"CW generator" and "Whistle" merged in "Signal generator"

Added wave shape selection and tone frequency auto-update
Converted color icons to B&W

firmware/baseband/proc_siggen.hpp

@@ -0,0 +1,52 @@
+/*
+ * Copyright (C) 2014 Jared Boone, ShareBrained Technology, Inc.
+ * Copyright (C) 2017 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_SIGGEN_H__
+#define __PROC_SIGGEN_H__
+
+#include "baseband_processor.hpp"
+#include "baseband_thread.hpp"
+#include "portapack_shared_memory.hpp"
+
+class SigGenProcessor : public BasebandProcessor {
+public:
+	void execute(const buffer_c8_t& buffer) override;
+	
+	void on_message(const Message* const msg) override;
+
+private:
+	bool configured { false };
+	
+	BasebandThread baseband_thread { 1536000, this, NORMALPRIO + 20, baseband::Direction::Transmit };
+	
+	uint32_t tone_delta { 0 }, fm_delta { };
+	uint32_t lfsr { }, feedback { }, tone_shape { };
+    uint32_t sample_count { 0 };
+    bool auto_off { };
+	uint32_t tone_phase { 0 }, phase { 0 }, delta { 0 }, sphase { 0 };
+	int8_t sample { 0 };
+	int8_t re { 0 }, im { 0 };
+	
+	TXDoneMessage message { };
+};
+
+#endif