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

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+/*
+ BlinkMachine.ino
+ 
+ This is a sample sketch to show how to use the OneButtonLibrary to detect double-click events on a button. 
+ 
+ Copyright (c) by Matthias Hertel, http://www.mathertel.de
+ This work is licensed under a BSD style license. See http://www.mathertel.de/License.aspx
+ More information on: http://www.mathertel.de/Arduino
+ 
+ The library internals are explained at
+ http://www.mathertel.de/Arduino/OneButtonLibrary.aspx
+ 
+ Setup a test circuit:
+ * Connect a pushbutton to pin A1 (Uno) or D3 (ESP8266) and ground.
+ * The pin 13 (UNO) or D4 (ESP8266) is used for output attach a led and resistor to ground
+ or see the built-in led on the standard arduino board.
+ 
+ The Sketch shows how to setup the library and bind a "machine" that can blink the LED slow or fast.
+ A click on the button turns the led on.
+ A doubleclick on the button changes the blink rate from ON to SLOW to FAST and back.
+ In the loop function the button.tick function has to be called as often as you like.
+
+ State-Diagram
+
+    start
+      |                   +-------\
+      V                   V       |
+  --------              ------    |
+ |  OFF   |<--click-+->|  ON  |   |
+  --------          |   ------    |
+                    |     |       |
+                    |   d-click   |
+                    |     |       |
+                    |     V       |
+                    |   ------    |
+                    +- | SLOW |   |
+                    |   ------    |
+                    |     |       |
+                    |   d-click   |
+                    |     |       |
+                    |     V    d-click
+                    |   ------    |
+                    +--| FAST |---/
+                        ------ 
+ */
+
+// 06.10.2012 created by Matthias Hertel
+// 26.03.2017 state diagram added, minor changes
+
+#include "OneButton.h"
+
+// The actions I ca do...
+typedef enum {
+  ACTION_OFF,  // set LED "OFF".
+  ACTION_ON,   // set LED "ON"
+  ACTION_SLOW, // blink LED "SLOW"
+  ACTION_FAST  // blink LED "FAST"
+} 
+MyActions;
+
+#if defined(ARDUINO_AVR_UNO) || defined(ARDUINO_AVR_NANO_EVERY)
+// Example for Arduino UNO with input button on pin 2 and builtin LED on pin 13
+#define PIN_INPUT A1
+#define PIN_LED 13
+
+#elif defined(ESP8266)
+// Example for NodeMCU with input button using FLASH button on D3 and using the led on -12 module (D4).
+// This LED is lighting on output level LOW.
+#define PIN_INPUT D3
+#define PIN_LED D4
+
+#endif
+
+// Setup a new OneButton on pin A1.  
+OneButton button(PIN_INPUT, true);
+
+MyActions nextAction = ACTION_OFF; // no action when starting
+
+
+// setup code here, to run once.
+void setup() {
+  // enable the standard led on pin 13.
+  pinMode(PIN_LED, OUTPUT);      // sets the digital pin as output
+
+  // link the myClickFunction function to be called on a click event.   
+  button.attachClick(myClickFunction);
+
+  // link the doubleclick function to be called on a doubleclick event.   
+  button.attachDoubleClick(myDoubleClickFunction);
+
+  // set 80 msec. debouncing time. Default is 50 msec.
+  button.setDebounceTicks(80);
+} // setup
+
+
+// main code here, to run repeatedly: 
+void loop() {
+  unsigned long now = millis();
+
+  // keep watching the push button:
+  button.tick();
+
+  // You can implement other code in here or just wait a while 
+
+  if (nextAction == ACTION_OFF) {
+    // do nothing.
+    digitalWrite(PIN_LED, LOW);
+
+  } else if (nextAction == ACTION_ON) {
+    // turn LED on
+    digitalWrite(PIN_LED, HIGH);
+
+  } else if (nextAction == ACTION_SLOW) {
+    // do a slow blinking
+    if (now % 1000 < 500) {
+      digitalWrite(PIN_LED, LOW);
+    } else {
+      digitalWrite(PIN_LED, HIGH);
+    } // if
+
+  } else if (nextAction == ACTION_FAST) {
+    // do a fast blinking
+    if (now % 200 < 100) {
+      digitalWrite(PIN_LED, LOW);
+    } else {
+      digitalWrite(PIN_LED, HIGH);
+    } // if
+  } // if
+} // loop
+
+
+// this function will be called when the button was pressed 1 time and them some time has passed.
+void myClickFunction() {
+  if (nextAction == ACTION_OFF)
+    nextAction = ACTION_ON;
+  else
+    nextAction = ACTION_OFF;
+} // myClickFunction
+
+
+// this function will be called when the button was pressed 2 times in a short timeframe.
+void myDoubleClickFunction() {
+  if (nextAction == ACTION_ON) {
+    nextAction = ACTION_SLOW;
+
+  } else if (nextAction == ACTION_SLOW) {
+    nextAction = ACTION_FAST;
+
+  } else if (nextAction == ACTION_FAST) {
+    nextAction = ACTION_ON;
+  } // if
+} // myDoubleClickFunction
+
+// End
+