Key typing over serial

terminal_keyboard_emulator.ino

@@ -10,6 +10,7 @@ const int timerDelay = 500;
 void setup(void)
 {
   pinMode(pinData, OUTPUT);
+  digitalWrite(pinData, HIGH);
   
   Timer1.initialize(timerDelay);
   Timer1.attachInterrupt(clockCycle);
@@ -28,22 +29,38 @@ volatile int dataState = 0;
 volatile int dataDelay = 0;
 volatile int packetDelay = 0;
 volatile int packetTail = 0;
-volatile int clkState = LOW;
+volatile int clkState = HIGH;
+
+volatile bool nextKeyReady = false;
+volatile byte nextKey = 0;
+
+void typeKey(byte key) {
+    noInterrupts();
+    nextKeyReady = true;
+    nextKey = key;
+    interrupts();
+}
+    
+void sendKey(byte key) { 
+    noInterrupts();
+    dataWord = key;
+    dataState = 8;
+    dataDelay = 0;
+    packetDelay = 0;
+    packetTail = 10;
+    clkState = HIGH;
+    interrupts();
+    Timer1.initialize(timerDelay);
+    Timer1.start();
+}
 
 void statusCycle() {
   long timeNow = millis();
   long changeDiff = timeNow - lastChange;
   lastChange = timeNow;
-  if (changeDiff >= 10) {
-    dataWord = (0 + x);
-    dataState = 8;
-    dataDelay = 0;
-    packetDelay = 0;
-    packetTail = 100;
-    x = (x + 1) % 8; 
-    clkState = HIGH;
-    Timer1.initialize(timerDelay);
-    Timer1.start();
+  if (changeDiff >= 10 && nextKeyReady) {
+      sendKey(nextKey);
+      nextKeyReady = false;
   }
 }
 
@@ -75,11 +92,13 @@ void clockCycle(void)
 
 void loop(void)
 {
-  delay(500);
+  delay(50);
 
-  /*noInterrupts();
-  dataWord = 0b1000000011 | (('A' + x) << 2);
-  dataState = 16;
-  x = (x + 1) % 30;
-  interrupts();*/
+  if (Serial.available() > 0) {
+      long key = Serial.parseInt(SKIP_ALL);
+      if (key != 0) {
+	typeKey(key);
+      }
+  }
 }
+