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Hi all,
I work on a boot loader on ATMEGA 64 and 128 and I want
to be really sure of
what I think.
The boot fuses are only :
-
BOOTSZ for size
- BOOTRST to reset to boot section
I want to program the boot loader but I want to really control
the programming and
not programming the boot loader by itself.
I want to know how the LPM/SPM instruction is disabled when executed
from the Application section.
How can I know that I use the boot loader ?
Only the address
(the Program Counter) of instruction (for example address > 0xF000)
disables the LPM/SPM instruction ?
Because there is no fuse, flag or bit to do it ?
In
application, I can make a jump/call to the boot loader (call a programming
routine for example)
and can I use SPM/LPM instruction to program the boot
loader ?
In fact, I want to receive datas in application and program them in
boot loader. Is that possible ?
Thanks for help.
Yannick. |