Implementing J-Link RTT for ARM Microcontroller Debugging
By
kristianp
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Summary
This article explains how to implement J-Link RTT (Real-Time Transfer) for bidirectional logging over SWD on ARM microcontrollers, providing a practical alternative to traditional debugging methods like printf debugging or pin toggling. The author demonstrates how to use semihosting on any ARM CPU with minimal code, making advanced debugging accessible even on inexpensive microcontrollers.
Key quotes
· 4 pulledYou can use semihosting on any ARM CPU to send and receive data in a few lines of code.
In 99% of cases however, most people resort to either firing up a debugger or logging to a console (aka. printf debugging).
The first thing I do whenever I start working with a new microcontroller platform...
How to do bidirectional logging over SWD on ARM.
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