USB Host and MMC/SD Card Stack

Sebastian Huber sebastian.huber at
Wed Jun 17 13:44:22 UTC 2015

On 17/06/15 15:16, Martin Galvan wrote:
> On Wed, Jun 17, 2015 at 9:49 AM, Sebastian Huber
> <sebastian.huber at> wrote:
>>> Is there an easy way to port these to RTEMS? I'm not sure how much the
>>> BSD driver infrastructure has changed since 8.2.
>> It is actually FreeBSD 9.3, but I don't know how the USB stack evolved.
> Is the USB stack also 9.3? I seem to recall that only MMC/SD was 9.3,
> and USB was 8.
> How difficult would it be to update the USB stack? I'm not all that
> familiar with libbsd yet, but if it's not too big a task I may give it
> a shot.

Its not a good idea to only update subsystems. It makes more sense to 
update everything.

Sebastian Huber, embedded brains GmbH

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