[libsigrok.git] / hardware / common / dmm / fs9721.c

/*
 * This file is part of the libsigrok project.
 *
 * Copyright (C) 2012 Uwe Hermann <uwe@hermann-uwe.de>
 * Copyright (C) 2012 Alexandru Gagniuc <mr.nuke.me@gmail.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 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
 */

/*
 * Fortune Semiconductor FS9721_LP3/FS9721B protocol parser.
 *
 * FS9721_LP3: 4000 counts (3 3/4 digits)
 * FS9721B/Q100: 2400 counts (3 2/3 digits)
 *
 * Same for both chips:
 *  - Packages: Bare die (78 pins) or QFP-100
 *  - Communication parameters: Unidirectional, 2400/8n1
 *  - The protocol seems to be exactly the same.
 */

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

/* Message logging helpers with driver-specific prefix string. */
#define DRIVER_LOG_DOMAIN "fs9721: "
#define sr_log(l, s, args...) sr_log(l, DRIVER_LOG_DOMAIN s, ## args)
#define sr_spew(s, args...) sr_spew(DRIVER_LOG_DOMAIN s, ## args)
#define sr_dbg(s, args...) sr_dbg(DRIVER_LOG_DOMAIN s, ## args)
#define sr_info(s, args...) sr_info(DRIVER_LOG_DOMAIN s, ## args)
#define sr_warn(s, args...) sr_warn(DRIVER_LOG_DOMAIN s, ## args)
#define sr_err(s, args...) sr_err(DRIVER_LOG_DOMAIN s, ## args)

static int parse_digit(uint8_t b)
{
	switch (b) {
	case 0x7d:
		return 0;
	case 0x05:
		return 1;
	case 0x5b:
		return 2;
	case 0x1f:
		return 3;
	case 0x27:
		return 4;
	case 0x3e:
		return 5;
	case 0x7e:
		return 6;
	case 0x15:
		return 7;
	case 0x7f:
		return 8;
	case 0x3f:
		return 9;
	default:
		sr_err("Invalid digit byte: 0x%02x.", b);
		return -1;
	}
}

static gboolean sync_nibbles_valid(const uint8_t *buf)
{
	int i;

	/* Check the synchronization nibbles, and make sure they all match. */
	for (i = 0; i < FS9721_PACKET_SIZE; i++) {
		if (((buf[i] >> 4) & 0x0f) != (i + 1)) {
			sr_err("Sync nibble in byte %d (0x%02x) is invalid.",
			       i, buf[i]);
			return FALSE;
		}
	}

	return TRUE;
}

static gboolean flags_valid(const struct fs9721_info *info)
{
	int count;

	/* Does the packet have more than one multiplier? */
	count = 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_hz) ? 1 : 0;
	count += (info->is_ohm) ? 1 : 0;
	count += (info->is_farad) ? 1 : 0;
	count += (info->is_ampere) ? 1 : 0;
	count += (info->is_volt) ? 1 : 0;
	count += (info->is_percent) ? 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;
	}

	/* RS232 flag not set? */
	if (!info->is_rs232) {
		sr_err("No RS232 flag detected in packet.");
		return FALSE;
	}

	return TRUE;
}

static int parse_value(const uint8_t *buf, float *result)
{
	int i, sign, intval = 0, digits[4];
	uint8_t digit_bytes[4];
	float floatval;

	/* Byte 1: LCD SEG2 */
	sign = ((buf[1] & (1 << 3)) != 0) ? -1 : 1;

	/*
	 * Bytes 1-8: Value (4 decimal digits, sign, decimal point)
	 *
	 * Over limit: "0L" (LCD), 0x00 0x7d 0x68 0x00 (digit bytes).
	 */

	/* Merge the two nibbles for a digit into one byte. */
	for (i = 0; i < 4; i++) {
		digit_bytes[i] = ((buf[1 + (i * 2)] & 0x0f) << 4);
		digit_bytes[i] |= (buf[1 + (i * 2) + 1] & 0x0f);

		/* Bit 7 in the byte is not part of the digit. */
		digit_bytes[i] &= ~(1 << 7);
	}

	/* Check for "OL". */
	if (digit_bytes[0] == 0x00 && digit_bytes[1] == 0x7d &&
	    digit_bytes[2] == 0x68 && digit_bytes[3] == 0x00) {
		sr_spew("Over limit.");
		*result = INFINITY;
		return SR_OK;
	}

	/* Parse the digits. */
	for (i = 0; i < 4; i++)
		digits[i] = parse_digit(digit_bytes[i]);
	sr_spew("Digits: %02x %02x %02x %02x (%d%d%d%d).",
		digit_bytes[0], digit_bytes[1], digit_bytes[2], digit_bytes[3],
		digits[0], digits[1], digits[2], digits[3]);

	/* Merge all digits into an integer value. */
	for (i = 0; i < 4; i++) {
		intval *= 10;
		intval += digits[i];
	}

	floatval = (float)intval;

	/* Decimal point position. */
	if ((buf[3] & (1 << 3)) != 0) {
		floatval /= 1000;
		sr_spew("Decimal point after first digit.");
	} else if ((buf[5] & (1 << 3)) != 0) {
		floatval /= 100;
		sr_spew("Decimal point after second digit.");
	} else if ((buf[7] & (1 << 3)) != 0) {
		floatval /= 10;
		sr_spew("Decimal point after third digit.");
	} else {
		sr_spew("No decimal point in the number.");
	}

	/* Apply sign. */
	floatval *= sign;

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

	*result = floatval;

	return SR_OK;
}

static void parse_flags(const uint8_t *buf, struct fs9721_info *info)
{
	/* Byte 0: LCD SEG1 */
	info->is_ac         = (buf[0] & (1 << 3)) != 0;
	info->is_dc         = (buf[0] & (1 << 2)) != 0;
	info->is_auto       = (buf[0] & (1 << 1)) != 0;
	info->is_rs232      = (buf[0] & (1 << 0)) != 0;

	/* Byte 1: LCD SEG2 */
	info->is_sign       = (buf[1] & (1 << 3)) != 0;

	/* Byte 9: LCD SEG10 */
	info->is_micro      = (buf[9] & (1 << 3)) != 0;
	info->is_nano       = (buf[9] & (1 << 2)) != 0;
	info->is_kilo       = (buf[9] & (1 << 1)) != 0;
	info->is_diode      = (buf[9] & (1 << 0)) != 0;

	/* Byte 10: LCD SEG11 */
	info->is_milli      = (buf[10] & (1 << 3)) != 0;
	info->is_percent    = (buf[10] & (1 << 2)) != 0;
	info->is_mega       = (buf[10] & (1 << 1)) != 0;
	info->is_beep       = (buf[10] & (1 << 0)) != 0;

	/* Byte 11: LCD SEG12 */
	info->is_farad      = (buf[11] & (1 << 3)) != 0;
	info->is_ohm        = (buf[11] & (1 << 2)) != 0;
	info->is_rel        = (buf[11] & (1 << 1)) != 0;
	info->is_hold       = (buf[11] & (1 << 0)) != 0;

	/* Byte 12: LCD SEG13 */
	info->is_ampere     = (buf[12] & (1 << 3)) != 0;
	info->is_volt       = (buf[12] & (1 << 2)) != 0;
	info->is_hz         = (buf[12] & (1 << 1)) != 0;
	info->is_bat        = (buf[12] & (1 << 0)) != 0;

	/* Byte 13: LCD SEG14 */
	info->is_c2c1_11    = (buf[13] & (1 << 3)) != 0;
	info->is_c2c1_10    = (buf[13] & (1 << 2)) != 0;
	info->is_c2c1_01    = (buf[13] & (1 << 1)) != 0;
	info->is_c2c1_00    = (buf[13] & (1 << 0)) != 0;
}

static void handle_flags(struct sr_datafeed_analog *analog, float *floatval,
			 const struct fs9721_info *info)
{
	/* Factors */
	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_hz) {
		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_beep) {
		analog->mq = SR_MQ_CONTINUITY;
		analog->unit = SR_UNIT_BOOLEAN;
		*floatval = (*floatval == INFINITY) ? 0.0 : 1.0;
	}
	if (info->is_diode) {
		analog->mq = SR_MQ_VOLTAGE;
		analog->unit = SR_UNIT_VOLT;
	}
	if (info->is_percent) {
		analog->mq = SR_MQ_DUTY_CYCLE;
		analog->unit = SR_UNIT_PERCENTAGE;
	}

	/* Measurement related flags */
	if (info->is_ac)
		analog->mqflags |= SR_MQFLAG_AC;
	if (info->is_dc)
		analog->mqflags |= SR_MQFLAG_DC;
	if (info->is_auto)
		analog->mqflags |= SR_MQFLAG_AUTORANGE;
	if (info->is_hold)
		analog->mqflags |= SR_MQFLAG_HOLD;
	if (info->is_rel)
		analog->mqflags |= SR_MQFLAG_RELATIVE;

	/* Other flags */
	if (info->is_rs232)
		sr_spew("RS232 enabled.");
	if (info->is_bat)
		sr_spew("Battery is low.");
	if (info->is_c2c1_00)
		sr_spew("User-defined LCD symbol 0 is active.");
	if (info->is_c2c1_01)
		sr_spew("User-defined LCD symbol 1 is active.");
	if (info->is_c2c1_10)
		sr_spew("User-defined LCD symbol 2 is active.");
	if (info->is_c2c1_11)
		sr_spew("User-defined LCD symbol 3 is active.");
}

SR_PRIV gboolean sr_fs9721_packet_valid(const uint8_t *buf)
{
	struct fs9721_info info;

	parse_flags(buf, &info);

	return (sync_nibbles_valid(buf) && flags_valid(&info));
}

/**
 * Parse a protocol packet.
 *
 * @param buf Buffer containing the 14-byte protocol packet. Must not be NULL.
 * @param floatval Pointer to a float variable. That variable will contain the
 *                 result value upon parsing success. Mut 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 fs9721_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_fs9721_parse(const uint8_t *buf, float *floatval,
			    struct sr_datafeed_analog *analog, void *info)
{
	int ret;
	struct fs9721_info *info_local;

	info_local = (struct fs9721_info *)info;

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

	parse_flags(buf, info_local);
	handle_flags(analog, floatval, info_local);

	return SR_OK;
}
Commit	Line	Data
6c701476	1	/*
50985c20	2	* This file is part of the libsigrok project.
6c701476 UH	3	*
6c701476 UH	4	* Copyright (C) 2012 Uwe Hermann <uwe@hermann-uwe.de>
8c1adf37	5	* Copyright (C) 2012 Alexandru Gagniuc <mr.nuke.me@gmail.com>
6c701476 UH	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 2 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, write to the Free Software
	19	* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
	20	*/
	21
	22	/*
	23	* Fortune Semiconductor FS9721_LP3/FS9721B protocol parser.
	24	*
	25	* FS9721_LP3: 4000 counts (3 3/4 digits)
	26	* FS9721B/Q100: 2400 counts (3 2/3 digits)
	27	*
	28	* Same for both chips:
	29	* - Packages: Bare die (78 pins) or QFP-100
	30	* - Communication parameters: Unidirectional, 2400/8n1
	31	* - The protocol seems to be exactly the same.
	32	*/
	33
	34	#include <string.h>
	35	#include <ctype.h>
	36	#include <math.h>
	37	#include <glib.h>
	38	#include "libsigrok.h"
	39	#include "libsigrok-internal.h"
	40
	41	/* Message logging helpers with driver-specific prefix string. */
	42	#define DRIVER_LOG_DOMAIN "fs9721: "
	43	#define sr_log(l, s, args...) sr_log(l, DRIVER_LOG_DOMAIN s, ## args)
	44	#define sr_spew(s, args...) sr_spew(DRIVER_LOG_DOMAIN s, ## args)
	45	#define sr_dbg(s, args...) sr_dbg(DRIVER_LOG_DOMAIN s, ## args)
	46	#define sr_info(s, args...) sr_info(DRIVER_LOG_DOMAIN s, ## args)
	47	#define sr_warn(s, args...) sr_warn(DRIVER_LOG_DOMAIN s, ## args)
	48	#define sr_err(s, args...) sr_err(DRIVER_LOG_DOMAIN s, ## args)
	49
	50	static int parse_digit(uint8_t b)
	51	{
	52	switch (b) {
	53	case 0x7d:
	54	return 0;
	55	case 0x05:
	56	return 1;
	57	case 0x5b:
	58	return 2;
	59	case 0x1f:
	60	return 3;
	61	case 0x27:
	62	return 4;
	63	case 0x3e:
	64	return 5;
	65	case 0x7e:
	66	return 6;
	67	case 0x15:
	68	return 7;
	69	case 0x7f:
70	return 8;
71	case 0x3f:
72	return 9;
73	default:
74	sr_err("Invalid digit byte: 0x%02x.", b);
75	return -1;
76	}
77	}
78
8c1adf37 UH	79	static gboolean sync_nibbles_valid(const uint8_t *buf)
	80	{
	81	int i;
	82
	83	/* Check the synchronization nibbles, and make sure they all match. */
	84	for (i = 0; i < FS9721_PACKET_SIZE; i++) {
	85	if (((buf[i] >> 4) & 0x0f) != (i + 1)) {
	86	sr_err("Sync nibble in byte %d (0x%02x) is invalid.",
	87	i, buf[i]);
	88	return FALSE;
	89	}
	90	}
	91
	92	return TRUE;
	93	}
	94
	95	static gboolean flags_valid(const struct fs9721_info *info)
	96	{
	97	int count;
	98
	99	/* Does the packet have more than one multiplier? */
	100	count = 0;
	101	count += (info->is_nano) ? 1 : 0;
	102	count += (info->is_micro) ? 1 : 0;
	103	count += (info->is_milli) ? 1 : 0;
	104	count += (info->is_kilo) ? 1 : 0;
	105	count += (info->is_mega) ? 1 : 0;
	106	if (count > 1) {
	107	sr_err("More than one multiplier detected in packet.");
	108	return FALSE;
	109	}
	110
	111	/* Does the packet "measure" more than one type of value? */
	112	count = 0;
	113	count += (info->is_hz) ? 1 : 0;
	114	count += (info->is_ohm) ? 1 : 0;
	115	count += (info->is_farad) ? 1 : 0;
	116	count += (info->is_ampere) ? 1 : 0;
	117	count += (info->is_volt) ? 1 : 0;
	118	count += (info->is_percent) ? 1 : 0;
	119	if (count > 1) {
	120	sr_err("More than one measurement type detected in packet.");
	121	return FALSE;
	122	}
	123
	124	/* Both AC and DC set? */
	125	if (info->is_ac && info->is_dc) {
	126	sr_err("Both AC and DC flags detected in packet.");
	127	return FALSE;
	128	}
	129
	130	/* RS232 flag not set? */
	131	if (!info->is_rs232) {
	132	sr_err("No RS232 flag detected in packet.");
	133	return FALSE;
	134	}
	135
	136	return TRUE;
	137	}
	138
6c701476 UH	139	static int parse_value(const uint8_t buf, float result)
	140	{
	141	int i, sign, intval = 0, digits[4];
	142	uint8_t digit_bytes[4];
	143	float floatval;
	144
	145	/* Byte 1: LCD SEG2 */
	146	sign = ((buf[1] & (1 << 3)) != 0) ? -1 : 1;
	147
	148	/*
	149	* Bytes 1-8: Value (4 decimal digits, sign, decimal point)
	150	*
	151	* Over limit: "0L" (LCD), 0x00 0x7d 0x68 0x00 (digit bytes).
	152	*/
	153
	154	/* Merge the two nibbles for a digit into one byte. */
	155	for (i = 0; i < 4; i++) {
	156	digit_bytes[i] = ((buf[1 + (i * 2)] & 0x0f) << 4);
	157	digit_bytes[i] \|= (buf[1 + (i * 2) + 1] & 0x0f);
	158
	159	/* Bit 7 in the byte is not part of the digit. */
	160	digit_bytes[i] &= ~(1 << 7);
	161	}
	162
	163	/* Check for "OL". */
	164	if (digit_bytes[0] == 0x00 && digit_bytes[1] == 0x7d &&
	165	digit_bytes[2] == 0x68 && digit_bytes[3] == 0x00) {
	166	sr_spew("Over limit.");
	167	*result = INFINITY;
	168	return SR_OK;
	169	}
	170
	171	/* Parse the digits. */
	172	for (i = 0; i < 4; i++)
	173	digits[i] = parse_digit(digit_bytes[i]);
	174	sr_spew("Digits: %02x %02x %02x %02x (%d%d%d%d).",
	175	digit_bytes[0], digit_bytes[1], digit_bytes[2], digit_bytes[3],
	176	digits[0], digits[1], digits[2], digits[3]);
	177
	178	/* Merge all digits into an integer value. */
	179	for (i = 0; i < 4; i++) {
	180	intval *= 10;
	181	intval += digits[i];
	182	}
	183
6c701476 UH	184	floatval = (float)intval;
	185
	186	/* Decimal point position. */
	187	if ((buf[3] & (1 << 3)) != 0) {
	188	floatval /= 1000;
	189	sr_spew("Decimal point after first digit.");
	190	} else if ((buf[5] & (1 << 3)) != 0) {
	191	floatval /= 100;
	192	sr_spew("Decimal point after second digit.");
	193	} else if ((buf[7] & (1 << 3)) != 0) {
	194	floatval /= 10;
	195	sr_spew("Decimal point after third digit.");
	196	} else {
	197	sr_spew("No decimal point in the number.");
	198	}
	199
	200	/* Apply sign. */
	201	floatval *= sign;
	202
	203	sr_spew("The display value is %f.", floatval);
	204
	205	*result = floatval;
	206
	207	return SR_OK;
	208	}
	209
8c1adf37	210	static void parse_flags(const uint8_t buf, struct fs9721_info info)
6c701476	211	{
6c701476	212	/* Byte 0: LCD SEG1 */
8c1adf37 UH	213	info->is_ac = (buf[0] & (1 << 3)) != 0;
	214	info->is_dc = (buf[0] & (1 << 2)) != 0;
	215	info->is_auto = (buf[0] & (1 << 1)) != 0;
	216	info->is_rs232 = (buf[0] & (1 << 0)) != 0;
	217
	218	/* Byte 1: LCD SEG2 */
	219	info->is_sign = (buf[1] & (1 << 3)) != 0;
6c701476 UH	220
6c701476 UH	221	/* Byte 9: LCD SEG10 */
8c1adf37 UH	222	info->is_micro = (buf[9] & (1 << 3)) != 0;
	223	info->is_nano = (buf[9] & (1 << 2)) != 0;
	224	info->is_kilo = (buf[9] & (1 << 1)) != 0;
	225	info->is_diode = (buf[9] & (1 << 0)) != 0;
6c701476 UH	226
6c701476 UH	227	/* Byte 10: LCD SEG11 */
8c1adf37 UH	228	info->is_milli = (buf[10] & (1 << 3)) != 0;
	229	info->is_percent = (buf[10] & (1 << 2)) != 0;
	230	info->is_mega = (buf[10] & (1 << 1)) != 0;
	231	info->is_beep = (buf[10] & (1 << 0)) != 0;
6c701476 UH	232
6c701476 UH	233	/* Byte 11: LCD SEG12 */
8c1adf37 UH	234	info->is_farad = (buf[11] & (1 << 3)) != 0;
	235	info->is_ohm = (buf[11] & (1 << 2)) != 0;
	236	info->is_rel = (buf[11] & (1 << 1)) != 0;
	237	info->is_hold = (buf[11] & (1 << 0)) != 0;
6c701476 UH	238
6c701476 UH	239	/* Byte 12: LCD SEG13 */
8c1adf37 UH	240	info->is_ampere = (buf[12] & (1 << 3)) != 0;
	241	info->is_volt = (buf[12] & (1 << 2)) != 0;
	242	info->is_hz = (buf[12] & (1 << 1)) != 0;
	243	info->is_bat = (buf[12] & (1 << 0)) != 0;
6c701476 UH	244
6c701476 UH	245	/* Byte 13: LCD SEG14 */
8c1adf37 UH	246	info->is_c2c1_11 = (buf[13] & (1 << 3)) != 0;
	247	info->is_c2c1_10 = (buf[13] & (1 << 2)) != 0;
	248	info->is_c2c1_01 = (buf[13] & (1 << 1)) != 0;
	249	info->is_c2c1_00 = (buf[13] & (1 << 0)) != 0;
	250	}
6c701476	251
8c1adf37 UH	252	static void handle_flags(struct sr_datafeed_analog analog, float floatval,
	253	const struct fs9721_info *info)
	254	{
6c701476	255	/* Factors */
8c1adf37	256	if (info->is_nano)
6c701476	257	*floatval /= 1000000000;
8c1adf37	258	if (info->is_micro)
6c701476	259	*floatval /= 1000000;
8c1adf37	260	if (info->is_milli)
6c701476	261	*floatval /= 1000;
8c1adf37	262	if (info->is_kilo)
6c701476	263	floatval = 1000;
8c1adf37	264	if (info->is_mega)
6c701476 UH	265	floatval = 1000000;
	266
	267	/* Measurement modes */
8c1adf37	268	if (info->is_volt) {
6c701476 UH	269	analog->mq = SR_MQ_VOLTAGE;
	270	analog->unit = SR_UNIT_VOLT;
	271	}
8c1adf37	272	if (info->is_ampere) {
6c701476 UH	273	analog->mq = SR_MQ_CURRENT;
	274	analog->unit = SR_UNIT_AMPERE;
	275	}
8c1adf37	276	if (info->is_ohm) {
6c701476 UH	277	analog->mq = SR_MQ_RESISTANCE;
	278	analog->unit = SR_UNIT_OHM;
	279	}
8c1adf37	280	if (info->is_hz) {
6c701476 UH	281	analog->mq = SR_MQ_FREQUENCY;
	282	analog->unit = SR_UNIT_HERTZ;
	283	}
8c1adf37	284	if (info->is_farad) {
6c701476 UH	285	analog->mq = SR_MQ_CAPACITANCE;
	286	analog->unit = SR_UNIT_FARAD;
	287	}
8c1adf37	288	if (info->is_beep) {
6c701476 UH	289	analog->mq = SR_MQ_CONTINUITY;
6c701476 UH	290	analog->unit = SR_UNIT_BOOLEAN;
8c1adf37	291	floatval = (floatval == INFINITY) ? 0.0 : 1.0;
6c701476	292	}
8c1adf37	293	if (info->is_diode) {
6c701476 UH	294	analog->mq = SR_MQ_VOLTAGE;
	295	analog->unit = SR_UNIT_VOLT;
	296	}
8c1adf37	297	if (info->is_percent) {
6c701476 UH	298	analog->mq = SR_MQ_DUTY_CYCLE;
	299	analog->unit = SR_UNIT_PERCENTAGE;
	300	}
	301
	302	/* Measurement related flags */
8c1adf37	303	if (info->is_ac)
6c701476	304	analog->mqflags \|= SR_MQFLAG_AC;
8c1adf37	305	if (info->is_dc)
6c701476	306	analog->mqflags \|= SR_MQFLAG_DC;
8c1adf37	307	if (info->is_auto)
6c701476	308	analog->mqflags \|= SR_MQFLAG_AUTORANGE;
8c1adf37	309	if (info->is_hold)
6c701476	310	analog->mqflags \|= SR_MQFLAG_HOLD;
8c1adf37	311	if (info->is_rel)
6c701476 UH	312	analog->mqflags \|= SR_MQFLAG_RELATIVE;
	313
	314	/* Other flags */
8c1adf37	315	if (info->is_rs232)
6c701476	316	sr_spew("RS232 enabled.");
8c1adf37	317	if (info->is_bat)
6c701476	318	sr_spew("Battery is low.");
8c1adf37	319	if (info->is_c2c1_00)
6c701476	320	sr_spew("User-defined LCD symbol 0 is active.");
8c1adf37	321	if (info->is_c2c1_01)
6c701476	322	sr_spew("User-defined LCD symbol 1 is active.");
8c1adf37	323	if (info->is_c2c1_10)
6c701476	324	sr_spew("User-defined LCD symbol 2 is active.");
8c1adf37	325	if (info->is_c2c1_11)
6c701476	326	sr_spew("User-defined LCD symbol 3 is active.");
8c1adf37	327	}
6c701476	328
8c1adf37 UH	329	SR_PRIV gboolean sr_fs9721_packet_valid(const uint8_t *buf)
	330	{
	331	struct fs9721_info info;
	332
	333	parse_flags(buf, &info);
	334
	335	return (sync_nibbles_valid(buf) && flags_valid(&info));
6c701476 UH	336	}
	337
	338	/**
	339	* Parse a protocol packet.
	340	*
93357bc3	341	* @param buf Buffer containing the 14-byte protocol packet. Must not be NULL.
8c1adf37	342	* @param floatval Pointer to a float variable. That variable will contain the
93357bc3	343	* result value upon parsing success. Mut not be NULL.
6c701476 UH	344	* @param analog Pointer to a struct sr_datafeed_analog. The struct will be
6c701476 UH	345	* filled with data according to the protocol packet.
93357bc3	346	* Must not be NULL.
8c1adf37	347	* @param info Pointer to a struct fs9721_info. The struct will be filled
93357bc3	348	* with data according to the protocol packet. Must not be NULL.
6c701476 UH	349	*
	350	* @return SR_OK upon success, SR_ERR upon failure. Upon errors, the
	351	* 'analog' variable contents are undefined and should not be used.
	352	*/
8c1adf37	353	SR_PRIV int sr_fs9721_parse(const uint8_t buf, float floatval,
93357bc3	354	struct sr_datafeed_analog analog, void info)
6c701476 UH	355	{
6c701476 UH	356	int ret;
93357bc3 UH	357	struct fs9721_info *info_local;
	358
	359	info_local = (struct fs9721_info *)info;
6c701476 UH	360
	361	if ((ret = parse_value(buf, floatval)) != SR_OK) {
	362	sr_err("Error parsing value: %d.", ret);
	363	return ret;
	364	}
	365
93357bc3 UH	366	parse_flags(buf, info_local);
93357bc3 UH	367	handle_flags(analog, floatval, info_local);
6c701476 UH	368
	369	return SR_OK;
	370	}