Strange bug on EP9302-based custom board

Joel Sherrill <> joel.sherrill at
Fri Dec 16 13:21:25 UTC 2005

Ian Caddy wrote:
> Jay Monkman wrote:
> <snip>
>> That's a real waste of CPU time. You'll end up spending a significant 
>> amount of
>> time in interrupt processing.
>> 10ms is the default tick rate for RTEMS, and a pretty standard tick 
>> rate for
>> other OSes. Until recently, that was the rate for Linux on x86.
> We use a 1ms tick since our systems (Power Utilities) SCADA like 1ms 
> resolution on all digital inputs and a lot of our timeouts are based on 
> small millsecond times.  This is on a 90MHz Coldfire processor with no 
> dramas.

Most if not all of the systems I know that OAR has consulted on use 
either a 1 millisecond or 500 microsecond tick.  FOr the 500 microsecond 
tick, the CPU has to be pretty fast and the application had to have good 

> regards,
> Ian Caddy

Joel Sherrill, Ph.D.             Director of Research & Development
joel at                 On-Line Applications Research
Ask me about RTEMS: a free RTOS  Huntsville AL 35805
    Support Available             (256) 722-9985

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