feat: Add Programmed External Keys.

examples/ProgrammableButtons/ProgrammableButtons.ino

@@ -0,0 +1,63 @@
+/*
+ Programmed External Keys (Keyboard)
+
+ For native USB Arduino boards (e.g., Leonardo, Micro, MKR, Nano 33 IoT, Zero, Due)
+
+ When the first button is pressed, the Ctrl + C keyboard shortcut (copy) is emulated.
+ When the second button is pressed, the Ctrl + V keyboard shortcut (paste) is emulated.
+
+ The circuit:
+ The push buttons have 2 connectors.
+ Connect one to GND and the other to the I/O pin defined in the btnPin array.
+
+ created 18 March 2020
+ by Prathamesh Sahasrabhojane (TheShubham99)
+*/
+
+#include <Keyboard.h>
+
+const int btnPin[] = {2, 3, 4, 5};
+int pincount = 2;
+int btnState[pincount];
+int prevBtnState[] = {HIGH, HIGH, HIGH, HIGH};
+
+unsigned long lastDebounceTime[] = {0, 0, 0, 0};
+unsigned long debounceDelay = 50;
+
+void setup() {
+ for (int thisPin = pincount - 1; thisPin >= 0; thisPin--) {
+ pinMode(btnPin[thisPin], INPUT_PULLUP);
+ }
+ Keyboard.begin();
+}
+
+// Place the actions needed after pin press here
+void outputAction(int currentButton) {
+ if (currentButton == 1) {
+ Keyboard.press(KEY_LEFT_CTRL);
+ Keyboard.press('c');
+ delay(100);
+ Keyboard.releaseAll();
+ }
+ else if (currentButton == 2) {
+ Keyboard.press(KEY_LEFT_CTRL);
+ Keyboard.press('v');
+ delay(100);
+ Keyboard.releaseAll();
+ }
+}
+
+void loop() {
+ for (int thisPin = pincount - 1; thisPin >= 0; thisPin--) {
+ btnState[thisPin] = digitalRead(btnPin[thisPin]);
+
+ if ((btnState[thisPin] != prevBtnState[thisPin]) && (btnState[thisPin] == LOW)) {
+ if ((millis() - lastDebounceTime[thisPin]) > debounceDelay) {
+ outputAction(thisPin);
+ lastDebounceTime[thisPin] = millis();
+ }
+ }
+
+ prevBtnState[thisPin] = btnState[thisPin];
+ }
+}