[mythtv] Interface to HID remote devices

[dave]

Clint,

The way I would approach this is to hack the kernel to map the remote keys to
what you want. I did this for the Twinhan remote see the bottom of 

http://www.mythtv.org/wiki/index.php/Twinhan_Ter_or_MiniTer_DVT_PCI

This way you dont need to worry about X or Qt or LIRC just remap to the remote
key set. Modifying hid-input.c as I did allows you to support a usb keyboard
and remote at the same time without the key mapping interfering with each other. 

The missing keys is probably because they are being mapped to nothing in
hid-input.

I'm taking the same approach for a USB remote that came with a product called
USB Radio XTreme (cheapest remote I could find locally in Australia and I
needed another one for a frontend I'm building). I've written a kernel driver
for it that remaps the keys to my current myth key settings.

Regards
David

p.s. hid-input.c is front event driven USB HID devices. It handles a rnge of
devices including keyboards, mice, joysticks. FOr keyboaords it basically
receives input event from the device which is a key number indexed from 0. It
then does a translation using a simple array to determine what key event this
should be translated to and then generates the input event. 

On Mon, 4 Jun 2007 12:14:51 -0400 (GMT-04:00), Clint Eaker wrote
> I'm trying to investigate using a HID remote control device 
> (Logitech UltraX remote) with Mythtv.  Basically, it appears to the 
> system as a HID keyboard.  What I'm finding using EditKeys is that 
> while many of the keys on the remote are recognized by Mythtv, many 
> of the media remote oriented keys are not acknowledged by Mythtv at 
> all (pressing the button on the remote to map the key/button within 
> EditKeys simply does nothing).
> 
> I have determined that support for the Logitech UltraX remote has 
> been added to hid-input.c (http://lkml.org/lkml/2005/9/10/197).  I'm 
> assuming that what's going on is that Mythtv is listening for 
> standard keyboard input.  It appears that somewhere along the line 
> the remote buttons that don't map to a standard keyboard are getting 
> dropped (buttons like 'DVD' or 'TV').  I don't know whether they are 
> being ignored by the standard keyboard driver or ignored by Mythtv 
> (I suspect the former, but that's just a guess).
> 
> The biggest challenge I'm running into is simply finding any kind of 
> description of how any of this works.  I'm not familiar with the 
> linux architecture for handling user input or how it is received by 
> applications.  My suspicion is that to get this to work, Mythtv 
> would have to be modified to recognize and listen to a separate 
> interface in the HID driver that provides the key presses that are 
> not part of the standard keyboard.  But I don't know how to confirm this.
> 
> Can anyone point me in the right direction for how I might be able 
> to make some progress on this?  Anything would be appreciated 
> (suggestions on this forum, other forums that might be more suited 
> to these questions, HOWTOs, documentation, anything).
> 
> Thanks,
> Clint
> 
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