Re: gcc-avr 4.9.2 -Os messes with interrupt vectors

"Thomas D. Dean" <[email protected]> Sun, 8 May 2016 06:53:38 -0700
Newsgroups gmane.comp.hardware.avr.gcc
Message-ID <[email protected]> 
On 05/08/16 06:22, [email protected] wrote:

Looks like you are toggling the LED too fast to see it.

Try adding a delay in the while loop

while (1) {
   PORTB |= (1 << PB5);
   delay_ms(500); /* or something */
}

Look at the avr-libc documentation.
http://nongnu.org/avr-libc/user-manual/

Tom Dean