Does anyone know how to access the SMBus controller on the PXIe-8370 MXI-Express x4 card?

[jeffrobins]

Does anyone know how to access the SMBus controller on the PXIe-8370 MXI-Express x4 card?  I want to use it to talk to some voltage monitering sensors on a board I am developing. 

[jonnycodesalot]

The PXI Express spec says that there has to be a dll that allows you to access this information.  Look at http://www.pxisa.org/Spec/PXIEXPRESSSWSPEC_R1DOT1.pdf , pages 29-31 to see a definition of the interface.  The document details how to find the DLL (it's in the registry), but it's something like C:\Program Files\National Instruments\PXI\Drivers\NIPXIeSMu.dll (SM is for System Module).

[jonnycodesalot]

Correction: I gave a link directly to a document, which of course broke when the document revs.  See the latest version of PXI-6 at http://www.pxisa.org/Specifications/Default.aspx.