[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 "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", 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("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, 50, fluke_receive_data, (void *)sdi);

	if (serial_write(devc->serial->fd, "QM\r", 3) == -1) {
		sr_err("fluke-dmm: 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(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"
4f958423 BV	23	#include "fluke-dmm.h"
	24	#include <sys/types.h>
	25	#include <sys/stat.h>
	26	#include <fcntl.h>
	27	#include <string.h>
	28	#include <errno.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)))) {
4f958423	89	sr_err("fluke-dmm: driver context malloc failed.");
883a2e9e BV	90	return SR_ERR;
	91	}
	92
883a2e9e BV	93	di->priv = drvc;
	94
	95	return SR_OK;
	96	}
	97
4f958423 BV	98	static int serial_readline(int fd, char *buf, int buflen, uint64_t timeout_ms)
	99	{
	100	uint64_t start;
	101	int maxlen, len;
	102
	103	timeout_ms *= 1000;
	104	start = g_get_monotonic_time();
	105
	106	maxlen = *buflen;
	107	*buflen = len = 0;
	108	while(1) {
	109	len = maxlen - *buflen - 1;
	110	if (len < 1)
	111	break;
fb480d57	112	len = serial_read(fd, buf + buflen, 1);
4f958423 BV	113	if (len > 0) {
	114	*buflen += len;
	115	(buf + *buflen) = '\0';
f46a36ad	116	if (buflen > 0 && (buf + buflen - 1) == '\r') {
fb480d57 BV	117	/* Strip LF and terminate. */
fb480d57 BV	118	(buf + --*buflen) = '\0';
4f958423	119	break;
fb480d57	120	}
4f958423 BV	121	}
	122	if (g_get_monotonic_time() - start > timeout_ms)
	123	/* Timeout */
	124	break;
	125	g_usleep(2000);
	126	}
fb480d57	127	sr_dbg("fluke-dmm: received %d: '%s'", buflen, buf);
4f958423 BV	128
	129	return SR_OK;
	130	}
	131
41298320	132	static GSList fluke_scan(const char conn, const char *serialcomm)
883a2e9e	133	{
4f958423	134	struct sr_dev_inst *sdi;
883a2e9e	135	struct drv_context *drvc;
4f958423	136	struct dev_context *devc;
4f958423	137	struct sr_probe *probe;
41298320 BV	138	GSList *devices;
41298320 BV	139	int fd, retry, len, i, s;
fb480d57	140	char buf[128], b, *tokens;
883a2e9e	141
4f958423 BV	142	if ((fd = serial_open(conn, O_RDWR\|O_NONBLOCK)) == -1) {
	143	sr_err("fluke-dmm: unable to open %s: %s", conn, strerror(errno));
	144	return NULL;
	145	}
4f958423	146	if (serial_set_paramstr(fd, serialcomm) != SR_OK) {
41298320	147	sr_err("fluke-dmm: unable to set serial parameters");
4f958423 BV	148	return NULL;
	149	}
	150
41298320	151	drvc = di->priv;
fb480d57 BV	152	b = buf;
fb480d57 BV	153	retry = 0;
41298320	154	devices = NULL;
fb480d57 BV	155	/* We'll try the discovery sequence three times in case the device
	156	* is not in an idle state when we send ID. */
	157	while (!devices && retry < 3) {
	158	retry++;
	159	serial_flush(fd);
	160	if (serial_write(fd, "ID\r", 3) == -1) {
	161	sr_err("fluke-dmm: unable to send ID string: %s",
	162	strerror(errno));
	163	continue;
	164	}
4f958423	165
fb480d57 BV	166	/* Response is first a CMD_ACK byte (ASCII '0' for OK,
	167	* or '1' to signify an error. */
	168	len = 128;
	169	serial_readline(fd, &b, &len, 150);
	170	if (len != 1)
	171	continue;
41298320	172	if (buf[0] != '0')
fb480d57	173	continue;
4f958423	174
fb480d57 BV	175	/* If CMD_ACK was OK, ID string follows. */
	176	len = 128;
	177	serial_readline(fd, &b, &len, 150);
	178	if (len < 10)
	179	continue;
	180	tokens = g_strsplit(buf, ",", 3);
	181	if (!strncmp("FLUKE", tokens[0], 5)
	182	&& tokens[1] && tokens[2]) {
	183	for (i = 0; supported_flukedmm[i].model; i++) {
	184	if (strcmp(supported_flukedmm[i].modelname, tokens[0] + 6))
	185	continue;
	186	/* Skip leading spaces in version number. */
	187	for (s = 0; tokens[1][s] == ' '; s++);
	188	if (!(sdi = sr_dev_inst_new(0, SR_ST_INACTIVE, "Fluke",
	189	tokens[0] + 6, tokens[1] + s)))
	190	return NULL;
	191	if (!(devc = g_try_malloc0(sizeof(struct dev_context)))) {
	192	sr_dbg("fluke-dmm: failed to malloc devc");
	193	return NULL;
	194	}
	195	devc->profile = &supported_flukedmm[i];
	196	devc->serial = sr_serial_dev_inst_new(conn, -1);
41298320	197	devc->serialcomm = g_strdup(serialcomm);
fb480d57 BV	198	sdi->priv = devc;
	199	sdi->driver = di;
	200	if (!(probe = sr_probe_new(0, SR_PROBE_ANALOG, TRUE, "P1")))
	201	return NULL;
	202	sdi->probes = g_slist_append(sdi->probes, probe);
	203	drvc->instances = g_slist_append(drvc->instances, sdi);
	204	devices = g_slist_append(devices, sdi);
	205	break;
4f958423	206	}
4f958423	207	}
fb480d57	208	g_strfreev(tokens);
4f958423	209	}
4f958423	210	serial_close(fd);
883a2e9e BV	211
	212	return devices;
	213	}
	214
41298320 BV	215	static GSList hw_scan(GSList options)
41298320 BV	216	{
41298320 BV	217	struct sr_hwopt *opt;
	218	GSList l, devices;
	219	const char conn, serialcomm;
	220
	221	conn = serialcomm = NULL;
	222	for (l = options; l; l = l->next) {
	223	opt = l->data;
	224	switch (opt->hwopt) {
	225	case SR_HWOPT_CONN:
	226	conn = opt->value;
	227	break;
	228	case SR_HWOPT_SERIALCOMM:
	229	serialcomm = opt->value;
	230	break;
	231	}
	232	}
	233	if (!conn)
	234	return NULL;
	235
	236	if (serialcomm) {
	237	/* Use the provided comm specs. */
	238	devices = fluke_scan(conn, serialcomm);
	239	} else {
	240	/* Try 115200, as used on 287/289. */
	241	devices = fluke_scan(conn, "115200/8n1");
	242	if (!devices)
	243	/* Fall back to 9600 for 187/189. */
	244	devices = fluke_scan(conn, "9600/8n1");
	245	}
	246
	247	return devices;
	248	}
	249
883a2e9e BV	250	static GSList *hw_dev_list(void)
	251	{
	252	struct drv_context *drvc;
	253
	254	drvc = di->priv;
	255
	256	return drvc->instances;
	257	}
	258
	259	static int hw_dev_open(struct sr_dev_inst *sdi)
	260	{
41298320	261	struct dev_context *devc;
883a2e9e	262
41298320 BV	263	if (!(devc = sdi->priv)) {
	264	sr_err("fluke-dmm: sdi->priv was NULL.");
	265	return SR_ERR_BUG;
	266	}
	267
	268	devc->serial->fd = serial_open(devc->serial->port, O_RDWR \| O_NONBLOCK);
	269	if (devc->serial->fd == -1) {
	270	sr_err("fluke-dmm: Couldn't open serial port '%s'.",
	271	devc->serial->port);
	272	return SR_ERR;
	273	}
	274	if (serial_set_paramstr(devc->serial->fd, devc->serialcomm) != SR_OK) {
	275	sr_err("fluke-dmm: unable to set serial parameters");
	276	return SR_ERR;
	277	}
	278	sdi->status = SR_ST_ACTIVE;
883a2e9e BV	279
	280	return SR_OK;
	281	}
	282
	283	static int hw_dev_close(struct sr_dev_inst *sdi)
	284	{
d3f8f141	285	struct dev_context *devc;
883a2e9e	286
d3f8f141 BV	287	if (!(devc = sdi->priv)) {
	288	sr_err("fluke-dmm: sdi->priv was NULL.");
	289	return SR_ERR_BUG;
	290	}
	291
	292	if (devc->serial && devc->serial->fd != -1) {
	293	serial_close(devc->serial->fd);
	294	devc->serial->fd = -1;
	295	sdi->status = SR_ST_INACTIVE;
	296	}
883a2e9e BV	297
	298	return SR_OK;
	299	}
	300
	301	static int hw_cleanup(void)
	302	{
	303
	304	clear_instances();
	305
883a2e9e BV	306	return SR_OK;
	307	}
	308
	309	static int hw_info_get(int info_id, const void **data,
	310	const struct sr_dev_inst *sdi)
	311	{
	312
d3f8f141	313	(void)sdi;
883a2e9e BV	314
883a2e9e BV	315	switch (info_id) {
d3f8f141 BV	316	case SR_DI_HWOPTS:
	317	*data = hwopts;
	318	break;
	319	case SR_DI_HWCAPS:
	320	*data = hwcaps;
	321	break;
	322	case SR_DI_NUM_PROBES:
	323	*data = GINT_TO_POINTER(1);
	324	break;
	325	case SR_DI_PROBE_NAMES:
	326	*data = probe_names;
	327	break;
883a2e9e BV	328	default:
	329	return SR_ERR_ARG;
	330	}
	331
	332	return SR_OK;
	333	}
	334
	335	static int hw_dev_config_set(const struct sr_dev_inst *sdi, int hwcap,
	336	const void *value)
	337	{
d3f8f141	338	struct dev_context *devc;
883a2e9e BV	339
	340	if (sdi->status != SR_ST_ACTIVE)
	341	return SR_ERR;
	342
d3f8f141 BV	343	if (!(devc = sdi->priv)) {
	344	sr_err("fluke-dmm: sdi->priv was NULL.");
	345	return SR_ERR_BUG;
	346	}
	347
883a2e9e	348	switch (hwcap) {
d3f8f141 BV	349	case SR_HWCAP_LIMIT_MSEC:
	350	/* TODO: not yet implemented */
	351	if ((const uint64_t )value == 0) {
	352	sr_err("fluke-dmm: LIMIT_MSEC can't be 0.");
	353	return SR_ERR;
	354	}
	355	devc->limit_msec = (const uint64_t )value;
	356	sr_dbg("fluke-dmm: Setting time limit to %" PRIu64 "ms.",
	357	devc->limit_msec);
	358	break;
	359	case SR_HWCAP_LIMIT_SAMPLES:
	360	devc->limit_samples = (const uint64_t )value;
	361	sr_dbg("fluke-dmm: Setting sample limit to %" PRIu64 ".",
	362	devc->limit_samples);
	363	break;
883a2e9e	364	default:
d3f8f141 BV	365	sr_err("fluke-dmm: Unknown capability: %d.", hwcap);
	366	return SR_ERR;
	367	break;
883a2e9e BV	368	}
883a2e9e BV	369
d3f8f141	370	return SR_OK;
883a2e9e BV	371	}
	372
	373	static int hw_dev_acquisition_start(const struct sr_dev_inst *sdi,
	374	void *cb_data)
	375	{
d3f8f141 BV	376	struct sr_datafeed_packet packet;
	377	struct sr_datafeed_header header;
	378	struct sr_datafeed_meta_analog meta;
	379	struct dev_context *devc;
	380
	381	if (!(devc = sdi->priv)) {
	382	sr_err("fluke-dmm: sdi->priv was NULL.");
	383	return SR_ERR_BUG;
	384	}
	385
	386	sr_dbg("fluke-dmm: Starting acquisition.");
	387
	388	devc->cb_data = cb_data;
	389
	390	/* Send header packet to the session bus. */
	391	sr_dbg("fluke-dmm: Sending SR_DF_HEADER.");
	392	packet.type = SR_DF_HEADER;
	393	packet.payload = (uint8_t *)&header;
	394	header.feed_version = 1;
	395	gettimeofday(&header.starttime, NULL);
	396	sr_session_send(devc->cb_data, &packet);
883a2e9e	397
d3f8f141 BV	398	/* Send metadata about the SR_DF_ANALOG packets to come. */
	399	sr_dbg("fluke-dmm: Sending SR_DF_META_ANALOG.");
	400	packet.type = SR_DF_META_ANALOG;
	401	packet.payload = &meta;
	402	meta.num_probes = 1;
	403	sr_session_send(devc->cb_data, &packet);
	404
	405	/* Poll every 100ms, or whenever some data comes in. */
d38d2ef0 BV	406	sr_source_add(devc->serial->fd, G_IO_IN, 50, fluke_receive_data, (void *)sdi);
	407
	408	if (serial_write(devc->serial->fd, "QM\r", 3) == -1) {
	409	sr_err("fluke-dmm: unable to send QM: %s", strerror(errno));
	410	return SR_ERR;
	411	}
	412	devc->cmd_sent_at = g_get_monotonic_time() / 1000;
	413	devc->expect_response = TRUE;
883a2e9e BV	414
	415	return SR_OK;
	416	}
	417
	418	static int hw_dev_acquisition_stop(const struct sr_dev_inst *sdi,
	419	void *cb_data)
	420	{
d3f8f141 BV	421	struct sr_datafeed_packet packet;
d3f8f141 BV	422	struct dev_context *devc;
883a2e9e BV	423
	424	if (sdi->status != SR_ST_ACTIVE)
	425	return SR_ERR;
	426
d3f8f141 BV	427	if (!(devc = sdi->priv)) {
	428	sr_err("fluke-dmm: sdi->priv was NULL.");
	429	return SR_ERR_BUG;
	430	}
	431
	432	sr_dbg("fluke-dmm: Stopping acquisition.");
	433
	434	sr_source_remove(devc->serial->fd);
	435	hw_dev_close((struct sr_dev_inst *)sdi);
	436
	437	/* Send end packet to the session bus. */
	438	sr_dbg("fluke-dmm: Sending SR_DF_END.");
	439	packet.type = SR_DF_END;
	440	sr_session_send(cb_data, &packet);
883a2e9e BV	441
	442	return SR_OK;
	443	}
	444
e7edd64f	445	SR_PRIV struct sr_dev_driver flukedmm_driver_info = {
883a2e9e BV	446	.name = "fluke-dmm",
	447	.longname = "Fluke 18x/28x series DMMs",
	448	.api_version = 1,
	449	.init = hw_init,
	450	.cleanup = hw_cleanup,
	451	.scan = hw_scan,
	452	.dev_list = hw_dev_list,
	453	.dev_clear = clear_instances,
	454	.dev_open = hw_dev_open,
	455	.dev_close = hw_dev_close,
	456	.info_get = hw_info_get,
	457	.dev_config_set = hw_dev_config_set,
	458	.dev_acquisition_start = hw_dev_acquisition_start,
	459	.dev_acquisition_stop = hw_dev_acquisition_stop,
	460	.priv = NULL,
	461	};