Program reset

Altera_Forum · ‎12-29-2004

Hello!

I have the following problem. I created simple project by Quartus|| 4.1. And write primitive program in Nios || IDE:

int main()
{
 int i=0;
 while(1)
 {
   if (i==0) 
      IOWR_ALTERA_AVALON_PIO_DATA ( PIODIOD_BASE, 1);    
   else  if (i==10000) 
      IOWR_ALTERA_AVALON_PIO_DATA ( PIODIOD_BASE, 0);    
   i++;
   if (i==20000) i=0;    
 } 
 return 0;
}

Then I compiled all project and create *.sof file.

Then I download this *.sof file to real deivece and I saw the next picture: my program works during 13 s, then 13 s of reset and again. I didn't do the program reset.

How can I resolve this problem?

Thank you.

Altera_Forum · ‎12-29-2004

Hi,

What do you exactly mean with 'reset' ?

How many pulses do you see on the led? (1 a few or many?)

How do you detect this?

Is it restarting automatically or do you have to download again?

Stefaan

Altera_Forum · ‎12-30-2004

I don't think it's your code doing this because I see nothing wrong with it. You don't happen to have a watchdog in your system by any chance do you (then this would actually make sense).

Altera_Forum · ‎01-05-2005

Check to see in Quartus if your cpu reset pin is connected preperly and that it has the correct pin assignement. Maybe you haven't put a pin asignement on the reset pin so the P&R has assigned the reset pin to a random pin that happens to toggle periodically.