Estimado michael,

   I would like to see your code... thanks for sharing.
   I want to have the experience of reading that stuff, and playing
 with it.

   Cheers

Con fecha jueves, 13 de febrero de 2003, 15:01:17, escribis:

mb> Hello all,

mb> A couple of years ago (tempus fugit) when I was first getting into the
mb> PIC world, I wrote a Dallas one-wire/i-button search routine (in
mb> assembler) to find all the devices on a one-wire bus.  Since I didn't
mb> have any devices, I was unable to actually test the code.  Some kind
mb> soul sent me an i-button to test with, but it ended up getting tossed
mb> out, after a flood, by my wife as she thought it was a dead watch
mb> battery.  James (IIRC) posted my original untested routine to the
mb> techref site.

mb> Well, I recently got some temp sensors and decided to test out the
mb> routine.  Naturally, it didn't work.  :-(  Some Googling showed me that
mb> there are still no examples of this kind of routine for the PIC since my
mb> routine came up near the top of the search results.  This is not too
mb> surprising as it's a convoluted process that I only barely understood
mb> after writing my initial routine using the Dallas app note flow chart.
mb> After some head scratching and datasheet re-evaluation, I succeeded in
mb> getting it to work.  I only have four devices, but it finds them all
mb> fine.

mb> My program will scan the bus and find a maximum of four devices (16F84
mb> memory limits and easily changed).  It then prints the 64 bit serial
mb> number (in HEX) to a Hitachi 4*20 display.  If anyone is interested, I
mb> will offer the code up for free, non-commercial use.

mb> Michael Brown
mb> Instant Net Solutions
mb> www.KillerPCs.net

mb> "In the land of the blind, he who has one eye is king"

mb> --
mb> http://www.piclist.com hint: The PICList is archived three different
mb> ways.  See http://www.piclist.com/#archives for details.



--
Saludos,
 Pepe                            mailto:zumbita00@yahoo.es

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