[libsigrok.git] / src / hardware / victor-dmm / api.c

/*
 * This file is part of the libsigrok project.
 *
 * Copyright (C) 2012 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 <glib.h>
#include <libusb.h>
#include <stdlib.h>
#include <string.h>
#include <libsigrok/libsigrok.h>
#include "libsigrok-internal.h"
#include "protocol.h"

#define VICTOR_VID 0x1244
#define VICTOR_PID 0xd237
#define VICTOR_VENDOR "Victor"
#define VICTOR_INTERFACE 0
#define VICTOR_ENDPOINT (LIBUSB_ENDPOINT_IN | 1)
static int dev_acquisition_stop(struct sr_dev_inst *sdi);

static const uint32_t drvopts[] = {
	SR_CONF_MULTIMETER,
};

static const uint32_t scanopts[] = {
	SR_CONF_CONN,
};

static const uint32_t devopts[] = {
	SR_CONF_CONTINUOUS,
	SR_CONF_LIMIT_SAMPLES | SR_CONF_SET,
	SR_CONF_LIMIT_MSEC | SR_CONF_SET,
	SR_CONF_CONN | SR_CONF_GET,
};

static GSList *scan(struct sr_dev_driver *di, GSList *options)
{
	struct drv_context *drvc;
	struct dev_context *devc;
	struct sr_dev_inst *sdi;
	struct libusb_device_descriptor des;
	libusb_device **devlist;
	GSList *devices;
	int i;
	char connection_id[64];

	(void)options;

	drvc = di->context;

	devices = NULL;
	libusb_get_device_list(drvc->sr_ctx->libusb_ctx, &devlist);
	for (i = 0; devlist[i]; i++) {
		libusb_get_device_descriptor(devlist[i], &des);

		if (des.idVendor != VICTOR_VID || des.idProduct != VICTOR_PID)
			continue;

		usb_get_port_path(devlist[i], connection_id, sizeof(connection_id));

		sdi = g_malloc0(sizeof(struct sr_dev_inst));
		sdi->status = SR_ST_INACTIVE;
		sdi->vendor = g_strdup(VICTOR_VENDOR);
		sdi->connection_id = g_strdup(connection_id);
		devc = g_malloc0(sizeof(struct dev_context));
		sr_sw_limits_init(&devc->limits);
		sdi->priv = devc;

		sr_channel_new(sdi, 0, SR_CHANNEL_ANALOG, TRUE, "P1");
		sdi->conn = sr_usb_dev_inst_new(libusb_get_bus_number(devlist[i]),
				libusb_get_device_address(devlist[i]), NULL);
		sdi->inst_type = SR_INST_USB;

		devices = g_slist_append(devices, sdi);
	}
	libusb_free_device_list(devlist, 1);

	return std_scan_complete(di, devices);
}

static int dev_open(struct sr_dev_inst *sdi)
{
	struct sr_dev_driver *di = sdi->driver;
	struct drv_context *drvc = di->context;
	struct sr_usb_dev_inst *usb;
	int ret;

	usb = sdi->conn;

	ret = sr_usb_open(drvc->sr_ctx->libusb_ctx, usb);
	if (ret != SR_OK)
		return ret;

	/* The device reports as HID class, so the kernel would have
	 * claimed it. */
	if (libusb_kernel_driver_active(usb->devhdl, 0) == 1) {
		if ((ret = libusb_detach_kernel_driver(usb->devhdl, 0)) < 0) {
			sr_err("Failed to detach kernel driver: %s.",
			       libusb_error_name(ret));
			return SR_ERR;
		}
	}

	if ((ret = libusb_claim_interface(usb->devhdl,
			VICTOR_INTERFACE))) {
		sr_err("Failed to claim interface: %s.", libusb_error_name(ret));
		return SR_ERR;
	}
	sdi->status = SR_ST_ACTIVE;

	return SR_OK;
}

static int dev_close(struct sr_dev_inst *sdi)
{
	struct sr_usb_dev_inst *usb;

	usb = sdi->conn;

	if (!usb->devhdl)
		/*  Nothing to do. */
		return SR_OK;

	libusb_release_interface(usb->devhdl, VICTOR_INTERFACE);
	libusb_close(usb->devhdl);
	usb->devhdl = NULL;
	sdi->status = SR_ST_INACTIVE;

	return SR_OK;
}

static int config_get(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
		const struct sr_channel_group *cg)
{
	struct dev_context *devc = sdi->priv;
	struct sr_usb_dev_inst *usb;
	char str[128];

	(void)cg;

	switch (key) {
	case SR_CONF_CONN:
		if (!sdi || !sdi->conn)
			return SR_ERR_ARG;
		usb = sdi->conn;
		snprintf(str, 128, "%d.%d", usb->bus, usb->address);
		*data = g_variant_new_string(str);
		break;
	case SR_CONF_LIMIT_SAMPLES:
	case SR_CONF_LIMIT_MSEC:
		return sr_sw_limits_config_get(&devc->limits, key, data);
	default:
		return SR_ERR_NA;
	}

	return SR_OK;
}

static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sdi,
		const struct sr_channel_group *cg)
{
	struct dev_context *devc;

	(void)cg;

	if (sdi->status != SR_ST_ACTIVE)
		return SR_ERR_DEV_CLOSED;

	devc = sdi->priv;

	return sr_sw_limits_config_set(&devc->limits, key, data);
}

static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
		const struct sr_channel_group *cg)
{
	(void)sdi;
	(void)cg;

	switch (key) {
	case SR_CONF_SCAN_OPTIONS:
		*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
				scanopts, ARRAY_SIZE(scanopts), sizeof(uint32_t));
		break;
	case SR_CONF_DEVICE_OPTIONS:
		if (!sdi)
			*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
					drvopts, ARRAY_SIZE(drvopts), sizeof(uint32_t));
		else
			*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
					devopts, ARRAY_SIZE(devopts), sizeof(uint32_t));
		break;
	default:
		return SR_ERR_NA;
	}

	return SR_OK;
}

static void LIBUSB_CALL receive_transfer(struct libusb_transfer *transfer)
{
	struct dev_context *devc;
	struct sr_dev_inst *sdi;
	int ret;

	sdi = transfer->user_data;
	devc = sdi->priv;
	if (transfer->status == LIBUSB_TRANSFER_NO_DEVICE) {
		/* USB device was unplugged. */
		dev_acquisition_stop(sdi);
	} else if (transfer->status == LIBUSB_TRANSFER_COMPLETED) {
		sr_dbg("Got %d-byte packet.", transfer->actual_length);
		if (transfer->actual_length == DMM_DATA_SIZE) {
			victor_dmm_receive_data(sdi, transfer->buffer);
			if (sr_sw_limits_check(&devc->limits))
				dev_acquisition_stop(sdi);
		}
	}
	/* Anything else is either an error or a timeout, which is fine:
	 * we were just going to send another transfer request anyway. */

	if (sdi->status == SR_ST_ACTIVE) {
		/* Send the same request again. */
		if ((ret = libusb_submit_transfer(transfer) != 0)) {
			sr_err("Unable to resubmit transfer: %s.",
			       libusb_error_name(ret));
			g_free(transfer->buffer);
			libusb_free_transfer(transfer);
			dev_acquisition_stop(sdi);
		}
	} else {
		/* This was the last transfer we're going to receive, so
		 * clean up now. */
		g_free(transfer->buffer);
		libusb_free_transfer(transfer);
	}
}

static int handle_events(int fd, int revents, void *cb_data)
{
	struct dev_context *devc;
	struct drv_context *drvc;
	struct sr_dev_inst *sdi;
	struct sr_dev_driver *di;
	struct timeval tv;

	(void)fd;
	(void)revents;

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

	if (sr_sw_limits_check(&devc->limits))
		dev_acquisition_stop(sdi);

	if (sdi->status == SR_ST_STOPPING) {
		usb_source_remove(sdi->session, drvc->sr_ctx);
		dev_close(sdi);
		std_session_send_df_end(sdi);
	}

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

	return TRUE;
}

static int dev_acquisition_start(const struct sr_dev_inst *sdi)
{
	struct sr_dev_driver *di = sdi->driver;
	struct drv_context *drvc = di->context;
	struct sr_usb_dev_inst *usb;
	struct libusb_transfer *transfer;
	int ret;
	unsigned char *buf;

	if (sdi->status != SR_ST_ACTIVE)
		return SR_ERR_DEV_CLOSED;

	usb = sdi->conn;

	std_session_send_df_header(sdi);

	usb_source_add(sdi->session, drvc->sr_ctx, 100,
			handle_events, (void *)sdi);

	buf = g_malloc(DMM_DATA_SIZE);
	transfer = libusb_alloc_transfer(0);
	/* Each transfer request gets 100ms to arrive before it's restarted.
	 * The device only sends 1 transfer/second no matter how many
	 * times you ask, but we want to keep step with the USB events
	 * handling above. */
	libusb_fill_interrupt_transfer(transfer, usb->devhdl,
			VICTOR_ENDPOINT, buf, DMM_DATA_SIZE, receive_transfer,
			(struct sr_dev_inst *)sdi, 100);
	if ((ret = libusb_submit_transfer(transfer) != 0)) {
		sr_err("Unable to submit transfer: %s.", libusb_error_name(ret));
		libusb_free_transfer(transfer);
		g_free(buf);
		return SR_ERR;
	}

	return SR_OK;
}

static int dev_acquisition_stop(struct sr_dev_inst *sdi)
{
	if (sdi->status != SR_ST_ACTIVE) {
		sr_err("Device not active, can't stop acquisition.");
		return SR_ERR;
	}

	sdi->status = SR_ST_STOPPING;

	return SR_OK;
}

static struct sr_dev_driver victor_dmm_driver_info = {
	.name = "victor-dmm",
	.longname = "Victor DMMs",
	.api_version = 1,
	.init = std_init,
	.cleanup = std_cleanup,
	.scan = scan,
	.dev_list = std_dev_list,
	.dev_clear = NULL,
	.config_get = config_get,
	.config_set = config_set,
	.config_list = config_list,
	.dev_open = dev_open,
	.dev_close = dev_close,
	.dev_acquisition_start = dev_acquisition_start,
	.dev_acquisition_stop = dev_acquisition_stop,
	.context = NULL,
};
SR_REGISTER_DEV_DRIVER(victor_dmm_driver_info);
Commit	Line	Data
	1	/*
	2	* This file is part of the libsigrok project.
	3	*
	4	* Copyright (C) 2012 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 <glib.h>
	22	#include <libusb.h>
	23	#include <stdlib.h>
	24	#include <string.h>
	25	#include <libsigrok/libsigrok.h>
	26	#include "libsigrok-internal.h"
	27	#include "protocol.h"
	28
	29	#define VICTOR_VID 0x1244
	30	#define VICTOR_PID 0xd237
	31	#define VICTOR_VENDOR "Victor"
	32	#define VICTOR_INTERFACE 0
	33	#define VICTOR_ENDPOINT (LIBUSB_ENDPOINT_IN \| 1)
	34	static int dev_acquisition_stop(struct sr_dev_inst *sdi);
	35
	36	static const uint32_t drvopts[] = {
	37	SR_CONF_MULTIMETER,
	38	};
	39
	40	static const uint32_t scanopts[] = {
	41	SR_CONF_CONN,
	42	};
	43
	44	static const uint32_t devopts[] = {
	45	SR_CONF_CONTINUOUS,
	46	SR_CONF_LIMIT_SAMPLES \| SR_CONF_SET,
	47	SR_CONF_LIMIT_MSEC \| SR_CONF_SET,
	48	SR_CONF_CONN \| SR_CONF_GET,
	49	};
	50
	51	static GSList scan(struct sr_dev_driver di, GSList *options)
	52	{
	53	struct drv_context *drvc;
	54	struct dev_context *devc;
	55	struct sr_dev_inst *sdi;
	56	struct libusb_device_descriptor des;
	57	libusb_device **devlist;
	58	GSList *devices;
	59	int i;
	60	char connection_id[64];
	61
	62	(void)options;
	63
	64	drvc = di->context;
	65
	66	devices = NULL;
	67	libusb_get_device_list(drvc->sr_ctx->libusb_ctx, &devlist);
	68	for (i = 0; devlist[i]; i++) {
	69	libusb_get_device_descriptor(devlist[i], &des);
	70
	71	if (des.idVendor != VICTOR_VID \|\| des.idProduct != VICTOR_PID)
	72	continue;
	73
	74	usb_get_port_path(devlist[i], connection_id, sizeof(connection_id));
	75
	76	sdi = g_malloc0(sizeof(struct sr_dev_inst));
	77	sdi->status = SR_ST_INACTIVE;
	78	sdi->vendor = g_strdup(VICTOR_VENDOR);
	79	sdi->connection_id = g_strdup(connection_id);
	80	devc = g_malloc0(sizeof(struct dev_context));
	81	sr_sw_limits_init(&devc->limits);
	82	sdi->priv = devc;
	83
	84	sr_channel_new(sdi, 0, SR_CHANNEL_ANALOG, TRUE, "P1");
	85	sdi->conn = sr_usb_dev_inst_new(libusb_get_bus_number(devlist[i]),
	86	libusb_get_device_address(devlist[i]), NULL);
	87	sdi->inst_type = SR_INST_USB;
	88
	89	devices = g_slist_append(devices, sdi);
	90	}
	91	libusb_free_device_list(devlist, 1);
	92
	93	return std_scan_complete(di, devices);
	94	}
	95
	96	static int dev_open(struct sr_dev_inst *sdi)
	97	{
	98	struct sr_dev_driver *di = sdi->driver;
	99	struct drv_context *drvc = di->context;
	100	struct sr_usb_dev_inst *usb;
	101	int ret;
	102
	103	usb = sdi->conn;
	104
	105	ret = sr_usb_open(drvc->sr_ctx->libusb_ctx, usb);
	106	if (ret != SR_OK)
	107	return ret;
	108
	109	/* The device reports as HID class, so the kernel would have
	110	* claimed it. */
	111	if (libusb_kernel_driver_active(usb->devhdl, 0) == 1) {
	112	if ((ret = libusb_detach_kernel_driver(usb->devhdl, 0)) < 0) {
	113	sr_err("Failed to detach kernel driver: %s.",
	114	libusb_error_name(ret));
	115	return SR_ERR;
	116	}
	117	}
	118
	119	if ((ret = libusb_claim_interface(usb->devhdl,
	120	VICTOR_INTERFACE))) {
	121	sr_err("Failed to claim interface: %s.", libusb_error_name(ret));
	122	return SR_ERR;
	123	}
	124	sdi->status = SR_ST_ACTIVE;
	125
	126	return SR_OK;
	127	}
	128
	129	static int dev_close(struct sr_dev_inst *sdi)
	130	{
	131	struct sr_usb_dev_inst *usb;
	132
	133	usb = sdi->conn;
	134
	135	if (!usb->devhdl)
	136	/* Nothing to do. */
	137	return SR_OK;
	138
	139	libusb_release_interface(usb->devhdl, VICTOR_INTERFACE);
	140	libusb_close(usb->devhdl);
	141	usb->devhdl = NULL;
	142	sdi->status = SR_ST_INACTIVE;
	143
	144	return SR_OK;
	145	}
	146
	147	static int config_get(uint32_t key, GVariant *data, const struct sr_dev_inst sdi,
	148	const struct sr_channel_group *cg)
	149	{
	150	struct dev_context *devc = sdi->priv;
	151	struct sr_usb_dev_inst *usb;
	152	char str[128];
	153
	154	(void)cg;
	155
	156	switch (key) {
	157	case SR_CONF_CONN:
	158	if (!sdi \|\| !sdi->conn)
	159	return SR_ERR_ARG;
	160	usb = sdi->conn;
	161	snprintf(str, 128, "%d.%d", usb->bus, usb->address);
	162	*data = g_variant_new_string(str);
	163	break;
	164	case SR_CONF_LIMIT_SAMPLES:
	165	case SR_CONF_LIMIT_MSEC:
	166	return sr_sw_limits_config_get(&devc->limits, key, data);
	167	default:
	168	return SR_ERR_NA;
	169	}
	170
	171	return SR_OK;
	172	}
	173
	174	static int config_set(uint32_t key, GVariant data, const struct sr_dev_inst sdi,
	175	const struct sr_channel_group *cg)
	176	{
	177	struct dev_context *devc;
	178
	179	(void)cg;
	180
	181	if (sdi->status != SR_ST_ACTIVE)
	182	return SR_ERR_DEV_CLOSED;
	183
	184	devc = sdi->priv;
	185
	186	return sr_sw_limits_config_set(&devc->limits, key, data);
	187	}
	188
	189	static int config_list(uint32_t key, GVariant *data, const struct sr_dev_inst sdi,
	190	const struct sr_channel_group *cg)
	191	{
	192	(void)sdi;
	193	(void)cg;
	194
	195	switch (key) {
	196	case SR_CONF_SCAN_OPTIONS:
	197	*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
	198	scanopts, ARRAY_SIZE(scanopts), sizeof(uint32_t));
	199	break;
	200	case SR_CONF_DEVICE_OPTIONS:
	201	if (!sdi)
	202	*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
	203	drvopts, ARRAY_SIZE(drvopts), sizeof(uint32_t));
	204	else
	205	*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
	206	devopts, ARRAY_SIZE(devopts), sizeof(uint32_t));
	207	break;
	208	default:
	209	return SR_ERR_NA;
	210	}
	211
	212	return SR_OK;
	213	}
	214
	215	static void LIBUSB_CALL receive_transfer(struct libusb_transfer *transfer)
	216	{
	217	struct dev_context *devc;
	218	struct sr_dev_inst *sdi;
	219	int ret;
	220
	221	sdi = transfer->user_data;
	222	devc = sdi->priv;
	223	if (transfer->status == LIBUSB_TRANSFER_NO_DEVICE) {
	224	/* USB device was unplugged. */
	225	dev_acquisition_stop(sdi);
	226	} else if (transfer->status == LIBUSB_TRANSFER_COMPLETED) {
	227	sr_dbg("Got %d-byte packet.", transfer->actual_length);
	228	if (transfer->actual_length == DMM_DATA_SIZE) {
	229	victor_dmm_receive_data(sdi, transfer->buffer);
	230	if (sr_sw_limits_check(&devc->limits))
	231	dev_acquisition_stop(sdi);
	232	}
	233	}
	234	/* Anything else is either an error or a timeout, which is fine:
	235	* we were just going to send another transfer request anyway. */
	236
	237	if (sdi->status == SR_ST_ACTIVE) {
	238	/* Send the same request again. */
	239	if ((ret = libusb_submit_transfer(transfer) != 0)) {
	240	sr_err("Unable to resubmit transfer: %s.",
	241	libusb_error_name(ret));
	242	g_free(transfer->buffer);
	243	libusb_free_transfer(transfer);
	244	dev_acquisition_stop(sdi);
	245	}
	246	} else {
	247	/* This was the last transfer we're going to receive, so
	248	* clean up now. */
	249	g_free(transfer->buffer);
	250	libusb_free_transfer(transfer);
	251	}
	252	}
	253
	254	static int handle_events(int fd, int revents, void *cb_data)
	255	{
	256	struct dev_context *devc;
	257	struct drv_context *drvc;
	258	struct sr_dev_inst *sdi;
	259	struct sr_dev_driver *di;
	260	struct timeval tv;
	261
	262	(void)fd;
	263	(void)revents;
	264
	265	sdi = cb_data;
	266	devc = sdi->priv;
	267	di = sdi->driver;
	268	drvc = di->context;
	269
	270	if (sr_sw_limits_check(&devc->limits))
	271	dev_acquisition_stop(sdi);
	272
	273	if (sdi->status == SR_ST_STOPPING) {
	274	usb_source_remove(sdi->session, drvc->sr_ctx);
	275	dev_close(sdi);
	276	std_session_send_df_end(sdi);
	277	}
	278
	279	memset(&tv, 0, sizeof(struct timeval));
	280	libusb_handle_events_timeout_completed(drvc->sr_ctx->libusb_ctx, &tv,
	281	NULL);
	282
	283	return TRUE;
	284	}
	285
	286	static int dev_acquisition_start(const struct sr_dev_inst *sdi)
	287	{
	288	struct sr_dev_driver *di = sdi->driver;
	289	struct drv_context *drvc = di->context;
	290	struct sr_usb_dev_inst *usb;
	291	struct libusb_transfer *transfer;
	292	int ret;
	293	unsigned char *buf;
	294
	295	if (sdi->status != SR_ST_ACTIVE)
	296	return SR_ERR_DEV_CLOSED;
	297
	298	usb = sdi->conn;
	299
	300	std_session_send_df_header(sdi);
	301
	302	usb_source_add(sdi->session, drvc->sr_ctx, 100,
	303	handle_events, (void *)sdi);
	304
	305	buf = g_malloc(DMM_DATA_SIZE);
	306	transfer = libusb_alloc_transfer(0);
	307	/* Each transfer request gets 100ms to arrive before it's restarted.
	308	* The device only sends 1 transfer/second no matter how many
	309	* times you ask, but we want to keep step with the USB events
	310	* handling above. */
	311	libusb_fill_interrupt_transfer(transfer, usb->devhdl,
	312	VICTOR_ENDPOINT, buf, DMM_DATA_SIZE, receive_transfer,
	313	(struct sr_dev_inst *)sdi, 100);
	314	if ((ret = libusb_submit_transfer(transfer) != 0)) {
	315	sr_err("Unable to submit transfer: %s.", libusb_error_name(ret));
	316	libusb_free_transfer(transfer);
	317	g_free(buf);
	318	return SR_ERR;
	319	}
	320
	321	return SR_OK;
	322	}
	323
	324	static int dev_acquisition_stop(struct sr_dev_inst *sdi)
	325	{
	326	if (sdi->status != SR_ST_ACTIVE) {
	327	sr_err("Device not active, can't stop acquisition.");
	328	return SR_ERR;
	329	}
	330
	331	sdi->status = SR_ST_STOPPING;
	332
	333	return SR_OK;
	334	}
	335
	336	static struct sr_dev_driver victor_dmm_driver_info = {
	337	.name = "victor-dmm",
	338	.longname = "Victor DMMs",
	339	.api_version = 1,
	340	.init = std_init,
	341	.cleanup = std_cleanup,
	342	.scan = scan,
	343	.dev_list = std_dev_list,
	344	.dev_clear = NULL,
	345	.config_get = config_get,
	346	.config_set = config_set,
	347	.config_list = config_list,
	348	.dev_open = dev_open,
	349	.dev_close = dev_close,
	350	.dev_acquisition_start = dev_acquisition_start,
	351	.dev_acquisition_stop = dev_acquisition_stop,
	352	.context = NULL,
	353	};
	354	SR_REGISTER_DEV_DRIVER(victor_dmm_driver_info);