[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));
				sdi->driver->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));
			sdi->driver->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, 0);
	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. */
		sdi->driver->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) {
				sdi->driver->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) {
				sdi->driver->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
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	22	#include "protocol.h"
df035528 BV	23	extern const uint64_t kecheng_kc_330b_sample_intervals[][2];
df035528 BV	24
bc7be4a9	25	SR_PRIV int kecheng_kc_330b_handle_events(int fd, int revents, void *cb_data)
ed759a08	26	{
4f840ce9	27	struct sr_dev_driver *di;
df035528	28	struct drv_context *drvc;
bc7be4a9	29	struct dev_context *devc;
df035528 BV	30	struct sr_dev_inst *sdi;
df035528 BV	31	struct sr_usb_dev_inst *usb;
bc7be4a9	32	struct timeval tv;
df035528 BV	33	const uint64_t *intv_entry;
df035528 BV	34	gint64 now, interval;
6c60facc	35	int offset, len, ret;
85ed4ab3	36	unsigned char buf[4];
bc7be4a9	37
ed759a08	38	(void)fd;
bc7be4a9	39	(void)revents;
ed759a08	40
bc7be4a9 BV	41	sdi = cb_data;
bc7be4a9 BV	42	devc = sdi->priv;
df035528	43	usb = sdi->conn;
4f840ce9	44	di = sdi->driver;
41812aca	45	drvc = di->context;
bc7be4a9	46
df035528 BV	47	memset(&tv, 0, sizeof(struct timeval));
	48	libusb_handle_events_timeout_completed(drvc->sr_ctx->libusb_ctx, &tv,
	49	NULL);
	50
	51	if (sdi->status == SR_ST_STOPPING) {
	52	libusb_free_transfer(devc->xfer);
102f1239	53	usb_source_remove(sdi->session, drvc->sr_ctx);
bee2b016	54	std_session_send_df_end(sdi);
df035528 BV	55	sdi->status = SR_ST_ACTIVE;
	56	return TRUE;
	57	}
	58
	59	if (devc->state == LIVE_SPL_IDLE) {
85ed4ab3	60	/* Request samples at the interval rate. */
df035528 BV	61	now = g_get_monotonic_time() / 1000;
	62	intv_entry = kecheng_kc_330b_sample_intervals[devc->sample_interval];
	63	interval = intv_entry[0] * 1000 / intv_entry[1];
	64	if (now - devc->last_live_request > interval) {
85ed4ab3 BV	65	buf[0] = CMD_GET_LIVE_SPL;
85ed4ab3 BV	66	ret = libusb_bulk_transfer(usb->devhdl, EP_OUT, buf, 1, &len, 5);
df035528 BV	67	if (ret != 0 \|\| len != 1) {
	68	sr_dbg("Failed to request new acquisition: %s",
	69	libusb_error_name(ret));
695dc859	70	sdi->driver->dev_acquisition_stop(sdi);
df035528 BV	71	return TRUE;
	72	}
	73	libusb_submit_transfer(devc->xfer);
	74	devc->last_live_request = now;
	75	devc->state = LIVE_SPL_WAIT;
	76	}
85ed4ab3 BV	77	} else if (devc->state == LIVE_SPL_IDLE) {
	78	buf[0] = CMD_GET_LOG_DATA;
	79	offset = devc->num_samples / 63;
	80	buf[1] = (offset >> 8) & 0xff;
	81	buf[2] = offset & 0xff;
	82	if (devc->stored_samples - devc->num_samples > 63)
	83	buf[3] = 63;
	84	else
	85	/* Last chunk. */
	86	buf[3] = devc->stored_samples - devc->num_samples;
	87	ret = libusb_bulk_transfer(usb->devhdl, EP_OUT, buf, 4, &len, 5);
	88	if (ret != 0 \|\| len != 4) {
	89	sr_dbg("Failed to request next chunk: %s",
	90	libusb_error_name(ret));
695dc859	91	sdi->driver->dev_acquisition_stop(sdi);
85ed4ab3 BV	92	return TRUE;
	93	}
	94	libusb_submit_transfer(devc->xfer);
	95	devc->state = LIVE_SPL_WAIT;
df035528	96	}
bc7be4a9 BV	97
	98	return TRUE;
	99	}
	100
df035528 BV	101	static void send_data(const struct sr_dev_inst sdi, void buf, unsigned int buf_len)
	102	{
	103	struct dev_context *devc;
	104	struct sr_datafeed_packet packet;
2c911182 UH	105	struct sr_datafeed_analog analog;
	106	struct sr_analog_encoding encoding;
	107	struct sr_analog_meaning meaning;
	108	struct sr_analog_spec spec;
df035528 BV	109
	110	devc = sdi->priv;
	111
2c911182 UH	112	sr_analog_init(&analog, &encoding, &meaning, &spec, 0);
	113	analog.meaning->mq = SR_MQ_SOUND_PRESSURE_LEVEL;
	114	analog.meaning->mqflags = devc->mqflags;
	115	analog.meaning->unit = SR_UNIT_DECIBEL_SPL;
	116	analog.meaning->channels = sdi->channels;
df035528 BV	117	analog.num_samples = buf_len;
df035528 BV	118	analog.data = buf;
2c911182	119	packet.type = SR_DF_ANALOG;
df035528	120	packet.payload = &analog;
695dc859	121	sr_session_send(sdi, &packet);
df035528 BV	122	}
df035528 BV	123
55462b8b	124	SR_PRIV void LIBUSB_CALL kecheng_kc_330b_receive_transfer(struct libusb_transfer *transfer)
df035528 BV	125	{
	126	struct dev_context *devc;
	127	struct sr_dev_inst *sdi;
85ed4ab3 BV	128	float fvalue[64];
85ed4ab3 BV	129	int packet_has_error, num_samples, i;
df035528 BV	130
	131	sdi = transfer->user_data;
	132	devc = sdi->priv;
	133
	134	packet_has_error = FALSE;
	135	switch (transfer->status) {
	136	case LIBUSB_TRANSFER_NO_DEVICE:
	137	/* USB device was unplugged. */
695dc859	138	sdi->driver->dev_acquisition_stop(sdi);
df035528 BV	139	return;
	140	case LIBUSB_TRANSFER_COMPLETED:
	141	case LIBUSB_TRANSFER_TIMED_OUT: /* We may have received some data though */
	142	break;
	143	default:
	144	packet_has_error = TRUE;
	145	break;
	146	}
	147
85ed4ab3 BV	148	if (packet_has_error)
85ed4ab3 BV	149	return;
df035528	150
85ed4ab3 BV	151	if (devc->state == LIVE_SPL_WAIT) {
	152	if (transfer->actual_length != 3 \|\| transfer->buffer[0] != 0x88) {
	153	sr_dbg("Received invalid SPL packet.");
	154	} else {
	155	fvalue[0] = ((transfer->buffer[1] << 8) + transfer->buffer[2]) / 10.0;
	156	send_data(sdi, fvalue, 1);
	157	devc->num_samples++;
	158	if (devc->limit_samples && devc->num_samples >= devc->limit_samples) {
695dc859	159	sdi->driver->dev_acquisition_stop(sdi);
85ed4ab3	160	} else {
df035528 BV	161	/* let USB event handler fire off another
	162	* request when the time is right. */
	163	devc->state = LIVE_SPL_IDLE;
	164	}
	165	}
85ed4ab3 BV	166	} else if (devc->state == LOG_DATA_WAIT) {
	167	if (transfer->actual_length < 1 \|\| !(transfer->actual_length & 0x01)) {
	168	sr_dbg("Received invalid stored SPL packet.");
	169	} else {
	170	num_samples = (transfer->actual_length - 1) / 2;
	171	for (i = 0; i < num_samples; i++) {
	172	fvalue[i] = transfer->buffer[1 + i * 2] << 8;
	173	fvalue[i] += transfer->buffer[1 + i * 2 + 1];
	174	fvalue[i] /= 10.0;
	175	}
	176	send_data(sdi, fvalue, 1);
	177	devc->num_samples += num_samples;
	178	if (devc->num_samples >= devc->stored_samples) {
695dc859	179	sdi->driver->dev_acquisition_stop(sdi);
85ed4ab3 BV	180	} else {
	181	/* let USB event handler fire off another
	182	* request when the time is right. */
	183	devc->state = LOG_DATA_IDLE;
	184	}
	185	}
df035528 BV	186	}
df035528 BV	187
df035528 BV	188	}
df035528 BV	189
bc7be4a9 BV	190	SR_PRIV int kecheng_kc_330b_configure(const struct sr_dev_inst *sdi)
bc7be4a9 BV	191	{
ed759a08	192	struct dev_context *devc;
bc7be4a9 BV	193	struct sr_usb_dev_inst *usb;
	194	int len, ret;
	195	unsigned char buf[7];
ed759a08	196
bc7be4a9	197	sr_dbg("Configuring device.");
ed759a08	198
bc7be4a9 BV	199	usb = sdi->conn;
bc7be4a9 BV	200	devc = sdi->priv;
ed759a08	201
bc7be4a9 BV	202	buf[0] = CMD_CONFIGURE;
	203	buf[1] = devc->sample_interval;
	204	buf[2] = devc->alarm_low;
	205	buf[3] = devc->alarm_high;
	206	buf[4] = devc->mqflags & SR_MQFLAG_SPL_TIME_WEIGHT_F ? 0 : 1;
	207	buf[5] = devc->mqflags & SR_MQFLAG_SPL_FREQ_WEIGHT_A ? 0 : 1;
	208	buf[6] = devc->data_source;
	209	ret = libusb_bulk_transfer(usb->devhdl, EP_OUT, buf, 7, &len, 5);
	210	if (ret != 0 \|\| len != 7) {
	211	sr_dbg("Failed to configure device: %s", libusb_error_name(ret));
	212	return SR_ERR;
ed759a08 BV	213	}
ed759a08 BV	214
bc7be4a9 BV	215	/* The configure command ack takes about 32ms to come in. */
	216	ret = libusb_bulk_transfer(usb->devhdl, EP_IN, buf, 1, &len, 40);
	217	if (ret != 0 \|\| len != 1) {
	218	sr_dbg("Failed to configure device (no ack): %s", libusb_error_name(ret));
	219	return SR_ERR;
	220	}
	221	if (buf[0] != (CMD_CONFIGURE \| 0x80)) {
	222	sr_dbg("Failed to configure device: invalid response 0x%2.x", buf[0]);
	223	return SR_ERR;
	224	}
	225
85ed4ab3 BV	226	devc->config_dirty = FALSE;
85ed4ab3 BV	227
bc7be4a9 BV	228	return SR_OK;
	229	}
	230
	231	SR_PRIV int kecheng_kc_330b_set_date_time(struct sr_dev_inst *sdi)
	232	{
	233	struct sr_usb_dev_inst *usb;
	234	GDateTime *dt;
	235	int len, ret;
	236	unsigned char buf[7];
	237
	238	sr_dbg("Setting device date/time.");
	239
	240	usb = sdi->conn;
	241
	242	dt = g_date_time_new_now_local();
	243	buf[0] = CMD_SET_DATE_TIME;
	244	buf[1] = g_date_time_get_year(dt) - 2000;
	245	buf[2] = g_date_time_get_month(dt);
	246	buf[3] = g_date_time_get_day_of_month(dt);
	247	buf[4] = g_date_time_get_hour(dt);
	248	buf[5] = g_date_time_get_minute(dt);
	249	buf[6] = g_date_time_get_second(dt);
	250	g_date_time_unref(dt);
	251	ret = libusb_bulk_transfer(usb->devhdl, EP_OUT, buf, 7, &len, 5);
	252	if (ret != 0 \|\| len != 7) {
	253	sr_dbg("Failed to set date/time: %s", libusb_error_name(ret));
	254	return SR_ERR;
	255	}
	256
	257	ret = libusb_bulk_transfer(usb->devhdl, EP_IN, buf, 1, &len, 10);
	258	if (ret != 0 \|\| len != 1) {
	259	sr_dbg("Failed to set date/time (no ack): %s", libusb_error_name(ret));
	260	return SR_ERR;
	261	}
	262	if (buf[0] != (CMD_SET_DATE_TIME \| 0x80)) {
	263	sr_dbg("Failed to set date/time: invalid response 0x%2.x", buf[0]);
	264	return SR_ERR;
	265	}
	266
f336618c BV	267	return SR_OK;
	268	}
	269
	270	SR_PRIV int kecheng_kc_330b_status_get(const struct sr_dev_inst *sdi,
	271	int *status)
	272	{
	273	struct sr_usb_dev_inst *usb;
	274	int len, ret;
	275	unsigned char buf;
	276
	277	sr_dbg("Getting device status.");
	278
	279	usb = sdi->conn;
	280	buf = CMD_GET_STATUS;
	281	ret = libusb_bulk_transfer(usb->devhdl, EP_OUT, &buf, 1, &len, 5);
	282	if (ret != 0 \|\| len != 1) {
	283	sr_dbg("Failed to get status: %s", libusb_error_name(ret));
	284	return SR_ERR;
	285	}
	286
	287	ret = libusb_bulk_transfer(usb->devhdl, EP_IN, &buf, 1, &len, 10);
	288	if (ret != 0 \|\| len != 1) {
	289	sr_dbg("Failed to get status (no ack): %s", libusb_error_name(ret));
	290	return SR_ERR;
	291	}
	292	/* Need either 0x84 or 0xa4. */
	293	if (buf != (CMD_GET_STATUS \| 0x80) && buf != (CMD_GET_STATUS \| 0xa0)) {
	294	sr_dbg("Failed to get status: invalid response 0x%2.x", buf);
	295	return SR_ERR;
	296	}
bc7be4a9	297
f336618c BV	298	if (buf & 0x20)
	299	*status = DEVICE_INACTIVE;
	300	else
	301	*status = DEVICE_ACTIVE;
bc7be4a9 BV	302
	303	return SR_OK;
	304	}
	305
85ed4ab3 BV	306	SR_PRIV int kecheng_kc_330b_log_info_get(const struct sr_dev_inst *sdi,
	307	unsigned char *buf)
	308	{
	309	struct sr_usb_dev_inst *usb;
	310	int len, ret;
	311
	312	sr_dbg("Getting logging info.");
	313
	314	usb = sdi->conn;
	315	buf[0] = CMD_GET_LOG_INFO;
	316	ret = libusb_bulk_transfer(usb->devhdl, EP_OUT, buf, 1, &len, 5);
	317	if (ret != 0 \|\| len != 1) {
	318	sr_dbg("Failed to get status: %s", libusb_error_name(ret));
	319	return SR_ERR;
	320	}
	321
	322	ret = libusb_bulk_transfer(usb->devhdl, EP_IN, buf, 9, &len, 10);
	323	if (ret != 0 \|\| len != 9) {
	324	sr_dbg("Failed to get status (no ack): %s", libusb_error_name(ret));
	325	return SR_ERR;
	326	}
	327	if (buf[0] != (CMD_GET_LOG_INFO \| 0x80) \|\| buf[1] > 6) {
	328	sr_dbg("Failed to get log info: invalid response 0x%2.x", buf[0]);
	329	return SR_ERR;
	330	}
	331
	332	return SR_OK;
	333	}