Rockbox mail archive
Subject: Re: Serial connection and Rockbox?
From: Joseph Jones (joe_at_bumpycarrot.cjb.net)
Linus Nielsen Feltzing wrote:
> Joseph Jones wrote:
>> 1. Does the JBR require any internal modification to have a serial
>> port? Am I correct in saying that there is a serial line on a 4th pin
>> on the Line-In?
> There is a serial port input on the 4th ring on the Ear Out jack on the
> Studio and on the JBR, but not on the FMR or V2. This input goes to the
> internal UART on the CPU, capable of RS232 communication on 38400
> (Studio) and 115200 (Recorder) bps.
> However, this pin can also be configured as a general purpose output
> pin, making it possible to transmit as well, by fiddling the bits "by
> If you want full duplex serial I/O you have to open up your unit and
> reroute a wire or two.
Right, so it's kinda... half-duplex without modding the box?
So... some kind of two-way communication is possible without internal
modding, though it may not be overly fast?
Page was last modified "Jan 10 2012" The Rockbox Crew