Console driver that needs extra TIMER

[Gedare Bloom]

On Thu, Aug 14, 2014 at 10:15 AM, Joel Sherrill
<joel.sherrill at oarcorp.com> wrote:
>
> On 8/14/2014 9:11 AM, Kolja Waschk wrote:
>> Hi,
>>
>> I'm developing a DMA-based UART driver for Blackfin. It requires an
>> extra timer to trigger data processing after a transmission ended. This
>> increases the amount of timers required by every application that uses
>> it for the console.
> Don't you get an end of DMA TX interrupt?
>> E.g. most of the tests won't even start without modifications. So
>> effectively I have to fall back to a polling driver for console if I
>> want to run the tests unmodified, or is there any mechanism to generally
>> increment the amount of timers for all tests?
> I don't think so. There are some BSP hooks for various features and
> default number
> of termios ports. But nothing specific to an object.
>
If you are working with rtems.git, you could probably just add another
BSP setting in confdefs.h for this and push the patch out for
inclusion in RTEMS. Something like CONFIGURE_BSP_TIMERS() that gets
added into CONFIGURE_MAXIMUM_TIMERS(). If you need more guidance how
to do this just ask.

> I suppose one could be added but for orthogonality, it would make me wonder
> why we wouldn't also let you add a BSP factor on every Classic API object.
> Just thinking out load.
Joel, what kind of load?

There are probably only a few object-types that a BSP might need to
reserve for use, but it may be worth considering.

-Gedare
>> Thanks,
>> Kolja
>>
>>
>>
>>
>>
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>
> --
> Joel Sherrill, Ph.D.             Director of Research & Development
> joel.sherrill at OARcorp.com        On-Line Applications Research
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