[ECOS] How to handle IRQ0 interrupt?

[Neeraja <neeraja dot kothala at gmail dot com>]

Hi,
    I am working on at91rm9200 board. I want to catch the interrupt when the
button is pressed which is connected to IRQ0 line.
  But what is happening is that when I run the application the interrupt isr
is being called always irrespective of the button press. 
 
Can anyone suggest me how to configure so that the interrupt comes only when
the button is pressed ?

Here is the part of the code I am using 

interrupt = CYGNUM_HAL_INTERRUPT_IRQ0;
cyg_interrupt_create(interrupt,
                             0,                     // Priority - what goes
here?
                             (cyg_addrword_t)0,     //  Data item passed to
interrupt handler
                             (cyg_ISR_t *)IRQ0_isr,
                             (cyg_DSR_t *)IRQ0_dsr,
                             &interrupt_handle,
                             &interrupt_object);

cyg_interrupt_attach(interrupt_handle);
cyg_interrupt_acknowledge(interrupt);
cyg_interrupt_unmask(interrupt);  

Thanks,
Neeraja.

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