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How-to assemble a source code file with avr_sim
Even simpler as with gavrasm the assembler source code can be assembled
with avr_sim. The following shows how to do that.
If you have an *.asm file available, download the latest version of avr_sim
from this website. Versions for
64-bit-Windows and -Linux are provided. If you need it for another operating
system, you'll have to compile it with Lazarus from the source code. How this
is made is written in the handbook for avr_sim, which you can also download
from the above linked website.
After unpacking the executable version to a folder of your choice you start
avr_sim.exe (for Windows) or avr_sim (for Linux). You are asked then for a
folder that your assembler source codes are located in. Navigate to that
folder and click ok. Choosing the wrong folder does not cause any errors,
as long as the folder exists and is accessible with your rights.
This (or a similar window of the current avr_sim version) should show up.
In the Project menu you now click on "New from asm" or you use
the shortcut Ctrl-A. Both opens a file dialog, with which you can navigate
to your *.asm file to be assembled. This file should have either an
.include "*def.inc" entry or a .device "[AVR type]"
directive that fixes the AVR type. Otherwise avr_sim won't work. If your
file misses that, you'll have to add this line with a simple text editor
(Notepad, Notepad++, KWrite, o.ä.). Or you can add this in avr_sim's
editor, save the change and re-open the project.
If the source code uses other .include files, those have to be in the same
folder. Otherwise avr_sim will complain.
When the file is loaded for the first time, you'll be asked for a package
type. For simply assembling choose whatever you like, it does not matter.
That is how avr_sim looks like when the source code has been successfully
loaded. Now simply press "Assemble" or Strg-Z and assembling goes
on. If that is successfull, a message appears and the assembled list file
opens. If not: the error file opens and shows all errors. if you right-click
on an error entry here and you click "Go to error" the source
file opens in the line where the error occurred.
If assembling was successfull, the assembled .hex file as well as the .eep
file are in the same folder where your source code is located. These can
now be burned to the controller using the appropriate programming software.
Done. It can be made even simpler, but I think that is simple enough.
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