CC3220S-LAUNCHXL: How to know the priority level when I use the Watchdog_init()? As I know, watchdog will cause an interrupt and trigger the callback when the counter reach zero. What is the priority level?

The watchdog timer module generates the first time-out signal (interrupt) when the 32-bit counter reaches the zero state after being enabled; enabling the counter also enables the watchdog timer interrupt. 

void watchdog_init(void)
{
Watchdog_Params params;

Watchdog_init();

/* Create and enable a Watchdog with resets enabled */
Watchdog_Params_init(&params);
params.callbackFxn = (Watchdog_Callback)watchdogCallback;
params.resetMode = Watchdog_RESET_ON;

watchdogHandle = Watchdog_open(Board_WATCHDOG0, &params);
if (watchdogHandle == NULL) {
/* Error opening Watchdog */
while (1);
}
}