CMSIS?

Tue Sep 2 15:15:55 UTC 2014

On 9/2/2014 9:52 AM, Daniel Gutson wrote:
> On Tue, Sep 2, 2014 at 11:51 AM, Joel Sherrill
> <joel.sherrill at oarcorp.com> wrote:
>> This is the license.
>>
>> The big problem I see first is the typical use only on our hardware
>> and that in order to redistribute, we must ensure that it is only
>> used on ARM hardware.
>>
>> This is a common restriction on vendor provided software and I
>> honestly don't know how to address including anything which
>> wants an open source project to ensure that anyone downloading
>> only uses it on the appropriate hardware.
>>
>> We have seen similar licenses from at least four vendors.
>>
>> If someone is able to crack this nut and find a way to not incur
>> liability for the RTEMS Project, I am open to ideas. But skeptical.
> Would this mean that an implementation from scratch would be the best choice?
Unfortunately, that's the solution we have always arrived at. If the
specification
itself doesn't have restrictions on implementations.

With that said, if there is an independent open source implementation
which is
portable, we have sometimes had luck in going that route. Even when it
required
asking for a license change.

DISCLAIMER: I have no idea what the specification says technically. I
looked at the
figure and the license. Seems useful enough for cross-platform ARM code.
And
if some of those features are appropriate, this would allow
cross-platform to
non-ARM targets. But that is clearly not in ARM's best interests for
their own
implementation.

--joel
>
>> --joel
>>
>> ========================================================
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>> ========================================================
>> On 8/29/2014 11:52 PM, Chris Nott wrote:
>>> Absent answer means no.
>>>
>>> I had the same idea. Actually I have played around with using vendor
>>> libraries from TI and ST, and there is no problem compiling them in. I
>>> can't see any reason CMSIS wouldn't fit in fine too. Actually from
>>> memory the useful parts of CMSIS comprise two parts, ARM specific
>>> intrinsic instructions and register locations in a header file, and
>>> reasonable math libraries. It shouldn't be a bit deal to use these, I
>>> would ignore the CMSIS linker scripts and such though.
>>>
>>> I would like to see CMSIS and parts of the vendor libraries integrated
>>> with RTEMS if possible, but I am uncertain about licensing
>>> compatibility. It seems daft to have to rewrite register locations and
>>> platform specific instructions if the vendors provide them..
>>>
>>> Regards,
>>> Chris.
>>>
>>>
>>> On 29/08/2014 10:04 AM, Daniel Gutson wrote:
>>>> absent answer means NO?
>>>>
>>>> Thanks,
>>>>
>>>>      Daniel.
>>>>
>>>> On Thu, Aug 28, 2014 at 11:31 AM, Daniel Gutson
>>>> <daniel.gutson at tallertechnologies.com> wrote:
>>>>> Hi,
>>>>>
>>>>>     is there any precedent regarding a CMSIS abstraction layer
>>>>> implementation on RTEMS?
>>>>>
>>>>> Thanks,
>>>>>
>>>>>     Daniel.
>>>>>
>>>>> --
>>>>>
>>>>> Daniel F. Gutson
>>>>> Chief Engineering Officer, SPD
>>>>>
>>>>>
>>>>> San Lorenzo 47, 3rd Floor, Office 5
>>>>>
>>>>> Córdoba, Argentina
>>>>>
>>>>>
>>>>> Phone: +54 351 4217888 / +54 351 4218211
>>>>>
>>>>> Skype: dgutson
>>> _______________________________________________
>>> devel mailing list
>>> devel at rtems.org
>>> http://lists.rtems.org/mailman/listinfo/devel
>> --
>> 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
>>
>>
>> _______________________________________________
>> devel mailing list
>> devel at rtems.org
>> http://lists.rtems.org/mailman/listinfo/devel
>
>
> --
>
> Daniel F. Gutson
> Chief Engineering Officer, SPD
>
>
> San Lorenzo 47, 3rd Floor, Office 5
>
> Córdoba, Argentina
>
>
> Phone: +54 351 4217888 / +54 351 4218211
>
> Skype: dgutson

-- 
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