[libsigrok.git] / src / hardware / kecheng-kc-330b / 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 <string.h>
#include "protocol.h"

extern const uint64_t kecheng_kc_330b_sample_intervals[][2];

SR_PRIV int kecheng_kc_330b_handle_events(int fd, int revents, void *cb_data)
{
	struct sr_dev_driver *di;
	struct drv_context *drvc;
	struct dev_context *devc;
	struct sr_dev_inst *sdi;
	struct sr_usb_dev_inst *usb;
	struct timeval tv;
	const uint64_t *intv_entry;
	gint64 now, interval;
	int offset, len, ret;
	unsigned char buf[4];

	(void)fd;
	(void)revents;

	sdi = cb_data;
	devc = sdi->priv;
	usb = sdi->conn;
	di = sdi->driver;
	drvc = di->context;

	memset(&tv, 0, sizeof(struct timeval));
	libusb_handle_events_timeout_completed(drvc->sr_ctx->libusb_ctx, &tv,
					       NULL);

	if (sdi->status == SR_ST_STOPPING) {
		libusb_free_transfer(devc->xfer);
		usb_source_remove(sdi->session, drvc->sr_ctx);
		std_session_send_df_end(sdi);
		sdi->status = SR_ST_ACTIVE;
		return TRUE;
	}

	if (devc->state == LIVE_SPL_IDLE) {
		/* Request samples at the interval rate. */
		now = g_get_monotonic_time() / 1000;
		intv_entry = kecheng_kc_330b_sample_intervals[devc->sample_interval];
		interval = intv_entry[0] * 1000 / intv_entry[1];
		if (now - devc->last_live_request > interval) {
			buf[0] = CMD_GET_LIVE_SPL;
			ret = libusb_bulk_transfer(usb->devhdl, EP_OUT, buf, 1, &len, 5);
			if (ret != 0 || len != 1) {
				sr_dbg("Failed to request new acquisition: %s",
						libusb_error_name(ret));
				sr_dev_acquisition_stop(sdi);
				return TRUE;
			}
			libusb_submit_transfer(devc->xfer);
			devc->last_live_request = now;
			devc->state = LIVE_SPL_WAIT;
		}
	} else if (devc->state == LIVE_SPL_IDLE) {
		buf[0] = CMD_GET_LOG_DATA;
		offset = devc->num_samples / 63;
		buf[1] = (offset >> 8) & 0xff;
		buf[2] = offset & 0xff;
		if (devc->stored_samples - devc->num_samples > 63)
			buf[3] = 63;
		else
			/* Last chunk. */
			buf[3] = devc->stored_samples - devc->num_samples;
		ret = libusb_bulk_transfer(usb->devhdl, EP_OUT, buf, 4, &len, 5);
		if (ret != 0 || len != 4) {
			sr_dbg("Failed to request next chunk: %s",
					libusb_error_name(ret));
			sr_dev_acquisition_stop(sdi);
			return TRUE;
		}
		libusb_submit_transfer(devc->xfer);
		devc->state = LIVE_SPL_WAIT;
	}

	return TRUE;
}

static void send_data(const struct sr_dev_inst *sdi, void *buf, unsigned int buf_len)
{
	struct dev_context *devc;
	struct sr_datafeed_packet packet;
	struct sr_datafeed_analog analog;
	struct sr_analog_encoding encoding;
	struct sr_analog_meaning meaning;
	struct sr_analog_spec spec;

	devc = sdi->priv;

	sr_analog_init(&analog, &encoding, &meaning, &spec, 1);
	analog.meaning->mq = SR_MQ_SOUND_PRESSURE_LEVEL;
	analog.meaning->mqflags = devc->mqflags;
	analog.meaning->unit = SR_UNIT_DECIBEL_SPL;
	analog.meaning->channels = sdi->channels;
	analog.num_samples = buf_len;
	analog.data = buf;
	packet.type = SR_DF_ANALOG;
	packet.payload = &analog;
	sr_session_send(sdi, &packet);
}

SR_PRIV void LIBUSB_CALL kecheng_kc_330b_receive_transfer(struct libusb_transfer *transfer)
{
	struct dev_context *devc;
	struct sr_dev_inst *sdi;
	float fvalue[64];
	int packet_has_error, num_samples, i;

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

	packet_has_error = FALSE;
	switch (transfer->status) {
	case LIBUSB_TRANSFER_NO_DEVICE:
		/* USB device was unplugged. */
		sr_dev_acquisition_stop(sdi);
		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 (packet_has_error)
		return;

	if (devc->state == LIVE_SPL_WAIT) {
		if (transfer->actual_length != 3 || transfer->buffer[0] != 0x88) {
			sr_dbg("Received invalid SPL packet.");
		} else {
			fvalue[0] = ((transfer->buffer[1] << 8) + transfer->buffer[2]) / 10.0;
			send_data(sdi, fvalue, 1);
			devc->num_samples++;
			if (devc->limit_samples && devc->num_samples >= devc->limit_samples) {
				sr_dev_acquisition_stop(sdi);
			} else {
				/* let USB event handler fire off another
				 * request when the time is right. */
				devc->state = LIVE_SPL_IDLE;
			}
		}
	} else if (devc->state == LOG_DATA_WAIT) {
		if (transfer->actual_length < 1 || !(transfer->actual_length & 0x01)) {
			sr_dbg("Received invalid stored SPL packet.");
		} else {
			num_samples = (transfer->actual_length - 1) / 2;
			for (i = 0; i < num_samples; i++) {
				fvalue[i] = transfer->buffer[1 + i * 2] << 8;
				fvalue[i] += transfer->buffer[1 + i * 2 + 1];
				fvalue[i] /= 10.0;
			}
			send_data(sdi, fvalue, 1);
			devc->num_samples += num_samples;
			if (devc->num_samples >= devc->stored_samples) {
				sr_dev_acquisition_stop(sdi);
			} else {
				/* let USB event handler fire off another
				 * request when the time is right. */
				devc->state = LOG_DATA_IDLE;
			}
		}
	}

}

SR_PRIV int kecheng_kc_330b_configure(const struct sr_dev_inst *sdi)
{
	struct dev_context *devc;
	struct sr_usb_dev_inst *usb;
	int len, ret;
	unsigned char buf[7];

	sr_dbg("Configuring device.");

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

	buf[0] = CMD_CONFIGURE;
	buf[1] = devc->sample_interval;
	buf[2] = devc->alarm_low;
	buf[3] = devc->alarm_high;
	buf[4] = devc->mqflags & SR_MQFLAG_SPL_TIME_WEIGHT_F ? 0 : 1;
	buf[5] = devc->mqflags & SR_MQFLAG_SPL_FREQ_WEIGHT_A ? 0 : 1;
	buf[6] = devc->data_source;
	ret = libusb_bulk_transfer(usb->devhdl, EP_OUT, buf, 7, &len, 5);
	if (ret != 0 || len != 7) {
		sr_dbg("Failed to configure device: %s", libusb_error_name(ret));
		return SR_ERR;
	}

	/* The configure command ack takes about 32ms to come in. */
	ret = libusb_bulk_transfer(usb->devhdl, EP_IN, buf, 1, &len, 40);
	if (ret != 0 || len != 1) {
		sr_dbg("Failed to configure device (no ack): %s", libusb_error_name(ret));
		return SR_ERR;
	}
	if (buf[0] != (CMD_CONFIGURE | 0x80)) {
		sr_dbg("Failed to configure device: invalid response 0x%2.x", buf[0]);
		return SR_ERR;
	}

	devc->config_dirty = FALSE;

	return SR_OK;
}

SR_PRIV int kecheng_kc_330b_set_date_time(struct sr_dev_inst *sdi)
{
	struct sr_usb_dev_inst *usb;
	GDateTime *dt;
	int len, ret;
	unsigned char buf[7];

	sr_dbg("Setting device date/time.");

	usb = sdi->conn;

	dt = g_date_time_new_now_local();
	buf[0] = CMD_SET_DATE_TIME;
	buf[1] = g_date_time_get_year(dt) - 2000;
	buf[2] = g_date_time_get_month(dt);
	buf[3] = g_date_time_get_day_of_month(dt);
	buf[4] = g_date_time_get_hour(dt);
	buf[5] = g_date_time_get_minute(dt);
	buf[6] = g_date_time_get_second(dt);
	g_date_time_unref(dt);
	ret = libusb_bulk_transfer(usb->devhdl, EP_OUT, buf, 7, &len, 5);
	if (ret != 0 || len != 7) {
		sr_dbg("Failed to set date/time: %s", libusb_error_name(ret));
		return SR_ERR;
	}

	ret = libusb_bulk_transfer(usb->devhdl, EP_IN, buf, 1, &len, 10);
	if (ret != 0 || len != 1) {
		sr_dbg("Failed to set date/time (no ack): %s", libusb_error_name(ret));
		return SR_ERR;
	}
	if (buf[0] != (CMD_SET_DATE_TIME | 0x80)) {
		sr_dbg("Failed to set date/time: invalid response 0x%2.x", buf[0]);
		return SR_ERR;
	}

	return SR_OK;
}

SR_PRIV int kecheng_kc_330b_status_get(const struct sr_dev_inst *sdi,
		int *status)
{
	struct sr_usb_dev_inst *usb;
	int len, ret;
	unsigned char buf;

	sr_dbg("Getting device status.");

	usb = sdi->conn;
	buf = CMD_GET_STATUS;
	ret = libusb_bulk_transfer(usb->devhdl, EP_OUT, &buf, 1, &len, 5);
	if (ret != 0 || len != 1) {
		sr_dbg("Failed to get status: %s", libusb_error_name(ret));
		return SR_ERR;
	}

	ret = libusb_bulk_transfer(usb->devhdl, EP_IN, &buf, 1, &len, 10);
	if (ret != 0 || len != 1) {
		sr_dbg("Failed to get status (no ack): %s", libusb_error_name(ret));
		return SR_ERR;
	}
	/* Need either 0x84 or 0xa4. */
	if (buf != (CMD_GET_STATUS | 0x80) && buf != (CMD_GET_STATUS | 0xa0)) {
		sr_dbg("Failed to get status: invalid response 0x%2.x", buf);
		return SR_ERR;
	}

	if (buf & 0x20)
		*status = DEVICE_INACTIVE;
	else
		*status = DEVICE_ACTIVE;

	return SR_OK;
}

SR_PRIV int kecheng_kc_330b_log_info_get(const struct sr_dev_inst *sdi,
		unsigned char *buf)
{
	struct sr_usb_dev_inst *usb;
	int len, ret;

	sr_dbg("Getting logging info.");

	usb = sdi->conn;
	buf[0] = CMD_GET_LOG_INFO;
	ret = libusb_bulk_transfer(usb->devhdl, EP_OUT, buf, 1, &len, 5);
	if (ret != 0 || len != 1) {
		sr_dbg("Failed to get status: %s", libusb_error_name(ret));
		return SR_ERR;
	}

	ret = libusb_bulk_transfer(usb->devhdl, EP_IN, buf, 9, &len, 10);
	if (ret != 0 || len != 9) {
		sr_dbg("Failed to get status (no ack): %s", libusb_error_name(ret));
		return SR_ERR;
	}
	if (buf[0] != (CMD_GET_LOG_INFO | 0x80) || buf[1] > 6) {
		sr_dbg("Failed to get log info: invalid response 0x%2.x", buf[0]);
		return SR_ERR;
	}

	return SR_OK;
}
Commit	Line	Data
	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
	20	#include <config.h>
	21	#include <string.h>
	22	#include "protocol.h"
	23
	24	extern const uint64_t kecheng_kc_330b_sample_intervals[][2];
	25
	26	SR_PRIV int kecheng_kc_330b_handle_events(int fd, int revents, void *cb_data)
	27	{
	28	struct sr_dev_driver *di;
	29	struct drv_context *drvc;
	30	struct dev_context *devc;
	31	struct sr_dev_inst *sdi;
	32	struct sr_usb_dev_inst *usb;
	33	struct timeval tv;
	34	const uint64_t *intv_entry;
	35	gint64 now, interval;
	36	int offset, len, ret;
	37	unsigned char buf[4];
	38
	39	(void)fd;
	40	(void)revents;
	41
	42	sdi = cb_data;
	43	devc = sdi->priv;
	44	usb = sdi->conn;
	45	di = sdi->driver;
	46	drvc = di->context;
	47
	48	memset(&tv, 0, sizeof(struct timeval));
	49	libusb_handle_events_timeout_completed(drvc->sr_ctx->libusb_ctx, &tv,
	50	NULL);
	51
	52	if (sdi->status == SR_ST_STOPPING) {
	53	libusb_free_transfer(devc->xfer);
	54	usb_source_remove(sdi->session, drvc->sr_ctx);
	55	std_session_send_df_end(sdi);
	56	sdi->status = SR_ST_ACTIVE;
	57	return TRUE;
	58	}
	59
	60	if (devc->state == LIVE_SPL_IDLE) {
	61	/* Request samples at the interval rate. */
	62	now = g_get_monotonic_time() / 1000;
	63	intv_entry = kecheng_kc_330b_sample_intervals[devc->sample_interval];
	64	interval = intv_entry[0] * 1000 / intv_entry[1];
	65	if (now - devc->last_live_request > interval) {
	66	buf[0] = CMD_GET_LIVE_SPL;
	67	ret = libusb_bulk_transfer(usb->devhdl, EP_OUT, buf, 1, &len, 5);
	68	if (ret != 0 \|\| len != 1) {
	69	sr_dbg("Failed to request new acquisition: %s",
	70	libusb_error_name(ret));
	71	sr_dev_acquisition_stop(sdi);
	72	return TRUE;
	73	}
	74	libusb_submit_transfer(devc->xfer);
	75	devc->last_live_request = now;
	76	devc->state = LIVE_SPL_WAIT;
	77	}
	78	} else if (devc->state == LIVE_SPL_IDLE) {
	79	buf[0] = CMD_GET_LOG_DATA;
	80	offset = devc->num_samples / 63;
	81	buf[1] = (offset >> 8) & 0xff;
	82	buf[2] = offset & 0xff;
	83	if (devc->stored_samples - devc->num_samples > 63)
	84	buf[3] = 63;
	85	else
	86	/* Last chunk. */
	87	buf[3] = devc->stored_samples - devc->num_samples;
	88	ret = libusb_bulk_transfer(usb->devhdl, EP_OUT, buf, 4, &len, 5);
	89	if (ret != 0 \|\| len != 4) {
	90	sr_dbg("Failed to request next chunk: %s",
	91	libusb_error_name(ret));
	92	sr_dev_acquisition_stop(sdi);
	93	return TRUE;
	94	}
	95	libusb_submit_transfer(devc->xfer);
	96	devc->state = LIVE_SPL_WAIT;
	97	}
	98
	99	return TRUE;
	100	}
	101
	102	static void send_data(const struct sr_dev_inst sdi, void buf, unsigned int buf_len)
	103	{
	104	struct dev_context *devc;
	105	struct sr_datafeed_packet packet;
	106	struct sr_datafeed_analog analog;
	107	struct sr_analog_encoding encoding;
	108	struct sr_analog_meaning meaning;
	109	struct sr_analog_spec spec;
	110
	111	devc = sdi->priv;
	112
	113	sr_analog_init(&analog, &encoding, &meaning, &spec, 1);
	114	analog.meaning->mq = SR_MQ_SOUND_PRESSURE_LEVEL;
	115	analog.meaning->mqflags = devc->mqflags;
	116	analog.meaning->unit = SR_UNIT_DECIBEL_SPL;
	117	analog.meaning->channels = sdi->channels;
	118	analog.num_samples = buf_len;
	119	analog.data = buf;
	120	packet.type = SR_DF_ANALOG;
	121	packet.payload = &analog;
	122	sr_session_send(sdi, &packet);
	123	}
	124
	125	SR_PRIV void LIBUSB_CALL kecheng_kc_330b_receive_transfer(struct libusb_transfer *transfer)
	126	{
	127	struct dev_context *devc;
	128	struct sr_dev_inst *sdi;
	129	float fvalue[64];
	130	int packet_has_error, num_samples, i;
	131
	132	sdi = transfer->user_data;
	133	devc = sdi->priv;
	134
	135	packet_has_error = FALSE;
	136	switch (transfer->status) {
	137	case LIBUSB_TRANSFER_NO_DEVICE:
	138	/* USB device was unplugged. */
	139	sr_dev_acquisition_stop(sdi);
	140	return;
	141	case LIBUSB_TRANSFER_COMPLETED:
	142	case LIBUSB_TRANSFER_TIMED_OUT: /* We may have received some data though */
	143	break;
	144	default:
	145	packet_has_error = TRUE;
	146	break;
	147	}
	148
	149	if (packet_has_error)
	150	return;
	151
	152	if (devc->state == LIVE_SPL_WAIT) {
	153	if (transfer->actual_length != 3 \|\| transfer->buffer[0] != 0x88) {
	154	sr_dbg("Received invalid SPL packet.");
	155	} else {
	156	fvalue[0] = ((transfer->buffer[1] << 8) + transfer->buffer[2]) / 10.0;
	157	send_data(sdi, fvalue, 1);
	158	devc->num_samples++;
	159	if (devc->limit_samples && devc->num_samples >= devc->limit_samples) {
	160	sr_dev_acquisition_stop(sdi);
	161	} else {
	162	/* let USB event handler fire off another
	163	* request when the time is right. */
	164	devc->state = LIVE_SPL_IDLE;
	165	}
	166	}
	167	} else if (devc->state == LOG_DATA_WAIT) {
	168	if (transfer->actual_length < 1 \|\| !(transfer->actual_length & 0x01)) {
	169	sr_dbg("Received invalid stored SPL packet.");
	170	} else {
	171	num_samples = (transfer->actual_length - 1) / 2;
	172	for (i = 0; i < num_samples; i++) {
	173	fvalue[i] = transfer->buffer[1 + i * 2] << 8;
	174	fvalue[i] += transfer->buffer[1 + i * 2 + 1];
	175	fvalue[i] /= 10.0;
	176	}
	177	send_data(sdi, fvalue, 1);
	178	devc->num_samples += num_samples;
	179	if (devc->num_samples >= devc->stored_samples) {
	180	sr_dev_acquisition_stop(sdi);
	181	} else {
	182	/* let USB event handler fire off another
	183	* request when the time is right. */
	184	devc->state = LOG_DATA_IDLE;
	185	}
	186	}
	187	}
	188
	189	}
	190
	191	SR_PRIV int kecheng_kc_330b_configure(const struct sr_dev_inst *sdi)
	192	{
	193	struct dev_context *devc;
	194	struct sr_usb_dev_inst *usb;
	195	int len, ret;
	196	unsigned char buf[7];
	197
	198	sr_dbg("Configuring device.");
	199
	200	usb = sdi->conn;
	201	devc = sdi->priv;
	202
	203	buf[0] = CMD_CONFIGURE;
	204	buf[1] = devc->sample_interval;
	205	buf[2] = devc->alarm_low;
	206	buf[3] = devc->alarm_high;
	207	buf[4] = devc->mqflags & SR_MQFLAG_SPL_TIME_WEIGHT_F ? 0 : 1;
	208	buf[5] = devc->mqflags & SR_MQFLAG_SPL_FREQ_WEIGHT_A ? 0 : 1;
	209	buf[6] = devc->data_source;
	210	ret = libusb_bulk_transfer(usb->devhdl, EP_OUT, buf, 7, &len, 5);
	211	if (ret != 0 \|\| len != 7) {
	212	sr_dbg("Failed to configure device: %s", libusb_error_name(ret));
	213	return SR_ERR;
	214	}
	215
	216	/* The configure command ack takes about 32ms to come in. */
	217	ret = libusb_bulk_transfer(usb->devhdl, EP_IN, buf, 1, &len, 40);
	218	if (ret != 0 \|\| len != 1) {
	219	sr_dbg("Failed to configure device (no ack): %s", libusb_error_name(ret));
	220	return SR_ERR;
	221	}
	222	if (buf[0] != (CMD_CONFIGURE \| 0x80)) {
	223	sr_dbg("Failed to configure device: invalid response 0x%2.x", buf[0]);
	224	return SR_ERR;
	225	}
	226
	227	devc->config_dirty = FALSE;
	228
	229	return SR_OK;
	230	}
	231
	232	SR_PRIV int kecheng_kc_330b_set_date_time(struct sr_dev_inst *sdi)
	233	{
	234	struct sr_usb_dev_inst *usb;
	235	GDateTime *dt;
	236	int len, ret;
	237	unsigned char buf[7];
	238
	239	sr_dbg("Setting device date/time.");
	240
	241	usb = sdi->conn;
	242
	243	dt = g_date_time_new_now_local();
	244	buf[0] = CMD_SET_DATE_TIME;
	245	buf[1] = g_date_time_get_year(dt) - 2000;
	246	buf[2] = g_date_time_get_month(dt);
	247	buf[3] = g_date_time_get_day_of_month(dt);
	248	buf[4] = g_date_time_get_hour(dt);
	249	buf[5] = g_date_time_get_minute(dt);
	250	buf[6] = g_date_time_get_second(dt);
	251	g_date_time_unref(dt);
	252	ret = libusb_bulk_transfer(usb->devhdl, EP_OUT, buf, 7, &len, 5);
	253	if (ret != 0 \|\| len != 7) {
	254	sr_dbg("Failed to set date/time: %s", libusb_error_name(ret));
	255	return SR_ERR;
	256	}
	257
	258	ret = libusb_bulk_transfer(usb->devhdl, EP_IN, buf, 1, &len, 10);
	259	if (ret != 0 \|\| len != 1) {
	260	sr_dbg("Failed to set date/time (no ack): %s", libusb_error_name(ret));
	261	return SR_ERR;
	262	}
	263	if (buf[0] != (CMD_SET_DATE_TIME \| 0x80)) {
	264	sr_dbg("Failed to set date/time: invalid response 0x%2.x", buf[0]);
	265	return SR_ERR;
	266	}
	267
	268	return SR_OK;
	269	}
	270
	271	SR_PRIV int kecheng_kc_330b_status_get(const struct sr_dev_inst *sdi,
	272	int *status)
	273	{
	274	struct sr_usb_dev_inst *usb;
	275	int len, ret;
	276	unsigned char buf;
	277
	278	sr_dbg("Getting device status.");
	279
	280	usb = sdi->conn;
	281	buf = CMD_GET_STATUS;
	282	ret = libusb_bulk_transfer(usb->devhdl, EP_OUT, &buf, 1, &len, 5);
	283	if (ret != 0 \|\| len != 1) {
	284	sr_dbg("Failed to get status: %s", libusb_error_name(ret));
	285	return SR_ERR;
	286	}
	287
	288	ret = libusb_bulk_transfer(usb->devhdl, EP_IN, &buf, 1, &len, 10);
	289	if (ret != 0 \|\| len != 1) {
	290	sr_dbg("Failed to get status (no ack): %s", libusb_error_name(ret));
	291	return SR_ERR;
	292	}
	293	/* Need either 0x84 or 0xa4. */
	294	if (buf != (CMD_GET_STATUS \| 0x80) && buf != (CMD_GET_STATUS \| 0xa0)) {
	295	sr_dbg("Failed to get status: invalid response 0x%2.x", buf);
	296	return SR_ERR;
	297	}
	298
	299	if (buf & 0x20)
	300	*status = DEVICE_INACTIVE;
	301	else
	302	*status = DEVICE_ACTIVE;
	303
	304	return SR_OK;
	305	}
	306
	307	SR_PRIV int kecheng_kc_330b_log_info_get(const struct sr_dev_inst *sdi,
	308	unsigned char *buf)
	309	{
	310	struct sr_usb_dev_inst *usb;
	311	int len, ret;
	312
	313	sr_dbg("Getting logging info.");
	314
	315	usb = sdi->conn;
	316	buf[0] = CMD_GET_LOG_INFO;
	317	ret = libusb_bulk_transfer(usb->devhdl, EP_OUT, buf, 1, &len, 5);
	318	if (ret != 0 \|\| len != 1) {
	319	sr_dbg("Failed to get status: %s", libusb_error_name(ret));
	320	return SR_ERR;
	321	}
	322
	323	ret = libusb_bulk_transfer(usb->devhdl, EP_IN, buf, 9, &len, 10);
	324	if (ret != 0 \|\| len != 9) {
	325	sr_dbg("Failed to get status (no ack): %s", libusb_error_name(ret));
	326	return SR_ERR;
	327	}
	328	if (buf[0] != (CMD_GET_LOG_INFO \| 0x80) \|\| buf[1] > 6) {
	329	sr_dbg("Failed to get log info: invalid response 0x%2.x", buf[0]);
	330	return SR_ERR;
	331	}
	332
	333	return SR_OK;
	334	}