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Date: Thu, 14 Dec 2006 13:35:16 +0100
From: "Niklaus Burren" <niklaus.burren@domain.hid>
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Subject: [Xenomai-help] Registering Interrupt Handler [Scanned]
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Hello

I try to register an interrupt handler for an externel interrupt(GPIO 
105) in a xenomai (2.2.2) kernel module on a ARM processor (PXA 270).
I create a interrupt object with the rt_intr_create() function without 
an error. After that I enable the interrupt with rt_intr_enable(). When 
I run the kernel module on the PXA270 board and put a square signal to 
the GPIO 105 pin the interrupt handler is never called.

// Interrupt Handler
int int_handler(struct xnintr *intr)
{
    printk("Interrupt detected\n");
    return RT_INTR_HANDLED;
}

----

// Enalbe Interrupt in init_module()
err = rt_intr_create(&intr_desc, "GPIO_INT", 10, &int_handler, NULL, NULL);

rt_intr_enable(&intr_desc);

On PXA270 all externel interrupts on GPIO's have the same interrupt 
number (10). Is that a problem? When I get the pin status from the pin 
level register GPLR3 I can detect the square signal at the pin. But the 
interrupt handler function int_handler() is never called.

Is there any other initialization that I had to do?

Kind Regards

Niklaus Burren