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  1. #1
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    Embedded Linux on a PCB

    Hello all,

    I am a student, i am trying to do something like the Olimex Maxi board. My board currently does not boot, i think it has something to do with the PSWITCH pin. If anyone knows what i am talking about that be great. But i am here to gather feedback on my schematic and board layout, thanx all.

    they are on my google drive, a .sch and .brd file

    IMX233 reference manual, if anyone is curious :https://www.nxp.com/docs/en/referenc...al/IMX23RM.pdf

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  2. #2
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    Re: Embedded Linux on a PCB

    You did not specify in which CAD your board was made, but even if you said it, it would not be sure that everyone have the program, so you will surely have a best chance to get replied if you show here the images in browser viewable formats, such as GIF, PNG, etc ...
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  3. #3
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    Re: Embedded Linux on a PCB

    Hello, sorry, This is drawn in EAGLE.

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    Re: Embedded Linux on a PCB

    Hello, sorry, I don`t have EAGLE.
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    Re: Embedded Linux on a PCB

    Adding an image, a png file of my board

    Click image for larger version. 

Name:	RevB.png 
Views:	8 
Size:	300.2 KB 
ID:	151095

    [Found at: drive. google. com /open ?id =1xj3Y4Ttd CBcqQv5tRQd5S i16MxRFQnqy ]
    Last edited by BradtheRad; 12th February 2019 at 04:18. Reason: Added image as Edaboard attachment

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  6. #6
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    Re: Embedded Linux on a PCB

    Some details may be problematic, such as the proximity of tracks on the component side, near of the pins of the connectors, which are not centralized between pins, but aligned to only one of the pins; I particularly prefer route on the bottom side, as this way I can remove any excess welds on the track. I would bet you have used the auto-route feature, which do not work well when design rules are not properly configured.

    Another thing that caught attention was the reset button pointed to the inner side of the board, which increases the chance of when being pressed, bumping your finger into any component, ripping it off, or injecting static electricity into the board.

    Also notable is the lack of mounting holes for fixing the board, or space in the laterals for fastening it in guides.

    In addition, the crystal is too far away from the microcontroller, which increase the chance of issues related to EMI.

    The J-TAG connector is placed too far from the microcontroller.

    Seriously speaking, I would recommend review this layout before manufacturing the PCB.
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