WATCHDOG

Table of Contents

• Features Supported
• SysConfig Features
• Features NOT Supported
• Important Usage Guidelines
• Example Usage
• API

The WATCHDOG driver provides API for safety diagnostic which can detect a runaway CPU and generate either a reset or NMI (non-maskable interrupt) response. It generates resets or NMIs after a programmable period, or if no correct key sequence was written to the RTIWDKEY register.

Features Supported

• Supports Watchdog interrupt mode.
• Supports digital windowed Watchdog feature.

SysConfig Features

Note

It is strongly recommend to use SysConfig where it is available instead of using direct SW API calls. This will help simplify the SW application and also catch common mistakes early in the development cycle.

• Selection of Watchdog instances.
• Option to select Watchdog Window size.
• Option to select Watchdog expiry time in millisecond.

Features NOT Supported

• NA

Important Usage Guidelines

• Important Usage Guildelines

Example Usage

Include the below file to access the APIs

#include <drivers/watchdog.h>

Instance Open Example

    Watchdog_Params      params;
 
    Watchdog_paramsInit(&params);
    params.resetMode  = Watchdog_RESET_ON;
    gWatchdogHandle = Watchdog_open(CONFIG_WDT0, &params);
    if (!gWatchdogHandle) {
        DebugP_assert(FALSE);
    }

Instance Close Example

    Watchdog_close(gWatchdogHandle);

Watchdog Service Example

    Watchdog_clear(gWatchdogHandle);

API

APIs for WDT