Now you can adjust pitch and intonation

.clang-format

@@ -0,0 +1,3 @@
+BasedOnStyle: Chromium
+ColumnLimit: 0
+PointerAlignment: Right

fingering.h

@@ -6,8 +6,10 @@ struct Fingering {
   bool alt;  // Alternate fingering: sounds more choked
 };
 
-#define n(note) {note, false}
+#define n(note) \
-#define P(note) {note, true}
+  { note, false }
+#define P(note) \
+  { note, true }
 
 #define CCCC n(NOTE_CS5), n(NOTE_CS5), n(NOTE_CS5), n(NOTE_CS5)
 #define CCDD n(NOTE_CS5), n(NOTE_CS5), n(NOTE_D5), n(NOTE_D5)

pipe.cpp

@@ -1,6 +1,6 @@
 #include "pipe.h"
-#include "tuning.h"
 #include "fingering.h"
+#include "tuning.h"
 
 // Kludge time: this is something I did just to make my breadboard look nicer.
 #define KEY_OFFSET 2

pipe.h

@@ -1,9 +1,9 @@
 #pragma once
 
-#include <stdint.h>
-#include <SparkFun_Qwiic_Button.h>
 #include <Adafruit_MPR121.h>
+#include <SparkFun_Qwiic_Button.h>
 #include <paj7620.h>
+#include <stdint.h>
 #include "tuning.h"
 
 class Pipe {

tuning.cpp

@@ -2,9 +2,6 @@
 
 #include <math.h>
 
-// 12th root of 2, used for Twelvetone Equal Temperament
-#define TET_CONST 1.059463
-
 Tuning::Tuning(Note base, float pitch, TuningSystem system) {
   Setup(base, pitch, system);
 }
@@ -14,18 +11,20 @@ Tuning::Tuning(Note base, float pitch) {
 
 // I like just Intonation.
 Tuning::Tuning() {
-#if 0
   Tuning(NOTE_D4, PITCH_CONCERT_D4, TUNINGSYSTEM_JUST);
-#endif
 }
 
-Note Tuning::GetBaseNote() { return baseNote; }
+Note Tuning::GetBaseNote() {
+  return baseNote;
+}
 
 void Tuning::SetTuningSystem(TuningSystem system) {
   Setup(baseNote, GetPitch(baseNote), system);
 }
 
-TuningSystem Tuning::GetSystem() { return system; }
+TuningSystem Tuning::GetTuningSystem() {
+  return system;
+}
 
 // setupOctaves computes the entire tuning frequency chart.
 //
@@ -53,7 +52,7 @@ void Tuning::setupOctaves(Note base) {
 void Tuning::setupEqual(Note base, float pitch) {
   pitches[base] = pitch;
   for (int i = 1; i < 12; i++) {
-    pitches[base + i] = pitches[base + i - 1] * TET_CONST;
+    pitches[base + i] = pitches[base + i - 1] * TET_SEMITONE_MULTIPLIER;
   }
 }
 
@@ -95,17 +94,43 @@ void Tuning::Setup(Note base, float pitch, TuningSystem system) {
   setupOctaves(base);
 }
 
-void Tuning::Setup(Note base, float pitch) { Setup(base, pitch, system); }
+void Tuning::Setup(Note base, float pitch) {
+  Setup(base, pitch, system);
+}
 
-float Tuning::GetPitch(Note note) { return pitches[note]; }
+float Tuning::GetPitch(Note note) {
+  return pitches[note];
+}
 
 Note NearestNote(float pitch) {
-  return Note(round(log2(pitch / PITCH_CONCERT_C0)));
+  return Note(round(log(pitch / PITCH_CONCERT_C0) / log(TET_SEMITONE_MULTIPLIER)));
 }
 
 const char *noteNames[]{
-    "C ", "C#", "D ", "Eb", "E ", "F ", "F#", "G ", "Ab", "A ", "Bb", "B ",
+    "C",
+    "C#",
+    "D",
+    "Eb",
+    "E",
+    "F",
+    "F#",
+    "G",
+    "Ab",
+    "A",
+    "Bb",
+    "B",
 };
 
-const char *NoteName(Note note) { return noteNames[note % 12]; }
+const char *NoteName(Note note) {
+  return noteNames[note % 12];
+}
 
+const char *TuningSystemName(TuningSystem system) {
+  switch (system) {
+    case TUNINGSYSTEM_EQUAL:
+      return "Equal";
+    case TUNINGSYSTEM_JUST:
+    default:
+      return "Just";
+  }
+}

tuning.h

@@ -4,19 +4,118 @@
 enum TuningSystem {
   TUNINGSYSTEM_JUST,
   TUNINGSYSTEM_EQUAL,
+  TUNINGSYSTEM_MAX = TUNINGSYSTEM_EQUAL,
 };
-#define TUNINGSYSTEM_MAX TUNINGSYSTEM_EQUAL
 
 enum Note {
-  NOTE_C0, NOTE_CS0, NOTE_D0, NOTE_DS0, NOTE_E0, NOTE_F0, NOTE_FS0, NOTE_G0, NOTE_GS0, NOTE_A0, NOTE_AS0, NOTE_B0,
+  NOTE_C0,
-  NOTE_C1, NOTE_CS1, NOTE_D1, NOTE_DS1, NOTE_E1, NOTE_F1, NOTE_FS1, NOTE_G1, NOTE_GS1, NOTE_A1, NOTE_AS1, NOTE_B1,
+  NOTE_CS0,
-  NOTE_C2, NOTE_CS2, NOTE_D2, NOTE_DS2, NOTE_E2, NOTE_F2, NOTE_FS2, NOTE_G2, NOTE_GS2, NOTE_A2, NOTE_AS2, NOTE_B2,
+  NOTE_D0,
-  NOTE_C3, NOTE_CS3, NOTE_D3, NOTE_DS3, NOTE_E3, NOTE_F3, NOTE_FS3, NOTE_G3, NOTE_GS3, NOTE_A3, NOTE_AS3, NOTE_B3,
+  NOTE_DS0,
-  NOTE_C4, NOTE_CS4, NOTE_D4, NOTE_DS4, NOTE_E4, NOTE_F4, NOTE_FS4, NOTE_G4, NOTE_GS4, NOTE_A4, NOTE_AS4, NOTE_B4,
+  NOTE_E0,
-  NOTE_C5, NOTE_CS5, NOTE_D5, NOTE_DS5, NOTE_E5, NOTE_F5, NOTE_FS5, NOTE_G5, NOTE_GS5, NOTE_A5, NOTE_AS5, NOTE_B5,
+  NOTE_F0,
-  NOTE_C6, NOTE_CS6, NOTE_D6, NOTE_DS6, NOTE_E6, NOTE_F6, NOTE_FS6, NOTE_G6, NOTE_GS6, NOTE_A6, NOTE_AS6, NOTE_B6,
+  NOTE_FS0,
-  NOTE_C7, NOTE_CS7, NOTE_D7, NOTE_DS7, NOTE_E7, NOTE_F7, NOTE_FS7, NOTE_G7, NOTE_GS7, NOTE_A7, NOTE_AS7, NOTE_B7,
+  NOTE_G0,
-  NOTE_C8, NOTE_CS8, NOTE_D8, NOTE_DS8, NOTE_E8, NOTE_F8, NOTE_FS8, NOTE_G8, NOTE_GS8, NOTE_A8, NOTE_AS8, NOTE_B8,
+  NOTE_GS0,
+  NOTE_A0,
+  NOTE_AS0,
+  NOTE_B0,
+  NOTE_C1,
+  NOTE_CS1,
+  NOTE_D1,
+  NOTE_DS1,
+  NOTE_E1,
+  NOTE_F1,
+  NOTE_FS1,
+  NOTE_G1,
+  NOTE_GS1,
+  NOTE_A1,
+  NOTE_AS1,
+  NOTE_B1,
+  NOTE_C2,
+  NOTE_CS2,
+  NOTE_D2,
+  NOTE_DS2,
+  NOTE_E2,
+  NOTE_F2,
+  NOTE_FS2,
+  NOTE_G2,
+  NOTE_GS2,
+  NOTE_A2,
+  NOTE_AS2,
+  NOTE_B2,
+  NOTE_C3,
+  NOTE_CS3,
+  NOTE_D3,
+  NOTE_DS3,
+  NOTE_E3,
+  NOTE_F3,
+  NOTE_FS3,
+  NOTE_G3,
+  NOTE_GS3,
+  NOTE_A3,
+  NOTE_AS3,
+  NOTE_B3,
+  NOTE_C4,
+  NOTE_CS4,
+  NOTE_D4,
+  NOTE_DS4,
+  NOTE_E4,
+  NOTE_F4,
+  NOTE_FS4,
+  NOTE_G4,
+  NOTE_GS4,
+  NOTE_A4,
+  NOTE_AS4,
+  NOTE_B4,
+  NOTE_C5,
+  NOTE_CS5,
+  NOTE_D5,
+  NOTE_DS5,
+  NOTE_E5,
+  NOTE_F5,
+  NOTE_FS5,
+  NOTE_G5,
+  NOTE_GS5,
+  NOTE_A5,
+  NOTE_AS5,
+  NOTE_B5,
+  NOTE_C6,
+  NOTE_CS6,
+  NOTE_D6,
+  NOTE_DS6,
+  NOTE_E6,
+  NOTE_F6,
+  NOTE_FS6,
+  NOTE_G6,
+  NOTE_GS6,
+  NOTE_A6,
+  NOTE_AS6,
+  NOTE_B6,
+  NOTE_C7,
+  NOTE_CS7,
+  NOTE_D7,
+  NOTE_DS7,
+  NOTE_E7,
+  NOTE_F7,
+  NOTE_FS7,
+  NOTE_G7,
+  NOTE_GS7,
+  NOTE_A7,
+  NOTE_AS7,
+  NOTE_B7,
+  NOTE_C8,
+  NOTE_CS8,
+  NOTE_D8,
+  NOTE_DS8,
+  NOTE_E8,
+  NOTE_F8,
+  NOTE_FS8,
+  NOTE_G8,
+  NOTE_GS8,
+  NOTE_A8,
+  NOTE_AS8,
+  NOTE_B8,
   NOTE_ZERO = 0,
   NOTE_SEMITONE = 1,
   NOTE_WHOLETONE = 2,
@@ -28,6 +127,13 @@ enum Note {
 #define PITCH_CONCERT_A4 440.00
 #define PITCH_CONCERT_D4 293.66
 
+// Twelvetone Equal Temperament semitone multiplier
+// Take any frequency and multiply it by this magic number to get a semitone higher!
+// Divide to get a semitone lower!
+// This is an approximation of exp(2, 1/12),
+// which was worked out in around the 1500s.
+#define TET_SEMITONE_MULTIPLIER 1.059463
+
 class Tuning {
  public:
   // name contains the name of the current tuning system
@@ -39,7 +145,7 @@ public:
   void Setup(Note base, float pitch, TuningSystem system);
   void Setup(Note base, float pitch);
   void SetTuningSystem(TuningSystem system);
-    TuningSystem GetSystem();
+  TuningSystem GetTuningSystem();
   Note GetBaseNote();
   float GetPitch(Note note);
 
@@ -56,9 +162,11 @@ private:
 // NearestNote returns the note nearest to pitch.
 Note NearestNote(float pitch);
 
-// NoteName return the name of a note (without octave).
+// NoteName returns the name of a note (without octave).
 const char *NoteName(Note note);
 
+// TuningSystemName returns the name of a tuning system.
+const char *TuningSystemName(TuningSystem system);
 
 // Make notes support some arithmetic
 inline Note toNote(int a) {
@@ -97,3 +205,7 @@ inline int operator/(const Note a, const int b) {
 inline int operator/(const Note a, const Note b) {
   return int(a) / b;
 }
+
+inline TuningSystem operator++(TuningSystem &a) {
+  return a = TuningSystem((int(a) + 1) % int(TUNINGSYSTEM_MAX + 1));
+}

uilleann.ino

@@ -3,7 +3,6 @@
 #include <Adafruit_SSD1306.h>
 #include <Audio.h>
 #include <Fonts/FreeSans9pt7b.h>
-#include <SparkFun_Qwiic_Button.h>
 #include <Wire.h>
 #include <paj7620.h>
 #include <stdio.h>
@@ -22,14 +21,12 @@ Pipe pipe;
 Tuning tuning = Tuning(NOTE_D4, PITCH_CONCERT_D4, TUNINGSYSTEM_JUST);
 
 Adafruit_SSD1306 display(128, 32, &Wire, -1);
-int currentPatch = 0;
 
 // Settings
-uint8_t intonation = 0;
-int16_t pitchAdjust = 0;
 uint8_t patch[4] = {0};
 float volume[4] = {0};
 const char *settingNames[4] = {"c", "r", "d", "*"};
+const char *buildDate = __DATE__;
 
 // Pipes
 FMVoice Chanter;
@@ -109,7 +106,7 @@ void diag(const char *fmt, ...) {
   display.setTextSize(1);
 
   display.setCursor(56, 24);
-  display.print(__DATE__);
+  display.print(buildDate);
 
 #if 0
   display.setCursor(0, 16);
@@ -171,8 +168,7 @@ void setup() {
   // Turn on drones
   for (int i = 0; i < 3; i++) {
     Note note = NOTE_D4 - (NOTE_OCTAVE * i);
-    float pitch =
+    float pitch = tuning.GetPitch(note) * (0.01 * (i - 1));  // Detune just a touch
-        tuning.GetPitch(note) * (0.01 * (i - 1));  // Detune just a touch
     Drones[i].LoadPatch(&Bank[0]);
     Drones[i].NoteOn(pitch);
   }
@@ -187,25 +183,22 @@ void setup() {
 }
 
 void loop() {
+  static bool forceDisplayUpdate = true;
+
   pipe.Update();
-  diag("loop %d", millis());
 
 #if defined(ADAFRUIT_TRELLIS_M4_EXPRESS)
   trellis.tick();
-
-  trellis.setPixelColor(1, trellis.ColorHSV(millis(), 255, 120));
-  {
-    uint16_t color = trellis.ColorHSV(64 * pipe.kneeClosedness, 255, 120);
-    trellis.setPixelColor(0, color);
-  }
 #endif
 
   // If we're infinitely (for the sensor) off the knee,
   // go into setup mode!
   if (pipe.kneeClosedness == 0) {
     doSetup();
+    forceDisplayUpdate = true;
   } else {
-    doPlay();
+    doPlay(forceDisplayUpdate);
+    forceDisplayUpdate = false;
   }
 }
 
@@ -225,12 +218,21 @@ void loop() {
  *
  */
 void doSetup() {
+  static unsigned long quietUntil = 0;
+
+  // Stuff can set quietUntil to stop responding to keys for a bit
+#define quiet() quietUntil = millis() + 200
+  if (millis() < quietUntil) {
+    return;
+  }
+
   display.clearDisplay();
 
   bool alt = pipe.Pressed(7);
 
   // Draw indicator bar
   display.fillRect(126, 0, 2, 32, SSD1306_WHITE);
+  display.setFont(0);
   display.setTextSize(1);
   display.setCursor(0, 0);
 
@@ -238,7 +240,7 @@ void doSetup() {
     // Show settings for each of Chanter, Regulators, Drones
     for (int i = 0; i < 3; i++) {
       int p = patch[i];
-      int16_t x = 0;
+      int16_t x = 1;
       int16_t y = i * 8;
 
       display.setCursor(x, y);
@@ -265,31 +267,71 @@ void doSetup() {
       display.print(Bank[p].name);
     }
   } else {
-    if (pipe.Pressed(6)) {
-      float freq = PITCH_CONCERT_D4 + pitchAdjust;
-      Note note = NearestNote(freq);
 
-      display.setCursor(0, 0);
+    if (pipe.Pressed(6)) {
+      TuningSystem system = tuning.GetTuningSystem();
+      float freq = tuning.GetPitch(NOTE_D4);
+      Note note = NearestNote(freq);
+      int octave = int(note) / 12;
+
+      if (pipe.JustPressed(3) || pipe.JustPressed(2)) {
+        tuning.Setup(NOTE_A4, PITCH_CONCERT_A4, TUNINGSYSTEM_EQUAL);
+        if (pipe.Pressed(3) && pipe.Pressed(2)) {
+          ++system;
+        } else if (pipe.Pressed(3)) {
+          freq = tuning.GetPitch(++note);
+        } else if (pipe.Pressed(2)) {
+          freq = tuning.GetPitch(--note);
+        }
+        tuning.Setup(NOTE_D4, freq, system);
+      }
+
+      if (pipe.Pressed(1) || pipe.Pressed(0)) {
+        if (pipe.Pressed(1) && pipe.Pressed(0)) {
+          freq = PITCH_CONCERT_D4;
+          quiet();
+        } else if (pipe.Pressed(1)) {
+          freq *= 1.001;
+        } else if (pipe.Pressed(0)) {
+          freq /= 1.001;
+        }
+        tuning.Setup(NOTE_D4, freq);
+        note = NearestNote(freq);
+      }
+
+      display.setFont(&FreeSans9pt7b);
+      display.setCursor(0, 12);
       display.print(NoteName(note));
-      display.setCursor(6 + 6, 0);
+      display.print(octave);
+      display.setCursor(48, 12);
       display.print(freq);
+
+      display.setCursor(0, 27);
+      display.print(TuningSystemName(system));
     } else if (pipe.Pressed(5)) {
       display.print("fn2");
     } else if (pipe.Pressed(4)) {
       display.print("fn3");
     } else {
-      display.setCursor(56, 8);
+      display.setFont(&FreeSans9pt7b);
-      display.setTextSize(2);
+      display.setCursor(64, 18);
       display.print("Setup");
+
+      display.setFont();
+      display.setTextSize(1);
+      display.setCursor(0, 16);
+      display.print("build");
+      display.setCursor(0, 24);
+      display.print(buildDate);
     }
   }
 
   display.display();
 }
 
-void doPlay() {
+void doPlay(bool forceUpdate) {
   static uint8_t last_note = 0;
-  bool updateDisplay = false;
+  bool updateDisplay = forceUpdate;
 
   if (pipe.silent) {
     Chanter.NoteOff();
@@ -332,19 +374,16 @@ void doPlay() {
 
   if (updateDisplay) {
     display.clearDisplay();
+    display.setFont(&FreeSans9pt7b);
+
+    if (Chanter.patch) {
+      display.setCursor(0, 32);
+      display.print(Chanter.patch->name);
+    }
 
     display.setCursor(0, 16);
-    display.setTextSize(2);
-    display.print(Chanter.patch->name);
-
-    display.setCursor(0, 0);
-    display.setTextSize(2);
     display.print(note_name);
 
-    display.setCursor(40, 0);
-    display.setTextSize(1);
-    display.print(pipe.kneeClosedness);
-
     display.display();
     last_note = pipe.note;
   }