[mythtvnz] Serial IR blaster on USB to serial cable

[tim Lockyer]

It would be possible to create the 40,000 requirements using hardware with a
*555* Timer *IC and a and gate. Probably the IR repeater sold by Jaycar
would do the job.*


**

*Tim
*


On Sun, Aug 22, 2010 at 2:37 PM, Robin Gilks <g8ecj at gilks.org> wrote:

>
> > Hi guys,
> >
> > I found a cheap serial IR blaster online the other day and bought it.
> > After it arrived I realised that I don't have a serial port on my
> > computer!  Just a parallel one - why you'd want a parallel over a serial
> > I don't know.  So I borrowed a USB to serial cable from a friend and it
> > is recognised by the system.  Problem is that when you install lirc and
> > you activate the blaster option it asks you for the serial port you are
> > using and the USB version is not an option.  Anyone know whether I can
> > actually make it work using this cable and what config file I might need
> > to modify to get the correct port working?
>
> No - it won't work. It *MUST* be a real serial port since if you look at
> the wiring it uses either the RTS or DTR output control lines and the lirc
> driver waggles them 40,000 times a seconds with great accuracy. You just
> can't do that with a USB stack.
>
> I hope the serial blaster was less than $2 as thats how much they cost...
>
> --
> Robin Gilks
>
>
>
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