potential GSOC project: Improve the Raspberry Pi BSP

Andre Marques andre.lousa.marques at gmail.com
Fri Mar 14 13:16:37 UTC 2014


On 03/14/14 02:33, Alan Cudmore wrote:
> Andre,
> I think your project proposal looks good, but I wonder if including 
> USB support is too much. There are low level "bare metal" USB examples 
> out there for the Raspberry Pi, and that may serve as a starting 
> point, but I think a real USB implementation will use the BSD library 
> that has been ported to RTEMS. It may be possible, since there is a 
> FreeBSD port to the Raspberry Pi. Maybe others can help here.

I will take a look into this.

> If you think that GPIO, SPI, and I2C are not enough, then you could 
> always look at the framebuffer or SD card access.

Yes, right now I am trying to clarify everything the best I can so I 
don't end up with a lot more (or less) work than I can handle.

> Finally, it may be necessary to have an Raspberry Pi and a few 
> peripherals. For example, I have an inexpensive I2C compass module 
> that I use with linux, and I have a breadboard wired up with LEDs to 
> test GPIO.

Right now I have access to a Raspberry Pi at the university, not sure 
about the peripherals though. Anyway, if this projects really goes 
forward I will get myself a raspberry and peripherals (I have already 
some other components, like a breadboard, leds, wire, etc).

> Thanks,
> Alan
> On Thu, Mar 13, 2014 at 8:32 PM, Alan Cudmore <alan.cudmore at gmail.com 
> <mailto:alan.cudmore at gmail.com>> wrote:
>     I'm glad there is interest in this project. Andre, I will read
>     your proposal and provide feedback.
>     Joel, I was on the melange site and the system recognizes my
>     account. Do I need to do anything to be a mentor for RTEMS?
>     Alan
>     On Thu, Mar 13, 2014 at 7:31 PM, Andre Marques
>     <andre.lousa.marques at gmail.com
>     <mailto:andre.lousa.marques at gmail.com>> wrote:
>         It is now on melange too.
>         --André Marques.
>         On 03/13/14 23:21, Hesham Moustafa wrote:
>>         Hi Andre,
>>         I quote from RTEMS SoC page :
>>         http://www.google-melange.com! YOU CAN EDIT UNTIL THE
>>         THROUGH Google!!!"
>>         Regards,
>>         Hesham
>>         *
>>         *
>>         On Fri, Mar 14, 2014 at 1:16 AM, Andre Marques
>>         <andre.lousa.marques at gmail.com
>>         <mailto:andre.lousa.marques at gmail.com>> wrote:
>>             Hello,
>>             I just posted the first proposal draft for "Raspberry Pi
>>             BSP Peripherals " in the RTEMS Wiki
>>             http://wiki.rtems.org/wiki/index.php/RTEMSSummerOfCode
>>             Any feedback is more than welcome. Should I post it
>>             already in melange too?
>>             --André Marques.
>>             On 03/13/14 15:26, Joel Sherrill wrote:
>>>             On 3/13/2014 9:46 AM, Andre Marques wrote:
>>>>             Hello,
>>>>             I would be very interested in working in this project
>>>>             because I'm currently trying to work with Raspberry Pi
>>>>             and RTEMS for my undergraduate thesis, so this could be
>>>>             a great followup to that for the summer.
>>>>             I will need to do some reseach on it before making a
>>>>             proposal (the time is also gettting shorter), but will
>>>>             post a proposal draft very soon.
>>>             This would be a great area to work. As Alan says, the
>>>             list is likely too much for
>>>             one student, so it seems likely that the work could be
>>>             divided for two students
>>>             working on different parts.
>>>             For the Pi Master list, I would like to add the Geert
>>>             board. That looks like something
>>>             of interest to RTEMS folks.
>>>             --joel
>>>>             --André Marques.
>>>>             On 03/13/14 11:23, Alan Cudmore wrote:
>>>>>             ( I posted this to the rtems-devel list by mistake, my
>>>>>             apologies for the duplicate message )
>>>>>             f there are still potential GSOC students out there
>>>>>             looking for a project, I would like to offer a
>>>>>             potential project to work on: Improving the Raspberry
>>>>>             Pi BSP. I would be happy to mentor a student for this
>>>>>             project. Below is my description for the task.
>>>>>             Thanks,
>>>>>             Alan
>>>>>             One of the RTEMS Open Projects is to contribute a BSP
>>>>>             or Board Support Package for readily available boards.
>>>>>             The Raspberry Pi is probably the most available board
>>>>>             at $25 and $35 USD, and there have been over two
>>>>>             million of these boards sold. The RTEMS head (4.11)
>>>>>             currently has a basic BSP for the Raspberry Pi,
>>>>>             supporting the CPU, a single UART, and timer. It is
>>>>>             enough to run some basic RTEMS programs, but expanding
>>>>>             the BSP to support peripherals will make it much more
>>>>>             useful.
>>>>>             For this project, the GSOC student could improve the
>>>>>             peripheral support for the Raspberry Pi BSP.
>>>>>             The peripherals we need to support (in order of
>>>>>             increasing difficulty) include:
>>>>>             1. GPIO (This has been done by one user, but is not
>>>>>             integrated)
>>>>>             2. I2C Bus
>>>>>             3. SPI Bus
>>>>>             4. Secure Digital card read and write support (using
>>>>>             the SPI bus)
>>>>>             5. Graphics / RTEMS Framebuffer Support (I have a
>>>>>             graphics demo working in an RTEMS task)
>>>>>             6. USB Device support
>>>>>             7. HDMI/Graphics console (Requires framebuffer support
>>>>>             and USB or GPIO connected keyboard device)
>>>>>             8. Ethernet network support (Requires USB support)
>>>>>             The entire list is probably too much for a single
>>>>>             student to accomplish, so we can adjust the list of
>>>>>             work according to what is possible.
>>>>>             It may also be a good idea to add support for both
>>>>>             models of the Raspberry Pi (256MB and 512MB) and be
>>>>>             able to configure the memory map in the BSP to match
>>>>>             the boot time split between the CPU and GPU memory.
>>>>>             Finally, in order to do some of this coding, it may be
>>>>>             necessary to come up with a more efficient way to load
>>>>>             and debug code on the Raspberry Pi. Options include
>>>>>             using U-boot or connecting a JTAG debug device to load
>>>>>             code.
>>>>>             _______________________________________________
>>>>>             rtems-users mailing list
>>>>>             rtems-users at rtems.org  <mailto:rtems-users at rtems.org>
>>>>>             http://www.rtems.org/mailman/listinfo/rtems-users
>>>             -- 
>>>             Joel Sherrill, Ph.D.             Director of Research & Development
>>>             joel.sherrill at OARcorp.com  <mailto:joel.sherrill at OARcorp.com>         On-Line Applications Research
>>>             Ask me about RTEMS: a free RTOS  Huntsville AL 35805
>>>             Support Available(256) 722-9985  <tel:%28256%29%20722-9985>
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