How to watchdog handler on BlueNRG-LP ?

AndyR1 · ‎2022-02-01

Hello,

With BlueNRG1/2, we got the WEAK_FUNCTION(void WDG_Handler(void) {}); in system_bluenrg1.c, but with BlueNRG-LP there is no wdg handler in system_BlueNRG_LP.c, so is it possible to have it in any way ?

Thanks.

AndyR1 · ‎2022-02-03

Hello @Sebastien DENOUAL ,

Thank you for answer, this example is to inform the reason after a reset, I was looking for a function when WDG reach 0, execute some code and then reset. I guess it's not possible on bluenrg-LP as the WDG is fully independent and directly connected to reset, this is a more secure version, unlike in bluenrg1/2 where there is WDG interrupt(so need to run code...)

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Sebastien DENOUAL · ‎2022-02-03

Hi @Community member ,

There is a code example in BlueNRG-LP showing usage of independant WDG.

...\BlueNRG-LP DK1.1.0\Projects\Peripheral_Examples\Examples_HAL\IWDG\IWDG_Reset

Concept is to check Reset Reason code at startup.

Reset reason is stored in RAM_VR virtual register.

In case of reset because of watchdog,

in RAM_VR.ResetReason, RCC_FLAG_WDGRST should be high.

Regards,

Sebastien.

AndyR1 · ‎2022-02-03

Hello @Sebastien DENOUAL ,

Thank you for answer, this example is to inform the reason after a reset, I was looking for a function when WDG reach 0, execute some code and then reset. I guess it's not possible on bluenrg-LP as the WDG is fully independent and directly connected to reset, this is a more secure version, unlike in bluenrg1/2 where there is WDG interrupt(so need to run code...)