[libsigrok.git] / src / dmm / ut71x.c

/*
 * This file is part of the libsigrok project.
 *
 * Copyright (C) 2014 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, see <http://www.gnu.org/licenses/>.
 */

/*
 * UNI-T UT71x protocol parser.
 *
 * Communication parameters: Unidirectional, 2400/7o1
 */

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

#define LOG_PREFIX "ut71x"

/*
 * Exponents for the respective measurement mode.
 *
 * The Conrad/Voltcraft protocol descriptions have a typo (they suggest
 * index 0 for the 10A range (which is incorrect, it's range 1).
 */
static const int exponents[16][8] = {
	{ -5,   0,   0,   0,  0,  0,  0,  0 }, /* AC mV */
	{  0,  -4,  -3,  -2, -1,  0,  0,  0 }, /* DC V */
	{  0,  -4,  -3,  -2, -1,  0,  0,  0 }, /* AC V */
	{ -5,   0,   0,   0,  0,  0,  0,  0 }, /* DC mV */
	{  0,  -2,  -1,   0,  1,  2,  3,  0 }, /* Resistance */
	{  0, -12, -11, -10, -9, -8, -7, -6 }, /* Capacitance */
	{ -1,   0,   0,   0,  0,  0,  0,  0 }, /* Temp (C) */
	{ -8,  -7,   0,   0,  0,  0,  0,  0 }, /* uA */
	{ -6,  -5,   0,   0,  0,  0,  0,  0 }, /* mA */
	{  0,  -3,   0,   0,  0,  0,  0,  0 }, /* 10A */
	{ -1,   0,   0,   0,  0,  0,  0,  0 }, /* Continuity */
	{ -4,   0,   0,   0,  0,  0,  0,  0 }, /* Diode */
	{ -3,  -2,  -1,   0,  1,  2,  3,  4 }, /* Frequency */
	{ -1,   0,   0,   0,  0,  0,  0,  0 }, /* Temp (F) */
	{  0,   0,   0,   0,  0,  0,  0,  0 }, /* Power */
	{ -2,   0,   0,   0,  0,  0,  0,  0 }, /* Loop current */
};

static int parse_value(const uint8_t *buf, struct ut71x_info *info, float *result)
{
	int i, intval, num_digits = 5;

	/* Bytes 0-4: Value (5 decimal digits) */
	if (!strncmp((const char *)buf, "::0<:", 5)) {
		sr_spew("Over limit.");
		*result = INFINITY;
		return SR_OK;
	} else if (!strncmp((const char *)buf, ":<0::", 5)) {
		sr_spew("Under limit.");
		*result = INFINITY;
		return SR_OK;
	} else if (buf[4] == ':') {
		sr_dbg("4000 count mode, only 4 digits used.");
		num_digits = 4;
	} else if (!isdigit(buf[0]) || !isdigit(buf[1]) ||
	           !isdigit(buf[2]) || !isdigit(buf[3]) || !isdigit(buf[4])) {
		sr_dbg("Invalid digits: %02x %02x %02x %02x %02x (%c %c "
		       "%c %c %c).", buf[0], buf[1], buf[2], buf[3], buf[4],
		       buf[0], buf[1], buf[2], buf[3], buf[4]);
		return SR_ERR;
	}

	for (i = 0, intval = 0; i < num_digits; i++)
		intval = 10 * intval + (buf[i] - '0');

	/*
	 * For measurements that only have 4000 instead of 40000 counts
 	 * (resistance, continuity) we have to use an additional factor of 10.
 	 *
 	 * This seems to vary between DMMs. E.g. the Voltcraft VC920 and VC940
 	 * have 4000 counts for resistance, whereas the Tenma 72-9380A,
 	 * 72-7730 and 72-7732 have 40000 counts for resistance.
 	 */
	if (num_digits == 4)
		intval *= 10;

	/* Apply sign. */
	intval *= info->is_sign ? -1 : 1;

	/* Note: The decimal point position will be parsed later. */
	*result = (float)intval;
	sr_spew("The display value is %f.", *result);

	return SR_OK;
}

static int parse_range(const uint8_t *buf, float *floatval, int *exponent)
{
	int idx, mode;

	idx = buf[5] - '0';
	if (idx < 0 || idx > 7) {
		sr_dbg("Invalid range byte 0x%02x (idx 0x%02x).", buf[5], idx);
		return SR_ERR;
	}

	mode = buf[6] - '0';
	if (mode < 0 || mode > 15) {
		sr_dbg("Invalid mode byte 0x%02x (idx 0x%02x).", buf[6], mode);
		return SR_ERR;
	}

	sr_spew("mode/idx = %d/%d", mode, idx);

	*exponent = exponents[mode][idx];

	/* Apply respective exponent (mode-dependent) on the value. */
	*floatval *= powf(10, *exponent);
	sr_dbg("Applying exponent %d, new value is %g.", *exponent, *floatval);

	return SR_OK;
}

static void parse_flags(const uint8_t *buf, struct ut71x_info *info)
{
	/* Function byte */
	switch (buf[6] - '0') {
	case 0: /* AC mV */
		info->is_voltage = info->is_ac = TRUE;
		break;
	case 1: /* DC V */
		info->is_voltage = info->is_dc = TRUE;
		break;
	case 2: /* AC V */
		info->is_voltage = info->is_ac = TRUE;
		break;
	case 3: /* DC mV */
		info->is_voltage = info->is_dc = TRUE;
		break;
	case 4: /* Resistance */
		info->is_resistance = TRUE;
		break;
	case 5: /* Capacitance */
		info->is_capacitance = TRUE;
		break;
	case 6: /* Temperature (Celsius) */
		info->is_temperature = info->is_celsius = TRUE;
		break;
	case 7: /* uA */
		info->is_current = info->is_dc = TRUE;
		break;
	case 8: /* mA */
		info->is_current = info->is_dc = TRUE;
		break;
	case 9: /* 10A */
		info->is_current = info->is_dc = TRUE;
		break;
	case 10: /* Continuity */
		info->is_continuity = TRUE;
		break;
	case 11: /* Diode */
		info->is_diode = TRUE;
		break;
	case 12: /* Frequency */
		info->is_frequency = TRUE;
		break;
	case 13: /* Temperature (F) */
		info->is_temperature = info->is_fahrenheit = TRUE;
		break;
	case 14: /* Power */
		/* Note: Only available on UT71E (range 0-2500W). */
		info->is_power = TRUE;
		break;
	case 15: /* DC loop current, percentage display (range 4-20mA) */
		info->is_loop_current = TRUE;
		break;
	default:
		sr_dbg("Invalid function byte: 0x%02x.", buf[6]);
		break;
	}

	/*
	 * State 1 byte: bit 0 = AC, bit 1 = DC
	 * Either AC or DC or both or none can be set at the same time.
	 */
	info->is_ac = (buf[7] & (1 << 0)) != 0;
	info->is_dc = (buf[7] & (1 << 1)) != 0;

	/*
	 * State 2 byte: bit 0 = auto, bit 1 = manual, bit 2 = sign
	 *
	 * The Conrad/Voltcraft protocol descriptions have a typo
	 * (they suggest bit 3 as sign bit, which is incorrect).
	 *
	 * For modes where there's only one possible range (e.g. AC mV)
	 * neither the "auto" nor the "manual" bits will be set.
	 */
	info->is_auto   = (buf[8] & (1 << 0)) != 0;
	info->is_manual = (buf[8] & (1 << 1)) != 0;
	info->is_sign   = (buf[8] & (1 << 2)) != 0;

	/* Note: "Frequency mode + sign bit" means "duty cycle mode". */
	if (info->is_frequency && info->is_sign) {
		info->is_duty_cycle = TRUE;
		info->is_frequency = info->is_sign = FALSE;
	}
}

static void handle_flags(struct sr_datafeed_analog *analog,
		float *floatval, const struct ut71x_info *info)
{
	/* Measurement modes */
	if (info->is_voltage) {
		analog->meaning->mq = SR_MQ_VOLTAGE;
		analog->meaning->unit = SR_UNIT_VOLT;
	}
	if (info->is_current) {
		analog->meaning->mq = SR_MQ_CURRENT;
		analog->meaning->unit = SR_UNIT_AMPERE;
	}
	if (info->is_resistance) {
		analog->meaning->mq = SR_MQ_RESISTANCE;
		analog->meaning->unit = SR_UNIT_OHM;
	}
	if (info->is_frequency) {
		analog->meaning->mq = SR_MQ_FREQUENCY;
		analog->meaning->unit = SR_UNIT_HERTZ;
	}
	if (info->is_capacitance) {
		analog->meaning->mq = SR_MQ_CAPACITANCE;
		analog->meaning->unit = SR_UNIT_FARAD;
	}
	if (info->is_temperature && info->is_celsius) {
		analog->meaning->mq = SR_MQ_TEMPERATURE;
		analog->meaning->unit = SR_UNIT_CELSIUS;
	}
	if (info->is_temperature && info->is_fahrenheit) {
		analog->meaning->mq = SR_MQ_TEMPERATURE;
		analog->meaning->unit = SR_UNIT_FAHRENHEIT;
	}
	if (info->is_continuity) {
		analog->meaning->mq = SR_MQ_CONTINUITY;
		analog->meaning->unit = SR_UNIT_BOOLEAN;
		*floatval = (*floatval < 0.0 || *floatval > 60.0) ? 0.0 : 1.0;
	}
	if (info->is_diode) {
		analog->meaning->mq = SR_MQ_VOLTAGE;
		analog->meaning->unit = SR_UNIT_VOLT;
	}
	if (info->is_duty_cycle) {
		analog->meaning->mq = SR_MQ_DUTY_CYCLE;
		analog->meaning->unit = SR_UNIT_PERCENTAGE;
	}
	if (info->is_power) {
		analog->meaning->mq = SR_MQ_POWER;
		analog->meaning->unit = SR_UNIT_WATT;
	}
	if (info->is_loop_current) {
		/* 4mA = 0%, 20mA = 100% */
		analog->meaning->mq = SR_MQ_CURRENT;
		analog->meaning->unit = SR_UNIT_PERCENTAGE;
	}

	/* Measurement related flags */
	if (info->is_ac)
		analog->meaning->mqflags |= SR_MQFLAG_AC;
	if (info->is_dc)
		analog->meaning->mqflags |= SR_MQFLAG_DC;
	if (info->is_ac)
		/* All AC modes do True-RMS measurements. */
		analog->meaning->mqflags |= SR_MQFLAG_RMS;
	if (info->is_auto)
		analog->meaning->mqflags |= SR_MQFLAG_AUTORANGE;
	if (info->is_diode)
		analog->meaning->mqflags |= SR_MQFLAG_DIODE;
}

static gboolean flags_valid(const struct ut71x_info *info)
{
	int count;

	/* Does the packet "measure" more than one type of value? */
	count  = (info->is_voltage) ? 1 : 0;
	count += (info->is_current) ? 1 : 0;
	count += (info->is_resistance) ? 1 : 0;
	count += (info->is_capacitance) ? 1 : 0;
	count += (info->is_frequency) ? 1 : 0;
	count += (info->is_temperature) ? 1 : 0;
	count += (info->is_continuity) ? 1 : 0;
	count += (info->is_diode) ? 1 : 0;
	count += (info->is_power) ? 1 : 0;
	count += (info->is_loop_current) ? 1 : 0;
	if (count > 1) {
		sr_dbg("More than one measurement type detected in packet.");
		return FALSE;
	}

	/* Auto and manual can't be active at the same time. */
	if (info->is_auto && info->is_manual) {
		sr_dbg("Auto and manual modes are both active.");
		return FALSE;
	}

	return TRUE;
}

SR_PRIV gboolean sr_ut71x_packet_valid(const uint8_t *buf)
{
	struct ut71x_info info;

	memset(&info, 0, sizeof(struct ut71x_info));

	if (buf[9] != '\r' || buf[10] != '\n')
		return FALSE;

	parse_flags(buf, &info);

	return flags_valid(&info);
}

SR_PRIV int sr_ut71x_parse(const uint8_t *buf, float *floatval,
		struct sr_datafeed_analog *analog, void *info)
{
	int ret, exponent = 0;
	struct ut71x_info *info_local;

	info_local = (struct ut71x_info *)info;
	memset(info_local, 0, sizeof(struct ut71x_info));

	if (!sr_ut71x_packet_valid(buf))
		return SR_ERR;

	parse_flags(buf, info_local);

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

	if ((ret = parse_range(buf, floatval, &exponent)) != SR_OK)
		return ret;

	handle_flags(analog, floatval, info);

	analog->encoding->digits = -exponent;
	analog->spec->spec_digits = -exponent;

	return SR_OK;
}
Commit	Line	Data
626027df UH	1	/*
	2	* This file is part of the libsigrok project.
	3	*
	4	* Copyright (C) 2014 Uwe Hermann <uwe@hermann-uwe.de>
	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
2ea1fdf1	17	* along with this program; if not, see <http://www.gnu.org/licenses/>.
626027df UH	18	*/
	19
	20	/*
	21	* UNI-T UT71x protocol parser.
	22	*
	23	* Communication parameters: Unidirectional, 2400/7o1
	24	*/
	25
6ec6c43b	26	#include <config.h>
626027df UH	27	#include <string.h>
	28	#include <ctype.h>
	29	#include <math.h>
	30	#include <glib.h>
c1aae900	31	#include <libsigrok/libsigrok.h>
626027df UH	32	#include "libsigrok-internal.h"
	33
	34	#define LOG_PREFIX "ut71x"
	35
	36	/*
4f414d4c	37	* Exponents for the respective measurement mode.
626027df UH	38	*
	39	* The Conrad/Voltcraft protocol descriptions have a typo (they suggest
	40	* index 0 for the 10A range (which is incorrect, it's range 1).
	41	*/
4f414d4c AJ	42	static const int exponents[16][8] = {
	43	{ -5, 0, 0, 0, 0, 0, 0, 0 }, /* AC mV */
	44	{ 0, -4, -3, -2, -1, 0, 0, 0 }, /* DC V */
	45	{ 0, -4, -3, -2, -1, 0, 0, 0 }, /* AC V */
	46	{ -5, 0, 0, 0, 0, 0, 0, 0 }, /* DC mV */
45fcaf2c	47	{ 0, -2, -1, 0, 1, 2, 3, 0 }, /* Resistance */
4f414d4c AJ	48	{ 0, -12, -11, -10, -9, -8, -7, -6 }, /* Capacitance */
	49	{ -1, 0, 0, 0, 0, 0, 0, 0 }, /* Temp (C) */
	50	{ -8, -7, 0, 0, 0, 0, 0, 0 }, /* uA */
	51	{ -6, -5, 0, 0, 0, 0, 0, 0 }, /* mA */
	52	{ 0, -3, 0, 0, 0, 0, 0, 0 }, /* 10A */
	53	{ -1, 0, 0, 0, 0, 0, 0, 0 }, /* Continuity */
	54	{ -4, 0, 0, 0, 0, 0, 0, 0 }, /* Diode */
	55	{ -3, -2, -1, 0, 1, 2, 3, 4 }, /* Frequency */
	56	{ -1, 0, 0, 0, 0, 0, 0, 0 }, /* Temp (F) */
	57	{ 0, 0, 0, 0, 0, 0, 0, 0 }, /* Power */
	58	{ -2, 0, 0, 0, 0, 0, 0, 0 }, /* Loop current */
626027df UH	59	};
	60
	61	static int parse_value(const uint8_t buf, struct ut71x_info info, float *result)
	62	{
	63	int i, intval, num_digits = 5;
	64
	65	/* Bytes 0-4: Value (5 decimal digits) */
	66	if (!strncmp((const char *)buf, "::0<:", 5)) {
	67	sr_spew("Over limit.");
	68	*result = INFINITY;
	69	return SR_OK;
	70	} else if (!strncmp((const char *)buf, ":<0::", 5)) {
	71	sr_spew("Under limit.");
	72	*result = INFINITY;
	73	return SR_OK;
	74	} else if (buf[4] == ':') {
	75	sr_dbg("4000 count mode, only 4 digits used.");
	76	num_digits = 4;
	77	} else if (!isdigit(buf[0]) \|\| !isdigit(buf[1]) \|\|
	78	!isdigit(buf[2]) \|\| !isdigit(buf[3]) \|\| !isdigit(buf[4])) {
	79	sr_dbg("Invalid digits: %02x %02x %02x %02x %02x (%c %c "
	80	"%c %c %c).", buf[0], buf[1], buf[2], buf[3], buf[4],
	81	buf[0], buf[1], buf[2], buf[3], buf[4]);
	82	return SR_ERR;
	83	}
45fcaf2c	84
626027df UH	85	for (i = 0, intval = 0; i < num_digits; i++)
	86	intval = 10 * intval + (buf[i] - '0');
	87
45fcaf2c UH	88	/*
	89	* For measurements that only have 4000 instead of 40000 counts
	90	* (resistance, continuity) we have to use an additional factor of 10.
	91	*
	92	* This seems to vary between DMMs. E.g. the Voltcraft VC920 and VC940
	93	* have 4000 counts for resistance, whereas the Tenma 72-9380A,
	94	* 72-7730 and 72-7732 have 40000 counts for resistance.
	95	*/
	96	if (num_digits == 4)
	97	intval *= 10;
	98
626027df UH	99	/* Apply sign. */
	100	intval *= info->is_sign ? -1 : 1;
	101
	102	/* Note: The decimal point position will be parsed later. */
	103	*result = (float)intval;
	104	sr_spew("The display value is %f.", *result);
	105
	106	return SR_OK;
	107	}
	108
4f414d4c	109	static int parse_range(const uint8_t buf, float floatval, int *exponent)
626027df UH	110	{
626027df UH	111	int idx, mode;
626027df UH	112
	113	idx = buf[5] - '0';
	114	if (idx < 0 \|\| idx > 7) {
	115	sr_dbg("Invalid range byte 0x%02x (idx 0x%02x).", buf[5], idx);
	116	return SR_ERR;
	117	}
	118
	119	mode = buf[6] - '0';
	120	if (mode < 0 \|\| mode > 15) {
	121	sr_dbg("Invalid mode byte 0x%02x (idx 0x%02x).", buf[6], mode);
	122	return SR_ERR;
	123	}
	124
	125	sr_spew("mode/idx = %d/%d", mode, idx);
	126
4f414d4c	127	*exponent = exponents[mode][idx];
626027df	128
4f414d4c AJ	129	/* Apply respective exponent (mode-dependent) on the value. */
4f414d4c AJ	130	floatval = powf(10, *exponent);
2b17aeb8	131	sr_dbg("Applying exponent %d, new value is %g.", exponent, floatval);
626027df UH	132
	133	return SR_OK;
	134	}
	135
	136	static void parse_flags(const uint8_t buf, struct ut71x_info info)
	137	{
	138	/* Function byte */
	139	switch (buf[6] - '0') {
	140	case 0: /* AC mV */
	141	info->is_voltage = info->is_ac = TRUE;
	142	break;
	143	case 1: /* DC V */
	144	info->is_voltage = info->is_dc = TRUE;
	145	break;
	146	case 2: /* AC V */
	147	info->is_voltage = info->is_ac = TRUE;
	148	break;
	149	case 3: /* DC mV */
	150	info->is_voltage = info->is_dc = TRUE;
	151	break;
	152	case 4: /* Resistance */
	153	info->is_resistance = TRUE;
	154	break;
	155	case 5: /* Capacitance */
	156	info->is_capacitance = TRUE;
	157	break;
	158	case 6: /* Temperature (Celsius) */
	159	info->is_temperature = info->is_celsius = TRUE;
	160	break;
	161	case 7: /* uA */
	162	info->is_current = info->is_dc = TRUE;
	163	break;
	164	case 8: /* mA */
	165	info->is_current = info->is_dc = TRUE;
	166	break;
	167	case 9: /* 10A */
	168	info->is_current = info->is_dc = TRUE;
	169	break;
	170	case 10: /* Continuity */
	171	info->is_continuity = TRUE;
	172	break;
	173	case 11: /* Diode */
	174	info->is_diode = TRUE;
	175	break;
	176	case 12: /* Frequency */
	177	info->is_frequency = TRUE;
	178	break;
	179	case 13: /* Temperature (F) */
	180	info->is_temperature = info->is_fahrenheit = TRUE;
	181	break;
	182	case 14: /* Power */
	183	/* Note: Only available on UT71E (range 0-2500W). */
	184	info->is_power = TRUE;
	185	break;
	186	case 15: /* DC loop current, percentage display (range 4-20mA) */
	187	info->is_loop_current = TRUE;
	188	break;
	189	default:
	190	sr_dbg("Invalid function byte: 0x%02x.", buf[6]);
	191	break;
	192	}
	193
	194	/*
	195	* State 1 byte: bit 0 = AC, bit 1 = DC
196	* Either AC or DC or both or none can be set at the same time.
197	*/
198	info->is_ac = (buf[7] & (1 << 0)) != 0;
199	info->is_dc = (buf[7] & (1 << 1)) != 0;
200
201	/*
202	* State 2 byte: bit 0 = auto, bit 1 = manual, bit 2 = sign
203	*
204	* The Conrad/Voltcraft protocol descriptions have a typo
205	* (they suggest bit 3 as sign bit, which is incorrect).
206	*
207	* For modes where there's only one possible range (e.g. AC mV)
208	* neither the "auto" nor the "manual" bits will be set.
209	*/
210	info->is_auto = (buf[8] & (1 << 0)) != 0;
211	info->is_manual = (buf[8] & (1 << 1)) != 0;
212	info->is_sign = (buf[8] & (1 << 2)) != 0;
213
214	/* Note: "Frequency mode + sign bit" means "duty cycle mode". */
215	if (info->is_frequency && info->is_sign) {
216	info->is_duty_cycle = TRUE;
217	info->is_frequency = info->is_sign = FALSE;
218	}
219	}
220
b02bb45f	221	static void handle_flags(struct sr_datafeed_analog *analog,
626027df UH	222	float floatval, const struct ut71x_info info)
	223	{
	224	/* Measurement modes */
	225	if (info->is_voltage) {
b02bb45f UH	226	analog->meaning->mq = SR_MQ_VOLTAGE;
b02bb45f UH	227	analog->meaning->unit = SR_UNIT_VOLT;
626027df UH	228	}
626027df UH	229	if (info->is_current) {
b02bb45f UH	230	analog->meaning->mq = SR_MQ_CURRENT;
b02bb45f UH	231	analog->meaning->unit = SR_UNIT_AMPERE;
626027df UH	232	}
626027df UH	233	if (info->is_resistance) {
b02bb45f UH	234	analog->meaning->mq = SR_MQ_RESISTANCE;
b02bb45f UH	235	analog->meaning->unit = SR_UNIT_OHM;
626027df UH	236	}
626027df UH	237	if (info->is_frequency) {
b02bb45f UH	238	analog->meaning->mq = SR_MQ_FREQUENCY;
b02bb45f UH	239	analog->meaning->unit = SR_UNIT_HERTZ;
626027df UH	240	}
626027df UH	241	if (info->is_capacitance) {
b02bb45f UH	242	analog->meaning->mq = SR_MQ_CAPACITANCE;
b02bb45f UH	243	analog->meaning->unit = SR_UNIT_FARAD;
626027df UH	244	}
626027df UH	245	if (info->is_temperature && info->is_celsius) {
b02bb45f UH	246	analog->meaning->mq = SR_MQ_TEMPERATURE;
b02bb45f UH	247	analog->meaning->unit = SR_UNIT_CELSIUS;
626027df UH	248	}
626027df UH	249	if (info->is_temperature && info->is_fahrenheit) {
b02bb45f UH	250	analog->meaning->mq = SR_MQ_TEMPERATURE;
b02bb45f UH	251	analog->meaning->unit = SR_UNIT_FAHRENHEIT;
626027df UH	252	}
626027df UH	253	if (info->is_continuity) {
b02bb45f UH	254	analog->meaning->mq = SR_MQ_CONTINUITY;
b02bb45f UH	255	analog->meaning->unit = SR_UNIT_BOOLEAN;
626027df UH	256	floatval = (floatval < 0.0 \|\| *floatval > 60.0) ? 0.0 : 1.0;
	257	}
	258	if (info->is_diode) {
b02bb45f UH	259	analog->meaning->mq = SR_MQ_VOLTAGE;
b02bb45f UH	260	analog->meaning->unit = SR_UNIT_VOLT;
626027df UH	261	}
626027df UH	262	if (info->is_duty_cycle) {
b02bb45f UH	263	analog->meaning->mq = SR_MQ_DUTY_CYCLE;
b02bb45f UH	264	analog->meaning->unit = SR_UNIT_PERCENTAGE;
626027df UH	265	}
626027df UH	266	if (info->is_power) {
b02bb45f UH	267	analog->meaning->mq = SR_MQ_POWER;
b02bb45f UH	268	analog->meaning->unit = SR_UNIT_WATT;
626027df UH	269	}
	270	if (info->is_loop_current) {
	271	/* 4mA = 0%, 20mA = 100% */
b02bb45f UH	272	analog->meaning->mq = SR_MQ_CURRENT;
b02bb45f UH	273	analog->meaning->unit = SR_UNIT_PERCENTAGE;
626027df UH	274	}
	275
	276	/* Measurement related flags */
	277	if (info->is_ac)
b02bb45f	278	analog->meaning->mqflags \|= SR_MQFLAG_AC;
626027df	279	if (info->is_dc)
b02bb45f	280	analog->meaning->mqflags \|= SR_MQFLAG_DC;
626027df UH	281	if (info->is_ac)
626027df UH	282	/* All AC modes do True-RMS measurements. */
b02bb45f	283	analog->meaning->mqflags \|= SR_MQFLAG_RMS;
626027df	284	if (info->is_auto)
b02bb45f	285	analog->meaning->mqflags \|= SR_MQFLAG_AUTORANGE;
626027df	286	if (info->is_diode)
b02bb45f	287	analog->meaning->mqflags \|= SR_MQFLAG_DIODE;
626027df UH	288	}
	289
	290	static gboolean flags_valid(const struct ut71x_info *info)
	291	{
	292	int count;
	293
	294	/* Does the packet "measure" more than one type of value? */
	295	count = (info->is_voltage) ? 1 : 0;
	296	count += (info->is_current) ? 1 : 0;
	297	count += (info->is_resistance) ? 1 : 0;
	298	count += (info->is_capacitance) ? 1 : 0;
	299	count += (info->is_frequency) ? 1 : 0;
	300	count += (info->is_temperature) ? 1 : 0;
	301	count += (info->is_continuity) ? 1 : 0;
	302	count += (info->is_diode) ? 1 : 0;
	303	count += (info->is_power) ? 1 : 0;
	304	count += (info->is_loop_current) ? 1 : 0;
	305	if (count > 1) {
	306	sr_dbg("More than one measurement type detected in packet.");
	307	return FALSE;
	308	}
	309
	310	/* Auto and manual can't be active at the same time. */
	311	if (info->is_auto && info->is_manual) {
	312	sr_dbg("Auto and manual modes are both active.");
	313	return FALSE;
	314	}
	315
	316	return TRUE;
	317	}
	318
	319	SR_PRIV gboolean sr_ut71x_packet_valid(const uint8_t *buf)
	320	{
	321	struct ut71x_info info;
	322
	323	memset(&info, 0, sizeof(struct ut71x_info));
	324
	325	if (buf[9] != '\r' \|\| buf[10] != '\n')
	326	return FALSE;
	327
	328	parse_flags(buf, &info);
	329
	330	return flags_valid(&info);
	331	}
	332
	333	SR_PRIV int sr_ut71x_parse(const uint8_t buf, float floatval,
b02bb45f	334	struct sr_datafeed_analog analog, void info)
626027df	335	{
4f414d4c	336	int ret, exponent = 0;
626027df UH	337	struct ut71x_info *info_local;
	338
	339	info_local = (struct ut71x_info *)info;
	340	memset(info_local, 0, sizeof(struct ut71x_info));
	341
	342	if (!sr_ut71x_packet_valid(buf))
	343	return SR_ERR;
	344
	345	parse_flags(buf, info_local);
	346
	347	if ((ret = parse_value(buf, info, floatval)) != SR_OK) {
	348	sr_dbg("Error parsing value: %d.", ret);
	349	return ret;
	350	}
	351
4f414d4c	352	if ((ret = parse_range(buf, floatval, &exponent)) != SR_OK)
626027df UH	353	return ret;
	354
	355	handle_flags(analog, floatval, info);
	356
d9251a2c	357	analog->encoding->digits = -exponent;
4f414d4c AJ	358	analog->spec->spec_digits = -exponent;
4f414d4c AJ	359
626027df UH	360	return SR_OK;
626027df UH	361	}