Raspberry Pi history, versions, pins and headers as a Java Maven library

The best way to understand and learn something new, is to document it yourself. That’s what I’m doing in every step for my book-in-progress. And to fully get the pinnings and headers of the different Pi-boards, I decided to gather all info into a Java library with different enums to be able to auto-generate some content for the book and use in a few different example applications.

Maven repository

A first version is now available on Maven , but will definitely be further extended as I’m working on the content of the book.

Source code

The sources are available on GitHub . For example the list of available pin types:

public enum PinType {
    POWER("Power", 0x990000),
    GROUND("Ground", 0x000000),
    DIGITAL("Digital", 0x009900),
    DIGITAL_AND_PWM("Digital and PWM", 0xff7ff00),
    DIGITAL_NO_PULL_DOWN("Digital without pulldown", 0x800080);

    ...
}

Example application: JavaFX visualization

As an example in the book this library is used to automatically generate this JavaFX view of a Pi header:

Auto-generated README

Some code in the sources (UpdateReadme.java) automatically generates a new readme file with all the info from the enums.

Pi models

Pi major versions

Pi board versions

Pin types

Pin functions

Header types

8pin header

26pin header

40pin header