Updated funconfig with doxygen comments and header guard stuff.

inc/funconfig.h

@@ -1,11 +1,29 @@
+ /**
+ * @brief CH32VFUN configuration header. 
+ * @details This file is a ch32fun configuration file. 
+ * @author Jake G
+ * @date TODAYS_YEAR 
+ * @copyright None
+ * @file funconfig.h
+ */
+
+//Standard C header guard.
 #ifndef _FUNCONFIG_H
 #define _FUNCONFIG_H
 
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
 #define CH32V003 1
 #define FUNCONF_USE_DEBUGPRINTF 0
 #define FUNCONF_USE_UARTPRINTF  1
 #define FUNCONF_UART_PRINTF_BAUD 115200
 
 
+#ifdef __cplusplus
+}
+#endif // __cplusplus
 
-#endif
+#endif //_FUNCONFIG_H