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Watchdog HAL interface documentation

Hardware introduction

K230 integrates a watchdog timer (Watchdog Timer) for monitoring the system running status. When the system is abnormal and cannot “feed the dog” in time, the watchdog will trigger a system reset to prevent the system from crashing. The watchdog timeout is configurable and supports start, stop and dog feeding operations.

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Function interface description

int wdt_set_timeout(uint32_t timeout_sec);

Function: Set watchdog timeout.

parameter:

• timeout_sec: timeout (seconds)

Return Value:

• 0: Success

• -1: failed

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uint32_t wdt_get_timeout(void);

Function: Get the current watchdog timeout setting.

Return Value:

• >=0: Current timeout (seconds)

• -1: failed

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int wdt_start();

Function: Start watchdog. Dogs need to be fed regularly after startup, otherwise the system will reset after timeout.

Return Value:

• 0: Success

• -1: failed

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int wdt_stop();

Function: Stop watchdog.

Return Value:

• 0: Success

• -1: failed

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int wdt_feed();

Function: Feed the dog operation, refresh the watchdog timer, and prevent system reset.

Return Value:

• 0: Success

• -1: failed

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Usage example

Please refer to src/rtsmart/libs/testcases/rtsmart_hal/test_wdt.c