potential GSOC project: Improve the Raspberry Pi BSP
Pierre Ficheux
pierre.ficheux at openwide.fr
Wed Mar 19 21:18:09 UTC 2014
Hi Alan,
----- Mail original -----
> De: "Alan Cudmore" <alan.cudmore at gmail.com>
> À: "Pierre Ficheux" <pierre.ficheux at openwide.fr>
> Cc: "Andre Marques" <andre.lousa.marques at gmail.com>, rtems-users at rtems.org
> Envoyé: Mercredi 19 Mars 2014 22:10:50
> Objet: Re: potential GSOC project: Improve the Raspberry Pi BSP
>
>
> Hi Pierre,
> We hope to use your GPIO implementation for this project. Any
> problems with incorporating it into the BSP?
No problem at all.
>
>
> For the USB and MMC support, the u-boot code would be nice, but it is
> GPL and not compatible with the RTEMS libraries. But it could serve
> as a reference.
I'm not aware of RTEMS licensing issue :) I know it's GPL with linking exception but what's the problem with "libraries" ?
>
>
> Also, I am not sure how to approach the USB and network
> implementation. For example, we could probably get the Ethernet to
> work, and the USB code would just be "a bunch of files" in the
> ethernet driver directory. But I think the right way would be to use
> the FreeBSD library support of the USB and Ethernet devices. I just
> don't know how to do that :)
I do agree. I talked about U-Boot for MMC support though it includes USB support too.
regards
>
>
> Alan
>
>
>
>
>
> On Wed, Mar 19, 2014 at 4:33 PM, Pierre Ficheux <
> pierre.ficheux at openwide.fr > wrote:
>
>
> USB should be interesting too on RPi because of Ethernet support ;)
>
> Regarding SD card you should take a look at U-Boot for RPi which
> includes MMC support in drivers/mmc. U-Boot includes USB support for
> RPi too in drivers/usb.
>
> https://github.com/gonzoua/u-boot-pi
>
> regards
>
> ----- Mail original -----
> > De: "Andre Marques" < andre.lousa.marques at gmail.com >
> > À: "Alan Cudmore" < alan.cudmore at gmail.com >
> > Cc: rtems-users at rtems.org
> > Envoyé: Mercredi 19 Mars 2014 20:59:56
> > Objet: Re: potential GSOC project: Improve the Raspberry Pi BSP
>
>
> >
> >
> >
> > Hello Alan,
> >
> > I have decided to go with the framebuffer instead of the USB
> > support.
> > Will update the proposal with this.
> >
> > Before GSOC I am considering to look at the SD card access through
> > the onboard card reader. What do you think?
> >
> > --André Marques.
> >
> > On 03/19/14 00:56, Alan Cudmore wrote:
> >
> >
> >
> > Hi André ,
> > I agree about the USB stack. I am not even sure about how to
> > integrate a driver that depends on the FreeBSD USB stack.
> >
> >
> > The GPIO driver from Pierre is the one I was referring to. I don't
> > think anyone ever made a decision on how to integrate the GPIO
> > driver. If we have macros in the BSP header files then the GPIO can
> > be programmed with the simple macros or the driver that Pierre
> > wrote. If the project decides to use the GPIO device model for
> > other
> > BSPs, then the generic driver code can be moved to a shared
> > directory at a later date.
> >
> >
> > Thanks for the update,
> >
> >
> > Alan
> >
> >
> >
> >
> >
> > On Tue, Mar 18, 2014 at 11:04 AM, Andre Marques <
> > andre.lousa.marques at gmail.com > wrote:
> >
> >
> >
> >
> > Hello,
> >
> > about the USB driver port from FreeBSD I am finding it difficult to
> > gauge how much work it would involve, so I will follow your
> > suggestion and look at something else.
> >
> > As for GPIO I belive the work that has been done is this:
> >
> > https://github.com/pficheux/raspberry_pi/tree/master/RTEMS/gpio_driver
> >
> > Am I right?
> >
> > I also found a discussion on the best way of implementing the
> > driver
> >
> > http://www.rtems.org/pipermail/rtems-users/2013-October/012059.html
> >
> > but i am not sure if that came to a decision.
> >
> > Meanwhile I will update the proposal with some basic info on the
> > drivers.
> >
> > --André Marques.
> >
> >
> >
> > On 03/14/14 13:16, Andre Marques wrote:
> >
> >
> >
> >
> >
> > Hello,
> >
> > 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 > 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 > 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 :
> >
> > "GSOC STUDENTS! PLEASE FILL IN THE APPLICATION AT
> > http://www.google-melange.com ! YOU CAN EDIT UNTIL THE DEADLINE!
> > BUT
>
>
> > YOU WILL NOT GET A SLOT IF YOU DO NOT APPLY THROUGH Google!!!"
> >
> >
> > Regards,
> > Hesham
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> > On Fri, Mar 14, 2014 at 1:16 AM, Andre Marques <
> > 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
> > http://www.rtems.org/mailman/listinfo/rtems-users
> >
> > --
> > Joel Sherrill, Ph.D. Director of Research & Development
> > joel.sherrill at OARcorp.com On-Line Applications Research
> > Ask me about RTEMS: a free RTOS Huntsville AL 35805
> > Support Available (256) 722-9985
> >
> > _______________________________________________
> > rtems-users mailing list
> > rtems-users at rtems.org
> > http://www.rtems.org/mailman/listinfo/rtems-users
> >
> >
> >
> >
> > _______________________________________________
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> > rtems-users at rtems.org
> > http://www.rtems.org/mailman/listinfo/rtems-users
> >
> >
> >
> >
> >
> >
> >
> >
> > _______________________________________________
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> > http://www.rtems.org/mailman/listinfo/rtems-users
> >
>
> --
> Pierre FICHEUX -/- CTO OW/OWI, France -\- pierre.ficheux at openwide.fr
> http://ingenierie.openwide.fr
> http://www.linuxembedded.fr
> I would love to change the world, but they won't give me the source
> code
>
>
--
Pierre FICHEUX -/- CTO OW/OWI, France -\- pierre.ficheux at openwide.fr
http://ingenierie.openwide.fr
http://www.linuxembedded.fr
I would love to change the world, but they won't give me the source code
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