Looking for BSP for Atmel AT91SAM7X-EK

[Joel Sherrill]

Kate Feng wrote:
> Till Straumann wrote:
>> Ralf Corsepius wrote:
>>   
>>> On Wed, 2007-12-12 at 21:27 -0700, Andrei Chichak wrote:
>>>   
>>>     
>>>> Thanks Joel,
>>>>
>>>> Are there any docs around dealing with putting together a new BSP? I 
>>>> have taken a look at the BSP and porting guides but there doesn't 
>>>> seem to be a section on which configuration files to munge to get the 
>>>> bootstrap procedure to pick up the new BSP.
>>>>     
>>>>       
>>> Well, actually, it's pretty simple.
>>>
>>> 1. cd <src>/c/src/lib/libbsp/<cpu>
>>> and copy over the BSP which resembles to your BSP most
>>> cp <bsp> <mybsp>
>>>
>>> 2. edit your bsp's files below <mybsp>/
>>> [The actual act of porting]
>>>
>>>   
>>>     
>>
>> If I may comment: that would be pretty bad practice.
>> A better way would be
>>  - make parts in <bsp> that are similar enough to what
>>    'mybsp' needs a library that supports both, <bsp> and
>>    <mybsp>. Try to make interfaces generic enough so that
>>    they could be useful to a yet more similar BSP that
>>    may be created in the future (but also: try to keep it simple).
>>  - modify <bsp> so it uses the (new) library
>>  - let <mybsp> use the library
>>  - only add new parts that are really specific to <mybsp>
>>
>> The myriad of powerpc BSPs are a painful example of
>> the result of the 'copy + edit' strategy when creating new
>> BSPs. It's maintenance hell.
> I somehow agree with what Ralf Corsepius wrote :
> > The poor shape the powerpc BSPs are in is a result of lack of RTEMS
> > internal APIs and structural defects of the source code (esp. the
> > "shared" dirs).
>
> Technically speaking, to reduce maintence effort effectively, one
> should start to think about C++ for Object Orient Programming.
>
>   
If you want to write applications in C++, I am all for it
and do it myself.  But don't introduce it in the BSPs or
device drivers in RTEMS.

It is appropriate to think about OO design techniques.

--joel
> Kate
>   
>> T.
>>   
>>> 3. cd <src>/c/src
>>> ../../bootstrap
>>>
>>>
>>> The next configure run should pick up <mybsp> automatically.
>>>
>>> Ralf
>>>
>>>
>>> _______________________________________________
>>> rtems-users mailing list
>>> rtems-users at rtems.com
>>> http://rtems.rtems.org/mailman/listinfo/rtems-users
>>>   
>>>     
>>
>>
>> _______________________________________________
>> rtems-users mailing list
>> rtems-users at rtems.com
>> http://rtems.rtems.org/mailman/listinfo/rtems-users
>>   
>
> ------------------------------------------------------------------------
>
> _______________________________________________
> rtems-users mailing list
> rtems-users at rtems.com
> http://rtems.rtems.org/mailman/listinfo/rtems-users
>