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arduino-cli/libraries/OneButton/examples/SpecialInput/SpecialInput.ino

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+/*
+ * SpecialInput.ino - Example for the OneButtonLibrary library.
+ * This is a sample sketch to show how to use the OneClick library on other input sources than standard digital pins.
+ *
+ * The library internals are explained at
+ * http://www.mathertel.de/Arduino/OneButtonLibrary.aspx
+ *
+ * Setup a test circuit:
+ * * Connect a pushbutton to pin 2 (ButtonPin) and ground.
+ *   
+ * The sketch shows how to setup the library and bind the functions (singleClick, doubleClick) to the events.
+ * In the loop function the button.tick function must be called as often as you like.
+ *
+ * * 22.01.2021 created by Matthias Hertel
+*/
+
+#include "OneButton.h"
+
+// This is an example on how to use the OneClick library on other input sources than standard digital pins.
+// 1. do not use a pin in the initialization of the OneClick library.
+// 2. pass the input state to the tick function.
+
+// You can also find how to create an instance in setup and not by declaration.
+// You can also find how to use inline callback functions.
+
+#if defined(ARDUINO_AVR_UNO) || defined(ARDUINO_AVR_NANO_EVERY)
+#define PIN_INPUT 2
+
+#else if defined(ESP8266)
+#define PIN_INPUT D3
+
+#endif
+
+
+// OneButton instance will be created in setup.
+OneButton *button;
+
+void fClicked(void *s)
+{
+  Serial.print("Click:");
+  Serial.println((char *)s);
+}
+
+void setup()
+{
+  Serial.begin(115200);
+  Serial.println("One Button Example with custom input.");
+
+// create the OneButton instance without a pin.
+  button = new OneButton();
+
+  // Here is an example on how to use a parameter to the registered function:
+  button->attachClick(fClicked, "me");
+
+  // Here is an example on how to use an inline function:
+  button->attachDoubleClick([]() { Serial.println("DoubleClick"); });
+
+  // setup your own source of input:
+  pinMode(PIN_INPUT, INPUT_PULLUP);
+
+} // setup()
+
+void loop()
+{
+  // read your own source of input:
+  bool isPressed = (digitalRead(PIN_INPUT) == LOW);
+
+  // call tick frequently with current push-state of the input
+  button->tick(isPressed);
+} // loop()