how to config the interrupt

[luwt]

How can i assign a exclusive interrupt for pxi communicate card developed myself? the NI8187 controller assign interrupt 9 for all the device, include system device, and i can not change it.

[Alan_L]

luwt,

It sounds like you may not have the latest version of the PXI-8187 BIOS. Please click here to download version 1.3.1.

Once installed, there should be an additional option in the BIOS configuration to configure PXI slots for a particular IRQ. Thanks, and please let me know if you continue to have trouble.


Best Regards,
Alan L
Applications Engineer
National Instruments

[luwt]

Hi,

I have updated my BIOS. The PXI manu apperaed. in it, there are INTP,INTS,INTA,INTB...INTH... etc. But what them mean? And how to config it? For example, if i want to assign int 11 for my card exclusively, what can i do?

thanks a lot

[Alan_L]

luwt,

Unfortunately, the answer to your question is quite complex. Modern computer systems highly abstract the concept of IRQs (there are several layers involved) and shared resources are the norm. In fact, IRQ 9 is the defacto standard for current operating systems (e.g. Windows XP) since they handle arbitration between devices. When it comes right down to it you'll need to go through a process of trial and error in an attempt to isolate an IRQ for your board. You probably noticed that there are choices for INTA, INTB, INTC, and INTD on the left side of the BIOS menu -- each are mapped to slots in the chassis as well as internal devices such as the video and network adapters.

In almost all cases there is not really a reason to reserve an IRQ for a single piece of hardware. What exactly are you trying to do? I might be of more assistance if I knew more about the larger picture.


Thank you!!

Best Regards,
Alan L
Applications Engineer
National Instruments