mirror of
https://github.com/eried/portapack-mayhem.git
synced 2024-12-30 17:56:33 -05:00
291 lines
12 KiB
C++
291 lines
12 KiB
C++
/*
|
|
* Copyright (C) 2015 Jared Boone, ShareBrained Technology, Inc.
|
|
* Copyright (C) 2016 Furrtek
|
|
* Copyright (C) 2020 Shao
|
|
*
|
|
* 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_btlerx.hpp"
|
|
#include "portapack_shared_memory.hpp"
|
|
|
|
#include "event_m4.hpp"
|
|
|
|
void BTLERxProcessor::execute(const buffer_c8_t& buffer) {
|
|
if (!configured) return;
|
|
|
|
// FM demodulation
|
|
|
|
/*const auto decim_0_out = decim_0.execute(buffer, dst_buffer);
|
|
const auto channel = decim_1.execute(decim_0_out, dst_buffer);
|
|
|
|
feed_channel_stats(channel);
|
|
|
|
auto audio_oversampled = demod.execute(channel, work_audio_buffer);*/
|
|
|
|
const auto decim_0_out = decim_0.execute(buffer, dst_buffer);
|
|
feed_channel_stats(decim_0_out);
|
|
|
|
auto audio_oversampled = demod.execute(decim_0_out, work_audio_buffer);
|
|
|
|
/*std::fill(spectrum.begin(), spectrum.end(), 0);
|
|
for(size_t i=0; i<spectrum.size(); i++) {
|
|
spectrum[i] += buffer.p[i];
|
|
}
|
|
const buffer_c16_t buffer_c16 {spectrum.data(),spectrum.size(),buffer.sampling_rate};
|
|
feed_channel_stats(buffer_c16);
|
|
|
|
auto audio_oversampled = demod.execute(buffer_c16, work_audio_buffer);*/
|
|
// Audio signal processing
|
|
for (size_t c = 0; c < audio_oversampled.count; c++) {
|
|
/*const int32_t sample_int = audio_oversampled.p[c] * 32768.0f;
|
|
int32_t current_sample = __SSAT(sample_int, 16);
|
|
current_sample /= 128;*/
|
|
|
|
int32_t current_sample = audio_oversampled.p[c]; // if I directly use this, some results can pass crc but not correct.
|
|
rb_head++;
|
|
rb_head = (rb_head) % RB_SIZE;
|
|
|
|
rb_buf[rb_head] = current_sample;
|
|
|
|
skipSamples = skipSamples - 1;
|
|
|
|
if (skipSamples < 1) {
|
|
int32_t threshold_tmp = 0;
|
|
for (int c = 0; c < 8; c++) {
|
|
threshold_tmp = threshold_tmp + (int32_t)rb_buf[(rb_head + c) % RB_SIZE];
|
|
}
|
|
g_threshold = (int32_t)threshold_tmp / 8;
|
|
|
|
int transitions = 0;
|
|
if (rb_buf[(rb_head + 9) % RB_SIZE] > g_threshold) {
|
|
for (int c = 0; c < 8; c++) {
|
|
if (rb_buf[(rb_head + c) % RB_SIZE] > rb_buf[(rb_head + c + 1) % RB_SIZE])
|
|
transitions = transitions + 1;
|
|
}
|
|
} else {
|
|
for (int c = 0; c < 8; c++) {
|
|
if (rb_buf[(rb_head + c) % RB_SIZE] < rb_buf[(rb_head + c + 1) % RB_SIZE])
|
|
transitions = transitions + 1;
|
|
}
|
|
}
|
|
|
|
bool packet_detected = false;
|
|
// if ( transitions==4 && abs(g_threshold)<15500)
|
|
if (transitions == 4) {
|
|
uint8_t packet_data[500];
|
|
int packet_length;
|
|
uint32_t packet_crc;
|
|
// uint32_t calced_crc; // NOTE: restore when CRC is passing
|
|
uint64_t packet_addr_l;
|
|
// uint32_t result; // NOTE: restore when CRC is passing
|
|
uint8_t crc[3];
|
|
uint8_t packet_header_arr[2];
|
|
|
|
packet_addr_l = 0;
|
|
for (int i = 0; i < 4; i++) {
|
|
bool current_bit;
|
|
uint8_t byte = 0;
|
|
for (int c = 0; c < 8; c++) {
|
|
if (rb_buf[(rb_head + (i + 1) * 8 + c) % RB_SIZE] > g_threshold)
|
|
current_bit = true;
|
|
else
|
|
current_bit = false;
|
|
byte |= current_bit << (7 - c);
|
|
}
|
|
uint8_t byte_temp = (uint8_t)(((byte * 0x0802LU & 0x22110LU) | (byte * 0x8020LU & 0x88440LU)) * 0x10101LU >> 16);
|
|
packet_addr_l |= ((uint64_t)byte_temp) << (8 * i);
|
|
}
|
|
|
|
channel_number = 38;
|
|
|
|
for (int t = 0; t < 2; t++) {
|
|
bool current_bit;
|
|
uint8_t byte = 0;
|
|
for (int c = 0; c < 8; c++) {
|
|
if (rb_buf[(rb_head + 5 * 8 + t * 8 + c) % RB_SIZE] > g_threshold)
|
|
current_bit = true;
|
|
else
|
|
current_bit = false;
|
|
byte |= current_bit << (7 - c);
|
|
}
|
|
|
|
packet_header_arr[t] = byte;
|
|
}
|
|
|
|
uint8_t byte_temp2 = (uint8_t)(((channel_number * 0x0802LU & 0x22110LU) | (channel_number * 0x8020LU & 0x88440LU)) * 0x10101LU >> 16);
|
|
uint8_t lfsr_1 = byte_temp2 | 2;
|
|
int header_length = 2;
|
|
int header_counter = 0;
|
|
while (header_length--) {
|
|
for (uint8_t i = 0x80; i; i >>= 1) {
|
|
if (lfsr_1 & 0x80) {
|
|
lfsr_1 ^= 0x11;
|
|
(packet_header_arr[header_counter]) ^= i;
|
|
}
|
|
lfsr_1 <<= 1;
|
|
}
|
|
header_counter = header_counter + 1;
|
|
}
|
|
|
|
if (packet_addr_l == 0x8E89BED6) {
|
|
uint8_t byte_temp3 = (uint8_t)(((packet_header_arr[1] * 0x0802LU & 0x22110LU) | (packet_header_arr[1] * 0x8020LU & 0x88440LU)) * 0x10101LU >> 16);
|
|
packet_length = byte_temp3 & 0x3F;
|
|
|
|
} else {
|
|
packet_length = 0;
|
|
}
|
|
|
|
for (int t = 0; t < packet_length + 2 + 3; t++) {
|
|
bool current_bit;
|
|
uint8_t byte = 0;
|
|
for (int c = 0; c < 8; c++) {
|
|
if (rb_buf[(rb_head + 5 * 8 + t * 8 + c) % RB_SIZE] > g_threshold)
|
|
current_bit = true;
|
|
else
|
|
current_bit = false;
|
|
byte |= current_bit << (7 - c);
|
|
}
|
|
|
|
packet_data[t] = byte;
|
|
}
|
|
|
|
uint8_t byte_temp4 = (uint8_t)(((channel_number * 0x0802LU & 0x22110LU) | (channel_number * 0x8020LU & 0x88440LU)) * 0x10101LU >> 16);
|
|
uint8_t lfsr_2 = byte_temp4 | 2;
|
|
int pdu_crc_length = packet_length + 2 + 3;
|
|
int pdu_crc_counter = 0;
|
|
while (pdu_crc_length--) {
|
|
for (uint8_t i = 0x80; i; i >>= 1) {
|
|
if (lfsr_2 & 0x80) {
|
|
lfsr_2 ^= 0x11;
|
|
(packet_data[pdu_crc_counter]) ^= i;
|
|
}
|
|
lfsr_2 <<= 1;
|
|
}
|
|
pdu_crc_counter = pdu_crc_counter + 1;
|
|
}
|
|
|
|
if (packet_addr_l == 0x8E89BED6) {
|
|
crc[0] = crc[1] = crc[2] = 0x55;
|
|
} else {
|
|
crc[0] = crc[1] = crc[2] = 0;
|
|
}
|
|
|
|
uint8_t v, t, d, crc_length;
|
|
uint32_t crc_result = 0;
|
|
crc_length = packet_length + 2;
|
|
int counter = 0;
|
|
while (crc_length--) {
|
|
uint8_t byte_temp5 = (uint8_t)(((packet_data[counter] * 0x0802LU & 0x22110LU) | (packet_data[counter] * 0x8020LU & 0x88440LU)) * 0x10101LU >> 16);
|
|
d = byte_temp5;
|
|
for (v = 0; v < 8; v++, d >>= 1) {
|
|
t = crc[0] >> 7;
|
|
crc[0] <<= 1;
|
|
if (crc[1] & 0x80) crc[0] |= 1;
|
|
crc[1] <<= 1;
|
|
if (crc[2] & 0x80) crc[1] |= 1;
|
|
crc[2] <<= 1;
|
|
if (t != (d & 1)) {
|
|
crc[2] ^= 0x5B;
|
|
crc[1] ^= 0x06;
|
|
}
|
|
}
|
|
counter = counter + 1;
|
|
}
|
|
for (v = 0; v < 3; v++) crc_result = (crc_result << 8) | crc[v];
|
|
// calced_crc = crc_result; // NOTE: restore when CRC is passing
|
|
|
|
packet_crc = 0;
|
|
for (int c = 0; c < 3; c++) packet_crc = (packet_crc << 8) | packet_data[packet_length + 2 + c];
|
|
|
|
if (packet_addr_l == 0x8E89BED6)
|
|
// if (packet_crc==calced_crc) // NOTE: restore when CRC is passing
|
|
{
|
|
uint8_t mac_data[6];
|
|
int counter = 0;
|
|
for (int i = 7; i >= 2; i--) {
|
|
uint8_t byte_temp6 = (uint8_t)(((packet_data[i] * 0x0802LU & 0x22110LU) | (packet_data[i] * 0x8020LU & 0x88440LU)) * 0x10101LU >> 16);
|
|
// result = byte_temp6; // NOTE: restore when CRC is passing
|
|
mac_data[counter] = byte_temp6;
|
|
counter = counter + 1;
|
|
}
|
|
|
|
data_message.is_data = false;
|
|
data_message.value = 'A';
|
|
shared_memory.application_queue.push(data_message);
|
|
|
|
data_message.is_data = true;
|
|
data_message.value = mac_data[0];
|
|
shared_memory.application_queue.push(data_message);
|
|
|
|
data_message.is_data = true;
|
|
data_message.value = mac_data[1];
|
|
shared_memory.application_queue.push(data_message);
|
|
|
|
data_message.is_data = true;
|
|
data_message.value = mac_data[2];
|
|
shared_memory.application_queue.push(data_message);
|
|
|
|
data_message.is_data = true;
|
|
data_message.value = mac_data[3];
|
|
shared_memory.application_queue.push(data_message);
|
|
|
|
data_message.is_data = true;
|
|
data_message.value = mac_data[4];
|
|
shared_memory.application_queue.push(data_message);
|
|
|
|
data_message.is_data = true;
|
|
data_message.value = mac_data[5];
|
|
shared_memory.application_queue.push(data_message);
|
|
|
|
data_message.is_data = false;
|
|
data_message.value = 'B';
|
|
shared_memory.application_queue.push(data_message);
|
|
|
|
packet_detected = true;
|
|
} else
|
|
packet_detected = false;
|
|
}
|
|
|
|
if (packet_detected) {
|
|
skipSamples = 20;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
void BTLERxProcessor::on_message(const Message* const message) {
|
|
if (message->id == Message::ID::BTLERxConfigure)
|
|
configure(*reinterpret_cast<const BTLERxConfigureMessage*>(message));
|
|
}
|
|
|
|
void BTLERxProcessor::configure(const BTLERxConfigureMessage& message) {
|
|
(void)message; // avoid warning
|
|
decim_0.configure(taps_200k_wfm_decim_0.taps);
|
|
decim_1.configure(taps_200k_wfm_decim_1.taps);
|
|
demod.configure(audio_fs, 5000);
|
|
|
|
configured = true;
|
|
}
|
|
|
|
int main() {
|
|
EventDispatcher event_dispatcher{std::make_unique<BTLERxProcessor>()};
|
|
event_dispatcher.run();
|
|
return 0;
|
|
}
|