Rockwell Automation 2711P Software Development Kit User Manual - Manual (Page 90)

Publication 2711P-UM005A-EN-P - March 2007
90 Device Drivers
//
// Attempt to use lower level DDK function to get
// information directly from the PCI controller.
//
/////////////////////////////////////////////////////
//
// Normally you would code a loop here that would be
// used to search the PCI Bus for the desired device,
// but for this example we are just going to assume
// we know the BUS, Slot and Function number.
//
//////////////////////////////////////////////////////
Sn.u.bits.DeviceNumber = DRV_DEVICE_NUM;
Sn.u.bits.FunctionNumber = DRV_FUNC_NUM;
// DDK call to query for PCI information
dwLength = HalGetBusDataByOffset(PCIConfiguration, DRV_BUS_NUM,
Sn.u.AsULONG,
&Pcc, 0,
sizeof(PCI_COMMON_CONFIG));
//
// check to see if the call was successful
//
if (sizeof(PCI_COMMON_CONFIG) == dwLength)
{
pDrvData->Dii.dwIrq = Pcc.u.type2.InterruptLine;
}
else
{
DEBUGMSG(ZONE_INIT,(_T("DRV_Init: HalGetBusDataByOffset()")
_T(" call failed!\r\n")));
}
#endif // defined(DRV_USE_PCI)
}
//
// If the SYSINTR has not been assigned yet, try and ask the HAL
// if it has or can assign a SYSINTR for you.
//
if (0 == pDrvData->Gii.SysIntr)
{
if (!REQUEST_SYSINTR(pDrvData->Dii.dwIrq,pDrvData->Gii.SysIntr))
{
pDrvData->Gii.SysIntr = DRV_SYSINTR;
}
}