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Re: [avr-gcc-list] gcc-avr 4.9.2 -Os messes with interrupt vectors

From: avr
Subject: Re: [avr-gcc-list] gcc-avr 4.9.2 -Os messes with interrupt vectors
Date: Sun, 8 May 2016 16:29:23 +0100 (BST)

Thank you for your reply! I solved the issue thanks to Senthil, but FYI

PORTB |= (1 << PB5)

does *not* toggle the LED, it is OR, not XOR. It was actually a problem with some linker flags.

8. Mai 2016 15:53 von address@hidden:

On 05/08/16 06:22, address@hidden 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.

Tom Dean

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