[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 <string.h>
#include "protocol.h"

extern struct sr_dev_driver kecheng_kc_330b_driver_info;
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_datafeed_packet packet;
	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->priv;

	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);
		packet.type = SR_DF_END;
		sr_session_send(cb_data, &packet);
		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));
				sdi->driver->dev_acquisition_stop((struct sr_dev_inst *)sdi,
						devc->cb_data);
				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));
			sdi->driver->dev_acquisition_stop((struct sr_dev_inst *)sdi,
					devc->cb_data);
			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;

	devc = sdi->priv;

	memset(&analog, 0, sizeof(struct sr_datafeed_analog));
	analog.mq = SR_MQ_SOUND_PRESSURE_LEVEL;
	analog.mqflags = devc->mqflags;
	analog.unit = SR_UNIT_DECIBEL_SPL;
	analog.channels = sdi->channels;
	analog.num_samples = buf_len;
	analog.data = buf;
	packet.type = SR_DF_ANALOG;
	packet.payload = &analog;
	sr_session_send(devc->cb_data, &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. */
		sdi->driver->dev_acquisition_stop((struct sr_dev_inst *)sdi,
				devc->cb_data);
		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) {
				sdi->driver->dev_acquisition_stop((struct sr_dev_inst *)sdi,
						devc->cb_data);
			} 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) {
				sdi->driver->dev_acquisition_stop((struct sr_dev_inst *)sdi,
						devc->cb_data);
			} 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
ed759a08 BV	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
df035528	20	#include <string.h>
ed759a08 BV	21	#include "protocol.h"
ed759a08 BV	22
df035528	23	extern struct sr_dev_driver kecheng_kc_330b_driver_info;
df035528 BV	24	extern const uint64_t kecheng_kc_330b_sample_intervals[][2];
df035528 BV	25
bc7be4a9	26	SR_PRIV int kecheng_kc_330b_handle_events(int fd, int revents, void *cb_data)
ed759a08	27	{
4f840ce9	28	struct sr_dev_driver *di;
df035528	29	struct drv_context *drvc;
bc7be4a9	30	struct dev_context *devc;
df035528 BV	31	struct sr_datafeed_packet packet;
	32	struct sr_dev_inst *sdi;
	33	struct sr_usb_dev_inst *usb;
bc7be4a9	34	struct timeval tv;
df035528 BV	35	const uint64_t *intv_entry;
df035528 BV	36	gint64 now, interval;
6c60facc	37	int offset, len, ret;
85ed4ab3	38	unsigned char buf[4];
bc7be4a9	39
ed759a08	40	(void)fd;
bc7be4a9	41	(void)revents;
ed759a08	42
bc7be4a9 BV	43	sdi = cb_data;
bc7be4a9 BV	44	devc = sdi->priv;
df035528	45	usb = sdi->conn;
4f840ce9 ML	46	di = sdi->driver;
4f840ce9 ML	47	drvc = di->priv;
bc7be4a9	48
df035528 BV	49	memset(&tv, 0, sizeof(struct timeval));
	50	libusb_handle_events_timeout_completed(drvc->sr_ctx->libusb_ctx, &tv,
	51	NULL);
	52
	53	if (sdi->status == SR_ST_STOPPING) {
	54	libusb_free_transfer(devc->xfer);
102f1239	55	usb_source_remove(sdi->session, drvc->sr_ctx);
df035528 BV	56	packet.type = SR_DF_END;
	57	sr_session_send(cb_data, &packet);
	58	sdi->status = SR_ST_ACTIVE;
	59	return TRUE;
	60	}
	61
	62	if (devc->state == LIVE_SPL_IDLE) {
85ed4ab3	63	/* Request samples at the interval rate. */
df035528 BV	64	now = g_get_monotonic_time() / 1000;
	65	intv_entry = kecheng_kc_330b_sample_intervals[devc->sample_interval];
	66	interval = intv_entry[0] * 1000 / intv_entry[1];
	67	if (now - devc->last_live_request > interval) {
85ed4ab3 BV	68	buf[0] = CMD_GET_LIVE_SPL;
85ed4ab3 BV	69	ret = libusb_bulk_transfer(usb->devhdl, EP_OUT, buf, 1, &len, 5);
df035528 BV	70	if (ret != 0 \|\| len != 1) {
	71	sr_dbg("Failed to request new acquisition: %s",
	72	libusb_error_name(ret));
	73	sdi->driver->dev_acquisition_stop((struct sr_dev_inst *)sdi,
	74	devc->cb_data);
	75	return TRUE;
	76	}
	77	libusb_submit_transfer(devc->xfer);
	78	devc->last_live_request = now;
	79	devc->state = LIVE_SPL_WAIT;
	80	}
85ed4ab3 BV	81	} else if (devc->state == LIVE_SPL_IDLE) {
	82	buf[0] = CMD_GET_LOG_DATA;
	83	offset = devc->num_samples / 63;
	84	buf[1] = (offset >> 8) & 0xff;
	85	buf[2] = offset & 0xff;
	86	if (devc->stored_samples - devc->num_samples > 63)
	87	buf[3] = 63;
	88	else
	89	/* Last chunk. */
	90	buf[3] = devc->stored_samples - devc->num_samples;
	91	ret = libusb_bulk_transfer(usb->devhdl, EP_OUT, buf, 4, &len, 5);
	92	if (ret != 0 \|\| len != 4) {
	93	sr_dbg("Failed to request next chunk: %s",
	94	libusb_error_name(ret));
	95	sdi->driver->dev_acquisition_stop((struct sr_dev_inst *)sdi,
	96	devc->cb_data);
	97	return TRUE;
	98	}
	99	libusb_submit_transfer(devc->xfer);
	100	devc->state = LIVE_SPL_WAIT;
df035528	101	}
bc7be4a9 BV	102
	103	return TRUE;
	104	}
	105
df035528 BV	106	static void send_data(const struct sr_dev_inst sdi, void buf, unsigned int buf_len)
	107	{
	108	struct dev_context *devc;
	109	struct sr_datafeed_packet packet;
	110	struct sr_datafeed_analog analog;
	111
	112	devc = sdi->priv;
	113
	114	memset(&analog, 0, sizeof(struct sr_datafeed_analog));
	115	analog.mq = SR_MQ_SOUND_PRESSURE_LEVEL;
	116	analog.mqflags = devc->mqflags;
	117	analog.unit = SR_UNIT_DECIBEL_SPL;
ba7dd8bb	118	analog.channels = sdi->channels;
df035528 BV	119	analog.num_samples = buf_len;
	120	analog.data = buf;
	121	packet.type = SR_DF_ANALOG;
	122	packet.payload = &analog;
	123	sr_session_send(devc->cb_data, &packet);
	124
	125	}
	126
55462b8b	127	SR_PRIV void LIBUSB_CALL kecheng_kc_330b_receive_transfer(struct libusb_transfer *transfer)
df035528 BV	128	{
	129	struct dev_context *devc;
	130	struct sr_dev_inst *sdi;
85ed4ab3 BV	131	float fvalue[64];
85ed4ab3 BV	132	int packet_has_error, num_samples, i;
df035528 BV	133
	134	sdi = transfer->user_data;
	135	devc = sdi->priv;
	136
	137	packet_has_error = FALSE;
	138	switch (transfer->status) {
	139	case LIBUSB_TRANSFER_NO_DEVICE:
	140	/* USB device was unplugged. */
	141	sdi->driver->dev_acquisition_stop((struct sr_dev_inst *)sdi,
	142	devc->cb_data);
	143	return;
	144	case LIBUSB_TRANSFER_COMPLETED:
	145	case LIBUSB_TRANSFER_TIMED_OUT: /* We may have received some data though */
	146	break;
	147	default:
	148	packet_has_error = TRUE;
	149	break;
	150	}
	151
85ed4ab3 BV	152	if (packet_has_error)
85ed4ab3 BV	153	return;
df035528	154
85ed4ab3 BV	155	if (devc->state == LIVE_SPL_WAIT) {
	156	if (transfer->actual_length != 3 \|\| transfer->buffer[0] != 0x88) {
	157	sr_dbg("Received invalid SPL packet.");
	158	} else {
	159	fvalue[0] = ((transfer->buffer[1] << 8) + transfer->buffer[2]) / 10.0;
	160	send_data(sdi, fvalue, 1);
	161	devc->num_samples++;
	162	if (devc->limit_samples && devc->num_samples >= devc->limit_samples) {
	163	sdi->driver->dev_acquisition_stop((struct sr_dev_inst *)sdi,
	164	devc->cb_data);
	165	} else {
df035528 BV	166	/* let USB event handler fire off another
	167	* request when the time is right. */
	168	devc->state = LIVE_SPL_IDLE;
	169	}
	170	}
85ed4ab3 BV	171	} else if (devc->state == LOG_DATA_WAIT) {
	172	if (transfer->actual_length < 1 \|\| !(transfer->actual_length & 0x01)) {
	173	sr_dbg("Received invalid stored SPL packet.");
	174	} else {
	175	num_samples = (transfer->actual_length - 1) / 2;
	176	for (i = 0; i < num_samples; i++) {
	177	fvalue[i] = transfer->buffer[1 + i * 2] << 8;
	178	fvalue[i] += transfer->buffer[1 + i * 2 + 1];
	179	fvalue[i] /= 10.0;
	180	}
	181	send_data(sdi, fvalue, 1);
	182	devc->num_samples += num_samples;
	183	if (devc->num_samples >= devc->stored_samples) {
	184	sdi->driver->dev_acquisition_stop((struct sr_dev_inst *)sdi,
	185	devc->cb_data);
	186	} else {
	187	/* let USB event handler fire off another
	188	* request when the time is right. */
	189	devc->state = LOG_DATA_IDLE;
	190	}
	191	}
df035528 BV	192	}
df035528 BV	193
df035528 BV	194	}
df035528 BV	195
bc7be4a9 BV	196	SR_PRIV int kecheng_kc_330b_configure(const struct sr_dev_inst *sdi)
bc7be4a9 BV	197	{
ed759a08	198	struct dev_context *devc;
bc7be4a9 BV	199	struct sr_usb_dev_inst *usb;
	200	int len, ret;
	201	unsigned char buf[7];
ed759a08	202
bc7be4a9	203	sr_dbg("Configuring device.");
ed759a08	204
bc7be4a9 BV	205	usb = sdi->conn;
bc7be4a9 BV	206	devc = sdi->priv;
ed759a08	207
bc7be4a9 BV	208	buf[0] = CMD_CONFIGURE;
	209	buf[1] = devc->sample_interval;
	210	buf[2] = devc->alarm_low;
	211	buf[3] = devc->alarm_high;
	212	buf[4] = devc->mqflags & SR_MQFLAG_SPL_TIME_WEIGHT_F ? 0 : 1;
	213	buf[5] = devc->mqflags & SR_MQFLAG_SPL_FREQ_WEIGHT_A ? 0 : 1;
	214	buf[6] = devc->data_source;
	215	ret = libusb_bulk_transfer(usb->devhdl, EP_OUT, buf, 7, &len, 5);
	216	if (ret != 0 \|\| len != 7) {
	217	sr_dbg("Failed to configure device: %s", libusb_error_name(ret));
	218	return SR_ERR;
ed759a08 BV	219	}
ed759a08 BV	220
bc7be4a9 BV	221	/* The configure command ack takes about 32ms to come in. */
	222	ret = libusb_bulk_transfer(usb->devhdl, EP_IN, buf, 1, &len, 40);
	223	if (ret != 0 \|\| len != 1) {
	224	sr_dbg("Failed to configure device (no ack): %s", libusb_error_name(ret));
	225	return SR_ERR;
	226	}
	227	if (buf[0] != (CMD_CONFIGURE \| 0x80)) {
	228	sr_dbg("Failed to configure device: invalid response 0x%2.x", buf[0]);
	229	return SR_ERR;
	230	}
	231
85ed4ab3 BV	232	devc->config_dirty = FALSE;
85ed4ab3 BV	233
bc7be4a9 BV	234	return SR_OK;
	235	}
	236
	237	SR_PRIV int kecheng_kc_330b_set_date_time(struct sr_dev_inst *sdi)
	238	{
	239	struct sr_usb_dev_inst *usb;
	240	GDateTime *dt;
	241	int len, ret;
	242	unsigned char buf[7];
	243
	244	sr_dbg("Setting device date/time.");
	245
	246	usb = sdi->conn;
	247
	248	dt = g_date_time_new_now_local();
	249	buf[0] = CMD_SET_DATE_TIME;
	250	buf[1] = g_date_time_get_year(dt) - 2000;
	251	buf[2] = g_date_time_get_month(dt);
	252	buf[3] = g_date_time_get_day_of_month(dt);
	253	buf[4] = g_date_time_get_hour(dt);
	254	buf[5] = g_date_time_get_minute(dt);
	255	buf[6] = g_date_time_get_second(dt);
	256	g_date_time_unref(dt);
	257	ret = libusb_bulk_transfer(usb->devhdl, EP_OUT, buf, 7, &len, 5);
	258	if (ret != 0 \|\| len != 7) {
	259	sr_dbg("Failed to set date/time: %s", libusb_error_name(ret));
	260	return SR_ERR;
	261	}
	262
	263	ret = libusb_bulk_transfer(usb->devhdl, EP_IN, buf, 1, &len, 10);
	264	if (ret != 0 \|\| len != 1) {
	265	sr_dbg("Failed to set date/time (no ack): %s", libusb_error_name(ret));
	266	return SR_ERR;
	267	}
	268	if (buf[0] != (CMD_SET_DATE_TIME \| 0x80)) {
	269	sr_dbg("Failed to set date/time: invalid response 0x%2.x", buf[0]);
	270	return SR_ERR;
	271	}
	272
f336618c BV	273	return SR_OK;
	274	}
	275
	276	SR_PRIV int kecheng_kc_330b_status_get(const struct sr_dev_inst *sdi,
	277	int *status)
	278	{
	279	struct sr_usb_dev_inst *usb;
	280	int len, ret;
	281	unsigned char buf;
	282
	283	sr_dbg("Getting device status.");
	284
	285	usb = sdi->conn;
	286	buf = CMD_GET_STATUS;
	287	ret = libusb_bulk_transfer(usb->devhdl, EP_OUT, &buf, 1, &len, 5);
	288	if (ret != 0 \|\| len != 1) {
	289	sr_dbg("Failed to get status: %s", libusb_error_name(ret));
	290	return SR_ERR;
	291	}
	292
	293	ret = libusb_bulk_transfer(usb->devhdl, EP_IN, &buf, 1, &len, 10);
	294	if (ret != 0 \|\| len != 1) {
	295	sr_dbg("Failed to get status (no ack): %s", libusb_error_name(ret));
	296	return SR_ERR;
	297	}
	298	/* Need either 0x84 or 0xa4. */
	299	if (buf != (CMD_GET_STATUS \| 0x80) && buf != (CMD_GET_STATUS \| 0xa0)) {
	300	sr_dbg("Failed to get status: invalid response 0x%2.x", buf);
	301	return SR_ERR;
	302	}
bc7be4a9	303
f336618c BV	304	if (buf & 0x20)
	305	*status = DEVICE_INACTIVE;
	306	else
	307	*status = DEVICE_ACTIVE;
bc7be4a9 BV	308
	309	return SR_OK;
	310	}
	311
85ed4ab3 BV	312	SR_PRIV int kecheng_kc_330b_log_info_get(const struct sr_dev_inst *sdi,
	313	unsigned char *buf)
	314	{
	315	struct sr_usb_dev_inst *usb;
	316	int len, ret;
	317
	318	sr_dbg("Getting logging info.");
	319
	320	usb = sdi->conn;
	321	buf[0] = CMD_GET_LOG_INFO;
	322	ret = libusb_bulk_transfer(usb->devhdl, EP_OUT, buf, 1, &len, 5);
	323	if (ret != 0 \|\| len != 1) {
	324	sr_dbg("Failed to get status: %s", libusb_error_name(ret));
	325	return SR_ERR;
	326	}
	327
	328	ret = libusb_bulk_transfer(usb->devhdl, EP_IN, buf, 9, &len, 10);
	329	if (ret != 0 \|\| len != 9) {
	330	sr_dbg("Failed to get status (no ack): %s", libusb_error_name(ret));
	331	return SR_ERR;
	332	}
	333	if (buf[0] != (CMD_GET_LOG_INFO \| 0x80) \|\| buf[1] > 6) {
	334	sr_dbg("Failed to get log info: invalid response 0x%2.x", buf[0]);
	335	return SR_ERR;
	336	}
	337
	338	return SR_OK;
	339	}