Completely useless "about" screen

Paved road for talking Xylos RX and logger
Added test button for Xylos TX
Fixed jammer crashing after loading second time

firmware/baseband-tx/proc_playaudio.hpp

@@ -0,0 +1,56 @@
+/*
+ * 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_PLAYAUDIO_H__
+#define __PROC_PLAYAUDIO_H__
+
+#include "baseband_processor.hpp"
+
+class PlayAudioProcessor : public BasebandProcessor {
+public:
+	void execute(buffer_c8_t buffer) override;
+	void fill_buffer(int8_t * inptr);
+
+private:
+	int8_t audio_fifo[4096];		// Probably too much (=85ms @ 48000Hz)
+	uint16_t fifo_put, fifo_get;
+	uint8_t as = 0, ai;
+	int8_t re, im;
+	
+	int16_t st;
+	
+	int16_t audio_data[64];
+	
+	bool asked = false;
+
+	const buffer_s16_t preview_audio_buffer {
+		audio_data,
+		sizeof(int16_t)*64
+	};
+	
+	FIFOSignalMessage sigmessage;
+	
+	uint32_t aphase, phase, sphase;
+	int32_t sample, frq;
+};
+
+#endif