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Using Leopard 3M HD Camera Board with DM6446 EVM

Roman Sedyshev
Intellectual 495 points

Hello.

I plugged 3M HD Camera Board (Leopard Img.) to my DM6446 EVM (Spectrum Digital). When I start a 'prev_720p_example' (examples downloaded from leopard site) on target it shows an error message:

> cannot disable fb/1

This error comes from InitDisplayDevice() function. I have no any displays connected to DM6446 board, but it does not matter I think. On target "/dev/fb" contain '0', '1', '2', '3' files. Why this example cannot disable 'fb/1'  device (also, fb/3 device)? I tried to comment disabling all 'fb's  in source code but it do not work without this disabling.

Thank you.

  • 0
    Intellectual 495 points

    Leoard support advised me to set following bootargs:

    setenv bootargs 'console=ttyS0,115200n8 noinitrd rw ip=dhcp
    root=/dev/nfs nfsroot=192.168.0.10:/home/work/filesys_dm6446,nolock
    mem=120M v4l2_video_capture=:device=MT9T001
    video=davincifb:vid0=720x480x16,2500K:vid1=720x480x16,2500K:osd0=720x480x16,2025K
    davinci_enc_mngr.ch0_output=COMPOSITE davinci_enc_mngr.ch0_mode=ntsc'

    it helps)