
 * 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 <http://www.gnu.org/licenses/>.
 */

#include <config.h>
#include "protocol.h"

SR_PRIV int write_shortcommand(struct dev_context *devc, uint8_t command)
{
	uint8_t buf[1];
	int bytes_written;

	sr_dbg("Sending cmd 0x%.2x.", command);
	buf[0] = command;
	bytes_written = ftdi_write_data(devc->ftdic, buf, 1);
	if (bytes_written < 0) {
		sr_err("Failed to write FTDI data (%d): %s.",
		       bytes_written, ftdi_get_error_string(devc->ftdic));
		return SR_ERR;
	} else if (bytes_written != 1) {
		sr_err("FTDI write error, only %d/%d bytes written: %s.",
		       bytes_written, 1, ftdi_get_error_string(devc->ftdic));
		return SR_ERR;
	}

	return SR_OK;
}

SR_PRIV int write_longcommand(struct dev_context *devc, uint8_t command, uint8_t *data)
{
	uint8_t buf[5];
	int bytes_written;

	sr_dbg("Sending cmd 0x%.2x data 0x%.2x%.2x%.2x%.2x.", command,
			data[0], data[1], data[2], data[3]);
	buf[0] = command;
	buf[1] = data[0];
	buf[2] = data[1];
	buf[3] = data[2];
	buf[4] = data[3];
	bytes_written = ftdi_write_data(devc->ftdic, buf, 5);
	if (bytes_written < 0) {
		sr_err("Failed to write FTDI data (%d): %s.",
		       bytes_written, ftdi_get_error_string(devc->ftdic));
		return SR_ERR;
	} else if (bytes_written != 5) {
		sr_err("FTDI write error, only %d/%d bytes written: %s.",
		       bytes_written, 1, ftdi_get_error_string(devc->ftdic));
		return SR_ERR;
	}

	return SR_OK;
}

SR_PRIV int p_ols_open(struct dev_context *devc)
{
	int ret;

	/* Note: Caller checks devc and devc->ftdic. */

	ret = ftdi_set_interface(devc->ftdic, INTERFACE_B);
	if (ret < 0) {
		sr_err("Failed to set FTDI interface B (%d): %s", ret,
		       ftdi_get_error_string(devc->ftdic));
		return SR_ERR;
	}

	ret = ftdi_usb_open_desc(devc->ftdic, USB_VENDOR_ID, USB_DEVICE_ID,
				 USB_IPRODUCT, NULL);
	if (ret < 0) {
		/* Log errors, except for -3 ("device not found"). */
		if (ret != -3)
			sr_err("Failed to open device (%d): %s", ret,
			       ftdi_get_error_string(devc->ftdic));
		return SR_ERR;
	}

	if ((ret = ftdi_usb_purge_buffers(devc->ftdic)) < 0) {
		sr_err("Failed to purge FTDI RX/TX buffers (%d): %s.",
		       ret, ftdi_get_error_string(devc->ftdic));
		goto err_open_close_ftdic;
	}

	ret = ftdi_set_bitmode(devc->ftdic, 0xff, BITMODE_RESET);
	if (ret < 0) {
		sr_err("Failed to reset the FTDI chip bitmode (%d): %s.",
		       ret, ftdi_get_error_string(devc->ftdic));
		goto err_open_close_ftdic;
	}

	ret = ftdi_set_latency_timer(devc->ftdic, 16);
	if (ret < 0) {
		sr_err("Failed to set FTDI latency timer (%d): %s.",
		       ret, ftdi_get_error_string(devc->ftdic));
		goto err_open_close_ftdic;
	}

	ret = ftdi_read_data_set_chunksize(devc->ftdic, 64 * 1024);
	if (ret < 0) {
		sr_err("Failed to set FTDI read data chunk size (%d): %s.",
		       ret, ftdi_get_error_string(devc->ftdic));
		goto err_open_close_ftdic;
	}

	return SR_OK;

err_open_close_ftdic:
	ftdi_usb_close(devc->ftdic);

	return SR_ERR;
}

SR_PRIV int p_ols_close(struct dev_context *devc)
{
	int ret;

	/* Note: Caller checks devc and devc->ftdic. */

	if ((ret = ftdi_usb_close(devc->ftdic)) < 0) {
		sr_err("Failed to close FTDI device (%d): %s.",
		       ret, ftdi_get_error_string(devc->ftdic));
		return SR_ERR;
	}

	return SR_OK;
}

/* Configures the channel mask based on which channels are enabled. */
SR_PRIV void pols_channel_mask(const struct sr_dev_inst *sdi)
{
	struct dev_context *devc;
	struct sr_channel *channel;
	const GSList *l;

	devc = sdi->priv;

	devc->channel_mask = 0;
	for (l = sdi->channels; l; l = l->next) {
		channel = l->data;
		if (channel->enabled)
			devc->channel_mask |= 1 << channel->index;
	}
}

SR_PRIV int pols_convert_trigger(const struct sr_dev_inst *sdi)
{
	struct dev_context *devc;
	struct sr_trigger *trigger;
	struct sr_trigger_stage *stage;
	struct sr_trigger_match *match;
	const GSList *l, *m;
	int i;

	devc = sdi->priv;

	devc->num_stages = 0;
	for (i = 0; i < NUM_TRIGGER_STAGES; i++) {
		devc->trigger_mask[i] = 0;
		devc->trigger_value[i] = 0;
		devc->trigger_edge[i] = 0;
	}

	if (!(trigger = sr_session_trigger_get(sdi->session)))
		return SR_OK;

	devc->num_stages = g_slist_length(trigger->stages);
	if (devc->num_stages > NUM_TRIGGER_STAGES) {
		sr_err("This device only supports %d trigger stages.",
				NUM_TRIGGER_STAGES);
		return SR_ERR;
	}

	for (l = trigger->stages; l; l = l->next) {
		stage = l->data;
		for (m = stage->matches; m; m = m->next) {
			match = m->data;
			if (!match->channel->enabled)
				/* Ignore disabled channels with a trigger. */
				continue;
			devc->trigger_mask[stage->stage] |= 1 << match->channel->index;
			if (match->match == SR_TRIGGER_ONE || match->match == SR_TRIGGER_RISING)
				devc->trigger_value[stage->stage] |= 1 << match->channel->index;
			if (match->match == SR_TRIGGER_RISING || match->match == SR_TRIGGER_FALLING)
				devc->trigger_edge[stage->stage] |= 1 << match->channel->index;
		}
	}

	return SR_OK;
}

SR_PRIV struct sr_dev_inst *p_ols_get_metadata(uint8_t *buf, int bytes_read, struct dev_context *devc)
{
	struct sr_dev_inst *sdi;
	uint32_t tmp_int, ui;
	uint8_t key, type, token;
	GString *tmp_str, *devname, *version;
	guchar tmp_c;
	int index, i;

	sdi = g_malloc0(sizeof(struct sr_dev_inst));
	sdi->status = SR_ST_INACTIVE;
	sdi->priv = devc;

	devname = g_string_new("");
	version = g_string_new("");

	index = 0;
	while (index < bytes_read) {
		key = buf[index++];
		if (key == 0x00) {
			sr_dbg("Got metadata key 0x00, metadata ends.");
			break;
		}
		type = key >> 5;
		token = key & 0x1f;
		switch (type) {
		case 0:
			/* NULL-terminated string */
			tmp_str = g_string_new("");
			while ((index < bytes_read) && ((tmp_c = buf[index++]) != '\0'))
				g_string_append_c(tmp_str, tmp_c);
			sr_dbg("Got metadata key 0x%.2x value '%s'.",
			       key, tmp_str->str);
			switch (token) {
			case 0x01:
				/* Device name */
				devname = g_string_append(devname, tmp_str->str);
				break;
			case 0x02:
				/* FPGA firmware version */
				if (version->len)
					g_string_append(version, ", ");
				g_string_append(version, "FPGA version ");
				g_string_append(version, tmp_str->str);
				break;
			case 0x03:
				/* Ancillary version */
				if (version->len)
					g_string_append(version, ", ");
				g_string_append(version, "Ancillary version ");
				g_string_append(version, tmp_str->str);
				break;
			default:
				sr_info("Unknown token 0x%.2x: '%s'",
					token, tmp_str->str);
				break;
			}
			g_string_free(tmp_str, TRUE);
			break;
		case 1:
			/* 32-bit unsigned integer */
			tmp_int = 0;
			for (i = 0; i < 4; i++) {
				tmp_int = (tmp_int << 8) | buf[index++];
			}
			sr_dbg("Got metadata key 0x%.2x value 0x%.8x.",
			       key, tmp_int);
			switch (token) {
			case 0x00:
				/* Number of usable channels */
				for (ui = 0; ui < tmp_int; ui++)
					sr_channel_new(sdi, ui, SR_CHANNEL_LOGIC, TRUE,
							p_ols_channel_names[ui]);
				break;
			case 0x01:
				/* Amount of sample memory available (bytes) */
				devc->max_samplebytes = tmp_int;
				break;
			case 0x02:
				/* Amount of dynamic memory available (bytes) */
				/* what is this for? */
				break;
			case 0x03:
				/* Maximum sample rate (Hz) */
				devc->max_samplerate = tmp_int;
				break;
			case 0x04:
				/* protocol version */
				devc->protocol_version = tmp_int;
				break;
			default:
				sr_info("Unknown token 0x%.2x: 0x%.8x.",
					token, tmp_int);
				break;
			}
			break;
		case 2:
			/* 8-bit unsigned integer */
			tmp_c = buf[index++];
			sr_dbg("Got metadata key 0x%.2x value 0x%.2x.",
			       key, tmp_c);
			switch (token) {
			case 0x00:
				/* Number of usable channels */
				for (ui = 0; ui < tmp_c; ui++)
					sr_channel_new(sdi, ui, SR_CHANNEL_LOGIC, TRUE,
							p_ols_channel_names[ui]);
				break;
			case 0x01:
				/* protocol version */
				devc->protocol_version = tmp_c;
				break;
			default:
				sr_info("Unknown token 0x%.2x: 0x%.2x.",
					token, tmp_c);
				break;
			}
			break;
		default:
			/* unknown type */
			break;
		}
	}

	sdi->model = devname->str;
	sdi->version = version->str;
	g_string_free(devname, FALSE);
	g_string_free(version, FALSE);

	return sdi;
}

SR_PRIV int p_ols_set_samplerate(const struct sr_dev_inst *sdi,
		const uint64_t samplerate)
{
	struct dev_context *devc;

	devc = sdi->priv;
	if (devc->max_samplerate && samplerate > devc->max_samplerate)
		return SR_ERR_SAMPLERATE;

	if (samplerate > CLOCK_RATE) {
		sr_info("Enabling demux mode.");
		devc->flag_reg |= FLAG_DEMUX;
		devc->flag_reg &= ~FLAG_FILTER;
		devc->max_channels = NUM_CHANNELS / 2;
		devc->cur_samplerate_divider = (CLOCK_RATE * 2 / samplerate) - 1;
	} else {
		sr_info("Disabling demux mode.");
		devc->flag_reg &= ~FLAG_DEMUX;
		devc->flag_reg |= FLAG_FILTER;
		devc->max_channels = NUM_CHANNELS;
		devc->cur_samplerate_divider = (CLOCK_RATE / samplerate) - 1;
	}

	/* Calculate actual samplerate used and complain if it is different
	 * from the requested.
	 */
	devc->cur_samplerate = CLOCK_RATE / (devc->cur_samplerate_divider + 1);
	if (devc->flag_reg & FLAG_DEMUX)
		devc->cur_samplerate *= 2;
	if (devc->cur_samplerate != samplerate)
		sr_info("Can't match samplerate %" PRIu64 ", using %"
		       PRIu64 ".", samplerate, devc->cur_samplerate);

	return SR_OK;
}

SR_PRIV int p_ols_receive_data(int fd, int revents, void *cb_data)
{
	struct dev_context *devc;
	struct sr_dev_inst *sdi;
	struct sr_datafeed_packet packet;
	struct sr_datafeed_logic logic;
	uint32_t sample;
	int num_channels, offset, j;
	int bytes_read, index;
	unsigned int i;
	unsigned char byte;

	(void)fd;
	(void)revents;

	sdi = cb_data;
	devc = sdi->priv;

	if (devc->num_transfers++ == 0) {
		devc->raw_sample_buf = g_try_malloc(devc->limit_samples * 4);
		if (!devc->raw_sample_buf) {
			sr_err("Sample buffer malloc failed.");
			return FALSE;
		}
		/* fill with 1010... for debugging */
		memset(devc->raw_sample_buf, 0x82, devc->limit_samples * 4);
	}

	if ((devc->num_samples < devc->limit_samples) && (devc->cnt_samples < devc->max_samples)) {

		num_channels = 0;
		for (i = NUM_CHANNELS; i > 0x02; i /= 2) {
			if ((devc->flag_reg & i) == 0) {
				num_channels++;
			}
		}

		/* Get a block of data. */
		bytes_read = ftdi_read_data(devc->ftdic, devc->ftdi_buf, FTDI_BUF_SIZE);
		if (bytes_read < 0) {
			sr_err("Failed to read FTDI data (%d): %s.",
			       bytes_read, ftdi_get_error_string(devc->ftdic));
			sr_dev_acquisition_stop(sdi);
			return FALSE;
		}
		if (bytes_read == 0) {
			sr_spew("Received 0 bytes, nothing to do.");
			return TRUE;
		}

		sr_dbg("Received %d bytes", bytes_read);

		index = 0;
		while (index < bytes_read) {
			byte = devc->ftdi_buf[index++];
			devc->cnt_bytes++;

			devc->sample[devc->num_bytes++] = byte;
			sr_spew("Received byte 0x%.2x.", byte);

			if ((devc->flag_reg & FLAG_DEMUX) && (devc->flag_reg & FLAG_RLE)) {
				/* RLE in demux mode must be processed differently
				* since in this case the RLE encoder is operating on pairs of samples.
				*/
				if (devc->num_bytes == num_channels * 2) {
					devc->cnt_samples += 2;
					devc->cnt_samples_rle += 2;
					/*
					 * Got a sample pair. Convert from the OLS's little-endian
					 * sample to the local format.
					 */
					sample = devc->sample[0] | (devc->sample[1] << 8) \
							| (devc->sample[2] << 16) | (devc->sample[3] << 24);
					sr_spew("Received sample pair 0x%.*x.", devc->num_bytes * 2, sample);

					/*
					 * In RLE mode the high bit of the sample pair is the
					 * "count" flag, meaning this sample pair is the number
					 * of times the previous sample pair occurred.
					 */
					if (devc->sample[devc->num_bytes - 1] & 0x80) {
						/* Clear the high bit. */
						sample &= ~(0x80 << (devc->num_bytes - 1) * 8);
						devc->rle_count = sample;
						devc->cnt_samples_rle += devc->rle_count * 2;
						sr_dbg("RLE count: %u.", devc->rle_count * 2);
						devc->num_bytes = 0;
						continue;
					}
					devc->num_samples += (devc->rle_count + 1) * 2;
					if (devc->num_samples > devc->limit_samples) {
						/* Save us from overrunning the buffer. */
						devc->rle_count -= (devc->num_samples - devc->limit_samples) / 2;
						devc->num_samples = devc->limit_samples;
						index = bytes_read;
					}

					/*
					 * Some channel groups may have been turned
					 * off, to speed up transfer between the
					 * hardware and the PC. Expand that here before
					 * submitting it over the session bus --
					 * whatever is listening on the bus will be
					 * expecting a full 32-bit sample, based on
					 * the number of channels.
					 */
					j = 0;
					/* expand first sample */
					memset(devc->tmp_sample, 0, 4);
					for (i = 0; i < 2; i++) {
						if (((devc->flag_reg >> 2) & (1 << i)) == 0) {
							/*
							 * This channel group was
							 * enabled, copy from received
							 * sample.
							 */
							devc->tmp_sample[i] = devc->sample[j++];
						}
					}
					/* Clear out the most significant bit of the sample */
					devc->tmp_sample[devc->num_bytes - 1] &= 0x7f;
					sr_spew("Expanded sample 1: 0x%.2x%.2x%.2x%.2x.",
						devc->tmp_sample[3], devc->tmp_sample[2],
						devc->tmp_sample[1], devc->tmp_sample[0]);

					/* expand second sample */
					memset(devc->tmp_sample2, 0, 4);
					for (i = 0; i < 2; i++) {
						if (((devc->flag_reg >> 2) & (1 << i)) == 0) {
							/*
							 * This channel group was
							 * enabled, copy from received
							 * sample.
							 */
							devc->tmp_sample2[i] = devc->sample[j++];
						}
					}
					/* Clear out the most significant bit of the sample */
					devc->tmp_sample2[devc->num_bytes - 1] &= 0x7f;
					sr_spew("Expanded sample 2: 0x%.2x%.2x%.2x%.2x.",
						devc->tmp_sample2[3], devc->tmp_sample2[2],
						devc->tmp_sample2[1], devc->tmp_sample2[0]);

					/*
					 * OLS sends its sample buffer backwards.
					 * store it in reverse order here, so we can dump
					 * this on the session bus later.
					 */
					offset = (devc->limit_samples - devc->num_samples) * 4;
					for (i = 0; i <= devc->rle_count; i++) {
						memcpy(devc->raw_sample_buf + offset + (i * 8),
									 devc->tmp_sample2, 4);
						memcpy(devc->raw_sample_buf + offset + (4 + (i * 8)),
									 devc->tmp_sample, 4);
					}
					memset(devc->sample, 0, 4);
					devc->num_bytes = 0;
					devc->rle_count = 0;
				}
			}
			else {
				if (devc->num_bytes == num_channels) {
					devc->cnt_samples++;
					devc->cnt_samples_rle++;
					/*
					 * Got a full sample. Convert from the OLS's little-endian
					 * sample to the local format.
					 */
					sample = devc->sample[0] | (devc->sample[1] << 8) \
							| (devc->sample[2] << 16) | (devc->sample[3] << 24);
					sr_spew("Received sample 0x%.*x.", devc->num_bytes * 2, sample);
					if (devc->flag_reg & FLAG_RLE) {
						/*
						 * In RLE mode the high bit of the sample is the
						 * "count" flag, meaning this sample is the number
						 * of times the previous sample occurred.
						 */
						if (devc->sample[devc->num_bytes - 1] & 0x80) {
							/* Clear the high bit. */
							sample &= ~(0x80 << (devc->num_bytes - 1) * 8);
							devc->rle_count = sample;
							devc->cnt_samples_rle += devc->rle_count;
							sr_dbg("RLE count: %u.", devc->rle_count);
							devc->num_bytes = 0;
							continue;
						}
					}
					devc->num_samples += devc->rle_count + 1;
					if (devc->num_samples > devc->limit_samples) {
						/* Save us from overrunning the buffer. */
						devc->rle_count -= devc->num_samples - devc->limit_samples;
						devc->num_samples = devc->limit_samples;
						index = bytes_read;
					}

					if (num_channels < 4) {
						/*
						 * Some channel groups may have been turned
						 * off, to speed up transfer between the
						 * hardware and the PC. Expand that here before
						 * submitting it over the session bus --
						 * whatever is listening on the bus will be
						 * expecting a full 32-bit sample, based on
						 * the number of channels.
						 */
						j = 0;
						memset(devc->tmp_sample, 0, 4);
						for (i = 0; i < 4; i++) {
							if (((devc->flag_reg >> 2) & (1 << i)) == 0) {
								/*
								 * This channel group was
								 * enabled, copy from received
								 * sample.
								 */
								devc->tmp_sample[i] = devc->sample[j++];
							}
						}
						memcpy(devc->sample, devc->tmp_sample, 4);
						sr_spew("Expanded sample: 0x%.8x.", sample);
					}

					/*
					 * Pipistrello OLS sends its sample buffer backwards.
					 * store it in reverse order here, so we can dump
					 * this on the session bus later.
					 */
					offset = (devc->limit_samples - devc->num_samples) * 4;
					for (i = 0; i <= devc->rle_count; i++) {
						memcpy(devc->raw_sample_buf + offset + (i * 4),
									 devc->sample, 4);
					}
					memset(devc->sample, 0, 4);
					devc->num_bytes = 0;
					devc->rle_count = 0;
				}
			}
		}
		return TRUE;
	} else {
		do {
			bytes_read = ftdi_read_data(devc->ftdic, devc->ftdi_buf, FTDI_BUF_SIZE);
		} while (bytes_read > 0);

		/*
		 * We've acquired all the samples we asked for -- we're done.
		 * Send the (properly-ordered) buffer to the frontend.
		 */
		sr_dbg("Received %d bytes, %d samples, %d decompressed samples.",
				devc->cnt_bytes, devc->cnt_samples,
				devc->cnt_samples_rle);
		if (devc->trigger_at != -1) {
			/*
			 * A trigger was set up, so we need to tell the frontend
			 * about it.
			 */
			if (devc->trigger_at > 0) {
				/* There are pre-trigger samples, send those first. */
				packet.type = SR_DF_LOGIC;
				packet.payload = &logic;
				logic.length = devc->trigger_at * 4;
				logic.unitsize = 4;
				logic.data = devc->raw_sample_buf +
					(devc->limit_samples - devc->num_samples) * 4;
				sr_session_send(sdi, &packet);
			}

			/* Send the trigger. */
			packet.type = SR_DF_TRIGGER;
			sr_session_send(sdi, &packet);

			/* Send post-trigger samples. */
			packet.type = SR_DF_LOGIC;
			packet.payload = &logic;
			logic.length = (devc->num_samples * 4) - (devc->trigger_at * 4);
			logic.unitsize = 4;
			logic.data = devc->raw_sample_buf + devc->trigger_at * 4 +
				(devc->limit_samples - devc->num_samples) * 4;
			sr_session_send(sdi, &packet);
		} else {
			/* no trigger was used */
			packet.type = SR_DF_LOGIC;
			packet.payload = &logic;
			logic.length = devc->num_samples * 4;
			logic.unitsize = 4;
			logic.data = devc->raw_sample_buf +
				(devc->limit_samples - devc->num_samples) * 4;
			sr_session_send(sdi, &packet);
		}
		g_free(devc->raw_sample_buf);

		sr_dev_acquisition_stop(sdi);
	}

	return TRUE;
}
Commit	Line	Data
4bd80e12	1	/*
	2	* This file is part of the libsigrok project.
	3	*
	4	* Copyright (C) 2013 Bert Vermeulen <bert@biot.com>
	5	*
	6	* This program is free software: you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License as published by
	8	* the Free Software Foundation, either version 3 of the License, or
	9	* (at your option) any later version.
	10	*
	11	* This program is distributed in the hope that it will be useful,
	12	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	14	* GNU General Public License for more details.
	15	*
	16	* You should have received a copy of the GNU General Public License
	17	* along with this program. If not, see <http://www.gnu.org/licenses/>.
	18	*/
	19
6ec6c43b	20	#include <config.h>
4bd80e12	21	#include "protocol.h"
4bd80e12	22
4bd80e12	23	SR_PRIV int write_shortcommand(struct dev_context *devc, uint8_t command)
	24	{
	25	uint8_t buf[1];
	26	int bytes_written;
	27
	28	sr_dbg("Sending cmd 0x%.2x.", command);
	29	buf[0] = command;
	30	bytes_written = ftdi_write_data(devc->ftdic, buf, 1);
	31	if (bytes_written < 0) {
	32	sr_err("Failed to write FTDI data (%d): %s.",
	33	bytes_written, ftdi_get_error_string(devc->ftdic));
	34	return SR_ERR;
	35	} else if (bytes_written != 1) {
	36	sr_err("FTDI write error, only %d/%d bytes written: %s.",
	37	bytes_written, 1, ftdi_get_error_string(devc->ftdic));
	38	return SR_ERR;
	39	}
	40
	41	return SR_OK;
	42	}
	43
	44	SR_PRIV int write_longcommand(struct dev_context devc, uint8_t command, uint8_t data)
	45	{
	46	uint8_t buf[5];
	47	int bytes_written;
	48
	49	sr_dbg("Sending cmd 0x%.2x data 0x%.2x%.2x%.2x%.2x.", command,
	50	data[0], data[1], data[2], data[3]);
	51	buf[0] = command;
	52	buf[1] = data[0];
	53	buf[2] = data[1];
	54	buf[3] = data[2];
	55	buf[4] = data[3];
	56	bytes_written = ftdi_write_data(devc->ftdic, buf, 5);
	57	if (bytes_written < 0) {
	58	sr_err("Failed to write FTDI data (%d): %s.",
	59	bytes_written, ftdi_get_error_string(devc->ftdic));
	60	return SR_ERR;
	61	} else if (bytes_written != 5) {
	62	sr_err("FTDI write error, only %d/%d bytes written: %s.",
	63	bytes_written, 1, ftdi_get_error_string(devc->ftdic));
	64	return SR_ERR;
	65	}
	66
	67	return SR_OK;
	68	}
	69
	70	SR_PRIV int p_ols_open(struct dev_context *devc)
	71	{
	72	int ret;
	73
	74	/* Note: Caller checks devc and devc->ftdic. */
	75
4bd80e12	76	ret = ftdi_set_interface(devc->ftdic, INTERFACE_B);
	77	if (ret < 0) {
	78	sr_err("Failed to set FTDI interface B (%d): %s", ret,
	79	ftdi_get_error_string(devc->ftdic));
	80	return SR_ERR;
	81	}
4bd80e12	82
4bd80e12	83	ret = ftdi_usb_open_desc(devc->ftdic, USB_VENDOR_ID, USB_DEVICE_ID,
	84	USB_IPRODUCT, NULL);
	85	if (ret < 0) {
	86	/* Log errors, except for -3 ("device not found"). */
	87	if (ret != -3)
	88	sr_err("Failed to open device (%d): %s", ret,
	89	ftdi_get_error_string(devc->ftdic));
	90	return SR_ERR;
	91	}
4bd80e12	92
4bd80e12	93	if ((ret = ftdi_usb_purge_buffers(devc->ftdic)) < 0) {
	94	sr_err("Failed to purge FTDI RX/TX buffers (%d): %s.",
	95	ret, ftdi_get_error_string(devc->ftdic));
	96	goto err_open_close_ftdic;
	97	}
4bd80e12	98
4bd80e12	99	ret = ftdi_set_bitmode(devc->ftdic, 0xff, BITMODE_RESET);
	100	if (ret < 0) {
	101	sr_err("Failed to reset the FTDI chip bitmode (%d): %s.",
	102	ret, ftdi_get_error_string(devc->ftdic));
	103	goto err_open_close_ftdic;
	104	}
4bd80e12	105
4bd80e12	106	ret = ftdi_set_latency_timer(devc->ftdic, 16);
	107	if (ret < 0) {
	108	sr_err("Failed to set FTDI latency timer (%d): %s.",
	109	ret, ftdi_get_error_string(devc->ftdic));
	110	goto err_open_close_ftdic;
	111	}
4bd80e12	112
4bd80e12	113	ret = ftdi_read_data_set_chunksize(devc->ftdic, 64 * 1024);
	114	if (ret < 0) {
	115	sr_err("Failed to set FTDI read data chunk size (%d): %s.",
	116	ret, ftdi_get_error_string(devc->ftdic));
	117	goto err_open_close_ftdic;
	118	}
176d785d	119
4bd80e12	120	return SR_OK;
	121
	122	err_open_close_ftdic:
1f9bcd0f	123	ftdi_usb_close(devc->ftdic);
7e463623	124
4bd80e12	125	return SR_ERR;
	126	}
	127
	128	SR_PRIV int p_ols_close(struct dev_context *devc)
	129	{
	130	int ret;
	131
	132	/* Note: Caller checks devc and devc->ftdic. */
	133
	134	if ((ret = ftdi_usb_close(devc->ftdic)) < 0) {
	135	sr_err("Failed to close FTDI device (%d): %s.",
	136	ret, ftdi_get_error_string(devc->ftdic));
	137	return SR_ERR;
	138	}
	139
	140	return SR_OK;
	141	}
	142
acc885c7 BV	143	/* Configures the channel mask based on which channels are enabled. */
acc885c7 BV	144	SR_PRIV void pols_channel_mask(const struct sr_dev_inst *sdi)
4bd80e12	145	{
4bd80e12	146	struct dev_context *devc;
acc885c7	147	struct sr_channel *channel;
4bd80e12	148	const GSList *l;
4bd80e12	149
	150	devc = sdi->priv;
	151
	152	devc->channel_mask = 0;
acc885c7 BV	153	for (l = sdi->channels; l; l = l->next) {
	154	channel = l->data;
	155	if (channel->enabled)
	156	devc->channel_mask \|= 1 << channel->index;
	157	}
	158	}
	159
	160	SR_PRIV int pols_convert_trigger(const struct sr_dev_inst *sdi)
	161	{
	162	struct dev_context *devc;
	163	struct sr_trigger *trigger;
	164	struct sr_trigger_stage *stage;
	165	struct sr_trigger_match *match;
	166	const GSList l, m;
	167	int i;
	168
	169	devc = sdi->priv;
	170
	171	devc->num_stages = 0;
4bd80e12	172	for (i = 0; i < NUM_TRIGGER_STAGES; i++) {
	173	devc->trigger_mask[i] = 0;
	174	devc->trigger_value[i] = 0;
1e0de846	175	devc->trigger_edge[i] = 0;
4bd80e12	176	}
4bd80e12	177
acc885c7 BV	178	if (!(trigger = sr_session_trigger_get(sdi->session)))
acc885c7 BV	179	return SR_OK;
4bd80e12	180
acc885c7 BV	181	devc->num_stages = g_slist_length(trigger->stages);
	182	if (devc->num_stages > NUM_TRIGGER_STAGES) {
	183	sr_err("This device only supports %d trigger stages.",
	184	NUM_TRIGGER_STAGES);
	185	return SR_ERR;
	186	}
4bd80e12	187
acc885c7 BV	188	for (l = trigger->stages; l; l = l->next) {
	189	stage = l->data;
	190	for (m = stage->matches; m; m = m->next) {
	191	match = m->data;
	192	if (!match->channel->enabled)
	193	/* Ignore disabled channels with a trigger. */
	194	continue;
	195	devc->trigger_mask[stage->stage] \|= 1 << match->channel->index;
	196	if (match->match == SR_TRIGGER_ONE \|\| match->match == SR_TRIGGER_RISING)
	197	devc->trigger_value[stage->stage] \|= 1 << match->channel->index;
	198	if (match->match == SR_TRIGGER_RISING \|\| match->match == SR_TRIGGER_FALLING)
	199	devc->trigger_edge[stage->stage] \|= 1 << match->channel->index;
4bd80e12	200	}
4bd80e12	201	}
	202
	203	return SR_OK;
	204	}
	205
	206	SR_PRIV struct sr_dev_inst p_ols_get_metadata(uint8_t buf, int bytes_read, struct dev_context *devc)
	207	{
	208	struct sr_dev_inst *sdi;
4bd80e12	209	uint32_t tmp_int, ui;
	210	uint8_t key, type, token;
	211	GString tmp_str, devname, *version;
	212	guchar tmp_c;
	213	int index, i;
	214
aac29cc1	215	sdi = g_malloc0(sizeof(struct sr_dev_inst));
0af636be	216	sdi->status = SR_ST_INACTIVE;
4bd80e12	217	sdi->priv = devc;
	218
	219	devname = g_string_new("");
	220	version = g_string_new("");
	221
	222	index = 0;
	223	while (index < bytes_read) {
	224	key = buf[index++];
	225	if (key == 0x00) {
	226	sr_dbg("Got metadata key 0x00, metadata ends.");
	227	break;
	228	}
	229	type = key >> 5;
	230	token = key & 0x1f;
	231	switch (type) {
	232	case 0:
	233	/* NULL-terminated string */
	234	tmp_str = g_string_new("");
	235	while ((index < bytes_read) && ((tmp_c = buf[index++]) != '\0'))
	236	g_string_append_c(tmp_str, tmp_c);
	237	sr_dbg("Got metadata key 0x%.2x value '%s'.",
	238	key, tmp_str->str);
	239	switch (token) {
	240	case 0x01:
	241	/* Device name */
	242	devname = g_string_append(devname, tmp_str->str);
	243	break;
	244	case 0x02:
	245	/* FPGA firmware version */
	246	if (version->len)
	247	g_string_append(version, ", ");
	248	g_string_append(version, "FPGA version ");
	249	g_string_append(version, tmp_str->str);
	250	break;
	251	case 0x03:
	252	/* Ancillary version */
	253	if (version->len)
	254	g_string_append(version, ", ");
	255	g_string_append(version, "Ancillary version ");
	256	g_string_append(version, tmp_str->str);
	257	break;
	258	default:
	259	sr_info("Unknown token 0x%.2x: '%s'",
	260	token, tmp_str->str);
	261	break;
	262	}
	263	g_string_free(tmp_str, TRUE);
	264	break;
	265	case 1:
	266	/* 32-bit unsigned integer */
	267	tmp_int = 0;
	268	for (i = 0; i < 4; i++) {
	269	tmp_int = (tmp_int << 8) \| buf[index++];
	270	}
	271	sr_dbg("Got metadata key 0x%.2x value 0x%.8x.",
	272	key, tmp_int);
	273	switch (token) {
	274	case 0x00:
	275	/* Number of usable channels */
5e23fcab ML	276	for (ui = 0; ui < tmp_int; ui++)
5e23fcab ML	277	sr_channel_new(sdi, ui, SR_CHANNEL_LOGIC, TRUE,
c368e6f3	278	p_ols_channel_names[ui]);
4bd80e12	279	break;
	280	case 0x01:
	281	/* Amount of sample memory available (bytes) */
b94cff40	282	devc->max_samplebytes = tmp_int;
4bd80e12	283	break;
	284	case 0x02:
	285	/* Amount of dynamic memory available (bytes) */
	286	/* what is this for? */
	287	break;
	288	case 0x03:
f3f19d11	289	/* Maximum sample rate (Hz) */
4bd80e12	290	devc->max_samplerate = tmp_int;
	291	break;
	292	case 0x04:
	293	/* protocol version */
	294	devc->protocol_version = tmp_int;
	295	break;
	296	default:
	297	sr_info("Unknown token 0x%.2x: 0x%.8x.",
	298	token, tmp_int);
	299	break;
	300	}
	301	break;
	302	case 2:
	303	/* 8-bit unsigned integer */
	304	tmp_c = buf[index++];
	305	sr_dbg("Got metadata key 0x%.2x value 0x%.2x.",
	306	key, tmp_c);
	307	switch (token) {
	308	case 0x00:
	309	/* Number of usable channels */
5e23fcab ML	310	for (ui = 0; ui < tmp_c; ui++)
5e23fcab ML	311	sr_channel_new(sdi, ui, SR_CHANNEL_LOGIC, TRUE,
c368e6f3	312	p_ols_channel_names[ui]);
4bd80e12	313	break;
	314	case 0x01:
	315	/* protocol version */
	316	devc->protocol_version = tmp_c;
	317	break;
	318	default:
	319	sr_info("Unknown token 0x%.2x: 0x%.2x.",
	320	token, tmp_c);
	321	break;
	322	}
	323	break;
	324	default:
	325	/* unknown type */
	326	break;
	327	}
	328	}
	329
	330	sdi->model = devname->str;
	331	sdi->version = version->str;
	332	g_string_free(devname, FALSE);
	333	g_string_free(version, FALSE);
	334
	335	return sdi;
	336	}
	337
	338	SR_PRIV int p_ols_set_samplerate(const struct sr_dev_inst *sdi,
	339	const uint64_t samplerate)
	340	{
	341	struct dev_context *devc;
	342
	343	devc = sdi->priv;
	344	if (devc->max_samplerate && samplerate > devc->max_samplerate)
	345	return SR_ERR_SAMPLERATE;
	346
	347	if (samplerate > CLOCK_RATE) {
	348	sr_info("Enabling demux mode.");
	349	devc->flag_reg \|= FLAG_DEMUX;
	350	devc->flag_reg &= ~FLAG_FILTER;
	351	devc->max_channels = NUM_CHANNELS / 2;
	352	devc->cur_samplerate_divider = (CLOCK_RATE * 2 / samplerate) - 1;
	353	} else {
	354	sr_info("Disabling demux mode.");
	355	devc->flag_reg &= ~FLAG_DEMUX;
	356	devc->flag_reg \|= FLAG_FILTER;
	357	devc->max_channels = NUM_CHANNELS;
	358	devc->cur_samplerate_divider = (CLOCK_RATE / samplerate) - 1;
	359	}
	360
	361	/* Calculate actual samplerate used and complain if it is different
	362	* from the requested.
	363	*/
	364	devc->cur_samplerate = CLOCK_RATE / (devc->cur_samplerate_divider + 1);
	365	if (devc->flag_reg & FLAG_DEMUX)
	366	devc->cur_samplerate *= 2;
	367	if (devc->cur_samplerate != samplerate)
	368	sr_info("Can't match samplerate %" PRIu64 ", using %"
	369	PRIu64 ".", samplerate, devc->cur_samplerate);
	370
	371	return SR_OK;
	372	}
	373
4bd80e12	374	SR_PRIV int p_ols_receive_data(int fd, int revents, void *cb_data)
	375	{
	376	struct dev_context *devc;
	377	struct sr_dev_inst *sdi;
	378	struct sr_datafeed_packet packet;
	379	struct sr_datafeed_logic logic;
	380	uint32_t sample;
	381	int num_channels, offset, j;
	382	int bytes_read, index;
	383	unsigned int i;
	384	unsigned char byte;
	385
	386	(void)fd;
	387	(void)revents;
	388
	389	sdi = cb_data;
	390	devc = sdi->priv;
	391
	392	if (devc->num_transfers++ == 0) {
	393	devc->raw_sample_buf = g_try_malloc(devc->limit_samples * 4);
	394	if (!devc->raw_sample_buf) {
	395	sr_err("Sample buffer malloc failed.");
	396	return FALSE;
	397	}
	398	/* fill with 1010... for debugging */
	399	memset(devc->raw_sample_buf, 0x82, devc->limit_samples * 4);
	400	}
	401
b94cff40	402	if ((devc->num_samples < devc->limit_samples) && (devc->cnt_samples < devc->max_samples)) {
4bd80e12	403
	404	num_channels = 0;
	405	for (i = NUM_CHANNELS; i > 0x02; i /= 2) {
	406	if ((devc->flag_reg & i) == 0) {
	407	num_channels++;
	408	}
	409	}
	410
	411	/* Get a block of data. */
	412	bytes_read = ftdi_read_data(devc->ftdic, devc->ftdi_buf, FTDI_BUF_SIZE);
	413	if (bytes_read < 0) {
	414	sr_err("Failed to read FTDI data (%d): %s.",
	415	bytes_read, ftdi_get_error_string(devc->ftdic));
d2f7c417	416	sr_dev_acquisition_stop(sdi);
4bd80e12	417	return FALSE;
	418	}
	419	if (bytes_read == 0) {
	420	sr_spew("Received 0 bytes, nothing to do.");
	421	return TRUE;
	422	}
	423
	424	sr_dbg("Received %d bytes", bytes_read);
	425
	426	index = 0;
	427	while (index < bytes_read) {
	428	byte = devc->ftdi_buf[index++];
	429	devc->cnt_bytes++;
	430
	431	devc->sample[devc->num_bytes++] = byte;
	432	sr_spew("Received byte 0x%.2x.", byte);
b94cff40	433
b94cff40	434	if ((devc->flag_reg & FLAG_DEMUX) && (devc->flag_reg & FLAG_RLE)) {
176d785d	435	/* RLE in demux mode must be processed differently
b94cff40	436	* since in this case the RLE encoder is operating on pairs of samples.
	437	*/
	438	if (devc->num_bytes == num_channels * 2) {
	439	devc->cnt_samples += 2;
	440	devc->cnt_samples_rle += 2;
4bd80e12	441	/*
b94cff40	442	* Got a sample pair. Convert from the OLS's little-endian
	443	* sample to the local format.
	444	*/
	445	sample = devc->sample[0] \| (devc->sample[1] << 8) \
	446	\| (devc->sample[2] << 16) \| (devc->sample[3] << 24);
	447	sr_spew("Received sample pair 0x%.x.", devc->num_bytes 2, sample);
	448
	449	/*
	450	* In RLE mode the high bit of the sample pair is the
	451	* "count" flag, meaning this sample pair is the number
	452	* of times the previous sample pair occurred.
4bd80e12	453	*/
	454	if (devc->sample[devc->num_bytes - 1] & 0x80) {
	455	/* Clear the high bit. */
	456	sample &= ~(0x80 << (devc->num_bytes - 1) * 8);
	457	devc->rle_count = sample;
b94cff40	458	devc->cnt_samples_rle += devc->rle_count * 2;
b94cff40	459	sr_dbg("RLE count: %u.", devc->rle_count * 2);
4bd80e12	460	devc->num_bytes = 0;
	461	continue;
	462	}
b94cff40	463	devc->num_samples += (devc->rle_count + 1) * 2;
	464	if (devc->num_samples > devc->limit_samples) {
	465	/* Save us from overrunning the buffer. */
	466	devc->rle_count -= (devc->num_samples - devc->limit_samples) / 2;
	467	devc->num_samples = devc->limit_samples;
	468	index = bytes_read;
	469	}
4bd80e12	470
4bd80e12	471	/*
	472	* Some channel groups may have been turned
	473	* off, to speed up transfer between the
	474	* hardware and the PC. Expand that here before
	475	* submitting it over the session bus --
	476	* whatever is listening on the bus will be
	477	* expecting a full 32-bit sample, based on
	478	* the number of channels.
	479	*/
	480	j = 0;
b94cff40	481	/* expand first sample */
4bd80e12	482	memset(devc->tmp_sample, 0, 4);
b94cff40	483	for (i = 0; i < 2; i++) {
4bd80e12	484	if (((devc->flag_reg >> 2) & (1 << i)) == 0) {
	485	/*
	486	* This channel group was
	487	* enabled, copy from received
	488	* sample.
	489	*/
	490	devc->tmp_sample[i] = devc->sample[j++];
176d785d	491	}
4bd80e12	492	}
b94cff40	493	/* Clear out the most significant bit of the sample */
b94cff40	494	devc->tmp_sample[devc->num_bytes - 1] &= 0x7f;
6433156c DE	495	sr_spew("Expanded sample 1: 0x%.2x%.2x%.2x%.2x.",
	496	devc->tmp_sample[3], devc->tmp_sample[2],
	497	devc->tmp_sample[1], devc->tmp_sample[0]);
b94cff40	498
	499	/* expand second sample */
	500	memset(devc->tmp_sample2, 0, 4);
	501	for (i = 0; i < 2; i++) {
	502	if (((devc->flag_reg >> 2) & (1 << i)) == 0) {
	503	/*
	504	* This channel group was
	505	* enabled, copy from received
	506	* sample.
	507	*/
	508	devc->tmp_sample2[i] = devc->sample[j++];
176d785d	509	}
b94cff40	510	}
	511	/* Clear out the most significant bit of the sample */
	512	devc->tmp_sample2[devc->num_bytes - 1] &= 0x7f;
6433156c DE	513	sr_spew("Expanded sample 2: 0x%.2x%.2x%.2x%.2x.",
	514	devc->tmp_sample2[3], devc->tmp_sample2[2],
	515	devc->tmp_sample2[1], devc->tmp_sample2[0]);
b94cff40	516
	517	/*
	518	* OLS sends its sample buffer backwards.
	519	* store it in reverse order here, so we can dump
	520	* this on the session bus later.
	521	*/
	522	offset = (devc->limit_samples - devc->num_samples) * 4;
	523	for (i = 0; i <= devc->rle_count; i++) {
	524	memcpy(devc->raw_sample_buf + offset + (i * 8),
	525	devc->tmp_sample2, 4);
	526	memcpy(devc->raw_sample_buf + offset + (4 + (i * 8)),
	527	devc->tmp_sample, 4);
	528	}
	529	memset(devc->sample, 0, 4);
	530	devc->num_bytes = 0;
	531	devc->rle_count = 0;
4bd80e12	532	}
b94cff40	533	}
	534	else {
	535	if (devc->num_bytes == num_channels) {
	536	devc->cnt_samples++;
	537	devc->cnt_samples_rle++;
	538	/*
	539	* Got a full sample. Convert from the OLS's little-endian
	540	* sample to the local format.
	541	*/
	542	sample = devc->sample[0] \| (devc->sample[1] << 8) \
	543	\| (devc->sample[2] << 16) \| (devc->sample[3] << 24);
	544	sr_spew("Received sample 0x%.x.", devc->num_bytes 2, sample);
	545	if (devc->flag_reg & FLAG_RLE) {
	546	/*
	547	* In RLE mode the high bit of the sample is the
	548	* "count" flag, meaning this sample is the number
	549	* of times the previous sample occurred.
	550	*/
	551	if (devc->sample[devc->num_bytes - 1] & 0x80) {
	552	/* Clear the high bit. */
	553	sample &= ~(0x80 << (devc->num_bytes - 1) * 8);
	554	devc->rle_count = sample;
	555	devc->cnt_samples_rle += devc->rle_count;
	556	sr_dbg("RLE count: %u.", devc->rle_count);
	557	devc->num_bytes = 0;
	558	continue;
	559	}
	560	}
	561	devc->num_samples += devc->rle_count + 1;
	562	if (devc->num_samples > devc->limit_samples) {
	563	/* Save us from overrunning the buffer. */
	564	devc->rle_count -= devc->num_samples - devc->limit_samples;
	565	devc->num_samples = devc->limit_samples;
	566	index = bytes_read;
	567	}
	568
	569	if (num_channels < 4) {
	570	/*
	571	* Some channel groups may have been turned
	572	* off, to speed up transfer between the
	573	* hardware and the PC. Expand that here before
	574	* submitting it over the session bus --
	575	* whatever is listening on the bus will be
	576	* expecting a full 32-bit sample, based on
	577	* the number of channels.
	578	*/
	579	j = 0;
	580	memset(devc->tmp_sample, 0, 4);
	581	for (i = 0; i < 4; i++) {
	582	if (((devc->flag_reg >> 2) & (1 << i)) == 0) {
	583	/*
	584	* This channel group was
	585	* enabled, copy from received
	586	* sample.
	587	*/
	588	devc->tmp_sample[i] = devc->sample[j++];
176d785d	589	}
b94cff40	590	}
	591	memcpy(devc->sample, devc->tmp_sample, 4);
	592	sr_spew("Expanded sample: 0x%.8x.", sample);
	593	}
4bd80e12	594
b94cff40	595	/*
	596	* Pipistrello OLS sends its sample buffer backwards.
	597	* store it in reverse order here, so we can dump
	598	* this on the session bus later.
	599	*/
	600	offset = (devc->limit_samples - devc->num_samples) * 4;
	601	for (i = 0; i <= devc->rle_count; i++) {
	602	memcpy(devc->raw_sample_buf + offset + (i * 4),
	603	devc->sample, 4);
	604	}
	605	memset(devc->sample, 0, 4);
	606	devc->num_bytes = 0;
	607	devc->rle_count = 0;
4bd80e12	608	}
4bd80e12	609	}
	610	}
	611	return TRUE;
	612	} else {
dc89faea UH	613	do {
	614	bytes_read = ftdi_read_data(devc->ftdic, devc->ftdi_buf, FTDI_BUF_SIZE);
	615	} while (bytes_read > 0);
b94cff40	616
4bd80e12	617	/*
	618	* We've acquired all the samples we asked for -- we're done.
	619	* Send the (properly-ordered) buffer to the frontend.
	620	*/
	621	sr_dbg("Received %d bytes, %d samples, %d decompressed samples.",
	622	devc->cnt_bytes, devc->cnt_samples,
	623	devc->cnt_samples_rle);
	624	if (devc->trigger_at != -1) {
	625	/*
	626	* A trigger was set up, so we need to tell the frontend
	627	* about it.
	628	*/
	629	if (devc->trigger_at > 0) {
	630	/* There are pre-trigger samples, send those first. */
	631	packet.type = SR_DF_LOGIC;
	632	packet.payload = &logic;
	633	logic.length = devc->trigger_at * 4;
	634	logic.unitsize = 4;
	635	logic.data = devc->raw_sample_buf +
	636	(devc->limit_samples - devc->num_samples) * 4;
695dc859	637	sr_session_send(sdi, &packet);
4bd80e12	638	}
	639
	640	/* Send the trigger. */
	641	packet.type = SR_DF_TRIGGER;
695dc859	642	sr_session_send(sdi, &packet);
4bd80e12	643
	644	/* Send post-trigger samples. */
	645	packet.type = SR_DF_LOGIC;
	646	packet.payload = &logic;
	647	logic.length = (devc->num_samples * 4) - (devc->trigger_at * 4);
	648	logic.unitsize = 4;
	649	logic.data = devc->raw_sample_buf + devc->trigger_at * 4 +
	650	(devc->limit_samples - devc->num_samples) * 4;
695dc859	651	sr_session_send(sdi, &packet);
4bd80e12	652	} else {
	653	/* no trigger was used */
	654	packet.type = SR_DF_LOGIC;
	655	packet.payload = &logic;
	656	logic.length = devc->num_samples * 4;
	657	logic.unitsize = 4;
	658	logic.data = devc->raw_sample_buf +
	659	(devc->limit_samples - devc->num_samples) * 4;
695dc859	660	sr_session_send(sdi, &packet);
4bd80e12	661	}
	662	g_free(devc->raw_sample_buf);
	663
d2f7c417	664	sr_dev_acquisition_stop(sdi);
4bd80e12	665	}
	666
	667	return TRUE;
	668	}