IWDG on STM32f3

[abelletoile9]

Posted on July 10, 2013 at 10:34

Dear all,

I'm currently developping under stm32f3 discovery and I'm experiencing difficulties with the IWDG. In a first version of my software, I've been using the std peripheral library to set up the IWDG with the following code :    uint16_t reload = 0x0FFF;          IWDG_WriteAccessCmd (IWDG_WriteAccess_Enable);     IWDG_SetPrescaler        (IWDG_Prescaler_256);     IWDG_SetReload             (reload);     while(IWDG_GetFlagStatus (IWDG_FLAG_PVU || IWDG_FLAG_RVU || IWDG_FLAG_WVU) == RESET);             IWDG_ReloadCounter();     IWDG_Enable(); And I simply use the following command to reload it : IWDG_ReloadCounter(); This works fine but, now if I comment the part of my code related to the IWDG and reflash the memory and hard reset the thing, The watchdog remain activated and keep on reseting... My questions are: Why does the IWDG keeps on running whereas I just don't use it anymore in my code ? Is there a way to shut it down ? Thanks for your help. #iwdg-stm32-deactivate

[Tesla DeLorean]

Posted on July 10, 2013 at 13:20

I'd suspect something else is going on, either you haven't removed/erased the code you think you have, or it's resetting for some other reason.

Output some other marker to indicate that the correct firmware is loaded, do a full erase of the part.