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Understanding and Writing Device Tree Files

How you guys deal with the Device Tree file? Now I understand device tree syntax quite a bit I still don’t get how I can write my own

  1. undefined2001#0000

    for example mapping all the 16 gpio pins of a stm32 in my own `app.overlay`

  2. melta101#0000

    will look something like this

    / {
    gpio_1: gpio_1 {
    compatible = “gpio-keys”;
    gpios = ;
    label = ” GPIO no 1″;
    };
    };

  3. undefined2001#0000

    / {
    zephyr,user {
    pa0-gpios = <&gpioa 0 GPIO_ACTIVE_HIGH>;
    pa1-gpios = <&gpioa 1 GPIO_ACTIVE_HIGH>;
    };
    };

  4. undefined2001#0000

    I did it like this

  5. melta101#0000

    you will need to add a compatible

  6. undefined2001#0000

    it is working without that

  7. undefined2001#0000

    I don’t know how

  8. undefined2001#0000

    but to make this work i have to keep this convention `name-gpios`

  9. melta101#0000

    its basically superimposing on the existing GPIO

  10. undefined2001#0000

    think so

  11. undefined2001#0000

    I am trying now to read the device tree documentation of zephyr

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