AHI Functions and Explanations for WatchDog (WDT)

WatchDog(WDT)

vAHI_WatchdogStart()

void vAHI_WatchdogStart(uint8 u8Prescale);

Starts the Watchdog Timer (WDT).

• The timeout period is set approximately. Specifically, when u8Prescale == 0, the timeout is 8 ms; otherwise, it is set as ((1UL << (u8Prescale - 1)) + 1) * 8 ms, passed to the_wwdt->init().
• If a value outside the valid range (u8Prescale > 12) is specified, u8Prescale = 10 (about 4 seconds) will be used.
• When compiled with -DDEBUG, this process is skipped, and the WDT remains stopped.

vAHI_WatchdogStop()

void vAHI_WatchdogStop();

On TWELITE GOLD, once started, the watchdog cannot be stopped.
This function is called when changing the watchdog timer’s timeout period, as shown below:

...
vAHI_WatchdogStop(); // Calls the stop API (actually does not stop)
vAHI_WatchdogStart(12); // Reconfigures to approximately 16 seconds

vAHI_WatchdogRestart()

void   vAHI_WatchdogRestart();

Call this before the watchdog timer times out.

• When compiled with -DDEBUG, this process is skipped.