I am unable to help you with your present problem, however the problem you had uploading to the new processors might have been because they lacked the Arduino bootloader.
You mentioned that you have an Uno, could you state which version you have? I might be able to should be able to guide you through uploading the bootloader unto the processors but that depends on which Uno you have and the level of functionality you have with your present processor.
Checked Troubleshooting guide regarding comments above that lack of "bootloader" may be reason for "not in synch" message. Guide states;
"Bootloader
Make sure there's a bootloader burned on your Arduino board. To check, reset the board. The built-in L LED (which is connected to pin 13) should blink. If it doesn't, there may not be a bootloader on your board. "
When I press Reset the L LED flash approx 3 time in one second. Then flashes on/off every second. Based on Guide statement It appears that bootloader is present on board.
ChilliTronix, decided to break down the program into components and upload each component to see what part of overall program, if any, was causing error.....
avrdude: stk500_getsync(): not in sync: resp=0x00
Deleted code for everything except what was needed for portion of code I was testing. Did this two times and uploaded remaining code.....uploads were successful. Decided to try original complete program, which included servo code. For whatever reason, it uploaded without error. Have changed programs and uploaded multiple times....works every time. Not sure what changed. Glad it's working, just don't know why.
Is there a reference guide for error codes and messages........
e.g. what does "evrdude" mean. Likewise, what does stk500_getsynch() mean. ETC.......
Were you ever able to burn a sketch to your Uno using the present computer?
Answer: When you say "burn" do you mean upload....if so, the answer is use. I'm now able to upload the problem sketch, per the last post. Not sure what I did to get it working.
If the answer to the above is yes, can you detail what was done leading up to the error.
Answer: Had downloaded to simpler sketches without issue. Tried to upload a more complicated example sketch from the Website.....that is when error "avrdude: stk500_getsync(): not in sync: resp=0x00" appeared.
Turning the power on and trying to upload my latest scetch (uploading that same scetch worked with my former CPU) I get the error message of "Not in sync".
Internal LED (connected to pin 13) immediatelly got lit as I powered it up.
Hitting the Reset-button does not make it blink, it just stays lit.
According to above there is thus no bootloader burned, right?
Thank you for your advise!
Best regards, Roger
PS
I will now try to burn a bootloader into the CPU. I am sceptical of how to do that but will try on my own before I might be back asking questions about it.
While I now understand that I more or less need an ISP to program bootloader and that my UNO CPU supplier supplies CPUs without bootloader, I have decided to simply buy a new Arduino UNO R3 instead.
Best regards, Roger
PS
How do I enable e-mail notification?
