potential GSOC project: Improve the Raspberry Pi BSP
Andre Marques
andre.lousa.marques at gmail.com
Wed Mar 19 19:59:56 UTC 2014
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 <mailto: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 <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 :
>>>>
>>>> "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
>>>> <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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>>>
>>>
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>>
>
>
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