added copy of hackrf usb stack

firmware/baseband/sd_over_usb/proc_sd_over_usb.cpp

@@ -0,0 +1,49 @@
+/*
+ * Copyright (C) 2015 Jared Boone, ShareBrained Technology, Inc.
+ * Copyright (C) 2023 Bernd Herzog
+ *
+ * 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 "ch.h"
+#include "hal.h"
+
+#include "proc_sd_over_usb.hpp"
+
+#include "debug.hpp"
+#include "portapack_shared_memory.hpp"
+#include "event_m4.hpp"
+
+extern "C" {
+void start_usb(void);
+void stop_usb(void);
+void irq_usb(void);
+
+CH_IRQ_HANDLER(Vector60) {
+	irq_usb();
+}
+}
+
+int main() {
+	EventDispatcher event_dispatcher { std::make_unique<USBProcessor>() };
+	HALT_UNTIL_DEBUGGING();
+	start_usb();
+	event_dispatcher.run();
+	stop_usb();
+	return 0;
+}