[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 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->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);
		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_old analog;

	devc = sdi->priv;

	memset(&analog, 0, sizeof(struct sr_datafeed_analog_old));
	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_OLD;
	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
6ec6c43b	20	#include <config.h>
df035528	21	#include <string.h>
ed759a08 BV	22	#include "protocol.h"
ed759a08 BV	23
df035528	24	extern struct sr_dev_driver kecheng_kc_330b_driver_info;
df035528 BV	25	extern const uint64_t kecheng_kc_330b_sample_intervals[][2];
df035528 BV	26
bc7be4a9	27	SR_PRIV int kecheng_kc_330b_handle_events(int fd, int revents, void *cb_data)
ed759a08	28	{
4f840ce9	29	struct sr_dev_driver *di;
df035528	30	struct drv_context *drvc;
bc7be4a9	31	struct dev_context *devc;
df035528 BV	32	struct sr_datafeed_packet packet;
	33	struct sr_dev_inst *sdi;
	34	struct sr_usb_dev_inst *usb;
bc7be4a9	35	struct timeval tv;
df035528 BV	36	const uint64_t *intv_entry;
df035528 BV	37	gint64 now, interval;
6c60facc	38	int offset, len, ret;
85ed4ab3	39	unsigned char buf[4];
bc7be4a9	40
ed759a08	41	(void)fd;
bc7be4a9	42	(void)revents;
ed759a08	43
bc7be4a9 BV	44	sdi = cb_data;
bc7be4a9 BV	45	devc = sdi->priv;
df035528	46	usb = sdi->conn;
4f840ce9	47	di = sdi->driver;
41812aca	48	drvc = di->context;
bc7be4a9	49
df035528 BV	50	memset(&tv, 0, sizeof(struct timeval));
	51	libusb_handle_events_timeout_completed(drvc->sr_ctx->libusb_ctx, &tv,
	52	NULL);
	53
	54	if (sdi->status == SR_ST_STOPPING) {
	55	libusb_free_transfer(devc->xfer);
102f1239	56	usb_source_remove(sdi->session, drvc->sr_ctx);
df035528 BV	57	packet.type = SR_DF_END;
	58	sr_session_send(cb_data, &packet);
	59	sdi->status = SR_ST_ACTIVE;
	60	return TRUE;
	61	}
	62
	63	if (devc->state == LIVE_SPL_IDLE) {
85ed4ab3	64	/* Request samples at the interval rate. */
df035528 BV	65	now = g_get_monotonic_time() / 1000;
	66	intv_entry = kecheng_kc_330b_sample_intervals[devc->sample_interval];
	67	interval = intv_entry[0] * 1000 / intv_entry[1];
	68	if (now - devc->last_live_request > interval) {
85ed4ab3 BV	69	buf[0] = CMD_GET_LIVE_SPL;
85ed4ab3 BV	70	ret = libusb_bulk_transfer(usb->devhdl, EP_OUT, buf, 1, &len, 5);
df035528 BV	71	if (ret != 0 \|\| len != 1) {
	72	sr_dbg("Failed to request new acquisition: %s",
	73	libusb_error_name(ret));
	74	sdi->driver->dev_acquisition_stop((struct sr_dev_inst *)sdi,
	75	devc->cb_data);
	76	return TRUE;
	77	}
	78	libusb_submit_transfer(devc->xfer);
	79	devc->last_live_request = now;
	80	devc->state = LIVE_SPL_WAIT;
	81	}
85ed4ab3 BV	82	} else if (devc->state == LIVE_SPL_IDLE) {
	83	buf[0] = CMD_GET_LOG_DATA;
	84	offset = devc->num_samples / 63;
	85	buf[1] = (offset >> 8) & 0xff;
	86	buf[2] = offset & 0xff;
	87	if (devc->stored_samples - devc->num_samples > 63)
	88	buf[3] = 63;
	89	else
	90	/* Last chunk. */
	91	buf[3] = devc->stored_samples - devc->num_samples;
	92	ret = libusb_bulk_transfer(usb->devhdl, EP_OUT, buf, 4, &len, 5);
	93	if (ret != 0 \|\| len != 4) {
	94	sr_dbg("Failed to request next chunk: %s",
	95	libusb_error_name(ret));
	96	sdi->driver->dev_acquisition_stop((struct sr_dev_inst *)sdi,
	97	devc->cb_data);
	98	return TRUE;
	99	}
	100	libusb_submit_transfer(devc->xfer);
	101	devc->state = LIVE_SPL_WAIT;
df035528	102	}
bc7be4a9 BV	103
	104	return TRUE;
	105	}
	106
df035528 BV	107	static void send_data(const struct sr_dev_inst sdi, void buf, unsigned int buf_len)
	108	{
	109	struct dev_context *devc;
	110	struct sr_datafeed_packet packet;
5faebab2	111	struct sr_datafeed_analog_old analog;
df035528 BV	112
	113	devc = sdi->priv;
	114
5faebab2	115	memset(&analog, 0, sizeof(struct sr_datafeed_analog_old));
df035528 BV	116	analog.mq = SR_MQ_SOUND_PRESSURE_LEVEL;
	117	analog.mqflags = devc->mqflags;
	118	analog.unit = SR_UNIT_DECIBEL_SPL;
ba7dd8bb	119	analog.channels = sdi->channels;
df035528 BV	120	analog.num_samples = buf_len;
df035528 BV	121	analog.data = buf;
5faebab2	122	packet.type = SR_DF_ANALOG_OLD;
df035528 BV	123	packet.payload = &analog;
	124	sr_session_send(devc->cb_data, &packet);
	125
	126	}
	127
55462b8b	128	SR_PRIV void LIBUSB_CALL kecheng_kc_330b_receive_transfer(struct libusb_transfer *transfer)
df035528 BV	129	{
	130	struct dev_context *devc;
	131	struct sr_dev_inst *sdi;
85ed4ab3 BV	132	float fvalue[64];
85ed4ab3 BV	133	int packet_has_error, num_samples, i;
df035528 BV	134
	135	sdi = transfer->user_data;
	136	devc = sdi->priv;
	137
	138	packet_has_error = FALSE;
	139	switch (transfer->status) {
	140	case LIBUSB_TRANSFER_NO_DEVICE:
	141	/* USB device was unplugged. */
	142	sdi->driver->dev_acquisition_stop((struct sr_dev_inst *)sdi,
	143	devc->cb_data);
	144	return;
	145	case LIBUSB_TRANSFER_COMPLETED:
	146	case LIBUSB_TRANSFER_TIMED_OUT: /* We may have received some data though */
	147	break;
	148	default:
	149	packet_has_error = TRUE;
	150	break;
	151	}
	152
85ed4ab3 BV	153	if (packet_has_error)
85ed4ab3 BV	154	return;
df035528	155
85ed4ab3 BV	156	if (devc->state == LIVE_SPL_WAIT) {
	157	if (transfer->actual_length != 3 \|\| transfer->buffer[0] != 0x88) {
	158	sr_dbg("Received invalid SPL packet.");
	159	} else {
	160	fvalue[0] = ((transfer->buffer[1] << 8) + transfer->buffer[2]) / 10.0;
	161	send_data(sdi, fvalue, 1);
	162	devc->num_samples++;
	163	if (devc->limit_samples && devc->num_samples >= devc->limit_samples) {
	164	sdi->driver->dev_acquisition_stop((struct sr_dev_inst *)sdi,
	165	devc->cb_data);
	166	} else {
df035528 BV	167	/* let USB event handler fire off another
	168	* request when the time is right. */
	169	devc->state = LIVE_SPL_IDLE;
	170	}
	171	}
85ed4ab3 BV	172	} else if (devc->state == LOG_DATA_WAIT) {
	173	if (transfer->actual_length < 1 \|\| !(transfer->actual_length & 0x01)) {
	174	sr_dbg("Received invalid stored SPL packet.");
	175	} else {
	176	num_samples = (transfer->actual_length - 1) / 2;
	177	for (i = 0; i < num_samples; i++) {
	178	fvalue[i] = transfer->buffer[1 + i * 2] << 8;
	179	fvalue[i] += transfer->buffer[1 + i * 2 + 1];
	180	fvalue[i] /= 10.0;
	181	}
	182	send_data(sdi, fvalue, 1);
	183	devc->num_samples += num_samples;
	184	if (devc->num_samples >= devc->stored_samples) {
	185	sdi->driver->dev_acquisition_stop((struct sr_dev_inst *)sdi,
	186	devc->cb_data);
	187	} else {
	188	/* let USB event handler fire off another
	189	* request when the time is right. */
	190	devc->state = LOG_DATA_IDLE;
	191	}
	192	}
df035528 BV	193	}
df035528 BV	194
df035528 BV	195	}
df035528 BV	196
bc7be4a9 BV	197	SR_PRIV int kecheng_kc_330b_configure(const struct sr_dev_inst *sdi)
bc7be4a9 BV	198	{
ed759a08	199	struct dev_context *devc;
bc7be4a9 BV	200	struct sr_usb_dev_inst *usb;
	201	int len, ret;
	202	unsigned char buf[7];
ed759a08	203
bc7be4a9	204	sr_dbg("Configuring device.");
ed759a08	205
bc7be4a9 BV	206	usb = sdi->conn;
bc7be4a9 BV	207	devc = sdi->priv;
ed759a08	208
bc7be4a9 BV	209	buf[0] = CMD_CONFIGURE;
	210	buf[1] = devc->sample_interval;
	211	buf[2] = devc->alarm_low;
	212	buf[3] = devc->alarm_high;
	213	buf[4] = devc->mqflags & SR_MQFLAG_SPL_TIME_WEIGHT_F ? 0 : 1;
	214	buf[5] = devc->mqflags & SR_MQFLAG_SPL_FREQ_WEIGHT_A ? 0 : 1;
	215	buf[6] = devc->data_source;
	216	ret = libusb_bulk_transfer(usb->devhdl, EP_OUT, buf, 7, &len, 5);
	217	if (ret != 0 \|\| len != 7) {
	218	sr_dbg("Failed to configure device: %s", libusb_error_name(ret));
	219	return SR_ERR;
ed759a08 BV	220	}
ed759a08 BV	221
bc7be4a9 BV	222	/* The configure command ack takes about 32ms to come in. */
	223	ret = libusb_bulk_transfer(usb->devhdl, EP_IN, buf, 1, &len, 40);
	224	if (ret != 0 \|\| len != 1) {
	225	sr_dbg("Failed to configure device (no ack): %s", libusb_error_name(ret));
	226	return SR_ERR;
	227	}
	228	if (buf[0] != (CMD_CONFIGURE \| 0x80)) {
	229	sr_dbg("Failed to configure device: invalid response 0x%2.x", buf[0]);
	230	return SR_ERR;
	231	}
	232
85ed4ab3 BV	233	devc->config_dirty = FALSE;
85ed4ab3 BV	234
bc7be4a9 BV	235	return SR_OK;
	236	}
	237
	238	SR_PRIV int kecheng_kc_330b_set_date_time(struct sr_dev_inst *sdi)
	239	{
	240	struct sr_usb_dev_inst *usb;
	241	GDateTime *dt;
	242	int len, ret;
	243	unsigned char buf[7];
	244
	245	sr_dbg("Setting device date/time.");
	246
	247	usb = sdi->conn;
	248
	249	dt = g_date_time_new_now_local();
	250	buf[0] = CMD_SET_DATE_TIME;
	251	buf[1] = g_date_time_get_year(dt) - 2000;
	252	buf[2] = g_date_time_get_month(dt);
	253	buf[3] = g_date_time_get_day_of_month(dt);
	254	buf[4] = g_date_time_get_hour(dt);
	255	buf[5] = g_date_time_get_minute(dt);
	256	buf[6] = g_date_time_get_second(dt);
	257	g_date_time_unref(dt);
	258	ret = libusb_bulk_transfer(usb->devhdl, EP_OUT, buf, 7, &len, 5);
	259	if (ret != 0 \|\| len != 7) {
	260	sr_dbg("Failed to set date/time: %s", libusb_error_name(ret));
	261	return SR_ERR;
	262	}
	263
	264	ret = libusb_bulk_transfer(usb->devhdl, EP_IN, buf, 1, &len, 10);
	265	if (ret != 0 \|\| len != 1) {
	266	sr_dbg("Failed to set date/time (no ack): %s", libusb_error_name(ret));
	267	return SR_ERR;
	268	}
	269	if (buf[0] != (CMD_SET_DATE_TIME \| 0x80)) {
	270	sr_dbg("Failed to set date/time: invalid response 0x%2.x", buf[0]);
	271	return SR_ERR;
	272	}
	273
f336618c BV	274	return SR_OK;
	275	}
	276
	277	SR_PRIV int kecheng_kc_330b_status_get(const struct sr_dev_inst *sdi,
	278	int *status)
	279	{
	280	struct sr_usb_dev_inst *usb;
	281	int len, ret;
	282	unsigned char buf;
	283
	284	sr_dbg("Getting device status.");
	285
	286	usb = sdi->conn;
	287	buf = CMD_GET_STATUS;
	288	ret = libusb_bulk_transfer(usb->devhdl, EP_OUT, &buf, 1, &len, 5);
	289	if (ret != 0 \|\| len != 1) {
	290	sr_dbg("Failed to get status: %s", libusb_error_name(ret));
	291	return SR_ERR;
	292	}
	293
	294	ret = libusb_bulk_transfer(usb->devhdl, EP_IN, &buf, 1, &len, 10);
	295	if (ret != 0 \|\| len != 1) {
	296	sr_dbg("Failed to get status (no ack): %s", libusb_error_name(ret));
	297	return SR_ERR;
	298	}
	299	/* Need either 0x84 or 0xa4. */
	300	if (buf != (CMD_GET_STATUS \| 0x80) && buf != (CMD_GET_STATUS \| 0xa0)) {
	301	sr_dbg("Failed to get status: invalid response 0x%2.x", buf);
	302	return SR_ERR;
	303	}
bc7be4a9	304
f336618c BV	305	if (buf & 0x20)
	306	*status = DEVICE_INACTIVE;
	307	else
	308	*status = DEVICE_ACTIVE;
bc7be4a9 BV	309
	310	return SR_OK;
	311	}
	312
85ed4ab3 BV	313	SR_PRIV int kecheng_kc_330b_log_info_get(const struct sr_dev_inst *sdi,
	314	unsigned char *buf)
	315	{
	316	struct sr_usb_dev_inst *usb;
	317	int len, ret;
	318
	319	sr_dbg("Getting logging info.");
	320
	321	usb = sdi->conn;
	322	buf[0] = CMD_GET_LOG_INFO;
	323	ret = libusb_bulk_transfer(usb->devhdl, EP_OUT, buf, 1, &len, 5);
	324	if (ret != 0 \|\| len != 1) {
	325	sr_dbg("Failed to get status: %s", libusb_error_name(ret));
	326	return SR_ERR;
	327	}
	328
	329	ret = libusb_bulk_transfer(usb->devhdl, EP_IN, buf, 9, &len, 10);
	330	if (ret != 0 \|\| len != 9) {
	331	sr_dbg("Failed to get status (no ack): %s", libusb_error_name(ret));
	332	return SR_ERR;
	333	}
	334	if (buf[0] != (CMD_GET_LOG_INFO \| 0x80) \|\| buf[1] > 6) {
	335	sr_dbg("Failed to get log info: invalid response 0x%2.x", buf[0]);
	336	return SR_ERR;
	337	}
	338
	339	return SR_OK;
	340	}