AVR Freaks

Off-topic forum :: RE: Goodbye Win Xp

Author: westfw
Subject: RE: Re: RE: Re: RE: Re: RE: Goodbye Win Xp
Posted: May 21, 2013 - 04:27 PM (GMT 1)
Topic Replies: 68

So what's the fastest WXP system I could buy now (assuming I have disks and licenses available)? I'm limited to 4G of memory, right, and XP doesn't support some "new" hardware, right?

AVR forum :: RE: Question about eeprom (ATmega32)

Author: LevenEigenaar
Subject: RE: Question about eeprom (ATmega32)
Posted: May 21, 2013 - 04:26 PM (GMT 1)
Topic Replies: 2

The 2 is still the adress where "Hello word" go get written?

AVR32 Hardware :: RE: AT32UC3C2 - USART Idle low

Author: simshelloworld
Subject: RE: AT32UC3C2 - USART Idle low
Posted: May 21, 2013 - 04:25 PM (GMT 1)
Topic Replies: 1

Anyone?

AVR forum :: RE: Detecting rising/falling edge in pin change interrupt ISR

Author: mkvenkit
Subject: Re: RE: Detecting rising/falling edge in pin change interrup
Posted: May 21, 2013 - 04:21 PM (GMT 1)
Topic Replies: 3

Torby wrote:

Sure. Just read the pin. If it is high, a rising edge; else, a falling edge.

Thanks - this seems to work:

Code:

  // read PCINT0 (PB0 - pin 14):

  if(PINB & (1 << PB0)) {

    serial_write_str("rising edge\n");

  }

  else{

    serial_write_str("falling edge\n");

  }

AVR forum :: RE: Self Replicating code ...

Author: david.prentice
Subject: RE: Re: RE: Re: RE: Re: RE: Re: RE: Re: RE: Self Replicating
Posted: May 21, 2013 - 04:10 PM (GMT 1)
Topic Replies: 27

I would assume that the patterns are only going to change infrequently.
After all, the OP is reluctant to even program them once !

As always, if you write down your requirements with 'typical' figures, it helps you design the best solution.

There is a lot to be said for single-chip solutions. High-power LEDs require external driver chips. If you need more than a single-chip, extra hardware is insignificant. e.g. adding one more i.c. to a 9 i.c. pcb.

David.

AVR forum :: RE: Bus I2C atmega

Author: dbrion0606
Posted: May 21, 2013 - 04:08 PM (GMT 1)
Topic Replies: 49

Did you understand how formatted printing/encoding works?
http://www.linux-kheops.com/doc/man/man ... ntf.3.html (or, if you have GNUlinux/cygwin installled, try "man sprintf : it is the same thing for avrs as for PCs...)

AVR Studio 5 and Atmel Studio 6 forum :: RE: A bug in AtmelStudio V6.1?

Author: clawson
Posted: May 21, 2013 - 04:07 PM (GMT 1)
Topic Replies: 5

Yes but the utility that checks the .data usage in 6.1 does not know this.

There have been prior threads showing how to disable that utility - search them out!

EDIT something like this:

http://www.avrfreaks.net/index.php?name ... 467#956467
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AVR32 General (standalone) :: RE: Cluster of AVRs?

Author: gchapman
Subject: RE: Re: Cluster of AVRs?
Posted: May 21, 2013 - 03:56 PM (GMT 1)
Topic Replies: 4

The RPiCluster (YouTube) by Josh Kiepert (Boise State University).
Per one of his comments there this was used for a wireless sensor network simulation for his PhD.

AVR forum :: RE: fast tiny & mega UART bootloader EEPROM programming

Author: clawson
Subject: RE: fast tiny & mega UART bootloader EEPROM programming
Posted: May 21, 2013 - 03:55 PM (GMT 1)
Topic Replies: 1

Unless the bootloader is written to change EEPROM there's no reason it should ever get touched when the app is being replaced.
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AVR forum :: RE: Atmega32u4 with bluetooth dongle.

Author: clawson
Subject: RE: Atmega32u4 with bluetooth dongle.
Posted: May 21, 2013 - 03:49 PM (GMT 1)
Topic Replies: 1

Quote:

Now I would like to plug in a bluetooth dongle to the USB port on the 32u4 and communicate with it that way.

But the 32U4 is a "device" not a "host". You need a CPU with host facilities or at the very least OTG to be able to host something like BT. Only AT90USB647 and 1287 offer that in the AVR8 range.
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AVR Studio 5 and Atmel Studio 6 forum :: RE: New Extension - Naggy

Author: clawson
Posted: May 21, 2013 - 03:44 PM (GMT 1)
Topic Replies: 76

Senthil,

Silly question but is there any way just to temporarily turn Naggy off. Some times (if I switch target processors a few times) it seems to get confused about what the active header files are and will red line things I know to be valid.

Cliff
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General Electronics :: RE: Soft Power Button

Author: neilt6
Posted: May 21, 2013 - 03:43 PM (GMT 1)
Topic Replies: 5

JohanEkdahl wrote:

Quote:

This isn't an AVR specific question, but I'm using an ATmega32U4 so I figured you guys could help!

We have a "General Electronics" forum for exactly this purpose.

I'll signal a moderator to move this thread.

Crap! I even looked for it! Sorry... modules/PNphpBB2/images/smiles/icon_cry.gif" alt="Crying or Very sad" border="0" />

valusoft wrote:

Hi Neil,

Perhaps the thread starting with this message might help.

http://www.avrfreaks.net/index.php?name ... 083#880083

Cheers,

Ross

Thanks Ross, these circuits look interesting, but they're similar to what I have now on my 5v rig and don't solve the level shifting issue for the VBUS input. It is interesting how they were able to use 1 pin for both input and output though, I might have to copy that part...

gchapman wrote:

With some additions (level converters) the following may be considered:
Single-Pushbutton ON/OFF Power Control by Tina Alikahi (Maxim Integrated; Sep 11, 2009)
though the USB power signal would need some thought.

I've seen that chip before, but I'm trying to keep the BOM as small as possible so I won't be able to use it. I have 1N4148 diodes, P-channel MOSFETS, and N-channel MOSFETS in the design already so if I can use them I will.

AVR forum :: RE: V-USB Coding

Author: JohanEkdahl
Subject: RE: V-USB Coding
Posted: May 21, 2013 - 03:41 PM (GMT 1)
Topic Replies: 4

Quote:

Which means that unless you have a million-dollar development lab, filled with MIT and CalTech EE PhDs dedicating their careers to getting WordBozo software to actually communicate with a model-XKE BozoTron printer, and have $700,000 oscilloscopes that measure how much reflection-loss a speed-of-light electrical signal encounters when it transverses a two-inch trace of circuit board, then...
... you aren't going to be developing in the USB standard

Baloney.

Quote:

In other words, if you want a working DIY joystick to your project on an Arduino budget, then find a hardware joystick that is comprised of two potentiometers and do ADC conversions on them, and forget USB

Rubbish.

Get the Arduino (Leonardo) and the two-pot joystick. Wire them together. Install the LUFA plugin for Studio and pick the best matching HID template/example project there is (likely, it will be quite close) and adopt it to your specs. Or get a AT90USBKEY and do the same. If you have the general programming and AVR skills already, then you will not unlikely get something going on one evening.

Both the above are cards excellent for tech-proovers. If this is about serial production you can now start designng the hardware proper (using the cheapest USB-enabled AVR that fits your needs).

USB is well within reach for a hobbyist, with AVR stuff for < $100 on their bench (actually < $25 if you already have the USB cable to connect the Leonardo to your PC.)
_________________
"Some questions have no answers."[Chuck Baird]
"There comes a point where the spoon-feeding has to stop and the independent thinking has to start." [Cliff Lawson]

AVR32 General (standalone) :: RE: how to reset the atmel board using code.

Author: AgwanII
Subject: RE: how to reset the atmel board using code.
Posted: May 21, 2013 - 03:08 PM (GMT 1)
Topic Replies: 3

I use UC3A3 on my board, but it should be similar. I do:

Code:

wdt_enable(100000); // causes the AVR to reset in 1 sec

while(1);

If I want to reset to DFU bootloader I do:

Code:

flashc_erase_gp_fuse_bit(31, true);

flashc_write_gp_fuse_bit(31, true); 

wdt_enable(100000); // causes the AVR to reset in 1 sec and reboot into bootloader mode

while(1);

After reset I turn of watchdog the first thing I do:

Code:

wdt_disable();

AVR forum :: RE: The real winner of Eurovision: 11 000 ATtiny44A

Author: JohanEkdahl
Posted: May 21, 2013 - 03:07 PM (GMT 1)
Topic Replies: 8

The nagging question is: Will all those be handed in for recycling in an orderly fashion?

Of-course not all of them, so what percentage will go into ordinary waste-bins etc?

Or were they collected at the exits after the event?
_________________
"Some questions have no answers."[Chuck Baird]
"There comes a point where the spoon-feeding has to stop and the independent thinking has to start." [Cliff Lawson]