Re: [ECOS] CS8900a interrupt problem on EB40

Re: [ECOS] CS8900a interrupt problem on EB40

[Michael Anburaj]

Normal, You need to Acknowledge first the interrupt & then unmask it.

Before unmasking if there were pending interrupts, then even after unmasking 
-- the pending interrupt would interrupt (IRQ) until itÂ’s cleared.

I am not familiar with the AtmelÂ’s Interrupt controller. So, I may be right 
or wrong.


Cheers,
-Mike.


>From: RandyLin@mxic.com.tw
>To: ecos-discuss@sources.redhat.com
>Subject: [ECOS] CS8900a interrupt problem on EB40
>Date: Mon, 6 Oct 2003 17:50:08 +0800
>
>CS8900a is connected with IRQ1,ethernet cable is not connected.
>after cyg_drv_interrupt_unmask(),
>EB40 generate interrupt all the time, the AIC_IPR is 0x00070005(IRQ1 is
>pending)
>the IRQ bit is set, is it mean interrupt?
>but read cs8900a register CS8900A_ISQ, always 0, that should be no
>interrupt.
>I don't know why there  is always interrupt?
>thanks for any help!
>
>
>
>--
>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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[ECOS] CS8900a interrupt problem on EB40

[RandyLin]

CS8900a is connected with IRQ1,ethernet cable is not connected.
after cyg_drv_interrupt_unmask(),
EB40 generate interrupt all the time, the AIC_IPR is 0x00070005(IRQ1 is
pending)
the IRQ bit is set, is it mean interrupt?
but read cs8900a register CS8900A_ISQ, always 0, that should be no
interrupt.
I don't know why there  is always interrupt?
thanks for any help!



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