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

firmware/baseband/proc_audiotx.cpp

@@ -0,0 +1,59 @@
+/*
+ * 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.
+ */
+
+#include "proc_audiotx.hpp"
+#include "portapack_shared_memory.hpp"
+#include "sine_table.hpp"
+#include "event_m4.hpp"
+
+#include <cstdint>
+
+void AudioTXProcessor::execute(const buffer_c8_t& buffer){
+	
+	for (size_t i = 0; i<buffer.count; i++) {
+		sample = (sine_table_f32[(aphase & 0x03FF0000)>>18]*127);	//(int8_t)lfsr(sample + i);
+
+		if (bc & 0x40)
+			aphase += 60000;
+		else
+			aphase += 90000;
+			
+		//FM
+		frq = sample * 1000;
+		
+		phase = (phase + frq);
+		sphase = phase + (256<<16);
+
+		re = (sine_table_f32[(sphase & 0x03FF0000)>>18]*127);
+		im = (sine_table_f32[(phase & 0x03FF0000)>>18]*127);
+		
+		buffer.p[i] = {(int8_t)re,(int8_t)im};
+	}
+	
+	bc++;
+}
+
+int main() {
+	EventDispatcher event_dispatcher { std::make_unique<AudioTXProcessor>() };
+	event_dispatcher.run();
+	return 0;
+}