The on-orbit Astro-Pi configuration has no real method of signalling a hardware lockup to users. In the extended deployment case, the device could be left running for weeks thus an indication of watchdog timeout on the LED matrix is required.
https://www.kernel.org/doc/Documentation/devicetree/bindings/watchdog/gpio-wdt.txt
The on-orbit Astro-Pi configuration has no real method of signalling a hardware lockup to users. In the extended deployment case, the device could be left running for weeks thus an indication of watchdog timeout on the LED matrix is required.
https://www.kernel.org/doc/Documentation/devicetree/bindings/watchdog/gpio-wdt.txt