The question about Sleep mode

[XZou.1]

​I want to let STM32L552CC into sleep mode.

I add

HAL_PWR_EnterSLEEPMode(PWR_MAINREGULATOR_ON, PWR_SLEEPENTRY_WFI);

Build is OK,

but when Debug ,the error appeared,

 Why?

[KnarfB]

Looks like a problem with programming (flashing) your binary code, unrelated to HAL_PWR_EnterSLEEPMode.

Suggestions:

• update to the lastest STM32CubeIDE release (if not done already)
• Try STM32Programmer as an independent tool for programming (flashing). STM32Programmer cannot really debug, but if is works, it prooves that your electrical setup is okay
• Double-check that the correct chip is selected (flash size etc..)

hth

KnarfB

[MM..1]

When you activate some sleep modes your mcu stop react to debug. You need connect under reset and debug low power modes checkbox enabled in debuger config...