Add MIDI panic function

purrChestrion-arduino/gfx.h

@@ -63,4 +63,13 @@ const unsigned char savetorom [] PROGMEM = {
 	0x00, 0x05, 0x55, 0x54, 0x00, 0x0f, 0xff, 0xfe, 0x01, 0x0c, 0x00, 0x02, 0x01, 0x8c, 0x00, 0x02, 
 	0x01, 0xcd, 0x89, 0xb2, 0xbf, 0xed, 0x55, 0x54, 0x5f, 0xed, 0x95, 0x14, 0x01, 0xcd, 0x49, 0x12, 
 	0x01, 0x8c, 0x00, 0x02, 0x01, 0x0c, 0x00, 0x02, 0x00, 0x0f, 0xff, 0xfe, 0x00, 0x05, 0x55, 0x54
+};
+
+// 'panic', 32x12px
+#define ICONPANIC_WIDTH 32
+#define ICONPANIC_HEIGHT 12
+const unsigned char iconpanic [] PROGMEM = {
+	0xff, 0xff, 0xff, 0xff, 0x80, 0x00, 0x00, 0x01, 0x8e, 0x38, 0xc9, 0x4d, 0x91, 0x25, 0x29, 0x51, 
+	0xa4, 0xa5, 0x2d, 0x51, 0xa4, 0xb9, 0xed, 0x51, 0xa0, 0xa1, 0x2b, 0x51, 0xa4, 0xa1, 0x2b, 0x51, 
+	0x91, 0x21, 0x29, 0x51, 0x8e, 0x21, 0x29, 0x4d, 0x80, 0x00, 0x00, 0x01, 0xff, 0xff, 0xff, 0xff
 };

purrChestrion-arduino/purrChestrion-arduino.ino

@@ -1,6 +1,7 @@
-#define FW_VER 1.01
+#define FW_VER 1.02
 #define USE_OLED true // OLED displays
 #define USE_ENCODER true
+#define USE_PANIC true
 #define EEPROM_MIDI_CHANNEL_ADDR 0 // Address to save MIDI channel in EEPROM
 
 // include libraries
@@ -25,13 +26,18 @@
   int lastClk = HIGH;
 #endif
 
+#if USE_PANIC
+  #define PANIC_BUTTON 4
+  bool midiPanic = false;
+#endif
+
 unsigned long lastChannelChangeTime = 0;
 bool channelChanged = false;
 const unsigned long saveDelay = 2000; // 2 seconds
 
 bool showSavedMessage = false;
 unsigned long savedMessageStart = 0;
-const unsigned long savedMessageDuration = 3000; // 1 second
+const unsigned long savedMessageDuration = 3000; // 3 seconds
 
 // Instantiate libraries
 Adafruit_MCP23X17 mcp1; // First MCP23017
@@ -112,6 +118,12 @@ void updateOLED() {
     oled.drawBitmap(88, 0, savetorom, SAVETOROM_WIDTH, SAVETOROM_HEIGHT, 1);
   }
 
+  #if USE_PANIC
+  if (midiPanic) {
+    oled.drawBitmap(1, 0, iconpanic, ICONPANIC_WIDTH, ICONPANIC_HEIGHT, 1);
+  }
+  #endif
+
   oled.display();
 #endif
 }
@@ -148,6 +160,84 @@ void checkEncoder() {
 }
 
 
+void handleNoteOn(byte channel, byte pitch, byte velocity) {
+  #if USE_PANIC
+  if (midiPanic) return;  // suppress all notes during panic
+  #endif
+
+  if (currentMidiChannel == MIDI_CHANNEL_OMNI || channel == currentMidiChannel) {
+
+    if (pitch >= 57 && pitch <= 88) {
+      MCPOutput out = noteToMCP[pitch - 57];
+      if (out.chip == 0) {
+        mcp1.digitalWrite(out.pin, HIGH);
+      } else if (out.chip == 1) {
+        mcp2.digitalWrite(out.pin, HIGH);
+      }
+   }
+  }
+
+  // Flash LED on Note On
+  digitalWrite(LED_BUILTIN, HIGH);
+  ledOnTime = millis();
+  ledActive = true;
+}
+
+void handleNoteOff(byte channel, byte pitch, byte velocity) {
+  #if USE_PANIC
+  if (midiPanic) return;  // suppress all notes during panic
+  #endif
+
+  if (currentMidiChannel == MIDI_CHANNEL_OMNI || channel == currentMidiChannel) {
+    if (pitch >= 57 && pitch <= 88) {
+      MCPOutput out = noteToMCP[pitch - 57];
+      if (out.chip == 0) {
+        mcp1.digitalWrite(out.pin, LOW);
+      } else if (out.chip == 1) {
+        mcp2.digitalWrite(out.pin, LOW);
+      }
+   }
+  }
+}
+
+void checkMidiPanic() {
+  #if USE_PANIC
+  static bool lastButtonState = HIGH;
+  static unsigned long lastToggleTime = 0;
+  const unsigned long debounceDelay = 50;
+
+  bool currentButtonState = digitalRead(PANIC_BUTTON);
+
+  if (lastButtonState == HIGH && currentButtonState == LOW) {
+    unsigned long now = millis();
+    if (now - lastToggleTime > debounceDelay) {
+      midiPanic = !midiPanic;
+      lastToggleTime = now;
+
+      if (midiPanic) {
+        // Turn off all notes immediately
+        for (int i = 0; i < 32; i++) {
+          if (noteToMCP[i].chip == 0) {
+            mcp1.digitalWrite(noteToMCP[i].pin, LOW);
+          } else {
+            mcp2.digitalWrite(noteToMCP[i].pin, LOW);
+          }
+        }
+      }
+
+      #if USE_OLED
+        updateOLED();  // Only update display when state changes
+      #endif
+    }
+  }
+
+  lastButtonState = currentButtonState;
+  #endif
+}
+
+
+
+
 void setup() {
   // Validate saved midi channel in EEPROM
   if (savedChannel <= 16) {
@@ -175,6 +265,10 @@ void setup() {
     pinMode(ENCODER_CLK, INPUT_PULLUP);
     pinMode(ENCODER_DT, INPUT_PULLUP);
   #endif
+
+  #if USE_PANIC
+    pinMode(PANIC_BUTTON, INPUT_PULLUP);
+  #endif
   // Midi Activity LED on Pin 13 (aka LED_BUILTIN)
   pinMode(LED_BUILTIN, OUTPUT);
 
@@ -196,12 +290,18 @@ void setup() {
   updateOLED();
 }
 
+
+
 void loop() {
   MIDI.read();
 
   #if USE_ENCODER
     checkEncoder();
   #endif
+
+  #if USE_PANIC
+    checkMidiPanic();
+  #endif
   
   // Save channel if change timeout has passed
   if (channelChanged && (millis() - lastChannelChangeTime >= saveDelay)) {
@@ -228,37 +328,4 @@ void loop() {
     digitalWrite(LED_BUILTIN, LOW);
     ledActive = false;
   }
-}
-
-
-void handleNoteOn(byte channel, byte pitch, byte velocity) {
-  if (currentMidiChannel == MIDI_CHANNEL_OMNI || channel == currentMidiChannel) {
-
-    if (pitch >= 57 && pitch <= 88) {
-      MCPOutput out = noteToMCP[pitch - 57];
-      if (out.chip == 0) {
-        mcp1.digitalWrite(out.pin, HIGH);
-      } else if (out.chip == 1) {
-        mcp2.digitalWrite(out.pin, HIGH);
-      }
-   }
-  }
-
-  // Flash LED on Note On
-  digitalWrite(LED_BUILTIN, HIGH);
-  ledOnTime = millis();
-  ledActive = true;
-}
-
-void handleNoteOff(byte channel, byte pitch, byte velocity) {
-  if (currentMidiChannel == MIDI_CHANNEL_OMNI || channel == currentMidiChannel) {
-    if (pitch >= 57 && pitch <= 88) {
-      MCPOutput out = noteToMCP[pitch - 57];
-      if (out.chip == 0) {
-        mcp1.digitalWrite(out.pin, LOW);
-      } else if (out.chip == 1) {
-        mcp2.digitalWrite(out.pin, LOW);
-      }
-   }
-  }
 }