[+] Firmware

taiko/src/main.cpp

@@ -0,0 +1,65 @@
+#include <Arduino.h>
+
+#define val const auto
+#define let auto
+
+/**
+ * Since the arduino library doesn't have printf, we have to make our own
+ */
+void send(const char* format, ...)
+{
+    char buffer[512];
+    va_list args;
+    va_start(args, format);
+    vsnprintf(buffer, sizeof(buffer), format, args);
+    va_end(args);
+    Serial.println(buffer);
+}
+
+const int NUM_DRUMSTICKS = 2;
+const int DRUMSTICK_PINS[] = {A0, A1};
+int LAST_VALUES[] = {0, 0};
+
+// Values range from 0 to 1023, but since we reduced the resolution to 8 bits, we need to divide by 8
+// After the division, values range from 0 to 127
+val threshold = (int) (0.7 * 127);
+
+void setup()
+{
+    Serial.begin(115200);
+    for (val pin: DRUMSTICK_PINS) pinMode(pin, INPUT);
+
+    send("Initialized");
+}
+
+void loop()
+{
+    // Loop through all the pins, indexed
+    for (let i = 0; i < NUM_DRUMSTICKS; i++)
+    {
+        val pin = DRUMSTICK_PINS[i];
+        val value = analogRead(pin) / 8;
+
+        // If the value is different from the last value, update it
+        if (value != LAST_VALUES[i])
+        {
+            // If it's less than the threshold
+            if (value < threshold)
+            {
+                // If the last value was greater than the threshold, it means the drumstick was just hit
+                if (LAST_VALUES[i] > threshold)
+                    send("Hit:+%d", i);
+            }
+            else
+            {
+                send(";%d;%d", i, value);
+
+                // If the last value was less than the threshold, it means the drumstick was just released
+                if (LAST_VALUES[i] < threshold)
+                    send("Hit:-%d", i);
+            }
+        }
+        
+        LAST_VALUES[i] = value;
+    }
+}