Messages in this thread | | | Date | Tue, 25 Aug 2009 13:36:19 +0200 | From | Pavel Machek <> | Subject | Re: Purpose of parameter in sysfs binary read |
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Hi!
> > If its a bitmap image why not register the device as a framebuffer ? > > > > Would that preclude it also being registered as a HID? The primary purpose > of the device is to function as a keypad input. > > But, in addition to sending keystroke output you can send a usb control > message to change the backlight color and an interrupt message to load a > bitmap as an image. > > The bitmap itself is simple, but requires a specific format. Byte 0 must > be 0x03 followed by 31 bytes of null. The low bit of byte 32 is x,y (0,0) > second high bit is (0,1)... with low bit of byte 33 being (1,0)...
Sounds very much like auxdisplay things we already have in tree...
-- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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