63 lines
2.4 KiB
C++
63 lines
2.4 KiB
C++
// Adafruit Watchdog Library Basic Usage Example
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//
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// Simple example of how to use the watchdog library.
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//
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// Author: Tony DiCola
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#include <Adafruit_SleepyDog.h>
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void setup() {
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Serial.begin(115200);
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while (!Serial) ; // wait for Arduino Serial Monitor (native USB boards)
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Serial.println("Adafruit Watchdog Library Demo!");
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Serial.println();
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// First a normal example of using the watchdog timer.
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// Enable the watchdog by calling Watchdog.enable() as below. This will turn
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// on the watchdog timer with a ~4 second timeout before reseting the Arduino.
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// The estimated actual milliseconds before reset (in milliseconds) is returned.
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// Make sure to reset the watchdog before the countdown expires or the Arduino
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// will reset!
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int countdownMS = Watchdog.enable(4000);
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Serial.print("Enabled the watchdog with max countdown of ");
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Serial.print(countdownMS, DEC);
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Serial.println(" milliseconds!");
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Serial.println();
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// Now loop a few times and periodically reset the watchdog.
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Serial.println("Looping ten times while resetting the watchdog...");
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for (int i = 1; i <= 10; ++i) {
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Serial.print("Loop #"); Serial.println(i, DEC);
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delay(1000);
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// Reset the watchdog with every loop to make sure the sketch keeps running.
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// If you comment out this call watch what happens after about 4 iterations!
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Watchdog.reset();
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}
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Serial.println();
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// Disable the watchdog entirely by calling Watchdog.disable();
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Watchdog.disable();
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// Finally demonstrate the watchdog resetting by enabling it for a shorter
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// period of time and waiting a long time without a reset. Notice you can pass
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// a _maximum_ countdown time (in milliseconds) to the enable call. The library
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// will try to use that value as the countdown, but it might pick a smaller
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// value if the hardware doesn't support it. The actual countdown value will
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// be returned so you can see what it is.
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countdownMS = Watchdog.enable(4000);
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Serial.print("Get ready, the watchdog will reset in ");
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Serial.print(countdownMS, DEC);
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Serial.println(" milliseconds!");
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Serial.println();
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delay(countdownMS+1000);
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// Execution will never get here because the watchdog resets the Arduino!
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}
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void loop() {
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// We'll never actually get to the loop because the watchdog will reset in
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// the setup function.
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Serial.println("You shouldn't see this message.");
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delay(1000);
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}
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