hi!
what if the timer interrupt (SIGNAL(SIG_OVERFLOW0)) happens while i call millis() and a byte (of volatile unsigned long timer0_overflow_count) overflows, that is already used in millis()'s computation?
e. g.
timer0_overflow_count=255
millis() call happens
least significant byte is read and multiplied with 2^14
SIG_OVERFLOW0 happens
now: timer0_overflow_count=256
now the second least significant byte is read and the result looks like timer0_overflow_count was (255+256)
is it a good idea to write a "safe_millis()",
that has a "cli()" in the beginning, and
that restores registers in the end?
bye
arne
