Number Guess Timer example, Arduino code.Sample code for a HHS challenge.

NumberGuessTimer.ino

/**
 * Number Guess Timer example.
 * Sample code for a HHS challenge.
 *
 * @author Tim Visée
 * @website http://timvisee.com/
 */

#include <Arduino.h>

/** Timer timeout, period in milliseconds to break the loop if nothing happens. 1 second in this case. */
int TIMER_TIMEOUT = 1000;

/** The actual timer, this specifies the time to break the loop at in milliseconds. */
long timer = -1;



/**
 * Start the timer, and set the proper timeout.
 * This method can be used multiple times to update the timeout time.
 */
void startTimer() {
    timer = millis() + TIMER_TIMEOUT;
}

/**
 * Check whether the timer is finished.
 * If the timer isn't started, or if it has been reset, false will be returned.
 *
 * @return True if the timer has been started and has finished, false otherwise.
 */
bool isTimerFinished() {
    return millis() >= timer && timer >= 0;
}

/**
 * Stop the timer.
 * Change the timeout value to minus one, to ignore the whole timer.
 */
void stopTimer() {
    timer = -1;
}



/**
 * Called once on setup.
 */
void setup() { }

/**
 * Called each loop.
 */
void loop() {
    // Start the timer
    startTimer();

    // Loop until the timer has been finished
    while(!isTimerFinished()) {
        // TODO: Check whether the button is pressed, replace variable in the if-statement below:
        if(buttonPressed) {
            // TODO: Add one to the entered number here.

            // Reset and start the timer again
            startTimer();
        }

        // TODO: Do some other stuff here, if you'd like.
    }

    // Reset and stop the timer
    stopTimer();
}