initial commit

libraries/Adafruit_SleepyDog_Library/utility/WatchdogSAMD.h

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+#ifndef WATCHDOGSAMD_H
+#define WATCHDOGSAMD_H
+
+#include <Arduino.h>
+
+class WatchdogSAMD {
+public:
+  WatchdogSAMD() : _initialized(false) {}
+
+  // Enable the watchdog timer to reset the machine after a period of time
+  // without any calls to reset().  The passed in period (in milliseconds)
+  // is just a suggestion and a lower value might be picked if the hardware
+  // does not support the exact desired value.
+  // User code should NOT set the 'isForSleep' argument either way --
+  // it's used internally by the library, but your sketch should leave this
+  // out when calling enable(), just let the default have its way.
+  //
+  // The actual period (in milliseconds) before a watchdog timer reset is
+  // returned.
+  int enable(int maxPeriodMS = 0, bool isForSleep = false);
+
+  // Reset or 'kick' the watchdog timer to prevent a reset of the device.
+  void reset();
+
+  // Find out the cause of the last reset - see datasheet for bitmask
+  uint8_t resetCause();
+
+  // Completely disable the watchdog timer.
+  void disable();
+
+  // Enter the lowest power sleep mode (using the watchdog timer) for the
+  // desired period of time.  The passed in period (in milliseconds) is
+  // just a suggestion and a lower value might be picked if the hardware
+  // does not support the exact desired value
+  //
+  // The actual period (in milliseconds) that the hardware was asleep will be
+  // returned.
+  int sleep(int maxPeriodMS = 0);
+
+private:
+  void _initialize_wdt();
+
+  bool _initialized;
+};
+
+#endif