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List: uclinux-dev
Subject: [uClinux-dev] An Interrupt Question about ide?
From: "lmh" <mhli () ycigrnd ! mail>
Date: 2004-08-24 12:06:07
Message-ID: 001001c489d2$bd7f4ab0$1400a8c0 () zzb
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Hi All,
I have a question wana to ask for some advices.
There are two ext-intr sources in my board(arm940t cpu:s3c2500),one come from ide \
named intr-1, the other come from my mpeg4 encode chip(intime co ltd's ime6410) named \
intr-0. To my video encode chip,the interrput comes very frequently.Nearly every 40 \
ms comes about 20 succeeds interrputs,each inturrupt space 220 us and i need 200 us \
to deal it. At the same time, i need access my uclinux ide (by PIO model). I found \
when i start hd copy (like 'cp') or another action which will cause any very \
frequently ide interrupt's, my video intr will be "killed" -- don't answer interrupt \
.
I don't know what may cause it ? Could you give me some experiences to debug it?
Oh, Sorry ,To my cpu (s3c2500),i had set my video interrupts's level higher than \
ide's interrupt and they had the same access timming,and when i use each one \
alone,they both work ok with another soft-interrupt(like timer) and net interrupt.
Thank you sir!
Best Regards!
lmh
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<DIV><FONT size=2>Hi All,<BR> I have a question wana to ask for some
advices.<BR> There are two ext-intr sources in my board(arm940t
cpu:s3c2500),one come from ide named intr-1, the other come from my mpeg4 encode
chip(intime co ltd's ime6410) named intr-0. To my video encode chip,the
interrput comes very frequently.Nearly every 40 ms comes about 20 succeeds
interrputs,each inturrupt space 220 us and i need 200 us to deal it.
<BR> At the same time, i need access my uclinux ide (by PIO model).
I found when i start hd<BR>copy (like 'cp') or another action which will cause
any very frequently ide interrupt's, my <BR>video intr will be "killed" -- don't
answer interrupt .<BR> <BR> I don't know
what may cause it ? Could you give me some experiences to debug
it?<BR> <BR> Oh, Sorry ,To my cpu
(s3c2500),i had set my video interrupts's level higher than ide's interrupt and
they had the same access timming,and when i use each one alone,they both work ok
with another soft-interrupt(like timer) and net interrupt.</FONT></DIV>
<DIV> </DIV>
<DIV><FONT size=2> Thank you sir!</FONT></DIV>
<DIV> </DIV>
<DIV><FONT size=2> Best Regards!<BR>
lmh<BR></DIV></FONT></BODY></HTML>
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