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libraries/Adafruit_SleepyDog_Library/utility/WatchdogRP2350/WatchdogRP2350.h

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+/*!
+ * @file WatchdogRP2350.h
+ *
+ * Support for RP2350 Hardware Watchdog Timer API
+ *
+ * Adafruit invests time and resources providing this open source code,
+ * please support Adafruit and open-source hardware by purchasing
+ * products from Adafruit!
+ *
+ * Written by Brent Rubell for Adafruit Industries.
+ *
+ * MIT License, all text here must be included in any redistribution.
+ *
+ */
+#ifndef WATCHDOGRP2350_H_
+#define WATCHDOGRP2350_H_
+
+#include "pico/aon_timer.h"
+#include "pico_sleep/include/pico/sleep.h"
+#include <hardware/watchdog.h>
+#include <pico/time.h>
+
+// Callback type for wake-from-sleep functions
+typedef void (*WakeCb)(void);
+
+/**************************************************************************/
+/*!
+    @brief  Class that contains functions for interacting with the
+            RP2350's hardware watchdog timer and low-power sleep functionality.
+*/
+/**************************************************************************/
+class WatchdogRP2350 {
+public:
+  WatchdogRP2350() : _wdto(-1), _aon_timer_started(false){};
+  // Watchdog API
+  int enable(int maxPeriodMS = 0);
+  void disable()
+      __attribute__((error("RP2350 WDT cannot be disabled once enabled")));
+  void reset();
+  // Low-power ("sleep") mode API
+  int sleep(
+      int maxPeriodMS = 0); // Basic sleep function, handled by software timer
+  // Advanced "Sleep" State API
+  // Sleep State (6.5.2, 6.5.3 in RP2350 Datasheet)
+  void goToSleepUntil(int max_period_ms = 0, bool is_dormant = false);
+  void goToSleepUntilPin(uint gpio_pin, bool edge = false, bool high = false);
+  // Advanced sleep state helper functions
+  void setWakeCb(WakeCb cb);
+  void resumeFromSleep();
+  long getSleepDuration();
+
+private:
+  int _wdto;
+  WakeCb _cb_wake = nullptr;
+  struct timespec _ts_sleep_start;
+  bool _aon_timer_started;
+  bool startAonTimer();
+};
+
+#endif // WATCHDOGRP2350_H_