For what it's worth I was repairing voltage supply on HP DV6000 laptop and noticed that there were 2 maxim chips. At least one was in the power management area. There was also mention of 1 wire bus use.
Paul Alfille wrote: > Zapinio, I think your critique focusses on your own business. 1-wire > has a lot to offer. Further, I don't know of a system similar to OWFS > that provides a simple layer between the hardware and a consistent > interface for programming and design > > The best choice of technology depends on the specifics of the > application. It's true that long, complex or populous 1-wire runs are > not very reliable. Short runs (10s of meters) and simple topology > works remarkably well. I've had a monitoring application work for 7 > years continuously even in a damp environment with submerged sensors. > > OWFS is designed to make segmenting 1-wire into short runs easy, with > network connections to distant buses. The entire network can appear to > be one large run, if desired. > > Further, the unique addressing scheme of 1-wire and filesystem > metaphor of OWFS makes designing and modifying 1-wire far simpler than > RS485-based systems. > > On the other hand, if I were installing industrial monitoring with a > turn-key system, your design makes a lot of sense. RS485 is only the > electrical specification. You then need to layer a communication > protocol like modbus on top, then drivers for each of your sensors, > and then finally something like OWFS to expose the hardware to the > operating system. You probably have custom drivers for your sensors > and an application for running the entire system. > > My intent with OWFS was to make hardware monitoring and control as > inexpensive and flexible as software design. My target audience is > people that want to design and test novel monitoring and control > systems. I'm excited that the new slaves now appearing add interesting > capabilities and functions. > > Paul Alfille > > On Fri, Mar 5, 2010 at 4:09 PM, zapinio <[email protected] > <mailto:[email protected]>> wrote: > > > It's nearly 10 years ago I developed 1 wire slaves based both on > PIC and PSoC > from Cypress. > > > Would you be wiling to share your design? > > > Since that time I forgot about. > But I see the subject is still alive in spite of Dallas, seems to > me, is > going to go out of 1 wire step by step. > I do remember 1 wire slaves subject from 1-wire discussion list > (R.I.P.) at > Dallas (before Maxim era) and my private messages with David Smiczek > (Dallas), Chris Fox and others. > 1. I don't know these days practice but that time I was informed 1 > wire > protocol is Dallas property. > It can be used for free ONLY for slaves of Dallas origin. It is > patented and > selling of third party slaves was (is?) not accepted by Dallas/Maxim. > I wouldn't like to start lawyers discussion...only report Dallas > point of > view that time. > 2. I know about 1 wire a lot. I made hundreds of installation > (mostly food > industry) and, to tell you the true, I gave up with and turned to > RS485. > Even with iButtonlink master interface which is most advanced and > the best I > know. It work (till now) with network being ca.3 km long (divided > into > segments) and few tens of slaves. > 1-wire for professionals is definitely not an alternative. > For hobbyist...hm... > What a market is it ? > 1-wire noise immunity, reliability and so on is far behind > expectation. > It's not as cheap as you expect and if you wouldn't like to have a > network > which work depending on the moon phase just turn to other solution. > I understand you like to get a lot for few cents but on my point > of view > (producer, designer) it's the road to hell. > For my customers, to that of them for whom saving of money is the most > important factor, I always say...would you like to have a system > for few $ > per point which will be responsible for eg. meet store with few > hundreds > tons of meat ? > If yes just don't waste my time. > > regards for all > > zapinio > > > ------------------------------------------------------------------------ > > ------------------------------------------------------------------------------ > Download Intel® Parallel Studio Eval > Try the new software tools for yourself. Speed compiling, find bugs > proactively, and fine-tune applications for parallel performance. > See why Intel Parallel Studio got high marks during beta. > http://p.sf.net/sfu/intel-sw-dev > ------------------------------------------------------------------------ > > _______________________________________________ > Owfs-developers mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/owfs-developers > ------------------------------------------------------------------------------ Download Intel® Parallel Studio Eval Try the new software tools for yourself. Speed compiling, find bugs proactively, and fine-tune applications for parallel performance. See why Intel Parallel Studio got high marks during beta. http://p.sf.net/sfu/intel-sw-dev _______________________________________________ Owfs-developers mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/owfs-developers
