LOADING
THE LUB
Before
you start using the LUB, you need to get all
the code into the AT45DB041B. The process is
straightforward.
First,
load the main LUB file into the AVR directly
and program the fuses to use the internal oscillator.
When the AVR resets, it will calibrate the internal
oscillator and attempt to communicate with the
PC.
Next,
use the lubloader software to load the main
LUB file into the main and backup spaces in
the AT45DB041B. The proper data is now in the
DataFlash, but there’s no way to load it from
the AT45DB041B into the ATmega88.
Now,
program the tinyloader file into the AVR directly.
Program the fuses to jump to the bootloader
at reset and the proper bootloader size. Run
the lubloader program with no arguments to check
if the system works and force the ATmega88 to
load the code from the AT45DB041B.
You
should now have a working bootloader system.
The lubloader program’s verbose outputs are
extremely useful when things aren’t working
right.
