1 files changed, 48 insertions, 10 deletions
diff --git a/libraries/LiquidCrystal/examples/HelloWorld/HelloWorld.pde b/libraries/LiquidCrystal/examples/HelloWorld/HelloWorld.pde
index 2f244d0..76cd746 100644
--- a/libraries/LiquidCrystal/examples/HelloWorld/HelloWorld.pde
+++ b/libraries/LiquidCrystal/examples/HelloWorld/HelloWorld.pde
@@ -1,18 +1,56 @@
+/*
+  LiquidCrystal Library - Hello World
+ 
+ Demonstrates the use a 16x2 LCD display.  The LiquidCrystal
+ library works with all LCD displays that are compatible with the 
+ Hitachi HD44780 driver. There are many of them out there, and you
+ can usually tell them by the 16-pin interface.
+ 
+ This sketch prints "Hello World!" to the LCD
+ and shows the time.
+ 
+  The circuit:
+ * LCD RS pin to digital pin 12
+ * LCD Enable pin to digital pin 11
+ * LCD D4 pin to digital pin 5
+ * LCD D5 pin to digital pin 4
+ * LCD D6 pin to digital pin 3
+ * LCD D7 pin to digital pin 2
+ * 10K resistor:
+ * ends to +5V and ground
+ * wiper to LCD VO pin (pin 3)
+ 
+ Library originally added 18 Apr 2008
+ by David A. Mellis
+ library modified 5 Jul 2009
+ by Limor Fried (http://www.ladyada.net)
+ example added 9 Jul 2009
+ by Tom Igoe
+ modified 25 July 2009
+ by David A. Mellis
+ 
+ 
+ http://www.arduino.cc/en/Tutorial/LiquidCrystal
+ */
+
+// include the library code:
 #include <LiquidCrystal.h>
 
-// LiquidCrystal display with:
-// rs on pin 12
-// rw on pin 11
-// enable on pin 10
-// d4, d5, d6, d7 on pins 5, 4, 3, 2
-LiquidCrystal lcd(12, 11, 10, 5, 4, 3, 2);
+// initialize the library with the numbers of the interface pins
+LiquidCrystal lcd(12, 11, 5, 4, 3, 2);
 
-void setup()
-{
+void setup() {
+  // set up the LCD's number of rows and columns: 
+  lcd.begin(16, 2);
   // Print a message to the LCD.
   lcd.print("hello, world!");
 }
 
-void loop()
-{
+void loop() {
+  // set the cursor to column 0, line 1
+  // (note: line 1 is the second row, since counting begins with 0):
+  lcd.setCursor(0, 1);
+  // print the number of seconds since reset:
+  lcd.print(millis()/1000);
 }
+