From: Andrew Lunn <andrew@lunn.ch>
To: Robert Brusa <bob.brusa@gmail.com>
Cc: MailingList: ecos-discuss <ecos-discuss@ecos.sourceware.org>;
Subject: Re: [ECOS] priority of main thread
Date: Thu, 20 Nov 2008 16:03:00 -0000 [thread overview]
Message-ID: <20081120153804.GD17925@lunn.ch> (raw)
In-Reply-To: <op.ukxbn8ajkeg3uf@localhost>
On Thu, Nov 20, 2008 at 04:22:58PM +0100, Robert Brusa wrote:
> Hi,
> in my system, I have a cyg_user_start() as well as a main() function. The
> first includes calls to initialize various modules. main() contains an
> eternal loop and is assumed to work as a normal thread. The problem is
> that main produces a hanger when I call cyg_spi_transfer to read my
> onboard-RTC. When using this RTC-module in a test program with a single
> thread it works. It also works (in main) when I change the transfer-mode
> to polling. This let me think that there is some kind of priority
> problem.
I would not necessarily agree with this. If it is a priority problem,
it suggests one of the threads running with higher priority than main
is spinning, so stopping main from running. This is normally a
bug. However this does not really fit with PIO working.
This actually sounds like an interrupt problem. I would put a
breakpoint on the interrupt handler and see if it gets called.
Andrew
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prev parent reply other threads:[~2008-11-20 15:39 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-11-20 15:34 Robert Brusa
2008-11-20 16:02 ` Gary Thomas
2008-11-20 16:06 ` Robert Brusa
2008-11-20 18:42 ` Gary Thomas
2008-11-21 18:07 ` Jonathan Larmour
2008-11-24 11:06 ` Robert Brusa
2008-11-24 11:53 ` Robert Brusa
2008-11-24 12:57 ` Jonathan Larmour
2008-11-20 16:03 ` Andrew Lunn [this message]
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