[avr-gcc-list] Strange delay behavior

[Per-Tore Aasestrand]

Hello list,

I've suddenly run into something odd. I am using AVR Studio Version 
4.12 Service Pack 4 with WinAVR 20060421. Have been using this setup 
for a while without any problems.

Now, running the following test program on a ATmega128 @ 8 MHz, 
produces pulses on PC3. However, with 'off' period of 1,45 ms and 
'on' period of 2,45 ms and. I had of course expected 1ms and 2 ms, 
respectively.

I ran the same program using CodeVision, and then the periods were OK.

Guess I've overlooked something.
Any idea, someone?

Regards,

Per-Tore

#define F_CPU 8000000UL

#include <avr/io.h>
#include <util/delay.h>

int main(void)
{
        // Initialize I/O Ports
        DDRC  = 0x08;                   // PC3: output

        for(;;)
        {
                PORTC = 0x00;
                _delay_ms(1);
                PORTC = 0x08;
                _delay_ms(2);
        }
}


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