From: Andrew Lunn <andrew@lunn.ch>
To: Fabian Scheler <fabian.scheler@gmail.com>
Cc: Oliver Munz <oli@snr.ch>, ecos-discuss@sources.redhat.com
Subject: Re: [ECOS] Timecritical interrupt-debuging ... printf in DSR's ... Cyg_Scheduler_Implementation::rem_thread() ... cyg_assert_fail()
Date: Tue, 05 Jul 2005 07:28:00 -0000 [thread overview]
Message-ID: <20050705072746.GC30398@lunn.ch> (raw)
In-Reply-To: <69dd805e05070500163304862@mail.gmail.com>
On Tue, Jul 05, 2005 at 09:16:44AM +0200, Fabian Scheler wrote:
> Hi,
>
> > I don't know if it's allowed to use the buffered IO from ISR and DSR's. If
> > everybody know's if it should work or not in threory, let me know.... Im
> > also intressted in other hints how to debug driveres...
>
> well, I don't know the exact implementation of buffered IO in eCos,
> but buffered IO always is blocking (if you want to ensure that no data
> gets lost), and blokcing operations are never allowed within an ISR or
> a DSR.
Correct.
You can use the infrastructure trace functions and instramentation
functions which are safe when writting to a buffer. Or you can
implement your own buffering which is ISR/DSR safe.
Andrew
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next prev parent reply other threads:[~2005-07-05 7:28 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-07-04 21:46 Oliver Munz
2005-07-05 7:17 ` Fabian Scheler
2005-07-05 7:28 ` Andrew Lunn [this message]
2005-07-05 9:43 ` oliver munz @ s p e a g
2005-07-05 11:23 ` Andrew Lunn
2005-07-06 7:31 ` Frank Pagliughi
2005-07-08 11:08 ` oliver munz @ s p e a g
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