[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,
};

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

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

static const struct flukedmm_profile supported_flukedmm[] = {
	{ FLUKE_187, "187", 100 },
	{ FLUKE_287, "287", 100 },
};


/* 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 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, O_RDWR|O_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, 150);
		if (len < 10)
			continue;
		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);
	}
	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;
	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 {
		/* Try 115200, as used on 287/289. */
		devices = fluke_scan(conn, "115200/8n1");
		if (!devices)
			/* Fall back to 9600 for 187/189. */
			devices = fluke_scan(conn, "9600/8n1");
	}

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