portapack-mayhem/firmware/baseband-tx/proc_tpms.cpp
2016-05-09 20:42:20 +02:00

73 lines
2.2 KiB
C++

/*
* Copyright (C) 2015 Jared Boone, ShareBrained Technology, Inc.
*
* 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 "proc_tpms.hpp"
#include "dsp_fir_taps.hpp"
TPMSProcessor::TPMSProcessor() {
decim_0.configure(taps_200k_decim_0.taps, 33554432);
decim_1.configure(taps_200k_decim_1.taps, 131072);
}
void TPMSProcessor::execute(const buffer_c8_t& buffer) {
/* 2.4576MHz, 2048 samples */
const auto decim_0_out = decim_0.execute(buffer, dst_buffer);
const auto decim_1_out = decim_1.execute(decim_0_out, dst_buffer);
const auto decimator_out = decim_1_out;
/* 307.2kHz, 256 samples */
feed_channel_stats(decimator_out);
for(size_t i=0; i<decimator_out.count; i++) {
if( mf.execute_once(decimator_out.p[i]) ) {
clock_recovery(mf.get_output());
}
}
for(size_t i=0; i<decim_1_out.count; i+=channel_decimation) {
const auto sliced = ook_slicer_5sps(decim_1_out.p[i]);
slicer_history = (slicer_history << 1) | sliced;
ook_clock_recovery_subaru(slicer_history, [this](const bool symbol) {
this->packet_builder_ook_subaru.execute(symbol);
});
ook_clock_recovery_gmc(slicer_history, [this](const bool symbol) {
this->packet_builder_ook_gmc.execute(symbol);
});
}
}
void TPMSProcessor::consume_symbol(
const float raw_symbol
) {
const uint_fast8_t sliced_symbol = (raw_symbol >= 0.0f) ? 1 : 0;
packet_builder.execute(sliced_symbol);
}
void TPMSProcessor::payload_handler(
const baseband::Packet& packet
) {
const TPMSPacketMessage message { tpms::SignalType::FLM, packet };
shared_memory.application_queue.push(message);
}