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LeopoldVonBuschLight

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  1. Like
    LeopoldVonBuschLight reacted to @lex in OV5640 on mainline kernel   
    Today I had a chance to test OV5640 on mainline kernel 4.17.2 and see the status of OV5640 and CSI drivers, thanks to FE work and the author of the driver (help name here...). I tested on NanoPi K1 Plus (H5) to verify the images in very low light conditions, so don't expect good quality.
    I could take some images using fswebcam and you should expect basic v4l2 functionality already works if not all. I think motion (did not test  / had time to test it) can work with current OV5640 on mainline kernel.
    Grabbing Image is very fast, currently, Image size I can get are 320x240 and 640x480 pixels, above this i get a dark image. I have not looked at the driver source code to see if it is implemented or not.  
     
    Basically, you need to add the sun6i_csi and ov5640 drivers to the kernel and adjust DT to have the endpoint. FE has already done it and left H5 for homework, but is the same as H3.
     
    To check the functionality, install v4l2-utils and when the driver sun6i_cs loads, it creates the device node /dev/video0 and you can check that:
     
    sudo v4l2-ctl -d /dev/video0 -D Driver Info (not using libv4l2):     Driver name   : sun6i-video     Card type     : sun6i-csi     Bus info      : platform:camera     Driver version: 4.17.2     Capabilities  : 0x84200001         Video Capture         Streaming         Extended Pix Format         Device Capabilities     Device Caps   : 0x04200001         Video Capture         Streaming         Extended Pix Format You should see the modules loaded like this:
    lsmod Module                  Size  Used by sun6i_csi              24576  0 videobuf2_dma_contig    20480  1 sun6i_csi videobuf2_memops       16384  1 videobuf2_dma_contig ov5640                 36864  1 videobuf2_v4l2         24576  1 sun6i_csi videobuf2_common       40960  2 videobuf2_v4l2,sun6i_csi v4l2_fwnode            20480  2 ov5640,sun6i_csi v4l2_common            16384  1 ov5640 videodev              196608  6 v4l2_fwnode,v4l2_common,ov5640,videobuf2_v4l2,sun6i_csi,videobuf2_common sunxi_cir              16384  0 media                  36864  3 videodev,ov5640,sun6i_csi rc_core                40960  2 sunxi_cir sch_fq_codel           20480  6 8189es               1118208  0 So time to revisit the camera drivers on mainline.
    Here are some images (remember, low light condition!):
     
    *update: All possible window sizes are working for streaming!
     
     
     


  2. Like
    LeopoldVonBuschLight got a reaction from @lex in BPi R16   
    I'm not sure about the specs for the battery, I just used a 4400mAh lipo I found on ebay or aliexpress a while back. I didn't configure anything on the m2m for this specific battery, so it might blow up eventually...
     
    I bought some 6 pin 1.25mm JST connectors that were mentioned here: http://forum.banana-pi.org/t/battery-cable-circuit/3737 (even though this is for a different board). 
     
    This is from the m2magic schematic located here: https://bananapi.gitbooks.io/banana-pi-bpi-m2-magic-iot-development-board/content/chapter1/bpi-m2-magic-schematic-diagram.html

     
     
     
    Here are the pins on the board:

     
    The battery I'm using at the moment only has two wires (no temp sensor). I put pins 1-3 to bat +, pins 4 and 5 to bat - and a 10k resistor between pin 6 and gnd. It looks like that was wrong though, and pin 6 should go straight to gnd with no resistor?
     
    Here is one of the 6 pin 1.25mm JST connectors:

     
    Sorry for the bad pictures! 
  3. Like
    LeopoldVonBuschLight got a reaction from @lex in BPi R16   
    Oh and here is a connector that should work: https://www.ebay.com/i/162705482126?chn=ps&dispItem=1
     
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