MIDI updates

Author: tigoe

LICENSE

@@ -1,6 +1,6 @@
 MIT License
 
-Copyright (c) 2018 tigoe
+Copyright (c) 2018 Tom Igoe
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal

MIDI_examples/MIDIUSBJoystick/MIDIUSBJoystick.ino

@@ -24,7 +24,7 @@ int lastButtonState = LOW;
 
 void setup() {
   Serial.begin(9600);                  // initialize serial
-  pinMode(buttonPin, INPUT);
+  pinMode(buttonPin, INPUT_PULLUP);
 }
 
 void loop() {
@@ -53,7 +53,7 @@ void loop() {
   // button plays the note or stops it:
   if (buttonState != lastButtonState) {
     delay(5);     // debounce delay
-    if (button == HIGH) {
+    if (buttonState == LOW) {
       midiCommand(0x90, note, 127);
     } else {
       midiCommand(0x80, note, 0);
@@ -66,10 +66,11 @@ void loop() {
   Serial.print("\t");
   Serial.print(y);
   Serial.print("\t");
-  Serial.println(button);
+
+  Serial.println(buttonState);
   // when all else fails, turn everything off:
-  midiCommand(0xB0, 0x7B, 0x00);
-  MidiUSB.flush();
+//  midiCommand(0xB0, 0x7B, 0x00);
+//  MidiUSB.flush();
   // Serial.println("all notes off");
 }
 

MIDI_examples/Serial1_MIDI_oneKey_improviser/Serial1_MIDI_oneKey_improviser.ino

@@ -0,0 +1,78 @@
+/*
+  One-key piano MIDI player for MIDUSB
+
+  Generates a  MIDI notes when you push the button.
+  Randomizes the note within a scale each time
+
+  Uses MIDIUSB for MIDI, so will work on any
+  32U4-based board (e.g. Uno, Leonardo, Micro, Yún)
+
+  Circuit:
+      pushbutton attached to +Vcc from pin 5.
+      10-kilohm resistor to ground from pin 5
+
+  created 14 Jan 2019
+  by Tom Igoe
+*/
+#include <pitchToNote.h>
+
+// the intervals in a major and natural minor scale:
+int major[] = {2, 2, 1, 2, 2, 2, 1};
+int naturalMinor[] = {2, 1, 2, 2, 1, 2, 2};
+
+// an array to hold the final notes of the scale:
+int scale[8];
+
+// start with middle C:
+int tonic = pitchC4;
+// note to play:
+int noteValue = tonic;
+
+// previous state of the button:
+int lastButtonState = LOW;
+
+void setup() {
+    // initialize MIDI serial:
+  Serial1.begin(31250);
+  pinMode(5, INPUT);
+  // fill the scale array with the scale you want:
+  // start with the initial note:
+  scale[0] = tonic;
+  int note = scale[0];
+  // iterate over the intervals, adding each to the next note
+  // in the scale. You can change major to naturalMinor
+  // if you want that kind of scale instead:
+  for (int n = 0; n < 7; n++) {
+    note = note + major[n];
+    scale[n + 1] = note;
+  }
+}
+
+void loop() {
+  // read the pushbutton:
+  int buttonState = digitalRead(5);
+  // compare its state to the previous state:
+  if (buttonState != lastButtonState) {
+    // debounce delay:
+    delay(5);
+    // if the button's changed and it's pressed:
+    if (buttonState == HIGH) {
+      // pick a random note in the scale:
+      noteValue = scale[random(8)];
+      // play it:
+      midiCommand(0x90, noteValue, 0x7F);
+    } else  {
+      // turn the note off:
+      midiCommand(0x80, noteValue, 0);
+    }
+    // save the button state for comparison next time through:
+    lastButtonState = buttonState;
+  }
+}
+
+// send a 3-byte midi message
+void midiCommand(byte cmd, byte data1, byte  data2) {
+  Serial1.write(cmd);     // command byte (should be > 127)
+  Serial1.write(data1);   // data byte 1 (should be < 128)
+  Serial1.write(data2);   // data byte 2 (should be < 128)
+}

MIDI_examples/Serial1_MIDI_simple/Serial1_MIDI_simple.ino

@@ -9,15 +9,15 @@
 
   Circuit:
     connect TX of Serial1 to TX pin of MIDI jack
- 
+
   created 13 Feb 2017
   modified 13 Dec 2018
   by Tom Igoe
 */
 
 int bpm = 72;  // beats per minute
 // duration of a beat in ms
-float beatDuration = 60.0 / bpm * 1000;   
+float beatDuration = 60.0 / bpm * 1000;
 
 // the melody sequence:
 int melody[] = {64, 66, 71, 73, 74, 66, 64, 73, 71, 66, 74, 73};
@@ -34,12 +34,12 @@ void setup() {
 void loop() {
   // play a note from the melody:
   midiCommand(0x90, melody[thisNote], 127);
-  // all the notes in this are sixteenth notes, 
+  // all the notes in this are sixteenth notes,
   // which is 1/4 of a beat, so:
   int noteDuration = beatDuration / 4;
-    // keep it on for the appropriate duration:  delay(noteDuration);
+  // keep it on for the appropriate duration:  delay(noteDuration);
   // turn the note off:
-  midiCommand(0x80, melody[thisNote], 127);
+  midiCommand(0x90, melody[thisNote], 0);
   // increment the note number for next time through the loop:
   thisNote++;
   // keep the note in the range from 0 - 12 using modulo:
@@ -48,6 +48,11 @@ void loop() {
 
 // send a 3-byte midi message
 void midiCommand(byte cmd, byte data1, byte  data2) {
+  Serial.print(cmd, HEX);
+  Serial.print(" ");
+  Serial.print(data1, HEX);
+  Serial.print(" ");
+  Serial.println(data2, HEX);
   Serial1.write(cmd);     // command byte (should be > 127)
   Serial1.write(data1);   // data byte 1 (should be < 128)
   Serial1.write(data2);   // data byte 2 (should be < 128)