Sync with Sharebrained's fw, only Xylos TX works for now

firmware/baseband/proc_epar.hpp

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+/*
+ * Copyright (C) 2015 Jared Boone, ShareBrained Technology, Inc.
+ * Copyright (C) 2016 Furrtek
+ * 
+ * This file is part of PortaPack.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2, or (at your option)
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; see the file COPYING.  If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street,
+ * Boston, MA 02110-1301, USA.
+ */
+
+#ifndef __PROC_EPAR_H__
+#define __PROC_EPAR_H__
+
+#include "baseband_processor.hpp"
+#include "baseband_thread.hpp"
+
+#include "dsp_decimate.hpp"
+#include "dsp_demodulate.hpp"
+
+#include "audio_output.hpp"
+
+// One bit is 0.005119048s (~200bps ?)
+// Time unit is 0.001706349s (586Hz)
+
+#define EPAR_TU 262-1 		// 1536000/10/586
+#define EPAR_SPACE 33-1
+#define EPAR_REPEAT 26*2	// DEBUG
+
+// 0: 011
+// 1: 001
+
+// Good: 1001110111111
+// Bad:  1100111011111
+
+class EPARProcessor : public BasebandProcessor {
+public:
+	void execute(const buffer_c8_t& buffer) override;
+
+private:
+	bool transmit_done;
+	const int8_t bitdef[2][3] = {
+		{-127, 127, 127},
+		{-127, -127, 127}
+	};
+	int8_t re, im;
+	uint8_t s;
+	uint8_t state_length = 0;
+	uint8_t current_bit = 0;
+	uint8_t current_tu = 0;
+    uint8_t bit_pos = 0;
+    uint8_t repeat_count = 0;
+    uint32_t sample_count = 0;
+	uint32_t aphase, phase, sphase;
+	int32_t sample, frq;
+	uint8_t state = 1;
+	TXDoneMessage message;
+};
+
+#endif