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Subject: Re: Two-way serial comms with no internal mods...
From: Linus Nielsen Feltzing (
Date: 2004-02-24

Joseph Jones wrote:
> I talked about this earlier a bit...
> Since two-way communication is possible if we use both the line-in's pin
> and the in-line remote pin (man, that looks dumb written like that :) ),

I sure didn't understand what you meant :-)

Two-way communication is possible by changing the direction of the only
pin there is, the remote control input pin.

> would the system be able to talk to PC-style hardware through a serial
> port?

Yes, but not without special hardware in between, both for voltage
conversion and to split the Input and Output to the Rx and Tx pins of
the PC port. I don't know much about PC hardware, but I assume that it
can't change the direction of the serial port pins.

Also, you need to write a special protocol for the PC, as the
communication can only go in one direction at a time.



Page was last modified "Jan 10 2012" The Rockbox Crew