First merger attempt

terminal_keyboard_emulator.ino

@@ -1,27 +1,39 @@
+// Resources:
+// [Consul 262.4 Converter] https://deskthority.net/viewtopic.php?t=26908
+// [Consul 262.5 manual in CS] http://www.sapi.cz/prislusenstvi/c262-5.php#odkazp4
+
 #include <TimerOne.h>
 
-// config:
+// pinout config
 const int pinData = 6;
 const int pinStatus = 7;
+const int clockPin = 5;
+const int dataPin = 3;
+const int outPin = 4;
+const int speakerPin = 6;
 
-// fixed values 
-const int timerDelay = 530;
+// constant config
+const int slaveClockDivider = 16;
+const int timerDelay = 530 / slaveClockDivider;
 
-void setup(void)
-{
-  pinMode(pinData, OUTPUT);
-  digitalWrite(pinData, HIGH);
+// variables
+volatile int slaveClockStep = 0;
+char m[255];
+volatile int data = 0;
+int test = 0;
+volatile int counter = 0;
+int numbits = 10;
 
-  Timer1.initialize(timerDelay);
-  Timer1.attachInterrupt(clockCycle);
-  Timer1.stop();
-    
-  pinMode(pinStatus, INPUT_PULLUP);
-  attachInterrupt(digitalPinToInterrupt(pinStatus), statusCycle, CHANGE);
-  
-  Serial.begin(9600);
-}
+// MODS >>>
+// [1] send debug scancode information to serial port
+bool modConsoleLog = true;
+// [2] play speaker sounds of keys
+bool modKeySounds = true;
+// <<< MODS
 
+// ----------
+// KBD Output
+// ----------
 volatile long lastChange = 0;
 volatile int x = 0;
 volatile int dataWord = 0;
@@ -34,25 +46,21 @@ volatile bool nextKeyReady = false;
 volatile byte nextKey = 0;
 
 void typeKey(byte key) {
-    //noInterrupts();
     nextKey = key;
     nextKeyReady = true;
-    //interrupts();
 }
     
 void sendKey(byte key) { 
-    //noInterrupts();
     dataWord = key;
     dataState = 8;
     dataDelay = 0;
     packetDelay = 0;
     packetTail = 15;
-    //interrupts();
-    Timer1.initialize(timerDelay);
-    Timer1.start();
+    //Timer1.initialize(timerDelay);
+    //Timer1.start();
 }
 
-void statusCycle() {
+void onHostStatusChange() {
   long timeNow = millis();
   long changeDiff = timeNow - lastChange;
   lastChange = timeNow;
@@ -62,7 +70,7 @@ void statusCycle() {
   }
 }
 
-void clockCycle(void)
+void onHostClockCycle(void)
 {
   int dataBit = HIGH;
   if (packetDelay > 0) {
@@ -78,22 +86,150 @@ void clockCycle(void)
     packetTail--;
     dataBit = LOW;
   } else {
-    Timer1.stop();
+    //Timer1.stop();
   }
   digitalWrite(pinData, dataBit);
 }
-int xx = 0;
+
+// ---------
+// KBD Input
+// ---------
+const int receivingSteps = 16;
+volatile int clockStep = 0;
+volatile int receivingStep = 0;
+volatile int receivingData = 0;
+volatile int receivingBit = 0;
+
+void onSlaveClockInterrupt() {
+  clockStep = (clockStep + 1) % 2;
+  int clockValue = (clockStep % 2)  ? HIGH : LOW;
+  digitalWrite(clockPin, clockValue);
+  int dataBit = digitalRead(dataPin);
+  if (clockValue == LOW) {
+    if (receivingData == 0 && dataBit == LOW) {
+      receivingData = 1;
+      receivingStep = 0;
+      receivingBit = 0;
+      test = 0;
+      digitalWrite(outPin, HIGH);
+    } else if (receivingData == 1) {
+      receivingStep++;
+      digitalWrite(outPin, HIGH);
+    }
+    if (receivingData == 1 && test == 0) {
+      test = 1;
+      receivingBit += dataBit  == HIGH ? 1 : 0;
+      if (receivingStep >= receivingSteps) {
+        if (counter <= 8) {
+          data = data >> 1;
+          if (receivingBit > receivingSteps / 2) {
+            bitSet(data, 7);
+          }
+        }
+        counter++;
+        receivingStep = 0;
+        receivingBit = 0;
+          digitalWrite(outPin, LOW);
+        if (counter >= numbits) {
+          receivingData = 0;
+        }  
+      }
+    }
+  }
+  if (clockValue == HIGH && test == 1) {
+    test = 0;
+  }
+}
+
+void setupKeyMapping() {
+}
+
+char translateKeyToChar(int key) {
+  if (sizeof(m) <= key) {
+    return 0;
+  }
+  return m[key];
+}
+
+void printChar(char keyChar) {
+  Serial.print("'"); Serial.print(keyChar); Serial.print("' (");  Serial.print(int(keyChar)); Serial.println(")");
+}
+
+void processKbdByte(int data) {
+  int key = data;
+  if (modConsoleLog) {
+    Serial.print("Key: <"); Serial.print(int(key)); Serial.print("> ");
+  }
+  char keyChar = translateKeyToChar(key);
+
+  #ifdef KEYBOARD
+  Keyboard.press(keyChar);
+  delay(10);
+  Keyboard.release(keyChar);
+  #endif
+    
+  if (modConsoleLog) {
+    Serial.print("Press: ");
+    printChar(keyChar);
+  }
+}
+
+// ----------------------
+// Input and Output Merge
+// ----------------------
+void onTimerInterrupt()
+{
+  onSlaveClockInterrupt();
+
+  slaveClockStep = (slaveClockStep + 1) % slaveClockDivider;
+  if (slaveClockStep == 0) {
+      onHostClockCycle();
+  }
+}
+
+// ----
+// Main
+// ----
+void setup(void)
+{
+  Serial.begin(9600);
+  
+  setupKeyMapping();
+  
+  pinMode(pinData, OUTPUT);
+  pinMode(dataPin, INPUT);
+  pinMode(outPin, OUTPUT);
+  pinMode(clockPin, OUTPUT);
+  pinMode(pinStatus, INPUT_PULLUP);
+
+  digitalWrite(pinData, HIGH);
+  digitalWrite(outPin, LOW);
+
+  attachInterrupt(digitalPinToInterrupt(pinStatus), onHostStatusChange, CHANGE);
+  
+  Timer1.initialize(timerDelay);
+  Timer1.attachInterrupt(onTimerInterrupt);
+  //Timer1.stop();
+
+  Serial.println("Keyboard ready");
+  tone(speakerPin, 80, 50);
+}
+
 void loop(void)
 {
-  delay(500);
-  typeKey(44 + xx);
-  xx = (xx+1) % 20;
-
-  /*if (!nextKeyReady && Serial.available() > 0) {
+  // type key from serial
+  if (!nextKeyReady && Serial.available() > 0) {
       long key = Serial.parseInt(SKIP_ALL);
       if (key != 0) {
 	typeKey(key);
       }
-  }*/
+  }
+  // type key from keyboard
+  if (counter >= numbits) {
+    processKbdByte(data);
+    if (modKeySounds) tone(speakerPin, 60 + int(data), 25);
+    data = B0;
+    counter = 0;
+  }
 }