Spartan-3E ACD/DAC Driver Labview FPGA

[Benjamin Cook]

Hello,

I am an academic user (student), and am trying to use the Spartan-3E to perform signal processing.  I cannot find any examples or code on how to interface Labview FPGA with the ADC and DAC on the Spartan-3E.  This seems like someone would have written something like this before.

Please advise,

Benjamin Cook

[mdevoe]

I would take a look at the getting started guide:

ftp://ftp.ni.com/evaluation/academic/getting_started_spartan.pdf

There should be some examples which deal with reading from the ADC and writing to the DAC under this directory:

<LabVIEW Dir>\examples\Spartan-3E\...

It looks like you have to talk SPI directly to the ADC and DAC, but there should be some VIs that get  you started.

[Eli_S]

Hi Ben,

I think you will find this link very helpful as well. I contains a lot of information and training material.

[chefweb]

How can I use the ADC and the DAC at the same time? First I give the DAC the needed data via SPI and after this I write the data to the pre-amp. But then the DAC stopps working while the DAC_CS bit is high. I have no idea what do to. Have anybody a working example for a simultaneously use of the DAC and ADC?

Many thanks in advance

[A_Patel]

Hi Chefweb,

I need to know a bit more information.

What hardware are you using?

How are you testing the ADC and DAC?

thanks

FlashP

[chefweb]

Hi,

I use the Sparten 3E Board together with Labview 8.6 FPGA. I figured out that the ADC isn't the problem, just the the Preamp!. The DAC never works when I configure the Preamp. Unfortunately is this necessary to use the ADC. I think it is an error in the Compiler .. is this possible?

Thanks

Chefweb

[Vincent_Claes]

Board specification page 70 :

Disable Other Devices on the SPI Bus to Avoid Contention
         The SPI bus signals are shared by other devices on the board. It is vital that other devices
         are disabled when the FPGA communicates with the DAC to avoid bus contention.

So this is a major problem with this board, you better design your own external PCB (FX2 connector) or use the other header with extra ADC, DAC I/O

datasheet of board: www.xilinx.com/support/documentation/boards_and_kits/ug230.pdf

Kind regards,

Vince

http://pwo.fpga.be

[chefweb]

"Disable Other Devices on the SPI Bus to Avoid Contention"  ..I'm doing this, but it isn't working. The ADC, DAC and PreAMP Vis are in their own case structure and each button is sperated in the host VI. Just the removal of the Preamp routine brings the DAC to running. I think its a problem with the compiler.  When someone want's to try it for your one, send me a message and I can send you the Labview program.

chefweb

[pollo]

Hi Everyone, I have been reading your answers about adc/dac driver for labview fpga but anyone

is quite clear for us. I am wondering if someone have better information.

Thanks

Miguel 

[chefweb81]

Hi all,

I really tryed a lot to get ADC, DAC and PreAMP  running together. Finially I desigend a PCB for the external FX Connector and this is running fine.