RTEMS 4.12 on RPi Zero

[Alan Cudmore]

RTEMS should work on the Raspberry Pi Zero, but I have not tried RTEMS on
the Raspberry Pi Zero W. The "W" model has wifi and bluetooth, and like the
Raspberry Pi 3, the bluetooth is connected to the UART which is used by the
RTEMS console. I believe we need to write a new console driver for the Pi
Zero W and 3 models.

The rest of the Pi models, such as the non wireless Raspberry Pi Zero
should work, but there is a problem with newer Raspberry Pi firmware. I
don't know what the exact problem is, but reverting to an older version of
the Raspberry Pi firmware seems to work.

Try this release of the firmware on your SD card:
https://github.com/raspberrypi/firmware/tree/1.20160620/boot

Alan


On Wed, Sep 27, 2017 at 10:30 PM, William Busacker <wbusacker at outlook.com>
wrote:

> I've been having a lot of trouble attempting to get RTEMS running on a
> Raspberry Pi Zero, hoping someone can help.
>
> I've been following the steps outlined by
> http://alanstechnotes.blogspot.com/2013/03/rtems-on-raspberry-pi.html?m=1
> but changing all references of 4.11 to 4.12 and omiting /chrisj/ from
> the git path for rtems builder. My primary environment is Bash for
> Windows running Windows 10 Pro, however I have an Ubuntu 17.04 install
> that can target the exact same directory.
>
> At first, I made a brand new Raspbian boot SD and then replaced the
> kernel.img on the SD card with the img file created in Alan's last step,
> however that never does anything. One of the comments from that post had
> said to use the ticker.exe from
> /build-rtems-rpi/arm-rtems4.12/c/raspberrypi/testsuites/
> samples/ticker/ticker.exe
> instead of under /bsps however that too does not work. At this point I
> also noticed that the Makefile in /build-rtems-rpi/...../ticker hadn't
> fully run. When I ran that makefile, it failed saying that leaf.cfg:1
> *** missing separator. Stop.
>
> I have copied the 4.11.2 tarball from
> https://git.rtems.org/rtems-source-builder/ and build up the source
> builder from that, however when I get to the make install step, it
> errors out as several make files that it tries to run during the
> recursive step don't have install steps (or any steps, they're blank) so
> the make process stops.
>
> Any pointers or tips on how to get this working would be greatly
> appreciated!
>
> -Will Busacker
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>
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