From 829246c33252ccb7beb830cc8948a320218a3129 Mon Sep 17 00:00:00 2001
From: Dejvino <dejvino@gmail.com>
Date: Tue, 28 Mar 2023 15:11:50 +0200
Subject: [PATCH] Responding like crazy

---
 terminal_keyboard_emulator.ino | 85 ++++++++++++++++++++++++++++++++++
 1 file changed, 85 insertions(+)
 create mode 100644 terminal_keyboard_emulator.ino

diff --git a/terminal_keyboard_emulator.ino b/terminal_keyboard_emulator.ino
new file mode 100644
index 0000000..987123c
--- /dev/null
+++ b/terminal_keyboard_emulator.ino
@@ -0,0 +1,85 @@
+#include <TimerOne.h>
+
+const int pinData = 6;
+const int pinStatus = 7;
+
+void setup(void)
+{
+  pinMode(pinData, OUTPUT);
+  //Timer1.initialize(60);
+  //Timer1.attachInterrupt(clockCycle);
+
+  Timer1.initialize(1100/2);
+  Timer1.attachInterrupt(clockCycle);
+  Timer1.stop();
+    
+  pinMode(pinStatus, INPUT_PULLUP);
+  attachInterrupt(digitalPinToInterrupt(pinStatus), statusCycle, CHANGE);
+  
+  Serial.begin(9600);
+}
+
+volatile long lastChange = 0;
+volatile long lastStart = 0;
+volatile int x = 0;
+volatile int dataWord = 0;
+volatile int dataState = 0;
+volatile int dataDelay = 0;
+volatile int clkState = LOW;
+
+void statusCycle() {
+  long timeNow = millis();
+  long changeDiff = timeNow - lastChange;
+  lastChange = timeNow;
+  if (changeDiff >= 10) {
+    lastStart = timeNow;
+
+    dataWord = (' ' + x);
+    dataState = 8;
+    dataDelay = 0;
+    x = (x + 1) % 100; 
+    clkState = HIGH;
+    Timer1.start();
+  }
+  if (timeNow - lastStart >= 7 && changeDiff >= 2) {
+    //dataWord = 0b1000000011 | (('A' + x) << 2);
+    
+  }
+}
+
+void clockCycle(void)
+{
+  if (clkState == LOW) {
+    clkState = HIGH;
+    //digitalWrite(pinData, (dataState > 0) ? LOW : HIGH);
+  } else {
+    clkState = LOW;
+    if (dataDelay > 0) {
+      dataDelay--;
+    } else if (dataState > 0) {
+      int bitToSend = (dataWord >> (dataState - 1)) & 1;
+      //digitalWrite(pinData, bitToSend ? LOW : HIGH);
+      dataState--;
+      if (dataState <= 0) {
+        Timer1.stop();
+      }
+    } else {
+      //digitalWrite(pinData, HIGH);
+    }
+  }
+  if (dataDelay <= 0 && dataState > 0)
+    digitalWrite(pinData, clkState);
+    else
+    digitalWrite(pinData, HIGH);
+}
+
+void loop(void)
+{
+  delay(500);
+  
+  /*noInterrupts();
+  dataWord = 0b1000000011 | (('A' + x) << 2);
+  dataState = 16;
+  x = (x + 1) % 30;
+  interrupts();*/
+}