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