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Re: Ubuntu Multitouch Kernel Driver Development - Details and testing


Ok thanks,

I have the device working as a working pointer device as well now. Nice! :)

One more questions arises at this point. What is the best way of communicating with the device now?

I have a control panel that needs to change settings and instruct the driver to perform actions on the device.

My first try while developing this driver started with a simple usb driver example. That example had implemented the file open and close, write and read of the device thru the file system.

Should I use that same mechanism? Or is there any other way of doing it, more appropriated for an input device?

Thanks in advance,

With my best regards,


On 11/10/2011 03:55 PM, Stephen M. Webb wrote:
On 11/10/2011 10:29 AM, Nuno Santos wrote:

Can I interact with the operating system like I do with a mouse? What
event should I concern with?

Should I look to any example in particular in linux input source for
touchscreens or any will do in general?
Yes and no:  the X server interprets single-touch input as pointer
events.  It is not exactly like a mouse, since a mouse is a relative
device and usually has buttons, a touch is an absolute device that does
not have buttons.

Since the interpretation of war input events is done in the X server,
you can look at the linux input source for any touchscreen for examples.
  Your best bet is to follow the type B protocol documented in the kernel

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