[libsigrok.git] / hardware / common / dmm / metex14.c

/*
 * This file is part of the libsigrok project.
 *
 * Copyright (C) 2012-2013 Uwe Hermann <uwe@hermann-uwe.de>
 *
 * 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 2 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, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
 */

/*
 * Metex 14-bytes ASCII protocol parser.
 *
 * This should work for various multimeters which use this kind of protocol,
 * even though there is some variation in which modes each DMM supports.
 *
 * It does _not_ work for all Metex DMMs, some use a quite different protocol.
 */

#include <string.h>
#include <ctype.h>
#include <math.h>
#include <glib.h>
#include "libsigrok.h"
#include "libsigrok-internal.h"

/* Message logging helpers with subsystem-specific prefix string. */
#define LOG_PREFIX "metex14: "
#define sr_log(l, s, args...) sr_log(l, LOG_PREFIX s, ## args)
#define sr_spew(s, args...) sr_spew(LOG_PREFIX s, ## args)
#define sr_dbg(s, args...) sr_dbg(LOG_PREFIX s, ## args)
#define sr_info(s, args...) sr_info(LOG_PREFIX s, ## args)
#define sr_warn(s, args...) sr_warn(LOG_PREFIX s, ## args)
#define sr_err(s, args...) sr_err(LOG_PREFIX s, ## args)

static int parse_value(const uint8_t *buf, float *result)
{
	int i, is_ol, cnt;
	char valstr[7 + 1];

	/* Strip all spaces from bytes 2-8. */
	memset(&valstr, 0, 7 + 1);
	for (i = 0, cnt = 0; i < 7; i++) {
		if (buf[2 + i] != ' ')
			valstr[cnt++] = buf[2 + i];
	}

	/* Bytes 5-7: Over limit (various forms) */
	is_ol = 0;
	is_ol += (!strcasecmp((const char *)&valstr, ".OL")) ? 1 : 0;
	is_ol += (!strcasecmp((const char *)&valstr, "O.L")) ? 1 : 0;
	is_ol += (!strcasecmp((const char *)&valstr, "OL.")) ? 1 : 0;
	is_ol += (!strcasecmp((const char *)&valstr, "OL")) ? 1 : 0;
	is_ol += (!strcasecmp((const char *)&valstr, "-.OL")) ? 1 : 0;
	is_ol += (!strcasecmp((const char *)&valstr, "-O.L")) ? 1 : 0;
	is_ol += (!strcasecmp((const char *)&valstr, "-OL.")) ? 1 : 0;
	is_ol += (!strcasecmp((const char *)&valstr, "-OL")) ? 1 : 0;
	if (is_ol != 0) {
		sr_spew("Over limit.");
		*result = INFINITY;
		return SR_OK;
	}

	/* Bytes 2-8: Sign, value (up to 5 digits) and decimal point */
	sscanf((const char *)&valstr, "%f", result);

	sr_spew("The display value is %f.", *result);

	return SR_OK;
}

static void parse_flags(const char *buf, struct metex14_info *info)
{
	int i, cnt;
	char unit[4 + 1];
	const char *u;

	/* Bytes 0-1: Measurement mode */
	/* Note: Protocol doesn't distinguish "resistance" from "beep" mode. */
	info->is_ac          = !strncmp(buf, "AC", 2);
	info->is_dc          = !strncmp(buf, "DC", 2);
	info->is_resistance  = !strncmp(buf, "OH", 2);
	info->is_capacity    = !strncmp(buf, "CA", 2);
	info->is_temperature = !strncmp(buf, "TE", 2);
	info->is_diode       = !strncmp(buf, "DI", 2);
	info->is_frequency   = !strncmp(buf, "FR", 2);
	info->is_gain        = !strncmp(buf, "DB", 2);
	info->is_hfe         = !strncmp(buf, "HF", 2);

	/*
	 * Note: "DB" shows the logarithmic ratio of input voltage to a
	 * pre-stored (user-changeable) value in the DMM.
	 */

	if (info->is_dc || info->is_ac)
		info->is_volt = TRUE;

	/* Bytes 2-8: See parse_value(). */

	/* Strip all spaces from bytes 9-12. */
	memset(&unit, 0, 4 + 1);
	for (i = 0, cnt = 0; i < 4; i++) {
		if (buf[9 + i] != ' ')
			unit[cnt++] = buf[9 + i];
	}

	/* Bytes 9-12: Unit */
	u = (const char *)&unit;
	if (!strcasecmp(u, "A"))
		info->is_ampere = TRUE;
	else if (!strcasecmp(u, "mA"))
		info->is_milli = info->is_ampere = TRUE;
	else if (!strcasecmp(u, "uA"))
		info->is_micro = info->is_ampere = TRUE;
	else if (!strcasecmp(u, "V"))
		info->is_volt = TRUE;
	else if (!strcasecmp(u, "mV"))
		info->is_milli = info->is_volt = TRUE;
	else if (!strcasecmp(u, "Ohm"))
		info->is_ohm = TRUE;
	else if (!strcasecmp(u, "KOhm"))
		info->is_kilo = info->is_ohm = TRUE;
	else if (!strcasecmp(u, "MOhm"))
		info->is_mega = info->is_ohm = TRUE;
	else if (!strcasecmp(u, "pF"))
		info->is_pico = info->is_farad = TRUE;
	else if (!strcasecmp(u, "nF"))
		info->is_nano = info->is_farad = TRUE;
	else if (!strcasecmp(u, "uF"))
		info->is_micro = info->is_farad = TRUE;
	else if (!strcasecmp(u, "KHz"))
		info->is_kilo = info->is_hertz = TRUE;
	else if (!strcasecmp(u, "C"))
		info->is_celsius = TRUE;
	else if (!strcasecmp(u, "DB"))
		info->is_decibel = TRUE;
	else if (!strcasecmp(u, ""))
		info->is_unitless = TRUE;

	/* Byte 13: Always '\r' (carriage return, 0x0d, 13) */
}

static void handle_flags(struct sr_datafeed_analog *analog, float *floatval,
			 const struct metex14_info *info)
{
	/* Factors */
	if (info->is_pico)
		*floatval /= 1000000000000ULL;
	if (info->is_nano)
		*floatval /= 1000000000;
	if (info->is_micro)
		*floatval /= 1000000;
	if (info->is_milli)
		*floatval /= 1000;
	if (info->is_kilo)
		*floatval *= 1000;
	if (info->is_mega)
		*floatval *= 1000000;

	/* Measurement modes */
	if (info->is_volt) {
		analog->mq = SR_MQ_VOLTAGE;
		analog->unit = SR_UNIT_VOLT;
	}
	if (info->is_ampere) {
		analog->mq = SR_MQ_CURRENT;
		analog->unit = SR_UNIT_AMPERE;
	}
	if (info->is_ohm) {
		analog->mq = SR_MQ_RESISTANCE;
		analog->unit = SR_UNIT_OHM;
	}
	if (info->is_hertz) {
		analog->mq = SR_MQ_FREQUENCY;
		analog->unit = SR_UNIT_HERTZ;
	}
	if (info->is_farad) {
		analog->mq = SR_MQ_CAPACITANCE;
		analog->unit = SR_UNIT_FARAD;
	}
	if (info->is_celsius) {
		analog->mq = SR_MQ_TEMPERATURE;
		analog->unit = SR_UNIT_CELSIUS;
	}
	if (info->is_diode) {
		analog->mq = SR_MQ_VOLTAGE;
		analog->unit = SR_UNIT_VOLT;
	}
	if (info->is_gain) {
		analog->mq = SR_MQ_GAIN;
		analog->unit = SR_UNIT_DECIBEL_VOLT;
	}
	if (info->is_hfe) {
		analog->mq = SR_MQ_GAIN;
		analog->unit = SR_UNIT_UNITLESS;
	}

	/* Measurement related flags */
	if (info->is_ac)
		analog->mqflags |= SR_MQFLAG_AC;
	if (info->is_dc)
		analog->mqflags |= SR_MQFLAG_DC;
	if (info->is_diode)
		analog->mqflags |= SR_MQFLAG_DIODE;
}

static gboolean flags_valid(const struct metex14_info *info)
{
	int count;

	/* Does the packet have more than one multiplier? */
	count = 0;
	count += (info->is_pico) ? 1 : 0;
	count += (info->is_nano) ? 1 : 0;
	count += (info->is_micro) ? 1 : 0;
	count += (info->is_milli) ? 1 : 0;
	count += (info->is_kilo) ? 1 : 0;
	count += (info->is_mega) ? 1 : 0;
	if (count > 1) {
		sr_err("More than one multiplier detected in packet.");
		return FALSE;
	}

	/* Does the packet "measure" more than one type of value? */
	count = 0;
	count += (info->is_ac) ? 1 : 0;
	count += (info->is_dc) ? 1 : 0;
	count += (info->is_resistance) ? 1 : 0;
	count += (info->is_capacity) ? 1 : 0;
	count += (info->is_temperature) ? 1 : 0;
	count += (info->is_diode) ? 1 : 0;
	count += (info->is_frequency) ? 1 : 0;
	if (count > 1) {
		sr_err("More than one measurement type detected in packet.");
		return FALSE;
	}

	/* Both AC and DC set? */
	if (info->is_ac && info->is_dc) {
		sr_err("Both AC and DC flags detected in packet.");
		return FALSE;
	}

	return TRUE;
}

#ifdef HAVE_LIBSERIALPORT
SR_PRIV int sr_metex14_packet_request(struct sr_serial_dev_inst *serial)
{
	const uint8_t wbuf = 'D';

	sr_spew("Requesting DMM packet.");

	return (serial_write(serial, &wbuf, 1) == 1) ? SR_OK : SR_ERR;
}
#endif

SR_PRIV gboolean sr_metex14_packet_valid(const uint8_t *buf)
{
	struct metex14_info info;

	memset(&info, 0x00, sizeof(struct metex14_info));
	parse_flags((const char *)buf, &info);

	if (!flags_valid(&info))
		return FALSE;

	if (buf[13] != '\r')
		return FALSE;

	return TRUE;
}

/**
 * Parse a protocol packet.
 *
 * @param buf Buffer containing the protocol packet. Must not be NULL.
 * @param floatval Pointer to a float variable. That variable will be modified
 *                 in-place depending on the protocol packet. Must not be NULL.
 * @param analog Pointer to a struct sr_datafeed_analog. The struct will be
 *               filled with data according to the protocol packet.
 *               Must not be NULL.
 * @param info Pointer to a struct metex14_info. The struct will be filled
 *             with data according to the protocol packet. Must not be NULL.
 *
 * @return SR_OK upon success, SR_ERR upon failure. Upon errors, the
 *         'analog' variable contents are undefined and should not be used.
 */
SR_PRIV int sr_metex14_parse(const uint8_t *buf, float *floatval,
			     struct sr_datafeed_analog *analog, void *info)
{
	int ret;
	struct metex14_info *info_local;

	info_local = (struct metex14_info *)info;

	/* Don't print byte 13. That one contains the carriage return. */
	sr_dbg("DMM packet: \"%.13s\"", buf);

	if ((ret = parse_value(buf, floatval)) != SR_OK) {
		sr_err("Error parsing value: %d.", ret);
		return ret;
	}

	memset(info_local, 0x00, sizeof(struct metex14_info));
	parse_flags((const char *)buf, info_local);
	handle_flags(analog, floatval, info_local);

	return SR_OK;
}
Commit	Line	Data
ac913e5c	1	/*
50985c20	2	* This file is part of the libsigrok project.
ac913e5c	3	*
71f1302b	4	* Copyright (C) 2012-2013 Uwe Hermann <uwe@hermann-uwe.de>
ac913e5c UH	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 2 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, write to the Free Software
	18	* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
	19	*/
	20
	21	/*
	22	* Metex 14-bytes ASCII protocol parser.
	23	*
	24	* This should work for various multimeters which use this kind of protocol,
	25	* even though there is some variation in which modes each DMM supports.
	26	*
	27	* It does _not_ work for all Metex DMMs, some use a quite different protocol.
	28	*/
	29
	30	#include <string.h>
	31	#include <ctype.h>
	32	#include <math.h>
	33	#include <glib.h>
	34	#include "libsigrok.h"
	35	#include "libsigrok-internal.h"
	36
29a27196 UH	37	/* Message logging helpers with subsystem-specific prefix string. */
	38	#define LOG_PREFIX "metex14: "
	39	#define sr_log(l, s, args...) sr_log(l, LOG_PREFIX s, ## args)
	40	#define sr_spew(s, args...) sr_spew(LOG_PREFIX s, ## args)
	41	#define sr_dbg(s, args...) sr_dbg(LOG_PREFIX s, ## args)
	42	#define sr_info(s, args...) sr_info(LOG_PREFIX s, ## args)
	43	#define sr_warn(s, args...) sr_warn(LOG_PREFIX s, ## args)
	44	#define sr_err(s, args...) sr_err(LOG_PREFIX s, ## args)
ac913e5c UH	45
	46	static int parse_value(const uint8_t buf, float result)
	47	{
1a807c13 UH	48	int i, is_ol, cnt;
	49	char valstr[7 + 1];
	50
	51	/* Strip all spaces from bytes 2-8. */
	52	memset(&valstr, 0, 7 + 1);
	53	for (i = 0, cnt = 0; i < 7; i++) {
	54	if (buf[2 + i] != ' ')
	55	valstr[cnt++] = buf[2 + i];
ac913e5c UH	56	}
	57
	58	/* Bytes 5-7: Over limit (various forms) */
	59	is_ol = 0;
ee6cb5a4 UH	60	is_ol += (!strcasecmp((const char *)&valstr, ".OL")) ? 1 : 0;
	61	is_ol += (!strcasecmp((const char *)&valstr, "O.L")) ? 1 : 0;
	62	is_ol += (!strcasecmp((const char *)&valstr, "OL.")) ? 1 : 0;
	63	is_ol += (!strcasecmp((const char *)&valstr, "OL")) ? 1 : 0;
3a8cad91 UH	64	is_ol += (!strcasecmp((const char *)&valstr, "-.OL")) ? 1 : 0;
	65	is_ol += (!strcasecmp((const char *)&valstr, "-O.L")) ? 1 : 0;
	66	is_ol += (!strcasecmp((const char *)&valstr, "-OL.")) ? 1 : 0;
	67	is_ol += (!strcasecmp((const char *)&valstr, "-OL")) ? 1 : 0;
ac913e5c UH	68	if (is_ol != 0) {
	69	sr_spew("Over limit.");
	70	*result = INFINITY;
	71	return SR_OK;
	72	}
	73
1a807c13 UH	74	/* Bytes 2-8: Sign, value (up to 5 digits) and decimal point */
1a807c13 UH	75	sscanf((const char *)&valstr, "%f", result);
ac913e5c	76
1a807c13	77	sr_spew("The display value is %f.", *result);
ac913e5c UH	78
	79	return SR_OK;
	80	}
	81
	82	static void parse_flags(const char buf, struct metex14_info info)
	83	{
71f1302b UH	84	int i, cnt;
	85	char unit[4 + 1];
	86	const char *u;
	87
ac913e5c UH	88	/* Bytes 0-1: Measurement mode */
	89	/* Note: Protocol doesn't distinguish "resistance" from "beep" mode. */
	90	info->is_ac = !strncmp(buf, "AC", 2);
	91	info->is_dc = !strncmp(buf, "DC", 2);
	92	info->is_resistance = !strncmp(buf, "OH", 2);
	93	info->is_capacity = !strncmp(buf, "CA", 2);
	94	info->is_temperature = !strncmp(buf, "TE", 2);
	95	info->is_diode = !strncmp(buf, "DI", 2);
	96	info->is_frequency = !strncmp(buf, "FR", 2);
9871215c UH	97	info->is_gain = !strncmp(buf, "DB", 2);
	98	info->is_hfe = !strncmp(buf, "HF", 2);
	99
	100	/*
	101	* Note: "DB" shows the logarithmic ratio of input voltage to a
	102	* pre-stored (user-changeable) value in the DMM.
	103	*/
ac913e5c UH	104
	105	if (info->is_dc \|\| info->is_ac)
	106	info->is_volt = TRUE;
	107
1a807c13	108	/* Bytes 2-8: See parse_value(). */
ac913e5c	109
1a807c13	110	/* Strip all spaces from bytes 9-12. */
71f1302b UH	111	memset(&unit, 0, 4 + 1);
	112	for (i = 0, cnt = 0; i < 4; i++) {
	113	if (buf[9 + i] != ' ')
	114	unit[cnt++] = buf[9 + i];
	115	}
1a807c13 UH	116
1a807c13 UH	117	/* Bytes 9-12: Unit */
71f1302b	118	u = (const char *)&unit;
ee6cb5a4	119	if (!strcasecmp(u, "A"))
ac913e5c	120	info->is_ampere = TRUE;
ee6cb5a4	121	else if (!strcasecmp(u, "mA"))
ac913e5c	122	info->is_milli = info->is_ampere = TRUE;
ee6cb5a4	123	else if (!strcasecmp(u, "uA"))
2477fb95	124	info->is_micro = info->is_ampere = TRUE;
ee6cb5a4	125	else if (!strcasecmp(u, "V"))
ac913e5c	126	info->is_volt = TRUE;
ee6cb5a4	127	else if (!strcasecmp(u, "mV"))
ac913e5c	128	info->is_milli = info->is_volt = TRUE;
ee6cb5a4	129	else if (!strcasecmp(u, "Ohm"))
ac913e5c	130	info->is_ohm = TRUE;
ee6cb5a4	131	else if (!strcasecmp(u, "KOhm"))
ac913e5c	132	info->is_kilo = info->is_ohm = TRUE;
ee6cb5a4	133	else if (!strcasecmp(u, "MOhm"))
ac913e5c	134	info->is_mega = info->is_ohm = TRUE;
c02dc3e2 UH	135	else if (!strcasecmp(u, "pF"))
c02dc3e2 UH	136	info->is_pico = info->is_farad = TRUE;
ee6cb5a4	137	else if (!strcasecmp(u, "nF"))
ac913e5c	138	info->is_nano = info->is_farad = TRUE;
ee6cb5a4	139	else if (!strcasecmp(u, "uF"))
ac913e5c	140	info->is_micro = info->is_farad = TRUE;
ee6cb5a4	141	else if (!strcasecmp(u, "KHz"))
ac913e5c	142	info->is_kilo = info->is_hertz = TRUE;
ee6cb5a4	143	else if (!strcasecmp(u, "C"))
ac913e5c	144	info->is_celsius = TRUE;
ee6cb5a4	145	else if (!strcasecmp(u, "DB"))
9871215c	146	info->is_decibel = TRUE;
ee6cb5a4	147	else if (!strcasecmp(u, ""))
9871215c	148	info->is_unitless = TRUE;
ac913e5c UH	149
	150	/* Byte 13: Always '\r' (carriage return, 0x0d, 13) */
	151	}
	152
	153	static void handle_flags(struct sr_datafeed_analog analog, float floatval,
	154	const struct metex14_info *info)
	155	{
	156	/* Factors */
c02dc3e2 UH	157	if (info->is_pico)
c02dc3e2 UH	158	*floatval /= 1000000000000ULL;
ac913e5c UH	159	if (info->is_nano)
	160	*floatval /= 1000000000;
	161	if (info->is_micro)
	162	*floatval /= 1000000;
	163	if (info->is_milli)
	164	*floatval /= 1000;
	165	if (info->is_kilo)
	166	floatval = 1000;
	167	if (info->is_mega)
	168	floatval = 1000000;
	169
	170	/* Measurement modes */
	171	if (info->is_volt) {
	172	analog->mq = SR_MQ_VOLTAGE;
	173	analog->unit = SR_UNIT_VOLT;
	174	}
	175	if (info->is_ampere) {
	176	analog->mq = SR_MQ_CURRENT;
	177	analog->unit = SR_UNIT_AMPERE;
	178	}
	179	if (info->is_ohm) {
	180	analog->mq = SR_MQ_RESISTANCE;
	181	analog->unit = SR_UNIT_OHM;
	182	}
	183	if (info->is_hertz) {
	184	analog->mq = SR_MQ_FREQUENCY;
	185	analog->unit = SR_UNIT_HERTZ;
	186	}
	187	if (info->is_farad) {
	188	analog->mq = SR_MQ_CAPACITANCE;
	189	analog->unit = SR_UNIT_FARAD;
	190	}
	191	if (info->is_celsius) {
	192	analog->mq = SR_MQ_TEMPERATURE;
	193	analog->unit = SR_UNIT_CELSIUS;
	194	}
	195	if (info->is_diode) {
	196	analog->mq = SR_MQ_VOLTAGE;
	197	analog->unit = SR_UNIT_VOLT;
	198	}
9871215c UH	199	if (info->is_gain) {
	200	analog->mq = SR_MQ_GAIN;
	201	analog->unit = SR_UNIT_DECIBEL_VOLT;
	202	}
	203	if (info->is_hfe) {
	204	analog->mq = SR_MQ_GAIN;
	205	analog->unit = SR_UNIT_UNITLESS;
	206	}
ac913e5c UH	207
	208	/* Measurement related flags */
	209	if (info->is_ac)
	210	analog->mqflags \|= SR_MQFLAG_AC;
	211	if (info->is_dc)
	212	analog->mqflags \|= SR_MQFLAG_DC;
a6ed50f4 UH	213	if (info->is_diode)
a6ed50f4 UH	214	analog->mqflags \|= SR_MQFLAG_DIODE;
ac913e5c UH	215	}
	216
	217	static gboolean flags_valid(const struct metex14_info *info)
	218	{
	219	int count;
	220
	221	/* Does the packet have more than one multiplier? */
	222	count = 0;
c02dc3e2	223	count += (info->is_pico) ? 1 : 0;
ac913e5c UH	224	count += (info->is_nano) ? 1 : 0;
	225	count += (info->is_micro) ? 1 : 0;
	226	count += (info->is_milli) ? 1 : 0;
	227	count += (info->is_kilo) ? 1 : 0;
	228	count += (info->is_mega) ? 1 : 0;
	229	if (count > 1) {
	230	sr_err("More than one multiplier detected in packet.");
	231	return FALSE;
	232	}
	233
	234	/* Does the packet "measure" more than one type of value? */
	235	count = 0;
	236	count += (info->is_ac) ? 1 : 0;
	237	count += (info->is_dc) ? 1 : 0;
	238	count += (info->is_resistance) ? 1 : 0;
	239	count += (info->is_capacity) ? 1 : 0;
	240	count += (info->is_temperature) ? 1 : 0;
	241	count += (info->is_diode) ? 1 : 0;
	242	count += (info->is_frequency) ? 1 : 0;
	243	if (count > 1) {
	244	sr_err("More than one measurement type detected in packet.");
	245	return FALSE;
	246	}
	247
	248	/* Both AC and DC set? */
	249	if (info->is_ac && info->is_dc) {
	250	sr_err("Both AC and DC flags detected in packet.");
	251	return FALSE;
	252	}
	253
	254	return TRUE;
	255	}
	256
c4f2dfd0	257	#ifdef HAVE_LIBSERIALPORT
e90cf076 UH	258	SR_PRIV int sr_metex14_packet_request(struct sr_serial_dev_inst *serial)
	259	{
	260	const uint8_t wbuf = 'D';
	261
	262	sr_spew("Requesting DMM packet.");
	263
	264	return (serial_write(serial, &wbuf, 1) == 1) ? SR_OK : SR_ERR;
	265	}
c4f2dfd0	266	#endif
e90cf076	267
ac913e5c UH	268	SR_PRIV gboolean sr_metex14_packet_valid(const uint8_t *buf)
	269	{
	270	struct metex14_info info;
	271
	272	memset(&info, 0x00, sizeof(struct metex14_info));
	273	parse_flags((const char *)buf, &info);
	274
	275	if (!flags_valid(&info))
	276	return FALSE;
	277
	278	if (buf[13] != '\r')
	279	return FALSE;
	280
	281	return TRUE;
	282	}
	283
	284	/**
	285	* Parse a protocol packet.
	286	*
1fbab466	287	* @param buf Buffer containing the protocol packet. Must not be NULL.
ac913e5c	288	* @param floatval Pointer to a float variable. That variable will be modified
1fbab466	289	* in-place depending on the protocol packet. Must not be NULL.
ac913e5c UH	290	* @param analog Pointer to a struct sr_datafeed_analog. The struct will be
ac913e5c UH	291	* filled with data according to the protocol packet.
1fbab466 UH	292	* Must not be NULL.
	293	* @param info Pointer to a struct metex14_info. The struct will be filled
	294	* with data according to the protocol packet. Must not be NULL.
ac913e5c UH	295	*
	296	* @return SR_OK upon success, SR_ERR upon failure. Upon errors, the
	297	* 'analog' variable contents are undefined and should not be used.
	298	*/
	299	SR_PRIV int sr_metex14_parse(const uint8_t buf, float floatval,
1fbab466	300	struct sr_datafeed_analog analog, void info)
ac913e5c UH	301	{
ac913e5c UH	302	int ret;
1fbab466 UH	303	struct metex14_info *info_local;
	304
	305	info_local = (struct metex14_info *)info;
ac913e5c	306
e82d7dbc AG	307	/* Don't print byte 13. That one contains the carriage return. */
	308	sr_dbg("DMM packet: \"%.13s\"", buf);
	309
ac913e5c UH	310	if ((ret = parse_value(buf, floatval)) != SR_OK) {
	311	sr_err("Error parsing value: %d.", ret);
	312	return ret;
	313	}
	314
1fbab466 UH	315	memset(info_local, 0x00, sizeof(struct metex14_info));
	316	parse_flags((const char *)buf, info_local);
	317	handle_flags(analog, floatval, info_local);
ac913e5c UH	318
	319	return SR_OK;
	320	}