[Simulavr-devel] Problem with TCNT1H on at90s8535

[Detlef Vollmann]

Hello,

simulavrxx doesn't seem to count correctly timer1 on an at90s8535.

I use the following simple program timertest.c:

#include <inttypes.h>
#include <avr/io.h>
#include <avr/interrupt.h>

int
main(void)
{
    /* setup timer 1 */
    TCCR1A = 0;
    TCCR1B = _BV(CS10);

    /* enable Port D as output */
    DDRD = 0xff;

    /* loop forever, monitoring TCNT1H */
    while (1) PORTD = TCNT1H;

    return (0);
}

And I start simulavr:
simulavr -f timertest -d at90s8515 -W 0x32,q

Now, I get only zeros written into q :-(

(If I change 'PORTD = TCNT1H' to 'PORTD = TCNT1L' I see the count
going up in my output file 'q'.)

Is timer1 not supported?
(I used the latest CVS source from
cvs.savannah.nongnu.org:/sources/simulavr).

Thanks for any help,
  Detlef

BTW, the 'TIMER0, OVF' doesn't seem to work either...

-- 
Detlef Vollmann   vollmann engineering gmbh
Linux and C++ for Embedded Systems    http://www.vollmann.ch/
Linux for PXA270 Colibri module: http://www.vollmann.ch/en/colibri/