[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 "libsigrok.h"
#include "libsigrok-internal.h"
#include "config.h"
#include "fluke-dmm.h"
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <string.h>
#include <errno.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" },
	{ FLUKE_287, "287" },
};


/* 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("fluke-dmm: driver context malloc failed.");
		return SR_ERR;
	}

	di->priv = drvc;

	return SR_OK;
}

static int serial_readline(int fd, char **buf, int *buflen, uint64_t timeout_ms)
{
	uint64_t start;
	int maxlen, len;

	timeout_ms *= 1000;
	start = g_get_monotonic_time();

	maxlen = *buflen;
	*buflen = len = 0;
	while(1) {
		len = maxlen - *buflen - 1;
		if (len < 1)
			break;
		len = serial_read(fd, *buf + *buflen, 1);
		if (len > 0) {
			*buflen += len;
			*(*buf + *buflen) = '\0';
			if (*buflen > 0 && *(*buf + *buflen - 1) == '\r') {
				/* Strip LF and terminate. */
				*(*buf + --*buflen) = '\0';
				break;
			}
		}
		if (g_get_monotonic_time() - start > timeout_ms)
			/* Timeout */
			break;
		g_usleep(2000);
	}
	sr_dbg("fluke-dmm: received %d: '%s'", *buflen, *buf);

	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;
	GSList *devices;
	int fd, retry, len, i, s;
	char buf[128], *b, **tokens;

	if ((fd = serial_open(conn, O_RDWR|O_NONBLOCK)) == -1) {
		sr_err("fluke-dmm: unable to open %s: %s", conn, strerror(errno));
		return NULL;
	}
	if (serial_set_paramstr(fd, serialcomm) != SR_OK) {
		sr_err("fluke-dmm: unable to set serial parameters");
		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(fd);
		if (serial_write(fd, "ID\r", 3) == -1) {
			sr_err("fluke-dmm: 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(fd, &b, &len, 150);
		if (len != 1)
			continue;
		if (buf[0] != '0')
			continue;

		/* If CMD_ACK was OK, ID string follows. */
		len = 128;
		serial_readline(fd, &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_dbg("fluke-dmm: failed to malloc devc");
					return NULL;
				}
				devc->profile = &supported_flukedmm[i];
				devc->serial = sr_serial_dev_inst_new(conn, -1);
				devc->serialcomm = g_strdup(serialcomm);
				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(fd);

	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("fluke-dmm: sdi->priv was NULL.");
		return SR_ERR_BUG;
	}

	devc->serial->fd = serial_open(devc->serial->port, O_RDWR | O_NONBLOCK);
	if (devc->serial->fd == -1) {
		sr_err("fluke-dmm: Couldn't open serial port '%s'.",
		       devc->serial->port);
		return SR_ERR;
	}
	if (serial_set_paramstr(devc->serial->fd, devc->serialcomm) != SR_OK) {
		sr_err("fluke-dmm: unable to set serial parameters");
		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("fluke-dmm: sdi->priv was NULL.");
		return SR_ERR_BUG;
	}

	if (devc->serial && devc->serial->fd != -1) {
		serial_close(devc->serial->fd);
		devc->serial->fd = -1;
		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("fluke-dmm: 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("fluke-dmm: LIMIT_MSEC can't be 0.");
			return SR_ERR;
		}
		devc->limit_msec = *(const uint64_t *)value;
		sr_dbg("fluke-dmm: Setting time limit to %" PRIu64 "ms.",
		       devc->limit_msec);
		break;
	case SR_HWCAP_LIMIT_SAMPLES:
		devc->limit_samples = *(const uint64_t *)value;
		sr_dbg("fluke-dmm: Setting sample limit to %" PRIu64 ".",
		       devc->limit_samples);
		break;
	default:
		sr_err("fluke-dmm: 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("fluke-dmm: sdi->priv was NULL.");
		return SR_ERR_BUG;
	}

	sr_dbg("fluke-dmm: Starting acquisition.");

	devc->cb_data = cb_data;

	/* Send header packet to the session bus. */
	sr_dbg("fluke-dmm: 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("fluke-dmm: 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, 100, fluke_receive_data, (void *)sdi);

	return SR_OK;
}

static int hw_dev_acquisition_stop(const 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("fluke-dmm: sdi->priv was NULL.");
		return SR_ERR_BUG;
	}

	sr_dbg("fluke-dmm: 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("fluke-dmm: 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>
	21	#include "libsigrok.h"
	22	#include "libsigrok-internal.h"
	23	#include "config.h"
4f958423 BV	24	#include "fluke-dmm.h"
	25	#include <sys/types.h>
	26	#include <sys/stat.h>
	27	#include <fcntl.h>
	28	#include <string.h>
	29	#include <errno.h>
883a2e9e	30
d3f8f141 BV	31	static const int hwopts[] = {
	32	SR_HWOPT_CONN,
	33	SR_HWOPT_SERIALCOMM,
	34	0,
	35	};
	36
	37	static const int hwcaps[] = {
	38	SR_HWCAP_MULTIMETER,
	39	SR_HWCAP_LIMIT_SAMPLES,
	40	SR_HWCAP_LIMIT_MSEC,
	41	SR_HWCAP_CONTINUOUS,
	42	0,
	43	};
	44
	45	static const char *probe_names[] = {
	46	"Probe",
	47	NULL,
	48	};
883a2e9e	49
e7edd64f BV	50	SR_PRIV struct sr_dev_driver flukedmm_driver_info;
e7edd64f BV	51	static struct sr_dev_driver *di = &flukedmm_driver_info;
883a2e9e	52
4f958423 BV	53	static const struct flukedmm_profile supported_flukedmm[] = {
4f958423 BV	54	{ FLUKE_187, "187" },
acd29acc	55	{ FLUKE_287, "287" },
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
	85	static int hw_init(void)
	86	{
	87	struct drv_context *drvc;
	88
	89	if (!(drvc = g_try_malloc0(sizeof(struct drv_context)))) {
4f958423	90	sr_err("fluke-dmm: driver context malloc failed.");
883a2e9e BV	91	return SR_ERR;
	92	}
	93
883a2e9e BV	94	di->priv = drvc;
	95
	96	return SR_OK;
	97	}
	98
4f958423 BV	99	static int serial_readline(int fd, char *buf, int buflen, uint64_t timeout_ms)
	100	{
	101	uint64_t start;
	102	int maxlen, len;
	103
	104	timeout_ms *= 1000;
	105	start = g_get_monotonic_time();
	106
	107	maxlen = *buflen;
	108	*buflen = len = 0;
	109	while(1) {
	110	len = maxlen - *buflen - 1;
	111	if (len < 1)
	112	break;
fb480d57	113	len = serial_read(fd, buf + buflen, 1);
4f958423 BV	114	if (len > 0) {
	115	*buflen += len;
	116	(buf + *buflen) = '\0';
f46a36ad	117	if (buflen > 0 && (buf + buflen - 1) == '\r') {
fb480d57 BV	118	/* Strip LF and terminate. */
fb480d57 BV	119	(buf + --*buflen) = '\0';
4f958423	120	break;
fb480d57	121	}
4f958423 BV	122	}
	123	if (g_get_monotonic_time() - start > timeout_ms)
	124	/* Timeout */
	125	break;
	126	g_usleep(2000);
	127	}
fb480d57	128	sr_dbg("fluke-dmm: received %d: '%s'", buflen, buf);
4f958423 BV	129
	130	return SR_OK;
	131	}
	132
41298320	133	static GSList fluke_scan(const char conn, const char *serialcomm)
883a2e9e	134	{
4f958423	135	struct sr_dev_inst *sdi;
883a2e9e	136	struct drv_context *drvc;
4f958423	137	struct dev_context *devc;
4f958423	138	struct sr_probe *probe;
41298320 BV	139	GSList *devices;
41298320 BV	140	int fd, retry, len, i, s;
fb480d57	141	char buf[128], b, *tokens;
883a2e9e	142
4f958423 BV	143	if ((fd = serial_open(conn, O_RDWR\|O_NONBLOCK)) == -1) {
	144	sr_err("fluke-dmm: unable to open %s: %s", conn, strerror(errno));
	145	return NULL;
	146	}
4f958423	147	if (serial_set_paramstr(fd, serialcomm) != SR_OK) {
41298320	148	sr_err("fluke-dmm: unable to set serial parameters");
4f958423 BV	149	return NULL;
	150	}
	151
41298320	152	drvc = di->priv;
fb480d57 BV	153	b = buf;
fb480d57 BV	154	retry = 0;
41298320	155	devices = NULL;
fb480d57 BV	156	/* We'll try the discovery sequence three times in case the device
	157	* is not in an idle state when we send ID. */
	158	while (!devices && retry < 3) {
	159	retry++;
	160	serial_flush(fd);
	161	if (serial_write(fd, "ID\r", 3) == -1) {
	162	sr_err("fluke-dmm: unable to send ID string: %s",
	163	strerror(errno));
	164	continue;
	165	}
4f958423	166
fb480d57 BV	167	/* Response is first a CMD_ACK byte (ASCII '0' for OK,
	168	* or '1' to signify an error. */
	169	len = 128;
	170	serial_readline(fd, &b, &len, 150);
	171	if (len != 1)
	172	continue;
41298320	173	if (buf[0] != '0')
fb480d57	174	continue;
4f958423	175
fb480d57 BV	176	/* If CMD_ACK was OK, ID string follows. */
	177	len = 128;
	178	serial_readline(fd, &b, &len, 150);
	179	if (len < 10)
	180	continue;
	181	tokens = g_strsplit(buf, ",", 3);
	182	if (!strncmp("FLUKE", tokens[0], 5)
	183	&& tokens[1] && tokens[2]) {
	184	for (i = 0; supported_flukedmm[i].model; i++) {
	185	if (strcmp(supported_flukedmm[i].modelname, tokens[0] + 6))
	186	continue;
	187	/* Skip leading spaces in version number. */
	188	for (s = 0; tokens[1][s] == ' '; s++);
	189	if (!(sdi = sr_dev_inst_new(0, SR_ST_INACTIVE, "Fluke",
	190	tokens[0] + 6, tokens[1] + s)))
	191	return NULL;
	192	if (!(devc = g_try_malloc0(sizeof(struct dev_context)))) {
	193	sr_dbg("fluke-dmm: failed to malloc devc");
	194	return NULL;
	195	}
	196	devc->profile = &supported_flukedmm[i];
	197	devc->serial = sr_serial_dev_inst_new(conn, -1);
41298320	198	devc->serialcomm = g_strdup(serialcomm);
fb480d57 BV	199	sdi->priv = devc;
	200	sdi->driver = di;
	201	if (!(probe = sr_probe_new(0, SR_PROBE_ANALOG, TRUE, "P1")))
	202	return NULL;
	203	sdi->probes = g_slist_append(sdi->probes, probe);
	204	drvc->instances = g_slist_append(drvc->instances, sdi);
	205	devices = g_slist_append(devices, sdi);
	206	break;
4f958423	207	}
4f958423	208	}
fb480d57	209	g_strfreev(tokens);
4f958423	210	}
4f958423	211	serial_close(fd);
883a2e9e BV	212
	213	return devices;
	214	}
	215
41298320 BV	216	static GSList hw_scan(GSList options)
41298320 BV	217	{
41298320 BV	218	struct sr_hwopt *opt;
	219	GSList l, devices;
	220	const char conn, serialcomm;
	221
	222	conn = serialcomm = NULL;
	223	for (l = options; l; l = l->next) {
	224	opt = l->data;
	225	switch (opt->hwopt) {
	226	case SR_HWOPT_CONN:
	227	conn = opt->value;
	228	break;
	229	case SR_HWOPT_SERIALCOMM:
	230	serialcomm = opt->value;
	231	break;
	232	}
	233	}
	234	if (!conn)
	235	return NULL;
	236
	237	if (serialcomm) {
	238	/* Use the provided comm specs. */
	239	devices = fluke_scan(conn, serialcomm);
	240	} else {
	241	/* Try 115200, as used on 287/289. */
	242	devices = fluke_scan(conn, "115200/8n1");
	243	if (!devices)
	244	/* Fall back to 9600 for 187/189. */
	245	devices = fluke_scan(conn, "9600/8n1");
	246	}
	247
	248	return devices;
	249	}
	250
883a2e9e BV	251	static GSList *hw_dev_list(void)
	252	{
	253	struct drv_context *drvc;
	254
	255	drvc = di->priv;
	256
	257	return drvc->instances;
	258	}
	259
	260	static int hw_dev_open(struct sr_dev_inst *sdi)
	261	{
41298320	262	struct dev_context *devc;
883a2e9e	263
41298320 BV	264	if (!(devc = sdi->priv)) {
	265	sr_err("fluke-dmm: sdi->priv was NULL.");
	266	return SR_ERR_BUG;
	267	}
	268
	269	devc->serial->fd = serial_open(devc->serial->port, O_RDWR \| O_NONBLOCK);
	270	if (devc->serial->fd == -1) {
	271	sr_err("fluke-dmm: Couldn't open serial port '%s'.",
	272	devc->serial->port);
	273	return SR_ERR;
	274	}
	275	if (serial_set_paramstr(devc->serial->fd, devc->serialcomm) != SR_OK) {
	276	sr_err("fluke-dmm: unable to set serial parameters");
	277	return SR_ERR;
	278	}
	279	sdi->status = SR_ST_ACTIVE;
883a2e9e BV	280
	281	return SR_OK;
	282	}
	283
	284	static int hw_dev_close(struct sr_dev_inst *sdi)
	285	{
d3f8f141	286	struct dev_context *devc;
883a2e9e	287
d3f8f141 BV	288	if (!(devc = sdi->priv)) {
	289	sr_err("fluke-dmm: sdi->priv was NULL.");
	290	return SR_ERR_BUG;
	291	}
	292
	293	if (devc->serial && devc->serial->fd != -1) {
	294	serial_close(devc->serial->fd);
	295	devc->serial->fd = -1;
	296	sdi->status = SR_ST_INACTIVE;
	297	}
883a2e9e BV	298
	299	return SR_OK;
	300	}
	301
	302	static int hw_cleanup(void)
	303	{
	304
	305	clear_instances();
	306
883a2e9e BV	307	return SR_OK;
	308	}
	309
	310	static int hw_info_get(int info_id, const void **data,
	311	const struct sr_dev_inst *sdi)
	312	{
	313
d3f8f141	314	(void)sdi;
883a2e9e BV	315
883a2e9e BV	316	switch (info_id) {
d3f8f141 BV	317	case SR_DI_HWOPTS:
	318	*data = hwopts;
	319	break;
	320	case SR_DI_HWCAPS:
	321	*data = hwcaps;
	322	break;
	323	case SR_DI_NUM_PROBES:
	324	*data = GINT_TO_POINTER(1);
	325	break;
	326	case SR_DI_PROBE_NAMES:
	327	*data = probe_names;
	328	break;
883a2e9e BV	329	default:
	330	return SR_ERR_ARG;
	331	}
	332
	333	return SR_OK;
	334	}
	335
	336	static int hw_dev_config_set(const struct sr_dev_inst *sdi, int hwcap,
	337	const void *value)
	338	{
d3f8f141	339	struct dev_context *devc;
883a2e9e BV	340
	341	if (sdi->status != SR_ST_ACTIVE)
	342	return SR_ERR;
	343
d3f8f141 BV	344	if (!(devc = sdi->priv)) {
	345	sr_err("fluke-dmm: sdi->priv was NULL.");
	346	return SR_ERR_BUG;
	347	}
	348
883a2e9e	349	switch (hwcap) {
d3f8f141 BV	350	case SR_HWCAP_LIMIT_MSEC:
	351	/* TODO: not yet implemented */
	352	if ((const uint64_t )value == 0) {
	353	sr_err("fluke-dmm: LIMIT_MSEC can't be 0.");
	354	return SR_ERR;
	355	}
	356	devc->limit_msec = (const uint64_t )value;
	357	sr_dbg("fluke-dmm: Setting time limit to %" PRIu64 "ms.",
	358	devc->limit_msec);
	359	break;
	360	case SR_HWCAP_LIMIT_SAMPLES:
	361	devc->limit_samples = (const uint64_t )value;
	362	sr_dbg("fluke-dmm: Setting sample limit to %" PRIu64 ".",
	363	devc->limit_samples);
	364	break;
883a2e9e	365	default:
d3f8f141 BV	366	sr_err("fluke-dmm: Unknown capability: %d.", hwcap);
	367	return SR_ERR;
	368	break;
883a2e9e BV	369	}
883a2e9e BV	370
d3f8f141	371	return SR_OK;
883a2e9e BV	372	}
	373
	374	static int hw_dev_acquisition_start(const struct sr_dev_inst *sdi,
	375	void *cb_data)
	376	{
d3f8f141 BV	377	struct sr_datafeed_packet packet;
	378	struct sr_datafeed_header header;
	379	struct sr_datafeed_meta_analog meta;
	380	struct dev_context *devc;
	381
	382	if (!(devc = sdi->priv)) {
	383	sr_err("fluke-dmm: sdi->priv was NULL.");
	384	return SR_ERR_BUG;
	385	}
	386
	387	sr_dbg("fluke-dmm: Starting acquisition.");
	388
	389	devc->cb_data = cb_data;
	390
	391	/* Send header packet to the session bus. */
	392	sr_dbg("fluke-dmm: Sending SR_DF_HEADER.");
	393	packet.type = SR_DF_HEADER;
	394	packet.payload = (uint8_t *)&header;
	395	header.feed_version = 1;
	396	gettimeofday(&header.starttime, NULL);
	397	sr_session_send(devc->cb_data, &packet);
883a2e9e	398
d3f8f141 BV	399	/* Send metadata about the SR_DF_ANALOG packets to come. */
	400	sr_dbg("fluke-dmm: Sending SR_DF_META_ANALOG.");
	401	packet.type = SR_DF_META_ANALOG;
	402	packet.payload = &meta;
	403	meta.num_probes = 1;
	404	sr_session_send(devc->cb_data, &packet);
	405
	406	/* Poll every 100ms, or whenever some data comes in. */
	407	sr_source_add(devc->serial->fd, G_IO_IN, 100, fluke_receive_data, (void *)sdi);
883a2e9e BV	408
	409	return SR_OK;
	410	}
	411
	412	static int hw_dev_acquisition_stop(const struct sr_dev_inst *sdi,
	413	void *cb_data)
	414	{
d3f8f141 BV	415	struct sr_datafeed_packet packet;
d3f8f141 BV	416	struct dev_context *devc;
883a2e9e BV	417
	418	if (sdi->status != SR_ST_ACTIVE)
	419	return SR_ERR;
	420
d3f8f141 BV	421	if (!(devc = sdi->priv)) {
	422	sr_err("fluke-dmm: sdi->priv was NULL.");
	423	return SR_ERR_BUG;
	424	}
	425
	426	sr_dbg("fluke-dmm: Stopping acquisition.");
	427
	428	sr_source_remove(devc->serial->fd);
	429	hw_dev_close((struct sr_dev_inst *)sdi);
	430
	431	/* Send end packet to the session bus. */
	432	sr_dbg("fluke-dmm: Sending SR_DF_END.");
	433	packet.type = SR_DF_END;
	434	sr_session_send(cb_data, &packet);
883a2e9e BV	435
	436	return SR_OK;
	437	}
	438
e7edd64f	439	SR_PRIV struct sr_dev_driver flukedmm_driver_info = {
883a2e9e BV	440	.name = "fluke-dmm",
	441	.longname = "Fluke 18x/28x series DMMs",
	442	.api_version = 1,
	443	.init = hw_init,
	444	.cleanup = hw_cleanup,
	445	.scan = hw_scan,
	446	.dev_list = hw_dev_list,
	447	.dev_clear = clear_instances,
	448	.dev_open = hw_dev_open,
	449	.dev_close = hw_dev_close,
	450	.info_get = hw_info_get,
	451	.dev_config_set = hw_dev_config_set,
	452	.dev_acquisition_start = hw_dev_acquisition_start,
	453	.dev_acquisition_stop = hw_dev_acquisition_stop,
	454	.priv = NULL,
	455	};