STM32F407 AND FREEZ IWDG

[ASSAAD.ASSAAD]

Posted on February 06, 2017 at 14:01

Hello

could you show me example how to stop or freez IWDG in STM32F407 ?

Thank you in advanced

[AvaTar]

Posted on February 06, 2017 at 14:29

could you show me example how to stop or freez IWDG in STM32F407 ?

This assumes that a running WDG can be stopped.

This assumption is wrong. Once running, you need to 'feed' it constantly, or face reset.

This 'feature' was/is discussed here occasionally. Perhaps a search would bring up previous, similar threads - if they didn't go lost during the Great Transition, or a former meltdown.

[waclawek.jan]

Posted on February 06, 2017 at 14:34

AvaTar wrote:

 

This 'feature' was/is discussed here occasionally.

e.g.

https://community.st.com/0D50X00009Xkdq7SAB

 

[Imen.D]

Posted on February 14, 2017 at 13:14

Hello

ASSAAD.ASSAAD

,

In STOP mode, once the watchdog is started, then it cannot be stopped except by a reset.

According to the reference manual

http://www.st.com/content/ccc/resource/technical/document/reference_manual/3d/6d/5a/66/b4/99/40/d4/DM00031pdf/files/DM00031pdf/jcr:content/translations/en.DM00031pdf

: '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 21: Independent watchdog (IWDG).'

Hope this helps you.

Regards

Imen

You are an STM32 user and want to express your trust for our products and win a 3D printer?

Get your chance participating in

https://community.st.com/community/stm32-community/embedded-world-contest

[ASSAAD.ASSAAD]

Posted on February 14, 2017 at 19:47

Thank you Imen ;

My question is about standby mode ; is it same No way to freeze it or stop it ( standby not stop ) ?

Regards

Assaad

[Imen.D]

Posted on February 15, 2017 at 09:36

Hi ASSAAD,

In Standby mode: once the IWDG is started, it cannot be stopped except by a reset.

Regards

Imen