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2004-10-30 by JChavez@soboce.com
Hi, Is it posible to use Modbus + Avr? Does anyone have some info or links about it? TIA, JAvier "joseph torelli" con fecha 30/10/2004 02:43:32 a.m. Por favor, responda a AVR-Chat@yahoogroups.com Destinatarios: CC: Asunto: RE: [AVR-Chat] Bus Distance We are developing a monoritin
2004-10-30 by joseph torelli
We are developing a monoriting system where I work. There will be 2 runs of 1000'. We are using "Mega Brain" boards from ERE http://www.ere.co.th . They have ATMega128 and (2) RS485 ports. We will connect a MegaBrain to a server via rs232 and connect to other MegaBrain's via rs48
2004-10-29 by SFDFD DFDS
a thanks i will try it. Reza wrote: --- emailbucky wrote: > > > hey guys, > > i want to create a clock that keeps the time over a > 24hr period, > below is the code i have written USING AVR GCC, > whenver the timer lies > between > 22 and 23, it should write a value to the port,
2004-10-29 by Reza
--- Chuck Hackett wrote: > I would like to transfer data some distance (100 > feet in one case, 400 feet in > another) between AVRs and I'm looking for the least > complex, least expensive way > to accomplish this. Environment: > > 1) Using facilities available on AVR processors
2004-10-29 by Jeffrey Engel
RS-485? It should go that far and still have decent bandwidth. Drivers are relatively inexpensive as well. Have you a network picked out? I've been looking at HTH's S.N.A.P. (www.hth.com). HTH, Jeff Engel --- Chuck Hackett wrote: > > I would like to transfer data some distance (1
2004-10-29 by Mike F. Schwarzer
Hi Chuck, > I was wondering about how to be sure the ends of > the bus are terminated so as to minimize > reflections. Is the best way to do this by > connecting a scope (mine is 100mhz) and driving the > line watching for reflections and adjusting the > termination for minimum r
2004-10-29 by Chuck Hackett
> From: Mike F. Schwarzer > > .... > Look at the MAX485/MAX487 RS-485 Drivers, or if you like for DualTypes. > With an RS-485 Bus, you can go up to 100M with 125kBaud, at > least that was tested be myself. > > The Protocol depends on your Software, so its also possible > to have
2004-10-29 by Chuck Hackett
> From: James Russo > > I too was going to suggest RS485. I have used the > Mavric-II boards > with great success and just finished up a project which involved using > RS485 on these units. They include all the hardware required > and come at a reasonable cost. Check them out at:
2004-10-29 by James Russo
Chuck, I too was going to suggest RS485. I have used the Mavric-II boards with great success and just finished up a project which involved using RS485 on these units. They include all the hardware required and come at a reasonable cost. Check them out at: http://www.bdmicro.com/
2004-10-29 by Mike F. Schwarzer
Hello Chuck, > I would like to transfer data some distance (100 > feet in one case, 400 feet in another) between AVRs > and I'm looking for the least complex, least > expensive way to accomplish this.... Look at the MAX485/MAX487 RS-485 Drivers, or if you like for DualTypes. With
2004-10-29 by Robert Adsett
At 01:43 PM 10/29/04 -0500, you wrote: >I would like to transfer data some distance (100 feet in one case, 400 feet in >another) between AVRs and I'm looking for the least complex, least >expensive way >to accomplish this. Environment: > >1) Using facilities available on AVR proc
2004-10-29 by Chuck Hackett
I would like to transfer data some distance (100 feet in one case, 400 feet in another) between AVRs and I'm looking for the least complex, least expensive way to accomplish this. Environment: 1) Using facilities available on AVR processors (such as UART, TWI, etc.) 2) I have cab
2004-10-29 by Dave Mucha
--- In AVR-Chat@yahoogroups.com, "alwelch93021" wrote: > > Burr-Brown/TExas Inst. has the highest resolution parts. Between > Analog Devices and TI you can find a selection of 20 to 24 bit parts > with conversion rates up to around 4000 per second. You can not get > this kind of
2004-10-29 by alwelch93021
I am using ADS1255 already and will be using ADS1256 soon. SPI mode. Al Welch --- In AVR-Chat@yahoogroups.com, G B wrote: > Hello, > > Anybody out there ever use an ADS1241 or ADS1243 with an Atmel on > the SPI bus? > > I would appreciate asking you a few questions off list. > >
2004-10-29 by alwelch93021
Burr-Brown/TExas Inst. has the highest resolution parts. Between Analog Devices and TI you can find a selection of 20 to 24 bit parts with conversion rates up to around 4000 per second. You can not get this kind of resolution with SAR parts. Be careful that you look at the correc
2004-10-28 by Ian Drennan
----- Original Message ----- From: "Graham Davies" To: Sent: Wednesday, October 27, 2004 10:50 PM Subject: [AVR-Chat] Re: The Butterfly is flying !! > > > --- In AVR-Chat@yahoogroups.com, "Ian Drennan" wrote: > > > Please can someone explain when and > > why I will need to use an
2004-10-28 by Dave Hylands
Or use this: http://www.viksoe.dk/code/gmail.htm which makes your gmail account appear to be a drive letter (I haven't used this yet myslef, but thought it looked interesting). -- Dave Hylands Vancouver, BC, Canada http://www.DaveHylands.com/ -----Original Message----- From: Clar
2004-10-28 by Dave Mucha
--- In AVR-Chat@yahoogroups.com, "Clark, Andy" wrote: > > remote backup. > > How is that? Explain, please. > > Simple, after each code rev, I email the zipped source to my gmail account, > 1GB should keep me going for a while :-) > Andy And, you can invite yourself 5 times ! 5 ma
2004-10-28 by Chuck Hackett
> From: Graham Davies > .... > Conclusion - evidence points to my assertion that the JTAGEN > fuse is programmed at the factory being correct. A JTAG OCD > interface will work with devices as Atmel deliver them. You > don't need ISP as well. No way I doubt your assertion. It make
2004-10-28 by Graham Davies
--- In AVR-Chat@yahoogroups.com, "Chuck Hackett" wrote: > ... The ATMega16 I was using was > fresh from Digikey but ... I may > have cleared the fuse. This is worth getting straight because if Atmel don't program the fuse it means you can't have a JTAG-only development setup. You
2004-10-28 by Reza
--- emailbucky wrote: > > > hey guys, > > i want to create a clock that keeps the time over a > 24hr period, > below is the code i have written USING AVR GCC, > whenver the timer lies > between > 22 and 23, it should write a value to the port, but > its not doing > this, can anyb
2004-10-28 by Graham Davies
--- In AVR-Chat@yahoogroups.com, ahmed adel farid wrote: > I need ... information/documentation > about the Delta Sigma ADC ... Yes, Google is the way to get general information. You may get better hits searching for "Sigma Delta" ADC because that is the more common ordering of t
2004-10-28 by Clark, Andy
> remote backup. > How is that? Explain, please. Simple, after each code rev, I email the zipped source to my gmail account, 1GB should keep me going for a while :-) Andy
2004-10-28 by David Jones
>>> ahmedadelfarid@yahoo.com 28/10/2004 3:44:54 pm >>> >Hi >I need good information/documentation about the Delta Sigma ADC >thanks a lot Geeze. "Delta Sigma ADC" --> Google Dave :)
2004-10-28 by ahmed adel farid
Hi I need good information/documentation about the Delta Sigma ADC thanks a lot Do you Yahoo!? Y! Messenger - Communicate in real time. Download now.
2004-10-27 by Ian Drennan
----- Original Message ----- From: "Graham Davies" To: Sent: Wednesday, October 27, 2004 3:55 PM Subject: [AVR-Chat] Re: The Butterfly is flying !! > > > --- In AVR-Chat@yahoogroups.com, "Chuck Hackett" > wrote: > > > ... JTAG ICE Cube ... STK500 and ECROS's > > Butterfly Carrier
2004-10-27 by Chuck Hackett
> From: Robert Adsett > .... > >ULP ? > > User Language Program, a scripting language built into Eagle. The world has too many TLAs (Three Letter Acronyms)! Thanks Robert ... Cheers, Chuck Hackett "Good judgment comes from experience, experience comes from bad judgment" 7.5" gaug
2004-10-27 by Chuck Hackett
> From: Graham Davies > .... > Regarding the JTAGEN fuse, it is programmed in the chips as > they come from Atmel, so the safest thing is to leave it > alone. Strange. The ATMega16 I was using was fresh from Digikey but, in my noviceness I may have cleared the fuse. But, if the f
2004-10-27 by Robert Adsett
At 02:57 PM 10/27/04 -0500, you wrote: > > From: Robert Adsett > > There was an ULP that exported an eagle schematic to a spice > > file. I don't know what the status of that is. Take a look > > in their support newsgroups and download areas. > >ULP ? User Language Program, a scr
2004-10-27 by Chuck Hackett
> From: Robert Adsett > .... > >One thing I liked about AutoTrax is the Spice circuit testing feature. > >Is there a free/low cost Spice add-on to Eagle (or will work with Eagle > >files) suitable for fairly simple digital/analog circuits? > > There was an ULP that exported an ea
2004-10-27 by Graham Davies
--- In AVR-Chat@yahoogroups.com, "Ian Drennan" wrote: > Please can someone explain when and > why I will need to use an ICE ... When and why are both the same. You will need to use 'an ICE' when/because you want to see the effect of your software on the actual hardware or when th
2004-10-27 by G B
Hello, Anybody out there ever use an ADS1241 or ADS1243 with an Atmel on the SPI bus? I would appreciate asking you a few questions off list. Thanks, Glen Bankston Microsystems Engineering
2004-10-27 by Bill Velek
Clark, Andy wrote: > > I've resisted thus far, but I'd like to get one too... > > One of the main appeals to me is the possibilities for remote backup. > AndyC How is that? Explain, please. Thanks. Bill Velek
2004-10-27 by Graham Davies
--- In AVR-Chat@yahoogroups.com, "Chuck Hackett" wrote: > ... JTAG ICE Cube ... STK500 and ECROS's > Butterfly Carrier ... couple of problems ... Thanks for this post, Chuck, this is the Internet at its best. If I do a good job I win, if I don't I lose. No hiding here! Your start
2004-10-27 by techy fellow
Hi Chuck, Thanks so much for the detailed explanations. I will order one from Graham together with the 'Butterfly Carrier board'. cheers, Davis Chuck Hackett wrote: > From: techy fellow > > Hi All, > > While looking at ECROS Technology website, I came across the, > 'JTAG-ICE for
2004-10-27 by Don Kinzer
--- In AVR-Chat@yahoogroups.com, "Don Kinzer" wrote: > [...] you can implement [a DAC] completely in software ... Below is a link to an article describing how to implement a DAC in software. The article describes how it's done in the BasicStamp. The concept can be easily implemen
2004-10-27 by Dave Mucha
--- In AVR-Chat@yahoogroups.com, "Don Kinzer" wrote: > > --- In AVR-Chat@yahoogroups.com, "Jim Wagner" > wrote: > > You don't need to mess with the ADC. The PWM is quite > > accurate and very deterministic. > > Also, if you only need the analog voltage for short periods of time >
2004-10-27 by Don Kinzer
--- In AVR-Chat@yahoogroups.com, "Jim Wagner" wrote: > You don't need to mess with the ADC. The PWM is quite > accurate and very deterministic. Also, if you only need the analog voltage for short periods of time you can implement it completely in software, sort of a pseudo-PWM, u
2004-10-26 by Lasse Madsen
Hi No AVR has DAC but what resolution do you need and at what speed (it can be done using the ADC and a PWM channel) Regards Lasse -----Original Message----- From: tfcsd [mailto:tfcsd@earthlink.net] Sent: 27. oktober 2004 01:18 To: AVR-Chat@yahoogroups.com Subject: Re: [AVR-Chat]
2004-10-26 by tfcsd
I am using an non AVR application that uses 2 dacs that go 0-5v. Does any AVR have dacs? Lasse Madsen wrote: > Hi > > >>BTW, the built-in "Precision" ref is anything but... I'm running one >>prototype board with a M128 who's 2.56V ref measures 2.783V! > > This is a common problem
2004-10-26 by Jim Wagner
You don't need to mess with the ADC. The PWM is quite accurate and very deterministic. No need to measure! It is as accurate as Vcc and the timer resolution. Jim On Wed, 27 Oct 2004 01:19:29 +0200 "Lasse Madsen" wrote: > Hi > > No AVR has DAC but what resolution do you need and a
2004-10-26 by Robert Adsett
At 04:40 PM 10/26/04 -0500, you wrote: >One thing I liked about AutoTrax is the Spice circuit testing feature. Is >there >a free/low cost Spice add-on to Eagle (or will work with Eagle files) suitable >for fairly simple digital/analog circuits? There was an ULP that exported an e
2004-10-26 by Chuck Hackett
(Another 'looking for' question ) One thing I liked about AutoTrax is the Spice circuit testing feature. Is there a free/low cost Spice add-on to Eagle (or will work with Eagle files) suitable for fairly simple digital/analog circuits? Is Multisim from Electronics Workbench (http
2004-10-26 by Chuck Hackett
Thanks to all for the replies to my search for layout software. I'm in the process of becoming familiar with Eagle. I like the fact that I can start with the freeware version and upgrade later if my needs grow without having to learn a new program. Cheers, Chuck Hackett "Good jud
2004-10-26 by Chuck Hackett
> From: techy fellow > > Hi All, > > While looking at ECROS Technology website, I came across the, > 'JTAG-ICE for Atmel AVR ATmega', and comtemplated to buy one > for my STK500. Before I part with USD 53 (ie. including > air-mail costs to Singapore), can someone be so kind to sh
2004-10-26 by Lasse Madsen
Hi >BTW, the built-in "Precision" ref is anything but... I'm running one >prototype board with a M128 who's 2.56V ref measures 2.783V! This is a common problem if you consult the datasheet you will see it specified with a large variation making it "unusable" for anything that req
2004-10-26 by Bruce Parham
> Do any of the AVRs have a programmable voltage reference? I've gone > through some of the datasheets and it doesn't look like they do. > > Mike Not that I recall but, if you have an unused timer, you can put it into PWM mode and connect its output to the AREF pin via a suitable
2004-10-26 by upand_at_them
Do any of the AVRs have a programmable voltage reference? I've gone through some of the datasheets and it doesn't look like they do. Mike
2004-10-26 by Clark, Andy
> I've resisted thus far, but I'd like to get one too... One of the main appeals to me is the possibilities for remote backup. AndyC
2004-10-26 by Mike Murphree
Clark, Andy said: > While we're still on the gmail subject, if any kind souls > Have a spare invite, I would be grateful... I've resisted thus far, but I'd like to get one too... TIA, Mike