nRF9160 watchdog timer can reset all hardfault?

RE: nRF9160 watchdog timer can reset all hardfault?

bbslhb — Wed, 14 Aug 2019 02:51:11 GMT

Got that. Thanks.

A reset in HardFault stuck is enough. Watchdog event is not necessary.

RE: nRF9160 watchdog timer can reset all hardfault?

Håkon Alseth — Tue, 13 Aug 2019 11:29:53 GMT

You will get a watchdog reset if the timer expires. However; you will not get the watchdog event if you are stuck in a high priority interrupt.

Reset will occur.

RE: nRF9160 watchdog timer can reset all hardfault?

bbslhb — Tue, 13 Aug 2019 07:21:13 GMT

I means system stuck in HardFault.

Our custom board 5V power supply is controled by a certain GPIO of nRF9160SIP.

Our product will be recalled if stuck in HardFault which caused the certain GPIO can't be set to HIGH or LOW.

RE: nRF9160 watchdog timer can reset all hardfault?

Håkon Alseth — Mon, 12 Aug 2019 10:55:35 GMT

Hi,

A watchdog is a peripheral which has one main purpose; to reset if the timer expires.

If a fault-condition occurs, like HardFault or UsageFault, the watchdog will reset when the watchdog-timer expires.

The watchdog peripheral has the option to generate an event 2 LFCLK clock cycles prior to a reset occurring, so that the application can potentially be warned that a reset is coming soon.

If you are stuck in HardFault; this event cannot be processed, as HardFault is a hard-coded high priority interrupt handler.

Kind regards,

Håkon