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2006-12-13 by magzky02
usually, bypass capacitors are placed at all vcc pins of ic's and are layouted as near as posible to filter out voltage ripples...i tried to measure the ripples using digital scope and it was around 300mV...but i think my scope is not accurate since i get a 300mV ripples even whe
2006-12-10 by Don AE5K
I'm just passing this info along for your information in case you did not receive it otherwise: Digi-Key is offering the ATSTK525 at a promotional discount for a limited time. Here's an extract of some of the info: Atmel's ATSTK525 Starter Kit Promotion The ATSTK525 Starter Kit i
2006-12-10 by Jim Wagner
On Thu, 07 Dec 2006 12:36:06 -0800 Ned Konz wrote: > Reza wrote: > > > 2- In some cases, specially defining a serial port > protocol, I need > > to use state machine, rather than using multi-task > kernels. but > > defining and implementation of a state machine is a > time consum
2006-12-09 by Reza
Hi; thanks for all suggestions; - I tested proteus for one or two models, but it is not as easy as OrCAD or something to work with. if you want to use a FPGA or something in hardware model, there is no way (atleast I dont know how) to use it in model. - working with real hardware
2006-12-09 by James Ronald
Oops, the link for AVRlib is http://hubbard.engr.scu.edu/embedded/avr/avrlib/ Jim Ronald ----- Original Message ----- From: "James Ronald" To: Sent: Saturday, December 09, 2006 1:15 AM Subject: Re: [AVR-Chat] Beginner wants to Program UART in C >I suggest downloading Pascal Stang
2006-12-09 by James Ronald
I suggest downloading Pascal Stang's AVRlib. It's a pretty good AVR GCC Function Library with source, examples and it's GPL. It should work well for the ATmega8, ATmega128. >I have so far only written basic logic using "C" for a Mega8 and would > like to extend this to use of the
2006-12-08 by Jim Wagner
There is some C code example (for IAR-C, I think) in the Mega8 data sheet. Look in the section about the UART. Jim On Fri, 08 Dec 2006 07:44:59 -0000 "pjcxb" wrote: > I have so far only written basic logic using "C" for a > Mega8 and would > like to extend this to use of the UART
2006-12-08 by John Clymer
Have you checked the UART/USART section of the MCU datasheet? I just checked the ATmega88 datasheet, and it provides sample C code for all UART operations. I believe the ATmega8 datasheet provides this as well. As far as serial in general, there are many pages describing PC seria
2006-12-08 by Don Kinzer
--- In AVR-Chat@yahoogroups.com, "pjcxb" wrote: > Would someone kindly point me in the right direction to find > some introductory information and some "C" code to do this task? The best way to start is to read the USART section in the mega8 datasheet; it begins on page 133 of th
2006-12-08 by Anilal S Sambasivan
Hi all, Can I implement a USB mouse using atmels at43usb325e eval board. Do any one have idea about this? I need a advice about this Thanks, Anil ____________________________________________________________________________________ Need a quick answer? Get one in minutes from peop
2006-12-08 by pjcxb
I have so far only written basic logic using "C" for a Mega8 and would like to extend this to use of the UART for RS232 comms to external devices. Would someone kindly point me in the right direction to find some introductory information and some "C" code to do this task? With th
2006-12-08 by np np
I never test using simulations. I get stuck into the real hardware and software and debug incrementally. http://www.ckp-railways.talktalk.net/pcbcad21.htm Richard Reeves wrote: Reza: > 1- In some cases i need a software environment to test entire model as > completely as possible
2006-12-07 by Ned Konz
Reza wrote: > 2- In some cases, specially defining a serial port protocol, I need > to use state machine, rather than using multi-task kernels. but > defining and implementation of a state machine is a time consuming > task. and when you want to change any logic you may need to r
2006-12-07 by Richard Reeves
Reza: > 1- In some cases i need a software environment to test entire model as > completely as possible. I tested proteus for simulation but is is a > powerfull but bad designed program. In what way is Proteus a badly designed program? Richard --- "Sve je bilo tako tiho a nemirno
2006-12-07 by John Samperi
At 02:22 AM 8/12/2006, you wrote: >AvrStudio has no capability to >write plugins for. Well you can get a SDK for Studio from Atmel if you want to and then you can write your own plug ins. You will need to sign an NDA. Regards John Samperi *****************************************
2006-12-07 by larry barello
#3 - wrap your variable access in a cli(), sei() to prevent interrupts. Here is a fast method that also preserves the interrupt state: { char sreg = SREG; ... cli() // variable access SREG = sreg; } #4 there is a command line option to force near calls "-mshort-calls". I don't kn
2006-12-07 by David Kelly
On Thu, Dec 07, 2006 at 03:22:42PM -0000, Reza wrote: > > 3- in C when you want to access a variable in both main code and > interrupt handlers, you have to declare it as volatile to avoid > memory access optimization using registers. but if variable be of > type int, or somethin
2006-12-07 by Reza
Hi all; 1st excuse me for poor english; I'm working with AVR micros more than three years. Working in a company in Automation department. I use Code Vision AVR compiler for test perposes and WinAVR with AvrStudio 4 for final project. but there are some problems in all projects: 1
2006-12-04 by David Kelly
Normally I'd happily dive off the deep end and layout my own board but time, budget, and volume, doesn't warrant such effort for this project. Is there any off-the-shelf low cost development AVR boards with at least 16 channels of 10 bit (or more) A/D? Not ideal, but have conside
2006-12-04 by Joe Dubner
Was the problem of AVR Studio 4 hanging up on compile ever resolved and the root cause found? I've successfully installed AVR Studio 4 and WinAVR on two computers but on a third it hangs whenever a compile is started. Help, please! Thanks, Joe Lewiston, ID (USA) --- In AVR-Chat@y
2006-12-02 by David VanHorn
To all who replied, thanks. I have a copy of CV now, and I'll deal with the restrictions one way or another, thanks. [Non-text portions of this message have been removed]
2006-12-01 by David VanHorn
> > > Another angle is to install it on one PC & VNC to it from the rest. > Generally if > using this product I use an external editor & chip programmer anyway. As > long as > it can see the current project directory ( wherever it may be mapped on > the > network ) then you can c
2006-12-01 by Don Ingram
Dave VanHorn wrote: > CVAVR: Will I have problems if I want to install it on multiple > computers? I'm a one-man-show here, but I run five computers and a > laptop. Basically the idea is that I can task-swap easier by having > multiple physical benches, and of course I need to tr
2006-11-30 by Alexandre Guimarães
Hi, Dave I have seen in more than one ocasion talks about Pavel sending one more license for Notebooks. He did it to me.. I am not sure he will do for more than 2... Asking him is the best way.. He is quite reasonable... And his compiler is nice for "die hard" assembler coders li
2006-11-30 by Svenn Dahlstrøm
Hi Rod You can make your own OSD chip, like Alberto Ricci Bitti has done :-) :-) :-) http://www.riccibitti.com/designs.htm Check out Video DVM, Bingo on your TV and Slot car video cronografh... Svenn ________________________________ Fra: AVR-Chat@yahoogroups.com [mailto:AVR-Chat@
2006-11-30 by Jim Wagner
The mode you describe makes good bypass caps even more important. As the battery discharges, its output resistance increases. Adding something like 47uf across the battery allows it to charge slowly to the maximum possible voltage while the micro is in low power mode, then delive
2006-11-30 by Don Ingram
Kathy Quinlan wrote: > Dave VanHorn wrote: >> CVAVR: Will I have problems if I want to install it on multiple >> computers? I'm a one-man-show here, but I run five computers and a >> laptop. Basically the idea is that I can task-swap easier by having >> multiple physical benches,
2006-11-30 by Leon Heller
----- Original Message ----- From: "Richard Cooke" To: Sent: Thursday, November 30, 2006 12:27 AM Subject: [AVR-Chat] 3V supply - need regulator? > Hi Folks, > > I'm working on a battery powered consumer product that will use a 3V > button cell. I think we've settled on the CR203
2006-11-30 by Richard Cooke
Hi Jim, Yes, by power cycling I meant to put it into a lower power mode. I am also going to periodically go back to full speed to see if there is a signal from the IR reciever module. If there is then it's back to full power. I'm not sure I understand your comment about the need
2006-11-30 by Richard Cooke
Oops - I meant 225mAH , sorry about that. Regarding the 10 minutes of ON time. We haven't nailed the times down - 10 minutes is an estimate. We might have to throttle down to a much slower speed for 30 minutes to wait for the signal from the IR receiver module. If nothing has bee
2006-11-30 by Cat C
There was a Circuit Cellar AVR contest entry that had that. If you're lucky, complete files might be still available. Cat ----Original Message Follows---- From: "Rod" Reply-To: AVR-Chat@yahoogroups.com To: AVR-Chat@yahoogroups.com Subject: [AVR-Chat] On Screen display IC Date: Tu
2006-11-30 by Kathy Quinlan
Dave VanHorn wrote: > CVAVR: Will I have problems if I want to install it on multiple > computers? I'm a one-man-show here, but I run five computers and a > laptop. Basically the idea is that I can task-swap easier by having > multiple physical benches, and of course I need to tr
2006-11-30 by James Hatley
Hello Mr. Richard Cooke, Here is a checklist provided by our area Atmel FE Mr. Eric Feign for those doing low power work. It has some good points. It seems that there are some other areas of your design to be considered as the processor must do something and there may be other ch
2006-11-30 by Jim Wagner
Opinion without direct experience: you probably don't need an additional regulator. You will need some good bypass caps, size and value depending on the nature of the loads driven by the micro. This is because the output resistance of small batteries like this tends to be higher
2006-11-30 by David VanHorn
On 11/29/06, Richard Cooke wrote: > > Hi Folks, > > I'm working on a battery powered consumer product that will use a 3V > button cell. I think we've settled on the CR2032 which has a capacity > of 225uAH. Isn't that mAH? 1000 times more. My question to the group - can I just use
2006-11-29 by Jim Wagner
I believe that Maxim has one or more. Yes, almost all of the deices formerly out there have gone away. There should also be an 8051 derivative with on-screen display built in, but it was pretty primative. Jim On Tue, 28 Nov 2006 13:32:43 -0000 "Rod" wrote: > Hi, > Has anyone seen
2006-11-29 by Richard Cooke
Hi Folks, I'm working on a battery powered consumer product that will use a 3V button cell. I think we've settled on the CR2032 which has a capacity of 225uAH. Our circuit will use an ATtiny13 @ 1MHz along with a few other items. The total current consumption is about 2.65ma when
2006-11-29 by John Samperi
At 12:32 AM 29/11/2006, you wrote: >And yes I have checked google. BUT.. have you checked AVRFreaks? I believe someone has either asked about something simlar or has already doe it. Regards John Samperi ******************************************************** Ampertronics Pty. Lt
2006-11-29 by John Samperi
At 04:04 AM 30/11/2006, you wrote: >CVAVR: Will I have problems if I want to install it on multiple >computers? Reading the licence agreement may give you a clue, I know, I know I hate reading too :) Otherwise you may drop Codevision a line and ask. Regards John Samperi *********
2006-11-29 by Richard Reeves
> CVAVR: Will I have problems if I want to install it on multiple > computers? I'm a one-man-show here, but I run five computers and a > laptop. Basically the idea is that I can task-swap easier by having > multiple physical benches, and of course I need to travel once in a > whi
2006-11-29 by Dave VanHorn
CVAVR: Will I have problems if I want to install it on multiple computers? I'm a one-man-show here, but I run five computers and a laptop. Basically the idea is that I can task-swap easier by having multiple physical benches, and of course I need to travel once in a while. I have
2006-11-28 by Rod
Hi, Has anyone seen any code to do On Screen Display on the AVR or any other Microcontroller. Or even a current dedicated IC. As the ST5730 has gone out of production. I'm thinking teletex decoder must use one and some philips Microcontrollers (8051) had them built in for TV appl
2006-11-25 by John Samperi
At 05:56 PM 24/11/2006, you wrote: >like mine attached with this. > > what is wrong with this code. > this code is for AVRGCC Attachments don't come through on this forum, you can either post your code in the files area or ask the question on the GCC forum at avrfreaks.net Regard
2006-11-24 by Celso Monteiro
Dear Jon, Regarding protection levels at the inputs, I noticed you provided protection in typical load dump levels, 60V for 12V systems. Probably you're working in aftermarket application because OEMs would not accept these levels. Regarding input protection, maybe you could use
2006-11-24 by praveen kumar
hi, can anybody send me TWI C code without using avr library files, i.e custumed one like mine attached with this. what is wrong with this code. this code is for AVRGCC praveen pinn@cle softek,Banglore. email:praveen_cpp@yahoo.co.in --------------------------------- Find out what
2006-11-24 by praveen kumar
hello frens, In Atmegax Datasheet, there mentioned about selection b/w UBRRH n UCSRC , which share common mem address. If i try to set baud rate first by selecting UBRRH with URSEL bit 0, n after that set frame format in UCSRC with URSEL bit 1, it is not working. but, if set fram
2006-11-24 by luthjej
Thank you all kindly for your suggestions, I've made a few changes to the overall circuit layout: 1W 5.1v Zeners added to 12v digital inputs - I had considered doing this earlier, but made the assumption - without calculation - that a 1K resistor "should" provide all the input pr
2006-11-22 by Ralph Hilton
On Wed, 22 Nov 2006 12:11:00 -0800 you wrote: An LCD usually takes 4 pins for data, RS, RW and EN so PD2-7 is one pin short. I also wouldn't be happy with using PC5 as an output right next to PC4 as an ADC input. I would not use ADC4 or ADC5 as an ADC input if others are availabl
2006-11-22 by larry barello
One nice thing about the AVR is that all I/O pins have identical digital characteristics (pull-up, down, hysterisis, thresholds). So from a general I/O point of view there is no issue. Peripherals can be switched in/out and are attached to specific pins. The best way to learn abo
2006-11-22 by Ned Konz
luthjej wrote: > Hi all, > I'm new to this group, predominantly because I've always used PIC's > for control applications - but I've decided that it's time to give the > AVR a whirl; the feature list on the mega series AVR's is just too > good to pass up! :) > > For my first desi