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Extractinig Atmel AVR8/16 .elf project

Needed software: WinAVR: can be downloaded from http://sourceforge.net/projects/winavr/files/WinAVR/

Step by step manual


STEP-01

Run command prompt






STEP-02


USE “dir” and “cd” commands to get into folder, where the project is saved

dir – shows list of files in current folder

cd <Folders_name> - will enter the desired folder

cd .. - will step out from the current folder


STEP-03


Using the command “avr-readelf -l <project_name.elf>” you can display the program headers and section's header stored in the project file.
In other words project contents, that you can extract


STEP-04


use command “avr-objcopy -O binary -j .text <project_name.elf> flash.bin”
It will create flash.bin file and extract the flash contents into it.


STEP-05


use command “avr-objcopy -O binary -j .eeprom <project_name.elf> eeprom.bin”
Creates eeprom.bin file and extract an eeprom contents into it.


STEP-06


use command “avr-readelf -x .fuse <project_name.elf>”
it will display the fuse bits setting.


STEP-07


use command “avr-readelf -x .lock <project_name.elf>”
it will display the lock bits setting.


STEP-08

Erase the whole buffer.




STEP-09

Load an EEPROM data. They will be stored at address 0.




STEP-10

Open View/Edit Buffer.




STEP-11

Move an EEPROM data to the correct address.




STEP-12

Load Flash Data. They will be stored at address 0.











Setting of “View/Edit Lock, Fuses and Calibration window” using AVRStudio
If you don't have AVRstudio, continue by clicking here



STEP-13 If you are using AVRstudio

In AVRstudio select programmer, which supports your device. Run in Disconnected Mode.




STEP-14 If you are using AVRstudio

Select your device in PP/HVSP mode.




STEP-15 If you have AVRstudio

Insert the obtained fuse settings into the corresponding places.




STEP-16 If you are using AVRstudio

The checkboxes will change according to an inserted hex values.




STEP-17 If you are using AVRstudio

Set the fuse bits according to an AVRstudio settings.




STEP-18 If you are using AVRstudio

Insert an obtained Lock setting into the corresponding place.




STEP-19 If you are using AVRstudio

You can see the desired setting and set it in pg4uw.









Setting of “View/Edit Lock, Fuses and Calibration window” using datasheet



STEP-13 If you are using datasheet

Obtain a fuse bits settings using obtained data.






STEP-14 If you are using datasheet

Implement an obtained fuse setting into pg4uw.




STEP-15 If you are using datasheet

Obtain the correct lock bits setting unsing obtained data.




STEP-16 If you are using datasheet

Set the correct lock bits setting using datasheet.




Presov, January 2012
Author: Jan Drab, Elnec



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