Re: [ECOS] interrupt handling -- basic problem?

[Gary Thomas <gary at mlbassoc dot com>]

On Tue, 2003-08-26 at 04:33, Piotr Trojanek wrote:
> Hi!
> 
> I want to do very simple task in ecos: attach ISR to UART, so it would
> be called on DCD signal transition. My problem is that it doesn't work.
> I'm sure there should be interrupts -- I have checked them in similar
> way on QNX.
> 
> In fact, I can't get my ISR working on any interrupt -- it's i386,
> ecos library build by 'ecosconfig new pc default', only changed to
> boot from GRUB (I use etherboot with multiboot image support).
> I have serial cable on COM1 (so I see output with minicom) and two
> wires attached to COM2 to generate IRQ.
> 
> I was trying to attach my ISR to IRQ4 (which is COM1, the same, which
> generate interrupts while transmitting data to my minicom), but can't
> get it working too.
> 
> So I have tried to check with HAL_INTERRUPT_IN_USE, which return 1 for
> all my IRQ! Docs says, that I can't attach ISR to if there is already
> one defined. So how to do this? Should I remove serial package?, but
> how then redirect my printf's on VGA console?
> 

How did you structure your application?  Remember that eCos does not
enable interrupts until you start "main()" (if you have one) or call
the scheduler directly.

Have a look at the kernel interrupt tests to see what's required.

-- 
Gary Thomas <gary@mlbassoc.com>
MLB Associates


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