HAL, STM32F746GDISCOVERY, STM32CubeIDE

[ADębs.1]

How to generate a break when the supply voltage drops below a certain value in the HAL?

Andrzej

[TDK]

If the answers to your previous posts on this topic were insufficient, please reply there with further details rather than creating another duplicate post with the same question.

https://community.st.com/s/question/0D53W00000sBTu0SAG/stm32f746gdisco-stm32cubeide-flash-supply-voltage-drop

https://community.st.com/s/question/0D53W00000uYj4KSAS/stm32f746gdiscovery-pwrpvd-stm32cubeide

[ADębs.1]

I will follow the comments.

I am working on writing to a FLASH uint32_t variable, on power off. I am trying to do this using PVD. So far, no luck. I wrote to FLASH and blocked contact with the Discovery disc. Turning off the power and trying to connect to the programmer will not work.

Andrzej

[SBEN .2]

Hello @Andrzej Dębski​ ,

If by generating a break you mean resetting the microcontroller, please check the Power Supply Supervisor section (2.4) of the Reference manual.

In this case you should use not HAL but LL (stm32h7xx_ll_pwr.c) to access the registers.

Best regards,

@SBEN .2​ 

[ADębs.1]

I was able to program the break when the voltage dropped. I used the wrong instruction.

static void PVD_NVIC_Init(void) {

   PWR_PVDTypeDef sConfigPVD;

   sConfigPVD.PVDLevel = PWR_PVDLEVEL_6;

   sConfigPVD.Mode = PWR_PVD_MODE_IT_FALLING;

   HAL_PWR_ConfigPVD(&sConfigPVD);

   HAL_PWR_EnablePVD();

}

Without interruption.

Now I will try to write to FLASH. I will inform.

Best regards

Andrzej

[Tesla DeLorean]

Writing flash into a collapsing supply,​ probably a good way to brick things.