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Rockbox mail archiveSubject: Re: Serial connection and Rockbox?Re: Serial connection and Rockbox?
From: Joseph Jones <joe_at_bumpycarrot.cjb.net>
Date: Wed, 11 Feb 2004 01:08:24 +0000 BlueChip wrote: > 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 > > Thanks buddy :) I'm always open to suggestions. Joe _______________________________________________ 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 |