Adding LiquidCrystal library.

libraries/LiquidCrystal/LiquidCrystal.cpp

@@ -0,0 +1,128 @@
+#include "LiquidCrystal.h"
+
+#include <stdio.h>
+#include <string.h>
+#include <inttypes.h>
+#include "WProgram.h"
+
+// When the display powers up, it is configured as follows:
+//
+// 1. Display clear
+// 2. Function set: 
+//    DL = 1; 8-bit interface data 
+//    N = 0; 1-line display 
+//    F = 0; 5x8 dot character font 
+// 3. Display on/off control: 
+//    D = 0; Display off 
+//    C = 0; Cursor off 
+//    B = 0; Blinking off 
+// 4. Entry mode set: 
+//    I/D = 1; Increment by 1 
+//    S = 0; No shift 
+//
+// Note, however, that resetting the Arduino doesn't reset the LCD, so we
+// can't assume that its in that state when a sketch starts (and the
+// LiquidCrystal constructor is called).
+
+LiquidCrystal::LiquidCrystal(uint8_t rs, uint8_t rw, uint8_t enable,
+  uint8_t d0, uint8_t d1, uint8_t d2, uint8_t d3,
+  uint8_t d4, uint8_t d5, uint8_t d6, uint8_t d7) : Print(baseWrite),
+  _four_bit_mode(0), _rs_pin(rs), _rw_pin(rw), _enable_pin(enable)
+{
+  _data_pins[0] = d0;
+  _data_pins[1] = d1;
+  _data_pins[2] = d2;
+  _data_pins[3] = d3; 
+  _data_pins[4] = d4;
+  _data_pins[5] = d5;
+  _data_pins[6] = d6;
+  _data_pins[7] = d7; 
+  
+  pinMode(_rs_pin, OUTPUT);
+  pinMode(_rw_pin, OUTPUT);
+  pinMode(_enable_pin, OUTPUT);
+  
+  for (int i = 0; i < 8; i++)
+    pinMode(_data_pins[i], OUTPUT);
+ 
+  command(0x38);  // function set: 8 bits, 1 line, 5x8 dots
+  command(0x0C);  // display control: turn display on, cursor off, no blinking
+  command(0x06);  // entry mode set: increment automatically, display shift, right shift
+  clear();
+}
+
+LiquidCrystal::LiquidCrystal(uint8_t rs, uint8_t rw, uint8_t enable,
+  uint8_t d0, uint8_t d1, uint8_t d2, uint8_t d3) : Print(baseWrite),
+  _four_bit_mode(1), _rs_pin(rs), _rw_pin(rw), _enable_pin(enable)
+{
+  _data_pins[0] = d0;
+  _data_pins[1] = d1;
+  _data_pins[2] = d2;
+  _data_pins[3] = d3; 
+  
+  pinMode(_rs_pin, OUTPUT);
+  pinMode(_rw_pin, OUTPUT);
+  pinMode(_enable_pin, OUTPUT);
+  
+  for (int i = 0; i < 4; i++)
+    pinMode(_data_pins[i], OUTPUT);
+ 
+  command(0x28);  // function set: 4 bits, 1 line, 5x8 dots
+  command(0x0C);  // display control: turn display on, cursor off, no blinking
+  command(0x06);  // entry mode set: increment automatically, display shift, right shift
+  clear();
+}
+
+void LiquidCrystal::clear()
+{
+  command(0x01);  // clear display, set cursor position to zero
+  delayMicroseconds(2000);
+}
+
+void LiquidCrystal::home()
+{
+  command(0x02);  // set cursor position to zero
+  delayMicroseconds(2000);
+}
+
+void LiquidCrystal::setCursor(int col, int row)
+{
+  int row_offsets[] = { 0x00, 0x40, 0x14, 0x54 };
+  command(0x80 | (col + row_offsets[row]));
+}
+
+void LiquidCrystal::command(int value) {
+  write(value, LOW);
+}
+
+void LiquidCrystal::write(int value, int mode) {
+  digitalWrite(_rs_pin, mode);
+  digitalWrite(_rw_pin, LOW);
+
+  if (_four_bit_mode) {
+    for (int i = 0; i < 4; i++) {
+      digitalWrite(_data_pins[i], (value >> (i + 4)) & 0x01);
+    }
+    
+    digitalWrite(_enable_pin, HIGH);
+    digitalWrite(_enable_pin, LOW);
+    
+    for (int i = 0; i < 4; i++) {
+      digitalWrite(_data_pins[i], (value >> i) & 0x01);
+    }
+
+    digitalWrite(_enable_pin, HIGH);
+    digitalWrite(_enable_pin, LOW);
+  } else {
+    for (int i = 0; i < 8; i++) {
+      digitalWrite(_data_pins[i], (value >> i) & 0x01);
+    }
+
+    digitalWrite(_enable_pin, HIGH);
+    digitalWrite(_enable_pin, LOW);
+  }
+}
+
+void baseWrite(uint8_t value, void *instance) {
+  ((LiquidCrystal *) instance)->write(value);
+}

libraries/LiquidCrystal/LiquidCrystal.h

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+#ifndef LiquidCrystal_h
+#define LiquidCrystal_h
+
+#include <inttypes.h>
+#include "Print.h"
+
+class LiquidCrystal : public Print {
+public:
+  LiquidCrystal(uint8_t, uint8_t, uint8_t, uint8_t, uint8_t, uint8_t, uint8_t);
+  LiquidCrystal(uint8_t, uint8_t, uint8_t, uint8_t, uint8_t, uint8_t, uint8_t,
+    uint8_t, uint8_t, uint8_t, uint8_t);
+  void clear();
+  void home();
+  void setCursor(int, int); 
+  /*
+  void shiftDisplayLeft();
+  void shiftDisplayRight();
+  */
+  void write(int, int = 1);
+  void command(int);
+private:
+  uint8_t _four_bit_mode;
+  uint8_t _rs_pin; // LOW: command.  HIGH: character.
+  uint8_t _rw_pin; // LOW: write to LCD.  HIGH: read from LCD.
+  uint8_t _enable_pin; // activated by a HIGH pulse.
+  uint8_t _data_pins[8];
+};
+
+void baseWrite(uint8_t, void *);
+
+#endif

libraries/LiquidCrystal/examples/HelloWorld/HelloWorld.pde

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+#include <LiquidCrystal.h>
+
+LiquidCrystal lcd(12, 11, 2, 7, 8, 9, 10);
+
+void setup()
+{
+  lcd.print("hello, world!");
+}
+
+void loop()
+{
+}

libraries/LiquidCrystal/examples/SerialDisplay/SerialDisplay.pde

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+#include <LiquidCrystal.h>
+
+LiquidCrystal lcd(12, 11, 2, 7, 8, 9, 10);
+
+void setup()
+{
+  Serial.begin(9600);
+}
+
+void loop()
+{
+  if (Serial.available()) {
+    delay(100);
+    lcd.clear();
+    while (Serial.available() > 0) {
+      lcd.write(Serial.read());
+    }
+  }
+}

libraries/LiquidCrystal/keywords.txt

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+#######################################
+# Syntax Coloring Map For LiquidCrystal
+#######################################
+
+#######################################
+# Datatypes (KEYWORD1)
+#######################################
+
+LiquidCrystal	KEYWORD1
+
+#######################################
+# Methods and Functions (KEYWORD2)
+#######################################
+
+clear	KEYWORD2
+home	KEYWORD2
+print	KEYWORD2
+setCursor	KEYWORD2
+
+#######################################
+# Constants (LITERAL1)
+#######################################
+