|Harald Welte 42c50e9a43|
attiny-wdt: Turn an ATtiny9 uC into a watchdog for another processor
The ATtiny9 is a small, ultra low cost microcontroller available in SOT-23 package. It is lower cost (and currently better available) than dedicated hardware watchdog ICs.
So this project turns the ATtiny9 into a very simple "hardware watchdog IC" for another processor/CPU.
The watchdog starts counting immediately from power-on and will trigger a reset of the target system after 67s, unless the target system keeps refreshing the watchdog via a low edge on another signal.
The device has been developed and tested, and has been deployed in production in hundreds of systems.
You can clone from the official repository using
git clone https://gitea.osmocom.org/electronics/attiny-wdt
There is a web interface at https://gitea.osmocom.org/electronics/attiny-wdt