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OMAP 3530 ISP bypass mode

paul sarazin
Prodigy 140 points

OMAP 3530

Is there anyway we could capture the frame pre-ISP so that we could verify what effect the ISP performs on a captured frame?

http://www.em.avnet.com/ctf_shared/sta/df2df2usa/AvnetVSS_-TI%20Embedded-Processor-Applications-Public.pdf

There is supposed to be a way for the ISP to bypass the video back-end and write raw sensor data to memory.  If you set the output format to Raw Bayer via the appropriate ioctl, the driver is supposed to configure the ISP this way.  Has anybody got this working? 

  • 0
    TI__Expert 8180 points

    I believe, when you (and above pdf) says bypass mode. it actually means dump captured data directly to memory from CCDC without any processing. It is possible to do this, infact in PSP release we are supporting exactly same thing.

    The incoming BT656 streams gets captured directly into memory via CCDC without any processing. Please refer to OMAP3 ISP source code (<kernel>/drivers/media/video/isp/) into PSP release.

     

    Thanks,

    Vaibhav

  • 0
    TI__Intellectual 1665 points

    Paul,

    You can interface sensor data to memory directly, to achieve this you would need to configure the CCDC & ISP registers based on your sensor characteristics.

    We have had several implementations. For example we have interfaced Aptina mt9t111for RAW or YUV422 sensor data with Beagleboard-xM. Please refer to the driver on beagleboardXM-camwork tree for additional driver and structure details.

    Regards, Punya