[libsigrok.git] / hardware / agilent-dmm / sched.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 "agilent-dmm.h"
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <math.h>


static void dispatch(const struct sr_dev_inst *sdi)
{
	struct dev_context *devc;
	const struct agdmm_job *jobs;
	int64_t now;
	int i;

	devc = sdi->priv;
	jobs = devc->profile->jobs;
	now = g_get_monotonic_time() / 1000;
	for (i = 0; (&jobs[i])->interval; i++) {
		if (now - devc->jobqueue[i] > (&jobs[i])->interval) {
			sr_spew("agilent-dmm: running job %d", i);
			(&jobs[i])->send(sdi);
			devc->jobqueue[i] = now;
		}
	}

}

static void receive_line(const struct sr_dev_inst *sdi)
{
	struct dev_context *devc;
	const struct agdmm_recv *recvs, *recv;
	GRegex *reg;
	GMatchInfo *match;
	int i;

	devc = sdi->priv;

	/* Strip CRLF */
	while (devc->buflen) {
		if (*(devc->buf + devc->buflen - 1) == '\r'
				|| *(devc->buf + devc->buflen - 1) == '\n')
			*(devc->buf + --devc->buflen) = '\0';
		else
			break;
	}
	sr_spew("agilent-dmm: received '%s'", devc->buf);

	recv = NULL;
	recvs = devc->profile->recvs;
	for (i = 0; (&recvs[i])->recv_regex; i++) {
		reg = g_regex_new((&recvs[i])->recv_regex, 0, 0, NULL);
		if (g_regex_match(reg, (char *)devc->buf, 0, &match)) {
			recv = &recvs[i];
			break;
		}
		g_match_info_unref(match);
		g_regex_unref(reg);
	}
	if (recv) {
		recv->recv(sdi, match);
		g_match_info_unref(match);
		g_regex_unref(reg);
	} else
		sr_dbg("agilent-dmm: unknown line '%s'", devc->buf);

	/* Done with this. */
	devc->buflen = 0;

}

SR_PRIV int agdmm_receive_data(int fd, int revents, void *cb_data)
{
	const struct sr_dev_inst *sdi;
	struct dev_context *devc;
	int len;

	if (!(sdi = cb_data))
		return TRUE;

	if (!(devc = sdi->priv))
		return TRUE;

	if (revents == G_IO_IN) {
		/* Serial data arrived. */
		while(AGDMM_BUFSIZE - devc->buflen - 1 > 0) {
			len = serial_read(fd, devc->buf + devc->buflen, 1);
			if (len < 1)
				break;
			devc->buflen += len;
			*(devc->buf + devc->buflen) = '\0';
			if (*(devc->buf + devc->buflen - 1) == '\n') {
				/* End of line */
				receive_line(sdi);
				break;
			}
		}
	}

	dispatch(sdi);

	if (devc->num_samples >= devc->limit_samples)
		sdi->driver->dev_acquisition_stop(sdi, cb_data);

	return TRUE;
}

static int agdmm_send(const struct sr_dev_inst *sdi, const char *cmd)
{
	struct dev_context *devc;
	char buf[32];

	devc = sdi->priv;
	sr_spew("agilent-dmm: sending '%s'", cmd);
	strncpy(buf, cmd, 28);
	if (!strncmp(buf, "*IDN?", 5))
		strncat(buf, "\r\n", 32);
	else
		strncat(buf, "\n\r\n", 32);
	if (serial_write(devc->serial->fd, buf, strlen(buf)) == -1) {
		sr_err("agilent-dmm: failed to send: %s", strerror(errno));
		return SR_ERR;
	}
	
	return SR_OK;
}

static int send_stat(const struct sr_dev_inst *sdi)
{

	return agdmm_send(sdi, "STAT?");
}

static int recv_stat_u123x(const struct sr_dev_inst *sdi, GMatchInfo *match)
{
	struct dev_context *devc;
	char *s;

	devc = sdi->priv;
	s = g_match_info_fetch(match, 1);
	sr_spew("agilent-dmm: STAT response '%s'", s);

	/* Max, Min or Avg mode -- no way to tell which, so we'll
	 * set both flags to denote it's not a normal measurement. */
	if (s[0] == '1')
		devc->cur_mqflags |= SR_MQFLAG_MAX | SR_MQFLAG_MIN;
	else
		devc->cur_mqflags &= ~(SR_MQFLAG_MAX | SR_MQFLAG_MIN);

	if (s[1] == '1')
		devc->cur_mqflags |= SR_MQFLAG_RELATIVE;
	else
		devc->cur_mqflags &= ~SR_MQFLAG_RELATIVE;

	/* Triggered or auto hold modes. */
	if (s[2] == '1' || s[3] == '1')
		devc->cur_mqflags |= SR_MQFLAG_HOLD;
	else
		devc->cur_mqflags &= ~SR_MQFLAG_HOLD;

	/* Temp/aux mode. */
	if (s[7] == '1')
		devc->mode_tempaux = TRUE;
	else
		devc->mode_tempaux = FALSE;

	/*  Continuity mode. */
	if (s[16] == '1')
		devc->mode_continuity = TRUE;
	else
		devc->mode_continuity = FALSE;

	g_free(s);

	return SR_OK;
}

static int recv_stat_u125x(const struct sr_dev_inst *sdi, GMatchInfo *match)
{
	struct dev_context *devc;
	char *s;

	devc = sdi->priv;
	s = g_match_info_fetch(match, 1);
	sr_spew("agilent-dmm: STAT response '%s'", s);

	/* Peak hold mode. */
	if (s[4] == '1')
		devc->cur_mqflags |= SR_MQFLAG_MAX;
	else
		devc->cur_mqflags &= ~SR_MQFLAG_MAX;

	/* Triggered hold mode. */
	if (s[7] == '1')
		devc->cur_mqflags |= SR_MQFLAG_HOLD;
	else
		devc->cur_mqflags &= ~SR_MQFLAG_HOLD;

	g_free(s);

	return SR_OK;
}

static int send_fetc(const struct sr_dev_inst *sdi)
{

	return agdmm_send(sdi, "FETC?");
}

static int recv_fetc(const struct sr_dev_inst *sdi, GMatchInfo *match)
{
	struct dev_context *devc;
	struct sr_datafeed_packet packet;
	struct sr_datafeed_analog analog;
	float fvalue;
	char *mstr, *eptr;

	sr_spew("agilent-dmm: FETC reply '%s'", g_match_info_get_string(match));
	devc = sdi->priv;

	if (devc->cur_mq == -1)
		/* Haven't seen configuration yet, so can't know what
		 * the fetched float means. Not really an error, we'll
		 * get metadata soon enough. */
		return SR_OK;

	if (!strcmp(g_match_info_get_string(match), "+9.90000000E+37")) {
		/* An invalid measurement shows up on the display as "O.L, but
		 * comes through like this. Since comparing 38-digit floats
		 * is rather problematic, we'll cut through this here. */
		fvalue = NAN;
	} else {
		mstr = g_match_info_fetch(match, 1);
		fvalue = strtof(mstr, &eptr);
		g_free(mstr);
		if (fvalue == 0.0 && eptr == mstr) {
			sr_err("agilent-dmm: invalid float");
			return SR_ERR;
		}
		if (devc->cur_divider > 0)
			fvalue /= devc->cur_divider;
	}

	memset(&analog, 0, sizeof(struct sr_datafeed_analog));
	analog.mq = devc->cur_mq;
	analog.unit = devc->cur_unit;
	analog.mqflags = devc->cur_mqflags;
	analog.num_samples = 1;
	analog.data = &fvalue;
	packet.type = SR_DF_ANALOG;
	packet.payload = &analog;
	sr_session_send(devc->cb_data, &packet);

	devc->num_samples++;

	return SR_OK;
}

static int send_conf(const struct sr_dev_inst *sdi)
{

	return agdmm_send(sdi, "CONF?");
}

static int recv_conf_u123x(const struct sr_dev_inst *sdi, GMatchInfo *match)
{
	struct dev_context *devc;
	char *mstr;

	sr_spew("agilent-dmm: CONF? response '%s'",  g_match_info_get_string(match));
	devc = sdi->priv;
	mstr = g_match_info_fetch(match, 1);
	if (!strcmp(mstr, "V")) {
		devc->cur_mq = SR_MQ_VOLTAGE;
		devc->cur_unit = SR_UNIT_VOLT;
		devc->cur_mqflags = 0;
		devc->cur_divider = 0;
	} else if(!strcmp(mstr, "MV")) {
		if (devc->mode_tempaux) {
			devc->cur_mq = SR_MQ_TEMPERATURE;
			/* No way to detect whether Fahrenheit or Celcius
			 * is used, so we'll just default to Celcius. */
			devc->cur_unit = SR_UNIT_CELSIUS;
		devc->cur_mqflags = 0;
		devc->cur_divider = 0;
		} else {
			devc->cur_mq = SR_MQ_VOLTAGE;
			devc->cur_unit = SR_UNIT_VOLT;
			devc->cur_mqflags = 0;
			devc->cur_divider = 1000;
		}
	} else if(!strcmp(mstr, "A")) {
		devc->cur_mq = SR_MQ_CURRENT;
		devc->cur_unit = SR_UNIT_AMPERE;
		devc->cur_mqflags = 0;
		devc->cur_divider = 0;
	} else if(!strcmp(mstr, "UA")) {
		devc->cur_mq = SR_MQ_CURRENT;
		devc->cur_unit = SR_UNIT_AMPERE;
		devc->cur_mqflags = 0;
		devc->cur_divider = 1000000;
	} else if(!strcmp(mstr, "FREQ")) {
		devc->cur_mq = SR_MQ_FREQUENCY;
		devc->cur_unit = SR_UNIT_HERTZ;
		devc->cur_mqflags = 0;
		devc->cur_divider = 0;
	} else if(!strcmp(mstr, "RES")) {
		if (devc->mode_continuity) {
			devc->cur_mq = SR_MQ_CONTINUITY;
			devc->cur_unit = SR_UNIT_BOOLEAN;
		} else {
			devc->cur_mq = SR_MQ_RESISTANCE;
			devc->cur_unit = SR_UNIT_OHM;
		}
		devc->cur_mqflags = 0;
		devc->cur_divider = 0;
	} else if(!strcmp(mstr, "CAP")) {
		devc->cur_mq = SR_MQ_CAPACITANCE;
		devc->cur_unit = SR_UNIT_FARAD;
		devc->cur_mqflags = 0;
		devc->cur_divider = 0;
	} else
		sr_dbg("agilent-dmm: unknown first argument");
	g_free(mstr);

	if (g_match_info_get_match_count(match) == 4) {
		mstr = g_match_info_fetch(match, 3);
		/* Third value, if present, is always AC or DC. */
		if (!strcmp(mstr, "AC"))
			devc->cur_mqflags |= SR_MQFLAG_AC;
		else if (!strcmp(mstr, "DC"))
			devc->cur_mqflags |= SR_MQFLAG_DC;
		else
			sr_dbg("agilent-dmm: unknown third argument");
		g_free(mstr);
	} else
		devc->cur_mqflags &= ~(SR_MQFLAG_AC | SR_MQFLAG_DC);

	return SR_OK;
}

static int recv_conf_u125x(const struct sr_dev_inst *sdi, GMatchInfo *match)
{
	struct dev_context *devc;
	char *mstr;

	sr_spew("agilent-dmm: CONF? response '%s'",  g_match_info_get_string(match));
	devc = sdi->priv;
	mstr = g_match_info_fetch(match, 1);
	if (!strncmp(mstr, "VOLT", 4)) {
		devc->cur_mq = SR_MQ_VOLTAGE;
		devc->cur_unit = SR_UNIT_VOLT;
		devc->cur_mqflags = 0;
		devc->cur_divider = 0;
		if (mstr[4] == ':') {
			if (!strcmp(mstr + 4, "AC"))
				devc->cur_mqflags |= SR_MQFLAG_AC;
			else if (!strcmp(mstr + 4, "DC"))
				devc->cur_mqflags |= SR_MQFLAG_DC;
			else
				/* "ACDC" appears as well, no idea what it means. */
				devc->cur_mqflags &= ~(SR_MQFLAG_AC | SR_MQFLAG_DC);
		} else
			devc->cur_mqflags &= ~(SR_MQFLAG_AC | SR_MQFLAG_DC);
	} else if(!strcmp(mstr, "CURR")) {
		devc->cur_mq = SR_MQ_CURRENT;
		devc->cur_unit = SR_UNIT_AMPERE;
		devc->cur_mqflags = 0;
		devc->cur_divider = 0;
	} else if(!strcmp(mstr, "RES")) {
		if (devc->mode_continuity) {
			devc->cur_mq = SR_MQ_CONTINUITY;
			devc->cur_unit = SR_UNIT_BOOLEAN;
		} else {
			devc->cur_mq = SR_MQ_RESISTANCE;
			devc->cur_unit = SR_UNIT_OHM;
		}
		devc->cur_mqflags = 0;
		devc->cur_divider = 0;
} else
		sr_dbg("agilent-dmm: unknown first argument");
	g_free(mstr);


	return SR_OK;
}

/* At least the 123x and 125x appear to have this. */
static int recv_conf(const struct sr_dev_inst *sdi, GMatchInfo *match)
{
	struct dev_context *devc;
	char *mstr;

	sr_spew("agilent-dmm: CONF? response '%s'",  g_match_info_get_string(match));
	devc = sdi->priv;
	mstr = g_match_info_fetch(match, 1);
	if(!strcmp(mstr, "DIOD")) {
		devc->cur_mq = SR_MQ_VOLTAGE;
		devc->cur_unit = SR_UNIT_VOLT;
		devc->cur_mqflags = SR_MQFLAG_DIODE;
		devc->cur_divider = 0;
	} else
		sr_dbg("agilent-dmm: unknown single argument");
	g_free(mstr);

	return SR_OK;
}

/* This comes in whenever the rotary switch is changed to a new position.
 * We could use it to determine the major measurement mode, but we already
 * have the output of CONF? for that, which is more detailed. However
 * we do need to catch this here, or it'll show up in some other output. */
static int recv_switch(const struct sr_dev_inst *sdi, GMatchInfo *match)
{

	(void)sdi;

	sr_spew("agilent-dmm: switch '%s'",  g_match_info_get_string(match));

	return SR_OK;
}


SR_PRIV const struct agdmm_job agdmm_jobs_u123x[] = {
	{ 143, send_stat },
	{ 1000, send_conf },
	{ 143, send_fetc },
	{ 0, NULL }
};

SR_PRIV const struct agdmm_recv agdmm_recvs_u123x[] = {
	{ "^\"(\\d\\d.{18}\\d)\"$", recv_stat_u123x },
	{ "^\\*([0-9])$", recv_switch },
	{ "^([-+][0-9]\\.[0-9]{8}E[-+][0-9]{2})$", recv_fetc },
	{ "^\"(V|MV|A|UA|FREQ),(\\d),(AC|DC)\"$", recv_conf_u123x },
	{ "^\"(RES|CAP),(\\d)\"$", recv_conf_u123x},
	{ "^\"(DIOD)\"$", recv_conf },
	{ NULL, NULL }
};

SR_PRIV const struct agdmm_job agdmm_jobs_u125x[] = {
	{ 143, send_stat },
	{ 1000, send_conf },
	{ 143, send_fetc },
	{ 0, NULL }
};

SR_PRIV const struct agdmm_recv agdmm_recvs_u125x[] = {
	{ "^\"(\\d\\d.{18}\\d)\"$", recv_stat_u125x },
	{ "^\\*([0-9])$", recv_switch },
	{ "^([-+][0-9]\\.[0-9]{8}E[-+][0-9]{2})$", recv_fetc },
	{ "^(VOLT|CURR|RES|CAP) ([-+][0-9\\.E\\-+]+),([-+][0-9\\.E\\-+]+)$", recv_conf_u125x },
	{ "^(VOLT:[ACD]+) ([-+][0-9\\.E\\-+]+),([-+][0-9\\.E\\-+]+)$", recv_conf_u125x },
	{ "^\"(DIOD)\"$", recv_conf },
	{ NULL, 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>
	21	#include "libsigrok.h"
	22	#include "libsigrok-internal.h"
	23	#include "config.h"
	24	#include "agilent-dmm.h"
	25	#include <stdlib.h>
	26	#include <string.h>
	27	#include <errno.h>
	28	#include <math.h>
	29
	30
	31	static void dispatch(const struct sr_dev_inst *sdi)
	32	{
	33	struct dev_context *devc;
	34	const struct agdmm_job *jobs;
	35	int64_t now;
	36	int i;
	37
	38	devc = sdi->priv;
	39	jobs = devc->profile->jobs;
	40	now = g_get_monotonic_time() / 1000;
	41	for (i = 0; (&jobs[i])->interval; i++) {
	42	if (now - devc->jobqueue[i] > (&jobs[i])->interval) {
	43	sr_spew("agilent-dmm: running job %d", i);
	44	(&jobs[i])->send(sdi);
	45	devc->jobqueue[i] = now;
	46	}
	47	}
	48
	49	}
	50
	51	static void receive_line(const struct sr_dev_inst *sdi)
	52	{
	53	struct dev_context *devc;
	54	const struct agdmm_recv recvs, recv;
	55	GRegex *reg;
	56	GMatchInfo *match;
	57	int i;
	58
	59	devc = sdi->priv;
	60
	61	/* Strip CRLF */
	62	while (devc->buflen) {
	63	if (*(devc->buf + devc->buflen - 1) == '\r'
	64	\|\| *(devc->buf + devc->buflen - 1) == '\n')
65	*(devc->buf + --devc->buflen) = '\0';
66	else
67	break;
68	}
69	sr_spew("agilent-dmm: received '%s'", devc->buf);
70
71	recv = NULL;
72	recvs = devc->profile->recvs;
73	for (i = 0; (&recvs[i])->recv_regex; i++) {
74	reg = g_regex_new((&recvs[i])->recv_regex, 0, 0, NULL);
75	if (g_regex_match(reg, (char *)devc->buf, 0, &match)) {
76	recv = &recvs[i];
77	break;
78	}
79	g_match_info_unref(match);
80	g_regex_unref(reg);
81	}
82	if (recv) {
83	recv->recv(sdi, match);
84	g_match_info_unref(match);
85	g_regex_unref(reg);
f2e86bbf BV	86	} else
f2e86bbf BV	87	sr_dbg("agilent-dmm: unknown line '%s'", devc->buf);
e93cdf42 BV	88
	89	/* Done with this. */
	90	devc->buflen = 0;
	91
	92	}
	93
	94	SR_PRIV int agdmm_receive_data(int fd, int revents, void *cb_data)
	95	{
	96	const struct sr_dev_inst *sdi;
	97	struct dev_context *devc;
	98	int len;
	99
	100	if (!(sdi = cb_data))
	101	return TRUE;
	102
	103	if (!(devc = sdi->priv))
	104	return TRUE;
	105
	106	if (revents == G_IO_IN) {
	107	/* Serial data arrived. */
f2e86bbf BV	108	while(AGDMM_BUFSIZE - devc->buflen - 1 > 0) {
	109	len = serial_read(fd, devc->buf + devc->buflen, 1);
	110	if (len < 1)
	111	break;
	112	devc->buflen += len;
	113	*(devc->buf + devc->buflen) = '\0';
	114	if (*(devc->buf + devc->buflen - 1) == '\n') {
	115	/* End of line */
	116	receive_line(sdi);
	117	break;
e93cdf42 BV	118	}
	119	}
	120	}
	121
	122	dispatch(sdi);
	123
	124	if (devc->num_samples >= devc->limit_samples)
	125	sdi->driver->dev_acquisition_stop(sdi, cb_data);
	126
	127	return TRUE;
	128	}
	129
	130	static int agdmm_send(const struct sr_dev_inst sdi, const char cmd)
	131	{
	132	struct dev_context *devc;
	133	char buf[32];
	134
	135	devc = sdi->priv;
	136	sr_spew("agilent-dmm: sending '%s'", cmd);
	137	strncpy(buf, cmd, 28);
	138	if (!strncmp(buf, "*IDN?", 5))
	139	strncat(buf, "\r\n", 32);
	140	else
	141	strncat(buf, "\n\r\n", 32);
	142	if (serial_write(devc->serial->fd, buf, strlen(buf)) == -1) {
	143	sr_err("agilent-dmm: failed to send: %s", strerror(errno));
	144	return SR_ERR;
	145	}
	146
	147	return SR_OK;
	148	}
	149
a4394fb3	150	static int send_stat(const struct sr_dev_inst *sdi)
e93cdf42 BV	151	{
	152
	153	return agdmm_send(sdi, "STAT?");
	154	}
	155
8c0152f2	156	static int recv_stat_u123x(const struct sr_dev_inst sdi, GMatchInfo match)
e93cdf42	157	{
e6b021f3 BV	158	struct dev_context *devc;
	159	char *s;
	160
	161	devc = sdi->priv;
	162	s = g_match_info_fetch(match, 1);
81599cc5	163	sr_spew("agilent-dmm: STAT response '%s'", s);
e6b021f3 BV	164
	165	/* Max, Min or Avg mode -- no way to tell which, so we'll
	166	* set both flags to denote it's not a normal measurement. */
	167	if (s[0] == '1')
	168	devc->cur_mqflags \|= SR_MQFLAG_MAX \| SR_MQFLAG_MIN;
	169	else
	170	devc->cur_mqflags &= ~(SR_MQFLAG_MAX \| SR_MQFLAG_MIN);
e93cdf42	171
e6b021f3 BV	172	if (s[1] == '1')
	173	devc->cur_mqflags \|= SR_MQFLAG_RELATIVE;
	174	else
	175	devc->cur_mqflags &= ~SR_MQFLAG_RELATIVE;
	176
	177	/* Triggered or auto hold modes. */
	178	if (s[2] == '1' \|\| s[3] == '1')
	179	devc->cur_mqflags \|= SR_MQFLAG_HOLD;
	180	else
	181	devc->cur_mqflags &= ~SR_MQFLAG_HOLD;
	182
	183	/* Temp/aux mode. */
	184	if (s[7] == '1')
	185	devc->mode_tempaux = TRUE;
	186	else
	187	devc->mode_tempaux = FALSE;
	188
	189	/* Continuity mode. */
	190	if (s[16] == '1')
	191	devc->mode_continuity = TRUE;
	192	else
	193	devc->mode_continuity = FALSE;
	194
	195	g_free(s);
e93cdf42 BV	196
	197	return SR_OK;
	198	}
	199
8c0152f2 BV	200	static int recv_stat_u125x(const struct sr_dev_inst sdi, GMatchInfo match)
	201	{
	202	struct dev_context *devc;
	203	char *s;
	204
	205	devc = sdi->priv;
	206	s = g_match_info_fetch(match, 1);
	207	sr_spew("agilent-dmm: STAT response '%s'", s);
	208
	209	/* Peak hold mode. */
	210	if (s[4] == '1')
	211	devc->cur_mqflags \|= SR_MQFLAG_MAX;
	212	else
	213	devc->cur_mqflags &= ~SR_MQFLAG_MAX;
	214
	215	/* Triggered hold mode. */
	216	if (s[7] == '1')
	217	devc->cur_mqflags \|= SR_MQFLAG_HOLD;
	218	else
	219	devc->cur_mqflags &= ~SR_MQFLAG_HOLD;
	220
	221	g_free(s);
	222
	223	return SR_OK;
	224	}
	225
a4394fb3	226	static int send_fetc(const struct sr_dev_inst *sdi)
e93cdf42 BV	227	{
	228
	229	return agdmm_send(sdi, "FETC?");
	230	}
	231
a4394fb3	232	static int recv_fetc(const struct sr_dev_inst sdi, GMatchInfo match)
e93cdf42 BV	233	{
	234	struct dev_context *devc;
	235	struct sr_datafeed_packet packet;
	236	struct sr_datafeed_analog analog;
	237	float fvalue;
	238	char mstr, eptr;
	239
	240	sr_spew("agilent-dmm: FETC reply '%s'", g_match_info_get_string(match));
	241	devc = sdi->priv;
	242
	243	if (devc->cur_mq == -1)
	244	/* Haven't seen configuration yet, so can't know what
	245	* the fetched float means. Not really an error, we'll
	246	* get metadata soon enough. */
	247	return SR_OK;
	248
	249	if (!strcmp(g_match_info_get_string(match), "+9.90000000E+37")) {
	250	/* An invalid measurement shows up on the display as "O.L, but
	251	* comes through like this. Since comparing 38-digit floats
	252	* is rather problematic, we'll cut through this here. */
	253	fvalue = NAN;
	254	} else {
	255	mstr = g_match_info_fetch(match, 1);
	256	fvalue = strtof(mstr, &eptr);
	257	g_free(mstr);
	258	if (fvalue == 0.0 && eptr == mstr) {
	259	sr_err("agilent-dmm: invalid float");
	260	return SR_ERR;
	261	}
	262	if (devc->cur_divider > 0)
	263	fvalue /= devc->cur_divider;
	264	}
	265
	266	memset(&analog, 0, sizeof(struct sr_datafeed_analog));
	267	analog.mq = devc->cur_mq;
e6b021f3 BV	268	analog.unit = devc->cur_unit;
e6b021f3 BV	269	analog.mqflags = devc->cur_mqflags;
e93cdf42 BV	270	analog.num_samples = 1;
	271	analog.data = &fvalue;
	272	packet.type = SR_DF_ANALOG;
	273	packet.payload = &analog;
	274	sr_session_send(devc->cb_data, &packet);
	275
	276	devc->num_samples++;
	277
	278	return SR_OK;
	279	}
	280
a4394fb3	281	static int send_conf(const struct sr_dev_inst *sdi)
e93cdf42 BV	282	{
	283
	284	return agdmm_send(sdi, "CONF?");
	285	}
	286
a4394fb3	287	static int recv_conf_u123x(const struct sr_dev_inst sdi, GMatchInfo match)
e93cdf42 BV	288	{
	289	struct dev_context *devc;
	290	char *mstr;
	291
81599cc5	292	sr_spew("agilent-dmm: CONF? response '%s'", g_match_info_get_string(match));
e93cdf42 BV	293	devc = sdi->priv;
	294	mstr = g_match_info_fetch(match, 1);
	295	if (!strcmp(mstr, "V")) {
	296	devc->cur_mq = SR_MQ_VOLTAGE;
e6b021f3 BV	297	devc->cur_unit = SR_UNIT_VOLT;
e6b021f3 BV	298	devc->cur_mqflags = 0;
e93cdf42 BV	299	devc->cur_divider = 0;
e93cdf42 BV	300	} else if(!strcmp(mstr, "MV")) {
e6b021f3 BV	301	if (devc->mode_tempaux) {
	302	devc->cur_mq = SR_MQ_TEMPERATURE;
	303	/* No way to detect whether Fahrenheit or Celcius
	304	* is used, so we'll just default to Celcius. */
	305	devc->cur_unit = SR_UNIT_CELSIUS;
	306	devc->cur_mqflags = 0;
	307	devc->cur_divider = 0;
	308	} else {
	309	devc->cur_mq = SR_MQ_VOLTAGE;
	310	devc->cur_unit = SR_UNIT_VOLT;
	311	devc->cur_mqflags = 0;
	312	devc->cur_divider = 1000;
	313	}
e93cdf42 BV	314	} else if(!strcmp(mstr, "A")) {
e93cdf42 BV	315	devc->cur_mq = SR_MQ_CURRENT;
e6b021f3 BV	316	devc->cur_unit = SR_UNIT_AMPERE;
e6b021f3 BV	317	devc->cur_mqflags = 0;
e93cdf42 BV	318	devc->cur_divider = 0;
	319	} else if(!strcmp(mstr, "UA")) {
	320	devc->cur_mq = SR_MQ_CURRENT;
e6b021f3 BV	321	devc->cur_unit = SR_UNIT_AMPERE;
e6b021f3 BV	322	devc->cur_mqflags = 0;
e93cdf42 BV	323	devc->cur_divider = 1000000;
	324	} else if(!strcmp(mstr, "FREQ")) {
	325	devc->cur_mq = SR_MQ_FREQUENCY;
e6b021f3 BV	326	devc->cur_unit = SR_UNIT_HERTZ;
e6b021f3 BV	327	devc->cur_mqflags = 0;
e93cdf42 BV	328	devc->cur_divider = 0;
e93cdf42 BV	329	} else if(!strcmp(mstr, "RES")) {
e6b021f3 BV	330	if (devc->mode_continuity) {
	331	devc->cur_mq = SR_MQ_CONTINUITY;
	332	devc->cur_unit = SR_UNIT_BOOLEAN;
	333	} else {
	334	devc->cur_mq = SR_MQ_RESISTANCE;
	335	devc->cur_unit = SR_UNIT_OHM;
	336	}
	337	devc->cur_mqflags = 0;
e93cdf42 BV	338	devc->cur_divider = 0;
	339	} else if(!strcmp(mstr, "CAP")) {
	340	devc->cur_mq = SR_MQ_CAPACITANCE;
e6b021f3 BV	341	devc->cur_unit = SR_UNIT_FARAD;
e6b021f3 BV	342	devc->cur_mqflags = 0;
e93cdf42	343	devc->cur_divider = 0;
e93cdf42 BV	344	} else
	345	sr_dbg("agilent-dmm: unknown first argument");
	346	g_free(mstr);
	347
e066c32a BV	348	if (g_match_info_get_match_count(match) == 4) {
e066c32a BV	349	mstr = g_match_info_fetch(match, 3);
e93cdf42 BV	350	/* Third value, if present, is always AC or DC. */
e93cdf42 BV	351	if (!strcmp(mstr, "AC"))
e6b021f3	352	devc->cur_mqflags \|= SR_MQFLAG_AC;
e93cdf42	353	else if (!strcmp(mstr, "DC"))
e6b021f3	354	devc->cur_mqflags \|= SR_MQFLAG_DC;
e93cdf42 BV	355	else
	356	sr_dbg("agilent-dmm: unknown third argument");
	357	g_free(mstr);
e6b021f3 BV	358	} else
e6b021f3 BV	359	devc->cur_mqflags &= ~(SR_MQFLAG_AC \| SR_MQFLAG_DC);
e93cdf42 BV	360
	361	return SR_OK;
	362	}
	363
8c0152f2 BV	364	static int recv_conf_u125x(const struct sr_dev_inst sdi, GMatchInfo match)
	365	{
	366	struct dev_context *devc;
	367	char *mstr;
	368
	369	sr_spew("agilent-dmm: CONF? response '%s'", g_match_info_get_string(match));
	370	devc = sdi->priv;
	371	mstr = g_match_info_fetch(match, 1);
	372	if (!strncmp(mstr, "VOLT", 4)) {
	373	devc->cur_mq = SR_MQ_VOLTAGE;
	374	devc->cur_unit = SR_UNIT_VOLT;
	375	devc->cur_mqflags = 0;
	376	devc->cur_divider = 0;
	377	if (mstr[4] == ':') {
	378	if (!strcmp(mstr + 4, "AC"))
	379	devc->cur_mqflags \|= SR_MQFLAG_AC;
	380	else if (!strcmp(mstr + 4, "DC"))
	381	devc->cur_mqflags \|= SR_MQFLAG_DC;
	382	else
	383	/* "ACDC" appears as well, no idea what it means. */
	384	devc->cur_mqflags &= ~(SR_MQFLAG_AC \| SR_MQFLAG_DC);
	385	} else
	386	devc->cur_mqflags &= ~(SR_MQFLAG_AC \| SR_MQFLAG_DC);
	387	} else if(!strcmp(mstr, "CURR")) {
	388	devc->cur_mq = SR_MQ_CURRENT;
	389	devc->cur_unit = SR_UNIT_AMPERE;
	390	devc->cur_mqflags = 0;
	391	devc->cur_divider = 0;
	392	} else if(!strcmp(mstr, "RES")) {
	393	if (devc->mode_continuity) {
	394	devc->cur_mq = SR_MQ_CONTINUITY;
	395	devc->cur_unit = SR_UNIT_BOOLEAN;
	396	} else {
	397	devc->cur_mq = SR_MQ_RESISTANCE;
	398	devc->cur_unit = SR_UNIT_OHM;
	399	}
	400	devc->cur_mqflags = 0;
	401	devc->cur_divider = 0;
	402	} else
	403	sr_dbg("agilent-dmm: unknown first argument");
	404	g_free(mstr);
	405
	406
	407	return SR_OK;
	408	}
	409
a4394fb3 BV	410	/* At least the 123x and 125x appear to have this. */
	411	static int recv_conf(const struct sr_dev_inst sdi, GMatchInfo match)
	412	{
	413	struct dev_context *devc;
	414	char *mstr;
	415
	416	sr_spew("agilent-dmm: CONF? response '%s'", g_match_info_get_string(match));
	417	devc = sdi->priv;
	418	mstr = g_match_info_fetch(match, 1);
	419	if(!strcmp(mstr, "DIOD")) {
	420	devc->cur_mq = SR_MQ_VOLTAGE;
	421	devc->cur_unit = SR_UNIT_VOLT;
	422	devc->cur_mqflags = SR_MQFLAG_DIODE;
	423	devc->cur_divider = 0;
8c0152f2 BV	424	} else
8c0152f2 BV	425	sr_dbg("agilent-dmm: unknown single argument");
a4394fb3 BV	426	g_free(mstr);
	427
	428	return SR_OK;
	429	}
	430
81599cc5 BV	431	/* This comes in whenever the rotary switch is changed to a new position.
	432	* We could use it to determine the major measurement mode, but we already
	433	* have the output of CONF? for that, which is more detailed. However
	434	* we do need to catch this here, or it'll show up in some other output. */
a4394fb3	435	static int recv_switch(const struct sr_dev_inst sdi, GMatchInfo match)
e93cdf42 BV	436	{
	437
	438	(void)sdi;
	439
81599cc5	440	sr_spew("agilent-dmm: switch '%s'", g_match_info_get_string(match));
e93cdf42 BV	441
	442	return SR_OK;
	443	}
	444
	445
8c0152f2	446	SR_PRIV const struct agdmm_job agdmm_jobs_u123x[] = {
a4394fb3 BV	447	{ 143, send_stat },
	448	{ 1000, send_conf },
	449	{ 143, send_fetc },
e93cdf42 BV	450	{ 0, NULL }
	451	};
	452
8c0152f2 BV	453	SR_PRIV const struct agdmm_recv agdmm_recvs_u123x[] = {
8c0152f2 BV	454	{ "^\"(\\d\\d.{18}\\d)\"$", recv_stat_u123x },
a4394fb3 BV	455	{ "^\\*([0-9])$", recv_switch },
	456	{ "^([-+][0-9]\\.[0-9]{8}E[-+][0-9]{2})$", recv_fetc },
	457	{ "^\"(V\|MV\|A\|UA\|FREQ),(\\d),(AC\|DC)\"$", recv_conf_u123x },
	458	{ "^\"(RES\|CAP),(\\d)\"$", recv_conf_u123x},
	459	{ "^\"(DIOD)\"$", recv_conf },
e93cdf42 BV	460	{ NULL, NULL }
	461	};
	462
8c0152f2 BV	463	SR_PRIV const struct agdmm_job agdmm_jobs_u125x[] = {
	464	{ 143, send_stat },
	465	{ 1000, send_conf },
	466	{ 143, send_fetc },
	467	{ 0, NULL }
	468	};
	469
	470	SR_PRIV const struct agdmm_recv agdmm_recvs_u125x[] = {
	471	{ "^\"(\\d\\d.{18}\\d)\"$", recv_stat_u125x },
	472	{ "^\\*([0-9])$", recv_switch },
	473	{ "^([-+][0-9]\\.[0-9]{8}E[-+][0-9]{2})$", recv_fetc },
	474	{ "^(VOLT\|CURR\|RES\|CAP) ([-+][0-9\\.E\\-+]+),([-+][0-9\\.E\\-+]+)$", recv_conf_u125x },
	475	{ "^(VOLT:[ACD]+) ([-+][0-9\\.E\\-+]+),([-+][0-9\\.E\\-+]+)$", recv_conf_u125x },
	476	{ "^\"(DIOD)\"$", recv_conf },
	477	{ NULL, NULL }
	478	};
	479
e93cdf42	480