[Xenomai] USB 3.0 on Xenomai

[Xenomai] USB 3.0 on Xenomai

[Glen Wernersbach]

Hi All,

Back to this question.

If I wanted to write a very specific one trick pony RTDM driver for a USB
3.0 controller that would do basic read and writes to my vendor specific
device where would I start?

I just need them to run in real time.


Glen
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Re: [Xenomai] USB 3.0 on Xenomai

[Jan Kiszka]

On 2012-09-13 21:30, Glen Wernersbach wrote:
> Hi All,
> 
> Back to this question.
> 
> If I wanted to write a very specific one trick pony RTDM driver for a USB
> 3.0 controller that would do basic read and writes to my vendor specific
> device where would I start?

Well, by reading the xHCI spec ;). Seriously, USB is not UART. There has
quite a lot of hard- and software between a serial data stream on the
device side and a potential rtserX RTDM interface for a Xenomai
application. To get an impression, you can study usb4rt [1].

We are about to add a cdc-acm driver to that stack, also "only" a simple
serial interface but still a bit of code. And we are reusing the
existing UHCI host controller + core stack.

Are you sure your device makes use of USB-3.0's super speed? Or does
your target only include an xHCI, and there is no way to add a good-old
UHCI to it?

Jan

[1] http://developer.berlios.de/projects/usb4rt

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