Re: [avr-gcc-list] including default eeprom values in flash memory

[Dusan Ferbas]

Hi,

I am using for many years a system, I published as open source (LGPL 
like) at http://www.ethernut.de/en/documents/phat.html. Look for 
'SPIFlashFileSystem' link to a zip file.
This is a complete project, but there is a subdirectory eeparams, 
which can be extracted from it.

Common problem is, that your variables in EEPROM changes between 
firmware revisions. Idea is to assign a unique ID to each data 
structure and to place a table with these IDs, offsets and lengths at 
the beginning of EEPROM area. Default table occupies space in flash. 
However this is not suitable for uPs with limited code, I found it 
usefull, because the code supports also fw downgrade, while 
preserving variables existing in both revisions and placing default 
values for new ones.

At 11:34 21.10.2009, Michael Clift wrote:
> Hi, I am using winavr, and would like to include the default eeprom 
> values (normally output to .eep) in flash memory. I want to do this 
> so that my application can easily default the eeprom. Whats the best 
> way to do this? can it be done with a modification to the linker 
> script? or should it be done in the makefile somehow?

Dusan