spi

[clint100]

I know it maybe over kill but I have a NI-7853 board connected to an A/D chip.  The user inputs an analog voltage and the corresponding bits are read over a SPI interface on the 7853.  I'm just checking that the conversion is correct.  I know the BIT weight.  Most of the tutorials refer to LABVIEW FPGA as the host interface.  I don't have a FPGA.  Just an A/D chip.  Any pointers or places to start?  I know very little ( nothing ) about SPI.  Trying to associate this LABVIEW FPGA ref to my needs.

Thanks

[crossrulz]

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@clint100 wrote:

I know it maybe over kill but I have a NI-7853 board connected to an A/D chip.  The user inputs an analog voltage and the corresponding bits are read over a SPI interface on the 7853.  I'm just checking that the conversion is correct.  I know the BIT weight.  Most of the tutorials refer to LABVIEW FPGA as the host interface.  I don't have a FPGA.  Just an A/D chip.  Any pointers or places to start?  I know very little ( nothing ) about SPI.  Trying to associate this LABVIEW FPGA ref to my needs.

Thanks

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The FPGA is on the NI-7853R board.  You program it with LabVIEW FPGA.  There is a SPI Driver API availabable for free.  Or you could look into just buying a USB-8451 bus interface module instead of trying to figure out the FPGA.

[clint100]

Thanks.  I saw the USB-8451 in the discussion grps.  The customer already bought the FPGA Module.  Thats why I said I thought it was over kill.  So if I understand right I use the FPGA on the 7853 to talk to the A/D chip ( AD 7985).  Is there a SPI Driver API for LV2009??  I remember National saying something came w the FPGA Module.