[linux-dvb] Re: NEWSTRUCT and Remote Control

[Holger Waechtler <holger@convergence.de>]

Oliver Endriss wrote:
> On Wednesday 04 September 2002 12:28, Holger Waechtler wrote:
> 
>>Oliver Endriss wrote:
>>
>>>[...]
>>
>>hmm, I just tested again with the new firmware, it works fine for me.
>>Anyway, I found a typo in the README concerning the usage of
>>av7110_loadkeys. For the Hauppauge remote control you should use:
>>
>>$ ./av7110_loadkeys [-i] hauppauge.rc5 > /proc/av7110_ir
> 
> 
> Bingo! It works after *redirecting* the output of av7110_loadkeys to  
> /proc/av7110_ir. Thank you for the hint!
> 
> Just two suggestions:
> Please update the usage string of av7110_loadkeys, too.
> Perhaps you could add a line or two to the README file
> stating that there is absolutely *no* kernel output if the protocol 
> and/or inversion settings are incorrect. 

ok, I'll do so.


> I just played around with evtest and found the following:
> Approx. 0,5 sec after the key-down event you always get a key-up event, 
> no matter whether you hold down the key or not. Apparently, the new 
> firmware generates only key-up events. Is this ok?

it generates key-down events. When you lost the IR connection you 
definitely want to create an artificial key-up event to prevent endless 
keyrepeats from the linux input driver.


> The old firmware generated both down _and_ up events, so it was possible 
> to implement something like a auto-repeat function if you hold down the 
> key for more than a second.

The old firmware generated an up-event after each down-event. If you 
want this behaviour you can simply ignore the up-events and process only 
down's.

Hmm, the remote control I have generates an event every 1/5th second, so 
you still get keyrepeats. Maybe we have to enable the repeat option in 
the linux input driver for Hauppauge remote controls...

A proper keyrepeat-sequence looks like this: key-down-down-...-down-up. 
Only in this way the application can distinguish between a 
"double-clicked" key and a repeat because of a not-yet-released key. 
This convention is used by other keyboard and input drivers, too. We 
changed this behaviour to make it easy for applications to use the same 
input event loop for keyboards and remote controls.

Holger



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