Practical Tips for Keil: How to Output BIN Files

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Author | strongerHuang

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Some friends are curious, why does Keil only have the hex output option, but no bin output option?

This article explains: How to output bin files using Keil

Using Keil’s built-in fromelf conversion tool

The method here is actually very simple, it is implemented through Keil’s built-in tool (fromelf).

We just need to add a command in the User options after compilation:

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

After adding this command, after compilation, you will see the bin file in the output path (folder):

Explain the meaning of the command

C:\Keil_v5\ARM\ARMCLANG\bin\fromelf.exe

Represents: the path of the tool (fromelf.exe)

–bin –output

Represents: output bin file format

./Objects/Demo.bin

Represents: output bin file path

./Objects/Demo.axf

Represents: axf file path

Note: The axf format file is a file generated by the ARM compiler, which contains hex and debugging information.

For more explanations about axf files, you can refer to the article:Is there a big difference between the three file formats: bin, hex, and axf?

The meaning of this command is: Use (fromelf.exe) this tool to convert the axf file into a bin file.

If it is the default installation path:

C:\Keil_v5\ARM\ARMCLANG\bin\fromelf.exe

Then the command can be simplified like this:

fromelf –bin –output=./Objects/Demo.bin ./Objects/Demo.axf

This command has detailed explanations from the official side, if you want to know more, you can check the official website.

Official website address:

https://developer.arm.com/documentation/dui0477/latest/fromelf-command-line-options/–bin

Finally, I recorded a video, you can refer to it:

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