delay()関数を使わない Arduino UNO でのLチカ

トップページ フォーラム 初心者向け delay()関数を使わない Arduino UNO でのLチカ

このトピックには6件の返信が含まれ、4人の参加者がいます。5 日、 16 時間前 MichaelFic さんが最後の更新を行いました。

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  • #114 返信



    このプログラムは delay() の代わりに millis()関数で経過時間をチェックして、

    millis() 関数(Arduino 日本語リファレンスより)


    実行中のプログラムがスタートしてからの時間 (unsigned long)

    /* Blink without Delay
     Turns on and off a light emitting diode (LED) connected to a digital
     pin, without using the delay() function.  This means that other code
     can run at the same time without being interrupted by the LED code.
     The circuit:
     * Use the onboard LED.
     * Note: Most Arduinos have an on-board LED you can control. On the UNO, MEGA and ZERO 
      it is attached to digital pin 13, on MKR1000 on pin 6. LED_BUILTIN is set to
      the correct LED pin independent of which board is used.
      If you want to know what pin the on-board LED is connected to on your Arduino model, check
      the Technical Specs of your board  at
     created 2005
     by David A. Mellis
     modified 8 Feb 2010
     by Paul Stoffregen
     modified 11 Nov 2013
     by Scott Fitzgerald
     modified 9 Jan 2017
     by Arturo Guadalupi
     This example code is in the public domain.

    // constants won't change. Used here to set a pin number :
    const int ledPin =  LED_BUILTIN;// the number of the LED pin
    // Variables will change :
    int ledState = LOW;             // ledState used to set the LED
    // Generally, you should use "unsigned long" for variables that hold time
    // The value will quickly become too large for an int to store
    unsigned long previousMillis = 0;        // will store last time LED was updated
    // constants won't change :
    const long interval = 1000;           // interval at which to blink (milliseconds)
    void setup() {
      // set the digital pin as output:
      pinMode(ledPin, OUTPUT);
    void loop() {
      // here is where you'd put code that needs to be running all the time.
      // check to see if it's time to blink the LED; that is, if the
      // difference between the current time and last time you blinked
      // the LED is bigger than the interval at which you want to
      // blink the LED.
      unsigned long currentMillis = millis();
      if (currentMillis - previousMillis >= interval) {
        // save the last time you blinked the LED
        previousMillis = currentMillis;
        // if the LED is off turn it on and vice-versa:
        if (ledState == LOW) {
          ledState = HIGH;
        } else {
          ledState = LOW;
        // set the LED with the ledState of the variable:
        digitalWrite(ledPin, ledState);
    #1558 返信


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    #3168 返信


    How can I trigger interrupt on LOW state for Arduino UNO, I mean not on CHANGE or FALLING, but on LOW state
    Flowcode 7
    as from ARDUINO Refernce “LOW to trigger the interrupt whenever the pin is LOW”

    Thanks in advance

    #3179 返信


    arduino is running and even with arduino ide program, lcd keypad shield is working. in flowcode, arduino is work, but in flowcode ı could not do anything about lcd, not work lcd. ı can do control back light but write problem.

    #3456 返信


    In my opinion you are mistaken. I can prove it. Write to me in PM, we will talk.

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