How to Convert AXF to BIN Using fromelf in Keil MDK

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Previously, we discussed bin, hex, axf, and elf file formats, where axf is also considered an executable program file, but it has more debugging information compared to bin and hex.

Keil MDK does not generate bin files by default. If a bin file is needed, it can be converted from axf using the fromelf tool.

In IAR, the project configuration has an option to choose between bin or hex, Project -> Options -> Output Converter:

1. Determine the location (directory) of the fromelf tool

Keil MDK V4 version is located at: C:\Keil/ARM/BIN40

Keil MDK V5 version is located at: C:\Keil_v5\ARM\ARMCLANG\bin

If you modified the path during installation, you will need to use the corresponding path.

2. Configure Keil Project Options

Project -> Options for Target -> User -> After Build/Rebuild add the command:

C:\Keil_v5\ARM\ARMCLANG\bin\fromelf.exe --bin --output  ./Objects/Demo.bin ./Objects/Demo.axf

Where:

• C:\Keil_v5: is your corresponding installation path (tool path);

• Objects: is the input/output location;

3. Format Description

The basic format is:

fromelf [options] output_file input_file

Where:

• [options]: option words

• output_file: output file

• input_file: input file

Combining the example above, you will find:

• Option words: –bin –output

• Output file: ./Objects/Demo.bin

• Input file: ./Objects/Demo.axf

You may see different implementations, for example:

C:\Keil_v5\ARM\ARMCLANG\bin\fromelf.exe --bin -o  ./Objects/Demo.bin ./Objects/Demo.axf
C:\Keil_v5\ARM\ARMCLANG\bin\fromelf.exe --bin --output=./Objects/Demo.bin ./Objects/Demo.axf

https://www.keil.com/support/man/docs/armutil/armutil_pge1362128885938.htm

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