[libsigrok.git] / src / 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 <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 "fs9721"

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_dbg("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_dbg("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_dbg("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_dbg("More than one measurement type detected in packet.");
		return FALSE;
	}

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

	/* RS232 flag not set? */
	if (!info->is_rs232) {
		sr_dbg("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->meaning->mq = SR_MQ_VOLTAGE;
		analog->meaning->unit = SR_UNIT_VOLT;
	}
	if (info->is_ampere) {
		analog->meaning->mq = SR_MQ_CURRENT;
		analog->meaning->unit = SR_UNIT_AMPERE;
	}
	if (info->is_ohm) {
		analog->meaning->mq = SR_MQ_RESISTANCE;
		analog->meaning->unit = SR_UNIT_OHM;
	}
	if (info->is_hz) {
		analog->meaning->mq = SR_MQ_FREQUENCY;
		analog->meaning->unit = SR_UNIT_HERTZ;
	}
	if (info->is_farad) {
		analog->meaning->mq = SR_MQ_CAPACITANCE;
		analog->meaning->unit = SR_UNIT_FARAD;
	}
	if (info->is_beep) {
		analog->meaning->mq = SR_MQ_CONTINUITY;
		analog->meaning->unit = SR_UNIT_BOOLEAN;
		*floatval = (*floatval == INFINITY) ? 0.0 : 1.0;
	}
	if (info->is_diode) {
		analog->meaning->mq = SR_MQ_VOLTAGE;
		analog->meaning->unit = SR_UNIT_VOLT;
	}
	if (info->is_percent) {
		analog->meaning->mq = SR_MQ_DUTY_CYCLE;
		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_auto)
		analog->meaning->mqflags |= SR_MQFLAG_AUTORANGE;
	if (info->is_diode)
		analog->meaning->mqflags |= SR_MQFLAG_DIODE;
	if (info->is_hold)
		analog->meaning->mqflags |= SR_MQFLAG_HOLD;
	if (info->is_rel)
		analog->meaning->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. 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 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_dbg("Error parsing value: %d.", ret);
		return ret;
	}

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

	return SR_OK;
}

SR_PRIV void sr_fs9721_00_temp_c(struct sr_datafeed_analog *analog, void *info)
{
	struct fs9721_info *info_local;

	info_local = (struct fs9721_info *)info;

	/* User-defined FS9721_LP3 flag 'c2c1_00' means temperature (C). */
	if (info_local->is_c2c1_00) {
		analog->meaning->mq = SR_MQ_TEMPERATURE;
		analog->meaning->unit = SR_UNIT_CELSIUS;
	}
}

SR_PRIV void sr_fs9721_01_temp_c(struct sr_datafeed_analog *analog, void *info)
{
	struct fs9721_info *info_local;

	info_local = (struct fs9721_info *)info;

	/* User-defined FS9721_LP3 flag 'c2c1_01' means temperature (C). */
	if (info_local->is_c2c1_01) {
		analog->meaning->mq = SR_MQ_TEMPERATURE;
		analog->meaning->unit = SR_UNIT_CELSIUS;
	}
}

SR_PRIV void sr_fs9721_10_temp_c(struct sr_datafeed_analog *analog, void *info)
{
	struct fs9721_info *info_local;

	info_local = (struct fs9721_info *)info;

	/* User-defined FS9721_LP3 flag 'c2c1_10' means temperature (C). */
	if (info_local->is_c2c1_10) {
		analog->meaning->mq = SR_MQ_TEMPERATURE;
		analog->meaning->unit = SR_UNIT_CELSIUS;
	}
}

SR_PRIV void sr_fs9721_01_10_temp_f_c(struct sr_datafeed_analog *analog, void *info)
{
	struct fs9721_info *info_local;

	info_local = (struct fs9721_info *)info;

	/* User-defined FS9721_LP3 flag 'c2c1_01' means temperature (F). */
	if (info_local->is_c2c1_01) {
		analog->meaning->mq = SR_MQ_TEMPERATURE;
		analog->meaning->unit = SR_UNIT_FAHRENHEIT;
	}

	/* User-defined FS9721_LP3 flag 'c2c1_10' means temperature (C). */
	if (info_local->is_c2c1_10) {
		analog->meaning->mq = SR_MQ_TEMPERATURE;
		analog->meaning->unit = SR_UNIT_CELSIUS;
	}
}

SR_PRIV void sr_fs9721_max_c_min(struct sr_datafeed_analog *analog, void *info)
{
	struct fs9721_info *info_local;

	info_local = (struct fs9721_info *)info;

	/* User-defined FS9721_LP3 flag 'c2c1_00' means MAX. */
	if (info_local->is_c2c1_00)
		analog->meaning->mqflags |= SR_MQFLAG_MAX;

	/* User-defined FS9721_LP3 flag 'c2c1_01' means temperature (C). */
	if (info_local->is_c2c1_01) {
		analog->meaning->mq = SR_MQ_TEMPERATURE;
		analog->meaning->unit = SR_UNIT_CELSIUS;
	}

	/* User-defined FS9721_LP3 flag 'c2c1_11' means MIN. */
	if (info_local->is_c2c1_11)
		analog->meaning->mqflags |= SR_MQFLAG_MIN;

}
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
6ec6c43b	34	#include <config.h>
6c701476 UH	35	#include <string.h>
	36	#include <ctype.h>
	37	#include <math.h>
	38	#include <glib.h>
c1aae900	39	#include <libsigrok/libsigrok.h>
6c701476 UH	40	#include "libsigrok-internal.h"
6c701476 UH	41
3544f848	42	#define LOG_PREFIX "fs9721"
6c701476 UH	43
	44	static int parse_digit(uint8_t b)
	45	{
	46	switch (b) {
	47	case 0x7d:
	48	return 0;
	49	case 0x05:
	50	return 1;
	51	case 0x5b:
	52	return 2;
	53	case 0x1f:
	54	return 3;
	55	case 0x27:
	56	return 4;
	57	case 0x3e:
	58	return 5;
	59	case 0x7e:
	60	return 6;
	61	case 0x15:
	62	return 7;
	63	case 0x7f:
	64	return 8;
	65	case 0x3f:
	66	return 9;
	67	default:
ec5186f9	68	sr_dbg("Invalid digit byte: 0x%02x.", b);
6c701476 UH	69	return -1;
	70	}
	71	}
	72
8c1adf37 UH	73	static gboolean sync_nibbles_valid(const uint8_t *buf)
	74	{
	75	int i;
	76
	77	/* Check the synchronization nibbles, and make sure they all match. */
	78	for (i = 0; i < FS9721_PACKET_SIZE; i++) {
	79	if (((buf[i] >> 4) & 0x0f) != (i + 1)) {
ec5186f9	80	sr_dbg("Sync nibble in byte %d (0x%02x) is invalid.",
8c1adf37 UH	81	i, buf[i]);
	82	return FALSE;
	83	}
	84	}
	85
	86	return TRUE;
	87	}
	88
	89	static gboolean flags_valid(const struct fs9721_info *info)
	90	{
	91	int count;
	92
	93	/* Does the packet have more than one multiplier? */
	94	count = 0;
	95	count += (info->is_nano) ? 1 : 0;
	96	count += (info->is_micro) ? 1 : 0;
	97	count += (info->is_milli) ? 1 : 0;
	98	count += (info->is_kilo) ? 1 : 0;
	99	count += (info->is_mega) ? 1 : 0;
	100	if (count > 1) {
ec5186f9	101	sr_dbg("More than one multiplier detected in packet.");
8c1adf37 UH	102	return FALSE;
	103	}
	104
	105	/* Does the packet "measure" more than one type of value? */
	106	count = 0;
	107	count += (info->is_hz) ? 1 : 0;
	108	count += (info->is_ohm) ? 1 : 0;
	109	count += (info->is_farad) ? 1 : 0;
	110	count += (info->is_ampere) ? 1 : 0;
	111	count += (info->is_volt) ? 1 : 0;
	112	count += (info->is_percent) ? 1 : 0;
	113	if (count > 1) {
ec5186f9	114	sr_dbg("More than one measurement type detected in packet.");
8c1adf37 UH	115	return FALSE;
	116	}
	117
	118	/* Both AC and DC set? */
	119	if (info->is_ac && info->is_dc) {
ec5186f9	120	sr_dbg("Both AC and DC flags detected in packet.");
8c1adf37 UH	121	return FALSE;
	122	}
	123
	124	/* RS232 flag not set? */
	125	if (!info->is_rs232) {
ec5186f9	126	sr_dbg("No RS232 flag detected in packet.");
8c1adf37 UH	127	return FALSE;
	128	}
	129
	130	return TRUE;
	131	}
	132
6c701476 UH	133	static int parse_value(const uint8_t buf, float result)
	134	{
	135	int i, sign, intval = 0, digits[4];
	136	uint8_t digit_bytes[4];
	137	float floatval;
	138
	139	/* Byte 1: LCD SEG2 */
	140	sign = ((buf[1] & (1 << 3)) != 0) ? -1 : 1;
	141
	142	/*
	143	* Bytes 1-8: Value (4 decimal digits, sign, decimal point)
	144	*
	145	* Over limit: "0L" (LCD), 0x00 0x7d 0x68 0x00 (digit bytes).
	146	*/
	147
	148	/* Merge the two nibbles for a digit into one byte. */
	149	for (i = 0; i < 4; i++) {
	150	digit_bytes[i] = ((buf[1 + (i * 2)] & 0x0f) << 4);
	151	digit_bytes[i] \|= (buf[1 + (i * 2) + 1] & 0x0f);
	152
	153	/* Bit 7 in the byte is not part of the digit. */
	154	digit_bytes[i] &= ~(1 << 7);
	155	}
	156
	157	/* Check for "OL". */
	158	if (digit_bytes[0] == 0x00 && digit_bytes[1] == 0x7d &&
	159	digit_bytes[2] == 0x68 && digit_bytes[3] == 0x00) {
	160	sr_spew("Over limit.");
	161	*result = INFINITY;
	162	return SR_OK;
	163	}
	164
	165	/* Parse the digits. */
	166	for (i = 0; i < 4; i++)
	167	digits[i] = parse_digit(digit_bytes[i]);
	168	sr_spew("Digits: %02x %02x %02x %02x (%d%d%d%d).",
	169	digit_bytes[0], digit_bytes[1], digit_bytes[2], digit_bytes[3],
	170	digits[0], digits[1], digits[2], digits[3]);
	171
	172	/* Merge all digits into an integer value. */
	173	for (i = 0; i < 4; i++) {
	174	intval *= 10;
	175	intval += digits[i];
	176	}
	177
6c701476 UH	178	floatval = (float)intval;
	179
	180	/* Decimal point position. */
	181	if ((buf[3] & (1 << 3)) != 0) {
	182	floatval /= 1000;
	183	sr_spew("Decimal point after first digit.");
	184	} else if ((buf[5] & (1 << 3)) != 0) {
	185	floatval /= 100;
	186	sr_spew("Decimal point after second digit.");
	187	} else if ((buf[7] & (1 << 3)) != 0) {
	188	floatval /= 10;
	189	sr_spew("Decimal point after third digit.");
	190	} else {
	191	sr_spew("No decimal point in the number.");
	192	}
	193
	194	/* Apply sign. */
	195	floatval *= sign;
	196
	197	sr_spew("The display value is %f.", floatval);
	198
	199	*result = floatval;
	200
	201	return SR_OK;
	202	}
	203
8c1adf37	204	static void parse_flags(const uint8_t buf, struct fs9721_info info)
6c701476	205	{
6c701476	206	/* Byte 0: LCD SEG1 */
8c1adf37 UH	207	info->is_ac = (buf[0] & (1 << 3)) != 0;
	208	info->is_dc = (buf[0] & (1 << 2)) != 0;
	209	info->is_auto = (buf[0] & (1 << 1)) != 0;
	210	info->is_rs232 = (buf[0] & (1 << 0)) != 0;
	211
	212	/* Byte 1: LCD SEG2 */
	213	info->is_sign = (buf[1] & (1 << 3)) != 0;
6c701476 UH	214
6c701476 UH	215	/* Byte 9: LCD SEG10 */
8c1adf37 UH	216	info->is_micro = (buf[9] & (1 << 3)) != 0;
	217	info->is_nano = (buf[9] & (1 << 2)) != 0;
	218	info->is_kilo = (buf[9] & (1 << 1)) != 0;
	219	info->is_diode = (buf[9] & (1 << 0)) != 0;
6c701476 UH	220
6c701476 UH	221	/* Byte 10: LCD SEG11 */
8c1adf37 UH	222	info->is_milli = (buf[10] & (1 << 3)) != 0;
	223	info->is_percent = (buf[10] & (1 << 2)) != 0;
	224	info->is_mega = (buf[10] & (1 << 1)) != 0;
	225	info->is_beep = (buf[10] & (1 << 0)) != 0;
6c701476 UH	226
6c701476 UH	227	/* Byte 11: LCD SEG12 */
8c1adf37 UH	228	info->is_farad = (buf[11] & (1 << 3)) != 0;
	229	info->is_ohm = (buf[11] & (1 << 2)) != 0;
	230	info->is_rel = (buf[11] & (1 << 1)) != 0;
	231	info->is_hold = (buf[11] & (1 << 0)) != 0;
6c701476 UH	232
6c701476 UH	233	/* Byte 12: LCD SEG13 */
8c1adf37 UH	234	info->is_ampere = (buf[12] & (1 << 3)) != 0;
	235	info->is_volt = (buf[12] & (1 << 2)) != 0;
	236	info->is_hz = (buf[12] & (1 << 1)) != 0;
	237	info->is_bat = (buf[12] & (1 << 0)) != 0;
6c701476 UH	238
6c701476 UH	239	/* Byte 13: LCD SEG14 */
8c1adf37 UH	240	info->is_c2c1_11 = (buf[13] & (1 << 3)) != 0;
	241	info->is_c2c1_10 = (buf[13] & (1 << 2)) != 0;
	242	info->is_c2c1_01 = (buf[13] & (1 << 1)) != 0;
	243	info->is_c2c1_00 = (buf[13] & (1 << 0)) != 0;
	244	}
6c701476	245
b02bb45f	246	static void handle_flags(struct sr_datafeed_analog analog, float floatval,
8c1adf37 UH	247	const struct fs9721_info *info)
8c1adf37 UH	248	{
6c701476	249	/* Factors */
8c1adf37	250	if (info->is_nano)
6c701476	251	*floatval /= 1000000000;
8c1adf37	252	if (info->is_micro)
6c701476	253	*floatval /= 1000000;
8c1adf37	254	if (info->is_milli)
6c701476	255	*floatval /= 1000;
8c1adf37	256	if (info->is_kilo)
6c701476	257	floatval = 1000;
8c1adf37	258	if (info->is_mega)
6c701476 UH	259	floatval = 1000000;
	260
	261	/* Measurement modes */
8c1adf37	262	if (info->is_volt) {
b02bb45f UH	263	analog->meaning->mq = SR_MQ_VOLTAGE;
b02bb45f UH	264	analog->meaning->unit = SR_UNIT_VOLT;
6c701476	265	}
8c1adf37	266	if (info->is_ampere) {
b02bb45f UH	267	analog->meaning->mq = SR_MQ_CURRENT;
b02bb45f UH	268	analog->meaning->unit = SR_UNIT_AMPERE;
6c701476	269	}
8c1adf37	270	if (info->is_ohm) {
b02bb45f UH	271	analog->meaning->mq = SR_MQ_RESISTANCE;
b02bb45f UH	272	analog->meaning->unit = SR_UNIT_OHM;
6c701476	273	}
8c1adf37	274	if (info->is_hz) {
b02bb45f UH	275	analog->meaning->mq = SR_MQ_FREQUENCY;
b02bb45f UH	276	analog->meaning->unit = SR_UNIT_HERTZ;
6c701476	277	}
8c1adf37	278	if (info->is_farad) {
b02bb45f UH	279	analog->meaning->mq = SR_MQ_CAPACITANCE;
b02bb45f UH	280	analog->meaning->unit = SR_UNIT_FARAD;
6c701476	281	}
8c1adf37	282	if (info->is_beep) {
b02bb45f UH	283	analog->meaning->mq = SR_MQ_CONTINUITY;
b02bb45f UH	284	analog->meaning->unit = SR_UNIT_BOOLEAN;
8c1adf37	285	floatval = (floatval == INFINITY) ? 0.0 : 1.0;
6c701476	286	}
8c1adf37	287	if (info->is_diode) {
b02bb45f UH	288	analog->meaning->mq = SR_MQ_VOLTAGE;
b02bb45f UH	289	analog->meaning->unit = SR_UNIT_VOLT;
6c701476	290	}
8c1adf37	291	if (info->is_percent) {
b02bb45f UH	292	analog->meaning->mq = SR_MQ_DUTY_CYCLE;
b02bb45f UH	293	analog->meaning->unit = SR_UNIT_PERCENTAGE;
6c701476 UH	294	}
	295
	296	/* Measurement related flags */
8c1adf37	297	if (info->is_ac)
b02bb45f	298	analog->meaning->mqflags \|= SR_MQFLAG_AC;
8c1adf37	299	if (info->is_dc)
b02bb45f	300	analog->meaning->mqflags \|= SR_MQFLAG_DC;
8c1adf37	301	if (info->is_auto)
b02bb45f	302	analog->meaning->mqflags \|= SR_MQFLAG_AUTORANGE;
a6ed50f4	303	if (info->is_diode)
b02bb45f	304	analog->meaning->mqflags \|= SR_MQFLAG_DIODE;
8c1adf37	305	if (info->is_hold)
b02bb45f	306	analog->meaning->mqflags \|= SR_MQFLAG_HOLD;
8c1adf37	307	if (info->is_rel)
b02bb45f	308	analog->meaning->mqflags \|= SR_MQFLAG_RELATIVE;
6c701476 UH	309
6c701476 UH	310	/* Other flags */
8c1adf37	311	if (info->is_rs232)
6c701476	312	sr_spew("RS232 enabled.");
8c1adf37	313	if (info->is_bat)
6c701476	314	sr_spew("Battery is low.");
8c1adf37	315	if (info->is_c2c1_00)
6c701476	316	sr_spew("User-defined LCD symbol 0 is active.");
8c1adf37	317	if (info->is_c2c1_01)
6c701476	318	sr_spew("User-defined LCD symbol 1 is active.");
8c1adf37	319	if (info->is_c2c1_10)
6c701476	320	sr_spew("User-defined LCD symbol 2 is active.");
8c1adf37	321	if (info->is_c2c1_11)
6c701476	322	sr_spew("User-defined LCD symbol 3 is active.");
8c1adf37	323	}
6c701476	324
8c1adf37 UH	325	SR_PRIV gboolean sr_fs9721_packet_valid(const uint8_t *buf)
	326	{
	327	struct fs9721_info info;
	328
	329	parse_flags(buf, &info);
	330
	331	return (sync_nibbles_valid(buf) && flags_valid(&info));
6c701476 UH	332	}
	333
	334	/**
	335	* Parse a protocol packet.
	336	*
93357bc3	337	* @param buf Buffer containing the 14-byte protocol packet. Must not be NULL.
8c1adf37	338	* @param floatval Pointer to a float variable. That variable will contain the
f3f19d11	339	* result value upon parsing success. Must not be NULL.
b02bb45f	340	* @param analog Pointer to a struct sr_datafeed_analog. The struct will be
6c701476	341	* filled with data according to the protocol packet.
93357bc3	342	* Must not be NULL.
8c1adf37	343	* @param info Pointer to a struct fs9721_info. The struct will be filled
93357bc3	344	* with data according to the protocol packet. Must not be NULL.
6c701476 UH	345	*
	346	* @return SR_OK upon success, SR_ERR upon failure. Upon errors, the
	347	* 'analog' variable contents are undefined and should not be used.
	348	*/
8c1adf37	349	SR_PRIV int sr_fs9721_parse(const uint8_t buf, float floatval,
b02bb45f	350	struct sr_datafeed_analog analog, void info)
6c701476 UH	351	{
6c701476 UH	352	int ret;
93357bc3 UH	353	struct fs9721_info *info_local;
	354
	355	info_local = (struct fs9721_info *)info;
6c701476 UH	356
6c701476 UH	357	if ((ret = parse_value(buf, floatval)) != SR_OK) {
ec5186f9	358	sr_dbg("Error parsing value: %d.", ret);
6c701476 UH	359	return ret;
	360	}
	361
93357bc3 UH	362	parse_flags(buf, info_local);
93357bc3 UH	363	handle_flags(analog, floatval, info_local);
6c701476 UH	364
	365	return SR_OK;
	366	}
48535594	367
b02bb45f	368	SR_PRIV void sr_fs9721_00_temp_c(struct sr_datafeed_analog analog, void info)
48535594 UH	369	{
	370	struct fs9721_info *info_local;
	371
	372	info_local = (struct fs9721_info *)info;
	373
	374	/* User-defined FS9721_LP3 flag 'c2c1_00' means temperature (C). */
	375	if (info_local->is_c2c1_00) {
b02bb45f UH	376	analog->meaning->mq = SR_MQ_TEMPERATURE;
b02bb45f UH	377	analog->meaning->unit = SR_UNIT_CELSIUS;
48535594 UH	378	}
48535594 UH	379	}
2451a20f	380
b02bb45f	381	SR_PRIV void sr_fs9721_01_temp_c(struct sr_datafeed_analog analog, void info)
2451a20f UH	382	{
	383	struct fs9721_info *info_local;
	384
	385	info_local = (struct fs9721_info *)info;
	386
	387	/* User-defined FS9721_LP3 flag 'c2c1_01' means temperature (C). */
	388	if (info_local->is_c2c1_01) {
b02bb45f UH	389	analog->meaning->mq = SR_MQ_TEMPERATURE;
b02bb45f UH	390	analog->meaning->unit = SR_UNIT_CELSIUS;
2451a20f UH	391	}
	392	}
	393
b02bb45f	394	SR_PRIV void sr_fs9721_10_temp_c(struct sr_datafeed_analog analog, void info)
2451a20f UH	395	{
	396	struct fs9721_info *info_local;
	397
	398	info_local = (struct fs9721_info *)info;
	399
	400	/* User-defined FS9721_LP3 flag 'c2c1_10' means temperature (C). */
	401	if (info_local->is_c2c1_10) {
b02bb45f UH	402	analog->meaning->mq = SR_MQ_TEMPERATURE;
b02bb45f UH	403	analog->meaning->unit = SR_UNIT_CELSIUS;
2451a20f UH	404	}
	405	}
	406
b02bb45f	407	SR_PRIV void sr_fs9721_01_10_temp_f_c(struct sr_datafeed_analog analog, void info)
2451a20f UH	408	{
	409	struct fs9721_info *info_local;
	410
	411	info_local = (struct fs9721_info *)info;
	412
	413	/* User-defined FS9721_LP3 flag 'c2c1_01' means temperature (F). */
	414	if (info_local->is_c2c1_01) {
b02bb45f UH	415	analog->meaning->mq = SR_MQ_TEMPERATURE;
b02bb45f UH	416	analog->meaning->unit = SR_UNIT_FAHRENHEIT;
2451a20f UH	417	}
	418
	419	/* User-defined FS9721_LP3 flag 'c2c1_10' means temperature (C). */
	420	if (info_local->is_c2c1_10) {
b02bb45f UH	421	analog->meaning->mq = SR_MQ_TEMPERATURE;
b02bb45f UH	422	analog->meaning->unit = SR_UNIT_CELSIUS;
2451a20f UH	423	}
2451a20f UH	424	}
d327972b	425
b02bb45f	426	SR_PRIV void sr_fs9721_max_c_min(struct sr_datafeed_analog analog, void info)
d327972b UH	427	{
	428	struct fs9721_info *info_local;
	429
	430	info_local = (struct fs9721_info *)info;
	431
	432	/* User-defined FS9721_LP3 flag 'c2c1_00' means MAX. */
	433	if (info_local->is_c2c1_00)
b02bb45f	434	analog->meaning->mqflags \|= SR_MQFLAG_MAX;
d327972b UH	435
	436	/* User-defined FS9721_LP3 flag 'c2c1_01' means temperature (C). */
	437	if (info_local->is_c2c1_01) {
b02bb45f UH	438	analog->meaning->mq = SR_MQ_TEMPERATURE;
b02bb45f UH	439	analog->meaning->unit = SR_UNIT_CELSIUS;
d327972b UH	440	}
	441
	442	/* User-defined FS9721_LP3 flag 'c2c1_11' means MIN. */
	443	if (info_local->is_c2c1_11)
b02bb45f	444	analog->meaning->mqflags \|= SR_MQFLAG_MIN;
d327972b UH	445
d327972b UH	446	}