[libsigrok.git] / hardware / agilent-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 "agilent-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,
};

extern const struct agdmm_job agdmm_jobs_u123x[];
extern const struct agdmm_recv agdmm_recvs_u123x[];
extern const struct agdmm_job agdmm_jobs_u125x[];
extern const struct agdmm_recv agdmm_recvs_u125x[];

/* This works on all the Agilent U12xxA series, although the
 * U127xA can apparently also run at 19200/8n1. */
#define SERIALCOMM "9600/8n1"

static const struct agdmm_profile supported_agdmm[] = {
	{ AGILENT_U1231A, "U1231A", agdmm_jobs_u123x, agdmm_recvs_u123x },
	{ AGILENT_U1232A, "U1232A", agdmm_jobs_u123x, agdmm_recvs_u123x },
	{ AGILENT_U1233A, "U1233A", agdmm_jobs_u123x, agdmm_recvs_u123x },
	{ AGILENT_U1251A, "U1251A", agdmm_jobs_u125x, agdmm_recvs_u125x },
	{ AGILENT_U1252A, "U1252A", agdmm_jobs_u125x, agdmm_recvs_u125x },
	{ AGILENT_U1253A, "U1253A", agdmm_jobs_u125x, agdmm_recvs_u125x },
	{ 0, NULL, NULL, NULL }
};

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

/* 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;
}

/* TODO: Merge into serial_readline() from serial.c. */
static int serial_readline2(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, len);
		if (len > 0) {
			*buflen += len;
			*(*buf + *buflen) = '\0';
			if (*buflen > 0 && *(*buf + *buflen - 1) == '\n')
				/* End of line */
				break;
		}
		if (g_get_monotonic_time() - start > timeout_ms)
			/* Timeout */
			break;
		g_usleep(2000);
	}

	/* Strip CRLF */
	while (*buflen) {
		if (*(*buf + *buflen - 1) == '\r' || *(*buf + *buflen - 1) == '\n')
			*(*buf + --*buflen) = '\0';
		else
			break;
	}
	if (*buflen)
		sr_dbg("Received '%s'.", *buf);

	return SR_OK;
}

static GSList *hw_scan(GSList *options)
{
	struct sr_dev_inst *sdi;
	struct drv_context *drvc;
	struct dev_context *devc;
	struct sr_hwopt *opt;
	struct sr_probe *probe;
	GSList *l, *devices;
	int len, fd, i;
	const char *conn, *serialcomm;
	char *buf, **tokens;

	drvc = di->priv;
	drvc->instances = NULL;

	devices = NULL;
	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 ((fd = serial_open(conn, O_RDWR|O_NONBLOCK)) == -1) {
		sr_err("Unable to open %s: %s.", conn, strerror(errno));
		return NULL;
	}

	if (!serialcomm)
		serialcomm = SERIALCOMM;
	if (serial_set_paramstr(fd, serialcomm) != SR_OK) {
		sr_err("Unable to set serial parameters: %s.",
		       strerror(errno));
		return NULL;
	}

	serial_flush(fd);
	if (serial_write(fd, "*IDN?\r\n", 7) == -1) {
		sr_err("Unable to send identification string: %s.",
		       strerror(errno));
		return NULL;
	}

	len = 128;
	if (!(buf = g_try_malloc(len))) {
		sr_err("Serial buffer malloc failed.");
		return NULL;
	}
	serial_readline2(fd, &buf, &len, 150);
	if (!len)
		return NULL;

	tokens = g_strsplit(buf, ",", 4);
	if (!strcmp("Agilent Technologies", tokens[0])
			&& tokens[2] && tokens[3]) {
		for (i = 0; supported_agdmm[i].model; i++) {
			if (strcmp(supported_agdmm[i].modelname, tokens[1]))
				continue;
			if (!(sdi = sr_dev_inst_new(0, SR_ST_INACTIVE, tokens[0],
					tokens[1], tokens[3])))
				return NULL;
			if (!(devc = g_try_malloc0(sizeof(struct dev_context)))) {
				sr_err("Device context malloc failed.");
				return NULL;
			}
			devc->profile = &supported_agdmm[i];
			devc->serial = sr_serial_dev_inst_new(conn, -1);
			devc->cur_mq = -1;
			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);
	g_free(buf);

	serial_close(fd);

	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;
	}

	devc->serial->fd = serial_open(devc->serial->port, O_RDWR | O_NONBLOCK);
	if (devc->serial->fd == -1) {
		sr_err("Couldn't open serial port '%s'.",
		       devc->serial->port);
		return SR_ERR;
	}
	serial_set_paramstr(devc->serial->fd, SERIALCOMM);
	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->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("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, 100, agdmm_receive_data, (void *)sdi);

	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 agdmm_driver_info = {
	.name = "agilent-dmm",
	.longname = "Agilent U12xx 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
e93cdf42 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>
e93cdf42 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 "agilent-dmm.h"
e93cdf42 BV	29
	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	};
	48
8c0152f2 BV	49	extern const struct agdmm_job agdmm_jobs_u123x[];
	50	extern const struct agdmm_recv agdmm_recvs_u123x[];
	51	extern const struct agdmm_job agdmm_jobs_u125x[];
	52	extern const struct agdmm_recv agdmm_recvs_u125x[];
e93cdf42	53
74ac7d7f BV	54	/* This works on all the Agilent U12xxA series, although the
	55	* U127xA can apparently also run at 19200/8n1. */
	56	#define SERIALCOMM "9600/8n1"
	57
e93cdf42	58	static const struct agdmm_profile supported_agdmm[] = {
74ac7d7f BV	59	{ AGILENT_U1231A, "U1231A", agdmm_jobs_u123x, agdmm_recvs_u123x },
	60	{ AGILENT_U1232A, "U1232A", agdmm_jobs_u123x, agdmm_recvs_u123x },
	61	{ AGILENT_U1233A, "U1233A", agdmm_jobs_u123x, agdmm_recvs_u123x },
	62	{ AGILENT_U1251A, "U1251A", agdmm_jobs_u125x, agdmm_recvs_u125x },
	63	{ AGILENT_U1252A, "U1252A", agdmm_jobs_u125x, agdmm_recvs_u125x },
	64	{ AGILENT_U1253A, "U1253A", agdmm_jobs_u125x, agdmm_recvs_u125x },
	65	{ 0, NULL, NULL, NULL }
e93cdf42 BV	66	};
	67
	68	SR_PRIV struct sr_dev_driver agdmm_driver_info;
	69	static struct sr_dev_driver *di = &agdmm_driver_info;
	70
	71	/* Properly close and free all devices. */
	72	static int clear_instances(void)
	73	{
	74	struct sr_dev_inst *sdi;
	75	struct drv_context *drvc;
	76	struct dev_context *devc;
	77	GSList *l;
	78
	79	if (!(drvc = di->priv))
	80	return SR_OK;
	81
	82	drvc = di->priv;
	83	for (l = drvc->instances; l; l = l->next) {
	84	if (!(sdi = l->data))
	85	continue;
	86	if (!(devc = sdi->priv))
	87	continue;
	88	sr_serial_dev_inst_free(devc->serial);
	89	sr_dev_inst_free(sdi);
	90	}
	91	g_slist_free(drvc->instances);
	92	drvc->instances = NULL;
	93
	94	return SR_OK;
	95	}
	96
	97	static int hw_init(void)
	98	{
	99	struct drv_context *drvc;
	100
	101	if (!(drvc = g_try_malloc0(sizeof(struct drv_context)))) {
38d326e8	102	sr_err("Driver context malloc failed.");
886a52b6	103	return SR_ERR_MALLOC;
e93cdf42 BV	104	}
	105
	106	di->priv = drvc;
	107
	108	return SR_OK;
	109	}
	110
6f22a8ef UH	111	/* TODO: Merge into serial_readline() from serial.c. */
6f22a8ef UH	112	static int serial_readline2(int fd, char *buf, int buflen, uint64_t timeout_ms)
e93cdf42 BV	113	{
	114	uint64_t start;
	115	int maxlen, len;
	116
	117	timeout_ms *= 1000;
	118	start = g_get_monotonic_time();
	119
	120	maxlen = *buflen;
	121	*buflen = len = 0;
	122	while(1) {
	123	len = maxlen - *buflen - 1;
	124	if (len < 1)
	125	break;
	126	len = serial_read(fd, buf + buflen, len);
	127	if (len > 0) {
	128	*buflen += len;
	129	(buf + *buflen) = '\0';
	130	if (buflen > 0 && (buf + buflen - 1) == '\n')
	131	/* End of line */
	132	break;
	133	}
	134	if (g_get_monotonic_time() - start > timeout_ms)
	135	/* Timeout */
	136	break;
	137	g_usleep(2000);
	138	}
	139
	140	/* Strip CRLF */
	141	while (*buflen) {
	142	if ((buf + buflen - 1) == '\r' \|\| (buf + buflen - 1) == '\n')
	143	(buf + --*buflen) = '\0';
	144	else
	145	break;
	146	}
	147	if (*buflen)
38d326e8	148	sr_dbg("Received '%s'.", *buf);
e93cdf42 BV	149
	150	return SR_OK;
	151	}
	152
	153	static GSList hw_scan(GSList options)
	154	{
	155	struct sr_dev_inst *sdi;
	156	struct drv_context *drvc;
	157	struct dev_context *devc;
	158	struct sr_hwopt *opt;
	159	struct sr_probe *probe;
	160	GSList l, devices;
	161	int len, fd, i;
	162	const char conn, serialcomm;
	163	char buf, *tokens;
	164
	165	drvc = di->priv;
	166	drvc->instances = NULL;
	167
	168	devices = NULL;
	169	conn = serialcomm = NULL;
	170	for (l = options; l; l = l->next) {
	171	opt = l->data;
	172	switch (opt->hwopt) {
	173	case SR_HWOPT_CONN:
	174	conn = opt->value;
	175	break;
	176	case SR_HWOPT_SERIALCOMM:
	177	serialcomm = opt->value;
	178	break;
	179	}
	180	}
74ac7d7f	181	if (!conn)
e93cdf42	182	return NULL;
e93cdf42 BV	183
e93cdf42 BV	184	if ((fd = serial_open(conn, O_RDWR\|O_NONBLOCK)) == -1) {
38d326e8	185	sr_err("Unable to open %s: %s.", conn, strerror(errno));
e93cdf42 BV	186	return NULL;
	187	}
	188
74ac7d7f BV	189	if (!serialcomm)
74ac7d7f BV	190	serialcomm = SERIALCOMM;
e93cdf42	191	if (serial_set_paramstr(fd, serialcomm) != SR_OK) {
38d326e8 UH	192	sr_err("Unable to set serial parameters: %s.",
38d326e8 UH	193	strerror(errno));
e93cdf42 BV	194	return NULL;
	195	}
	196
	197	serial_flush(fd);
	198	if (serial_write(fd, "*IDN?\r\n", 7) == -1) {
38d326e8 UH	199	sr_err("Unable to send identification string: %s.",
38d326e8 UH	200	strerror(errno));
e93cdf42 BV	201	return NULL;
	202	}
	203
	204	len = 128;
886a52b6 UH	205	if (!(buf = g_try_malloc(len))) {
	206	sr_err("Serial buffer malloc failed.");
	207	return NULL;
	208	}
6f22a8ef	209	serial_readline2(fd, &buf, &len, 150);
e93cdf42 BV	210	if (!len)
	211	return NULL;
	212
	213	tokens = g_strsplit(buf, ",", 4);
	214	if (!strcmp("Agilent Technologies", tokens[0])
	215	&& tokens[2] && tokens[3]) {
	216	for (i = 0; supported_agdmm[i].model; i++) {
	217	if (strcmp(supported_agdmm[i].modelname, tokens[1]))
	218	continue;
	219	if (!(sdi = sr_dev_inst_new(0, SR_ST_INACTIVE, tokens[0],
	220	tokens[1], tokens[3])))
	221	return NULL;
	222	if (!(devc = g_try_malloc0(sizeof(struct dev_context)))) {
886a52b6	223	sr_err("Device context malloc failed.");
e93cdf42 BV	224	return NULL;
	225	}
	226	devc->profile = &supported_agdmm[i];
	227	devc->serial = sr_serial_dev_inst_new(conn, -1);
	228	devc->cur_mq = -1;
	229	sdi->priv = devc;
	230	sdi->driver = di;
	231	if (!(probe = sr_probe_new(0, SR_PROBE_ANALOG, TRUE, "P1")))
	232	return NULL;
	233	sdi->probes = g_slist_append(sdi->probes, probe);
	234	drvc->instances = g_slist_append(drvc->instances, sdi);
	235	devices = g_slist_append(devices, sdi);
	236	break;
	237	}
	238	}
	239	g_strfreev(tokens);
	240	g_free(buf);
	241
	242	serial_close(fd);
	243
	244	return devices;
	245	}
	246
	247	static GSList *hw_dev_list(void)
	248	{
	249	struct drv_context *drvc;
	250
	251	drvc = di->priv;
	252
	253	return drvc->instances;
	254	}
	255
	256	static int hw_dev_open(struct sr_dev_inst *sdi)
	257	{
	258	struct dev_context *devc;
	259
	260	if (!(devc = sdi->priv)) {
38d326e8	261	sr_err("sdi->priv was NULL.");
e93cdf42 BV	262	return SR_ERR_BUG;
	263	}
	264
	265	devc->serial->fd = serial_open(devc->serial->port, O_RDWR \| O_NONBLOCK);
	266	if (devc->serial->fd == -1) {
38d326e8	267	sr_err("Couldn't open serial port '%s'.",
e93cdf42 BV	268	devc->serial->port);
	269	return SR_ERR;
	270	}
74ac7d7f	271	serial_set_paramstr(devc->serial->fd, SERIALCOMM);
e93cdf42 BV	272	sdi->status = SR_ST_ACTIVE;
	273
	274	return SR_OK;
	275	}
	276
	277	static int hw_dev_close(struct sr_dev_inst *sdi)
	278	{
	279	struct dev_context *devc;
	280
	281	if (!(devc = sdi->priv)) {
38d326e8	282	sr_err("sdi->priv was NULL.");
e93cdf42 BV	283	return SR_ERR_BUG;
	284	}
	285
	286	if (devc->serial && devc->serial->fd != -1) {
	287	serial_close(devc->serial->fd);
	288	devc->serial->fd = -1;
	289	sdi->status = SR_ST_INACTIVE;
	290	}
	291
	292	return SR_OK;
	293	}
	294
	295	static int hw_cleanup(void)
	296	{
	297
	298	clear_instances();
	299
	300	return SR_OK;
	301	}
	302
	303	static int hw_info_get(int info_id, const void **data,
	304	const struct sr_dev_inst *sdi)
	305	{
	306
	307	(void)sdi;
	308
	309	switch (info_id) {
	310	case SR_DI_HWOPTS:
	311	*data = hwopts;
	312	break;
	313	case SR_DI_HWCAPS:
	314	*data = hwcaps;
	315	break;
	316	case SR_DI_NUM_PROBES:
	317	*data = GINT_TO_POINTER(1);
	318	break;
	319	case SR_DI_PROBE_NAMES:
	320	*data = probe_names;
	321	break;
	322	default:
	323	return SR_ERR_ARG;
	324	}
	325
	326	return SR_OK;
	327	}
	328
	329	static int hw_dev_config_set(const struct sr_dev_inst *sdi, int hwcap,
	330	const void *value)
	331	{
	332	struct dev_context *devc;
	333
	334	if (sdi->status != SR_ST_ACTIVE)
	335	return SR_ERR;
	336
	337	if (!(devc = sdi->priv)) {
38d326e8	338	sr_err("sdi->priv was NULL.");
e93cdf42 BV	339	return SR_ERR_BUG;
	340	}
	341
	342	switch (hwcap) {
	343	case SR_HWCAP_LIMIT_MSEC:
	344	/* TODO: not yet implemented */
	345	if ((const uint64_t )value == 0) {
38d326e8	346	sr_err("LIMIT_MSEC can't be 0.");
e93cdf42 BV	347	return SR_ERR;
	348	}
	349	devc->limit_msec = (const uint64_t )value;
38d326e8	350	sr_dbg("Setting time limit to %" PRIu64 "ms.",
e93cdf42 BV	351	devc->limit_msec);
	352	break;
	353	case SR_HWCAP_LIMIT_SAMPLES:
	354	devc->limit_samples = (const uint64_t )value;
38d326e8	355	sr_dbg("Setting sample limit to %" PRIu64 ".",
e93cdf42 BV	356	devc->limit_samples);
	357	break;
	358	default:
38d326e8	359	sr_err("Unknown capability: %d.", hwcap);
e93cdf42 BV	360	return SR_ERR;
	361	break;
	362	}
	363
	364	return SR_OK;
	365	}
	366
	367	static int hw_dev_acquisition_start(const struct sr_dev_inst *sdi,
	368	void *cb_data)
	369	{
	370	struct sr_datafeed_packet packet;
	371	struct sr_datafeed_header header;
	372	struct sr_datafeed_meta_analog meta;
	373	struct dev_context *devc;
	374
	375	if (!(devc = sdi->priv)) {
38d326e8	376	sr_err("sdi->priv was NULL.");
e93cdf42 BV	377	return SR_ERR_BUG;
	378	}
	379
38d326e8	380	sr_dbg("Starting acquisition.");
e93cdf42 BV	381
	382	devc->cb_data = cb_data;
	383
	384	/* Send header packet to the session bus. */
38d326e8	385	sr_dbg("Sending SR_DF_HEADER.");
e93cdf42 BV	386	packet.type = SR_DF_HEADER;
	387	packet.payload = (uint8_t *)&header;
	388	header.feed_version = 1;
	389	gettimeofday(&header.starttime, NULL);
	390	sr_session_send(devc->cb_data, &packet);
	391
	392	/* Send metadata about the SR_DF_ANALOG packets to come. */
38d326e8	393	sr_dbg("Sending SR_DF_META_ANALOG.");
e93cdf42 BV	394	packet.type = SR_DF_META_ANALOG;
	395	packet.payload = &meta;
	396	meta.num_probes = 1;
	397	sr_session_send(devc->cb_data, &packet);
	398
	399	/* Poll every 100ms, or whenever some data comes in. */
	400	sr_source_add(devc->serial->fd, G_IO_IN, 100, agdmm_receive_data, (void *)sdi);
	401
	402	return SR_OK;
	403	}
	404
69b07d14	405	static int hw_dev_acquisition_stop(struct sr_dev_inst sdi, void cb_data)
e93cdf42 BV	406	{
	407	struct sr_datafeed_packet packet;
	408	struct dev_context *devc;
	409
	410	if (sdi->status != SR_ST_ACTIVE)
	411	return SR_ERR;
	412
	413	if (!(devc = sdi->priv)) {
38d326e8	414	sr_err("sdi->priv was NULL.");
e93cdf42 BV	415	return SR_ERR_BUG;
	416	}
	417
38d326e8	418	sr_dbg("Stopping acquisition.");
e93cdf42 BV	419
	420	sr_source_remove(devc->serial->fd);
	421	hw_dev_close((struct sr_dev_inst *)sdi);
	422
	423	/* Send end packet to the session bus. */
38d326e8	424	sr_dbg("Sending SR_DF_END.");
e93cdf42 BV	425	packet.type = SR_DF_END;
	426	sr_session_send(cb_data, &packet);
	427
	428
	429	return SR_OK;
	430	}
	431
	432	SR_PRIV struct sr_dev_driver agdmm_driver_info = {
	433	.name = "agilent-dmm",
	434	.longname = "Agilent U12xx series DMMs",
	435	.api_version = 1,
	436	.init = hw_init,
	437	.cleanup = hw_cleanup,
	438	.scan = hw_scan,
	439	.dev_list = hw_dev_list,
	440	.dev_clear = clear_instances,
	441	.dev_open = hw_dev_open,
	442	.dev_close = hw_dev_close,
	443	.info_get = hw_info_get,
	444	.dev_config_set = hw_dev_config_set,
	445	.dev_acquisition_start = hw_dev_acquisition_start,
	446	.dev_acquisition_stop = hw_dev_acquisition_stop,
	447	.priv = NULL,
	448	};