CPU activity

[n.serina]

Posted on April 26, 2018 at 12:13

Hello , 

Is there any pin on stm32f446re nucleo board which can tell CPU is active or sleeping ? basically i want to know when CPU goes to sleep and when it wakes up by monitoring a gpio . i  dont have dont have power measurement equipment

Thank you . 

#stm32-nucleo-64

[Nesrine M_O]

Posted on April 26, 2018 at 15:40

Hi

n.serina

,

You canuse the userLED in your nucleo board to monitor the system state.

For example:

• LED2 toggling: system in RUN mode
• LED2 OFF: system inSleep mode

-Nesrine-