Blinky example for Mbed OS 6.0
Blinky Mbed OS example
You can build the project with all supported Mbed OS build tools. However, this example project specifically refers to the command-line interface tool Arm Mbed CLI.
(Note: To see a rendered example you can import into the Arm Online Compiler, please see our import quick start.)
Mbed OS build tools
Mbed CLI 2
Starting with version 6.5, Mbed OS uses Mbed CLI 2. It uses Ninja as a build system, and CMake to generate the build environment and manage the build process in a compiler-independent manner. If you are working with Mbed OS version prior to 6.5 then check the section Mbed CLI 1.
1. Install Mbed CLI 2.
1. From the command-line, import the example:
mbed-tools import mbed-os-example-blinky
1. Change the current directory to where the project was imported.
Mbed CLI 1
- Install Mbed CLI 1.
- From the command-line, import the example:
mbed import mbed-os-example-blinky
- Change the current directory to where the project was imported.
main() function is the single thread in the application. It toggles the state of a digital output connected to an LED on the board.
Note: This example requires a target with RTOS support, i.e. one with
rtos declared in
targets/targets.json in mbed-os. For non-RTOS targets (usually with small memory sizes), please use mbed-os-example-blinky-baremetal instead.
Building and running
- Connect a USB cable between the USB port on the board and the host computer.
Run the following command to build the example project and program the microcontroller flash memory:
- Mbed CLI 2
bash $ mbed-tools compile -m <TARGET> -t <TOOLCHAIN> --flash
- Mbed CLI 1
bash $ mbed compile -m <TARGET> -t <TOOLCHAIN> --flash
Your PC may take a few minutes to compile your code.
The binary is located at:
* Mbed CLI 2 -
* Mbed CLI 1 -
Alternatively, you can manually copy the binary to the board, which you mount on the host computer over USB.
The LED on your target turns on and off every 500 milliseconds.
If you have problems, you can review the documentation for suggestions on what could be wrong and how to fix it.
- Mbed OS Stats API.
- Mbed OS Configuration.
- Mbed OS Serial Communication.
- Mbed OS bare metal.
- Mbed boards.
License and contributions
The software is provided under Apache-2.0 license. Contributions to this project are accepted under the same license. Please see CONTRIBUTING.md for more info.
This project contains code from other projects. The original license text is included in those source files. They must comply with our license guide.