1.25.25 1.26.22 Watchdog Timer (WDT)

Using The Library

The WDT is used to prevent system lockup if the software becomes trapped in a deadlock. It is supplied with VDDCORE. It restarts with initial values on processor reset.

The WDT is built around a 12-bit down counter loaded with the value defined in field PERIOD of the Window Level Register (WDT_WLR). WDT uses slow clock divided by 128 to establish the maximum watchdog period to 16 seconds (with a typical slow clock of 32.768 kHz).

Here is an example code to enable watchdog timer and keep clearing at regular intervals

WDT_Enable();

while ( true )
{
    // Application Code

    WDT_Clear();
}

Library Interface

Watchdog Timer peripheral library provides the following interfaces:

Functions

Data types and constants