From: Andrew Lunn <andrew@lunn.ch>
To: Nick Garnett <nickg@ecoscentric.com>
Cc: jporthouse@toptech.com, ecos-discuss@sources.redhat.com
Subject: Re: [ECOS] Re: DSR stops running after heavy interrupts. Spurious Interrupt!
Date: Mon, 10 Apr 2006 17:44:00 -0000 [thread overview]
Message-ID: <20060410174334.GA8017@lunn.ch> (raw)
In-Reply-To: <m33bgl8i0v.fsf@xl5.calivar.com>
> > What should I look for in attempting to eliminate spurious interrupts? Can
> > they be eliminated?
>
> The CYGNUM_HAL_INTERRUPT_NONE return from hal_IRQ_handler() only
> happens when an interrupt occurs but the interrupt controller denies
> all knowledge of it. One possibility is that hal_IRQ_handler() is
> decoding a real interrupt wrongly and generating -1 by mistake.
>
> What you need to do is find out why hal_IRQ_handler() is returning
> this value. If you can put a breakpoint in hal_IRQ_handler()
> where CYGNUM_HAL_INTERRUPT_NONE is returned, then you should be able
> to look at all the relevant device and interrupt controller registers
> and find out what is going on.
Also check that you have level vs edge trigger correct for your
hardware.
It could be a hardware error, eg a pulse is too short, a floating
interrupt signal, some device which does not get reset when the
process does etc.
Andrew
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next prev parent reply other threads:[~2006-04-10 17:44 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-04-05 21:09 [ECOS] DSR stops running after heavy interrupts Joe Porthouse
2006-04-06 6:49 ` Andrew Lunn
2006-04-06 9:02 ` Stefan Sommerfeld
2006-04-06 21:09 ` Joe Porthouse
2006-04-06 21:19 ` Andrew Lunn
2006-04-08 4:18 ` [ECOS] DSR stops running after heavy interrupts. Bug found? Joe Porthouse
2006-04-09 12:33 ` Andrew Lunn
2006-04-10 4:50 ` [ECOS] " Sergei Organov
2006-04-10 9:36 ` Nick Garnett
2006-04-10 10:44 ` Sergei Organov
2006-04-10 10:59 ` Nick Garnett
2006-04-10 11:15 ` Sergei Organov
2006-04-10 13:20 ` Joe Porthouse
2006-04-10 16:41 ` [ECOS] Re: DSR stops running after heavy interrupts. Spurious Interrupt! Joe Porthouse
2006-04-10 17:20 ` Nick Garnett
2006-04-10 17:44 ` Andrew Lunn [this message]
2006-04-10 20:49 ` Joe Porthouse
2006-04-11 4:07 ` Sergei Organov
2006-04-11 8:31 ` Nick Garnett
2006-04-11 4:15 ` Sergei Organov
2006-04-11 8:43 ` Nick Garnett
2006-04-13 7:58 ` [ECOS] How to use the ARM directive DCB in Vectors.S Birahim Larou Fall
2006-04-13 13:28 ` Andrew Lunn
2006-04-13 13:32 ` Birahim Larou Fall
2006-04-21 7:40 ` [ECOS] " Daniel Néri
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