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Changing Python-1300C Parameters from the PL

Former Member

Hi,

 

I'm interested in using the Vision Kit with this camera and a microzed. I had a couple of questions about this camera.

 

The first thing is how fast can you change camera parameters (if at all) such as gain, shutter, ROI et.c.
Is it possible to do a frame by frame change at full framerate by taking low latency decisions in the FPGA?

 

The second question is what's the best performance one can get from this kit? Can it go up to the full 200+ frames/second with the Avnet daughter board?

Thanks in advance for the help.
 

  • 0

    Excellent questions !

    In the Avnet reference designs, we have implemented the following:

    - SPI transactions are performed by the Zynq's ARM processors (ie. software)

    - the reference design does not run at 200 frames/sec

    The above implementation details are not a hardware limitation, so you could achieve more performance by modifying the reference design.

    - the SPI controller is a custom controller (HDL code) which has a FIFO like interface, connecting a state machine to this interface would achieve much faster configuration that could take place during the blanking periods

    - we have the video data path running at a pixel rate of 27MHZ * 4 = 108MHz, instead of the maximum 72MHz * 4 = 288 MHz

       - note that the video data is received on 4 channels running at 108MHz/4 = 27MHz  each

       - in the Avnet design, the 4 channels are combined into a single data channel running at 108MHz

    NOTE that if you increase the video data path to the maximum data rate, you have two options:

    1) keep the four parallel data paths seperate, and concatenate the results together before saving to the external frame buffer
        this will keep the data rates low, and be possible to build a design in Artix fabric

    2) combining the four data paths to a single path of 72MHz * 4 = 288 MHz,
        you will have issues building the design in Artix fabric (Zynq, 7020, MicroZed Embedded Vision Kit),
        but should be OK in Kintex fabric (Zynq 7030, PicoZed Embedded Vision Kit).

    Hope this helps !

    Regards,

    Mario

  • 0 in reply to albertabeef

    Thanks Mario.

    I took a while to reply, as I didn't have the board in my hands until pretty much now. These are some useful starting points.

    So far I have run into some initial problems with getting the camera board to work, which has gone into a separate topic.
    I will update this when I start trying custom designs for the camera.

    Regards,
    Konstantinos