added display timeout

software/GToE/GToE.ino

@@ -11,6 +11,7 @@
 #define PULSE_LENGTH 12 //ms (with 12 ms you can't get higher than 208bpm)
 #define MAXBPM 200 //250 at 24ppqn with 5ms pulse will be 50/50 square wave
 #define MINBPM 20
+#define SCREEN_TIMEOUT 30000 //30 sec
 
 #define INPUT_PIN 2 //needs to be an interrupt pin
 #define ENC_BTN_PIN 14
@@ -46,7 +47,7 @@ int channelPulseCount[6];
 int channelPulsesPerCycle[6];
 int playingModes[6]; //actual channel modes array updated from channels each beat
 
-int pulsePeriod;
+unsigned int pulsePeriod;
 bool isPlaying = false;
 
 bool pulseCounted = false;
@@ -59,9 +60,9 @@ bool externalPulseCounted = true;
 unsigned long lastExtPulseTime;
 unsigned long newExtPulseTime;
 
-int displayTab = 0;
-int displayTabOld;
-int insideTab = 0;
+unsigned int displayTab = 0;
+unsigned int displayTabOld;
+unsigned int insideTab = 0;
 bool playBtnPushed = false;
 
 int a1Input = 0;
@@ -72,6 +73,8 @@ unsigned long encPressedTime;
 unsigned long encReleasedTime;
 bool encPressRegistered;
 
+unsigned long lastInteractionTime;
+
 Adafruit_SSD1306 display(128, 64, &Wire, -1);
 RotaryEncoder encoder(ENC_D1_PIN, ENC_D2_PIN, RotaryEncoder::LatchMode::TWO03);
 
@@ -134,6 +137,10 @@ void setup() {
 
 void loop() {
   checkInputs();
+  if ((millis() - lastInteractionTime) > SCREEN_TIMEOUT) {
+    display.clearDisplay();
+    display.display();
+  }
 }
 
 void clock() {
@@ -312,6 +319,7 @@ void checkInputs() {
     resetClocks();
     playBtnPushed = true;
     saveState();
+    lastInteractionTime = millis();
   } else if (digitalRead(START_STOP_BTN_PIN) && playBtnPushed) {
     playBtnPushed = false;
   }
@@ -324,6 +332,8 @@ void checkInputs() {
 void updateScreen() {
   display.clearDisplay();
 
+  lastInteractionTime = millis(); //not sure if it's a right place for this, but should do for now
+
   //Tabs
   display.drawRect(0, 0, 128, 2, SSD1306_WHITE);
   display.setCursor(0,2);