issue with the AdressSpace

[HeikoM]

Hello,

I write a PWM-Signal (low=0V, High=5V and Periode: <10ms) with a PCI6229 and the AO Example in the DDK-Drivers.

The PWM-Signal looks very good, but after approximately 15-20 seconds, I get always a runtime error: Page Fault.

Code:

for(;;){

        board->DAC_Direct_Data[channel].writeRegister(0.0);

        RtSleep(1);
       board->DAC_Direct_Data[channel].writeRegister(5.0);

        RtSleep(1);

} 

I found the failure In the tAdressSpace::write32 function (osibus.h): The void*-Pointer "theSpace" is no longer valid.

Have somebody an idea, what I do wrong?

 kind regards

Heiko Mayer 

[Tom_W_[DE]]

Hi Heiko-

Which OSinterface are you using (or did you write your own)?  Which host environment (PC, OS, etc) are you using?  Can you share your code built from the AO example, paring it down to only include configuration and register writes/reads as shown in the MHDDK if possible?

Thanks-

[HeikoM]

Hello Tom,

Thanks for your answer, but I found the solutions.

It had nothing to do with DDK.

Best regards

Heiko

[Tom_W_[DE]]

Hi Heiko-

Thanks for letting us know.  Can you please describe the cause of the failure just in case anyone else runs into the same problem?

Thanks in advance-

[HeikoM · Accepted solution]

Hello Tom,

My bug was a simple C/C++ error:

I have the "__stdcall" instruction for my timerfunction forgotten.

That was the cause for the "page fault".

Best regards

Heiko Mayer