From a638a22dec6ca8982844d16017b86aafadfb01c2 Mon Sep 17 00:00:00 2001
From: holly sparkles <sparkles@holly.sh>
Date: Tue, 14 Mar 2017 05:29:15 +0100
Subject: [PATCH] Initial commit.

---
 README.md    |   0
 led_tube.ino | 108 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 108 insertions(+)
 create mode 100644 README.md
 create mode 100644 led_tube.ino

diff --git a/README.md b/README.md
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/README.md
diff --git a/led_tube.ino b/led_tube.ino
new file mode 100644
index 0000000..e56c210
--- /dev/null
+++ b/led_tube.ino
@@ -0,0 +1,108 @@
+const int dataPin = 2;
+const int clockPin = 4;
+const int latchPin = 3;
+
+unsigned char Digits[] = 
+{// 0   1    2    3  4  5    6    7  8  9    A    b  C    d    E    F    -
+  0xC0,0xF9,0xA4,0xB0,0x99,0x92,0x82,0xF8,0x80,0x90,0x8C,0xBF,0xC6,0xA1,0x86,0xFF,0xbf
+};
+unsigned char DigitCells[4];
+
+unsigned long previousMillis = 0;
+const long interval = 1000;           
+
+void setup() {
+  // put your setup code here, to run once:
+  pinMode(latchPin, OUTPUT);
+  pinMode(clockPin, OUTPUT);
+  pinMode(dataPin, OUTPUT);
+
+}
+
+int max_minutes = 10;
+int current_num = 0;
+
+void loop() {
+
+unsigned long currentMillis = millis();
+
+  if (currentMillis - previousMillis >= interval) {
+    // save the last time you blinked the LED
+    previousMillis = currentMillis;
+      
+      int seconds = current_num % 60;
+      int minutes = current_num / 60;
+
+      if (minutes > max_minutes)
+      {
+        current_num = 0;
+        seconds = current_num % 60;
+      }
+      
+      DigitCells[0] = seconds % 10;
+      DigitCells[1] = seconds / 10 % 10;
+      DigitCells[2] = minutes % 10;
+      DigitCells[3] = minutes / 10 % 10;
+    
+      current_num++;
+
+  }
+
+      Display_Digits();
+      
+}
+
+//http://edi.wang/post/2016/4/29/windows-10-iot-74hc595-led-digital-tube
+void Display_Digits()
+    {
+      unsigned char *led_table;
+      unsigned char i;
+      
+      led_table = Digits + DigitCells[0];
+      i = *led_table;
+      Digit_Write(i);     
+      Digit_Write(0x01);    
+      digitalWrite(latchPin,LOW);
+      digitalWrite(latchPin,HIGH);
+
+      led_table = Digits + DigitCells[1];
+      i = *led_table;
+      Digit_Write(i);   
+      Digit_Write(0x02);    
+      digitalWrite(latchPin,LOW);
+      digitalWrite(latchPin,HIGH);
+      
+      led_table = Digits + DigitCells[2];
+      i = *led_table;
+      Digit_Write(i);     
+      Digit_Write(0x04);  
+      digitalWrite(latchPin,LOW);
+      digitalWrite(latchPin,HIGH);
+      
+
+      led_table = Digits + DigitCells[3];
+      i = *led_table;
+      Digit_Write(i);     
+      Digit_Write(0x08);    
+      digitalWrite(latchPin,LOW);
+      digitalWrite(latchPin,HIGH);
+    }
+
+    void Digit_Write(unsigned char X)
+    {
+      unsigned char i;
+      for(i=8;i>=1;i--)
+      {
+        if (X&0x80) 
+        {
+          digitalWrite(dataPin,HIGH);
+         }  
+        else 
+        {
+          digitalWrite(dataPin,LOW);
+        }
+        X<<=1;
+        digitalWrite(clockPin,LOW);
+        digitalWrite(clockPin,HIGH);
+      }
+    }
--
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