.. zephyr:code-sample:: debugmon
:name: Debug Monitor
Configure the Debug Monitor feature on a Cortex-M processor.
Overview
********
The Debug Monitor sample shows a basic configuration of debug monitor feature.
The source code shows how to:
#. Configure registers to enable degugging in debug monitor mode
#. Specify custom interrupt to be executed when entering a breakpoint
.. _debugmon-sample-requirements:
Requirements
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Your board must:
#. Support Debug Monitor feature (available on Cortex-M processors with the exception of Cortex-M0)
#. Have an LED connected via a GPIO pin (these are called "User LEDs" on many of
Zephyr's :ref:`boards`).
#. Have the LED configured using the ``led0`` devicetree alias.
Building and Running
********************
Build and flash Debug Monitor as follows, changing ``reel_board`` for your board:
.. zephyr-app-commands::
:zephyr-app: samples/subsys/debug/debugmon
:board: reel_board
:goals: build flash
:compact:
After flashing the board enters a breakpoint and executes debug monitor exception code.
The LED starts to blink, indicating that even though the processor spins in debug monitor
interrupt, other higher priority interrupts continue to execute.
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