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Subject: Re: PIC12C508A-based remote
From: Rob Ward (wards_at_paradise.net.nz)
Date: 2002-12-18


I suppose so. Well, I suggest someone with some time look at the NEC
protocol for the open source remote. I have just written some code to
decode it, but is for a customer, so I cannot release it.

I presume the remote is going to plug into the SPDIF port?

Rob

Steve Russell wrote:

>Rob,
>
>While this could be done with a home-grown remote and cooperation from
>Rockbox, the standard remote would not benefit. That said, it might be worth
>doing anyway....
>
>Steve.
>
>
>"Rob Ward" <wards_at_paradise.net.nz> wrote in message
>news:3E002011.70402_at_paradise.net.nz...
>
>
>>There is an easy way to tell if the keys are held down. The NEC protocol
>>used in your TV remote control for example does the following...
>>
>>1. If a button is pressed, it sends a device byte and it's complement,
>>then a function byte and it's complement.
>>2. If the key is held, it sends the first packet as above, the changes
>>to a simple "repeat key" packet.
>>
>>Rob
>>
>>Leif Sawyer wrote:
>>
>>
>>
>>>Linus writes in response to
>>>
>>>
>>>
>>>
>>>>Steve Russell who wrote back:
>>>>
>>>>
>>>>
>>>>
>>>>>Thanks Frank - I'd hoped the Archos unit would FF/REW, but
>>>>>it seems not. There's no reason, of course, that rockbox
>>>>>couldn't implement that.
>>>>>
>>>>>
>>>>>
>>>>>
>>>>Yes there is. There is no way of telling that the repeated
>>>>events sent from the remote are because the key is held
>>>>down or repeatedly pressed.
>>>>
>>>>
>>>>
>>>>
>>>So we don't have a method of determining how quickly the
>>>key-presses come in? The keys are already 'de-bounced' when
>>>we get the notification, right? So a timer would let us know
>>>if the keypresses were faster than some threshold.. (100 ms?)
>>>Anything under that threshold would be counted as 'continuous'
>>>and anything over that would be individual keys..
>>>
>>>Could actually get tricky though, but I would think it's doable.
>>>Whether the payoff is actually worth it, is another question.
>>>
>>>
>>>
>>>
>>>
>>>
>>
>>
>
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Page was last modified "Jan 10 2012" The Rockbox Crew
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