+++ /dev/null
-/*
- * 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"
-
-#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->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_diode)
- analog->mqflags |= SR_MQFLAG_DIODE;
- 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_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->mq = SR_MQ_TEMPERATURE;
- analog->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->mq = SR_MQ_TEMPERATURE;
- analog->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->mq = SR_MQ_TEMPERATURE;
- analog->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->mq = SR_MQ_TEMPERATURE;
- analog->unit = SR_UNIT_FAHRENHEIT;
- }
-
- /* User-defined FS9721_LP3 flag 'c2c1_10' means temperature (C). */
- if (info_local->is_c2c1_10) {
- analog->mq = SR_MQ_TEMPERATURE;
- analog->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->mqflags |= SR_MQFLAG_MAX;
-
- /* User-defined FS9721_LP3 flag 'c2c1_01' means temperature (C). */
- if (info_local->is_c2c1_01) {
- analog->mq = SR_MQ_TEMPERATURE;
- analog->unit = SR_UNIT_CELSIUS;
- }
-
- /* User-defined FS9721_LP3 flag 'c2c1_11' means MIN. */
- if (info_local->is_c2c1_11)
- analog->mqflags |= SR_MQFLAG_MIN;
-
-}
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