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2009-12-31 by Dave McLaughlin
I will fire up my compiler later and see if I can give you some pointers from the Atmel code. Dave. From: AVR-Chat@yahoogroups.com [mailto:AVR-Chat@yahoogroups.com] On Behalf Of blue_eagle74 Sent: 31 December 2009 11:30 To: AVR-Chat@yahoogroups.com Subject: [AVR-Chat] Re: 90can12
2009-12-31 by Dave McLaughlin
The CAN controller in the device needs a fair bit of work to fully understand it and also a good understanding of CAN to be able to use it fully. There is quite a bit to setup the device to make it work and it took me about 1 week with the code from the Atmel website, porting it
2009-12-31 by Jim Wagner
Overshoot can also be caused by mismatched rise and fall times in the drivers. You can also have capacitive coupling from the gate to the source and if the Vcc level of the top transistor is smaller than the driving signal, this can be quite serious. I suggest that you look at co
2009-12-31 by blue_eagle74
I am using CodeVision to compile and load the chips. I have seen many sites that describe the CAN. I have used the CV wizard to set up the CAN using only MOB1 but don't know how to start sending or recieving data or where to get the data. Brian --- In AVR-Chat@yahoogroups.com, "D
2009-12-31 by mago Umandam
OK, i'll do research on how to do that driver-load impedance matching. Thanks --- On Thu, 12/31/09, David VanHorn wrote: From: David VanHorn Subject: Re: [AVR-Chat] reducing signal overshoot/undershoot To: AVR-Chat@yahoogroups.com Date: Thursday, December 31, 2009, 10:20 AM On We
2009-12-31 by blue_eagle74
I have searched and searched but cant find what I need. Can anyone provide a simple C code in CV using the CANbus. A simple one for transmit and/or request info from the other AVR. I just want to talk to another AVR and have it respond and turn on an LED so I can see that it work
2009-12-31 by David VanHorn
On Wed, Dec 30, 2009 at 6:53 PM, tim gilbert wrote: > Mago, > You need to match your output driver to the impedance of the load. > Yup. And maybe reduce drive current. The over and undershoot is caused by reflections.
2009-12-31 by tim gilbert
Mago, You need to match your output driver to the impedance of the load. Regards, Tim Gilbert JEM Innovation Inc. 303-926-9053 (office) 303-437-4342 (cell) 720-890-8582 (fax) www.jeminnovation.com www.pdksolutions.com ----- Original Message ----- From: magzky02 To: AVR-Chat@yahoo
2009-12-31 by magzky02
Hi everyone, May get ideas on how to create clean signal or reduce overshoot/undershoot. I want to create signals with variable amplitude from 1-5V, frequency is up to 20MHz and can drive up to 200mA. I have a programmable clock generator (CDCE925 from TI)which is controlled by m
2009-12-29 by BobGardner@aol.com
Hi Donald. I also have written avr c programs to play sine waves and other 'arbitrary' waveforms from a table and usually there is plenty of cpu left to even generate samples at 2 or 3 frequencies (3 part harmony?) and arithmetically add the samples together and stuff it into the
2009-12-29 by Marc R.J. Brevoort
Hi Donald, > Please understand the basics of what you want to do, then code. > I think this may help you. > http://www.avr-asm-tutorial.net/avr_en/AVR_DAC.html Thanks for the link. Unfortunately it has little to do with my main issue, which was about how to write timer-based, int
2009-12-29 by Leon Heller
Sorry, this is the correct URL: http://webspace.webring.com/people/jl/leon_heller/minidds.html Leon
2009-12-29 by Leon Heller
----- Original Message ----- From: "Marc R.J. Brevoort" To: Sent: Tuesday, December 29, 2009 9:02 PM Subject: Re: [AVR-Chat] Re: ATtiny2313 audio- w/source > Hi Donald, > >> Please understand the basics of what you want to do, then code. >> I think this may help you. >> http://ww
2009-12-29 by Donald H
--- In AVR-Chat@yahoogroups.com, "Donald H" wrote: > > > Marc > > > > I think this may help you. > http://www.avr-asm-tutorial.net/avr_en/AVR_DAC.html > > Please understand the basics of what you want to do, then code. > > don > Oh, yea Google is your friend: http://www.google.co
2009-12-29 by Donald H
> Marc > I think this may help you. http://www.avr-asm-tutorial.net/avr_en/AVR_DAC.html Please understand the basics of what you want to do, then code. don
2009-12-28 by Marc R.J. Brevoort
On Mon, 28 Dec 2009, enkitec@gmail.com wrote: > Please verify if the clock source fuses are set up to cristal > oscillator. My fuses are (Low, Extended, High): 0xee, 0xff, 0xdf. I've come one step further as I noticed changing OCR0A *did* make a difference when I increased its va
2009-12-28 by enkitec@gmail.com
Marc R.J. Brevoort wrote: >>> Right now, I've set: >>> TCCR0B = 0 >> TCNT0 = 255 (overflow on next tick) >>> TIMSK=(1 >> > > >> For one interrupt every 1/31250Hz, I'd use: >> TCCR0A = 1 > TCCR0B = 1 > OCR0A = ((8MHz/8)/31250Hz)-1 = 32-1 >> TIMSK = 1 > TCNT0 = don't care >> > > I
2009-12-28 by Marc R.J. Brevoort
>> Right now, I've set: >> TCCR0B = 0 > TCNT0 = 255 (overflow on next tick) >> TIMSK=(1 For one interrupt every 1/31250Hz, I'd use: > TCCR0A = 1 TCCR0B = 1 OCR0A = ((8MHz/8)/31250Hz)-1 = 32-1 > TIMSK = 1 TCNT0 = don't care I assume you mean 1
2009-12-28 by enkitec@gmail.com
Marc R.J. Brevoort wrote: > I had set the prescaler to 256, assuming this would > result in a timer of 8MHz/256=31250 Hz, and set > TCNT0 to 254 (one overflow every 2 ticks, or roughly > 15625 times per second) which would give me approx. > 512 cycles to calculate the wave. > > R
2009-12-28 by Marc R.J. Brevoort
On Sun, 27 Dec 2009, Leon Heller wrote: >> I'd like to try polyphonic audio now- still using >> simple square waves. Is the 2313 simply too slow >> for the task? > I've generated sine waves using a software DDS up > to 200 kHz or so, with a 12 MHz Tiny2313. All right, that pretty
2009-12-27 by enkitec@gmail.com
Marc R.J. Brevoort wrote: > I would need about 16000 interrupts per second. > The ATtiny2313 is running at 8 MHz. Is the 2313 > simply too slow for the task? > 16000 interrupts at 8Mhz means the processor can run ~500 single cycle instructions between interrupts. Isn't that enoug
2009-12-27 by wg0z@aol.com
you'll probably have to change your approach to the problem; use the PWM channel(s) to generate your waveforms. -----Original Message----- From: Marc R.J. Brevoort To: AVR-Chat@yahoogroups.com Sent: Sun, Dec 27, 2009 7:56 am Subject: [AVR-Chat] ATtiny2313 audio Hello all, I've be
2009-12-27 by Marc R.J. Brevoort
Hello all, I've been programming the ATtiny2313 to generate monophonic, square wave beeps (you could call it 'music' with a bit of imagination). The code was based mostly around the delay function. I'd like to try polyphonic audio now- still using simple square waves. As the time
2009-12-27 by Leon Heller
----- Original Message ----- From: "Marc R.J. Brevoort" To: Sent: Sunday, December 27, 2009 2:56 PM Subject: [AVR-Chat] ATtiny2313 audio > Hello all, > > I've been programming the ATtiny2313 to generate > monophonic, square wave beeps (you could call it > 'music' with a bit of im
2009-12-27 by Dave McLaughlin
Are you looking to make a recording device or simply add voice to your application? If adding voice, check out the Text to Speech and the Silky Voice IC's from Epson. I had a demo recently at a meeting with the Epson and the quality of the S1V30341 was amazing. No need for any st
2009-12-27 by Roland Jollivet
I have used the ISD2560, ie 60seconds, back in 2003. The ISD2590 is obviously 90 seconds. I found there to be quite a bit of learning involved, depending on how you want to use it. You can address the chip directly, but you have to know where the messages are, you you do it per m
2009-12-27 by blue_eagle74
Here is a data sheet and it shows how to use it http://www.futurlec.com/Others/ISD2590.shtml Brian --- In AVR-Chat@yahoogroups.com, Muhammad Amiruddin wrote: > > is there somebody ever have experience with ISD 2590 , how many second actually the duration of the chip ? per address
2009-12-24 by Muhammad Amiruddin
is there somebody ever have experience with ISD 2590 , how many second actually the duration of the chip ? per address or full chip ? how to use it? thanks [Non-text portions of this message have been removed]
2009-12-24 by blue_eagle74
There are many ways and many reasons to format a magazine as they do. It all has to do with the target audience. Brian --- In AVR-Chat@yahoogroups.com, "ecros_technology" wrote: > > --- In AVR-Chat@yahoogroups.com, Bob Paddock wrote: > > > ... I'm going to have to dig > > through
2009-12-24 by blue_eagle74
I wasnt thinking of AVR in the name. Looking into it it seems more diffucult than thought. Thangs are looking down. Brian --- In AVR-Chat@yahoogroups.com, Bob Paddock wrote: > > On Wed, Dec 23, 2009 at 6:13 PM, blue_eagle74 wrote: > > > > > > > Didnt really want a totly online ma
2009-12-23 by Bob Paddock
On Wed, Dec 23, 2009 at 6:13 PM, blue_eagle74 wrote: > > > Didnt really want a totly online mag. there are other websites that do > that. > What will you call your AVR Magazine? Atmel spends more on lawyers than it does in documentation development, so you might find yourself fig
2009-12-23 by ecros_technology
--- In AVR-Chat@yahoogroups.com, Bob Paddock wrote: > ... I'm going to have to dig > through my archives and find > A.V.R.s name ... AVR = [A]lf-Egil Bogen [V]egard Wollan [R]ISC. See Wikipedia (and donate!) > As far as online PDF's ... It would be interesting to see how people a
2009-12-23 by blue_eagle74
Didnt really want a totly online mag. there are other websites that do that. Brian --- In AVR-Chat@yahoogroups.com, Tim McDonough wrote: > > Putting the magazine on paper, mailing it, etc. adds a lot of cost and > aggravation to your business model in my opinion. I would go with
2009-12-23 by Andrew Mathison
Dear Dave McLaughlin I get my EPE as an electronic download on or around the 15th of the month, far far cheaper.....and far far quicker if you live a long way out!! I do believe that Elektor does the same, though I have not checked.... Regards Andy -------------------------------
2009-12-23 by David Kelly
On Wed, Dec 23, 2009 at 09:22:00AM -0600, Tim McDonough wrote: > David Kelly wrote: > > On Mon, Dec 21, 2009 at 12:06:41PM -0000, leon Heller wrote: > >> Designers select a chip which gets the job done as cheaply and > >> easily as possible. In some situations it might be an AVR,
2009-12-23 by Tim McDonough
Putting the magazine on paper, mailing it, etc. adds a lot of cost and aggravation to your business model in my opinion. I would go with electronic-only to begin with and offer treeware only if there was a huge outcry from paying subscribers. I subscribe to the electronic edition
2009-12-23 by Tim McDonough
MoreOrLess wrote: > Interesting thread but back to the topic of AVR Magazine. I have > subscribed to Servo since the premiere issue. While an AVR article > shows up now and then they are few and far between. Most are for the > PIC family. If Servo don't straighten out there act a
2009-12-23 by Tim McDonough
David Kelly wrote: > On Mon, Dec 21, 2009 at 12:06:41PM -0000, leon Heller wrote: >> Designers select a chip which gets the job done as cheaply and easily >> as possible. In some situations it might be an AVR, in another it >> might be PIC, or something else. > > Only *good* desi
2009-12-23 by Dave McLaughlin
Hi Brian, I would be very interested in a subscription if the quality was good. I currently get Elektor as the only magazine subscription at present. The price would have to be right of course :o) I am based out here in Indonesia so I end up having to pay for extra on shipping bu
2009-12-23 by Dave McLaughlin
I use AVR FREAKS to get up to date information but the projects section is severely let down by the lack of actual information for most of them. Quite a lot of them have no links or actual files available, just a title. Something the admins where going to try and sort out but sad
2009-12-23 by blue_eagle74
This brings up a good point. I am think of making a first mag online as a PDF to get user feedback and quality. That way you dont lose out on money and no money is spent on printing and shipping. Time to look for sponsership, Brian --- In AVR-Chat@yahoogroups.com, "Dave McLaughli
2009-12-23 by blue_eagle74
LOL I was just informed on my spell checking. The mag will have this in place. Not that it will happen yet. Still looking into it. Brian --- In AVR-Chat@yahoogroups.com, "blue_eagle74" wrote: > > Every site has their problems. The magazing I am THINKING about doing is not to answ
2009-12-23 by blue_eagle74
Every site has their problems. The magazing I am THINKING about doing is not to answer or to correct any problems with other sites but to provide projects and info on avr's. Yes, the websites do this but it is not on paper. That is what I want. It cost money and time and that is
2009-12-23 by blue_eagle74
WOW I already have a couple of people emailing me with articals and info for the magazine. Making the first magazine may be easy but keeping up the articals and stuff may be a bit harder. So far I am working on this myself with the help of a couple giving info and website help. T
2009-12-23 by blue_eagle74
What I was looking into is putting a magazine together that included similar information that I see in the many sites I am a member of since none of them have a magazine. I would not use info from the sites but from user submission. Nothing like having something to read while you
2009-12-22 by David Kelly
On Tue, Dec 22, 2009 at 05:18:11PM -0000, ecros_technology wrote: > --- In AVR-Chat@yahoogroups.com, David Kelly wrote: > > > > And how does this differ from AVRfreaks? > > Better signal-to-noise ratio? That is a worthy goal. I rarely visit AVRfreaks but when looking for somethin
2009-12-22 by David Kelly
On Tue, Dec 22, 2009 at 04:13:38PM -0000, MoreOrLess wrote: > Start small and simple. Solicite support by asking for articles from > companies that are in the related field, Spark Fun, Pololu, Arduino, > All Electronics. Surely they have projects that could be published in > an o
2009-12-22 by ecros_technology
--- In AVR-Chat@yahoogroups.com, David Kelly wrote: > > And how does this differ from AVRfreaks? Better signal-to-noise ratio? Graham.
2009-12-22 by MoreOrLess
Start small and simple. Solicite support by asking for articles from companies that are in the related field, Spark Fun, Pololu, Arduino, All Electronics. Surely they have projects that could be published in an on-line mag to get the word out and have customers calling them up as
2009-12-22 by Donald H
--- In AVR-Chat@yahoogroups.com, "blue_eagle74" wrote: > > When I posted this thread, this is what I was looking at: > > Starting an AVR magazine. It would take alot of work. It would include anything about AVR's. Why not start simple, start a web site, like "make" that specializ