MCUViewer

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MCUViewer is an open-source GUI debug tool for microcontrollers, enabling real-time viewing, logging, and manipulation of embedded variables. It also provides graphical representation of real-time SWO trace output for debugging and profiling.

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At a glance

Pricing

Open Source

Free tier

Yes

API

Skill level

Technical

About

What is MCUViewer?

MCUViewer, formerly STMViewer, is a powerful GUI debug tool designed for microcontrollers. It comprises two main modules: a Variable Viewer for real-time monitoring and manipulation of embedded variables directly from RAM via a debug interface (SWDIO/SWCLK/GND), and a Trace Viewer for graphically representing real-time SWO trace output (SWDIO/SWCLK/SWO/GND). This allows for profiling function execution times, confirming timer interrupt frequencies, and displaying high-frequency signals with minimal overhead. The tool supports STLink and JLink programmers and is compatible with Cortex M3/M4/M7/M33 cores. While the GitHub repository holds sources for the 1.1.0 release, MCUViewer is now closed-source. It offers a non-intrusive way to debug and analyze embedded applications, making it a valuable asset for developers working with microcontrollers.

Best used for

Ideal for developers who need to debug embedded applications, visualize real-time variable data, and analyze SWO trace output. Especially valuable for engineers working with microcontrollers to profile function execution times and display high-frequency signals with minimal system overhead.

Common actions

debug microcontrollers

monitor embedded variables

analyze SWO trace

profile embedded systems

visualize real-time data

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Capabilities

Key features

Real-time variable viewing
SWO trace visualization
Debug interface support
Non-intrusive debugging
Function execution profiling
High-frequency signal display

Target Audience

developer

Integrations

Not yet documented

Pricing & Plans

Open Source

Free

FAQs

What hardware is required to use MCUViewer?

To use MCUViewer, you only need an STLink or JLink programmer. These devices facilitate the connection between your computer and the microcontroller, enabling the real-time variable and trace viewing functionalities of the tool.

Does MCUViewer support all microcontrollers?

MCUViewer is designed for microcontrollers with Cortex M3/M4/M7/M33 cores, leveraging their embedded hardware trace peripherals. While it should work in most cases, some MCUs might require additional setup steps, as SWO implementation can vary.

Is MCUViewer still open-source?

No, MCUViewer is now closed-source. The GitHub repository currently hosts the source code for the 1.1.0 release, but subsequent versions are not publicly available. Users can download installers for the latest versions from the project's download page.

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