arduino-atmega/include/board_common.h

STDIO_UART_BAUDRATE
1
(9600U)
LED0_ON
1
(PORTB |=  LED0_MASK)
LED0_OFF
1
(PORTB &= ~LED0_MASK)
LED0_TOGGLE
1
(PORTB ^=  LED0_MASK)
LED_PANIC
1
LED0_ON
CPU_ATMEGA_CLK_SCALE_INIT
1
CPU_ATMEGA_CLK_SCALE_DIV1
XTIMER_WIDTH
1
(16)
XTIMER_HZ
1
(250000UL)
XTIMER_BACKOFF
1
(40)
void board_init(void)

Initialize board specific hardware, including clock, LEDs and std-IO.