Add MONSTER M4SK voice changer

Author: PaintYourDragon

M4_Eyes/M4_Eyes.ino

@@ -149,6 +149,7 @@ void setup() {
   seesaw.analogWrite(SEESAW_BACKLIGHT_PIN, 0);
   // Configure Seesaw pins 9,10,11 as inputs
   seesaw.pinModeBulk(0b111000000000, INPUT_PULLUP);
+  uint32_t initialButtonState = seesaw.digitalReadBulk(0b111000000000);
 #endif
 
   if(i == 1)      fatal("Flash init fail", 100);
@@ -261,7 +262,21 @@ void setup() {
 
   // LOAD CONFIGURATION FILE -----------------------------------------------
 
-  loadConfig("config.eye");
+  // No file selector yet. In the meantime, you can override the default
+  // config file by holding one of the 3 edge buttons at startup (loads
+  // config1.eye, config2.eye or config3.eye instead). Keep fingers clear
+  // of the nose booper when doing this...it self-calibrates on startup.
+  char *filename = "config.eye";
+#if NUM_EYES > 1 // Only available on MONSTER M4SK
+  if(!(initialButtonState & 0b001000000000)) {
+    filename = "config1.eye";
+  } else if(!(initialButtonState & 0b010000000000)) {
+    filename = "config2.eye";
+  } else if(!(initialButtonState & 0b100000000000)) {
+    filename = "config3.eye";
+  }
+#endif
+  loadConfig(filename);
 
   // LOAD EYELIDS AND TEXTURE MAPS -----------------------------------------
 

MonsterMaskVoiceChanger/MonsterMaskVoiceChanger.ino

@@ -0,0 +1,69 @@
+// Basic voice changer code. This version is specific to the Adafruit
+// MONSTER M4SK board using a PDM microphone. Connect an amplified speaker
+// or headphones to the M4SK audio jack. "Inner" button raises pitch,
+// "outer" button lowers pitch, center button resets pitch to 1:1.
+// SCREENS ARE OFF BY DEFAULT. THIS IS NORMAL.
+
+#include <Adafruit_seesaw.h>
+
+// The code in this file just sets up seesaw and handles button presses.
+// All the voice-handling stuff is in the other tab, accessed through
+// these functions and variables:
+extern bool              voiceSetup(void);
+extern float             voicePitch(float p);
+extern void              voiceGain(float g);
+extern volatile uint16_t voiceLastReading;
+
+Adafruit_seesaw seesaw;
+#define SEESAW_BACKLIGHT_PIN 5 // Left eye TFT backlight
+#define BACKLIGHT_PIN       21 // Right eye TFT backlight
+#define SPEAKER_ENABLE_PIN  20 // Set LOW to enable speaker out
+
+// Crude error handler. Prints message to Serial Monitor, blinks LED.
+static void fatal(const char *message, uint16_t blinkDelay) {
+  Serial.println(message);
+  for(bool ledState = HIGH;; ledState = !ledState) {
+    digitalWrite(LED_BUILTIN, ledState);
+    delay(blinkDelay);
+  }
+}
+
+void setup() {
+  pinMode(SPEAKER_ENABLE_PIN, OUTPUT);
+  digitalWrite(SPEAKER_ENABLE_PIN, HIGH); // Speaker OFF
+
+  Serial.begin(115200);
+  //while(!Serial);
+
+  // Screens off for now, not used by this sketch
+  pinMode(BACKLIGHT_PIN, OUTPUT);
+  analogWrite(BACKLIGHT_PIN, 0);
+  if(!seesaw.begin()) fatal("Seesaw init fail", 1000);
+  seesaw.analogWrite(SEESAW_BACKLIGHT_PIN, 0);
+
+  if(!voiceSetup()) fatal("Voice init fail", 250);
+  digitalWrite(SPEAKER_ENABLE_PIN, LOW); // Speaker on
+
+  // Configure Seesaw pins 9,10,11 as inputs
+  seesaw.pinModeBulk(0b111000000000, INPUT_PULLUP);
+}
+
+static float pitch = 1.0;
+
+void loop() {
+  uint32_t buttonState = seesaw.digitalReadBulk(0b111000000000);
+  if((buttonState & 0b111000000000) != 0b111000000000) {
+    if(       !(buttonState & 0b001000000000)) { // Seesaw pin 9
+      Serial.println("Higher");
+      pitch = voicePitch(pitch * 1.1);
+    } else if(!(buttonState & 0b010000000000)) { // Seesaw pin 10
+      Serial.println("1:1");
+      pitch = voicePitch(1.0);
+    } else if(!(buttonState & 0b100000000000)) { // Seesaw pin 11
+      Serial.println("Lower");
+      pitch = voicePitch(pitch * 0.9);
+    }
+    Serial.println(pitch);
+    while(seesaw.digitalReadBulk(0b111000000000) != 0b111000000000);
+  }
+}