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Using the .net dll in Labview for PMBUS Group Command Protocol

Nicolae Preda
Prodigy 10 points

I am using TI USB Interface Adapter EVM to control some slave devices in Labview with the "USB Adapter Driver.dll".

Finally I have found how to use few commands, but still have problems with the Group Command Protocol method.

Even it seems to be easy to use, I got all the time "InvalidResponse".

Based on documentation "SLLU093–August 2006 page 47" there should be a USB packet byte 4 called D (with "0" hex value if not the last packet or "FF" hex for the last packet). This byte is not available in the "groupcommand" method  and I am not sure how to use it.

I have tried to use the command like in the following picture but ...I have got the same error.

I have tried different combinations but without any results.

Any hint please?

Thank you,

Nicolae