Exporting to IAR Embedded Workbench

This content relates to a deprecated version of Mbed

Mbed 2 is now deprecated. For the latest version please see the Mbed OS documentation.


Please note, changing the compiler toolchain introduces many degrees of freedom in the system; these differences include the translation of C/C++ code to assembly code, the link time optimizations, differences because of the implementations of the C standard libraries, and differences based on compile and link options. It also makes it a lot harder to share code and questions with other developers, as the context needs to be shared too!

Whilst we support exporting your project and the libraries to an alternate toolchain, we cannot guarantee the same consistency as using the mbed Online Compiler. We will do our best to maintain the exported libraries, project file and makefiles, but please understand we can not cover all cases, combinations or provide support for use of these alternate tools themselves!

The IAR Embedded Workbench is one of the external offline toolchains supported by the mbed platform.

For a complete overview of the "export" feature, please refer to our general: Exporting to offline toolchains.

Update the mbed library

The support for the IAR toolchain has been added very recently (Jan 2013), if you are trying to export an old project make sure to update the mbed library to the latest build first.

To export your mbed program for use in the IAR Embedded Workbench, right-click the program in your program workspace. From the dialog, you can select the "Export To" as "IAR Systems", and the target microcontroller you wish to export for (currently, only the LPC1768 is supported):


When you choose export, a zip file containing all the files you need for the IAR Embedded Workbench will be generated. Unzip it and open the IAR Embedded Workbench workspace file (".eww"):

After building the project, the binary file (".bin"), ready to be flashed on the mbed, will be generated in the "Debug\Exe" directory:


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