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Testing external clock detection and auto-switch

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Simplified audio spectrum computation and transfer
ACARS RX in debug mode
Disabled ABI warnings
Updated binary
This commit is contained in:
furrtek
2018-06-12 07:55:12 +01:00
parent dc5d6fef70
commit 609235b19f
30 changed files with 318 additions and 182 deletions
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firmware/baseband/proc_acars.hpp
+51 -11
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@@ -28,8 +28,6 @@
#include "rssi_thread.hpp"
#include "dsp_decimate.hpp"
#include "dsp_demodulate.hpp"
//#include "audio_compressor.hpp"
#include "spectrum_collector.hpp"
@@ -53,7 +51,48 @@
#include <cstddef>
#include <bitset>
#include "ais_baseband.hpp"
// AIS:
// IN: 2457600/8/8 = 38400
// Offset: 2457600/4 = 614400 (614400/8/8 = 9600)
// Deviation: 2400
// Symbol: 9600
// Decimate: 2
// 4 taps, 1 symbol, 1/4 cycle
// TPMS:
// IN: 2457600/4/2 = 307200
// Offset: 2457600/4 = 614400 (614400/4/2 = 76800)
// Deviation: 38400
// Symbol: 19200
// Decimate: 8
// 16 taps, 1 symbol, 2 cycles
// ACARS:
// IN: 2457600/8/8 = 38400
// Offset: 2457600/4 = 614400 (614400/8/8 = 9600)
// Deviation: ???
// Symbol: 2400
// Decimate: 8
// 16 taps, 1 symbol, 2 cycles
// Number of taps: size of one symbol in samples (in/symbol)
// Cycles:
// Translate+rectangular filter
// sample=38.4k, deviation=4800, symbol=2400
// Length: 16 taps, 1 symbol, 2 cycles of sinusoid
// This is actually the same as rect_taps_307k2_38k4_1t_19k2_p
constexpr std::array<std::complex<float>, 16> rect_taps_38k4_4k8_1t_2k4_p { {
{ 6.2500000000e-02f, 0.0000000000e+00f }, { 4.4194173824e-02f, 4.4194173824e-02f },
{ 0.0000000000e+00f, 6.2500000000e-02f }, { -4.4194173824e-02f, 4.4194173824e-02f },
{ -6.2500000000e-02f, 0.0000000000e+00f }, { -4.4194173824e-02f, -4.4194173824e-02f },
{ 0.0000000000e+00f, -6.2500000000e-02f }, { 4.4194173824e-02f, -4.4194173824e-02f },
{ 6.2500000000e-02f, 0.0000000000e+00f }, { 4.4194173824e-02f, 4.4194173824e-02f },
{ 0.0000000000e+00f, 6.2500000000e-02f }, { -4.4194173824e-02f, 4.4194173824e-02f },
{ -6.2500000000e-02f, 0.0000000000e+00f }, { -4.4194173824e-02f, -4.4194173824e-02f },
{ 0.0000000000e+00f, -6.2500000000e-02f }, { 4.4194173824e-02f, -4.4194173824e-02f },
} };
class ACARSProcessor : public BasebandProcessor {
public:
@@ -73,23 +112,24 @@ private:
dst.size()
};
dsp::decimate::FIRC8xR16x24FS4Decim8 decim_0 { };
dsp::decimate::FIRC8xR16x24FS4Decim8 decim_0 { }; // Translate already done here !
dsp::decimate::FIRC16xR16x32Decim8 decim_1 { };
dsp::matched_filter::MatchedFilter mf { baseband::ais::square_taps_38k4_1t_p, 2 };
dsp::matched_filter::MatchedFilter mf { rect_taps_38k4_4k8_1t_2k4_p, 8 };
clock_recovery::ClockRecovery<clock_recovery::FixedErrorFilter> clock_recovery {
19200, 2400, { 0.0555f },
4800, 2400, { 0.0555f },
[this](const float symbol) { this->consume_symbol(symbol); }
};
symbol_coding::NRZIDecoder nrzi_decode { };
PacketBuilder<BitPattern, NeverMatch, BitPattern> packet_builder {
{ 0b1001011010010110, 16, 1 }, // SYN, SYN
symbol_coding::ACARSDecoder acars_decode { };
/*PacketBuilder<BitPattern, NeverMatch, FixedLength> packet_builder {
{ 0b011010000110100010000000, 24, 1 }, // SYN, SYN, SOH
{ },
{ 0b11111111, 8, 1 },
{ 128 },
[this](const baseband::Packet& packet) {
this->payload_handler(packet);
}
};
};*/
baseband::Packet packet { };
void consume_symbol(const float symbol);
void payload_handler(const baseband::Packet& packet);