Library 60- CPU load monitor for STM32F4xx devices

Yesterday, I’ve made a post about monitoring CPU load depending on CPU work and it’s sleep time using DWT counter. This post can be found here.

This post is now a library, set together from post about CPU load.



  • Measures CPU load. Load depends between sleep time and work time of CPU
  • CPU load is updated for every System core clock cycles. In other words, that is each 1 second
  • DWT counter used for measurements
  • Sleep mode which is measured can be wait for interrupt or wait for event


    • STM32F4xx
    • STM32F4xx PWR
    • STM32F4xx
  • TM
    • defines.h

Functions and enumerations


Project is available on Github, download library below.


Owner of this site. Application engineer, currently employed by STMicroelectronics. Exploring latest technologies and owner of different libraries posted on Github.

You may also like...

Read before commenting!

Before you make a new comment, make sure you agree with things listed below:

  • - Read post to make sure if it is already posted what you are asking for,
  • - Make sure you have the latest version of libraries used in your project,
  • - Make a clean and grammatically correct written message,
  • - Report as many details as possible, including what have you done so far,
  • - Do NOT post any code here. Use Pastebin,
  • - Do NOT post any error codes here. Use Pastebin,
  • - Specify STM32Fxxx family and used Discovery/EVAL/Nucleo or custom made board,
  • - Make sure your clock is set correct for PLL,
  • - If you are using my HAL drivers, please check this post how to start.
Comment will be deleted on breaking these rules without notification!