New Atmega chip

[Gapak]

On my Arduino Uno platform I replaced the removable original Atmega 328 P-PU by a new one I bought separately from a platform.
When I try to upload a program I get the message " not in sync". What should I do to upload my code?

[JD3]

Did the new chip come with a bootloader installed?

Where did you get the chip from.

[Gapak]

Thanks for your reply. I bought the Atmega from Digi-Key. I do not know if the bootloader is installed. What is the way to know this?
If not installed what should I do to install it?

[adafruit_support_bill]

I do not know if the bootloader is installed. What is the way to know this?

You would have to ask DigiKey that question. If the catalog description does not mention a bootloader, it probably doesn't have one.

If not installed what should I do to install it?

This is how we do it: http://www.ladyada.net/library/arduino/arduinoisp.html
Or you can buy one with a bootloader pre-installed: http://www.adafruit.com/products/123

[JD3]

I bought the arduino ISP programmer from Adafruit. Works like a champ.
http://www.adafruit.com/products/462

Assemble the kit.
Load the burner sketch onto the uno (with working ATMega328p chip installed)
Select Arduino as ISP
Install new chip into shield
select burn bootloader - DONE

The tutorial is great, shouldn't have any problems.

[Gapak]

Thanks to the responsers. I bought the ISP programmer from Adafruit. I was too novice to know that purchasing a blank Atmega 328 was not the end of the job!

[Gapak]

One step at a time! Now I have bought a Standalone AVR ISP Programmer shield kit from Adafruit, I have soldered all the pieces to the board following the Arduino Hacks instructions (burning bootloader chips using an Arduino). I am now reaching the section " Load the code": when searching the Github link shown in the instructions I get :" 404, this is not the web page you are looking for".
I am stuck here! Please let me know what I can do next.

[adafruit_support_bill]

Hang on. I'll see if I can track down the missing link.

[adafruit_support_bill]

Try again- the link has been updated.

[Gapak]

Great,thanks, I got the Githud code, uploaded it to my Arduino Uno, plugged the shield over the Arduino, inserted the blank chip, clicked "burn bootloader". Then the process stopped. The error message is:
" Expected signature for Atmega 328p is 1E950F
Double check chip, or use -F to override this check"
The red led on the shield is blinking; the yellow and green leds on the Arduino are lit.
I need to be guided again!

[JD3]

look carefully on the chip you are trying to burn.
Is it really a ATMega328P-PU or is it an ATMega328-PU

Look for the "P" after the 328. Both versions are available from digikey.

If it is the non pico power ATMega328-PU there is a work around that needs to be done.
The arduino IDE and AVR dude only recognize the "P" version of the chip.

[Gapak]

I looked at the chips I bought from Digi-Key. They are Atmega 328P-PU. Furthermore, the blank chip I received from Adafruit with the shield kit ends up with the same problem.
Thanks for bringing my attention to this detail.

[Gapak]

This message is to Adafruit concerning order/invoice # 204391. At the same time I am trying to resolve a problem with my programmer shield, I have an other one with the two Atmega bootloader-programmed chips I bought from Adafruit:
On my Arduino Uno platform I have a code which runs ok for my application. When I replace the original Atmega328P-PU by one that I bought, the code uploading does not complete. The error message is the same as when I use a blank Atmega: "not in sync".
Thanks for your help.

[adafruit_support_bill]

On my Arduino Uno platform I have a code which runs ok for my application. When I replace the original Atmega328P-PU by one that I bought, the code uploading does not complete. The error message is the same as when I use a blank Atmega: "not in sync".

Are you still selecting UNO as the board type? Board type is dependent on the bootloader, not the name printed on the board. The pre-programmed bootloader on the chips we sell is the "Adaboot" loader. It uses the same protocol as the Duemilanove bootloader, so you must select "DUEMILANOVE with ATMEGA328" in the Arduino IDE.

[Gapak]

Yes, you are right, it is written in bold in the product description! Should pay more attention! Now it works.
Thanks