Post by thread:Dallas 1990A

Mostly I hate Novices but this time, I am one..... Does anyone know something about the Dallas Touch Memory parts. It's a kind of battery-like 64-bit memory cell, with a 1-wire protocol. YES, only one wire to read the contents of this unique-serial number memory. The only problem is that the TIMING is very difficult. Can anybody help me ? Is te DS2404 interface chip something to use ??? Is PIC-BASIC to slow to programm in ?? NB a very interessting site: http://www.iButton.com/iButtons/index.html really great and the parts are very cheap, only the software...... Remko

At 01:32 PM 7/3/97 +0000, you wrote: >Mostly I hate Novices but this time, I am one..... > >Does anyone know something about the Dallas Touch Memory parts. >It's a kind of battery-like 64-bit memory cell, with a 1-wire protocol. > >YES, only one wire to read the contents of this unique-serial number memory. > >The only problem is that the TIMING is very difficult. Nop once you have the low lever functions there are no problems, in the matter of fact its very easy for PIC and not so easy for PC :) The code for Dallas 1-Wire is available, look at the common PIC pointers on the net and you find it, >Can anybody help me ? >Is te DS2404 interface chip something to use ??? no need to use any ionterface chip, on PIC and pullup (optional protection) is enough >Is PIC-BASIC to slow to programm in ?? Which one? Stamps are too slow by himself but there is a simple add on hardware for 1-wire to stamp interface. Other PIC basic variants should be fast enough. (Compilers) So MEL Basic Compiler asd FED Compiler (A pseudo compiler actually) should do it. >NB a very interessting site: http://www.iButton.com/iButtons/index.html >really great and the parts are very cheap, only the software...... > >Remko > > -- Silicon Studio Ltd. -- http://www.sistudio.com

part 0 830 bytes bye charley ps drop me a line if you experience ANY difficulties spam_OUTr.hannemaTakeThisOuTcastel.nl wrote: {Quote hidden}> > Mostly I hate Novices but this time, I am one..... > > Does anyone know something about the Dallas Touch Memory parts. > It's a kind of battery-like 64-bit memory cell, with a 1-wire protocol. > > YES, only one wire to read the contents of this unique-serial number memory. > > The only problem is that the TIMING is very difficult. > > Can anybody help me ? > Is te DS2404 interface chip something to use ??? > Is PIC-BASIC to slow to programm in ?? > > NB a very interessting site: http://www.iButton.com/iButtons/index.html > really great and the parts are very cheap, only the software...... > > Remko Attachment converted: wonderlandfive:zipped.zip (pZIP/pZIP) (0000CB54)

r.hannema@castel.nl wrote: > > Mostly I hate Novices but this time, I am one..... > > Does anyone know something about the Dallas Touch Memory parts. > It's a kind of battery-like 64-bit memory cell, with a 1-wire protocol. > > YES, only one wire to read the contents of this unique-serial number memory. > > The only problem is that the TIMING is very difficult. > > Can anybody help me ? > Is te DS2404 interface chip something to use ??? > Is PIC-BASIC to slow to programm in ?? > > NB a very interessting site: http://www.iButton.com/iButtons/index.html > really great and the parts are very cheap, only the software...... > > Remko Gday Remko, I have done a lot of work with the dallas chips on pic and hc11. The timing is straight forward and works well. You will need to do some setting and checking at 8uS intervals so basic may not be the way to go. Get hold of the "Touch Memory Standards" book from dallas, it explains is well. Regards -- Lee McLaren .....lmclarenKILLspam@spam@trumpet.com.au Comstra pty. ltd. lmclarenKILLspamcomstra.com.au 2 Kirksway place phone 03 62244488 Hobart Tasmania fax 03 62244601 Australia 7000 mobil 018 138682 'It was five hours of Boggs's "channelling". After three hours I asked him to summon up the soul of Jimi Hendrix and requested All Along the Watchtower. You know, the guy's been dead twenty years but he still hasn't lost his edge' Mulder

On Fri, 7 Mar 1997, Antti Lukats wrote: > >Does anyone know something about the Dallas Touch Memory parts. > >It's a kind of battery-like 64-bit memory cell, with a 1-wire protocol. > > > >YES, only one wire to read the contents of this unique-serial number memory. > > > >The only problem is that the TIMING is very difficult. > > Nop once you have the low lever functions there are no problems, > in the matter of fact its very easy for PIC and not so easy for PC :) I used to think so too, until I read App note #74 from Dallas. OneWire protocol can be done using the PC's serial port at 115.2k for communications and ~10k for the reset signal. See my webpage for more info. Brian --------------------------------------------------------------------------- Nexus Computing | Hardware and Software Design http://www.eskimo.com/~nexus | Motorola, Microchip and Linux solutions ---------------------------------------------------------------------------