OK i managed this myself,
i changed the above to
/*
- Serial interfaces
*/
// Serial (EDBG)
#define PIN_SERIAL_RX (30ul)
#define PIN_SERIAL_TX (20ul)
#define PAD_SERIAL_TX (UART_TX_PAD_0)
#define PAD_SERIAL_RX (SERCOM_RX_PAD_2)
and i am using the Serial object and its working now....
Have fun!