move logic to python

rotary-kb.py

@@ -19,20 +19,22 @@ def print_state():
 	global pos
 	print(keys_display)
 	print(" " * pos + "^")
+	print(pos)
 
 while True:
 	event = arduino.readline().decode("utf-8").replace("\r\n", "")
-	if event:
+	if event == "cw":
-		if event.startswith("btn."):
+		pos = (pos + 1) % len(keys)
-			state = event[4]
+	elif event == "ccw":
-			if state == "0":
+		pos = (pos - 1 + len(keys)) % len(keys)
+	elif event == "down":
 		kb.press(keys[pos])
 		active_btn = pos
-			else:
+	elif event == "up":
 		kb.release(keys[active_btn])
 		active_btn = -1
-			# print(event)
+	
-		else:
+	if event:
-			pos = int(event)
+		print_state()
-			print_state()
+		print(event)
 

src/main.cpp

@@ -1,10 +1,11 @@
 #include <Arduino.h>
 
 #define PIN_BTN 5
+// CLK / pin A of rotary encoder
+#define PIN_A 11
+// DT / pin B of rotary encoder
+#define PIN_B 8
 
-#define PIN_A 11 // Connected to CLK
-#define PIN_B 8	// Connected to DT
-int rotation = 0;
 int prev_a;
 int prev_btn;
 //#define DEBUG
@@ -22,28 +23,22 @@ void setup() {
 void loop() {
 	// debug_signal();
 	int a = digitalRead(PIN_A);
-	int btn = digitalRead(PIN_BTN);
-
 	if (a != prev_a){ // Means the knob is rotating
-		if (digitalRead(PIN_B) != a) {	// Means pin A Changed first - We're Rotating Clockwise
+		if (digitalRead(PIN_B) != a) {	// Means pin A changed first - rotating clockwise
-			rotation++;
+			Serial.println("cw");
-			#ifdef DEBUG
+		} else {// Otherwise B changed first - counter clockwise
-			Serial.print("CW  ");
+			Serial.println("ccw");
-			#endif
-		} else {// Otherwise B changed first and we're moving CCW
-			rotation--;
-			#ifdef DEBUG
-			Serial.print("CCW ");
-			#endif
 		}
-		#ifdef DEBUG
-		Serial.print("pos: ");
-		#endif
-		Serial.println(rotation);
 	}
+
+	int btn = digitalRead(PIN_BTN);
 	if (btn != prev_btn) {
-		Serial.print("btn.");
+		if (btn) {
-		Serial.println(btn);
+			Serial.println("up");
+		}
+		else {
+			Serial.println("down");
+		}
 	}
 
 	prev_btn = btn;