-SERIALPORT *serial_open ( const char *device );
-void serial_close ( SERIALPORT *port );
-int serial_getchar ( SERIALPORT *port );
-int serial_putchar ( SERIALPORT *port, unsigned char ch );
-void serial_flush ( SERIALPORT *port );
+SERIALPORT *fg_serial_open ( const char *device );
+void fg_serial_close ( SERIALPORT *port );
+int fg_serial_getchar ( SERIALPORT *port );
+int fg_serial_putchar ( SERIALPORT *port, unsigned char ch );
+void fg_serial_flush ( SERIALPORT *port );