Post by thread:Digital Data Logger needs LPT specs

Hi, Im currently designing a digital data logger to monitor up to three digital levels using a PIC. I figure that I can monitor 3 pins send the data back to a PC via the parrallel port using 8 pins + a couple for strobes etc. But Im having touble with LPT port specs. Anyone got a good no-nonse guide to reciving data on the LPT port? Im looking at EPP rather than SPP because I should be able to get 2Mb/s, but EPP uses hardware control, I need to know how to make a PIC emulate the hardware control. Cheers, Bad Boy Bubba

On Sun, Sep 19, 1999 at 10:05:46PM +1000, Bad Boy Bubba wrote: > Hi, > > Im currently designing a digital data logger to monitor up to three > digital levels using a PIC. I figure that I can monitor 3 pins send the > data back to a PC via the parrallel port using 8 pins + a couple for > strobes etc. > > But Im having touble with LPT port specs. Anyone got a good > no-nonse guide to reciving data on the LPT port? Im looking at EPP > rather than SPP because I should be able to get 2Mb/s, but EPP uses > hardware control, I need to know how to make a PIC emulate the hardware > control. What about: http://www.senet.com.au/~cpeacock ? -- Wojciech Zabolotny http://www.ise.pw.edu.pl/~wzab http://www.freedos.org Free DOS for free people!

The only real way is to pony up $70 or so for the IEEE 1284 spec from http://www.ieee.org The order form is at standards.ieee.org/catalog/orderform.pdf and the price / partnumber list is at http://standards.ieee.org/catalog/bus.html#1284.1-1997 There is a pretty complete description of the signals on the techref (see below). Just fill out the form to get access (no data about members released to anyone, period, for any reason except law enforcement), and you can add your own comments, etc... Please let me know if you have any JavaScript problems with the application form, its pretty trick and may still be slightly buggy. James Newton, webmaster http://get.to/techref (hint: you can add your own private info to the techref) spam_OUTjamesnewtonTakeThisOuTgeocities.com 1-619-652-0593 phone {Original Message removed}

> But Im having touble with LPT port specs. Anyone got a good > no-nonse guide to reciving data on the LPT port? Im looking at EPP > rather than SPP because I should be able to get 2Mb/s, but EPP uses > hardware control, I need to know how to make a PIC emulate the hardware > control. > Cheers, > Bad Boy Bubba There's some good information at http://wave.campus.luth.se/~pb/comp/standards/ -adrian