Re: IR blaster - every button works except one

[Jarod W. <ja...@wi...>]

On 07/20/2009 03:52 PM, Christoph Bartelmus wrote:
> Hi!
>
> Jarod Wilson "ja...@wi..." wrote:
>
>> On Jul 20, 2009, at 2:15 PM, Peter Budny wrote:
>
>>> I have a serial IR blaster to control my cable TV set-top box. It's a
>>> standard Comcast/Motorola deal, and I'm using the codes from
>>>
>>> http://lirc.sourceforge.net/remotes/motorola/DCT2524
>>>
>>> My problem is that the code for "0" won't send.  This is the right
>>> remote control, AFAIK, and all the other numbers work, just not 0.
> [...]
>> Heh, I've hit this exact same problem, just forgot about it 'til you
>> mentioned it. I suspect there's something not quite right with the
>> handling of the IR code for '0', which is 0x00000000, aka NULL, for
>> Motorola set top boxes... Christoph may know off the top of his head
>> how to fix this, otherwise, I need to put this on my TODO list for one
>> of these evenings...
>
> My guess is that the timing data is slightly off and the receiver gets out
> of sync if you send the same bit over and over again (the value is 0xffff
> in this config file because the values of one and zero are swapped
> compared to other config files):

I'm actually using the DCT2224 config file, which doesn't have them 
swapped, but same difference. I've got:

   one           563  4420
   zero          563  2180

>
>    one             556  2185
>    zero            556  4424
>
> I'd try with
>    one             556  2085
> or
>    one             556  2285

I tried both 'zero 556 2080' and 'zero 556 2280' with no change in behavior.

> Adding
>    min_repeat 2
> may also help.

Going back to 2180 and adding min_repeat 2 seems to be the ticket.

--jarod