mirror of
https://github.com/eried/portapack-mayhem.git
synced 2024-10-01 01:26:06 -04:00
131 lines
3.3 KiB
C++
131 lines
3.3 KiB
C++
/*
|
|
* Copyright (C) 2015 Jared Boone, ShareBrained Technology, Inc.
|
|
* Copyright (C) 2017 Furrtek
|
|
*
|
|
* This file is part of PortaPack.
|
|
*
|
|
* 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, 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; see the file COPYING. If not, write to
|
|
* the Free Software Foundation, Inc., 51 Franklin Street,
|
|
* Boston, MA 02110-1301, USA.
|
|
*/
|
|
|
|
#include "sonde_packet.hpp"
|
|
#include "string_format.hpp"
|
|
|
|
namespace sonde {
|
|
|
|
size_t Packet::length() const {
|
|
return decoder_.symbols_count();
|
|
}
|
|
|
|
bool Packet::is_valid() const {
|
|
return true;
|
|
}
|
|
|
|
Timestamp Packet::received_at() const {
|
|
return packet_.timestamp();
|
|
}
|
|
|
|
Packet::Type Packet::type() const {
|
|
return type_;
|
|
}
|
|
|
|
uint32_t Packet::GPS_altitude() const {
|
|
return (reader_.read(22 * 8, 32) / 1000) - 48;
|
|
}
|
|
|
|
float Packet::GPS_latitude() const {
|
|
return reader_.read(14 * 8, 32) / ((1ULL << 32) / 360.0);
|
|
}
|
|
|
|
float Packet::GPS_longitude() const {
|
|
return reader_.read(18 * 8, 32) / ((1ULL << 32) / 360.0);
|
|
}
|
|
|
|
uint32_t Packet::battery_voltage() const {
|
|
return (reader_.read(69 * 8, 8) + (reader_.read(70 * 8, 8) << 8)) * 1000 / 150;
|
|
}
|
|
|
|
std::string Packet::signature() const {
|
|
const auto header = reader_.read(0, 24);
|
|
|
|
if (header == 0x649F20)
|
|
return "M10";
|
|
else if (header == 0x648F20)
|
|
return "M2K2";
|
|
else
|
|
return "0x" + symbols_formatted().data.substr(0, 6);
|
|
}
|
|
|
|
std::string Packet::serial_number() const {
|
|
if (type() == Type::M10) {
|
|
// See https://github.com/rs1729/RS/blob/master/m10/m10x.c line 606
|
|
// Starting at byte #93: 00000000 11111111 22222222 33333333 44444444
|
|
// CCCC AAAABBBB
|
|
// 44444444 33333333
|
|
// DDDEEEEE EEEEEEEE
|
|
|
|
return to_string_hex(reader_.read(93 * 8 + 16, 4), 1) +
|
|
to_string_dec_uint(reader_.read(93 * 8 + 20, 4), 2, '0') + " " +
|
|
to_string_hex(reader_.read(93 * 8 + 4, 4), 1) + " " +
|
|
to_string_dec_uint(reader_.read(93 * 8 + 24, 3), 1) +
|
|
to_string_dec_uint(reader_.read(93 * 8 + 27, 13), 4, '0');
|
|
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
FormattedSymbols Packet::symbols_formatted() const {
|
|
return format_symbols(decoder_);
|
|
}
|
|
|
|
bool Packet::crc_ok() const {
|
|
switch(type()) {
|
|
case Type::M10: return crc_ok_M10();
|
|
default: return false;
|
|
}
|
|
}
|
|
|
|
bool Packet::crc_ok_M10() const {
|
|
uint16_t cs { 0 };
|
|
uint32_t c0, c1, t, t6, t7, s,b ;
|
|
|
|
for (size_t i = 0; i < packet_.size(); i++) {
|
|
b = packet_[i];
|
|
c1 = cs & 0xFF;
|
|
|
|
// B
|
|
b = (b >> 1) | ((b & 1) << 7);
|
|
b ^= (b >> 2) & 0xFF;
|
|
|
|
// A1
|
|
t6 = (cs & 1) ^ ((cs >> 2) & 1) ^ ((cs >> 4) & 1);
|
|
t7 = ((cs >> 1) & 1) ^ ((cs >> 3) & 1) ^ ((cs >> 5) & 1);
|
|
t = (cs & 0x3F) | (t6 << 6) | (t7 << 7);
|
|
|
|
// A2
|
|
s = (cs >> 7) & 0xFF;
|
|
s ^= (s >> 2) & 0xFF;
|
|
|
|
c0 = b ^ t ^ s;
|
|
|
|
cs = ((c1<<8) | c0) & 0xFFFF;
|
|
}
|
|
|
|
return ((cs & 0xFFFF) == ((packet_[0x63] << 8) | (packet_[0x63 + 1])));
|
|
}
|
|
|
|
} /* namespace sonde */
|