We try to use an interrupt vector for PIO (B) input PB25 from a stream driver. But each time the signal comes high to PB25, our stream driver crashes and WinCE too. Our interrupt C function is never called.
PHYSICAL_ADDRESS physAdd;
physAdd.QuadPart = (UINT64) AT91C_BASE_PMC;
pPmc = (AT91PS_PMC)MmMapIoSpace(physAdd,sizeof(AT91S_PMC),FALSE);
physAdd.QuadPart = (UINT64) AT91C_BASE_PIOB;
pPioB = (AT91PS_PIO)MmMapIoSpace(physAdd,sizeof(AT91S_PIO),FALSE);
physAdd.QuadPart = (UINT64) AT91C_BASE_AIC;
pAic = (AT91PS_AIC)MmMapIoSpace(physAdd,sizeof(AT91S_AIC),FALSE);
// Enable in the power management controller
pPmc->PMC_PCER = (1<<AT91C_ID_PIOB);
// Disable interrupts and configure it
pAic->AIC_IDCR = (1<<AT91C_ID_PIOB);
pAic->AIC_SVR[AT91C_ID_PIOB] = (UINT)PinInterrupt;
pAic->AIC_SMR[AT91C_ID_PIOB] = AT91C_AIC_SRCTYPE_EXT_HIGH_LEVEL | AT91C_AIC_PRIOR_HIGHEST;
pAic->AIC_EOICR = 0;
pAic->AIC_ICCR = (1<<AT91C_ID_PIOB);
// Enable it
pPio->PIO_ODR = AT91C_PIO_PB25;
pPio->PIO_IER = AT91C_PIO_PB25;
pAic->AIC_IECR = (1<<AT91C_ID_PIOB);
void __cdecl PinInterrupt(void) {
PHYSICAL_ADDRESS physAdd;
physAdd.QuadPart = (UINT64)AT91C_BASE_PIOB;
volatile AT91PS_PIO pPio = (AT91PS_PIO)MmMapIoSpace(physAdd, sizeof(AT91S_PIO), FALSE);
physAdd.QuadPart = (UINT64) AT91C_BASE_AIC;
volatile AT91PS_AIC pAic = (AT91PS_AIC)MmMapIoSpace(physAdd, sizeof(AT91S_AIC), FALSE);
volatile DWORD pioISR = pPio->PIO_ISR,
pioPDSR = pPio->PIO_PDSR;
pAic->AIC_EOICR = 0;
MmUnmapIoSpace(pPio, sizeof(AT91S_PIO));
MmUnmapIoSpace(pAic, sizeof(AT91S_AIC));
}
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