STM32F767 and IWDG Reload counter

[Pilous Droip]

Posted on May 09, 2018 at 07:57

Hi friends,

I create a program on NUCLEO-F767ZI. I'm trying program on clean chip now. But I have a problem. On Nucleo it is working fine.

But on clean CPU I must call this function: LL_IWDG_ReloadCounter(IWDG); every some milisecond.....

But why? What is different on NUCLEO-F767ZI and my STM32F767ZI? I think nothing.

Any idea, how to disable IWDG? I try everything,

http://www.st.com/content/ccc/resource/technical/document/reference_manual/group0/96/8b/0d/ec/16/22/43/71/DM00224583/files/DM00224583.pdf/jcr:content/translations/en.DM00224583.pdf&sharppage=1113

#watchdogs #nucleo-f767zi #stm32f767zi #stm32-iwdg

[Imen.D]

Posted on May 18, 2018 at 15:21

Hello

Droip.Pilnik

,

What do you mean by '

clean CPU'?

Is this behavior is seen on your NUCLEO-F767ZI or with your custom board?

In fact, once enabled the IWDG, it can not disabled unless it goes again to reset if enabled by software and not by Hardware.

According to the reference manual RM0410:

Independent watchdog (IWDG): the IWDG is started by writing to its Key register or by hardware option. Once started it cannot be stopped except by a reset. See Section 3 in Section 30: Independent watchdog (IWDG)

With Regards,

Imen