raspberry Pi and 1-wire
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raspberry Pi and 1-wire
by Patryk-6
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I've been looking at the Raspberry Pi and I've found that they will also
offer an expansion board with more GPIOs. I wonder if there's some option use this board as a 1-wire master or connect some Maxim/Dallas master to it. I see that the creator Gert is active in the comments under this post. http://www.raspberrypi.org/archives/411 Maybe someone more advanced in electronics and 1-wire could ask him about it there? I see and option that there would be an uart port(ds2480b) or i2c for DS2482-800 connected directly to Pi? Or am I getting it all wrong? I also read in the comments that "This is only the first add-on board we’ll be producing, too; look out for camera expansions and some other goodies next year" And some comments from Gert "That is where the GPIO routing area is for. The Raspberry-Pi has 17 GPIO pins. The I/O extension board can take up to 25 signals. So you have to mix-and-match. All 17 GPIOs from the Raspberry-Pi come out on the long row GP0,GP4,…GP23. You have to connect those pins to whatever you want to use which are the B1..B1 MISO.. etc. pins. Most pins can be connected arbitrarily except the SPI pins. (MISO..CSnB) Also MOTA and MOTB can be connected to arbitrary GPIO pins to give you on/off. For speed control you have to connect them to the PWM pins." He also wrote that the board will be available for purchase but the assembly/soldering and buying IC will have to to be done by the user. However anyone could start selling the as kits. -- p4trykx ------------------------------------------------------------------------------ Ridiculously easy VDI. With Citrix VDI-in-a-Box, you don't need a complex infrastructure or vast IT resources to deliver seamless, secure access to virtual desktops. With this all-in-one solution, easily deploy virtual desktops for less than the cost of PCs and save 60% on VDI infrastructure costs. Try it free! http://p.sf.net/sfu/Citrix-VDIinabox _______________________________________________ Owfs-developers mailing list Owfs-developers@... https://lists.sourceforge.net/lists/listinfo/owfs-developers |
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Re: raspberry Pi and 1-wire
by Gregg Levine
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On Fri, Dec 30, 2011 at 12:44 PM, p4trykx <p4trykx@...> wrote:
> I've been looking at the Raspberry Pi and I've found that they will also > offer an expansion board with more GPIOs. I wonder if there's some option > use this board as a 1-wire master or connect some Maxim/Dallas master to > it. I see that the creator Gert is active in the comments under this post. > http://www.raspberrypi.org/archives/411 > Maybe someone more advanced in electronics and 1-wire could ask him about > it there? I see and option that there would be an uart port(ds2480b) or > i2c for DS2482-800 connected directly to Pi? Or am I getting it all wrong? > > I also read in the comments that > "This is only the first add-on board we’ll be producing, too; look out for > camera expansions and some other goodies next year" > > And some comments from Gert > "That is where the GPIO routing area is for. The Raspberry-Pi has 17 GPIO > pins. The I/O extension board can take up to 25 signals. So you have to > mix-and-match. All 17 GPIOs from the Raspberry-Pi come out on the long row > GP0,GP4,…GP23. You have to connect those pins to whatever you want to use > which are the B1..B1 MISO.. etc. pins. > Most pins can be connected arbitrarily except the SPI pins. (MISO..CSnB) > Also MOTA and MOTB can be connected to arbitrary GPIO pins to give you > on/off. For speed control you have to connect them to the PWM pins." > He also wrote that the board will be available for purchase but the > assembly/soldering and buying IC will have to to be done by the user. > However anyone could start selling the as kits. > > > -- > p4trykx > _______________________________________________ Hello! That agrees with a discussion I had with one of the people behind that project. That took place during the third and final US based Maker Faire, this past September. I am interested in one because of that reason. ----- Gregg C Levine gregg.drwho8@... "This signature fought the Time Wars, time and again." ------------------------------------------------------------------------------ Ridiculously easy VDI. With Citrix VDI-in-a-Box, you don't need a complex infrastructure or vast IT resources to deliver seamless, secure access to virtual desktops. With this all-in-one solution, easily deploy virtual desktops for less than the cost of PCs and save 60% on VDI infrastructure costs. Try it free! http://p.sf.net/sfu/Citrix-VDIinabox _______________________________________________ Owfs-developers mailing list Owfs-developers@... https://lists.sourceforge.net/lists/listinfo/owfs-developers |
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Re: raspberry Pi and 1-wire
by Sven Geggus-5
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p4trykx <p4trykx@...> wrote:
> Maybe someone more advanced in electronics and 1-wire could ask him about > it there? I see and option that there would be an uart port(ds2480b) or > i2c for DS2482-800 connected directly to Pi? Or am I getting it all wrong? If there are GPIO pins there is probably a software only solution (no Interface chip needed). AFAIK the w1 kernel driver (which is supported by owfs) already has a GPIO Mode. Sven -- "In my opinion MS is a lot better at making money than it is at making good operating systems" (Linus Torvalds, August 1997) /me is giggls@ircnet, http://sven.gegg.us/ on the Web ------------------------------------------------------------------------------ Ridiculously easy VDI. With Citrix VDI-in-a-Box, you don't need a complex infrastructure or vast IT resources to deliver seamless, secure access to virtual desktops. With this all-in-one solution, easily deploy virtual desktops for less than the cost of PCs and save 60% on VDI infrastructure costs. Try it free! http://p.sf.net/sfu/Citrix-VDIinabox _______________________________________________ Owfs-developers mailing list Owfs-developers@... https://lists.sourceforge.net/lists/listinfo/owfs-developers |
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Re: raspberry Pi and 1-wire
by Patryk-6
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Dnia 04-01-2012 o 20:45:41 Sven Geggus <lists@...>
napisał(a): > If there are GPIO pins there is probably a software only solution (no > Interface chip needed). > > AFAIK the w1 kernel driver (which is supported by owfs) already has a > GPIO Mode. Here's a post about GPIO of R-Pi http://www.raspberrypi.org/archives/384 However GPIOs will be 3.3V but there will be also i2c bus so maybe DS2482-800 can be connected along with other useful stuff like digital potentiometers. -- p4trykx ------------------------------------------------------------------------------ Ridiculously easy VDI. With Citrix VDI-in-a-Box, you don't need a complex infrastructure or vast IT resources to deliver seamless, secure access to virtual desktops. With this all-in-one solution, easily deploy virtual desktops for less than the cost of PCs and save 60% on VDI infrastructure costs. Try it free! http://p.sf.net/sfu/Citrix-VDIinabox _______________________________________________ Owfs-developers mailing list Owfs-developers@... https://lists.sourceforge.net/lists/listinfo/owfs-developers |
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Re: raspberry Pi and 1-wire
by Pascal Baerten
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I'm also looking at this nice device for using with owfs. I certainly let you know when I got a unit...
the 3.3v is not a real issue and could be solved with some basic components. (resistor and transistor.) Pascal 2012/1/4 Patryk <p4trykx@...> Dnia 04-01-2012 o 20:45:41 Sven Geggus <lists@...> -- Pascal www.brain4home.eu to subscribe, send a mail to <list-subscribe@...> ------------------------------------------------------------------------------ Ridiculously easy VDI. With Citrix VDI-in-a-Box, you don't need a complex infrastructure or vast IT resources to deliver seamless, secure access to virtual desktops. With this all-in-one solution, easily deploy virtual desktops for less than the cost of PCs and save 60% on VDI infrastructure costs. Try it free! http://p.sf.net/sfu/Citrix-VDIinabox _______________________________________________ Owfs-developers mailing list Owfs-developers@... https://lists.sourceforge.net/lists/listinfo/owfs-developers |
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Re: raspberry Pi and 1-wire
by Nick L
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On 05/01/2012 16:31, Pascal Baerten wrote:
> I'm also looking at this nice device for using with owfs. I certainly let > you know when I got a unit... > the 3.3v is not a real issue and could be solved with some basic > components. (resistor and transistor.) > > Pascal If you've got £3,500 (yes 3.5K GBP) handy then you could always stick in a bid on eBay for one, in fact, quite literally *the* number one (beta), and perhaps have it for the weekend. http://www.ebay.co.uk/itm/Raspberry-Pi-Model-B-beta-board-01-limited-series-10-/180786868894?pt=LH_DefaultDomain_3&hash=item2a17bcb29e If you're less flush with cash, then there are some others still around the 1K mark. Or wait until they come out at ~15 GBP as promised :) I thought people paying 1K EUR for a virtual spaceship drone in some online game was crazy, but we've been watching the pi listings since they went in, and these are even more insane. Nick ------------------------------------------------------------------------------ Write once. Port to many. Get the SDK and tools to simplify cross-platform app development. Create new or port existing apps to sell to consumers worldwide. Explore the Intel AppUpSM program developer opportunity. appdeveloper.intel.com/join http://p.sf.net/sfu/intel-appdev _______________________________________________ Owfs-developers mailing list Owfs-developers@... https://lists.sourceforge.net/lists/listinfo/owfs-developers |
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Re: raspberry Pi and 1-wire
by Patryk-6
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Dnia 10-01-2012 o 15:48:25 Nick <nick@...> napisał(a):
> On 05/01/2012 16:31, Pascal Baerten wrote: >> I'm also looking at this nice device for using with owfs. I certainly >> let >> you know when I got a unit... !!!They started production!!! http://www.raspberrypi.org/archives/509 Looking how many people commented I think that the first 10k batch will sell out in first day. I hope they ship to Poland. -- p4trykx ------------------------------------------------------------------------------ Ridiculously easy VDI. With Citrix VDI-in-a-Box, you don't need a complex infrastructure or vast IT resources to deliver seamless, secure access to virtual desktops. With this all-in-one solution, easily deploy virtual desktops for less than the cost of PCs and save 60% on VDI infrastructure costs. Try it free! http://p.sf.net/sfu/Citrix-VDIinabox _______________________________________________ Owfs-developers mailing list Owfs-developers@... https://lists.sourceforge.net/lists/listinfo/owfs-developers |
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Re: raspberry Pi and 1-wire
by Phil-181
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I know this is rather premature - however...
When these go on general sale, I suspect that they might be rather popular. I will be getting one, specifically for 1-wire stuff. Now, I have never (successfully) done any cross compilation. Could someone start on a HOWTO for dummies for this device - or, better yet, could we have an optimised, static binary available for download? On 11 January 2012 00:56, p4trykx <p4trykx@...> wrote: Dnia 10-01-2012 o 15:48:25 Nick <nick@...> napisał(a): ------------------------------------------------------------------------------ RSA(R) Conference 2012 Mar 27 - Feb 2 Save $400 by Jan. 27 Register now! http://p.sf.net/sfu/rsa-sfdev2dev2 _______________________________________________ Owfs-developers mailing list Owfs-developers@... https://lists.sourceforge.net/lists/listinfo/owfs-developers |
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Re: raspberry Pi and 1-wire
by Roberto Spadim
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download pre compiled binaries :) they work nice
crosscompille is better you add a virtual machine to your x86 pc, and configura a linux distro with only gcc crosscompiller this works better and execute compillation like a 'normal' compile with just ./configure --arch.... option 2012/1/12 Phil White <manx.biz@...>: > I know this is rather premature - however... > > When these go on general sale, I suspect that they might be rather popular. > I will be getting one, specifically for 1-wire stuff. > > Now, I have never (successfully) done any cross compilation. > Could someone start on a HOWTO for dummies for this device - or, better yet, > could we have an optimised, static binary available for download? > > > On 11 January 2012 00:56, p4trykx <p4trykx@...> wrote: >> >> Dnia 10-01-2012 o 15:48:25 Nick <nick@...> napisał(a): >> >> > On 05/01/2012 16:31, Pascal Baerten wrote: >> >> I'm also looking at this nice device for using with owfs. I certainly >> >> let >> you know when I got a unit... >> >> !!!They started production!!! >> >> http://www.raspberrypi.org/archives/509 >> >> Looking how many people commented I think that the first 10k batch will >> sell out in first day. >> I hope they ship to Poland. >> >> >> >> >> -- >> p4trykx >> >> >> ------------------------------------------------------------------------------ >> Ridiculously easy VDI. With Citrix VDI-in-a-Box, you don't need a complex >> infrastructure or vast IT resources to deliver seamless, secure access to >> virtual desktops. With this all-in-one solution, easily deploy virtual >> desktops for less than the cost of PCs and save 60% on VDI infrastructure >> costs. Try it free! http://p.sf.net/sfu/Citrix-VDIinabox >> _______________________________________________ >> Owfs-developers mailing list >> Owfs-developers@... >> https://lists.sourceforge.net/lists/listinfo/owfs-developers > > > > ------------------------------------------------------------------------------ > RSA(R) Conference 2012 > Mar 27 - Feb 2 > Save $400 by Jan. 27 > Register now! > http://p.sf.net/sfu/rsa-sfdev2dev2 > _______________________________________________ > Owfs-developers mailing list > Owfs-developers@... > https://lists.sourceforge.net/lists/listinfo/owfs-developers > -- Roberto Spadim Spadim Technology / SPAEmpresarial ------------------------------------------------------------------------------ RSA(R) Conference 2012 Mar 27 - Feb 2 Save $400 by Jan. 27 Register now! http://p.sf.net/sfu/rsa-sfdev2dev2 _______________________________________________ Owfs-developers mailing list Owfs-developers@... https://lists.sourceforge.net/lists/listinfo/owfs-developers |
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Re: raspberry Pi and 1-wire
by Sven Geggus-5
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Phil White <manx.biz@...> wrote:
> Now, I have never (successfully) done any cross compilation. > Could someone start on a HOWTO for dummies for this device - or, better > yet, could we have an optimised, static binary available for download? It is almost certainly possible to nativly compile owfs on the device because they intend to run full blown linux distro. As far as Debian stable is concerned I recently backported the Debian packages for x86 (64/32 bit) and armel (which I expect the raspberry Pi computer will be). Just add deb http://geggus.net/debian squeeze main to /etc/apt/sources.list Regards Sven -- Microsoft ist offenbar die einzige Firma, die in der Lage ist, ein mit Office nicht kompatibles Bürosoftwarepaket einzuführen. (Florian Weimer in de.alt.sysadmin.recovery) /me is giggls@ircnet, http://sven.gegg.us/ on the Web ------------------------------------------------------------------------------ RSA(R) Conference 2012 Mar 27 - Feb 2 Save $400 by Jan. 27 Register now! http://p.sf.net/sfu/rsa-sfdev2dev2 _______________________________________________ Owfs-developers mailing list Owfs-developers@... https://lists.sourceforge.net/lists/listinfo/owfs-developers |
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Re: raspberry Pi and 1-wire
by Roberto Spadim
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uhmmm nice
2012/1/12 Sven Geggus <lists@...>: > Phil White <manx.biz@...> wrote: > >> Now, I have never (successfully) done any cross compilation. >> Could someone start on a HOWTO for dummies for this device - or, better >> yet, could we have an optimised, static binary available for download? > > It is almost certainly possible to nativly compile owfs on the device > because they intend to run full blown linux distro. > > As far as Debian stable is concerned I recently backported the Debian > packages for x86 (64/32 bit) and armel (which I expect the raspberry Pi > computer will be). > > Just add > deb http://geggus.net/debian squeeze main > > to /etc/apt/sources.list > > Regards > > Sven > > -- > Microsoft ist offenbar die einzige Firma, die in der Lage ist, ein mit > Office nicht kompatibles Bürosoftwarepaket einzuführen. > (Florian Weimer in de.alt.sysadmin.recovery) > /me is giggls@ircnet, http://sven.gegg.us/ on the Web > > ------------------------------------------------------------------------------ > RSA(R) Conference 2012 > Mar 27 - Feb 2 > Save $400 by Jan. 27 > Register now! > http://p.sf.net/sfu/rsa-sfdev2dev2 > _______________________________________________ > Owfs-developers mailing list > Owfs-developers@... > https://lists.sourceforge.net/lists/listinfo/owfs-developers -- Roberto Spadim Spadim Technology / SPAEmpresarial ------------------------------------------------------------------------------ RSA(R) Conference 2012 Mar 27 - Feb 2 Save $400 by Jan. 27 Register now! http://p.sf.net/sfu/rsa-sfdev2dev2 _______________________________________________ Owfs-developers mailing list Owfs-developers@... https://lists.sourceforge.net/lists/listinfo/owfs-developers |
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Re: raspberry Pi and 1-wire
by Stuart Poulton-4
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I've had a go at designing a RaspberryPi 1-wire breakout board, details here
http://go.je/18v <http://go.je/18v+> Happy to take any feedback, main constraint was keeping the size smaller than 5x5cm (allows for cheaper production of prototypes) Cheers Stuart ------------------------------------------------------------------------------ Keep Your Developer Skills Current with LearnDevNow! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-d2d _______________________________________________ Owfs-developers mailing list Owfs-developers@... https://lists.sourceforge.net/lists/listinfo/owfs-developers |
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Re: raspberry Pi and 1-wire
by Roberto Spadim
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why not ds2480b+? with uart or usb-uart interface?
2012/1/18 Stuart Poulton <webworm@...>: > I've had a go at designing a RaspberryPi 1-wire breakout board, details here > > http://go.je/18v <http://go.je/18v+> > > Happy to take any feedback, main constraint was keeping the size smaller > than 5x5cm (allows for cheaper production of prototypes) > > Cheers > > Stuart > > ------------------------------------------------------------------------------ > Keep Your Developer Skills Current with LearnDevNow! > The most comprehensive online learning library for Microsoft developers > is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, > Metro Style Apps, more. Free future releases when you subscribe now! > http://p.sf.net/sfu/learndevnow-d2d > _______________________________________________ > Owfs-developers mailing list > Owfs-developers@... > https://lists.sourceforge.net/lists/listinfo/owfs-developers > -- Roberto Spadim Spadim Technology / SPAEmpresarial ------------------------------------------------------------------------------ Keep Your Developer Skills Current with LearnDevNow! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-d2d _______________________________________________ Owfs-developers mailing list Owfs-developers@... https://lists.sourceforge.net/lists/listinfo/owfs-developers |
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Re: raspberry Pi and 1-wire
by Roberto Spadim
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we could use rspberrypi as a ethernet-serial proxy, and execute owfs
at server side for example 2012/1/18 Roberto Spadim <roberto@...>: > why not ds2480b+? with uart or usb-uart interface? > > 2012/1/18 Stuart Poulton <webworm@...>: >> I've had a go at designing a RaspberryPi 1-wire breakout board, details here >> >> http://go.je/18v <http://go.je/18v+> >> >> Happy to take any feedback, main constraint was keeping the size smaller >> than 5x5cm (allows for cheaper production of prototypes) >> >> Cheers >> >> Stuart >> >> ------------------------------------------------------------------------------ >> Keep Your Developer Skills Current with LearnDevNow! >> The most comprehensive online learning library for Microsoft developers >> is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, >> Metro Style Apps, more. Free future releases when you subscribe now! >> http://p.sf.net/sfu/learndevnow-d2d >> _______________________________________________ >> Owfs-developers mailing list >> Owfs-developers@... >> https://lists.sourceforge.net/lists/listinfo/owfs-developers >> > > > > -- > Roberto Spadim > Spadim Technology / SPAEmpresarial -- Roberto Spadim Spadim Technology / SPAEmpresarial ------------------------------------------------------------------------------ Keep Your Developer Skills Current with LearnDevNow! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-d2d _______________________________________________ Owfs-developers mailing list Owfs-developers@... https://lists.sourceforge.net/lists/listinfo/owfs-developers |
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Re: raspberry Pi and 1-wire
by Sven Geggus-5
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Stuart Poulton <webworm@...> wrote:
> Happy to take any feedback Why I2C? AFAIK the w1-gpio-custom Kernel driver does provide a 1-wire Interface on any GPIO Pin which provides w1 compatible Voltage and owfs can sit on top of this. So at best we will not need any external Hardware at all. I think Raspberry Pi Board will almost certainly include a Linux GPIO subsystem compatible aproach for controlling GPIOs. Sven -- .. this message has been created using an outdated OS (UNIX-like) with an outdated mail- or newsreader (text-only) :-P /me is giggls@ircnet, http://sven.gegg.us/ on the Web ------------------------------------------------------------------------------ Keep Your Developer Skills Current with LearnDevNow! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-d2d _______________________________________________ Owfs-developers mailing list Owfs-developers@... https://lists.sourceforge.net/lists/listinfo/owfs-developers |
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Re: raspberry Pi and 1-wire
by Stuart Poulton-4
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Because I felt that i2c offered more options, and keeps the serial port
free for things that might be serial only. On 18/01/12 09:02, Roberto Spadim wrote: > why not ds2480b+? with uart or usb-uart interface? > > 2012/1/18 Stuart Poulton <webworm@...>: >> I've had a go at designing a RaspberryPi 1-wire breakout board, details here >> >> http://go.je/18v <http://go.je/18v+> >> >> Happy to take any feedback, main constraint was keeping the size smaller >> than 5x5cm (allows for cheaper production of prototypes) >> >> Cheers >> >> Stuart >> >> ------------------------------------------------------------------------------ >> Keep Your Developer Skills Current with LearnDevNow! >> The most comprehensive online learning library for Microsoft developers >> is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, >> Metro Style Apps, more. Free future releases when you subscribe now! >> http://p.sf.net/sfu/learndevnow-d2d >> _______________________________________________ >> Owfs-developers mailing list >> Owfs-developers@... >> https://lists.sourceforge.net/lists/listinfo/owfs-developers >> > > ------------------------------------------------------------------------------ Keep Your Developer Skills Current with LearnDevNow! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-d2d _______________________________________________ Owfs-developers mailing list Owfs-developers@... https://lists.sourceforge.net/lists/listinfo/owfs-developers |
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Re: raspberry Pi and 1-wire
by Stuart Poulton-4
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Not sure why you wouldn't want to have the benefits of running OWFS on
the RPi itself ? On 18/01/12 09:03, Roberto Spadim wrote: > we could use rspberrypi as a ethernet-serial proxy, and execute owfs > at server side for example > > 2012/1/18 Roberto Spadim <roberto@...>: >> why not ds2480b+? with uart or usb-uart interface? >> >> 2012/1/18 Stuart Poulton <webworm@...>: >>> I've had a go at designing a RaspberryPi 1-wire breakout board, details here >>> >>> http://go.je/18v <http://go.je/18v+> >>> >>> Happy to take any feedback, main constraint was keeping the size smaller >>> than 5x5cm (allows for cheaper production of prototypes) >>> >>> Cheers >>> >>> Stuart >>> >>> ------------------------------------------------------------------------------ >>> Keep Your Developer Skills Current with LearnDevNow! >>> The most comprehensive online learning library for Microsoft developers >>> is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, >>> Metro Style Apps, more. Free future releases when you subscribe now! >>> http://p.sf.net/sfu/learndevnow-d2d >>> _______________________________________________ >>> Owfs-developers mailing list >>> Owfs-developers@... >>> https://lists.sourceforge.net/lists/listinfo/owfs-developers >>> >> >> >> -- >> Roberto Spadim >> Spadim Technology / SPAEmpresarial > > ------------------------------------------------------------------------------ Keep Your Developer Skills Current with LearnDevNow! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-d2d _______________________________________________ Owfs-developers mailing list Owfs-developers@... https://lists.sourceforge.net/lists/listinfo/owfs-developers |
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Re: raspberry Pi and 1-wire
by Stuart Poulton-4
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Ok, firstly GPIO's on the RPi are 3v3 not 5v so not suited to longer
distance, there is no buffering or protection present. I believe that an i2c driver chip provides a more robust solution than simply bit banging a GPIO pin. Stuart On 18/01/12 09:07, Sven Geggus wrote: > Stuart Poulton <webworm@...> wrote: > >> Happy to take any feedback > Why I2C? AFAIK the w1-gpio-custom Kernel driver does provide a 1-wire > Interface on any GPIO Pin which provides w1 compatible Voltage and owfs can > sit on top of this. So at best we will not need any external Hardware at > all. I think Raspberry Pi Board will almost certainly include a Linux GPIO > subsystem compatible aproach for controlling GPIOs. > > Sven > ------------------------------------------------------------------------------ Keep Your Developer Skills Current with LearnDevNow! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-d2d _______________________________________________ Owfs-developers mailing list Owfs-developers@... https://lists.sourceforge.net/lists/listinfo/owfs-developers |
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Re: raspberry Pi and 1-wire
by Sven Geggus-5
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Stuart Poulton <webworm@...> wrote:
> Ok, firstly GPIO's on the RPi are 3v3 not 5v so not suited to longer > distance, there is no buffering or protection present. 3.3V to 5V converters are not that much of a problöem. One could even use an Optocoupler for galvanic isolation. > I believe that an i2c driver chip provides a more robust solution than > simply bit banging a GPIO pin. It probably does, but for the sake of simplicity I think that many people prefer a solution without SMD components. Sven -- The main thing to note is that when you choose open source you don't get a Windows operating system. (from http://www.dell.com/ubuntu) /me is giggls@ircnet, http://sven.gegg.us/ on the Web ------------------------------------------------------------------------------ Keep Your Developer Skills Current with LearnDevNow! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-d2d _______________________________________________ Owfs-developers mailing list Owfs-developers@... https://lists.sourceforge.net/lists/listinfo/owfs-developers |
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Re: raspberry Pi and 1-wire
by Chris Boot
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On 18/01/2012 09:07, Sven Geggus wrote:
> Stuart Poulton<webworm@...> wrote: > >> Happy to take any feedback > > Why I2C? AFAIK the w1-gpio-custom Kernel driver does provide a 1-wire > Interface on any GPIO Pin which provides w1 compatible Voltage and owfs can > sit on top of this. So at best we will not need any external Hardware at > all. I think Raspberry Pi Board will almost certainly include a Linux GPIO > subsystem compatible aproach for controlling GPIOs. GPIOs make an easy 1-wire bus, agreed, but they can't drive the 1-wire bus in such a way that it works well on long distances or unusual topologies. Take a look at http://www.maxim-ic.com/app-notes/index.mvp/id/4206 for example. HTH, Chris -- Chris Boot bootc@... Tel: 01271 414100 ------------------------------------------------------------------------------ Keep Your Developer Skills Current with LearnDevNow! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-d2d _______________________________________________ Owfs-developers mailing list Owfs-developers@... https://lists.sourceforge.net/lists/listinfo/owfs-developers |
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