/* USART pinmux initialization function. 
Set each required pin to USART functionality  */
void TARGET_IO_PORT_init()
/* USART pinmux initialization function. 
Set each required pin to USART functionality  */
void TARGET_IO_PORT_init()
{
	gpio_set_pin_function(PB10, PINMUX_PB10D_SERCOM4_PAD2);
	gpio_set_pin_function(PB11, PINMUX_PB11D_SERCOM4_PAD3);
}