Commented LCD examples.

2 files changed, 21 insertions, 0 deletions

diff --git a/libraries/LiquidCrystal/examples/HelloWorld/HelloWorld.pde b/libraries/LiquidCrystal/examples/HelloWorld/HelloWorld.pde
index f755d9c..438063f 100644
--- a/libraries/LiquidCrystal/examples/HelloWorld/HelloWorld.pde
+++ b/libraries/LiquidCrystal/examples/HelloWorld/HelloWorld.pde
@@ -1,9 +1,15 @@
 #include <LiquidCrystal.h>
 
+// LiquidCrystal display with:
+// rs on pin 12
+// rw on pin 11
+// enable on pin 10
+// d0, d1, d2, d3 on pins 5, 4, 3, 2
 LiquidCrystal lcd(12, 11, 10, 5, 4, 3, 2);
 
 void setup()
 {
+  // Print a message to the LCD.
   lcd.print("hello, world!");
 }
 
diff --git a/libraries/LiquidCrystal/examples/SerialDisplay/SerialDisplay.pde b/libraries/LiquidCrystal/examples/SerialDisplay/SerialDisplay.pde
index 6e4336c..940439e 100644
--- a/libraries/LiquidCrystal/examples/SerialDisplay/SerialDisplay.pde
+++ b/libraries/LiquidCrystal/examples/SerialDisplay/SerialDisplay.pde
@@ -1,5 +1,15 @@
+/*
+ * Displays text sent over the serial port (e.g. from the Serial Monitor) on
+ * an attached LCD.
+ */
+
 #include <LiquidCrystal.h>
 
+// LiquidCrystal display with:
+// rs on pin 12
+// rw on pin 11
+// enable on pin 10
+// d0, d1, d2, d3 on pins 5, 4, 3, 2
 LiquidCrystal lcd(12, 11, 10, 5, 4, 3, 2);
 
 void setup()
@@ -9,10 +19,15 @@ void setup()
 
 void loop()
 {
+  // when characters arrive over the serial port...
   if (Serial.available()) {
+    // wait a bit for the entire message to arrive
     delay(100);
+    // clear the screen
     lcd.clear();
+    // read all the available characters
     while (Serial.available() > 0) {
+      // display each character to the LCD
       lcd.write(Serial.read());
     }
   }