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Configuring FIQ at ARM7 LPC2468

Philip Philipov

Hi,

I could not write a code works for FIQ

My code is here:

void InitFIQ(){
  VICIntEnClr   = 1<<EINT0_INT
  VICIntSelect  = 1<<EINT0_INT;
}

In startup file:

Vectors
.
.
                LDR     PC, [PC, #-0x0120]     ; Vector from VicVectAddr
                LDR     PC, FIQ_Addr

.
.
.

        PRESERVE8
        EXTERN  PIXCLK_Handler
FIQ_Addr        DCD     PIXCLK_Handler
.
.
IRQ_Handler     B       IRQ_Handler
FIQ_Handler     B       PIXCLK_Handler

And the handler:

void PIXCLK_Handler(void) __irq // EINT0 FIQ
{
        volatile u16 h;
        EXTINT = EINT0; // clear interrupt
        // TO DO !!
//VICVectAddr = 0       // Acknowledge Interrupt
// no acknowledge in FIQ
}


when i use __fiq, it doesn't compile.

Where is my mistake?

Best regards

0