I don't have an Arduino NANO board, and I am using the Arduino IDE with the ATMEGA1284 core to build the .hex file. I think exported the .hex file and the IDE did it without any program. Then I use AVRDude with my usbtiny programmer to flash the .hex file, the one WITHOUT the optiboot loader included, directly to my ATMEGA1284P.
Here is the web site I was looking at http://www.technoblogy.com/show?....
I am not seeing the program working as intended. Of course, it could a number of issues, but I just wanted to make sure that the way I flash the .hex file to my 1284P (described above) is correct. Thank you!