7 #include <avr/interrupt.h>
8 #include <util/delay.h>
11 /* wake up on interrupt */
12 static void switch_idle(void)
15 set_sleep_mode(SLEEP_MODE_IDLE);
19 static void init_board(void)
23 /* enable interal reference for
25 * When the bandgap reference is connected to the Analog Comparator (by setting the ACBG bit in ACSR). */