Preliminary B+ HAT (Hardware Attached on Top) docs/specs

[AndrewS]

That would mean I don't have to change anything.
Cool!

Exactly

Only thing you'll need to add will be to "enable UART" in config.txt (when the new firmware is released), but that's a one-time thing which you'll want to leave permanently enabled.

[panik]

^ Fair enough

A few things and I'll get out of y'alls hair.

From http://elinux.org/RPi_config.txt
[...]

Nope, that documentation is wrong. The correct documentation is at http://www.raspberrypi.org/documentatio ... fig-txt.md

Currently, the last line of /boot/config.txt says:

# for more options see http://elinux.org/RPi_config.txt

That's how I got there. But thanks for the explanation (our posts crossed as well).

Also, minor typo in title of second paragraph: "Indroduction" in README.md for https://github.com/raspberrypi/hats

It really nice to have a spec. It gives us something to relate to. Thanks to all involved!

[AndrewS]

Nope, that documentation is wrong. The correct documentation is at http://www.raspberrypi.org/documentatio ... fig-txt.md

Currently, the last line of /boot/config.txt says:

# for more options see http://elinux.org/RPi_config.txt

That's a very good point! I've emailed asb (the Raspbian maintainer) to suggest it as a future change

Also, minor typo in title of second paragraph: "Indroduction" in README.md for https://github.com/raspberrypi/hats

Thanks https://github.com/raspberrypi/hats/pull/12

[hifiberry]

Any news on the Kernel development for HAT support? Auto-loading the right kernel modules would really help users and this should be possible with the data from the HAT EEPROM.

Best regards
Daniel

[joabakk]

So if I understand this thread correctly, we can design the hats and program the eeproms, but there is no way of using the eeprom info in shell or scripts?
Excellent work so far, but I am eager to start testing. Does anyone have a timeline for when the next/final step will come?

[ShiftPlusOne]

Device tree data can be accessed through /proc. I don't know if there's currently a way to read the vendor data and the other atoms, but there should be eventually.

Things are a bit busy with Astro-Pi and all that, so I think pulling a timeline out of nowhere would just disappoint people.

[kholi]

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