AVR Freaks

AVRfreaks.net :: RE: Cleaner - report dead/empty Projects for deletion here

Author: zbaird
Subject: RE: Cleaner
Posted: Mar 16, 2010 - 04:29 AM (GMT 1)
Topic Replies: 17

Well, this is great! It's nice to see it working.

It was my hope/intention that when the correction gets made (or rejected), the post here also gets deleted. Thus this is always just a current "to do" list, not a history of All Bad Things [tm].
_________________
Chuck Baird
What would Scooby do?
http://www.zbaird.com

General Electronics :: RE: Any less costly hot air station recommendations...

Author: bperrybap
Subject: RE: Re: RE: Any less costly hot air station recommendations.
Posted: Mar 16, 2010 - 04:12 AM (GMT 1)
Topic Replies: 9

Did you see the sparkfun writeup on using a hot skillet?
http://www.sparkfun.com/commerce/tutorial_info.php?tutorials_id=59
Kind funny but it seems to work for some things.

--- bill

AVR forum :: encapsulation and memory size

Author: anniyan_x
Subject: encapsulation and memory size
Posted: Mar 16, 2010 - 03:54 AM (GMT 1)
Topic Replies: 0

hi if write codes by encapsulating the registers definition of the registers mappings in by #define it as a macro, how does and how much does it effect the memory size example codes is as below:-

Code:

*/

#define SWITCH_TX_ON      (UCSR0B |=(1<<TXEN0))

#define SWITCH_RX_ON      (UCSR0B |=(1<<RXEN0))

#define SWITCH_TX_OFF      (UCSR0B &=~(1<<TXEN0))

#define SWITCH_RX_OFF      (UCSR0B &=~(1<<TXEN0))

#define UART_TRANSMIT_REGISTER() (UDR0)

#define UART_RECEIVE_REGISTER()    (UDR0)    

#define UART_RX_isCompleted()   (UCSR0A &(1<<RXC0)) 

#define NEW_UNREAD_DATA_AVAILABLE()

                                 (UCSR0A &(1<<RXC0)) 

#define isUART_TX_DATAREG_Empty() 

                              (!(UCSR0A &(1<<UDRE0))) 

#define isUART_RX_DATAREG_Empty()       

                              (!(UCSR0A &(1<<RXC0)))

#define   hasUART_TSR_shiftedout()(UCSR0A &(1<<TXC0))

if i define as above and write API for using eg, A UART module, does this type of implementions eats up memeory?? as from my understading the compiler would replace into the place which i used the macro, the contents of the encapsulations for eg:-

Code:

if (UART_RX_isCompleted())

   {

      // do something

   }

 //will be replaced to

if ((UCSR0A &(1<<RXC0))

   {

      // do something

   }

so it is same right to directly write or write through an encapsulation, anyway the purpose of the encapsulations is to later change the register mappings to register mapping another microcontroller if i wanted use the same API for another processor.

AVR studio 4 forum :: RE: AVR Dragon ISP Programing Error

Author: VTron21
Subject: RE: AVR Dragon ISP Programing Error
Posted: Mar 16, 2010 - 03:51 AM (GMT 1)
Topic Replies: 2

That I am aware, however if the debug wire is enable at the moment I cannot disable it because I cannot enter debug mode at all. AVR studio errors telling me the Debug wire is not enabled, and when I try to enable it it fails

AVR32 Software Tools :: RE: AVR32Studio 2.5.0 plugin problem

Author: hitchkas
Posted: Mar 16, 2010 - 03:48 AM (GMT 1)
Topic Replies: 10

JRE is 'Java Runtime Environment" by Sun Microsystems, creators of the Java language. AVR32Studio requires the Java runtime environment to run. Go to this site and download and install the latest JRE

http://www.java.com/en/download/manual.jsp

I hope this helps

Off-topic forum :: RE: Assembly or C

Author: js
Subject: RE: Re: RE: Assembly or C
Posted: Mar 16, 2010 - 03:30 AM (GMT 1)
Topic Replies: 12

..and the main in BASIC.. modules/PNphpBB2/images/smiles/icon_confused.gif" alt="Confused" border="0" />
_________________
John Samperi
Ampertronics Pty. Ltd.
www.ampertronics.com.au
* Electronic Design * Custom Products * Contract Assembly

AVR GCC forum :: RE: Keyoard

Author: Rodmcm
Subject: RE: Keyoard
Posted: Mar 16, 2010 - 03:10 AM (GMT 1)
Topic Replies: 4

Thanks for that, something else learnt.I'll rip out esc and [.

AVR forum :: RE: How fast can I switch back to output from an AD session?

Author: Kontrabass
Posted: Mar 16, 2010 - 02:53 AM (GMT 1)
Topic Replies: 5

I read that too,
The first conversion after the ADC is switched
on (ADEN in ADCSRA is set) takes 25 ADC clock cycles in order to initialize the analog circuitry.
But was not sure if they meant after each power on, or after each switching on (like programming it to be AD).
Because I wondered if the ...initialize the analog circuitry is needed each time.
Ok, that's set then.

But regarding the
the change will not go in effect until this conversion is complete
in the manual it only states this for "Analog Channel Selection Bits, Reference Selection Bits".

At least in the ADC section.

Have you tested this out yourself?

Thanks!

Off-topic forum :: RE: Adobe Acrobat - don't make the mistake I just did!

Author: stevech
Posted: Mar 16, 2010 - 02:48 AM (GMT 1)
Topic Replies: 32

clawson wrote:

Steve,

I've always used the free CutePDF for "print to PDF" and it's absolutely brilliant (IMHO):

http://www.cutepdf.com/products/cutepdf/Writer.asp

Cliff

Do I want all this baggage that comes with it?

Quote:

* Requires PS2PDF converter such as Ghostscript (recommended).
You can get the free GPL Ghostscript 8.15 here.

GNU Ghostscript is an open-source interpreter for the PostScript language and the PDF file format. It is distributed under the GNU General Public License. You may obtain the source code for GPL Ghostscript 8.15 here.

AVR forum :: RE: ADC averaging question

Author: npat_avr
Posted: Mar 16, 2010 - 02:42 AM (GMT 1)
Topic Replies: 23

@Cliff,

I will be looking at an external ADC. What are some good chips I could use for this? Will the ADC interface to the AVR (SPI,I2C,etc.) slow down my overall sample rate?

@Bob,

That is exactly what I am doing. I am using a sine wave through a signal generator. I could get a decent 10kHz sine wave. When I bumped the frequency up to 18 kHz, I start getting "random" sampling.

@JC,
I understand. I will be using an LPF. I wanted to use the XMega but that has an entire new learning curve for me.

My only doubt was if averaging could help with the random sampling and smooth out the captured sine wave.

General Electronics :: RE: Wiznet Wiz question

Author: stevech
Posted: Mar 16, 2010 - 02:39 AM (GMT 1)
Topic Replies: 16

nwrightson wrote:

Hi John,
I've interfaced to the Wiznet WIZ812MJ (W5100) and it works quite well. My two issues with it are -
1) Like many other pre made boards, it does not support POE interfacing. Part of the problem is that the RJ45 socket does not pass through the connectors.
After that, whether you want proper POE or just a 12VDC signal pass through style of thing is up to the user.

2) Too many pins. On the W5100, I only use the SPI interface, yet the WIZ812MJ has forty (40) pins.

I'm toying with the idea of making my own W5100 board.

Neil.

It does have too many pins. If you are using SPI and not parallel. I use SPI, and I think many/most do so with the '812MJ, as it's aimed at embedded systems with modest throughput needs. Even so, my SPI is at 8MHz.

I just bought another batch of '812MJs. Would have bought an SPI-oriented board if it were plug and play as is the '812MJ.

AVR GCC forum :: RE: Help! Requesting value of PINx causes huge code bloat?

Author: js
Subject: RE: Help! Requesting value of PINx causes huge code bloat?
Posted: Mar 16, 2010 - 02:29 AM (GMT 1)
Topic Replies: 3

Things like that are usually the causes of "General_Exception"...
_________________
John Samperi
Ampertronics Pty. Ltd.
www.ampertronics.com.au
* Electronic Design * Custom Products * Contract Assembly

AVR forum :: RE: Xmega DAC noisy on Xplain board

Author: DocJC
Posted: Mar 16, 2010 - 02:18 AM (GMT 1)
Topic Replies: 7

Quote:

Is there a buffer on the DAC output?

Regardless of Ossi's Extrnal buffer, the Xmega's DAC module contains an Internal Buffer.

Quote:

26.5 DAC Output model
Each DAC output channel has a driver buffer with feedback ensures that the voltage on the DAC
output pin is equal to the DACs internal voltage until the DAC output reaches its saturation voltage.
Figure 26-2 on page 319 shows the DAC output model, for details on Rchannel, refer to the
DAC characteristics in the device data sheet.

I don't see a minimal load spec at this time...

JC

Off-topic forum :: RE: Why it's good to be an engineer

Author: Geoff
Subject: Re: RE: Re: RE: Re: RE: Re: Why it
Posted: Mar 16, 2010 - 02:12 AM (GMT 1)
Topic Replies: 21

bobgardner wrote:

You apply for a rebate from the county for your solar clothes dryer.

modules/PNphpBB2/images/smiles/icon_lol.gif" alt="Laughing" border="0" />

as long as the company buys sufficient carbon credits to offset my emissions it's environmentally friendly, right?

right?

right?

modules/PNphpBB2/images/smiles/icon_razz.gif" alt="Razz" border="0" />

General Electronics :: RE: Optical pulse counting at high speed... recommend a device?

Author: General_Exception
Subject: RE: Optical pulse counting at high speed... recommend a devi
Posted: Mar 16, 2010 - 02:06 AM (GMT 1)
Topic Replies: 8

Thanks for the suggestion, but I have very limited space where this detector will go, and if I order stuff from that far away (greetings from Ireland, BTW!) I'd want to be pretty sure it'll fit (and work!)