I have just put my Ardupilot Mega (ATMega2560) and now I am attempting to upload the firmware. I have tried to use mission planner 1.1.22 and when i select arducopter for quad it comes up with an error saying " Failed to download new firmware:System.IO.IOException:The port "COM18" does not exist."
I have also tried arduino and it has given me errors when trying to compile saying "AP_int16" does not name a type
Could someone PLEASE help!? I just want to fly my quad and everything just seems to not work so far.
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After Try to compile again.