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[on:]

Hi every one.
It might be a stupid quetsion but you know what people say. There is no stupid questions.

Anyway I can't remember which of my boards have which code on it.
I don't want to look at all my programs and guess which one is the right one and then overwrite the precious code on the board.
So is it possible to download ( decompile? ) the code from the board to the arduino software. Maybe there is a anti-Arduino that transform machine code to Human code.

Thanksssssssssssssssssssssssssssssssss

[Reply #1 on:]

You can do something like this using avrdude

avrdude -D -p m168 -c stk500 -P $port -U flash:r:$filename: -v -v -b 19200

to read the flash on your ATmega168 and write it to a file on your computer

You'll have to adjust the settings for your system

I'm not sure if there's a decompiler but you can save your .hex files and corresponding binaries and keep track of their checksums to figure out which program is loaded on a chip.

[Reply #2 on:]

avrdude -F -v -v -v -v -pm168 -cstk500v1 -P/dev/ttyUSB0 -b19200 -D -Uflash:r:program.bin:r

will write the data from the ATmega168 to program.bin on a Linux system using /dev/ttyUSB0 as the USB port at 19200bps

This was tested and seems to work

[Reply #3 on:]

I looked for a "how to install avrdude" on mac and that looks complicate. I've put the avrDude folder in my home directory and tried your command line but that didn't work. I added sudo but it gave me a warning, so I am not really sure if I should do this.

I am going to try it on linux tomorrow as it might be simpler and I don't mind messing around the linux computer as I have nothing on it.

Thank you for helping me.

[Reply #4 on:]

I am not sure about the Mac but you can easily install avrdude on most Linux systems.

On yum systems => yum install avrdude

On apt-get systems => apt-get install avrdude

This usually takes just a couple of minutes.

Ubuntu and Fedora both have avrdude and avr-gcc packages and since they offer live CDs you can install it on just about any computer with internet access without having to install the OS.

[Reply #5 on:]

Great!, I've got Ubuntu 8.4 installed so that you should pretty straight forward then.

[Reply #6 on:]

Code:

sudo su -

apt-get install avrdude

avrdude -F -v -v -v -v -pm168 -cstk500v1 -P/dev/ttyUSB0 -b19200 -D -Uflash:r:program.bin:r

should do the trick then


Ubuntu has the following packages =>

avr-libc (1:1.4.7-1) [universe]
    Standard C library for Atmel AVR development
avra (1.2.2-1) [universe]
    Assembler for Atmel AVR microcontrollers
avrdude (5.5-1) [universe]
    software for programming Atmel AVR microcontrollers
avrdude-doc (5.5-1) [universe]
    documentation for avrdude
avrp (1.0beta3-6) [universe]
    Programmer for Atmel AVR microcontrollers
avrprog (0.2.1-14) [universe]
    Programmer for Atmel AVR microcontrollers


The full list is here http://packages.ubuntu.com/hardy/allpackages

[Reply #7 on:]

I looked for a "how to install avrdude" on mac and that looks complicate.

avrdude is part of the OS X Arduino install.

--Phil.