- improved sync

git-svn-id: http://moon:8086/svn/software/trunk/libsrc/cpp@1081 b431acfa-c32f-4a4a-93f1-934dc6c82436
2022-06-26 08:23:59 +00:00
parent 607c4ec647
commit b2e77d4be2
2 changed files with 116 additions and 39 deletions
@@ -9,12 +9,20 @@

 class DeSymbolizer : public Processor::Block
 {
+	enum State
+	{
+		Idle,
+		Acq,
+		Trk
+	};
+
+	static const size_t SYNC_COUNTER_RELOAD = 3;
+
 public:
 	DeSymbolizer();
 	virtual ~DeSymbolizer() = default;

-	void setNumBitsPerSymbol(uint32_t nBitsPerSym);
-	void process(symbol_t src);
+	void setNumBitsPerSymbol(size_t nBitsPerSym);

 	// Processor::Block
 	void prepare() override;
@@ -27,9 +35,18 @@ private:
 	symbol_t m_lastSymbol;
 	symbol_t m_symbolMask;
 	symbol_t differentialDecode(symbol_t symbol);
+	State m_state;
+	size_t m_sync_dist;
+	size_t m_sync_dist_last;
+	size_t m_sync_counter;
+	uint8_t m_delay[2];
+
 	Processor::Buffer<symbol_t> *m_buf_in;
 	Processor::Buffer<uint8_t> *m_buf_out;
-
+	void process(symbol_t symbol);
+	void sync(symbol_t symbol);
+	uint8_t sym2byte(symbol_t symbol);
+	bool is_preamble(uint16_t data);
 };

 // --------------------------------------------------------------