Re: [ECOS] CS8900a interrupt problem on EB40

["Michael Anburaj" <embeddedeng at hotmail dot com>]

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 it?s cleared.

I am not familiar with the Atmel?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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