[libsigrok.git] / hardware / agilent-dmm / sched.c

/*
 * This file is part of the libsigrok 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 "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("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("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("Unknown line '%s'.", devc->buf);

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

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

	(void)fd;

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

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

	serial = sdi->conn;
	if (revents == G_IO_IN) {
		/* Serial data arrived. */
		while(AGDMM_BUFSIZE - devc->buflen - 1 > 0) {
			len = serial_read(serial, 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->limit_samples && 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 sr_serial_dev_inst *serial;
	char buf[32];

	serial = sdi->conn;

	sr_spew("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(serial, buf, strlen(buf)) == -1) {
		sr_err("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("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("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;

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