Watchdog restarting issue in STM32MP157.

[Srikanth1]

Hello

We are implementing WWDG watchdog in our custom board to cortex-M4 core in cubeIDE tool.

We initialise the following registers

-> enable the clock to WWDG

-> In control register enable the Watchdog enable bit and watchdog counter.

-> In configuration register enabled Early wakeup interrupt and timer base , window value.

while updating the watchdog counter before reaching window value, code is working fine.

While not updating watchdog counter , After some time we are getting Early wakeup interrupt read in status register. In this case code has not restarted. May be what is the issue ?

Is this followed sequence ok/Not ?.

Help me in this regards.

regards

srikanth

[PatrickF]

Hi @Srikanth​ 

sorry for late answer.

Maybe the debugger freeze the WWDG in debug state (See DBGMCU_APB1FZ1/2 registers)

Are you sure your code is not restarted?

It could be restarted but crashed ?

Cortex-M4 could be in hold-boot (RCC_MP_GCR.BOOT_MCU=0)

Regards,

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