Date: Sat, 16 May 1998 09:07:04 +0100 (BST) From: Duncan Barclay <dmlb@ragnet.demon.co.uk> To: "Matthew N. Dodd" <winter@jurai.net> Cc: freebsd-hardware@FreeBSD.ORG Subject: RE: interesting stuff Message-ID: <XFMail.980516090704.dmlb@computer.my.domain> In-Reply-To: <Pine.BSF.3.96.980515122641.17033o-100000@sasami.jurai.net>
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On 15-May-98 Matthew N. Dodd wrote: > > Computer Serial port Thermometer > http://www.spiderplant.com/hlt/index.html > > Serial/I2C LCD displays > http://www.telusplanet.net/public/matrixoc/ > > I2C FAQ > http://www.paranoia.com/%7Efilipg/HTML/LINK/ELE/F_I2C.html > > So... Anyone wanna do a generic multi I2C bus to RS-232 adapter (at least > 19.2k)? It's usually easier to do these on the parallel port (god knows how many phase locked loops I've programmed down that!). One "problem" with the I2C is that it is not a TTL compatible bus, so a bit of hardware is need to convert the logic levels. Secondly, the framing on the I2C bus doesn't lend itself well to UART style parity/start/stop bits. I would suggest that a parallel port driver be plugged into the ppbus framework. It owuld be something I would find useful at work! --- ________________________________________________________________________ Duncan Barclay | God smiles upon the little children, dmlb@ragnet.demon.co.uk | the alcoholics, and the permanently stoned. ________________________________________________________________________ To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hardware" in the body of the message
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