Using CubeIDE code breaks with HAL_Delay() at uwTick on HAL_GetTick

[Bajoras]

I'm using a custom board with a STM32L431RCT6 MCU and I need to activate the Ultra Low Power modes on it. I'm trying to use HAL_Delay before HAL_PWR_EnterSTANDBYMODE() and that's where the code breaks. Does anyone have any sugestion on how to fix the problem?
I'm a beginner using CubeIDE and using microcontrollers in general.

[TDK]

Sounds like you might be disabling SysTick before entering standby, in which case HAL_Delay won't work. You should still disable SysTick, but you can't use HAL_Delay after that point.

[Souhaib MAZHOUD · Accepted solution]

Hi @Bajoras 

Thank you for posting.

Try to configure WakeUP4 Pin (you can configure it with STM32CubeMX : System Core>SYS>Mode) before you run HAL_PWR_EnterSTANDBYMode(); 

Thank you.

Souhaib

[Bajoras]

Hello, thank you for the fast response! It works, I just needed to activate WakeUP4 Pin, but why does it work doing just that? I didn't include anything related to the WakeUP4 Pin in my code, just checking it in the .ioc file did the trick. Can someone explain it to me, please?

[Piranha]

Because all of the HAL/Cube code is a broken bloatware.

https://community.st.com/t5/stm32-mcus-embedded-software/how-to-enter-standby-or-shutdown-mode-on-stm32/m-p/145849

[Bajoras]

I found out later that I didn't really need the WakeUP4Pin and the code was actually breaking within the HAL_PWR_EnterSTANDBYMODE(), I needed to reallocate the vector table by uncommenting the line 126 at "system_stm32l4xx.c". Thanks for the responses