Better tactile processing

crossbow/tactile.cpp

@@ -0,0 +1,42 @@
+#include "Arduino.h"
+#include "tactile.h"
+
+Tactile::Tactile(uint8_t pin) {
+    _pin = pin;
+}
+
+void Tactile::loop(void) {
+
+    uint8_t pinState = digitalRead(_pin);
+
+    //Press moment
+    if (pinState == LOW && _previousPinState == HIGH) {
+        _pressMillis = millis();
+    }
+
+    //Release moment
+    if (pinState == HIGH && _previousPinState == LOW) {
+        const uint32_t buttonTime = abs(millis() - _pressMillis);
+
+        if (buttonTime > TACTILE_LONG_PRESS_TIME) {
+            _state = TACTILE_STATE_LONG_PRESS;
+        } else if (buttonTime > TACTILE_MIN_PRESS_TIME) {
+            _state = TACTILE_STATE_SHORT_PRESS;
+        } else {
+            _state = TACTILE_STATE_NONE;
+        }
+
+    } else {
+        _state = TACTILE_STATE_NONE;
+    }
+
+    _previousPinState = pinState;
+}
+
+void Tactile::start(void) {
+    pinMode(_pin, INPUT_PULLUP);
+}
+
+uint8_t Tactile::getState(void) {
+    return _state;
+}