Extract LogFile, add (dumb) logging to ERT, AIS apps.

firmware/application/log_file.hpp

@@ -0,0 +1,42 @@
+/*
+ * Copyright (C) 2015 Jared Boone, ShareBrained Technology, Inc.
+ *
+ * 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 __LOG_FILE_H__
+#define __LOG_FILE_H__
+
+#include <string>
+
+#include "ff.h"
+
+class LogFile {
+public:
+	~LogFile();
+
+	bool open_for_append(const std::string file_path);
+	bool close();
+	bool is_ready();
+	bool write(const std::string message);
+
+private:
+	FIL f;
+};
+
+#endif/*__LOG_FILE_H__*/