How to setup the interrupt on falling edge of the PIO pin.
When we setup an interrupt using the function "KernelIoControl", is it possible to specify that we want the interrupt on either the falling/rising edge or at level detect.

I came to know that we can configure the interrupt either on edge or level both positive and negative by configuring the AIC register AIC_SMR[i] in OALIntrInit()

But it can only be configured for the whole port.
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I wolud like to know how to configure the FIQ , IRQ0 and IRQ1.
I tried configuring the FIQ.
I am able to get the PIO interrupt from the corresponding pin PD4.
But i was not able to configure the FIQ for the same pin.
I configured PD4 as PIO_PERIPH_A
I used
Pin_IRQ =0;
KernelIoControl(IOCTL_HAL_REQUEST_SYSINTR, &Pin_IRQ, sizeof(Pin_IRQ), &Pin_IRQ_Intr, sizeof(Pin_IRQ_Intr),0);

Is it correct?
Any help regarding this matter is highly awaited.

Thanks,
som

hello,

Just a clarification using a I/O pin as interrupt source, how I can configure it as level or edge interrupt source:

I have this code

static const struct pio_desc hw_pio[] = {
{"SCIRQ", AT91C_PIN_PD(4), 0, PIO_PULLUP, PIO_INPUT},
};

//set the PD4 as input for interrupt
pio_setup(hw_pio, (sizeof(hw_pio)/sizeof(struct pio_desc)));

// Request SysIntr for IRQ PD4
dwLogIntr = (LOGINTR_BASE_PIOD + 4);
SetLastError(ERROR_SUCCESS);

if (!KernelIoControl(IOCTL_HAL_REQUEST_SYSINTR, &dwLogIntr, sizeof(DWORD), &Sysintr, sizeof(DWORD), &dwBytesReturned))
{
RETAILMSG(1, (TEXT("ERROR: Failed to request the sysintr, errorcode = %d \r\n"),GetLastError()));
Sysintr = SYSINTR_UNDEFINED;
return (FALSE);
}

That's enough to set the pin as level interrupt?
thanks!

Hello bob and somappu,

If you implement the code of bob, PD4 is used as a standard GPIO interrupt source, not as a FIQ !

FIQ is a special interrupt source which is not natively managed by WinCE. To enable it, you need to set PD4 as a PERIPH_A pin and set the AIC to handling FIQ. OEMInterruptHandlerFIQ() routine (located in %_TARGETPLATROOT%\SRC\OAL\OALLIB\fiq.c) is called when FIQ is triggered, but, in this function, consider you are OSless !!!

IRQ0 or IRQ1 can be used as WinCE standard interrupt sources. You need to set the IRQx pin as PERIPH_B, request a SysIntr, change the SRCTYPE of the corresponding AIC_SMR[] to the desired type of trigger.

HTH