I've been using a MyBlaster with my DishTV receiver for some time now with no problems. The receiver sometimes gets hung up, but that happens with the hand remote as well:-) I use a Pundit and dual PVR-250s.
On Thu, 2005-10-27 at 11:41 -0400, Dan Wilga wrote: > I have also experienced problems using LIRC to send IR signals > through the serial port. I believe the reason is LIRC's reliance on > the (low priority) RTC interrupt for timing. LIRC toggles a single > serial port control line up to 56,000 times per second, to directly > turn an LED on/off. If another thread takes control away from LIRC > for too long, a pulse gets stretched and the IR device becomes > confused. > > However, this problem shouldn't affect devices like MyBlaster, > because its software uses standard serial I/O to send information to > the device. A single IR code consists of just a few bytes of data > sent using a slow (compared to LIRC) baud rate of 19,200 bps. The > MyBlaster then translates these few bytes into the many IR pulses > necessary to control the device. > > I'm really surprised, and somewhat disappointed, to hear that even > MyBlasters have trouble. I was actually considering buying a > MyBlaster or constructing something similar on my own using a > microcontroller. > > Maybe I'll set up a test to just send serial bytes in a predictable > order and see if they get garbled or missed over time while Myth is > displaying video. > > My setup incudes a 3.0 GHz P4 running on an ASUS motherboard that use > the ATI chipset. So none of that matches the original poster. > > I am also using a PVR-250 and a PVR-350. There's no secondary video > card; I'm using the onboard ATI video. > _______________________________________________ > mythtv-users mailing list > mythtv-users@mythtv.org > http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users
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