VoCore: SPI or not?

The three days I am working on SPI. It is a little hard to route, but I added SPI interface to the pins finally.

vocore.spi

 

The upper shows the SPI pins export map. The advantage of this version is all GPIOs(it is real, all 28 GPIOs have exported), and SPI interface is exported too.

The disadvantage is GPIO14, GPIO15 are too near each other, if you solder a connector to GPIO15, it might cover some of GPIO14.

I have tried many ways to make the two GPIOs to be together peacefully, but looks like there is no prefect solution.

If you have any good idea about this, please leave a comment. 🙂

13 thoughts on “VoCore: SPI or not?”

  1. tarjeik

    Is it not possible/too late to change the board size? Extending it a mm or two in each direction should fix the problem 🙂

        1. vonger Post author

          Current 5.2×2.0 antenna I am using is about 2.5dbi, 3.2×1.6 is about 0.5dbi. Wifi is the most important part of the board, I must try to maximised it.
          And that clear-zone also can be used for even bigger antenna, such as ACA-5036-A2-CC-S(3dbi)

    1. vonger Post author

      No problem, but for it is not confirmed yet. this sch is for beta version.

  4. nevtag

    Many thanks to add SPI interface to the pins.
    So I can make a Dock with CAN-Bus Interface.
    Best regards,
    Joc

    1. vonger Post author

      That is a little hard for now due to the release time is near, next dock version might add.

  5. dan

    Maybe you should consider moving the GND pin to somewhere inside the VoCore and not near the edges. After you move the GND pin (maybe move it further up) you can move all the bottom edge pins one place to the right which would increase the distance between GPIO14 and GPIO15

    1. vonger Post author

      Ye, that can be done 🙂 Just try to find a good position.

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