AVR Freaks

AVR forum :: RE: PWM in assembler ??

Author: JohanEkdahl
Subject: RE: PWM in assembler ??
Posted: Mar 14, 2010 - 01:33 PM (GMT 1)
Topic Replies: 6

Show us how PINE2 is defined.
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General Electronics :: RE: Automotive failures

Author: alwelch
Posted: Mar 14, 2010 - 01:26 PM (GMT 1)
Topic Replies: 81

Quote:

But the investigation of the vehicle, carried out jointly by safety officials from the National Highway Traffic Safety Administration and Toyota engineers, didn't find signs the brakes had been applied at full force at high speeds over a sustained period of time, the three people familiar with the investigation said.

The brakes were discolored and showed wear, but the pattern of friction suggested the driver had intermittently applied moderate pressure on the brakes, these people said, adding the investigation didn't find indicators of the heavy pressure described by Sikes.

AVR forum :: RE: I need a coding problem. please help me.

Author: ashokaathi
Subject: RE: Re: RE: Re: RE: I need a coding problem. please help me.
Posted: Mar 14, 2010 - 01:24 PM (GMT 1)
Topic Replies: 25

how to create a small web page in microcontroller in atmega32 chip and then winavr gcc compiler.

AVR forum :: RE: multi master RS485 with AVRs and PC using USB

Author: erveee
Posted: Mar 14, 2010 - 01:04 PM (GMT 1)
Topic Replies: 2

maybe I should add the PC runs Linux

Off-topic forum :: RE: Electronics club looking for equipment, who to contact?

Author: kherseth
Subject: RE: Electronics club looking for equipment, who to contact?
Posted: Mar 14, 2010 - 01:02 PM (GMT 1)
Topic Replies: 2

We do have some oscilloscopes and power supplies. Multimeter is on the shopping list, the club have some income, but not nearly enough to get all the bits and bobs needed. We get access to more specialised measurement equipment like spectrumanalyzers and such trough the school, same goes for PCB-production. What we really need is the developing kits to draw more members.

The club will just hold all of the kits, and members are free to use them for personal projects.

There is unfortunatly very few electronic buisnesses around here, couple of old TV-repairmen and such, but i guess if they want to get rid of equipment it`s useless anyway.

Atmel university i think is very good if you are a lecturer, my school is unfortunatly not involved in that program(yet!), but i`ll contact them.

Thanks for the tips so far modules/PNphpBB2/images/smiles/icon_smile.gif" alt="Smile" border="0" />

AVR forum :: RE: Potential problems with UART

Author: david.prentice
Subject: RE: Potential problems with UART
Posted: Mar 14, 2010 - 01:02 PM (GMT 1)
Topic Replies: 7

Personally, I can see no reason for either code to fail.

The AVR code is not going to have a problem with such trivial Timer service routines.
You must be using a crystal to achieve 16MHz. And at 9600 baud, you should not get any framing errors.

From the PC point of view, it could occasionally be busy with running other programs. But the oprating system will have plenty of buffering to keep up with RX and TX. I am fairly certain that the power-up default RS232 buffers are 256 bytes. That is a quarter of a second that is safe.

You could read the current COM buffer size. And possibly increase it to say 1k. You could keep track of the high-water level from the PC side.

The AVR is doing absolutely nothing. So I cannot see it ever missing a char. You have no busy-wait loops in ISR()'s.

David.

AVR forum :: RE: Building a RF remote control

Author: naveen24
Subject: Re: RE: Re: RE: Re: Building a RF remote control
Posted: Mar 14, 2010 - 12:59 PM (GMT 1)
Topic Replies: 12

valusoft wrote:

You have attached suitable antennas for 433MHz?

And you cannot just attach a multimeter to the antenna .... does anyone else at your university have a functioning system?

Yes Sir,

I have two 72cm telescopic antennas.
And regarding help in University, Sir, I m not currently into studies. I m preparing for GRE. But yes I attended course on Embedded and doing this for quite some time. But didnt come across this project from any mate.

Regards.

AVR GCC forum :: RE: [solved] 90pwm3b issues

Author: izuael
Subject: RE: [solved] 90pwm3b issues
Posted: Mar 14, 2010 - 12:53 PM (GMT 1)
Topic Replies: 1

turns out that by default, the output mode is active low. changing the output mode to active high solved the problem.

AVR forum :: RE: Please help me to fix up SPIEN?

Author: clawson
Subject: RE: Please help me to fix up SPIEN?
Posted: Mar 14, 2010 - 12:22 PM (GMT 1)
Topic Replies: 1

But you cannot change the state of SPIEN by ISP alone? You can only change it if you had wired things up for either high voltage or JTAG programming. If you haven't done either then you cannot have changed SPIEN. More likely you have changed fuses to expect an external clock. The joy of the STK600 is that you can easily provide this.
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AVR forum :: avrisp mkII component issue

Author: b3hzat
Subject: avrisp mkII component issue
Posted: Mar 14, 2010 - 12:20 PM (GMT 1)
Topic Replies: 0

Hello everyone,

I've a issue about avrisp programmer component. I unplugged my programmer after, plugged again but I made a mistake with directions. So, I broke a very little component but I don't know what it is mission. I mean is it capacitor or resistor and which layer may I use(which side is ground) ?

I'm not sure about all these questions. Could you please give a idea or suggestion?

Also, I attached avrisp image and marked component as below;

Cheers

Off-topic forum :: RE: A good/safe domain for personal website?

Author: svofski
Subject: RE: A good/safe domain for personal website?
Posted: Mar 14, 2010 - 12:11 PM (GMT 1)
Topic Replies: 12

Dean, certainly needs more glitter in the background and flying javascript snowflakes (stars, sparkles, splashes). Otherwise, I approve.
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AVR forum :: RE: Music on Xplain

Author: clawson
Subject: RE: Music on Xplain
Posted: Mar 14, 2010 - 12:06 PM (GMT 1)
Topic Replies: 3

Quote:

Can you suggest me one way?

http://elm-chan.org/fsw/ff/00index_e.html
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AVR forum :: RE: a problem about the ADC change of ATmega16

Author: cheng_bei
Subject: RE: Re: RE: a problem about the ADC change of ATmega16
Posted: Mar 14, 2010 - 12:05 PM (GMT 1)
Topic Replies: 13

Without the 10ms delay, the rate of delivery was very quickly. The USART software(SComAssistant.exe) on my computer could only work normally for a few minutes and then my computer went to die(no reaction).
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AVR studio 4 forum :: RE: question about the bootloader

Author: clawson
Subject: RE: question about the bootloader
Posted: Mar 14, 2010 - 11:55 AM (GMT 1)
Topic Replies: 3

Quote:

so any bootloader will work right

Not necessarily. Some have their own supporting .exe that will only run in Windows (though you *might* be able to run it in emulation on a Mac). Your best bet is to pick one that uses a "standard" protocol such as (a) just Intel .hex files sent as text, (b) AVR109/AVR911/AVROSP. The former would work with any serial terminal program, the latter with avrdude and any other program that can do AVR109 protocol. Another protocol it might use is stk500(v2)
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AVR forum :: RE: having problems programming ATMEGA128 16AU

Author: david.prentice
Subject: RE: having problems programming ATMEGA128 16AU
Posted: Mar 14, 2010 - 11:45 AM (GMT 1)
Topic Replies: 3

Well, you can make a JTAGICE-1 clone for nothing if you happen to have a mega16 in a STK500. Or any board that has a MAX232 and a RS232 DB9 socket.

But first off, I would make sure that you have the correct ISP pins connected. Then supply a 1MHz clock to the XTAL1 pin of the mega128. And try to ISP with avrdude again.

I presume you have tested your soldering with a multimeter. No shorted pins? Clean looking joints?

Of course you can also think about your "bargain". Is it too good to be true?

David.