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Date: Thu, 04 Feb 2010 17:16:21 +0100
From: Stefan Kisdaroczi <kisda@domain.hid>
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Subject: Re: [Xenomai-help] User interrupt handling in Xenomai running into
 probs
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To: xenomai@xenomai.org, sarans1987@domain.hid

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Hi,

Am 04.02.2010 16:51, schrieb Saravanan S:
> Hi,
>=20
>     I tried to implement the hardware interrupt handling feature of
> xenomai in user space.I read the native-api document and ran the
> user_irq.c program with one change ,i tried to intercept the eth0
> interrupt on my system(using interrupt number from cat
> /proc/interrupts).When i ran the program the system froze!!!!!

The rt_intr_* interface is disabled by default in the kernel configuratio=
n, please check.
That would mean that rt_intr_wait returns immediately, now look at this l=
oop from user_irq.c:
    for (;;) {

       /* Wait for the next interrupt on channel #7. */
       err =3D rt_intr_wait(&intr_desc,TM_INFINITE);

       if (!err) {
           /* Process interrupt. */
       }

> What am i doing wrong??
>=20
> What  is the purpose of this feature of allowing user space handling of=

> interrupts.Can a user space driver be written using this???

You should use the rtdm interface for drivers.

Regards Stefan


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