[mythtv-users] HDPVR IR blaster slow

[Joseph Fry]

On Sat, Jun 20, 2015 at 3:32 PM, Hika van den Hoven <hikavdh at gmail.com>
wrote:

> Hoi Gary,
>
> Saturday, June 20, 2015, 9:13:48 PM, you wrote:
>
> > On Sat, Jun 20, 2015 at 6:43 PM, Joseph Fry <joe at thefrys.com> wrote:
> > ....
> >> I know that i2c_master_send can handle up to 64k... so I think I may
> try and
> >> force it to send everything in one go rather than breaking it up.  I
> doubt
> >> it will work, but it would be interesting if it did.
> >>
> >> Beyond that, I can't see anything else to do to make this faster.
>
> > You will likely have to look at the IC datasheets, HD-PVR schematics,
> > and HD-PVR firmware (only the first is likely publicly available) to know
> > what can be sent across the i2c bus.  It can be fun experimenting and
> > reverse engineering, but it may not be successful.
>
> > At some point, it is likely going to be worth your time to simply
> purchase
> > another transmitter (but you probably already knew that).
>
> > Good luck.
> > _______________________________________________
>
> If you have a serial port available, it's not very complicated to
> solder your own ir-receiver or transmitter. Schematics can be found
> through the lirc site.
>

I do have serial ports... but only two, and I have 4 STB's to control.
Additionally, I know it can be complicated getting multiple serial ports
working with LIRC (I believe the drivers only support a single instance?)

I have started looking at building an FTDI based USB transmitter.
Supposedly they can support any combination of 4 IR transmitters/recievers:
http://www.huitsing.nl/irftdi/

It's just frustrating because what I have should work... I just have to
find the source of this lag.
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