[mythtv-users] Re: Homebrew PVR Multi-Circuit

[Tim Tait]

Gert van der Knokke wrote:

> Tim Tait wrote:
>
>>
>> USB sounds better to me too. Serial ports are vanishing...
>>
>> But USB is a logical bus, not a physical bus topology, so putting 
>> both on one physcal set of wires won't work, a hub is needed.
>>
>> Though if you had an advanced multi-function USB chip it may support 
>> two devices internally. I don't know the PL2303 well enough to comment.
>>
> As the device is a USB to serial adapter it will have both TX out and 
> RX in or vice-versa and a bunch of status/control lines. If you hook 
> this up to a microcontroller you can send button and IR receive 
> information to the PC and display the information send from the PC on 
> the LCD display.
>
> One USB device can do many things, for example an scanner/printer/fax 
> combo. I just wanted to state that there is no need for two physical 
> connections
>
> But nowadays there a microcontrollers with integral USB support, maybe 
> they are even more suitable for this kind of project.
>
> Gert

True, but then the dirvers need to be aware it's two devices in one...

Tim