lcd/hd44780: adjust bus timings based on official datasheet
lcd/hd44780: make bus cycles atomic
lcd/hd44780: fix scope error due to ATOMIC_BLOCK insertion
lcd/hd44780: revert atomic changes
rtc/ds1302: implement 3-wire protocol via bitbang
button/button: remove testing reminder
time/timer0: rename hooks called by timer0 isr
rtc/rtc: add rough common rtc interface
io/io: define io's for ds1302 bitbang
obd/stn1110: implement timeouts, state struct
src: enforce convention of underscore prefix for private functions
std: include <time.h> from latest avr-libc
main: remove noreturn for standards compliance (makes no difference)