switched to from ms based to internal ppqn clock

software/GToE/GToE.ino

@@ -7,30 +7,35 @@
 
 #define SCREEN_ADDRESS 0x3C
 
+#define PPQN 24 //24 is good for triplets. each pulse is 1/512th note
+#define PULSE_LENGTH 5
+
 #define INPUT_CONNECTED_PIN 12
 #define INPUT_PIN 2
 #define ENC_BTN_PIN 17
 #define ENC_D1_PIN 4
 #define ENC_D2_PIN 3
 #define START_STOP_BTN_PIN 14
-//Output pins are defined in the array below
 
 int outsPins[6] = {5, 6, 7, 8, 9, 10};
 
-int outsValues[6] = {1, 2, 4, -4, 1, 1}; //positive - divide, negative - multiply, 0 - off
+
+int outsValues[6] = {1, 2, 4, -4, 0, 0}; //positive - divide, negative - multiply, 0 - off /2 /3 /4 /5 /6 /7 /8 /16 /32 /random x2 x3 x4 x6 x8 x12 x16 x24
 int outsPeriods[6];
-int outsClocksCounts[6] = {0, 0, 0, 0, 0, 0};
+int outsClocksCounts[6];
 
 bool clockMode;
 bool clockModeOld;
 int inputMode; //clock, reset, start/stop
 int clockCount = 0;
 
-int bpm = 120;
-int bpmPeriod;
-int bpmClockCount;
+int bpm = 127;
+int pulseClockCount = 0;
+int pulseCount = 0;
+int pulsePeriod;
 bool isPlaying = 0;
 int needToResetChannel;
+bool pulseCounted = false;
 
 int displayTab = 0;
 int displayTabOld;
@@ -71,40 +76,51 @@ void loop() {
 
 void internalClock() {
   if (isPlaying) {
-    for (int i = 0; i<6; i++) {
-      if (outsClocksCounts[i] >= outsPeriods[i]) {
-        outsClocksCounts[i] = 0;
+
+    //  pulse rules for dividers (multipliers should be in separate for loop, as this one occurs only on pulse 0 (bpm))
+    if (pulseCount == 0 && !pulseCounted) {
+      for (int i = 0; i<6; i++) {
+        if (outsValues[i] > 0) {            //Dividers (>0)      
+          if (outsClocksCounts[i] == 0) {   //Pulse on 0
+            digitalWrite(outsPins[i], HIGH);
+          }
+          if (outsClocksCounts[i] < (outsValues[i]-1)) {
+            outsClocksCounts[i]++;
+            if (i == 0) {Serial.println(outsClocksCounts[i]);}
+          } else {
+            outsClocksCounts[i] = 0;        
+          }
+        }
       }
-      if (outsClocksCounts[i] == 0) {
-        digitalWrite(outsPins[i], HIGH);
-      }
-      if (outsClocksCounts[i] == 15) {  //15ms pulse
+      pulseCounted = true;
+    }
+
+    //lets get internal pulse going
+    if (pulseClockCount == 0) {
+      pulseCount++;
+      pulseCounted = false;
+    }
+    if (pulseClockCount < pulsePeriod) {
+      pulseClockCount++;
+    } else {
+      pulseClockCount = 0;
+    }
+    if (pulseCount >= PPQN) {
+      pulseCount = 0;
+    }
+
+    // pull low all outputs after set pulse length
+    if (pulseClockCount >= PULSE_LENGTH) {
+      for (int i = 0; i<6; i++) { 
         digitalWrite(outsPins[i], LOW);
       }
-      outsClocksCounts[i]++;
-    }
-    if (bpmClockCount < bpmPeriod) {
-      bpmClockCount++;
-    } else {
-      bpmClockCount = 0;
-      if (needToResetChannel>=0) {
-        outsClocksCounts[needToResetChannel] = 0;
-        updatePeriods();
-        needToResetChannel = -1;
-      }
     }
+
   }
 }
 
 void updatePeriods() {
-  bpmPeriod = 60000 / bpm;
-  for (int i = 0; i<6; i++) {
-    if (outsValues[i]>0) {
-      outsPeriods[i] = bpmPeriod * outsValues[i];
-    } else {
-      outsPeriods[i] = bpmPeriod / outsValues[i] * - 1;      
-    }
-  }
+  pulsePeriod = 60000 / (bpm * PPQN);
 }
 
 void resetClocks() {
@@ -114,16 +130,18 @@ void resetClocks() {
 }
 
 void checkInputs() {
+
+  //input jack switcch
   clockMode = digitalRead(INPUT_CONNECTED_PIN);
   if (clockMode != clockModeOld) {
     updateScreen();
     clockModeOld = clockMode;
   }
+
+  //encoder button
   if (needToChangeTab == 0 && digitalRead(ENC_BTN_PIN) == 0) {
     needToChangeTab = 1;
-  }
-
-  if (needToChangeTab == 1 && digitalRead(ENC_BTN_PIN) == 1) {
+  } else if (needToChangeTab == 1 && digitalRead(ENC_BTN_PIN) == 1) {
     displayTabOld = displayTab;
     displayTab++;
     if (displayTab>6) {
@@ -133,6 +151,7 @@ void checkInputs() {
     updateScreen();
   }
 
+  //encoder
   encoder.tick();
   int encPosition = encoder.getPosition();
   if (encPositionOld != encPosition) {
@@ -147,6 +166,7 @@ void checkInputs() {
     encPositionOld = encPosition;
   }
 
+  //play button
   if (!digitalRead(START_STOP_BTN_PIN) && !buttonPushed) {
     isPlaying = !isPlaying;
     resetClocks();
@@ -163,7 +183,7 @@ void updateScreen() {
   display.setCursor(0,0);
   display.setTextSize(1);
   if (displayTab == 0) {
-    display.setTextColor(SSD1306_BLACK, SSD1306_WHITE);resetClocks();
+    display.setTextColor(SSD1306_BLACK, SSD1306_WHITE);
     display.print(F(" "));
     display.setTextColor(SSD1306_WHITE);
     display.print(F(" bpm "));
@@ -186,26 +206,26 @@ void updateScreen() {
       display.print(i);
     }
   }
-
   display.setTextColor(SSD1306_BLACK, SSD1306_WHITE);
   display.println(F("   "));
-
   display.println();
   
   //Content
   display.setTextSize(3);
   display.setTextColor(SSD1306_WHITE);
-
   if (displayTab == 0) {
     display.print(bpm);
     display.println(F("bpm")); 
   } else {
-     if (outsValues[displayTab-1]>0) {
+      if (outsValues[displayTab-1]==0) {
+        display.print(F("OFF"));
+      } else if (outsValues[displayTab-1]>0) {
         display.print(F("/"));
+        display.print(abs(outsValues[displayTab-1]));
       } else {
-        display.print(F("x"));  
+        display.print(F("x"));
+        display.print(abs(outsValues[displayTab-1]));
       }
-      display.print(abs(outsValues[displayTab-1]));
   }
 
   display.display();