This is the mail archive of the ecos-discuss@sources.redhat.com mailing list for the eCos project.


Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]
Other format: [Raw text]

Re: Re: DSR question


yes this is what is happening, the DSR unmasks the 
interrupt causing the the ISR to retrigger before the 
DSR is completed.  So this can cause a deadlock issue?  
I thought this should just retrigger the DSR again? 
> On Mon, 2002-09-30 at 20:28, t.michals@attbi.com wrote:
> > Basicly the interrupt is level triggered.
> 
> I never use level triggered interrupts in my HW design. They have a bad
> habit of triggering again as soon as you unmask them if the level isn't
> cleared by HW before unmasking. Perhaps check that, it could cause a
> deadlock of stacked DSR-s.
> 
> iz
> 
> 

-- 
Before posting, please read the FAQ: http://sources.redhat.com/fom/ecos
and search the list archive: http://sources.redhat.com/ml/ecos-discuss


Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]