[libsigrok.git] / src / lcr / es51919.c

/*
 * This file is part of the libsigrok project.
 *
 * Copyright (C) 2014 Janne Huttunen <jahuttun@gmail.com>
 * Copyright (C) 2019 Gerhard Sittig <gerhard.sittig@gmx.net>
 *
 * 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 <config.h>
#include <glib.h>
#include <libsigrok/libsigrok.h>
#include "libsigrok-internal.h"
#include <math.h>
#include <stdint.h>
#include <string.h>

#define LOG_PREFIX "es51919"

#ifdef HAVE_SERIAL_COMM

/*
 * Cyrustek ES51919 LCR chipset host protocol.
 *
 * Public official documentation does not contain the protocol
 * description, so this is all based on reverse engineering.
 *
 * Packet structure (17 bytes):
 *
 * 0x00: header1 ?? (0x00)
 * 0x01: header2 ?? (0x0d)
 *
 * 0x02: flags
 *         bit 0 = hold enabled
 *         bit 1 = reference shown (in delta mode)
 *         bit 2 = delta mode
 *         bit 3 = calibration mode
 *         bit 4 = sorting mode
 *         bit 5 = LCR mode
 *         bit 6 = auto mode
 *         bit 7 = parallel measurement (vs. serial)
 *
 * 0x03: config
 *         bit 0-4 = ??? (0x10)
 *         bit 5-7 = test frequency
 *                     0 = 100 Hz
 *                     1 = 120 Hz
 *                     2 = 1 kHz
 *                     3 = 10 kHz
 *                     4 = 100 kHz
 *                     5 = 0 Hz (DC)
 *
 * 0x04: tolerance (sorting mode)
 *         0 = not set
 *         3 = +-0.25%
 *         4 = +-0.5%
 *         5 = +-1%
 *         6 = +-2%
 *         7 = +-5%
 *         8 = +-10%
 *         9 = +-20%
 *        10 = -20+80%
 *
 * 0x05-0x09: primary measurement
 *   0x05: measured quantity
 *           1 = inductance
 *           2 = capacitance
 *           3 = resistance
 *           4 = DC resistance
 *   0x06: measurement MSB  (0x4e20 = 20000 = outside limits)
 *   0x07: measurement LSB
 *   0x08: measurement info
 *           bit 0-2 = decimal point multiplier (10^-val)
 *           bit 3-7 = unit
 *                       0 = no unit
 *                       1 = Ohm
 *                       2 = kOhm
 *                       3 = MOhm
 *                       5 = uH
 *                       6 = mH
 *                       7 = H
 *                       8 = kH
 *                       9 = pF
 *                       10 = nF
 *                       11 = uF
 *                       12 = mF
 *                       13 = %
 *                       14 = degree
 *   0x09: measurement status
 *           bit 0-3 = status
 *                       0 = normal (measurement shown)
 *                       1 = blank (nothing shown)
 *                       2 = lines ("----")
 *                       3 = outside limits ("OL")
 *                       7 = pass ("PASS")
 *                       8 = fail ("FAIL")
 *                       9 = open ("OPEn")
 *                      10 = shorted ("Srt")
 *           bit 4-6 = ??? (maybe part of same field with 0-3)
 *           bit 7   = ??? (some independent flag)
 *
 * 0x0a-0x0e: secondary measurement
 *   0x0a: measured quantity
 *           0 = none
 *           1 = dissipation factor
 *           2 = quality factor
 *           3 = parallel AC resistance / ESR
 *           4 = phase angle
 *   0x0b-0x0e: like primary measurement
 *
 * 0x0f: footer1 (0x0d) ?
 * 0x10: footer2 (0x0a) ?
 */

static const double frequencies[] = {
	SR_HZ(0), SR_HZ(100), SR_HZ(120),
	SR_KHZ(1), SR_KHZ(10), SR_KHZ(100),
};

static const size_t freq_code_map[] = {
	1, 2, 3, 4, 5, 0,
};

static uint64_t get_frequency(size_t code)
{
	uint64_t freq;

	if (code >= ARRAY_SIZE(freq_code_map)) {
		sr_err("Unknown output frequency code %zu.", code);
		return frequencies[0];
	}

	code = freq_code_map[code];
	freq = frequencies[code];

	return freq;
}

enum { MODEL_NONE, MODEL_PAR, MODEL_SER, MODEL_AUTO, };

static const char *const circuit_models[] = {
	"NONE", "PARALLEL", "SERIES", "AUTO",
};

static const char *get_equiv_model(size_t code)
{
	if (code >= ARRAY_SIZE(circuit_models)) {
		sr_err("Unknown equivalent circuit model code %zu.", code);
		return "NONE";
	}

	return circuit_models[code];
}

static const uint8_t *pkt_to_buf(const uint8_t *pkt, int is_secondary)
{
	return is_secondary ? pkt + 10 : pkt + 5;
}

static int parse_mq(const uint8_t *pkt, int is_secondary, int is_parallel)
{
	const uint8_t *buf;

	buf = pkt_to_buf(pkt, is_secondary);

	switch (is_secondary << 8 | buf[0]) {
	case 0x001:
		return is_parallel ?
			SR_MQ_PARALLEL_INDUCTANCE : SR_MQ_SERIES_INDUCTANCE;
	case 0x002:
		return is_parallel ?
			SR_MQ_PARALLEL_CAPACITANCE : SR_MQ_SERIES_CAPACITANCE;
	case 0x003:
	case 0x103:
		return is_parallel ?
			SR_MQ_PARALLEL_RESISTANCE : SR_MQ_SERIES_RESISTANCE;
	case 0x004:
		return SR_MQ_RESISTANCE;
	case 0x100:
		return SR_MQ_DIFFERENCE;
	case 0x101:
		return SR_MQ_DISSIPATION_FACTOR;
	case 0x102:
		return SR_MQ_QUALITY_FACTOR;
	case 0x104:
		return SR_MQ_PHASE_ANGLE;
	}

	sr_err("Unknown quantity 0x%03x.", is_secondary << 8 | buf[0]);

	return 0;
}

static float parse_value(const uint8_t *buf, int *digits)
{
	static const int exponents[] = {0, -1, -2, -3, -4, -5, -6, -7};

	int exponent;
	int16_t val;
	float fval;

	exponent = exponents[buf[3] & 7];
	*digits = -exponent;
	val = (buf[1] << 8) | buf[2];
	fval = (float)val;
	fval *= powf(10, exponent);

	return fval;
}

static void parse_measurement(const uint8_t *pkt, float *floatval,
	struct sr_datafeed_analog *analog, int is_secondary)
{
	static const struct {
		int unit;
		int exponent;
	} units[] = {
		{ SR_UNIT_UNITLESS,   0 }, /* no unit */
		{ SR_UNIT_OHM,        0 }, /* Ohm */
		{ SR_UNIT_OHM,        3 }, /* kOhm */
		{ SR_UNIT_OHM,        6 }, /* MOhm */
		{ -1,                 0 }, /* ??? */
		{ SR_UNIT_HENRY,     -6 }, /* uH */
		{ SR_UNIT_HENRY,     -3 }, /* mH */
		{ SR_UNIT_HENRY,      0 }, /* H */
		{ SR_UNIT_HENRY,      3 }, /* kH */
		{ SR_UNIT_FARAD,    -12 }, /* pF */
		{ SR_UNIT_FARAD,     -9 }, /* nF */
		{ SR_UNIT_FARAD,     -6 }, /* uF */
		{ SR_UNIT_FARAD,     -3 }, /* mF */
		{ SR_UNIT_PERCENTAGE, 0 }, /* % */
		{ SR_UNIT_DEGREE,     0 }, /* degree */
	};

	const uint8_t *buf;
	int digits, exponent;
	int state;

	buf = pkt_to_buf(pkt, is_secondary);

	analog->meaning->mq = 0;
	analog->meaning->mqflags = 0;

	state = buf[4] & 0xf;

	if (state != 0 && state != 3)
		return;

	if (pkt[2] & 0x18) {
		/* Calibration and Sorting modes not supported. */
		return;
	}

	if (!is_secondary) {
		if (pkt[2] & 0x01)
			analog->meaning->mqflags |= SR_MQFLAG_HOLD;
		if (pkt[2] & 0x02)
			analog->meaning->mqflags |= SR_MQFLAG_REFERENCE;
	} else {
		if (pkt[2] & 0x04)
			analog->meaning->mqflags |= SR_MQFLAG_RELATIVE;
	}

	if ((analog->meaning->mq = parse_mq(pkt, is_secondary, pkt[2] & 0x80)) == 0)
		return;

	if ((buf[3] >> 3) >= ARRAY_SIZE(units)) {
		sr_err("Unknown unit %u.", buf[3] >> 3);
		analog->meaning->mq = 0;
		return;
	}

	analog->meaning->unit = units[buf[3] >> 3].unit;

	exponent = units[buf[3] >> 3].exponent;
	*floatval = parse_value(buf, &digits);
	*floatval *= (state == 0) ? powf(10, exponent) : INFINITY;
	analog->encoding->digits = digits - exponent;
	analog->spec->spec_digits = digits - exponent;
}

static uint64_t parse_freq(const uint8_t *pkt)
{
	return get_frequency(pkt[3] >> 5);
}

static const char *parse_model(const uint8_t *pkt)
{
	size_t code;

	if (pkt[2] & 0x40)
		code = MODEL_AUTO;
	else if (parse_mq(pkt, 0, 0) == SR_MQ_RESISTANCE)
		code = MODEL_NONE;
	else
		code = (pkt[2] & 0x80) ? MODEL_PAR : MODEL_SER;

	return get_equiv_model(code);
}

SR_PRIV gboolean es51919_packet_valid(const uint8_t *pkt)
{

	/* Check for fixed 0x00 0x0d prefix. */
	if (pkt[0] != 0x00 || pkt[1] != 0x0d)
		return FALSE;

	/* Check for fixed 0x0d 0x0a suffix. */
	if (pkt[15] != 0x0d || pkt[16] != 0x0a)
		return FALSE;

	/* Packet appears to be valid. */
	return TRUE;
}

SR_PRIV int es51919_packet_parse(const uint8_t *pkt, float *val,
	struct sr_datafeed_analog *analog, void *info)
{
	struct lcr_parse_info *parse_info;

	parse_info = info;
	if (!parse_info->ch_idx) {
		parse_info->output_freq = parse_freq(pkt);
		parse_info->circuit_model = parse_model(pkt);
	}
	if (val && analog)
		parse_measurement(pkt, val, analog, parse_info->ch_idx == 1);

	return SR_OK;
}

/*
 * These are the get/set/list routines for the _chip_ specific parameters,
 * the _device_ driver resides in src/hardware/serial-lcr/ instead.
 */

SR_PRIV int es51919_config_list(uint32_t key, GVariant **data,
	const struct sr_dev_inst *sdi, const struct sr_channel_group *cg)
{

	(void)sdi;
	(void)cg;

	switch (key) {
	case SR_CONF_OUTPUT_FREQUENCY:
		*data = g_variant_new_fixed_array(G_VARIANT_TYPE_DOUBLE,
			ARRAY_AND_SIZE(frequencies), sizeof(frequencies[0]));
		return SR_OK;
	case SR_CONF_EQUIV_CIRCUIT_MODEL:
		*data = g_variant_new_strv(ARRAY_AND_SIZE(circuit_models));
		return SR_OK;
	default:
		return SR_ERR_NA;
	}
	/* UNREACH */
}

#endif
Commit	Line	Data
	1	/*
	2	* This file is part of the libsigrok project.
	3	*
	4	* Copyright (C) 2014 Janne Huttunen <jahuttun@gmail.com>
	5	* Copyright (C) 2019 Gerhard Sittig <gerhard.sittig@gmx.net>
	6	*
	7	* This program is free software: you can redistribute it and/or modify
	8	* it under the terms of the GNU General Public License as published by
	9	* the Free Software Foundation, either version 3 of the License, or
	10	* (at your option) any later version.
	11	*
	12	* This program is distributed in the hope that it will be useful,
	13	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	14	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	15	* GNU General Public License for more details.
	16	*
	17	* You should have received a copy of the GNU General Public License
	18	* along with this program. If not, see <http://www.gnu.org/licenses/>.
	19	*/
	20
	21	#include <config.h>
	22	#include <glib.h>
	23	#include <libsigrok/libsigrok.h>
	24	#include "libsigrok-internal.h"
	25	#include <math.h>
	26	#include <stdint.h>
	27	#include <string.h>
	28
	29	#define LOG_PREFIX "es51919"
	30
	31	#ifdef HAVE_SERIAL_COMM
	32
	33	/*
	34	* Cyrustek ES51919 LCR chipset host protocol.
	35	*
	36	* Public official documentation does not contain the protocol
	37	* description, so this is all based on reverse engineering.
	38	*
	39	* Packet structure (17 bytes):
	40	*
	41	* 0x00: header1 ?? (0x00)
	42	* 0x01: header2 ?? (0x0d)
	43	*
	44	* 0x02: flags
	45	* bit 0 = hold enabled
	46	* bit 1 = reference shown (in delta mode)
	47	* bit 2 = delta mode
	48	* bit 3 = calibration mode
	49	* bit 4 = sorting mode
	50	* bit 5 = LCR mode
	51	* bit 6 = auto mode
	52	* bit 7 = parallel measurement (vs. serial)
	53	*
	54	* 0x03: config
	55	* bit 0-4 = ??? (0x10)
	56	* bit 5-7 = test frequency
	57	* 0 = 100 Hz
	58	* 1 = 120 Hz
	59	* 2 = 1 kHz
	60	* 3 = 10 kHz
	61	* 4 = 100 kHz
	62	* 5 = 0 Hz (DC)
	63	*
	64	* 0x04: tolerance (sorting mode)
	65	* 0 = not set
	66	* 3 = +-0.25%
	67	* 4 = +-0.5%
	68	* 5 = +-1%
	69	* 6 = +-2%
	70	* 7 = +-5%
	71	* 8 = +-10%
	72	* 9 = +-20%
	73	* 10 = -20+80%
	74	*
	75	* 0x05-0x09: primary measurement
	76	* 0x05: measured quantity
	77	* 1 = inductance
	78	* 2 = capacitance
	79	* 3 = resistance
	80	* 4 = DC resistance
	81	* 0x06: measurement MSB (0x4e20 = 20000 = outside limits)
	82	* 0x07: measurement LSB
	83	* 0x08: measurement info
	84	* bit 0-2 = decimal point multiplier (10^-val)
	85	* bit 3-7 = unit
	86	* 0 = no unit
	87	* 1 = Ohm
	88	* 2 = kOhm
	89	* 3 = MOhm
	90	* 5 = uH
	91	* 6 = mH
	92	* 7 = H
	93	* 8 = kH
	94	* 9 = pF
	95	* 10 = nF
	96	* 11 = uF
	97	* 12 = mF
	98	* 13 = %
	99	* 14 = degree
	100	* 0x09: measurement status
	101	* bit 0-3 = status
	102	* 0 = normal (measurement shown)
	103	* 1 = blank (nothing shown)
	104	* 2 = lines ("----")
	105	* 3 = outside limits ("OL")
	106	* 7 = pass ("PASS")
	107	* 8 = fail ("FAIL")
	108	* 9 = open ("OPEn")
	109	* 10 = shorted ("Srt")
	110	* bit 4-6 = ??? (maybe part of same field with 0-3)
	111	* bit 7 = ??? (some independent flag)
	112	*
	113	* 0x0a-0x0e: secondary measurement
	114	* 0x0a: measured quantity
	115	* 0 = none
	116	* 1 = dissipation factor
	117	* 2 = quality factor
	118	* 3 = parallel AC resistance / ESR
	119	* 4 = phase angle
	120	* 0x0b-0x0e: like primary measurement
	121	*
	122	* 0x0f: footer1 (0x0d) ?
	123	* 0x10: footer2 (0x0a) ?
	124	*/
	125
	126	static const double frequencies[] = {
	127	SR_HZ(0), SR_HZ(100), SR_HZ(120),
	128	SR_KHZ(1), SR_KHZ(10), SR_KHZ(100),
	129	};
	130
	131	static const size_t freq_code_map[] = {
	132	1, 2, 3, 4, 5, 0,
	133	};
	134
	135	static uint64_t get_frequency(size_t code)
	136	{
	137	uint64_t freq;
	138
	139	if (code >= ARRAY_SIZE(freq_code_map)) {
	140	sr_err("Unknown output frequency code %zu.", code);
	141	return frequencies[0];
	142	}
	143
	144	code = freq_code_map[code];
	145	freq = frequencies[code];
	146
	147	return freq;
	148	}
	149
	150	enum { MODEL_NONE, MODEL_PAR, MODEL_SER, MODEL_AUTO, };
	151
	152	static const char *const circuit_models[] = {
	153	"NONE", "PARALLEL", "SERIES", "AUTO",
	154	};
	155
	156	static const char *get_equiv_model(size_t code)
	157	{
	158	if (code >= ARRAY_SIZE(circuit_models)) {
	159	sr_err("Unknown equivalent circuit model code %zu.", code);
	160	return "NONE";
	161	}
	162
	163	return circuit_models[code];
	164	}
	165
	166	static const uint8_t pkt_to_buf(const uint8_t pkt, int is_secondary)
	167	{
	168	return is_secondary ? pkt + 10 : pkt + 5;
	169	}
	170
	171	static int parse_mq(const uint8_t *pkt, int is_secondary, int is_parallel)
	172	{
	173	const uint8_t *buf;
	174
	175	buf = pkt_to_buf(pkt, is_secondary);
	176
	177	switch (is_secondary << 8 \| buf[0]) {
	178	case 0x001:
	179	return is_parallel ?
	180	SR_MQ_PARALLEL_INDUCTANCE : SR_MQ_SERIES_INDUCTANCE;
	181	case 0x002:
	182	return is_parallel ?
	183	SR_MQ_PARALLEL_CAPACITANCE : SR_MQ_SERIES_CAPACITANCE;
	184	case 0x003:
	185	case 0x103:
	186	return is_parallel ?
	187	SR_MQ_PARALLEL_RESISTANCE : SR_MQ_SERIES_RESISTANCE;
	188	case 0x004:
	189	return SR_MQ_RESISTANCE;
	190	case 0x100:
	191	return SR_MQ_DIFFERENCE;
	192	case 0x101:
	193	return SR_MQ_DISSIPATION_FACTOR;
	194	case 0x102:
	195	return SR_MQ_QUALITY_FACTOR;
	196	case 0x104:
	197	return SR_MQ_PHASE_ANGLE;
	198	}
	199
	200	sr_err("Unknown quantity 0x%03x.", is_secondary << 8 \| buf[0]);
	201
	202	return 0;
	203	}
	204
	205	static float parse_value(const uint8_t buf, int digits)
	206	{
	207	static const int exponents[] = {0, -1, -2, -3, -4, -5, -6, -7};
	208
	209	int exponent;
	210	int16_t val;
	211	float fval;
	212
	213	exponent = exponents[buf[3] & 7];
	214	*digits = -exponent;
	215	val = (buf[1] << 8) \| buf[2];
	216	fval = (float)val;
	217	fval *= powf(10, exponent);
	218
	219	return fval;
	220	}
	221
	222	static void parse_measurement(const uint8_t pkt, float floatval,
	223	struct sr_datafeed_analog *analog, int is_secondary)
	224	{
	225	static const struct {
	226	int unit;
	227	int exponent;
	228	} units[] = {
	229	{ SR_UNIT_UNITLESS, 0 }, /* no unit */
	230	{ SR_UNIT_OHM, 0 }, /* Ohm */
	231	{ SR_UNIT_OHM, 3 }, /* kOhm */
	232	{ SR_UNIT_OHM, 6 }, /* MOhm */
	233	{ -1, 0 }, /* ??? */
	234	{ SR_UNIT_HENRY, -6 }, /* uH */
	235	{ SR_UNIT_HENRY, -3 }, /* mH */
	236	{ SR_UNIT_HENRY, 0 }, /* H */
	237	{ SR_UNIT_HENRY, 3 }, /* kH */
	238	{ SR_UNIT_FARAD, -12 }, /* pF */
	239	{ SR_UNIT_FARAD, -9 }, /* nF */
	240	{ SR_UNIT_FARAD, -6 }, /* uF */
	241	{ SR_UNIT_FARAD, -3 }, /* mF */
	242	{ SR_UNIT_PERCENTAGE, 0 }, /* % */
	243	{ SR_UNIT_DEGREE, 0 }, /* degree */
	244	};
	245
	246	const uint8_t *buf;
	247	int digits, exponent;
	248	int state;
	249
	250	buf = pkt_to_buf(pkt, is_secondary);
	251
	252	analog->meaning->mq = 0;
	253	analog->meaning->mqflags = 0;
	254
	255	state = buf[4] & 0xf;
	256
	257	if (state != 0 && state != 3)
	258	return;
	259
	260	if (pkt[2] & 0x18) {
	261	/* Calibration and Sorting modes not supported. */
	262	return;
	263	}
	264
	265	if (!is_secondary) {
	266	if (pkt[2] & 0x01)
	267	analog->meaning->mqflags \|= SR_MQFLAG_HOLD;
	268	if (pkt[2] & 0x02)
	269	analog->meaning->mqflags \|= SR_MQFLAG_REFERENCE;
	270	} else {
	271	if (pkt[2] & 0x04)
	272	analog->meaning->mqflags \|= SR_MQFLAG_RELATIVE;
	273	}
	274
	275	if ((analog->meaning->mq = parse_mq(pkt, is_secondary, pkt[2] & 0x80)) == 0)
	276	return;
	277
	278	if ((buf[3] >> 3) >= ARRAY_SIZE(units)) {
	279	sr_err("Unknown unit %u.", buf[3] >> 3);
	280	analog->meaning->mq = 0;
	281	return;
	282	}
	283
	284	analog->meaning->unit = units[buf[3] >> 3].unit;
	285
	286	exponent = units[buf[3] >> 3].exponent;
	287	*floatval = parse_value(buf, &digits);
	288	floatval = (state == 0) ? powf(10, exponent) : INFINITY;
	289	analog->encoding->digits = digits - exponent;
	290	analog->spec->spec_digits = digits - exponent;
	291	}
	292
	293	static uint64_t parse_freq(const uint8_t *pkt)
	294	{
	295	return get_frequency(pkt[3] >> 5);
	296	}
	297
	298	static const char parse_model(const uint8_t pkt)
	299	{
	300	size_t code;
	301
	302	if (pkt[2] & 0x40)
	303	code = MODEL_AUTO;
	304	else if (parse_mq(pkt, 0, 0) == SR_MQ_RESISTANCE)
	305	code = MODEL_NONE;
	306	else
	307	code = (pkt[2] & 0x80) ? MODEL_PAR : MODEL_SER;
	308
	309	return get_equiv_model(code);
	310	}
	311
	312	SR_PRIV gboolean es51919_packet_valid(const uint8_t *pkt)
	313	{
	314
	315	/* Check for fixed 0x00 0x0d prefix. */
	316	if (pkt[0] != 0x00 \|\| pkt[1] != 0x0d)
	317	return FALSE;
	318
	319	/* Check for fixed 0x0d 0x0a suffix. */
	320	if (pkt[15] != 0x0d \|\| pkt[16] != 0x0a)
	321	return FALSE;
	322
	323	/* Packet appears to be valid. */
	324	return TRUE;
	325	}
	326
	327	SR_PRIV int es51919_packet_parse(const uint8_t pkt, float val,
	328	struct sr_datafeed_analog analog, void info)
	329	{
	330	struct lcr_parse_info *parse_info;
	331
	332	parse_info = info;
	333	if (!parse_info->ch_idx) {
	334	parse_info->output_freq = parse_freq(pkt);
	335	parse_info->circuit_model = parse_model(pkt);
	336	}
	337	if (val && analog)
	338	parse_measurement(pkt, val, analog, parse_info->ch_idx == 1);
	339
	340	return SR_OK;
	341	}
	342
	343	/*
	344	* These are the get/set/list routines for the _chip_ specific parameters,
	345	* the _device_ driver resides in src/hardware/serial-lcr/ instead.
	346	*/
	347
	348	SR_PRIV int es51919_config_list(uint32_t key, GVariant **data,
	349	const struct sr_dev_inst sdi, const struct sr_channel_group cg)
	350	{
	351
	352	(void)sdi;
	353	(void)cg;
	354
	355	switch (key) {
	356	case SR_CONF_OUTPUT_FREQUENCY:
	357	*data = g_variant_new_fixed_array(G_VARIANT_TYPE_DOUBLE,
	358	ARRAY_AND_SIZE(frequencies), sizeof(frequencies[0]));
	359	return SR_OK;
	360	case SR_CONF_EQUIV_CIRCUIT_MODEL:
	361	*data = g_variant_new_strv(ARRAY_AND_SIZE(circuit_models));
	362	return SR_OK;
	363	default:
	364	return SR_ERR_NA;
	365	}
	366	/* UNREACH */
	367	}
	368
	369	#endif