Hi,
I need help with establishing a PIOA interrupt. My initialization code is as follows:

/* Enable clock (for interrupt functionality) */
AT91C_BASE_PMC->PMC_PCER |= (0x1 << AT91C_ID_PIOA);

/* Configure PEN_IRQ* PIO configuration. Set as an input. */
AT91C_BASE_PIOA->PIO_PPUER |= PENIRQ_PIOA_CFG;
AT91C_BASE_PIOA->PIO_IFER |= PENIRQ_PIOA_CFG;
AT91C_BASE_PIOA->PIO_ODR |= PENIRQ_PIOA_CFG;
AT91C_BASE_PIOA->PIO_PER |= PENIRQ_PIOA_CFG;

/* Clear and disable any interrupts for PIOA */
AT91C_BASE_PIOA->PIO_ISR;
AT91C_BASE_PIOA->PIO_IDR = 0xFFFFFFFF;

/* Configure PIOA IRQ in AIC */
AT91C_BASE_AIC->AIC_SMR[AT91C_ID_PIOA] = PENIRQ_IRQ_PRIO;
AT91C_BASE_AIC->AIC_SVR[AT91C_ID_PIOA] = (unsigned int)PENIRQ_Handler;

/* Configure PIOA IRQ */
AT91C_BASE_PIOA->PIO_IER = PENIRQ_PIOA_CFG;

/* Enable PIOA Irq in AIC */
AT91C_BASE_AIC->AIC_ICCR = (1 << AT91C_ID_PIOA);
AT91C_BASE_AIC->AIC_IECR = (1 << AT91C_ID_PIOA);

It's important to note that even though I've wired PENIRQ* to IRQ1, I'm not using the AIC IRQ1 but rather the status change interrupt of PIOA (so I can keep track of PENIRQ* states easier). So then, later in code, to "test" if the interrupt is working properly, I call:

AT91C_BASE_AIC->AIC_ISCR = 1 << AT91C_ID_PIOA;

I can tell it's not working because I have written into PENIRQ_Handler to change the display (very drastically). The behavior is, the initial image is displayed, and then nothing happens.

Can anyone please tell me what I'm not doing correctly? I'm guessing there's something I'm not initializing correctly.

Hello,I want to drive 2LEDs connected to PB[5:4] opreate all on and all off repeatly,but I don't know how to config those related registers.Could you tell me ?
1 is on and 0 is off.Please write to armboy@sohu.com.
Thank you for your attention.