Adding all files from Project 1 to start

src/rotary_encoder_driver.cpp

@@ -0,0 +1,56 @@
+#include "rotary_encoder_driver.h"
+#include <avr/interrupt.h>
+
+RotaryEncoderDriver* driver = nullptr;
+
+RotaryEncoderDriver::RotaryEncoderDriver()
+    : cycle(0)
+    , count(0)
+    , prev_count(0)
+    , led(5)
+    , eA(2)
+    , eB(5) {}
+
+void RotaryEncoderDriver::begin() {
+    driver = this;
+
+    led.init();
+    eA.init();
+    eB.init();
+
+    EICRA |= (1<<ISC01) | (1<<ISC00);
+    EIMSK |= (1<<INT0);
+
+    timer.init(100);
+}
+
+void RotaryEncoderDriver::update() {
+    count += eB.is_hi() ? 1 : -1;
+    led.set_hi();
+}
+
+int RotaryEncoderDriver::position() {
+    led.set_lo();
+    return count;
+} 
+
+void RotaryEncoderDriver::update_delta() {
+    if (++cycle == 0) {
+        delta = count - prev_count;
+        prev_count = count;
+    }
+    led.set_lo();
+}
+
+float RotaryEncoderDriver::count_per_sec() {
+    return delta / (256.0f * 0.0001f);
+}
+
+
+ISR(INT0_vect) {
+    driver->update();
+}
+ISR(TIMER1_COMPA_vect) {
+    driver->update_delta();    
+}
+