Re: [Qemu-devel] Add virtual devices to QEMU

[Alberich de megres]

Thank you guys for the reply :)

One last question,
my device is like a physical console with buttons and indicators.

I saw the android emulator also draws the keyboard using a modified
version of the qemu.
Is there some kind of "presentation" layer, or the just modified the
window size and add it there? do you know how does it works?

thanks once again

On Mon, Jun 25, 2012 at 6:19 PM, Andreas Färber <address@hidden> wrote:
> Hello,
>
> Am 25.06.2012 12:59, schrieb Alberich de megres:
>> Together with some colleagues, we are developing a USB hardware. But
>> as the prototype is not ready to be built, and is not cheap,
>> or idea is to develop at the same time a virtual device for the qemu.
>>
>> I searched for documentation about the USB layer on qemu but I could
>> not find a good point. Which would be a good starting point (in the
>> qemu)? is it better to create a new machine type? or make it a command
>> line option ike --mynew-usb-dev?
>
> Depends on what you want to do with the virtual device.
>
> If you want to develop and test drivers for your device (i.e., your
> device plugged into a PC) then look at the hw/usb/ devices pointed to by
> Stefan. The file include/qemu/object.h contains some more inline
> documentation on the new underlying object model.
> You can then add the device via -device yourdevicename. (New options
> like --mynew-usb-dev should be avoided.)
>
> If however you want to prototype the firmware for your USB hardware,
> then you need to check if QEMU has support for that MCU, add a new
> machine type and use it through qemu-system-thearch -M yourboard. I'm
> not aware of any example that exposes itself as a USB device. The CCID
> emulation uses a much simpler, host-driven protocol AFAIU.
>
> Regards,
> Andreas
>
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