From 62e5e2e50b712c8df5876cdc8c6d7a8f065dc8dd Mon Sep 17 00:00:00 2001
From: Frank DeMarco <if.self.end@gmail.com>
Date: Wed, 27 Jun 2018 21:28:08 -0400
Subject: [PATCH] ino

---
 serial/serial.ino | 87 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 87 insertions(+)
 create mode 100644 serial/serial.ino

diff --git a/serial/serial.ino b/serial/serial.ino
new file mode 100644
index 0000000..b52b395
--- /dev/null
+++ b/serial/serial.ino
@@ -0,0 +1,87 @@
+// Generally, you should use "unsigned long" for variables that hold time
+// The value will quickly become too large for an int to store
+unsigned long previousMillis = 0;        // will store last time LED was updated
+
+// constants won't change:
+const long interval = 500;           // interval at which to blink (milliseconds)
+
+int pushButton1 = 2;
+int pushButton2 = 3;
+int pushButton3 = 4;
+int pushButton4 = 5;
+
+int buttons[4] = {pushButton1, pushButton2, pushButton3, pushButton4};
+
+
+void setup() {
+  // set the digital pin as output:
+  Serial.begin(9600);
+  pinMode(pushButton1, OUTPUT);
+  digitalWrite(pushButton1, LOW);
+  pinMode(pushButton2, INPUT_PULLUP);
+  pinMode(pushButton3, INPUT_PULLUP);
+  pinMode(pushButton4, INPUT_PULLUP);
+}
+
+void loop() {  
+  unsigned long currentMillis = millis();
+  bool received_input = false;
+  for (int ii = 0; ii < 4; ii++)
+  {
+    for (int jj = 0; jj < 4; jj++)
+    {
+      if (jj == ii)
+      {
+        pinMode(buttons[jj], OUTPUT);
+        digitalWrite(buttons[jj], LOW);  
+      }
+      else
+      {
+        pinMode(buttons[jj], INPUT_PULLUP);
+      }
+    }
+    for (int jj = ii; jj < 4; jj++)
+    {
+      if (!(ii == jj) && !digitalRead(buttons[jj]))
+      {
+        for (int kk = 3; kk >= 0; kk--)
+        {
+          if (kk == ii || kk == jj)
+          {
+            Serial.print(1);
+          }
+          else
+          {
+            Serial.print(0);
+          }
+        }
+        Serial.print("\n");
+        received_input = true;
+        break;
+      }
+    }
+    if (received_input)
+    {
+      break;
+    }
+  }
+
+  if (currentMillis - previousMillis >= interval)
+  {
+    previousMillis = currentMillis;
+//if(digitalRead(pushButton1)==0){
+//}
+    
+//if(digitalRead(pushButton2)==0){
+//  Serial.println("1-2");
+//}
+//if(digitalRead(pushButton3)==0){
+//  Serial.println("1-3");
+//}
+//if(digitalRead(pushButton4)==0){
+//  Serial.println("1-4");
+//}
+  }
+
+  
+}