Tell us about yourself!
I'm sure you already sorted this out on your own, but, for future readers, you can use the same calculation used for the ATmega1280 for the ATmega1284.
NOAA Satellite Signals with a PVC QFH Antenna and Laptop
Bicycle trailer for heavy cargo
Protein/Energy Bars (T-rex's 'grey cubes')
How to purify water in the wild with 2 water bottles.