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Topic: verification error, first mismatch (Read 631 times) previous topic - next topic

gregmcc

Jan 31, 2015, 06:58 pm Last Edit: Jan 31, 2015, 07:07 pm by GregM
I've got an arduino uno and am having intermittent errors  with errors uploading. Its always been working fine and the errors have only started today.

If I upload any of the example problems (blink, sensors etc)
If I try and upload my project I get:

avrdude: verifying ...
avrdude: verification error, first mismatch at byte 0x3beb
         0x4f != 0x95
avrdude: verification error; content mismatch
avrdude: Send: Q [51]   [20]
avrdude: Recv: . [14]
avrdude: Recv: . [10]

Could it be something in my project causing this?

Update: It seems to be size related. If my project gets around 15,500 bytes then I get this error  :smiley-sad-blue: 

gregmcc

Found the issue. Its a problem with the latest Windows 10 build 9926. A few others are experiencing the same issues.

http://answers.microsoft.com/en-us/insider/forum/insider_wintp-insider_devices/windows-10-serial-usb-problems/438de66f-7294-4c06-b4fb-89b45d005ca0?tab=question&status=AllReplies

No fix yet - I guess that's what happens when you run preview software :)

Peter_n

That is very weird, the serial-usb driver in Windows 10, causing this trouble ?

Perhaps you can try to minimize the size of the sketch as well.
Like the use of the 'F()' macro; using 'const' keyword for constants; use of PROGMEM for large tables with data; using temporary variables inside loops; use 'byte' or 'boolean' instead of 'int' where possible; having a nice code layout with functions and without repeating code; and so on.

Or try the Arduino IDE 1.5.8 BETA. I could produce smaller code.

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