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jLynx 2023-05-19 08:16:05 +12:00 • committed by GitHub
parent 7aca7ce74d
commit 033c4e9a5b
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149
firmware/baseband/proc_jammer.cpp
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@ -28,88 +28,87 @@
#include <cstdint>
void JammerProcessor::execute(const buffer_c8_t& buffer) {
if (!configured) return;
for (size_t i = 0; i < buffer.count; i++) {
if (!configured) return;
if (!jammer_duration) {
// Find next enabled range
do {
current_range++;
if (current_range == JAMMER_MAX_CH) current_range = 0;
} while (!jammer_channels[current_range].enabled);
jammer_duration = jammer_channels[current_range].duration;
jammer_bw = jammer_channels[current_range].width / 2; // TODO: Exact value
// Ask for retune
message.freq = jammer_channels[current_range].center;
message.range = current_range;
shared_memory.application_queue.push(message);
} else {
jammer_duration--;
}
// Phase noise
if (!period_counter) {
period_counter = noise_period;
if (noise_type == JammerType::TYPE_FSK) {
sample = (sample + lfsr) >> 1;
} else if (noise_type == JammerType::TYPE_TONE) {
tone_delta = 150000 + (lfsr >> 9); // Approx 100Hz to 6kHz
} else if (noise_type == JammerType::TYPE_SWEEP) {
sample++; // This is like saw wave FM
}
feedback = ((lfsr >> 31) ^ (lfsr >> 29) ^ (lfsr >> 15) ^ (lfsr >> 11)) & 1;
lfsr = (lfsr << 1) | feedback;
if (!lfsr) lfsr = 0x1337; // Shouldn't do this :(
} else {
period_counter--;
}
if (noise_type == JammerType::TYPE_TONE) {
aphase += tone_delta;
sample = sine_table_i8[(aphase & 0xFF000000) >> 24];
}
delta = sample * jammer_bw;
phase += delta;
sphase = phase + (64 << 24);
for (size_t i = 0; i < buffer.count; i++) {
if (!jammer_duration) {
// Find next enabled range
do {
current_range++;
if (current_range == JAMMER_MAX_CH) current_range = 0;
} while (!jammer_channels[current_range].enabled);
re = (sine_table_i8[(sphase & 0xFF000000) >> 24]);
im = (sine_table_i8[(phase & 0xFF000000) >> 24]);
jammer_duration = jammer_channels[current_range].duration;
jammer_bw = jammer_channels[current_range].width / 2; // TODO: Exact value
buffer.p[i] = {re, im};
}
// Ask for retune
message.freq = jammer_channels[current_range].center;
message.range = current_range;
shared_memory.application_queue.push(message);
} else {
jammer_duration--;
}
// Phase noise
if (!period_counter) {
period_counter = noise_period;
if (noise_type == JammerType::TYPE_FSK) {
sample = (sample + lfsr) >> 1;
} else if (noise_type == JammerType::TYPE_TONE) {
tone_delta = 150000 + (lfsr >> 9); // Approx 100Hz to 6kHz
} else if (noise_type == JammerType::TYPE_SWEEP) {
sample++; // This is like saw wave FM
}
feedback = ((lfsr >> 31) ^ (lfsr >> 29) ^ (lfsr >> 15) ^ (lfsr >> 11)) & 1;
lfsr = (lfsr << 1) | feedback;
if (!lfsr) lfsr = 0x1337; // Shouldn't do this :(
} else {
period_counter--;
}
if (noise_type == JammerType::TYPE_TONE) {
aphase += tone_delta;
sample = sine_table_i8[(aphase & 0xFF000000) >> 24];
}
delta = sample * jammer_bw;
phase += delta;
sphase = phase + (64 << 24);
re = (sine_table_i8[(sphase & 0xFF000000) >> 24]);
im = (sine_table_i8[(phase & 0xFF000000) >> 24]);
buffer.p[i] = {re, im};
}
};
void JammerProcessor::on_message(const Message* const msg) {
if (msg->id == Message::ID::JammerConfigure) {
const auto message = *reinterpret_cast<const JammerConfigureMessage*>(msg);
if (message.run) {
jammer_channels = (JammerChannel*)shared_memory.bb_data.data;
noise_type = message.type;
noise_period = 3072000 / message.speed;
if (noise_type == JammerType::TYPE_SWEEP)
noise_period >>= 8;
period_counter = 0;
jammer_duration = 0;
current_range = 0;
lfsr = 0xDEAD0012;
configured = true;
} else {
configured = false;
}
}
if (msg->id == Message::ID::JammerConfigure) {
const auto message = *reinterpret_cast<const JammerConfigureMessage*>(msg);
if (message.run) {
jammer_channels = (JammerChannel*)shared_memory.bb_data.data;
noise_type = message.type;
noise_period = 3072000 / message.speed;
if (noise_type == JammerType::TYPE_SWEEP)
noise_period >>= 8;
period_counter = 0;
jammer_duration = 0;
current_range = 0;
lfsr = 0xDEAD0012;
configured = true;
} else {
configured = false;
}
}
}
int main() {
EventDispatcher event_dispatcher { std::make_unique<JammerProcessor>() };
event_dispatcher.run();
return 0;
EventDispatcher event_dispatcher{std::make_unique<JammerProcessor>()};
event_dispatcher.run();
return 0;
}