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Uploading

e14 Contributor

I have a Mega2560 and have intermittent problems uploading. It is more reliable with short files but as the length grows so it becomes more unreliable. At 25k more often than not it will freeze. If I 'tempt' it with a short file then there is a greater chance that it will accept a longer one. Any ideas?

  • in reply to e14 Contributor

    That would cause big problems, you can't have two devices on one COM port without causing conflicts. try adding it to a bigger open com. see if that makes a diffrence. But if all your COM ports are taken up, I'd say it's an OS problem or you have a ton of stuff connected to your PC.

     

    Fidel.

  • in reply to fidelsalinas

    Caractacas

    I seem to recall an issue with some other programs polling the comm ports, and causing issues.

    I don't recall what it was, or how you stop it.

    This recall thing is hurting my brain, so I might be wrong....

     

    If you search on the Arduino.cc forums, you may find it.

    In theory if the Mega is plugged in, under control panel devices, it should show and be not indicating a problem.

     

    You could open Task manager and list the running processes (not applications).

    Kill each one that looks like it shouldn't be there (ipod, itunes, etc) to see what one resolves it, ... if any.

    They will start back up when you reboot, so save your work in case you need to reboot.

     

    Mark

  • in reply to mcb1

    The mystery deepens. If I reboot my computer then I find that I can change COM ports OK without being given a warning. If I then load the Arduino software and upload a sketch it's still OK. If I continue uploading until it fails, then if I go to change COM ports I now get the warning on (I believe) just about EVERY COM port. I am running no other software and have nothing else connected to my computer.