[Icc-avr] CRC Check of Program Memory

[Rodney Pearson]

Hello Michael -

 

I have worked on this.  I developed a bootloader for the M2560 that has
a bootstrap that does what you are trying to do.  The app note you refer
to has all the pieces, but it is not the clearest code in the world if
your plan on implementing it differently than Atmel has...I ended up
just stripping out the relevant CRC checking code (rot_word,rot_loop),
creating my own ASM routines and then called those from the C code.
This made it much more flexible for me since my CRC is pre-calculated
and stored in the last WORD of Flash...

 

 

Cheers!

 

Rodney Pearson

Software Engineer

Juniper Systems, Inc.

www.junipersys.com

 

________________________________

From: icc-avr-bounces at imagecraft.com
[mailto:icc-avr-bounces at imagecraft.com] On Behalf Of Bate, Michael
Sent: Friday, September 28, 2007 9:06 AM
To: icc-avr at imagecraft.com
Subject: [Icc-avr] CRC Check of Program Memory

 

This may have come up before; unfortunately I don't see how to search
the archives of this list.

 

I am looking for a way to validate the program memory of an AVR
Atmega168.  Atmel provides an application note (AVR236) which includes
some assembly language code, but I do not see how to combine this code
with my C program written for the ImageCraft C compiler.  There are
problems assembling this even with the assembler in AVR Studio.

 

Has anyone solved this problem already?

 

Thanks in advance.

 

----

Michael Bate

Principal Software Engineer

Integra Radionics

22 Terry Avenue

Burlington, MA 01803

Phone:  781-565-1313

Fax:    781-238-0606

E-mail: <mailto:michael.bate at integra-ls.com>                  

www.radionics.com

 

Integra Radionics, Trusted Accuracy

 

******************************

 

 

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