Frame divided. Basler camera with FPGA

Hi there!
I am using a Basler acA2000 340kc camera controlled through a PCIe-1473R FPGA.
After some trouble, I finally modified it and changed the TAP configuration by using this post.
http://digital.ni.com/public.nsf/allkb/EA1727D8D620B81F8625797B0072257C
With just the modification in the FPGA, the camera works and takes succesful images, nevertheless the frame appears divided into four images (all identical but for light intensity).
When I modify also the host code, then just one image appears in the frame, but definitely not a good image, as previously.
Anyone knows why can be this problem happening?
Thanks for your help.

I think that I figured out what is going on. I believe that the knowledgebase article that you were reading is incorrect. Let's troubleshoot the problem together and I will correct the article if necessary.
Let's talk for a little bit about what is going on. The two taps are 10 bits each, but they are stored in 16 bit data type. The two pixels need to be transfered from the FGPA to the host with a DMA FIFO. For convenience, the code uses only one DMA FIFO even though there are two taps. The article suggests that you should combine the 2 16-bit numbers into 1 32 bit number and then send it into the DMA FIFO. There are a few problems with this: first, the DMA FIFO has been configured for 16 bits, so half of the data is being deleted. Also, the code on the host is splitting the 16 bit data into 8 bits, which is not correct.
I think that it would be better to change the DMA FIFO to support 32 bit data. You can do this by opening the LabVIEW project and right-clicking on the Host DMA 16, select Properties, and then change the data type to U32. After that, you need to program the code on the host to split the number. You would then get two arrays (one for each tap). I think that it will reconstruct the image correctly if you just interleave these two arrays.
I attached some images. Try it out and tell me if it works. If so, I will update the documentation.
Jeremy P.

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Luc Desruelle | Voir mon profil | LabVIEW Code & blog
Co-auteur livre LabVIEW : Programmation et applications
CLA : Certified LabVIEW Architect / Certifié Architecte LabVIEW
CLD : Certified LabVIEW Developer / Certifié Développeur LabVIEW

L.D.MESU73 wrote:
Does anyone have code to receive Ethernet trames with FPGA decoder? (like the code on DevZone which includes code for reading and writing RS-232 data.) I would like to build a fast Ethernet sniffer and data decoder Any FPGA code or idea would be appreciated.
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* Back in about 1988, Robert J Schmalstieg (formally with DEC, acquired by Compaq and now with HP Network Support) wrote in VAX-Macro an application that ran on a VAX and would do what an LAN-Analyzer would do. He really wanted this functionality since there were only about (3) LAN-Analyzers available for the East Coast (Networks were so new that analyzers were very pricey!) So he found a hook into the driver for the network adapter that would put the adapter in promiscuous mode. Promiscuous mode would bypass the address and protocol checks normally performed by the hardware to toss or re-direct recieved frames.
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"Kasper B. Dall" wrote in message news:<[email protected]>...
> "I can't seem to find any drivers or utilities for the Redlake camera
> i'm using in my project.
>
> Only this: http://www.imagemill-tech.com/Redlake/ Fr_Redlake.htm
>
>
> But there's no info on how to get that VI (I've e-mailed them, of
> course).
>
>
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[email protected]
> http://www.geocities.com/irene_he/IVision.html

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Attachments:
VISAERROR.JPG ‏115 KB

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Frame divided. Basler camera with FPGA

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