initial commit

libraries/Adafruit_SleepyDog_Library/examples/SleepRP2350Pin/SleepRP2350Pin.ino

@@ -0,0 +1,69 @@
+// Adafruit Watchdog Library - RP2350 Pin/GPIO Sleep Example
+//
+// Simple example for using the Adafruit Watchdog Library to put the RP2350 to
+// sleep until a GPIO pin changes state.
+//
+// Brent Rubell for Adafruit Industries
+//
+// NOTE: After uploading, physically unplug and replug the USB cable to
+// reset the AON timer correctly before running.
+
+#include <Adafruit_SleepyDog.h>
+#ifdef USE_TINYUSB
+#include <Adafruit_TinyUSB.h>
+#else
+#include "USB.h"
+#endif
+#define WAKE_PIN 2 // GPIO pin to wake on, change as needed for your use case
+
+void setup() {
+  pinMode(LED_BUILTIN, OUTPUT);
+  digitalWrite(LED_BUILTIN, HIGH);
+
+  Serial.begin(115200);
+  // while (!Serial);
+  Serial.println("Adafruit Watchdog Library - RP2350 Sleep Pin/GPIO Demo!");
+  Serial.println();
+}
+
+void loop() {
+  Serial.println("Going to sleep in 5 seconds...");
+  Serial.println("To wake up, connect GPIO pin 2 to 3.3V (for HIGH wake).");
+  delay(5000);
+
+  // Enter Sleep mode for 5 seconds
+  digitalWrite(LED_BUILTIN, LOW);
+
+  // Sleep until GPIO WAKE_PIN goes HIGH on a rising edge
+  Watchdog.goToSleepUntilPin(WAKE_PIN, true, true);
+
+  // Sleep until GPIO WAKE_PIN goes HIGH on a falling edge
+  // Watchdog.goToSleepUntilPin(WAKE_PIN, false, true);
+
+  // Sleep until GPIO WAKE_PIN goes LOW on a rising edge
+  // Watchdog.goToSleepUntilPin(WAKE_PIN, true, false);
+
+  // Sleep until GPIO WAKE_PIN goes LOW on a falling edge
+  // Watchdog.goToSleepUntilPin(WAKE_PIN, false, false);
+
+  // Re-enable clocks, generators, USB and resume execution
+  // NOTE: This MUST be called to properly resume from sleep!
+  Watchdog.resumeFromSleep();
+  #ifndef USE_TINYUSB
+  // Re-enable USB after sleep. Required for Windows where USB
+  // does not re-enumerate automatically. On macOS and Linux, USB is
+  // maintained across sleep cycles. If you use an external serial terminal
+  // (e.g. screen, minicom), comment out USB.disconnect() and USB.connect()
+  // to prevent the port from disconnecting on each wake cycle.
+  USB.disconnect();
+  delay(500); // Give host time to register disconnect before reconnecting
+  USB.connect();
+  #endif
+
+  // NOTE: We can not track sleep duration when waking from a pin because we use
+  // the crystal oscillator as the dormant clock source, so the AON timer we'd
+  // use to track sleep duration is turned off. If you need to track sleep
+  // duration, see the SleepRP2350Timer example which uses the AON timer to wake
+  // from sleep.
+  Serial.println("I'm awake now!");
+}