Configuration of interrupts

richg · Apr 1st 2010

Hi

I'm trying to use the interrupt feature of the device but I don't appear to be able to initialise the interface using the code below
I get an error 87 from the call to DeviceIoControl. Could you please tell me where I'm going wrong Thanks

Code

DWORD vl_IRQ = 7;
DWORD vl_SysIntr;
HANDLE vl_Event = CreateEvent(NULL, FALSE, FALSE, NULL);
HANDLE vl_IOPort = CreateFile( _T("DIO1:"), GENERIC_WRITE | GENERIC_READ, 0, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL );
// Configure the interrupt
if(DeviceIoControl(vl_IOPort, IOCTL_DIO_REQUEST_SYSINTR, &vl_IRQ, sizeof(DWORD), &vl_SysIntr, sizeof(DWORD), NULL, NULL ) )
{
if(InterruptInitialize(vl_SysIntr, vl_Event, NULL, 0 ))
{
InterruptDone(vl_SysIntr);
}
}

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fs-support_ZU · Apr 6th 2010

Hello,

- can you tell me how the registry is configured?
- what happens if you ignore this error?

richg · Apr 6th 2010

I haven't attampted to continue to configure the IRQ due to the error being reported. Do you believe the error is incorrect and could be ignored?

The registry settings are

[HKEY_LOCAL_MACHINE\Drivers\BuiltIn\DIGITALIO]
"FriendlyName"="Digital I/O driver for NetDCU"
"Port"=dword:00000001
"Ioctl"=dword:00000004
"Index"=dword:00000001
"Order"=dword:00000097
"Dll"="DIGIO.dll"
"Prefix"="DIO"
"UseAsIo"=dword:0000ffff
"DataDir"=dword:00000015

fs-support_ZU · Apr 6th 2010

Hello,

-for use IO Bit 7 as IRQ you should configure registry a following:

Code

reg open \Drivers\BuiltIn\DigitalIO
reg set value UseAsIO DWORD 0x00000080
reg set value DataDir DWORD 0x00000000
reg set value DataInit DWORD 0x00000000
reg set value IRQCfg0 DWORD 0x00000000
reg set value IRQCfg1 DWORD 0x00000080
reg set value IRQCfg2 DWORD 0x00000000
reg save

Quote

Do you believe the error is incorrect and could be ignored?

Yes, maybe it comes from an other module. Did you call SetLastError() before?

Here you will find a sample: http://www.forum.fs-net.de/viewtopic.php?f=4&t=631.

richg · Apr 7th 2010

Quote from "fs-support_ZU"

-for use IO Bit 7 as IRQ you should configure registry a following:

Code

reg open \Drivers\BuiltIn\DigitalIO

reg set value UseAsIO DWORD 0x00000080

reg set value DataDir DWORD 0x00000000

reg set value DataInit DWORD 0x00000000

reg set value IRQCfg0 DWORD 0x00000000

reg set value IRQCfg1 DWORD 0x00000080

reg set value IRQCfg2 DWORD 0x00000000

reg save

Looking at the documentation it indicates that the IRQCfg settings are for the NetDCU6 I'm using a 5.2 Module it this correct for a 5.2?

Quote

Did you call SetLastError() before?

No I haven't tried resetting the error state I will give this a go

fs-support_ZU · Apr 7th 2010

Hello

Quote

Looking at the documentation it indicates that the IRQCfg settings are for the NetDCU6 I'm using a 5.2 Module it this correct for a 5.2?

Ok, that is right IRQ feature is not implementet in the 5.2 driver right now. You may use externel IRQ (J5.1) for your purpose (see code below). Else - do you need the IRQ feature for a new design? Is it possible to switch to NetDCU9? NetDCU9 offers in general more modern features as 5.2!

C

// dio_test.cpp : Defines the entry point for the application.
//
// Windows Header Files:
#include <windows.h>
extern "C" BOOL InterruptInitialize(DWORD idInt, HANDLE hEvent, LPVOID pvData, DWORD cbData);
extern "C" VOID InterruptDone( DWORD idInt );
#define SYSINTR_FIRMWARE (8+8)
#define SYSINTR_PIFIRQ (SYSINTR_FIRMWARE+15)
#define SYSINTR_EXTIO (SYSINTR_FIRMWARE+16)
static HANDLE hIsrEvent = NULL;
int WINAPI WinMain( HINSTANCE hInstance,
HINSTANCE hPrevInstance,
LPTSTR lpCmdLine,
int nCmdShow
{
// craete event which will be fired when interrupt occurs
hIsrEvent = CreateEvent( NULL, FALSE, FALSE, _T("DIOINTF") );
if( NULL == hIsrEvent )
{
DWORD dwLastError = GetLastError();
ERRORMSG(1,(_T("Can't craete event (%d)\r\n"), dwLastError));
}
else
{
if (!InterruptInitialize(SYSINTR_EXTIO,
hIsrEvent,
NULL,
0 ))
{
CloseHandle( hIsrEvent );
hIsrEvent = NULL;
DEBUGMSG(1,
(TEXT("Error initializing interrupt, InitInterrupt() failed\n\r")));
return (FALSE);
} /* end-if */
InterruptDone( SYSINTR_EXTIO );
while( TRUE )
{
// wait for interrupt (event)
WaitForSingleObject( hIsrEvent, INFINITE );
RETAILMSG(1,(_T("Event triggered\r\n")));
// acknowledge interrupt
InterruptDone( SYSINTR_EXTIO );
}
}
return 0;
}

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richg · Apr 8th 2010

Quote

Ok, that is right IRQ feature is not implementet in the 5.2 driver right now. You may use externel IRQ (J5.1) for your purpose (see code below). Else - do you need the IRQ feature for a new design? Is it possible to switch to NetDCU9? NetDCU9 offers in general more modern features as 5.2!

That would explain the error then.
Unfortunately I can't change hardware as I'm working with preinstalled hardware I will have to give the external IRQ a go.

Thanks for your help.

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