Getting sysinterupt value ?

chronos · **Joined:** Mon Nov 26, 2007 2:11 pm **Posts:** 5

In the header file at91sam9263_oal_intr.h we cab read this:

Code:

/ the following values are used to compute the LOGINTR associated with a PIO pin.
// For example LOGINTR for PIOA pin 4 is LOGINTR_BASE_PIOA + 4
#define LOGINTR_BASE_PIOA         64
#define LOGINTR_BASE_PIOB         96                           
#define LOGINTR_BASE_PIOC         128
#define LOGINTR_BASE_PIOD         160
#define LOGINTR_BASE_PIOE         192                          

//////////////////////////////////////////////////////////////////////
//                          
// SYSINTR values
//
#define SYSINTR_SYS             (SYSINTR_FIRMWARE+0)
#define SYSINTR_ETHER         (SYSINTR_FIRMWARE+1)

My question is, touse my pio setted interupt with InterruptInitialize, the sysinterupt valur is
LOGINTR_BASE_PIOC+5 (for user button one in sam9263-ek)
or morelikely
SYSINTR_FIRMWARE+LOGINTR_BASE_PIOC+5 ?

Thanks

Adeneo · **Posted:** Mon Dec 03, 2007 10:02 am

Hi,

If you want to use a PIO, you must use a sysinterrupt value like LOGINTR_BASE_PIOC+5.

Best Regards

chronos · **Joined:** Mon Nov 26, 2007 2:11 pm **Posts:** 5

Ok, now I assume i get the correct sysint value.
My question now is the following.
Is the wince 6.0 bianry bsp is configure to handle PIO interrupts ?
I set up the PIOC like this.

Code:

   PHYSICAL_ADDRESS PhysAddr = {0}; 
   AT91PS_PIO g_pPIO = NULL;
   AT91PS_PMC pPmc = NULL;
   AT91PS_AIC pAic = NULL;

// Get the virtual address of the PMC
   PhysAddr.LowPart = (DWORD) AT91C_BASE_PMC;
   PhysAddr.HighPart = 0;
   pPmc = (AT91PS_PMC) MmMapIoSpace(PhysAddr,sizeof(AT91PS_PMC),FALSE);

// Get the virtual address of the PIOC
   PhysAddr.LowPart = (DWORD) AT91C_BASE_PIOC;
   PhysAddr.HighPart = 0;
   g_pPIO = (AT91PS_PIO) MmMapIoSpace(PhysAddr,sizeof(AT91PS_PIO),FALSE);

// Get the virtual address of the AIC
   PhysAddr.LowPart = (DWORD) AT91C_BASE_AIC;
   PhysAddr.HighPart = 0;
   pAic = (AT91PS_AIC) MmMapIoSpace(PhysAddr,sizeof(AT91PS_AIC),FALSE);
   
   /* Enable the periph clock for the PIO controller */
   /* This is mandatory when PIO are configured as input */
   pPmc->PMC_PCER = (1 << AT91C_ID_PIOCDE);

   /* Set the PIO line in input */
   g_pPIO->PIO_ODR = AT91C_PIO_PC5;

   /* Set the PIO controller in PIO mode instead of peripheral mode */
   g_pPIO->PIO_PER = AT91C_PIO_PC5;

   /* Disable the interrupt on the interrupt controller */
   pAic->AIC_IDCR = (1 << AT91C_ID_PIOCDE);

   /* Store the Source Mode Register */
   pAic->AIC_SMR[AT91C_ID_PIOCDE] = AT91C_AIC_SRCTYPE_INT_HIGH_LEVEL | AT91C_AIC_PRIOR_LOWEST;

   /* Clear the interrupt on the interrupt controller */
   pAic->AIC_ICCR = (1 << AT91C_ID_PIOCDE);

   /* Enable button interrupts generation through the PIO controller */
   g_pPIO->PIO_IER = AT91C_ID_PIOCDE;

   /* Enable PIO interrupt in the interrupt controller */
   pAic->AIC_IECR = (1 << AT91C_ID_PIOCDE);

   MmUnmapIoSpace(pPmc,sizeof(AT91PS_PMC));
   MmUnmapIoSpace(g_pPIO,sizeof(AT91S_PIO));
   MmUnmapIoSpace(pAic,sizeof(AT91PS_AIC));   

Assuming that the sysint is the the good one (it's set as 128+5), I should handle some interupts in my IST when the buton is pressed. But nothing happens. Dis I miss somethnig in my PIO configuration ?

Adeneo · **Posted:** Tue Dec 04, 2007 12:18 pm

First, there is a mistake for MmmapIOSpace declarations. sizeof(AT91PS_PMC) must be sizeof(AT91S_PMC) to have the size of the structure and not the size of the pointer.

Many initialization is made by the interruption management. You just have to change PIO_PER and PIO_ODR registers to enable interrupt on a PIO.

An example for BP2 (PC4):

PHYSICAL_ADDRESS PhysicalBase;
DWORD dwInBuf,dwSysIntr;
AT91PS_PIO pAdressPIOC;
HANDLE hLEDIST,hLEDEvent ;

dwInBuf=(LOGINTR_BASE_PIOC+4);
PhysicalBase.QuadPart = (LONGLONG)AT91C_BASE_PIOC;
pAdressPIOC = (AT91PS_PIO)MmMapIoSpace(PhysicalBase, sizeof(AT91S_PIO), FALSE);

pAdressPIOC->PIO_PER = AT91C_PIO_PC4;
pAdressPIOC->PIO_ODR = AT91C_PIO_PC4;

KernelIoControl( IOCTL_HAL_REQUEST_SYSINTR,
(LPVOID)&dwInBuf,
sizeof(dwInBuf),
&dwSysIntr,
sizeof(dwSysIntr)
,NULL)
)

hLEDIST = CreateThread( NULL, // Security
0, // No Stack Size
LEDIST, // Interrupt Thread
NULL, // Init stucture give by parameters
CREATE_SUSPENDED, // Create Suspended
NULL // Thread Id
);

hLEDEvent = CreateEvent(NULL, FALSE, FALSE, NULL);

InterruptInitialize(dwSysIntr,
hLEDEvent,
NULL,
0))

The IST LEDIST just make waitforsingleobject on the hLEDEvent.

Best regards.

chronos · **Joined:** Mon Nov 26, 2007 2:11 pm **Posts:** 5

That's it, many thanks.

Getting sysinterupt value ?

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