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https://github.com/portapack-mayhem/mayhem-firmware.git
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802ac496e9
Xylos TX (CCIR tones) ;) Jammer update, still buggy and inefficient SD card module loader update
106 lines
2.3 KiB
C++
106 lines
2.3 KiB
C++
/*
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* Copyright (C) 2014 Jared Boone, ShareBrained Technology, Inc.
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*
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* This file is part of PortaPack.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; see the file COPYING. If not, write to
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* the Free Software Foundation, Inc., 51 Franklin Street,
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* Boston, MA 02110-1301, USA.
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*/
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#include "proc_jammer.hpp"
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#include "portapack_shared_memory.hpp"
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#include "sine_table.hpp"
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#include <cstdint>
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#define POLY_MASK_32 0xB4BCD35C
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void JammerProcessor::execute(buffer_c8_t buffer) {
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for (size_t i = 0; i<buffer.count; i++) {
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/*if (s > 3000000) {
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s = 0;
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feedback = lfsr & 1;
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lfsr >>= 1;
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if (feedback == 1)
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lfsr ^= POLY_MASK_32;
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} else {
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s++;
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}
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aphase += lfsr;*/
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/*if (s >= 10) {
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s = 0;
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aphase += 353205; // DEBUG
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} else {
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s++;
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}
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sample = sintab[(aphase & 0x03FF0000)>>16];*/
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// Duration timer
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//
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if (s >= 10000) { //shared_memory.jammer_ranges[ir].duration
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s = 0;
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for (;;) {
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ir++;
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if (ir > 15) ir = 0;
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if (shared_memory.jammer_ranges[ir].active == true) break;
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}
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jammer_bw = shared_memory.jammer_ranges[ir].width / 2;
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message.freq = shared_memory.jammer_ranges[ir].center;
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shared_memory.application_queue.push(message);
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} else {
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s++;
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}
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// Ramp
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/*if (r >= 10) {
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if (sample < 128)
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sample++;
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else
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sample = -127;
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r = 0;
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} else {
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r++;
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}*/
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// Phase
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if (r >= 70) {
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aphase += ((aphase>>4) ^ 0x4573) << 14;
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r = 0;
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} else {
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r++;
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}
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aphase += 8830;
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sample = sine_table_f32[(aphase & 0x03FF0000)>>18]*256;
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//FM
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frq = sample * jammer_bw; // Bandwidth
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phase = (phase + frq);
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sphase = phase + (256<<16);
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re = sine_table_f32[(sphase & 0x03FF0000)>>18]*127;
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im = sine_table_f32[(phase & 0x03FF0000)>>18]*127;
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buffer.p[i] = {(int8_t)re,(int8_t)im};
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}
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};
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