Re: [tuxdroid-user] IR question

[David B. <da...@ja...>]

On Tue, 10 Apr 2007 01:08:52 +0200, Philippe Teuwen <ph...@te...>  
wrote:

> Hi,
>
> I try to understand how IR reception works.
> If I use the kysoh remote control, the tux gets the signals
> and its eyes blink as confirmation.
> It looks like, from the fw, any RC5 code would be accepted.
> But I tried with my tv and tv remote.
> The tux can control the tv, so sending RC5 commands.
> But my tv remote seems to not be understood by the tux,
> no led blinking :-(
>
> But in the fw I didn't see any check on the RC5 address before
> the led blink feedback so what does it means?
> The tux doesn't see my tv remote at all?

Indeed I don't check the address, you can use any RC5 code but at the  
moment only the command is sent back in the status iirc. That should be no  
problem to send the address too.

So if your remote is RC5, it should be seen by tux. I don't know why it  
doesn't, would need to have your remote to debug that. I have a KISS DVD  
remote control that mixes RC5 and other protocol keys (weird) but the RC5  
keys work just fine.

>
> Another question:
> RC5 greeting codes are:
> addr 0x4 + command random (light level sampling)
> addr 0x8 + command random (light level sampling)
> addr 0xC + command random (light level sampling)
>
> But couldn't they have bad effects on the devices mapped to those  
> addresses?
> addr 0x4 is a Laser Vision Player (?)
> addr 0x8 is Sat1, a settopbox I assume
> addr 0xC is a CD-Video
> We could take some reserved addresses instead: 7, B, D, F, 18, 19, 1B-1F

That code is to be removed or corrected. At a certain point in  
development, it somehow worked and 2 tuxs could see each other and do some  
greetings, but that doesn't work well anymore and this functionality  
should be implemented in another way. That was just a quick draft at that  
time and I never had the opportunity to rework it.

But to answer your questions, I used the address as a command and the  
random number as a tux identifier. And that indeed could clash with your  
equipment though the probability is quite low. We can change to reserved  
adresses anyway.

> And what is the addr code sent by the Kysoh remote?

It's 0x1D

david