Watchdog Monitor Application

Overview

The Watchdog Monitor Application sends heartbeats to the external watchdog timer and exchanges heartbeats with the Payload Controller to ensure both computers remain operational, enabling fail-over if the OBC becomes unresponsive.

Data Input

Incoming heartbeat signal from Payload Controller Application
Do we need a signal from the watchdog itself?

Data Output

Heartbeat signal to the watchdog timer on I²C and payload controller on CAN
Alter watchdog timeout length

Data Processing

Reboot payload controller if unresponsive through a reset line

Integration Points with PULSE-A Applications

Communication Manager Application: Exchanges heartbeat data for radio

Integration Points with NASA Provided Applications

SBN Application: Connects to Software Bus Network

Integration Points with Hardware

Watchdog GPIO pins: Sends heartbeat signals
Reset line: Controls payload controller reboot

Integration Points with Other Software

Software Bus: Publishes watchdog status