Calling the HAL_Delay() function after __HAL_DBGMCU_FREEZE_IWD() results in an infinite waiting state.

[SSeo.17]

In debug mode, __HAL_DBGMCU_FREEZEZE_IWD() was used to stop the IWDG. Later, the HAL_Delay() function results in an infinite waiting state. I'd appreciate it if you could let me know the cause and solution.

[SSeo.17 · Accepted solution]

It was my mistake.

It was STM32 reset because I set the IWDG counter too small.

Call HAL_Delay function after call of function __HAL_DBGMCU_FREEZE_IWDG() also works well.