AVR Freaks

AVR forum :: RE: Infra Red Tranceiver

Author: shabgard
Subject: RE: Infra Red Tranceiver
Posted: Aug 20, 2008 - 06:33 PM (GMT 5)
Topic Replies: 4

But how do you receive with that. I don't see any receiver.

AVR forum :: RE: Communication Interface between micros

Author: jayjay1974
Subject: RE: Communication Interface between micros
Posted: Aug 20, 2008 - 06:33 PM (GMT 5)
Topic Replies: 1

RS485.

How do you control when the 2313 send their data? As a RS485 is a shared medium it could happen both want to send data at the same time, and datacorruption will occur.

Better have the 8515 ask the each 2313 for data.
_________________
Positive person: The glass is half full
Negative person: The glass is half empty
An engineer: The glass is too big

AVR studio 4 forum :: RE: Direct Simulation

Author: movie_freak
Subject: RE: Re: RE: Direct Simulation
Posted: Aug 20, 2008 - 06:32 PM (GMT 5)
Topic Replies: 3

Thats gr8.. Now, i want to know...how can we use it to see the execution directly on PC..when the software is running on..the hardware..

General Electronics :: RE: Inductance with a Fluke 8060A?

Author: Plons
Subject: RE: Inductance with a Fluke 8060A?
Posted: Aug 20, 2008 - 06:30 PM (GMT 5)
Topic Replies: 3

Are you looking for an instrument, or are you willing to build one yourself ?
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A new day, a new approach ....
http://www.aplomb.nl/TechStuff/TechStuff.html

AVR forum :: RE: AVR Freaks T-Shirt

Author: sulake
Posted: Aug 20, 2008 - 06:29 PM (GMT 5)
Topic Replies: 17

...or a AVR retro T-shirt.

http://www.hotlinkfiles.com/files/1708796_wwmak/AVR1_Retro_t-shirt.jpg
http://www.spreadshirt.net/en/

General Electronics :: RE: Selecting battery model

Author: KnightsOfTheRound
Subject: RE: Selecting battery model
Posted: Aug 20, 2008 - 06:23 PM (GMT 5)
Topic Replies: 3

Thanks for your quick answers.

Sorry for my poor english...

In fact after computing again, the board at full load will need less than 80mA of current.

So if I want 10h lifetime, I need to take a battery giving more than 800mA/h.

Is that right?

AVR GCC forum :: ATmega640 -> ATmega2560

Author: andrew99
Subject: ATmega640 -> ATmega2560
Posted: Aug 20, 2008 - 06:20 PM (GMT 5)
Topic Replies: 0

Hello,

A program I am developing for the ATmega640 is going to exceed the 64K boundry and probably fill 75% of the 2560's flash when complete. When I exceed the 64K, is there anything I should be aware of? I am hoping this will be as seamless as possible. The program is being developed in AVR-GCC.

Thanks,

A
_________________
AVR Studio 4 Ver. 4.14 589
avr-gcc Ver. 4.3.0
ISIS 7
ELECTRA

AVR forum :: RE: programming at90usbkey without having to press buttons?

Author: lindi-
Subject: RE: programming at90usbkey without having to press buttons?
Posted: Aug 20, 2008 - 06:19 PM (GMT 5)
Topic Replies: 2

Good idea in principle but I'd like to avoid having to be physically near the chip at all. Even rebooting the PC does not drop the 5V usb bus voltage to zero. Also, I'm am bit uneasy about soldering anything extra to the board.

Off-topic forum :: RE: I am confused with Georgia

Author: lpapad
Subject: RE: Re: RE: Re: RE: I am confused with Georgia
Posted: Aug 20, 2008 - 06:14 PM (GMT 5)
Topic Replies: 27

Georgian President Saakashvili eats his tie on TV live (video)

http://english.pravda.ru/world/ussr/16- ... kashvili-0

That's news from BBC, re-published by Pravda.

AVR GCC forum :: RE: Packed and unpacked structures?

Author: andrew99
Subject: RE: Packed and unpacked structures?
Posted: Aug 20, 2008 - 06:11 PM (GMT 5)
Topic Replies: 2

clawson,

Thanks

A
_________________
AVR Studio 4 Ver. 4.14 589
avr-gcc Ver. 4.3.0
ISIS 7
ELECTRA

AVRfreaks Trading Post :: RE: Sell PCB

Author: daqq
Subject: RE: Re: RE: Re: Sell PCB
Posted: Aug 20, 2008 - 06:05 PM (GMT 5)
Topic Replies: 18

husdat: Yeah, we do get pissed of occasionally occasionaly, and not because of the hundreds of SPAM mails I receive daily.

Of legal action: SPAMming is illegal in some countries. Unfortunately, nowhere by decapitation. So who's the bigger criminal, arnold for voicinng an opinion, or the merry spammer? And I really don't care for the feelings of spammers.
_________________
At first they wanted to go with "Starting with ARM processors", but it was too long, so they went with "going postal".

AVR forum :: RE: 2313 indexing help

Author: jgmdesign
Posted: Aug 20, 2008 - 06:01 PM (GMT 5)
Topic Replies: 14

I am going to order one of Chuck's books. While I have been an assembler eye dee ten tee for a lot of years, I like to read, and there is always something to learn.

Jim
_________________
Just remember, the light at the end of the tunnel.....MAY BE YOU!!

Good Night

Aerosmith

AVR Tutorials :: Marry to Me or Maryy to my Money

Author: sushan520
Subject: Marry to Me or Maryy to my Money
Posted: Aug 20, 2008 - 05:57 PM (GMT 5)
Topic Replies: 0

There is a little funny story which I�d like to share with you. There were once a man fallen
into love with a woman. And one day he proposed to his lover.

M： My darling，I love you. will you marry me?(Go down on one of his knees,cup a diamond ring
with his hands )(devotion)
W: Oh, darling, I love you too. But I can�t marry you.( Be bashful,effeminacy)
M: Why don�t you marry me if you loved me? (full of grievance)
W: Because you can�t buy me a Rolex.( shouting)
M: Oh my God.( Fall in a dead faint)
(Watchinstyly apeare,the man chasing the woman and shouring � Darling, I have Rolex now.�)
The End. � http://www.Watchinstyle.com, high quality replica watch, help you to save your
marriage.

This is only a jesting which will never be happened in the actual life. NO one will refuse to
marry his darling for only one piece of brand name watch. But this story really can give us
some inspirations. In this society with the developed economic and material. Money is become
more and more important. More and more people are believed that if you have money you can make
a ghost grinding for you(money is ominipotent) and money can makes the world go round. So,
making money becoming some people�s only way of living. some even pay the price of their
health and happiness. And some even lost themselves to take the risk of criminal.

Of course, money is important,with money, we can do many thins.And we can almost do anything
if we have enough money. But there are something that can�t be bought by money.
like http://www.lowestmall.com/blog/ We all know that you can buy the best medeicine but you can�t buy your health. You can buy the
most beautiful clothes and the best makeups but you can�t buy the beauty, you can buy the
royalest wedding, but you can�t buy the true love. You can buy the most fantastic books,
but you can�t buy the wisdom. You can buy the most luxury products, but you can but the
happiness. You can buy the most expensive Omega watch, but you can�t buy the time.

As a matter of fact, health and happiness are the only true welth of your life. Health is
one thing that are very easily ignored by you. So many times, when you lost it, you will
are a billionaire, but you were suffering a cancer, and you can only live in the world for
only one month. I think nobody will like this kind of life. Just think of another kind of
situation, if you are a very rich guy, you can buy almost everything you want, but you will
full of angry and complainment and pain without any special reason. I promise it is not the
the life you want.

So always bear in mind, heatlth and happiness are the only true wealth in you life.

AVR forum :: PowerSave + LCD, current too high!

Author: Valval
Subject: PowerSave + LCD, current too high!
Posted: Aug 20, 2008 - 05:53 PM (GMT 5)
Topic Replies: 0

Hi Everyone!

I am trying to use the LCD in powerSave Mode with the internal clock (1MHz). The LCD works fine but the current is > 200uA !! I think that is much too high! Or is that normal? When I go in PowerSave mode without LCD enable, I get 0.5uA!

Does anybody already measured that current??

Details:

- ATmega169PV
- AVR Studio 4 version 4.14
- JTAGICE mkII
- The device is the only component on the print.

- I am sure that the uC is entering sleeping mode.
- Every peripheral / module are switched off!

My code:

Code:

#include <avr/io.h>

#include <avr/sleep.h>

#include <avr/wdt.h>

#include <avr/interrupt.h>

#include <avr/power.h>

int main (void)

{

   cli();        // disable all interrupt

   set_sleep_mode(SLEEP_MODE_PWR_SAVE); // Set sleep mode  

      MCUCR&=~0x10;      // Allow pull up

      ACSR|=0x80;        // Analog comparator off

     ADCSRA=0x00;       // ADC turned off

     DIDR1|=0x03;       // Digital Input disable

      //LCDCRA=0x44;       // LCD OFF, low power waveform, buffer disable

      UCSR0B=0x00;        // Disable USART receiver & transmitter

      SPCR&=~0x40;      // Disable SPI

      TCCR1B=0x00;      // Disable Timer/counter1 (no clock selected)

   TCCR2A=0x00;      // Disable Timer/counter2 (no clock selected)

   TIMSK2=0x00;

    //power_adc_enable();     

   power_adc_disable();     

   //power_spi_enable();      

   power_spi_disable();     

   //power_usart0_enable();   

   power_usart0_disable(); 

   //power_timer1_enable();  

   power_timer1_disable();  

   power_lcd_enable();      

   //power_lcd_disable();

//--------------------------------------------------------------

// Init LCD

// Choix du clock

//   ASSR|=0x10;         // Need to be 1 with External clock

   LCDCRB = 0x26;      // Internal clock, Duty 1/3, Bias 1/3, 24 seg

//   LCDCRB = 0xA6;      // External clock, Duty 1/3, Bias 1/3, 24 seg

// Frame rate du LCD

   LCDFRR=0x60;   //Internal clock (1MHz) :Frame rate=1MHz/(8*2048*1)=61,04Hz

//   LCDFRR=0x10;   //External clock:Frame rate= 32kH/(8*64)=62.5HZ

//   LCDFRR=0x10;   //Internal clock(8MHz /256) :Frame rate=(8MHz/256)/(8*64*1)=61,04Hz

// Coontrol & Status A

   LCDCRA|=0x40;   // Low power wave form

   LCDCRA|=0x04;   // Buffer disable

   LCDCRA&=~0x03;   // No output supply, no blanking

// Set contrast & voltage

   LCDCCR=0x18;      // Maximum drive time, 3.00V

   LCDCRA|=0x80;   // Enable LCD

//--------------------------------------------------------------

//Disable watchdog

     // Write logical one to WDCE and WDE

   WDTCR |= (1<<WDCE) | (1<<WDE);

   // Turn off WDT

   WDTCR = (1<<WDCE);

//--------------------------------------------------------------

// Ports

//   DDRA = 0xFF;   //LCD

   DDRB = 0x40;

//   DDRC = 0xFF;   //LCD   

//   DDRD = 0xFF;   //LCD

   DDRE = 0x00;

   DDRF = 0x00;

//   DDRG = 0x3F;   //PG5 input only (pull up always on, PG6,PG7 don't exist

//   PORTA = 0xFF;   //LCD

   PORTB = 0xBF;   // 32kHZ Off

//   PORTC = 0xFF;   //LCD

//   PORTD = 0xFF;   //LCD

   PORTE = 0xFF;

   PORTF = 0xFF;

//   PORTG = 0xFF;   //LCD

// LCD

   LCDDR0 = 0xAA;

   LCDDR1 = 0xAA;

   LCDDR2 = 0xAA;

   LCDDR3 = 0xAA;

   LCDDR5 = 0xAA;

   LCDDR6 = 0xAA;

   LCDDR7 = 0xAA;

   LCDDR8 = 0xAA;

   LCDDR10= 0xAA;

   LCDDR11= 0xAA;

   LCDDR12= 0xAA;

   LCDDR13= 0xAA;

//--------------------------------------------------------------

//Disable JTAG

    MCUCR|=0x80;

    MCUCR|=0x80;

   sleep_mode();

return 0;

}

Many many thank's in advance!

Valval

AVR forum :: False RPM

Author: mahmoud shendy
Subject: False RPM
Posted: Aug 20, 2008 - 05:52 PM (GMT 5)
Topic Replies: 0

Dear All, I have a problem in my new design. The design is simply a Universal motor Speed control that:

1- The mains supply is 110V AC, rectified using a full wave recifying bridge.
2- The rectified voltage is applied to the motor via a CMOS switching transistor.
3- The AVR (ATmega8) is switching the MOS by a frequency of about 7KHz in PWM mode.
4- The Shaft of the motor has a six magnet poles that is affecting a Hall Effect Sensor.
5- The code I write is computing the RPM of the motor..
6- When the motor is fed directly from the mains, the RPM calculated properly without any problem.
7- When the motor is switched by that chopping frequency, the readings of the RPM become hazardous with great

fluctuations.

What is causing this problem.. By the way, When I watch the Sensor Output on the Oscilloscope, I found

that without chopping, the output is clean square wave, but after applying the chopping frequency, the

sensor-square wave has a fluctuations of frequency equal to the chopping one..

Now, the problem becomes obvious, How to overcome it???

Thanx in advance... SHENDY