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Started work on ADS-B TX baseband processor

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furrtek 2016-12-01 06:58:47 +01:00
parent 596071e8f8
commit ef0feae62b
15 changed files with 413 additions and 82 deletions
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67
firmware/baseband/proc_jammer.cpp
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@ -1,5 +1,6 @@
/*
* Copyright (C) 2014 Jared Boone, ShareBrained Technology, Inc.
* Copyright (C) 2016 Furrtek
*
* This file is part of PortaPack.
*
@ -21,7 +22,7 @@
#include "proc_jammer.hpp"
#include "portapack_shared_memory.hpp"
#include "sine_table.hpp"
#include "sine_table_int8.hpp"
#include "event_m4.hpp"
#include <cstdint>
@ -29,6 +30,9 @@
#define POLY_MASK_32 0xB4BCD35C
void JammerProcessor::execute(const buffer_c8_t& buffer) {
if (!configured) return;
for (size_t i = 0; i<buffer.count; i++) {
if (s >= 10000) { //shared_memory.jammer_ranges[ir].duration
@ -66,21 +70,68 @@ void JammerProcessor::execute(const buffer_c8_t& buffer) {
}
aphase += 8830;
sample = sine_table_f32[(aphase & 0x03FF0000)>>18]*256;
sample = sine_table_i8[(sphase & 0x03FC0000) >> 18];
//FM
frq = sample * jammer_bw; // Bandwidth
// FM
frq = sample * jammer_bw;
phase = (phase + frq);
sphase = phase + (256<<16);
sphase = phase + (64 << 18);
re = sine_table_f32[(sphase & 0x03FF0000)>>18]*127;
im = sine_table_f32[(phase & 0x03FF0000)>>18]*127;
re = (sine_table_i8[(sphase & 0x03FC0000) >> 18]);
im = (sine_table_i8[(phase & 0x03FC0000) >> 18]);
buffer.p[i] = {(int8_t)re,(int8_t)im};
buffer.p[i] = {(int8_t)re, (int8_t)im};
}
};
void JammerProcessor::on_message(const Message* const msg) {
/*const auto message = *reinterpret_cast<const DTMFTXConfigMessage*>(msg);
if (message.id == Message::ID::DTMFTXConfig) {
// Translate DTMF message to index in DTMF frequencies table
tone_ptr = &shared_memory.tx_data[0];
for (;;) {
tone_code = *tone_ptr;
if (tone_code == 0xFF)
break; // End of message
else if (tone_code <= 9)
// That's already fine bro.
*tone_ptr = tone_code;
else if (tone_code == 'A')
*tone_ptr = 10;
else if (tone_code == 'B')
*tone_ptr = 11;
else if (tone_code == 'C')
*tone_ptr = 12;
else if (tone_code == 'D')
*tone_ptr = 13;
else if (tone_code == '#')
*tone_ptr = 14;
else if (tone_code == '*')
*tone_ptr = 15;
else {
*tone_ptr = 0xFF; // Invalid character, stop here
}
tone_ptr++;
}
// 1<<18 = 262144
// m = (262144 * a) / 1536000
// a = 262144 / 1536000 (*1000 = 171)
bw = 171 * (message.bw);
tone_length = message.tone_length * 154; // 153.6
pause_length = message.pause_length * 154; // 153.6
as = 0;
tone = false;
timer = 0;
tone_idx = 0;
configured = true;
}*/
}
int main() {
EventDispatcher event_dispatcher { std::make_unique<JammerProcessor>() };
event_dispatcher.run();