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

/*
 * This file is part of the sigrok 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 <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 "fluke-dmm.h"

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

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

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

static char *scan_conn[] = {
	/* 287/289 */
	"115200/8n1",
	/* 187/189 */
	"9600/8n1",
	/* Scopemeter 190 series */
	"1200/8n1",
	NULL
};

static const struct flukedmm_profile supported_flukedmm[] = {
	{ FLUKE_187, "187", 100, 1000 },
	{ FLUKE_287, "287", 100, 1000 },
	{ FLUKE_190, "199B", 1000, 3500 },
};


/* 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(struct sr_context *sr_ctx)
{
	struct drv_context *drvc;

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

	drvc->sr_ctx = sr_ctx;
	di->priv = drvc;

	return SR_OK;
}

static GSList *fluke_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 retry, len, i, s;
	char buf[128], *b, **tokens;

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

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

	drvc = di->priv;
	b = buf;
	retry = 0;
	devices = NULL;
	/* We'll try the discovery sequence three times in case the device
	 * is not in an idle state when we send ID. */
	while (!devices && retry < 3) {
		retry++;
		serial_flush(serial);
		if (serial_write(serial, "ID\r", 3) == -1) {
			sr_err("Unable to send ID string: %s.",
			       strerror(errno));
			continue;
		}

		/* Response is first a CMD_ACK byte (ASCII '0' for OK,
		 * or '1' to signify an error. */
		len = 128;
		serial_readline(serial, &b, &len, 150);
		if (len != 1)
			continue;
		if (buf[0] != '0')
			continue;

		/* If CMD_ACK was OK, ID string follows. */
		len = 128;
		serial_readline(serial, &b, &len, 850);
		if (len < 10)
			continue;
		if (strcspn(buf, ",") < 15)
			/* Looks like it's comma-separated. */
			tokens = g_strsplit(buf, ",", 3);
		else
			/* Fluke 199B, at least, uses semicolon. */
			tokens = g_strsplit(buf, ";", 3);
		if (!strncmp("FLUKE", tokens[0], 5)
				&& tokens[1] && tokens[2]) {
			for (i = 0; supported_flukedmm[i].model; i++) {
				if (strcmp(supported_flukedmm[i].modelname, tokens[0] + 6))
					continue;
				/* Skip leading spaces in version number. */
				for (s = 0; tokens[1][s] == ' '; s++);
				if (!(sdi = sr_dev_inst_new(0, SR_ST_INACTIVE, "Fluke",
						tokens[0] + 6, tokens[1] + s)))
					return NULL;
				if (!(devc = g_try_malloc0(sizeof(struct dev_context)))) {
					sr_err("Device context malloc failed.");
					return NULL;
				}
				devc->profile = &supported_flukedmm[i];
				devc->serial = serial;
				sdi->priv = devc;
				sdi->driver = di;
				if (!(probe = sr_probe_new(0, SR_PROBE_ANALOG, TRUE, "P1")))
					return NULL;
				sdi->probes = g_slist_append(sdi->probes, probe);
				drvc->instances = g_slist_append(drvc->instances, sdi);
				devices = g_slist_append(devices, sdi);
				break;
			}
		}
		g_strfreev(tokens);
		if (devices)
			/* Found one. */
			break;
	}
	serial_close(serial);
	if (!devices)
		sr_serial_dev_inst_free(serial);

	return devices;
}

static GSList *hw_scan(GSList *options)
{
	struct sr_hwopt *opt;
	GSList *l, *devices;
	int i;
	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 = fluke_scan(conn, serialcomm);
	} else {
		for (i = 0; scan_conn[i]; i++) {
			if ((devices = fluke_scan(conn, scan_conn[i])))
				break;
			/* The Scopemeter 199B, at least, requires this
			 * after all the 115k/9.6k confusion. */
			g_usleep(5000);
		}
	}

	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_RDWR | 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;
	default:
		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_MSEC:
		/* TODO: not yet implemented */
		if (*(const uint64_t *)value == 0) {
			sr_err("LIMIT_MSEC can't be 0.");
			return SR_ERR;
		}
		devc->limit_msec = *(const uint64_t *)value;
		sr_dbg("Setting time limit to %" PRIu64 "ms.",
		       devc->limit_msec);
		break;
	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;
		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;

	/* 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 100ms, or whenever some data comes in. */
	sr_source_add(devc->serial->fd, G_IO_IN, 50, fluke_receive_data, (void *)sdi);

	if (serial_write(devc->serial, "QM\r", 3) == -1) {
		sr_err("Unable to send QM: %s.", strerror(errno));
		return SR_ERR;
	}
	devc->cmd_sent_at = g_get_monotonic_time() / 1000;
	devc->expect_response = TRUE;

	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 flukedmm_driver_info = {
	.name = "fluke-dmm",
	.longname = "Fluke 18x/28x series 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
883a2e9e BV	1	/*
	2	* This file is part of the sigrok 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 <glib.h>
4f958423 BV	21	#include <sys/types.h>
	22	#include <sys/stat.h>
	23	#include <fcntl.h>
	24	#include <string.h>
	25	#include <errno.h>
6f22a8ef UH	26	#include "libsigrok.h"
	27	#include "libsigrok-internal.h"
	28	#include "fluke-dmm.h"
883a2e9e	29
d3f8f141 BV	30	static const int hwopts[] = {
	31	SR_HWOPT_CONN,
	32	SR_HWOPT_SERIALCOMM,
	33	0,
	34	};
	35
	36	static const int hwcaps[] = {
	37	SR_HWCAP_MULTIMETER,
	38	SR_HWCAP_LIMIT_SAMPLES,
	39	SR_HWCAP_LIMIT_MSEC,
	40	SR_HWCAP_CONTINUOUS,
	41	0,
	42	};
	43
e7edd64f BV	44	SR_PRIV struct sr_dev_driver flukedmm_driver_info;
e7edd64f BV	45	static struct sr_dev_driver *di = &flukedmm_driver_info;
883a2e9e	46
9fa09680 BV	47	static char *scan_conn[] = {
	48	/* 287/289 */
	49	"115200/8n1",
	50	/* 187/189 */
	51	"9600/8n1",
	52	/* Scopemeter 190 series */
	53	"1200/8n1",
	54	NULL
	55	};
	56
4f958423	57	static const struct flukedmm_profile supported_flukedmm[] = {
d4b11de0 BV	58	{ FLUKE_187, "187", 100, 1000 },
	59	{ FLUKE_287, "287", 100, 1000 },
	60	{ FLUKE_190, "199B", 1000, 3500 },
4f958423 BV	61	};
4f958423 BV	62
883a2e9e BV	63
	64	/* Properly close and free all devices. */
	65	static int clear_instances(void)
	66	{
	67	struct sr_dev_inst *sdi;
	68	struct drv_context *drvc;
	69	struct dev_context *devc;
	70	GSList *l;
	71
4f958423 BV	72	if (!(drvc = di->priv))
	73	return SR_OK;
	74
883a2e9e BV	75	drvc = di->priv;
883a2e9e BV	76	for (l = drvc->instances; l; l = l->next) {
4f958423	77	if (!(sdi = l->data))
883a2e9e	78	continue;
4f958423	79	if (!(devc = sdi->priv))
883a2e9e	80	continue;
4f958423	81	sr_serial_dev_inst_free(devc->serial);
883a2e9e BV	82	sr_dev_inst_free(sdi);
883a2e9e BV	83	}
883a2e9e BV	84	g_slist_free(drvc->instances);
	85	drvc->instances = NULL;
	86
	87	return SR_OK;
	88	}
	89
34f06b90	90	static int hw_init(struct sr_context *sr_ctx)
883a2e9e BV	91	{
	92	struct drv_context *drvc;
	93
	94	if (!(drvc = g_try_malloc0(sizeof(struct drv_context)))) {
31d84da3	95	sr_err("Driver context malloc failed.");
886a52b6	96	return SR_ERR_MALLOC;
883a2e9e BV	97	}
883a2e9e BV	98
1ebe4b4e	99	drvc->sr_ctx = sr_ctx;
883a2e9e BV	100	di->priv = drvc;
	101
	102	return SR_OK;
	103	}
	104
41298320	105	static GSList fluke_scan(const char conn, const char *serialcomm)
883a2e9e	106	{
4f958423	107	struct sr_dev_inst *sdi;
883a2e9e	108	struct drv_context *drvc;
4f958423	109	struct dev_context *devc;
4f958423	110	struct sr_probe *probe;
58d03f03	111	struct sr_serial_dev_inst *serial;
41298320	112	GSList *devices;
58d03f03	113	int retry, len, i, s;
fb480d57	114	char buf[128], b, *tokens;
883a2e9e	115
58d03f03	116	if (!(serial = sr_serial_dev_inst_new(conn, serialcomm)))
4f958423	117	return NULL;
58d03f03	118
a54dd31e	119	if (serial_open(serial, SERIAL_RDWR \| SERIAL_NONBLOCK) != SR_OK)
4f958423	120	return NULL;
4f958423	121
41298320	122	drvc = di->priv;
fb480d57 BV	123	b = buf;
fb480d57 BV	124	retry = 0;
41298320	125	devices = NULL;
fb480d57 BV	126	/* We'll try the discovery sequence three times in case the device
	127	* is not in an idle state when we send ID. */
	128	while (!devices && retry < 3) {
	129	retry++;
58d03f03 BV	130	serial_flush(serial);
58d03f03 BV	131	if (serial_write(serial, "ID\r", 3) == -1) {
31d84da3 UH	132	sr_err("Unable to send ID string: %s.",
31d84da3 UH	133	strerror(errno));
fb480d57 BV	134	continue;
fb480d57 BV	135	}
4f958423	136
fb480d57 BV	137	/* Response is first a CMD_ACK byte (ASCII '0' for OK,
	138	* or '1' to signify an error. */
	139	len = 128;
58d03f03	140	serial_readline(serial, &b, &len, 150);
fb480d57 BV	141	if (len != 1)
fb480d57 BV	142	continue;
41298320	143	if (buf[0] != '0')
fb480d57	144	continue;
4f958423	145
fb480d57 BV	146	/* If CMD_ACK was OK, ID string follows. */
fb480d57 BV	147	len = 128;
9fa09680	148	serial_readline(serial, &b, &len, 850);
fb480d57 BV	149	if (len < 10)
fb480d57 BV	150	continue;
9fa09680 BV	151	if (strcspn(buf, ",") < 15)
	152	/* Looks like it's comma-separated. */
	153	tokens = g_strsplit(buf, ",", 3);
	154	else
	155	/* Fluke 199B, at least, uses semicolon. */
	156	tokens = g_strsplit(buf, ";", 3);
fb480d57 BV	157	if (!strncmp("FLUKE", tokens[0], 5)
	158	&& tokens[1] && tokens[2]) {
	159	for (i = 0; supported_flukedmm[i].model; i++) {
	160	if (strcmp(supported_flukedmm[i].modelname, tokens[0] + 6))
	161	continue;
	162	/* Skip leading spaces in version number. */
	163	for (s = 0; tokens[1][s] == ' '; s++);
	164	if (!(sdi = sr_dev_inst_new(0, SR_ST_INACTIVE, "Fluke",
	165	tokens[0] + 6, tokens[1] + s)))
	166	return NULL;
	167	if (!(devc = g_try_malloc0(sizeof(struct dev_context)))) {
31d84da3	168	sr_err("Device context malloc failed.");
fb480d57 BV	169	return NULL;
	170	}
	171	devc->profile = &supported_flukedmm[i];
58d03f03	172	devc->serial = serial;
fb480d57 BV	173	sdi->priv = devc;
	174	sdi->driver = di;
	175	if (!(probe = sr_probe_new(0, SR_PROBE_ANALOG, TRUE, "P1")))
	176	return NULL;
	177	sdi->probes = g_slist_append(sdi->probes, probe);
	178	drvc->instances = g_slist_append(drvc->instances, sdi);
	179	devices = g_slist_append(devices, sdi);
	180	break;
4f958423	181	}
4f958423	182	}
fb480d57	183	g_strfreev(tokens);
9fa09680 BV	184	if (devices)
	185	/* Found one. */
	186	break;
4f958423	187	}
58d03f03 BV	188	serial_close(serial);
	189	if (!devices)
	190	sr_serial_dev_inst_free(serial);
883a2e9e BV	191
	192	return devices;
	193	}
	194
41298320 BV	195	static GSList hw_scan(GSList options)
41298320 BV	196	{
41298320 BV	197	struct sr_hwopt *opt;
41298320 BV	198	GSList l, devices;
9fa09680	199	int i;
41298320 BV	200	const char conn, serialcomm;
	201
	202	conn = serialcomm = NULL;
	203	for (l = options; l; l = l->next) {
	204	opt = l->data;
	205	switch (opt->hwopt) {
	206	case SR_HWOPT_CONN:
	207	conn = opt->value;
	208	break;
	209	case SR_HWOPT_SERIALCOMM:
	210	serialcomm = opt->value;
	211	break;
	212	}
	213	}
	214	if (!conn)
	215	return NULL;
	216
	217	if (serialcomm) {
	218	/* Use the provided comm specs. */
	219	devices = fluke_scan(conn, serialcomm);
	220	} else {
9fa09680 BV	221	for (i = 0; scan_conn[i]; i++) {
	222	if ((devices = fluke_scan(conn, scan_conn[i])))
	223	break;
	224	/* The Scopemeter 199B, at least, requires this
	225	* after all the 115k/9.6k confusion. */
	226	g_usleep(5000);
	227	}
41298320 BV	228	}
	229
	230	return devices;
	231	}
	232
883a2e9e BV	233	static GSList *hw_dev_list(void)
	234	{
	235	struct drv_context *drvc;
	236
	237	drvc = di->priv;
	238
	239	return drvc->instances;
	240	}
	241
	242	static int hw_dev_open(struct sr_dev_inst *sdi)
	243	{
41298320	244	struct dev_context *devc;
883a2e9e	245
41298320	246	if (!(devc = sdi->priv)) {
31d84da3	247	sr_err("sdi->priv was NULL.");
41298320 BV	248	return SR_ERR_BUG;
	249	}
	250
a54dd31e	251	if (serial_open(devc->serial, SERIAL_RDWR \| SERIAL_NONBLOCK) != SR_OK)
41298320	252	return SR_ERR;
58d03f03	253
41298320	254	sdi->status = SR_ST_ACTIVE;
883a2e9e BV	255
	256	return SR_OK;
	257	}
	258
	259	static int hw_dev_close(struct sr_dev_inst *sdi)
	260	{
d3f8f141	261	struct dev_context *devc;
883a2e9e	262
d3f8f141	263	if (!(devc = sdi->priv)) {
31d84da3	264	sr_err("sdi->priv was NULL.");
d3f8f141 BV	265	return SR_ERR_BUG;
	266	}
	267
	268	if (devc->serial && devc->serial->fd != -1) {
58d03f03	269	serial_close(devc->serial);
d3f8f141 BV	270	sdi->status = SR_ST_INACTIVE;
d3f8f141 BV	271	}
883a2e9e BV	272
	273	return SR_OK;
	274	}
	275
	276	static int hw_cleanup(void)
	277	{
	278
	279	clear_instances();
	280
883a2e9e BV	281	return SR_OK;
	282	}
	283
	284	static int hw_info_get(int info_id, const void **data,
	285	const struct sr_dev_inst *sdi)
	286	{
d3f8f141	287	(void)sdi;
883a2e9e BV	288
883a2e9e BV	289	switch (info_id) {
d3f8f141 BV	290	case SR_DI_HWOPTS:
	291	*data = hwopts;
	292	break;
	293	case SR_DI_HWCAPS:
	294	*data = hwcaps;
	295	break;
883a2e9e BV	296	default:
	297	return SR_ERR_ARG;
	298	}
	299
	300	return SR_OK;
	301	}
	302
	303	static int hw_dev_config_set(const struct sr_dev_inst *sdi, int hwcap,
	304	const void *value)
	305	{
d3f8f141	306	struct dev_context *devc;
883a2e9e BV	307
	308	if (sdi->status != SR_ST_ACTIVE)
	309	return SR_ERR;
	310
d3f8f141	311	if (!(devc = sdi->priv)) {
31d84da3	312	sr_err("sdi->priv was NULL.");
d3f8f141 BV	313	return SR_ERR_BUG;
	314	}
	315
883a2e9e	316	switch (hwcap) {
d3f8f141 BV	317	case SR_HWCAP_LIMIT_MSEC:
	318	/* TODO: not yet implemented */
	319	if ((const uint64_t )value == 0) {
31d84da3	320	sr_err("LIMIT_MSEC can't be 0.");
d3f8f141 BV	321	return SR_ERR;
	322	}
	323	devc->limit_msec = (const uint64_t )value;
31d84da3	324	sr_dbg("Setting time limit to %" PRIu64 "ms.",
d3f8f141 BV	325	devc->limit_msec);
	326	break;
	327	case SR_HWCAP_LIMIT_SAMPLES:
	328	devc->limit_samples = (const uint64_t )value;
31d84da3	329	sr_dbg("Setting sample limit to %" PRIu64 ".",
d3f8f141 BV	330	devc->limit_samples);
d3f8f141 BV	331	break;
883a2e9e	332	default:
31d84da3	333	sr_err("Unknown capability: %d.", hwcap);
d3f8f141 BV	334	return SR_ERR;
d3f8f141 BV	335	break;
883a2e9e BV	336	}
883a2e9e BV	337
d3f8f141	338	return SR_OK;
883a2e9e BV	339	}
	340
	341	static int hw_dev_acquisition_start(const struct sr_dev_inst *sdi,
	342	void *cb_data)
	343	{
d3f8f141 BV	344	struct sr_datafeed_packet packet;
	345	struct sr_datafeed_header header;
	346	struct sr_datafeed_meta_analog meta;
	347	struct dev_context *devc;
	348
	349	if (!(devc = sdi->priv)) {
31d84da3	350	sr_err("sdi->priv was NULL.");
d3f8f141 BV	351	return SR_ERR_BUG;
	352	}
	353
31d84da3	354	sr_dbg("Starting acquisition.");
d3f8f141 BV	355
	356	devc->cb_data = cb_data;
	357
	358	/* Send header packet to the session bus. */
31d84da3	359	sr_dbg("Sending SR_DF_HEADER.");
d3f8f141 BV	360	packet.type = SR_DF_HEADER;
	361	packet.payload = (uint8_t *)&header;
	362	header.feed_version = 1;
	363	gettimeofday(&header.starttime, NULL);
	364	sr_session_send(devc->cb_data, &packet);
883a2e9e	365
d3f8f141	366	/* Send metadata about the SR_DF_ANALOG packets to come. */
31d84da3	367	sr_dbg("Sending SR_DF_META_ANALOG.");
d3f8f141 BV	368	packet.type = SR_DF_META_ANALOG;
	369	packet.payload = &meta;
	370	meta.num_probes = 1;
	371	sr_session_send(devc->cb_data, &packet);
	372
	373	/* Poll every 100ms, or whenever some data comes in. */
d38d2ef0 BV	374	sr_source_add(devc->serial->fd, G_IO_IN, 50, fluke_receive_data, (void *)sdi);
d38d2ef0 BV	375
58d03f03	376	if (serial_write(devc->serial, "QM\r", 3) == -1) {
31d84da3	377	sr_err("Unable to send QM: %s.", strerror(errno));
d38d2ef0 BV	378	return SR_ERR;
	379	}
	380	devc->cmd_sent_at = g_get_monotonic_time() / 1000;
	381	devc->expect_response = TRUE;
883a2e9e BV	382
	383	return SR_OK;
	384	}
	385
69b07d14	386	static int hw_dev_acquisition_stop(struct sr_dev_inst sdi, void cb_data)
883a2e9e	387	{
d3f8f141 BV	388	struct sr_datafeed_packet packet;
d3f8f141 BV	389	struct dev_context *devc;
883a2e9e BV	390
	391	if (sdi->status != SR_ST_ACTIVE)
	392	return SR_ERR;
	393
d3f8f141	394	if (!(devc = sdi->priv)) {
31d84da3	395	sr_err("sdi->priv was NULL.");
d3f8f141 BV	396	return SR_ERR_BUG;
	397	}
	398
31d84da3	399	sr_dbg("Stopping acquisition.");
d3f8f141 BV	400
	401	sr_source_remove(devc->serial->fd);
	402	hw_dev_close((struct sr_dev_inst *)sdi);
	403
	404	/* Send end packet to the session bus. */
31d84da3	405	sr_dbg("Sending SR_DF_END.");
d3f8f141 BV	406	packet.type = SR_DF_END;
d3f8f141 BV	407	sr_session_send(cb_data, &packet);
883a2e9e BV	408
	409	return SR_OK;
	410	}
	411
e7edd64f	412	SR_PRIV struct sr_dev_driver flukedmm_driver_info = {
883a2e9e BV	413	.name = "fluke-dmm",
	414	.longname = "Fluke 18x/28x series DMMs",
	415	.api_version = 1,
	416	.init = hw_init,
	417	.cleanup = hw_cleanup,
	418	.scan = hw_scan,
	419	.dev_list = hw_dev_list,
	420	.dev_clear = clear_instances,
	421	.dev_open = hw_dev_open,
	422	.dev_close = hw_dev_close,
	423	.info_get = hw_info_get,
	424	.dev_config_set = hw_dev_config_set,
	425	.dev_acquisition_start = hw_dev_acquisition_start,
	426	.dev_acquisition_stop = hw_dev_acquisition_stop,
	427	.priv = NULL,
	428	};