Want to get better printf tools with faster and more options then this video is for you.
i take a look at SEGGER´s software RTT-VIEWER and take you from donwload and installing to get it into a STM32 Project and making some basic demos on what you can do with this free of charge tool.
https://www.segger.com/downloads/jlink/
https://wiki.segger.com/RTT#SEGGER_RT...
https://wiki.segger.com/J-Link_RTT_Vi...
https://www.segger.com/products/debug...
https://webshop.nohau.se/product-cate...