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This commit is contained in:
furrtek
2016-01-31 09:34:24 +01:00
parent 29ec87a9ad
commit 44638e504b
166 changed files with 8700 additions and 3967 deletions
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55
firmware/baseband/proc_tpms.hpp
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@@ -30,6 +30,7 @@
#include "clock_recovery.hpp"
#include "symbol_coding.hpp"
#include "packet_builder.hpp"
#include "baseband_packet.hpp"
#include "message.hpp"
@@ -37,39 +38,37 @@
#include <cstddef>
#include <bitset>
struct NeverMatch {
bool operator()(const BitHistory&, const size_t) const {
return false;
}
};
struct FixedLength {
bool operator()(const BitHistory&, const size_t symbols_received) const {
return symbols_received >= length;
}
const size_t length;
};
// Translate+rectangular filter
// sample=153.6k, deviation=38400, symbol=19200
// Length: 8 taps, 1 symbols, 2 cycles of sinusoid
constexpr std::array<std::complex<float>, 8> rect_taps_153k6_1t_p { {
{ 1.2500000000e-01f, 0.0000000000e+00f }, { 7.6540424947e-18f, 1.2500000000e-01f },
{ -1.2500000000e-01f, 1.5308084989e-17f }, { -2.2962127484e-17f, -1.2500000000e-01f },
{ 1.2500000000e-01f, -3.0616169979e-17f }, { 3.8270212473e-17f, 1.2500000000e-01f },
{ -1.2500000000e-01f, 4.5924254968e-17f }, { -5.3578297463e-17f, -1.2500000000e-01f },
// sample=307.2k, deviation=38400, symbol=19200
// Length: 16 taps, 1 symbols, 2 cycles of sinusoid
constexpr std::array<std::complex<float>, 16> rect_taps_307k2_1t_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 TPMSProcessor : public BasebandProcessor {
public:
using payload_t = std::bitset<1024>;
TPMSProcessor();
void execute(buffer_c8_t buffer) override;
void execute(const buffer_c8_t& buffer) override;
private:
ChannelDecimator decimator { ChannelDecimator::DecimationFactor::By16 };
dsp::matched_filter::MatchedFilter mf { rect_taps_153k6_1t_p, 4 };
std::array<complex16_t, 512> dst;
const buffer_c16_t dst_buffer {
dst.data(),
dst.size()
};
dsp::decimate::FIRC8xR16x24FS4Decim4 decim_0;
dsp::decimate::FIRC16xR16x16Decim2 decim_1;
dsp::matched_filter::MatchedFilter mf { rect_taps_307k2_1t_p, 8 };
clock_recovery::ClockRecovery<clock_recovery::FixedErrorFilter> clock_recovery {
38400, 19200, { 0.0555f },
@@ -79,13 +78,13 @@ private:
{ 0b010101010101010101010101010110, 30, 1 },
{ },
{ 256 },
[this](const payload_t& payload, const size_t bits_received) {
this->payload_handler(payload, bits_received);
[this](const baseband::Packet& packet) {
this->payload_handler(packet);
}
};
void consume_symbol(const float symbol);
void payload_handler(const payload_t& payload, const size_t bits_received);
void payload_handler(const baseband::Packet& packet);
};
#endif/*__PROC_TPMS_H__*/