add hardware watchdog feature (implementation using the attiny watchdog) #4
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- the Dockerfile contains all required dependencies - firmware patch: c++ doesn't allow forward declaration
When this feature is enabled, if the pi fails to reset the watchdog timer, a full power cycle is triggered. Setting i2c register 0x10 to a non-zero value enables the feature and sets the watchdog timeout.
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When this feature is enabled, if the pi fails to reset the watchdog timer, a full power cycle is triggered.
Setting i2c register 0x10 to a non-zero value enables the feature, sets the watchdog timeout and clears the watchdog timer.