[ECOS] which priority will suit rtc clock?

[Qiang Huang]

I meant the Real Time clock will also generate a clock tick interrupt,
right?
for example :

(lowest priority number, highest  priority)

ext_IRQ2 with higher priority than ext_IRQ1
ext_IRQ1: priority: 5
ext_IRQ2: priority: 3
Real Time Clock Tick Interrupt: priority: ??

When ext_IRQ1 happened and being processed, at the same time ext_IRQ2
happens, will it process the ext_IRQ2 or  while processing ext_IRQ1 all
interrupt are masked so not able to response to ext_IRQ2?? if ext_IRQ2 would
be processed because of its higher priority than ext_IRQ2 then which
priority should be used for real time clock tick interrupt(assume RTC
priority can be adjusted)? Or am I wrong for all of this?

Thank you very much.

-----Original Message-----
From: Gary Thomas [mailto:gthomas@ecoscentric.com]
Sent: 16 October 2002 15:43
To: Qiang Huang
Cc: eCos Discussion
Subject: Re: [ECOS] which priority will suit rtc clock?


On Wed, 2002-10-16 at 08:39, Qiang Huang wrote:
> Thank you.
> If irq is being processed, should the rtc interrupt still work? If so does
> that mean the rtc interrupt priority should be the lowest  compare to
other
> irq.

I have no idea what you are trying to ask here.

> Thanks a lot.
>
> -----Original Message-----
> From: Gary Thomas [mailto:gthomas@ecoscentric.com]
> Sent: 15 October 2002 14:09
> To: Qiang Huang
> Cc: eCos Discussion
> Subject: Re: [ECOS] If delay() function is called in an isr() with
> interruptdisabled...
>
>
> On Tue, 2002-10-15 at 05:25, Qiang Huang wrote:
> > Hi all:
> >      I wonder which priority should the RTC be? If the delay() function
> > depends on the system RTC so if it is called in an isr() (which with
> > interrupt disabled) anything wrong?
>
> You can't call any function which depends on interrupts (or even higher
> level scheduling) from an ISR.
>
> > Thanks a lot
> > qiang
> >
> >
> >
> > --
> > Before posting, please read the FAQ: http://sources.redhat.com/fom/ecos
> > and search the list archive: http://sources.redhat.com/ml/ecos-discuss
>
> --
> ------------------------------------------------------------
> Gary Thomas                  |
> eCosCentric, Ltd.            |
> +1 (970) 229-1963            |  eCos & RedBoot experts
> gthomas@ecoscentric.com      |
> http://www.ecoscentric.com/  |
> ------------------------------------------------------------
>
>
>
>
> --
> Before posting, please read the FAQ: http://sources.redhat.com/fom/ecos
> and search the list archive: http://sources.redhat.com/ml/ecos-discuss
--
------------------------------------------------------------
Gary Thomas                  |
eCosCentric, Ltd.            |
+1 (970) 229-1963            |  eCos & RedBoot experts
gthomas@ecoscentric.com      |
http://www.ecoscentric.com/  |
------------------------------------------------------------




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