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