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Thread: Teensy 3.2 DIY board bringup - USB not working

  1. #1

    Teensy 3.2 DIY board bringup - USB not working

    Hi all,
    I've made my first custom Teensy based on schematics and a MKL02 from PJRC. I made 3 copies of the board and nothing happens by default as explained here https://forum.pjrc.com/threads/27497-MINI54-Bringup

    When I sample the RESET pin on the MKL02, I can see the heartbeat (17.39Khz). When I press the Program button, the RESET signal goes high and the clock on the MK20 starts up and shows a solid 16Mhz clock. So far - all good, but the board does not show up on my computer?

    I wanted to use a USB Type C connector, so I'm guessing that I've made a mistake on how to connect it but I can't seem to figure out what I've done wrong? If anyone could take a look at the schematic to help me solve the problem, I'd really appreciate it! It's likely something obvious, but I just can't see it.

    https://flashgamer.com/a/teensy/TeensyTest.pdf

  2. #2
    Turns out I had managed to swap D+/D- :-/
    Now working well after some bodge wires to swap them.

    Click image for larger version. 

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  3. #3
    That looks really good. How many layers to your board?

  4. #4
    @Loren42 It's just two layers. No need for any more

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