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laforge, 08/10/2022 10:24 AM
attiny-wdt
¶
attiny-wdt
is an OSHW + open source firmware project of turning an Attiny{4,5,9,10} microcontroller into a hardware watchdog that can be used to reset another CPU/SoC when it gets stuck.
The primary use case was to use it with Raspberry Pi devices. Those do have a built-in hardware watchdog themselves, but unfortuantelly it is not documented at the register-level and there is no option to enable it straight from the boot loader, so it is not really providing the kind of guarantees one would expect from a watchdog.
Pictures¶
The pictures below show three hand-soldered prototypes:
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Updated by laforge almost 2 years ago · 1 revisions