From: Andrew Lunn <andrew@lunn.ch>
To: Sicheri Marco <m.sicheri@ctsgroup.it>
Cc: "eCos Dev.List" <ecos-devel@sources.redhat.com>
Subject: Re: Two timer in FIQ mode
Date: Fri, 19 Nov 2004 12:35:00 -0000 [thread overview]
Message-ID: <20041119123534.GN2180@lunn.ch> (raw)
In-Reply-To: <002d01c4ce24$a1634ac0$110110ac@Msicheri>
On Fri, Nov 19, 2004 at 11:43:39AM +0100, Sicheri Marco wrote:
> I all,
> I Have the Samsung s3c44b0x.
> I'd like use two timer in interrupt mode.
> So that i use the TIMER2 and the TIMER3 (use the cyg_interrupt_create()).
>
> First step: run only the timer2 in fiq mode every 1ms. It works ok
> Second step: run only the timer3 in fiq mode every 2ms. It works ok
> Now: run timer2 in FIQ mode and the timer3 in IRQ mode. They work ok.
> But: if i run timer2 in FIQ mode and the timer3 in FIQ mode, they don't
> work, and the system is lock.
FIQ is not heavily used so i would not be supprised if there were a
few bugs remaining. Probably its a reentrance problem, ie handling a
second FIQ will still handling the first. Take a look at vectors.S and
see if you can find such a problem.
Andrew
next prev parent reply other threads:[~2004-11-19 12:35 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-11-19 10:40 Sicheri Marco
2004-11-19 12:35 ` Andrew Lunn [this message]
2004-11-19 13:40 ` Mark Salter
2004-11-19 13:59 ` Nick Garnett
2004-11-22 11:03 ` Sicheri Marco
2004-11-19 14:04 ` Sicheri Marco
2004-11-19 14:12 ` Sicheri Marco
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