From a319e70d06d946b81a2ba3d10d5a9a08e426de1a Mon Sep 17 00:00:00 2001
From: KaraBun <bl4ckholebun@gmail.com>
Date: Thu, 22 Dec 2022 15:37:01 -0500
Subject: [PATCH] Added Debounce timers and logic.

---
 Lanes.ino | 40 ++++++++++++++++++++++++++++++++++------
 1 file changed, 34 insertions(+), 6 deletions(-)

diff --git a/Lanes.ino b/Lanes.ino
index c5d04d2..03da2c9 100644
--- a/Lanes.ino
+++ b/Lanes.ino
@@ -12,6 +12,7 @@ const int Enc1Btn = 16; //Encoder 1 Button
 const int Enc2Btn = 17; //Encoder 2 Button
 const int ClockIn = 4; //Clock In
 const int ClockDetect = 7; //Detect clock jack
+const int DebounceTime = 10;  //Debounce time in ms
 
 Encoder LeftEnc( Enc1P1, Enc1P2);
 Encoder RightEnc( Enc2P1, Enc2P2);
@@ -21,7 +22,8 @@ int E2 = 0;
 bool E1Btn = false;
 bool E2Btn = false;
 bool ClockState = false;
-bool E1Prev, E2Prev, CDPrev = false;
+bool E1Prev, E2Prev, CDPrev, E1Click, E2Click, CDIn = false;
+unsigned int E1Bounce, E2Bounce, CDBounce = 0;
 unsigned long ClockPrev = 0;
 byte Input = 0;
 int PpQN = 24;
@@ -56,7 +58,7 @@ void setup() {
   ClockState = digitalRead(ClockIn);
   CDPrev = digitalRead(ClockDetect);
 
-  //Clear the Lanes
+  //Initialize the Lanes
   for(int i = 0; i < 16; i++){
     Lane1[0][i] = random(0, 96);
     Lane1[1][i] = random(0, 255);
@@ -75,28 +77,46 @@ void setup() {
   analogWrite( Lane1Pin, Lane1[1][0]);
   analogWrite( Lane2Pin, Lane2[1][0]);
   analogWrite( Lane3Pin, Lane3[1][0]);
+
+  // Timer0 is already used for millis() - we'll just interrupt somewhere
+  // in the middle and call the "Compare A" function below
+  OCR0A = 0xAF;
+  TIMSK0 |= _BV(OCIE0A);
+
 }
 
 void loop() {
 
-    //delay(1);
 
     long newLEnc = LeftEnc.read();
     long newREnc = RightEnc.read();
 
     if (digitalRead(Enc1Btn) != E1Btn){
+      if (E1Bounce == 0 & E1Click == false){
       Serial.println("E1Btn State Change");
       E1Btn = !E1Btn;
+      E1Bounce = DebounceTime;
+      E1Click = true;
+      }
     }
 
     if (digitalRead(Enc2Btn) != E2Btn){
+      if (E2Bounce == 0 & E2Click == false){
       Serial.println("E2Btn State Change");
       E2Btn = !E2Btn;
+      E2Bounce = DebounceTime;
+      E1Click = true;
+      }
     }
 
-    if (digitalRead(ClockDetect) != CDPrev){
-      Serial.println("Clock Detect Change");
-      CDPrev = !CDPrev;
+    bool newCD = digitalRead(ClockDetect);
+
+    if (newCD != CDPrev){
+      if (CDBounce == 0){
+      Serial.println("Clock Jack Status Change");
+      CDPrev = CDIn = newCD;
+      CDBounce = DebounceTime << 4;
+      }
     }
 
     if ( digitalRead(ClockIn) != ClockState){
@@ -167,4 +187,12 @@ void loop() {
       Lane3Time = ClockTime;
       analogWrite(Lane3Pin, Lane3[1][Lane3Pos]);
     }
+}
+
+// Interrupt is called once a millisecond, 
+SIGNAL(TIMER0_COMPA_vect) 
+{
+  E1Bounce = (E1Bounce - 1) & 0b10000000;
+  E2Bounce = (E2Bounce - 1) & 0b10000000;
+  CDBounce = (CDBounce - 1) & 0b10000000;
 }
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