[libsigrok.git] / 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;
static struct sr_dev_driver *di = &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 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;

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

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