Add support for BeagleBone AI with Adafruit BBIO.GPIO

[jomoengineer]

The new BeagleBone AI has a AM57x processor and a different gpio mapping than the previous BeagleBone boards, thus the BBIO GPIO Python libs do not work properly on the BB AI.

Ex:
On the BB AI P9_15 is mapped to gpio76
where
On the BB Black, P8_39 is mapped to gpio76

Also, although not really a Adafruit issue, the config-pin tool does not work with the BB AI:

$ config-pin -q P9_15
P9_15 pinmux file not found!
Pin has no cape: P9_15

[pdp7]

@jomoengineer thanks for opening this issue. Yes, I need to work on adding support for the BBAI. @jadonk and @MarkAYoder have been working on support in https://github.com/jadonk/bonescript so I should be able to leverage that.

[pdp7]

@MarkAYoder @jadonk Adafruit_BBIO still needs support for BeagleBone AI. This might be a good task for a student (if you know of anyone, Mark, or once GSoC starts).

[MalavPatel3501]

Here i create my custom .dts file and test all interfaces .if you facing issue regarding any interfaces then please follow below link :

https://github.com/MalavPatel3501/BeagleBone-AI--mpBBAI-IO-Python-Library

In this project you got .dts file and all pin muxing steps. Moreover i puts some example code in this project.

[simongtan]

BBAI compatibility would be really useful - thanks guys!

[pnallin]

@pdp7 any "release date" for BB-AI? Or, is there anyone working on it?

[pdp7]

@pnallin unfortunately there is not active work on it. However, I think Adafruit Blinka is a good alternative to this library (Adafruit_BBIO): https://github.com/adafruit/Adafruit_Blinka

There is support for the AI board by @makermelissa
adafruit/Adafruit_Blinka@8273fc6