Nios II Timer

Hi rppolicy.

Here are my thoughts...

When you call the alarm_start function, the first call to alarm_callback will go occur in nticks. After the alarm_callback function gets called, the return value of the alarm_callback funtion becomes nticks.

If you started with a sample timer, the alarm_callback function will look something like this:

alt_u32 my_alarm_callback (void* context)
{
   /* 
   * This return value is used to determine when the call back function will 
   * be called again...  In this case, once every second
   */
  return alt_ticks_per_second();  
}

where the return value (100) is the number of ticks until 1 second expires, which then calls your alarm_callback funtion again (once every second).

I believe that if you return 1, you will get an interrupt in "one tick" which should be your 10 ms.

Hopefully this helps.

tjd