Start arduino part

macroboard.ino

@@ -0,0 +1,71 @@
+/// ----------------------------------------------------------------
+/// ----------------------- Type Definitions -----------------------
+/// ----------------------------------------------------------------
+
+enum State {
+  WaitingForInput,
+  WaitingForAck,
+};
+
+
+
+/// ----------------------------------------------------------------
+/// ----------------------- Board Specifics ------------------------
+/// ----------------------------------------------------------------
+
+const int pin_count = 8;
+
+const byte pins[pin_count] = {
+  2, 3, 4, 5, 6, 7, 8, 9
+};
+
+const char message_start = '<';
+const char message_end = '>';
+
+
+
+/// ----------------------------------------------------------------
+/// -------------------------- Variables ---------------------------
+/// ----------------------------------------------------------------
+
+State current_state;
+
+
+
+/// ----------------------------------------------------------------
+/// --------------------------- Startup ----------------------------
+/// ----------------------------------------------------------------
+
+void setup() {
+  // enable serial port, with 9600 Baud
+  Serial.begin(9600);
+
+  // setup variables
+  current_state = WaitingForInput;
+
+  // setup pins
+  for (byte i = 0; i < pin_count; i++) {
+    pinMode(pins[i], INPUT);
+  }
+}
+
+void loop() {
+  // check for possible input
+  if (current_state == WaitingForInput) {
+    for (byte i = 0; i < pin_count; i++) {
+      check_pin(pins[i], i);
+    }
+  }
+}
+
+void check_pin(byte pin, byte index) {
+  if (digitalRead(pin) == HIGH) {
+    // assemble message
+    Serial.print(message_start);
+    Serial.print(index + 1);
+    Serial.print(message_end);
+
+    // force new line
+    Serial.print('\n');    
+  }
+}