[libsigrok.git] / hardware / radioshack-dmm / api.c

/*
 * This file is part of the sigrok project.
 *
 * Copyright (C) 2012 Bert Vermeulen <bert@biot.com>
 * Copyright (C) 2012 Alexandru Gagniuc <mr.nuke.me@gmail.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 <glib.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <string.h>
#include <errno.h>
#include "libsigrok.h"
#include "libsigrok-internal.h"
#include "protocol.h"

#define SERIALCOMM "4800/8n1"

static const int hwopts[] = {
	SR_HWOPT_CONN,
	SR_HWOPT_SERIALCOMM,
	0,
};

static const int hwcaps[] = {
	SR_HWCAP_MULTIMETER,
	SR_HWCAP_LIMIT_SAMPLES,
	SR_HWCAP_CONTINUOUS,
	0,
};

static const char *probe_names[] = {
	"Probe",
	NULL,
};

SR_PRIV struct sr_dev_driver radioshackdmm_driver_info;
static struct sr_dev_driver *di = &radioshackdmm_driver_info;

/* Properly close and free all devices. */
static int clear_instances(void)
{
	struct sr_dev_inst *sdi;
	struct drv_context *drvc;
	struct dev_context *devc;
	GSList *l;

	if (!(drvc = di->priv))
		return SR_OK;

	drvc = di->priv;
	for (l = drvc->instances; l; l = l->next) {
		if (!(sdi = l->data))
			continue;
		if (!(devc = sdi->priv))
			continue;
		sr_serial_dev_inst_free(devc->serial);
		sr_dev_inst_free(sdi);
	}
	g_slist_free(drvc->instances);
	drvc->instances = NULL;

	return SR_OK;
}

static int hw_init(void)
{
	struct drv_context *drvc;

	if (!(drvc = g_try_malloc0(sizeof(struct drv_context)))) {
		sr_err("Driver context malloc failed.");
		return SR_ERR_MALLOC;
	}

	di->priv = drvc;

	return SR_OK;
}


static gboolean packet_valid_wrap(const uint8_t *buf)
{
	return sr_rs9lcd_packet_valid((void*)buf);
}

static GSList *rs_22_812_scan(const char *conn, const char *serialcomm)
{
	struct sr_dev_inst *sdi;
	struct drv_context *drvc;
	struct dev_context *devc;
	struct sr_probe *probe;
	struct sr_serial_dev_inst *serial;
	GSList *devices;
	int ret;
	size_t len, dropped;
	uint8_t buf[128];

	if (!(serial = sr_serial_dev_inst_new(conn, serialcomm)))
		return NULL;

	if (serial_open(serial, SERIAL_RDONLY | SERIAL_NONBLOCK) != SR_OK)
		return NULL;

	sr_info("Probing port '%s' readonly.", conn);

	drvc = di->priv;
	devices = NULL;

	/*
	 * There's no way to get an ID from the multimeter. It just sends data
	 * periodically, so the best we can do is check if the packets match
	 * the expected format.
	 */
	serial_flush(serial);

	/* Let's get a bit of data and see if we can find a packet. */
	len = sizeof(buf);

	/* 500ms gives us a window of two packets */
	ret = serial_stream_detect(serial, buf, &len, RS_22_812_PACKET_SIZE,
				   packet_valid_wrap, 500, 4800);
	if (ret != SR_OK)
		goto scan_cleanup;

	/* If we dropped more than two packets, something is wrong. */
	dropped = len - RS_22_812_PACKET_SIZE;
	if (dropped > 2 * RS_22_812_PACKET_SIZE)
		goto scan_cleanup;

	sr_info("Found RadioShack 22-812 on port '%s'.", conn);

	if (!(sdi = sr_dev_inst_new(0, SR_ST_INACTIVE, "RadioShack",
				    "22-812", "")))
		goto scan_cleanup;

	if (!(devc = g_try_malloc0(sizeof(struct dev_context)))) {
		sr_err("Device context malloc failed.");
		goto scan_cleanup;
	}

	devc->serial = serial;

	sdi->priv = devc;
	sdi->driver = di;
	if (!(probe = sr_probe_new(0, SR_PROBE_ANALOG, TRUE, "P1")))
		goto scan_cleanup;
	sdi->probes = g_slist_append(sdi->probes, probe);
	drvc->instances = g_slist_append(drvc->instances, sdi);
	devices = g_slist_append(devices, sdi);

scan_cleanup:
	serial_close(serial);

	return devices;
}

static GSList *hw_scan(GSList * options)
{
	struct sr_hwopt *opt;
	GSList *l, *devices;
	const char *conn, *serialcomm;

	conn = serialcomm = NULL;
	for (l = options; l; l = l->next) {
		opt = l->data;
		switch (opt->hwopt) {
		case SR_HWOPT_CONN:
			conn = opt->value;
			break;
		case SR_HWOPT_SERIALCOMM:
			serialcomm = opt->value;
			break;
		}
	}
	if (!conn)
		return NULL;

	if (serialcomm)
		/* Use the provided comm specs. */
		devices = rs_22_812_scan(conn, serialcomm);
	else
		/* Try the default. */
		devices = rs_22_812_scan(conn, SERIALCOMM);

	return devices;
}

static GSList *hw_dev_list(void)
{
	struct drv_context *drvc;

	drvc = di->priv;

	return drvc->instances;
}

static int hw_dev_open(struct sr_dev_inst *sdi)
{
	struct dev_context *devc;

	if (!(devc = sdi->priv)) {
		sr_err("sdi->priv was NULL.");
		return SR_ERR_BUG;
	}

	if (serial_open(devc->serial, SERIAL_RDONLY | SERIAL_NONBLOCK) != SR_OK)
		return SR_ERR;

	sdi->status = SR_ST_ACTIVE;

	return SR_OK;
}

static int hw_dev_close(struct sr_dev_inst *sdi)
{
	struct dev_context *devc;

	if (!(devc = sdi->priv)) {
		sr_err("sdi->priv was NULL.");
		return SR_ERR_BUG;
	}

	if (devc->serial && devc->serial->fd != -1) {
		serial_close(devc->serial);
		sdi->status = SR_ST_INACTIVE;
	}

	return SR_OK;
}

static int hw_cleanup(void)
{
	clear_instances();

	return SR_OK;
}

static int hw_info_get(int info_id, const void **data,
		       const struct sr_dev_inst *sdi)
{
	(void)sdi;

	switch (info_id) {
	case SR_DI_HWOPTS:
		*data = hwopts;
		break;
	case SR_DI_HWCAPS:
		*data = hwcaps;
		break;
	case SR_DI_NUM_PROBES:
		*data = GINT_TO_POINTER(1);
		break;
	case SR_DI_PROBE_NAMES:
		*data = probe_names;
		break;
	default:
		sr_err("Unknown info_id: %d.", info_id);
		return SR_ERR_ARG;
	}

	return SR_OK;
}

static int hw_dev_config_set(const struct sr_dev_inst *sdi, int hwcap,
			     const void *value)
{
	struct dev_context *devc;

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

	if (!(devc = sdi->priv)) {
		sr_err("sdi->priv was NULL.");
		return SR_ERR_BUG;
	}

	switch (hwcap) {
	case SR_HWCAP_LIMIT_SAMPLES:
		devc->limit_samples = *(const uint64_t *)value;
		sr_dbg("Setting sample limit to %" PRIu64 ".",
		       devc->limit_samples);
		break;
	default:
		sr_err("Unknown capability: %d.", hwcap);
		return SR_ERR_ARG;
		break;
	}

	return SR_OK;
}

static int hw_dev_acquisition_start(const struct sr_dev_inst *sdi,
				    void *cb_data)
{
	struct sr_datafeed_packet packet;
	struct sr_datafeed_header header;
	struct sr_datafeed_meta_analog meta;
	struct dev_context *devc;

	if (!(devc = sdi->priv)) {
		sr_err("sdi->priv was NULL.");
		return SR_ERR_BUG;
	}

	sr_dbg("Starting acquisition.");

	devc->cb_data = cb_data;

	/*
	 * Reset the number of samples to take. If we've already collected our
	 * quota, but we start a new session, and don't reset this, we'll just
	 * quit without aquiring any new samples.
	 */
	devc->num_samples = 0;

	/* Send header packet to the session bus. */
	sr_dbg("Sending SR_DF_HEADER.");
	packet.type = SR_DF_HEADER;
	packet.payload = (uint8_t *) & header;
	header.feed_version = 1;
	gettimeofday(&header.starttime, NULL);
	sr_session_send(devc->cb_data, &packet);

	/* Send metadata about the SR_DF_ANALOG packets to come. */
	sr_dbg("Sending SR_DF_META_ANALOG.");
	packet.type = SR_DF_META_ANALOG;
	packet.payload = &meta;
	meta.num_probes = 1;
	sr_session_send(devc->cb_data, &packet);

	/* Poll every 50ms, or whenever some data comes in. */
	sr_source_add(devc->serial->fd, G_IO_IN, 50,
		      radioshack_dmm_receive_data, (void *)sdi);

	return SR_OK;
}

static int hw_dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
{
	struct sr_datafeed_packet packet;
	struct dev_context *devc;

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

	if (!(devc = sdi->priv)) {
		sr_err("sdi->priv was NULL.");
		return SR_ERR_BUG;
	}

	sr_dbg("Stopping acquisition.");

	sr_source_remove(devc->serial->fd);
	hw_dev_close((struct sr_dev_inst *)sdi);

	/* Send end packet to the session bus. */
	sr_dbg("Sending SR_DF_END.");
	packet.type = SR_DF_END;
	sr_session_send(cb_data, &packet);

	return SR_OK;
}

SR_PRIV struct sr_dev_driver radioshackdmm_driver_info = {
	.name = "radioshack-dmm",
	.longname = "RadioShack 22-812/22-039 DMMs",
	.api_version = 1,
	.init = hw_init,
	.cleanup = hw_cleanup,
	.scan = hw_scan,
	.dev_list = hw_dev_list,
	.dev_clear = clear_instances,
	.dev_open = hw_dev_open,
	.dev_close = hw_dev_close,
	.info_get = hw_info_get,
	.dev_config_set = hw_dev_config_set,
	.dev_acquisition_start = hw_dev_acquisition_start,
	.dev_acquisition_stop = hw_dev_acquisition_stop,
	.priv = NULL,
};
Commit	Line	Data
d375b3c3 AG	1	/*
	2	* This file is part of the sigrok project.
	3	*
	4	* Copyright (C) 2012 Bert Vermeulen <bert@biot.com>
	5	* Copyright (C) 2012 Alexandru Gagniuc <mr.nuke.me@gmail.com>
	6	*
	7	* This program is free software: you can redistribute it and/or modify
	8	* it under the terms of the GNU General Public License as published by
	9	* the Free Software Foundation, either version 3 of the License, or
	10	* (at your option) any later version.
	11	*
	12	* This program is distributed in the hope that it will be useful,
	13	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	14	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	15	* GNU General Public License for more details.
	16	*
	17	* You should have received a copy of the GNU General Public License
	18	* along with this program. If not, see <http://www.gnu.org/licenses/>.
	19	*/
	20
	21	#include <glib.h>
d375b3c3 AG	22	#include <sys/types.h>
	23	#include <sys/stat.h>
	24	#include <fcntl.h>
	25	#include <string.h>
	26	#include <errno.h>
6f22a8ef UH	27	#include "libsigrok.h"
6f22a8ef UH	28	#include "libsigrok-internal.h"
936e27f1	29	#include "protocol.h"
d375b3c3	30
401476da BV	31	#define SERIALCOMM "4800/8n1"
401476da BV	32
d375b3c3 AG	33	static const int hwopts[] = {
	34	SR_HWOPT_CONN,
	35	SR_HWOPT_SERIALCOMM,
	36	0,
	37	};
	38
	39	static const int hwcaps[] = {
	40	SR_HWCAP_MULTIMETER,
	41	SR_HWCAP_LIMIT_SAMPLES,
	42	SR_HWCAP_CONTINUOUS,
	43	0,
	44	};
	45
	46	static const char *probe_names[] = {
	47	"Probe",
	48	NULL,
	49	};
	50
	51	SR_PRIV struct sr_dev_driver radioshackdmm_driver_info;
	52	static struct sr_dev_driver *di = &radioshackdmm_driver_info;
	53
d375b3c3 AG	54	/* Properly close and free all devices. */
	55	static int clear_instances(void)
	56	{
	57	struct sr_dev_inst *sdi;
	58	struct drv_context *drvc;
	59	struct dev_context *devc;
	60	GSList *l;
	61
	62	if (!(drvc = di->priv))
	63	return SR_OK;
	64
	65	drvc = di->priv;
	66	for (l = drvc->instances; l; l = l->next) {
	67	if (!(sdi = l->data))
	68	continue;
	69	if (!(devc = sdi->priv))
	70	continue;
	71	sr_serial_dev_inst_free(devc->serial);
	72	sr_dev_inst_free(sdi);
	73	}
	74	g_slist_free(drvc->instances);
	75	drvc->instances = NULL;
	76
	77	return SR_OK;
	78	}
	79
	80	static int hw_init(void)
	81	{
	82	struct drv_context *drvc;
	83
	84	if (!(drvc = g_try_malloc0(sizeof(struct drv_context)))) {
dccbd0ed	85	sr_err("Driver context malloc failed.");
886a52b6	86	return SR_ERR_MALLOC;
d375b3c3 AG	87	}
	88
	89	di->priv = drvc;
	90
	91	return SR_OK;
	92	}
	93
54be7c00 AG	94
	95	static gboolean packet_valid_wrap(const uint8_t *buf)
	96	{
05f134ab	97	return sr_rs9lcd_packet_valid((void*)buf);
54be7c00 AG	98	}
54be7c00 AG	99
d375b3c3 AG	100	static GSList rs_22_812_scan(const char conn, const char *serialcomm)
	101	{
	102	struct sr_dev_inst *sdi;
	103	struct drv_context *drvc;
	104	struct dev_context *devc;
	105	struct sr_probe *probe;
401476da	106	struct sr_serial_dev_inst *serial;
d375b3c3	107	GSList *devices;
54be7c00 AG	108	int ret;
	109	size_t len, dropped;
	110	uint8_t buf[128];
d375b3c3	111
401476da	112	if (!(serial = sr_serial_dev_inst_new(conn, serialcomm)))
d375b3c3	113	return NULL;
ba6383f8	114
a54dd31e	115	if (serial_open(serial, SERIAL_RDONLY \| SERIAL_NONBLOCK) != SR_OK)
d375b3c3	116	return NULL;
d375b3c3	117
ba6383f8	118	sr_info("Probing port '%s' readonly.", conn);
be8dbf3a	119
d375b3c3	120	drvc = di->priv;
d375b3c3	121	devices = NULL;
ba6383f8 UH	122
	123	/*
	124	* There's no way to get an ID from the multimeter. It just sends data
	125	* periodically, so the best we can do is check if the packets match
	126	* the expected format.
	127	*/
54be7c00	128	serial_flush(serial);
d375b3c3	129
54be7c00 AG	130	/* Let's get a bit of data and see if we can find a packet. */
54be7c00 AG	131	len = sizeof(buf);
d375b3c3	132
54be7c00 AG	133	/* 500ms gives us a window of two packets */
	134	ret = serial_stream_detect(serial, buf, &len, RS_22_812_PACKET_SIZE,
	135	packet_valid_wrap, 500, 4800);
	136	if (ret != SR_OK)
	137	goto scan_cleanup;
d375b3c3	138
54be7c00 AG	139	/* If we dropped more than two packets, something is wrong. */
	140	dropped = len - RS_22_812_PACKET_SIZE;
	141	if (dropped > 2 * RS_22_812_PACKET_SIZE)
	142	goto scan_cleanup;
d375b3c3	143
54be7c00	144	sr_info("Found RadioShack 22-812 on port '%s'.", conn);
be8dbf3a	145
54be7c00 AG	146	if (!(sdi = sr_dev_inst_new(0, SR_ST_INACTIVE, "RadioShack",
	147	"22-812", "")))
	148	goto scan_cleanup;
ba6383f8	149
54be7c00 AG	150	if (!(devc = g_try_malloc0(sizeof(struct dev_context)))) {
	151	sr_err("Device context malloc failed.");
	152	goto scan_cleanup;
	153	}
d375b3c3	154
54be7c00	155	devc->serial = serial;
d375b3c3	156
54be7c00 AG	157	sdi->priv = devc;
	158	sdi->driver = di;
	159	if (!(probe = sr_probe_new(0, SR_PROBE_ANALOG, TRUE, "P1")))
	160	goto scan_cleanup;
	161	sdi->probes = g_slist_append(sdi->probes, probe);
	162	drvc->instances = g_slist_append(drvc->instances, sdi);
	163	devices = g_slist_append(devices, sdi);
	164
	165	scan_cleanup:
401476da	166	serial_close(serial);
d375b3c3 AG	167
	168	return devices;
	169	}
	170
ba6383f8	171	static GSList hw_scan(GSList options)
d375b3c3 AG	172	{
	173	struct sr_hwopt *opt;
	174	GSList l, devices;
	175	const char conn, serialcomm;
	176
	177	conn = serialcomm = NULL;
	178	for (l = options; l; l = l->next) {
	179	opt = l->data;
	180	switch (opt->hwopt) {
	181	case SR_HWOPT_CONN:
	182	conn = opt->value;
	183	break;
	184	case SR_HWOPT_SERIALCOMM:
	185	serialcomm = opt->value;
	186	break;
	187	}
	188	}
	189	if (!conn)
	190	return NULL;
	191
401476da	192	if (serialcomm)
d375b3c3 AG	193	/* Use the provided comm specs. */
d375b3c3 AG	194	devices = rs_22_812_scan(conn, serialcomm);
401476da BV	195	else
	196	/* Try the default. */
	197	devices = rs_22_812_scan(conn, SERIALCOMM);
d375b3c3 AG	198
	199	return devices;
	200	}
	201
	202	static GSList *hw_dev_list(void)
	203	{
	204	struct drv_context *drvc;
	205
	206	drvc = di->priv;
	207
	208	return drvc->instances;
	209	}
	210
	211	static int hw_dev_open(struct sr_dev_inst *sdi)
	212	{
	213	struct dev_context *devc;
	214
	215	if (!(devc = sdi->priv)) {
dccbd0ed	216	sr_err("sdi->priv was NULL.");
d375b3c3 AG	217	return SR_ERR_BUG;
	218	}
	219
ae95ffeb	220	if (serial_open(devc->serial, SERIAL_RDONLY \| SERIAL_NONBLOCK) != SR_OK)
d375b3c3	221	return SR_ERR;
401476da	222
d375b3c3 AG	223	sdi->status = SR_ST_ACTIVE;
	224
	225	return SR_OK;
	226	}
	227
	228	static int hw_dev_close(struct sr_dev_inst *sdi)
	229	{
	230	struct dev_context *devc;
	231
	232	if (!(devc = sdi->priv)) {
dccbd0ed	233	sr_err("sdi->priv was NULL.");
d375b3c3 AG	234	return SR_ERR_BUG;
	235	}
	236
	237	if (devc->serial && devc->serial->fd != -1) {
401476da	238	serial_close(devc->serial);
d375b3c3 AG	239	sdi->status = SR_ST_INACTIVE;
	240	}
	241
	242	return SR_OK;
	243	}
	244
	245	static int hw_cleanup(void)
	246	{
	247	clear_instances();
	248
	249	return SR_OK;
	250	}
	251
	252	static int hw_info_get(int info_id, const void **data,
ba6383f8	253	const struct sr_dev_inst *sdi)
d375b3c3	254	{
ba6383f8	255	(void)sdi;
d375b3c3 AG	256
	257	switch (info_id) {
	258	case SR_DI_HWOPTS:
	259	*data = hwopts;
	260	break;
	261	case SR_DI_HWCAPS:
	262	*data = hwcaps;
	263	break;
	264	case SR_DI_NUM_PROBES:
	265	*data = GINT_TO_POINTER(1);
	266	break;
	267	case SR_DI_PROBE_NAMES:
	268	*data = probe_names;
	269	break;
	270	default:
ba6383f8	271	sr_err("Unknown info_id: %d.", info_id);
d375b3c3 AG	272	return SR_ERR_ARG;
	273	}
	274
	275	return SR_OK;
	276	}
	277
	278	static int hw_dev_config_set(const struct sr_dev_inst *sdi, int hwcap,
ba6383f8	279	const void *value)
d375b3c3 AG	280	{
	281	struct dev_context *devc;
	282
	283	if (sdi->status != SR_ST_ACTIVE)
	284	return SR_ERR;
	285
	286	if (!(devc = sdi->priv)) {
dccbd0ed	287	sr_err("sdi->priv was NULL.");
d375b3c3 AG	288	return SR_ERR_BUG;
	289	}
	290
	291	switch (hwcap) {
	292	case SR_HWCAP_LIMIT_SAMPLES:
	293	devc->limit_samples = (const uint64_t )value;
dccbd0ed	294	sr_dbg("Setting sample limit to %" PRIu64 ".",
d375b3c3 AG	295	devc->limit_samples);
	296	break;
	297	default:
dccbd0ed	298	sr_err("Unknown capability: %d.", hwcap);
ba6383f8	299	return SR_ERR_ARG;
d375b3c3 AG	300	break;
	301	}
	302
	303	return SR_OK;
	304	}
	305
	306	static int hw_dev_acquisition_start(const struct sr_dev_inst *sdi,
ba6383f8	307	void *cb_data)
d375b3c3 AG	308	{
	309	struct sr_datafeed_packet packet;
	310	struct sr_datafeed_header header;
	311	struct sr_datafeed_meta_analog meta;
	312	struct dev_context *devc;
	313
	314	if (!(devc = sdi->priv)) {
dccbd0ed	315	sr_err("sdi->priv was NULL.");
d375b3c3 AG	316	return SR_ERR_BUG;
	317	}
	318
dccbd0ed	319	sr_dbg("Starting acquisition.");
d375b3c3 AG	320
	321	devc->cb_data = cb_data;
	322
ba6383f8 UH	323	/*
ba6383f8 UH	324	* Reset the number of samples to take. If we've already collected our
be8dbf3a	325	* quota, but we start a new session, and don't reset this, we'll just
ba6383f8 UH	326	* quit without aquiring any new samples.
ba6383f8 UH	327	*/
be8dbf3a AG	328	devc->num_samples = 0;
be8dbf3a AG	329
d375b3c3	330	/* Send header packet to the session bus. */
dccbd0ed	331	sr_dbg("Sending SR_DF_HEADER.");
d375b3c3	332	packet.type = SR_DF_HEADER;
ba6383f8	333	packet.payload = (uint8_t *) & header;
d375b3c3 AG	334	header.feed_version = 1;
	335	gettimeofday(&header.starttime, NULL);
	336	sr_session_send(devc->cb_data, &packet);
	337
	338	/* Send metadata about the SR_DF_ANALOG packets to come. */
dccbd0ed	339	sr_dbg("Sending SR_DF_META_ANALOG.");
d375b3c3 AG	340	packet.type = SR_DF_META_ANALOG;
	341	packet.payload = &meta;
	342	meta.num_probes = 1;
	343	sr_session_send(devc->cb_data, &packet);
	344
ba6383f8	345	/* Poll every 50ms, or whenever some data comes in. */
d375b3c3	346	sr_source_add(devc->serial->fd, G_IO_IN, 50,
ba6383f8	347	radioshack_dmm_receive_data, (void *)sdi);
d375b3c3 AG	348
	349	return SR_OK;
	350	}
	351
69b07d14	352	static int hw_dev_acquisition_stop(struct sr_dev_inst sdi, void cb_data)
d375b3c3 AG	353	{
	354	struct sr_datafeed_packet packet;
	355	struct dev_context *devc;
	356
	357	if (sdi->status != SR_ST_ACTIVE)
	358	return SR_ERR;
	359
	360	if (!(devc = sdi->priv)) {
dccbd0ed	361	sr_err("sdi->priv was NULL.");
d375b3c3 AG	362	return SR_ERR_BUG;
	363	}
	364
dccbd0ed	365	sr_dbg("Stopping acquisition.");
d375b3c3 AG	366
	367	sr_source_remove(devc->serial->fd);
	368	hw_dev_close((struct sr_dev_inst *)sdi);
	369
	370	/* Send end packet to the session bus. */
dccbd0ed	371	sr_dbg("Sending SR_DF_END.");
d375b3c3 AG	372	packet.type = SR_DF_END;
	373	sr_session_send(cb_data, &packet);
	374
	375	return SR_OK;
	376	}
	377
	378	SR_PRIV struct sr_dev_driver radioshackdmm_driver_info = {
	379	.name = "radioshack-dmm",
ba6383f8	380	.longname = "RadioShack 22-812/22-039 DMMs",
d375b3c3 AG	381	.api_version = 1,
	382	.init = hw_init,
	383	.cleanup = hw_cleanup,
	384	.scan = hw_scan,
	385	.dev_list = hw_dev_list,
	386	.dev_clear = clear_instances,
	387	.dev_open = hw_dev_open,
	388	.dev_close = hw_dev_close,
	389	.info_get = hw_info_get,
	390	.dev_config_set = hw_dev_config_set,
	391	.dev_acquisition_start = hw_dev_acquisition_start,
	392	.dev_acquisition_stop = hw_dev_acquisition_stop,
	393	.priv = NULL,
	394	};