On 2012-05-11, Remy Bohmer <linux@xxxxxxxxxx> wrote:
> Hi,
>
> 2012/5/10 Grant Edwards <grant.b.edwards@xxxxxxxxx>:
>>> If the 20usec requirement is hard, you can also look at using an FIQ.
>>
>> Does the normal AT91 kernel not use FIQs at all? ?If so, I might be
>> able to dedicate the FIQ to this function and have it happen without
>> the Linux kernel knowing about it (or affecting it). ?Any
>> communication between it and a normal user-task would have to be
>> handled carefully...
>
> No, the kernel does not use the FIQ at all. It is free for you to use
> as you want. Communication with the FIQ handler can be done using a
> queue based on atomic instructions.
Thanks! I was about to start looking into that...
--
Grant Edwards grant.b.edwards Yow! I just forgot my whole
at philosophy of life!!!
gmail.com
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