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AD7745 used via LabVIEW on a Win7 PC

Hey guys,

I am new to this forum and hope you can answer my questions about using an AD7745 ADC in a LabVIEW environment.

We used this chip for a while now under WinXP, but since the support for this OS will terminate soon our university requires that we move to a newer version of Windows. We migrated our LabView framework to a 64bit Win7 Enterprise which did work out fine.

Now we have the problem that the dll library for the AD7745 for the new OS is different from the one used for XP. Therefore our implementation does not work - most likely because LabView tries to send the wrong commands to the board. I did write to the support if they could provide us with an interface to access the library and see how the basic functions work in order to implement them in LabView (which we did before for the XP as well), but they 'refused' to help so far.

Does anyone have experience with this kind of problem? Or even better, has anybody done this and could send me a copy of their LabView VI?

Kind Regards,

Faja

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  • Hello Faja,

    Find following a description of the requirements for the I2C interface:

    Handle:- Passed by connect.vi

    ucRequest:- 0xDD; Defines I2C 8-bit pointer protocol

    usValue:- 0x90; I2C address of AD7745

    usIndex:- 0xXX; Register address

    ucDirection:- 0 or 1; 0 = PC to EZUSB, 1 = EZUSB to PC

    usBuffer_Length:-1 to 64; Number of bytes to transfer, max = 64

    ucBuffer:- Array of data to transfer

    I hope this helps.

    Regards,

    Sean

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  • Hello Faja,

    Find following a description of the requirements for the I2C interface:

    Handle:- Passed by connect.vi

    ucRequest:- 0xDD; Defines I2C 8-bit pointer protocol

    usValue:- 0x90; I2C address of AD7745

    usIndex:- 0xXX; Register address

    ucDirection:- 0 or 1; 0 = PC to EZUSB, 1 = EZUSB to PC

    usBuffer_Length:-1 to 64; Number of bytes to transfer, max = 64

    ucBuffer:- Array of data to transfer

    I hope this helps.

    Regards,

    Sean

Children
  • Hello, please could you provide full LabView project of the ad7745 evaluation board demo - capacitance/lnegth demo measurement? We would like to play a bit with it (to have bigger graph screens, add other functions..)  Both for evaluation purposes of the IC and also for using the evaluation board in teaching at the university as a demonstration of capacitance measurements.... Thank you