Support for CV box/CV board (compile option). Match idle CV from PWM breath CV on A6 to direct output idle voltage from breath sensor (so any of them can be used for CV box without need for recalibration of box). Added reading and ignoring incoming USB MIDI messages to prevent buffers from getting filled up blocking outgoing messages.

NuEVI/NuEVI.ino

@@ -25,7 +25,7 @@ PROGRAMME FUNCTION:   EVI Wind Controller using the Freescale MP3V5004GP breath
 
 // Compile options, comment/uncomment to change
 
-#define FIRMWARE_VERSION "1.3.4"    // FIRMWARE VERSION NUMBER HERE <<<<<<<<<<<<<<<<<<<<<<<
+#define FIRMWARE_VERSION "1.3.5"    // FIRMWARE VERSION NUMBER HERE <<<<<<<<<<<<<<<<<<<<<<<
 
 
 //#define CASSIDY
@@ -128,7 +128,7 @@ PROGRAMME FUNCTION:   EVI Wind Controller using the Freescale MP3V5004GP breath
 #define OCTAVE_FACTORY 3    // 3 is 0 octave change
 #define CTOUCH_THR_FACTORY 125  // MPR121 touch threshold
 #define BREATHCURVE_FACTORY 4 // 0 to 12 (-4 to +4, S1 to S4)
-#define VEL_SMP_DL_FACTORY 20 // 0 to 30 ms in steps of 5
+#define VEL_SMP_DL_FACTORY 15 // 0 to 30
 #define VEL_BIAS_FACTORY 0  // 0 to 9
 #define PINKY_KEY_FACTORY 12 // 0 - 11 (QuickTranspose -12 to -1), 12 (pb/2), 13 - 22 (QuickTranspose +1 to +12)
 #define DIPSW_BITS_FACTORY 0 // virtual dip switch settings for special modes (work in progress)
@@ -190,8 +190,8 @@ byte gateOpen = 0; // setting for gate always open, note on sent for every time
 
 int breathLoLimit = 0;
 int breathHiLimit = 4095;
-int portamLoLimit = 1000;
+int portamLoLimit = 700;
-int portamHiLimit = 5000;
+int portamHiLimit = 4700;
 int pitchbLoLimit = 500;
 int pitchbHiLimit = 4000;
 int extracLoLimit = 500;
@@ -277,6 +277,10 @@ int biteSensor=0;    // capacitance data from bite sensor, for midi cc and thres
 byte portIsOn=0;     // keep track and make sure we send CC with 0 value when off threshold
 int oldport=0;
 int lastBite=0;
+byte biteJumper=0;
+
+int cvPitch;
+int targetPitch;
 
 int exSensor=0;
 byte extracIsOn=0;
@@ -363,6 +367,7 @@ void setup() {
 
   analogReadResolution(12);   // set resolution of ADCs to 12 bit
   analogWriteResolution(12);
+  analogWriteFrequency(pwmDacPin,11718.75);
 
   pinMode(dPin, INPUT_PULLUP);
   pinMode(ePin, INPUT_PULLUP);
@@ -503,6 +508,11 @@ void setup() {
   
   initDisplay(); //Start up display and show logo
 
+  biteJumper = !digitalRead(biteJumperPin);
+  if (biteJumper){
+    pinMode(bitePin, INPUT);
+  }
+
   //auto-calibrate the vibrato threshold while showing splash screen
   vibZero = breathCalZero = 0;
   const int sampleCount = 4;
@@ -570,42 +580,55 @@ void loop() {
       mainState = RISE_WAIT; // Go to next state
     }
     if (legacy || legacyBrAct) {
+      #if defined(CASSIDY)
+      if (((pbUp > ((pitchbMaxVal + pitchbThrVal) / 2)) && (pbDn > ((pitchbMaxVal + pitchbThrVal) / 2)) && legacy) ||
+          ((analogRead(0) < breathCalZero - 900) && legacyBrAct)) { // both pb pads touched or br suck
+      #else
       if (((pbUp > ((pitchbMaxVal + pitchbThrVal) / 2)) && (pbDn > ((pitchbMaxVal + pitchbThrVal) / 2)) && legacy) ||
           ((analogRead(0) < breathCalZero - 800) && legacyBrAct && (pbUp > (pitchbMaxVal + pitchbThrVal) / 2) && (pbDn < (pitchbMaxVal + pitchbThrVal) / 2))) { // both pb pads touched or br suck
+      #endif  
         readSwitches();
         fingeredNoteUntransposed = patchLimit(fingeredNoteUntransposed + 1);
         if (exSensor >= ((extracThrVal + extracMaxVal) / 2)) { // instant midi setting     
           if ((fingeredNoteUntransposed >= 73) && (fingeredNoteUntransposed <= 88)) {
             MIDIchannel = fingeredNoteUntransposed - 72; // Mid C and up 
+            #if !defined(CASSIDY)
             digitalWrite(statusLedPin, LOW);
             delay(150);
             digitalWrite(statusLedPin, HIGH);
+            #endif
           }
         } else {
           if (!pinkyKey) { // note number to patch number
             if (patch != fingeredNoteUntransposed) {
               patch = fingeredNoteUntransposed;
               doPatchUpdate = 1;
+              #if !defined(CASSIDY)
               digitalWrite(statusLedPin, LOW);
               delay(150);
               digitalWrite(statusLedPin, HIGH);
+              #endif
             }
           } else { // hi and lo patch numbers
             if (fingeredNoteUntransposed > 75) {
               if (patch != patchLimit(fingeredNoteUntransposed + 24)) {
                 patch = patchLimit(fingeredNoteUntransposed + 24); // add 24 to get high numbers 108 to 127
                 doPatchUpdate = 1;
+                #if !defined(CASSIDY)
                 digitalWrite(statusLedPin, LOW);
                 delay(150);
                 digitalWrite(statusLedPin, HIGH);
+                #endif
               }
             } else {
               if (patch != patchLimit(fingeredNoteUntransposed - 36)) {
                 patch = patchLimit(fingeredNoteUntransposed - 36); // subtract 36 to get low numbers 0 to 36
                 doPatchUpdate = 1;
+                #if !defined(CASSIDY)
                 digitalWrite(statusLedPin, LOW);
                 delay(150);
                 digitalWrite(statusLedPin, HIGH);
+                #endif
               }
             }
           }
@@ -929,12 +952,29 @@ void loop() {
   }
   lastFingering = fingeredNote;
   #if defined(CVSCALEBOARD) // pitch CV from DAC and breath CV from PWM on pin 6, for filtering and scaling on separate board
-    analogWrite(dacPin,constrain((fingeredNote-24)*42+map(pitchBend,0,16383,-84,84),0,4095));
+    targetPitch = (fingeredNote-24)*42;
-    analogWrite(pwmDacPin,breathCurve(map(constrain(pressureSensor,breathThrVal,breathMaxVal),breathThrVal,breathMaxVal,0,4095)));
+    if (portIsOn){
+      if (targetPitch > cvPitch){
+        cvPitch += 1+(127-oldport)/4;
+        if (cvPitch > targetPitch) cvPitch = targetPitch;
+      } else if (targetPitch < cvPitch){
+        cvPitch -= 1+(127-oldport)/4;
+        if (cvPitch < targetPitch) cvPitch = targetPitch;
+      } else {
+        cvPitch = targetPitch;
+      }
+    } else {
+      cvPitch = targetPitch;
+    }
+    analogWrite(dacPin,constrain(cvPitch+map(pitchBend,0,16383,-84,84),0,4095));
+    analogWrite(pwmDacPin,breathCurve(map(constrain(pressureSensor,breathThrVal,breathMaxVal),breathThrVal,breathMaxVal,500,4095))); //starting at 0.6V to match use of cv from sensor, so recalibration of cv offset/scaler is not needed
   #else // else breath CV on DAC pin, directly to unused pin of MIDI DIN jack
     analogWrite(dacPin,breathCurve(map(constrain(pressureSensor,breathThrVal,breathMaxVal),breathThrVal,breathMaxVal,0,4095)));
   #endif
-  
+
+  while (usbMIDI.read()) {
+    // read & ignore incoming messages
+  }
   //do menu stuff
   menu();
 }
@@ -1306,10 +1346,10 @@ void extraController() {
 
 void portamento_() {
   // Portamento is controlled with the bite sensor (variable capacitor) in the mouthpiece
-  if (digitalRead(biteJumperPin)){ //PBITE (if pulled low with jumper, use pressure sensor on A7)
+  if (biteJumper){ //PBITE (if pulled low with jumper, use pressure sensor on A7)
-    biteSensor=touchRead(bitePin);     // get sensor data, do some smoothing - SENSOR PIN 17 - PCB PINS LABELED "BITE" (GND left, sensor pin right)
+    biteSensor=analogRead(A7); // alternative kind bite sensor (air pressure tube and sensor)  PBITE 
    } else { 
-    biteSensor=analogRead(A7); // alternative kind bite sensor (air pressure tube and sensor)  PBITE  
+    biteSensor=touchRead(bitePin);     // get sensor data, do some smoothing - SENSOR PIN 17 - PCB PINS LABELED "BITE" (GND left, sensor pin right) 
    }
   if (portamento && (biteSensor >= portamThrVal)) { // if we are enabled and over the threshold, send portamento
     if (!portIsOn) {

NuEVI/menu.ino

@@ -146,6 +146,10 @@ void showVersion() {
   display.setCursor(0,0);
   display.print("BC");
   #endif
+  #if defined(CVSCALEBOARD)
+  display.setCursor(15,0);
+  display.print("CV");
+  #endif
   display.setCursor(85,52);
   display.print("v.");
   display.println(FIRMWARE_VERSION);
@@ -3634,6 +3638,10 @@ void drawSensorPixels(){
       display.display();
     }
     lastBite=biteSensor;
+    /*if (biteJumper){
+      pos = map(constrain(analogRead(bitePin),900,1400), 900, 1400, 28, 118);
+      display.drawPixel(pos, 40, WHITE);
+    }*/
   }
   if ((state == PITCHB_ADJ_IDL) || (state == PITCHB_ADJ_THR) || (state == PITCHB_ADJ_MAX)){
     pos = map(constrain(pbUp, pitchbLoLimit, pitchbHiLimit), pitchbLoLimit, pitchbHiLimit, 28, 118);