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Zynqberry csi Camera distortion due to encryption delay

Started by stvo, April 17, 2017, 10:27:52 PM

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stvo

Hello,

in my Project i have to implement Camera stream encryption.

In the current design contains a 128 bit Key/block modul.

the delay is  between 12 and 21 tacts  , depend on AES Implementation, and this delay causes a distortion.

My question is, what i have to consider or change in the zynqberry demo 1 To compensate the delay?

Regards
Stefan

Oleksandr Kiyenko

Hello,

At which part of video datastream are you insert your encription core ?
As first step you can try to add FIFOs before and after your core it can help.

Best regards
Oleksandr Kiyenko

stvo

Hello Oleksandr,

my core is between video_resize and the VDMA.
I verify the data order with the ILA, this seeems not the problem. I  control the data stream by the signals s_tready, m_tvalid and pass the signals  s_tuser , t_last.
in the attachments is a image how the destortion look like.


Best Regardes ,
Stefan