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Rockbox mail archiveSubject: Re: Serial connection and Rockbox?Re: Serial connection and Rockbox?
From: BlueChip <cs_bluechip_at_webtribe.net>
Date: Wed, 11 Feb 2004 00:47:07 +0000 At 22:28 10/02/04, you wrote: >[IDC]Dragon wrote: >>>Right, so it's kinda... half-duplex without modding the box? >> >>Correct. >> >>>So... some kind of two-way communication is possible without internal >>>modding, though it may not be overly fast? >> >>Yes, I use this e.g. for my Alpine CD changer emulation, to hookup to a car >>stereo. It doesn't require much speed. >>The max. baudrate on the RX (remote) pin is 345600 Baud for a recorder, >>Clk/32. The transmit would have to be done by bitbanging, which can also >>be quite >>fast. We do similar for the LCD and get >800kHz. >>It can be envisioned to tie multiple boxes together and form a kind of >>network with it, collision detection like for ethernet. >>Jörg >> > >So fairly fast communication could be possible, it just wouldn't be any >kind of existing protocol for the low-level stuff. > >Is the RX pin the 4th pole on the headphone socket that the in-line remote >hooks up to? So there'd be two physical connections for two-way communication? > >That seems reasonable :) In fact, for an Mp3 player, it's options seem >quite wide. > >I think I'm gonna have to pick up a C book after this week's over (ICT >coursework implementation and the start of testing to be in on Thursday, >or my head). If I'm hoping to be getting to grips with networking anytime >soon, I'll have to study double-time :) > >I don't hold up much hope in myself, but a little pipedream never hurt >anyone :) > >It's interesting seeing just what is possible with the hardware to hand. I >mean, we've already got faux-greyscale movies with sound, and it was no >way designed for that :) I'd say Rockbox adds a good ~£100 to the value of >a JBR :) > >Joe Have to offer my advice on my favourite C book: Title: C/C++ Second Edition - Programmer's Reference Author: Herbert Schildt Publisher: Osbourne ISBN: 0-07-212706-6 Cost: $20 / £13 It will NOT teach you how to program - it will NOT _teach_ you how to use pointers & references (I have a great PDF (somewhere) for that) - but it IS THE best programmer's reference I have ever found. BC _______________________________________________ http://cool.haxx.se/mailman/listinfo/rockbox Received on 2004-02-11 Page template was last modified "Tue Sep 7 00:00:02 2021" The Rockbox Crew -- Privacy Policy |