User interface - Online Offline LED and speaker

terminal_keyboard_emulator.ino

@@ -5,6 +5,9 @@
 #include <TimerOne.h>
 
 // pinout config
+const int pinLedOffline = 10; // out
+const int pinLedOnline = 9; // out
+const int pinSpeaker = 8; // out
 const int pinData = 6; // out, host data
 const int pinStatus = 7; // in, host status
 const int clockPin = 5; // out, kbd clock
@@ -22,6 +25,7 @@ volatile int data = 0;
 int test = 0;
 volatile int counter = 0;
 int numbits = 10;
+volatile int typedKey = -1;
 
 // MODS >>>
 // [1] send debug scancode information to serial port
@@ -31,7 +35,7 @@ bool modConsoleLog = true;
 // ----------
 // KBD Output
 // ----------
-volatile long lastChange = 0;
+volatile long lastChange = -100000;
 volatile int x = 0;
 volatile int dataWord = 0;
 volatile int dataState = 0;
@@ -54,6 +58,7 @@ void sendKey(byte key) {
     dataDelay = 0;
     packetDelay = 0;
     packetTail = 15;
+    typedKey = key;
     //Serial.print("Sending key "); Serial.println((int) key);
 }
 
@@ -365,6 +370,17 @@ void onTimerInterrupt()
   slaveClockStep = (slaveClockStep + 1) % slaveClockDivider;
 }
 
+// --------------
+// User Interface
+// --------------
+void updateOnlineLeds()
+{
+  long timeNow = millis();
+  bool online = (lastChange > timeNow) || ((timeNow - lastChange) < 10000);
+  digitalWrite(pinLedOffline, online ? LOW : HIGH);
+  digitalWrite(pinLedOnline, online ? HIGH : LOW);
+}
+
 // ----
 // Main
 // ----
@@ -374,12 +390,17 @@ void setup(void)
   
   setupKeyMapping();
   
+  pinMode(pinLedOffline, OUTPUT);
+  pinMode(pinLedOnline, OUTPUT);
+  pinMode(pinSpeaker, OUTPUT);
   pinMode(pinData, OUTPUT);
   pinMode(dataPin, INPUT);
   pinMode(outPin, OUTPUT);
   pinMode(clockPin, OUTPUT);
   pinMode(pinStatus, INPUT_PULLUP);
 
+  digitalWrite(pinLedOffline, HIGH);
+  digitalWrite(pinLedOnline, HIGH);
   digitalWrite(pinData, HIGH);
   digitalWrite(outPin, LOW);
 
@@ -388,6 +409,23 @@ void setup(void)
   Timer1.initialize(timerDelay);
   Timer1.attachInterrupt(onTimerInterrupt);
 
+  delay(500);
+  tone(pinSpeaker, 650, 200);
+  digitalWrite(pinLedOffline, LOW);
+  digitalWrite(pinLedOnline, HIGH);
+  delay(200);
+  tone(pinSpeaker, 500, 200);
+  digitalWrite(pinLedOffline, HIGH);
+  digitalWrite(pinLedOnline, LOW);
+  delay(200);
+  digitalWrite(pinLedOffline, LOW);
+  digitalWrite(pinLedOnline, LOW);
+  delay(500);
+
+  updateOnlineLeds();
+  tone(pinSpeaker, 440, 200);
+  delay(200);
+
   Serial.println("Keyboard ready");
 }
 
@@ -419,5 +457,13 @@ void loop(void)
   Serial.print("QWE "); Serial.println((int)k);
   if (qwe % 5 == 0) delay(2000);
   /**/
+
+  updateOnlineLeds();
+  if (typedKey != -1) {
+      tone(pinSpeaker, 200 + typedKey, 100);
+      typedKey = -1;
+  }
+
+  delay(5);
 }