Revision 1:96f055419f71, committed 2013-05-22

Comitter:

fossum_13

Date:

Wed May 22 02:10:44 2013 +0000

Parent:

0:df5850d83ee5

Commit message:

Initial commit

Changed in this revision

diff -r df5850d83ee5 -r 96f055419f71 SerialLCD.cpp
--- a/SerialLCD.cpp	Sun Feb 13 15:16:20 2011 +0000
+++ b/SerialLCD.cpp	Wed May 22 02:10:44 2013 +0000
@@ -1,48 +1,195 @@
-
 #include "SerialLCD.h"
 
-
-SerialLCD::SerialLCD(PinName tx, PinName rx) : 
-    Serial(tx, rx)
+SerialLCD::SerialLCD(PinName tx, uint8_t type) : 
+    Serial(tx, NC)
 {
+    // Init
     baud(LCD_BAUD);
+    setType(type);
+    
+    _rowoffset = 0;
+    
+    // Reset
+    clear();
+    setBrightness(30);
 }
 
-
 void SerialLCD::clear()
 {
-    putc(0xFE);
-    putc(0x01);
+    command(LCD_CLEARDISPLAY);
+}
+
+void SerialLCD::clearLine(uint8_t line)
+{
+    if(line > 0 && line <= _numlines){
+        setCursor(line, 1);
+        printf("                ");
+        setCursor(line, 1);
+    }
+}
+
+void SerialLCD::selectLine(uint8_t line)
+{
+    if(line > 0 && line <= _numlines){
+        setCursor(line, 1);
+    }
+}
+
+void SerialLCD::setBrightness(uint8_t num)
+{
+    if(num >= 1 && num <= 30){
+        specialCommand(LCD_BACKLIGHT | (num - 1));
+    }
+}
+
+void SerialLCD::home()
+{
+    command(LCD_RETURNHOME);
+}
+
+void SerialLCD::setSplash()
+{
+    specialCommand(LCD_SETSPLASHSCREEN);
 }
 
-void SerialLCD::setBacklight(int brightness)
+void SerialLCD::setType(uint8_t type)
 {
-    putc(0x7C);
-    putc(128+brightness);
+/*
+  3: type 2x16
+  4: type 2x20
+  5: type 4x16
+  6: type 4x20
+*/
+    specialCommand(type);
+    switch (type) {
+      case 3:
+        _numlines = LCD_2LINE;
+        _numchars = LCD_16CHAR;
+
+        break;
+      case 4:
+        _numlines = LCD_2LINE;
+        _numchars = LCD_20CHAR;
+
+        break;
+      case 5:
+        _numlines = LCD_4LINE;
+        _numchars = LCD_16CHAR;
+
+        break;
+      case 6:
+        _numlines = LCD_4LINE;
+        _numchars = LCD_20CHAR;
+
+        break;
+
+      default:
+        _numlines = LCD_2LINE;
+        _numchars = LCD_16CHAR;
+    }
 }
 
-void SerialLCD::setPosition(int row, int col)
+void SerialLCD::toggleSplash()
+{
+    specialCommand(LCD_SPLASHTOGGLE);
+}
+
+void SerialLCD::leftToRight()
+{
+    _displaymode |= LCD_ENTRYLEFT;
+    command(LCD_ENTRYMODESET | _displaymode);
+}
+
+void SerialLCD::rightToLeft()
 {
-    int position = row == 0 ? (128 + col) : (192 + col);
-    putc(0xFE);
-    putc(position);
+    _displaymode &= ~LCD_ENTRYLEFT;
+    command(LCD_ENTRYMODESET | _displaymode);
+}
+
+void SerialLCD::blink()
+{
+    _displaycontrol |= LCD_BLINKON;
+    command(LCD_DISPLAYCONTROL | _displaycontrol);
+}
+
+void SerialLCD::noBlink()
+{
+    _displaycontrol &= ~LCD_BLINKON;
+    command(LCD_DISPLAYCONTROL | _displaycontrol);
+}
+
+void SerialLCD::cursor()
+{
+    _displaycontrol |= LCD_CURSORON;
+    command(LCD_DISPLAYCONTROL | _displaycontrol);
 }
 
-void SerialLCD::setVisible(bool visible)
+void SerialLCD::noCursor()
+{
+    _displaycontrol &= ~LCD_CURSORON;
+    command(LCD_DISPLAYCONTROL | _displaycontrol);
+}
+
+void SerialLCD::display()
+{
+    _displaycontrol |= LCD_DISPLAYON;
+    command(LCD_DISPLAYCONTROL | _displaycontrol);
+}
+
+void SerialLCD::noDisplay()
+{
+    _displaycontrol &= ~LCD_DISPLAYON;
+    command(LCD_DISPLAYCONTROL | _displaycontrol);
+}
+
+void SerialLCD::setCursor(uint8_t row, uint8_t col)
 {
-    putc(0xFE);
-    putc(visible ? 0x0C : 0x08);
+    int row_offsets[2][4] = {
+        { 0x00, 0x40, 0x10, 0x50 },
+        { 0x00, 0x40, 0x14, 0x54 }
+    };
+    if((row > 0 && row < 3) && (col > 0 && col < 17)){
+        command(LCD_SETDDRAMADDR | ((col - 1) + row_offsets[_rowoffset][(row - 1)]));
+    }
+}
+
+void SerialLCD::createChar(uint8_t location, uint8_t charmap[])
+{
+    location -= 1;
+    location &= 0x07;
+    for (int i=0; i<8; i++){
+        command(LCD_SETCGRAMADDR | (location << 3) | i);
+        putc(charmap[i]);
+    }
+}
+
+void SerialLCD::printCustomChar(uint8_t num)
+{
+    putc((num - 1));
 }
 
 void SerialLCD::scrollLeft()
 {
-    putc(0xFE);
-    putc(0x18);
+    command(0x18);
 }
 
 void SerialLCD::scrollRight()
 {
+    command(0x1C);
+}
+
+// Private Functions
+
+void SerialLCD::command(uint8_t value)
+{
     putc(0xFE);
-    putc(0x1C);
+    putc(value);
+    wait_ms(5);
 }
-    
\ No newline at end of file
+
+void SerialLCD::specialCommand(uint8_t value)
+{
+    putc(0x7C);
+    putc(value);
+    wait_ms(5);
+}

diff -r df5850d83ee5 -r 96f055419f71 SerialLCD.h
--- a/SerialLCD.h	Sun Feb 13 15:16:20 2011 +0000
+++ b/SerialLCD.h	Wed May 22 02:10:44 2013 +0000
@@ -3,55 +3,218 @@
 
 #include "mbed.h"
 
-#define LCD_WIDTH 16
 #define LCD_BAUD 9600
 
+// Commands
+#define LCD_BACKLIGHT       0x80
+#define LCD_CLEARDISPLAY    0x01
+#define LCD_CURSORSHIFT     0x10
+#define LCD_DISPLAYCONTROL  0x08
+#define LCD_ENTRYMODESET    0x04
+#define LCD_FUNCTIONSET     0x20
+#define LCD_SETCGRAMADDR    0x40
+#define LCD_SETDDRAMADDR    0x80
+#define LCD_SETSPLASHSCREEN 0x0A
+#define LCD_SPLASHTOGGLE    0x09
+#define LCD_RETURNHOME      0x02
+
+// Flags for display entry mode
+#define LCD_ENTRYRIGHT      0x00
+#define LCD_ENTRYLEFT       0x02
+
+// Flags for display on/off control
+#define LCD_BLINKON         0x01
+#define LCD_CURSORON        0x02
+#define LCD_DISPLAYON       0x04
+
+// Flags for display size
+#define LCD_2LINE           0x02
+#define LCD_4LINE           0x04
+#define LCD_16CHAR          0x10
+#define LCD_20CHAR          0x14
+
+//  Flags for setting display size
+#define LCD_SET2LINE        0x06
+#define LCD_SET4LINE        0x05
+#define LCD_SET16CHAR       0x04
+#define LCD_SET20CHAR       0x03
+
+// LCD Types
+#define LCD_2X16            3
+#define LCD_2X20            4
+#define LCD_4X16            5
+#define LCD_4X20            6
+
 /**
  * SparkFun SerLCD v2.5 Controller
+ * 
+ * Copied from the Arduino.cc SerLCD library.
+ * @see http://playground.arduino.cc/Code/SerLCD
  */
 class SerialLCD : public Serial
 {
   public:
-  
-    /**
-     * Constructor.
+    /** Constructor.
      * @param tx Connected to rx pin of LCD
-     * @param rx Not connected but needs to be specified for serial interface.
+     * @param type Type of LCD (Optional default 16x2) 
      */
-    SerialLCD(PinName tx, PinName rx);
+    SerialLCD(PinName tx, uint8_t type = 3);
     
-    /**
-     * Clear the LCD.
+    /** Blinks the cursor. This blinks the whole
+     *  box or just the cursor bar.
+     */
+    void blink();
+    
+    /** Clears the whole LCD and sets the
+     *  cursor to the first row, first column.
      */
     void clear();
-    
-    /**
-     * Set backlight brightness;
+    /** Clears the current line and resets
+     *  the cursor to the beginning of the
+     *  line.
      */
-    void setBacklight(int brightness);
-    
-    /**
-     * Set cursor position.
+    void clearLine(uint8_t);
+    /** Creates a custom character for the
+     *  LCD.
+     * @param location Location to store the char (1-8)
+     * @param data Byte array containing the enabled pixel bits
+     * @code
+     *  #include <NewSoftSerial.h>
+     *  #include <serLCD.h>
+     *  
+     *  // Set pin to the LCD's rxPin
+     *  int pin = 2;
+     *   
+     *  serLCD lcd(pin);
+     *   
+     *  byte bars[8][8] = {
+     *    {B00000,B00000,B00000,B00000,B00000,B00000,B00000,B11111},
+     *    {B00000,B00000,B00000,B00000,B00000,B00000,B11111,B11111},
+     *    {B00000,B00000,B00000,B00000,B00000,B11111,B11111,B11111},
+     *    {B00000,B00000,B00000,B00000,B11111,B11111,B11111,B11111},
+     *    {B00000,B00000,B00000,B11111,B11111,B11111,B11111,B11111},
+     *    {B00000,B00000,B11111,B11111,B11111,B11111,B11111,B11111},
+     *    {B00000,B11111,B11111,B11111,B11111,B11111,B11111,B11111},
+     *    {B11111,B11111,B11111,B11111,B11111,B11111,B11111,B11111}
+     *  };
+     *   
+     *  void main() {
+     *    for (int i=1; i < 9; i++){
+     *      lcd.createChar(i, bars[i-1]);
+     *    }
+     *    for (int i=1; i < 9; i++){
+     *      lcd.printCustomChar(i);
+     *    }
+     *    while(1);
+     *  }
+     *  
+     * @endcode
      */
-    void setPosition(int row, int col);
-    
-    /**
-     * Make LCD text visible or invisible.
+    void createChar(uint8_t, uint8_t[]);
+    /** Display the LCD cursor: an underscore (line) at the
+     *  position to which the next character will be written.
+     *  This does not define if it blinks or not.
+     */
+    void cursor();
+    /** Turns on the LCD display, after it's been turned off
+     *  with noDisplay(). This will restore the text (and
+     *  cursor) that was on the display.
+     */
+    void display();
+    /** Positions the cursor in the upper-left of the LCD.
+     */
+    void home();
+    /** Set the direction for text written to the LCD to
+     *  left-to-right, the default. This means that subsequent
+     *  characters written to the display will go from left to
+     *  right, but does not affect previously-output text.
+     */
+    void leftToRight();
+    /** Turns off the blinking LCD cursor.
      */
-    void setVisible(bool visible);
-    
-    /**
-     * Start scrolling to the left.
+    void noBlink();
+    /** Hides the LCD cursor.
+     */
+    void noCursor();
+    /** Turns off the LCD display, without losing the text
+     *  currently shown on it.
+     */
+    void noDisplay();
+    /** Print a custom character (gylph) on to the LCD. Up
+     *  to eight characters of 5x8 pixels are supported
+     *  (numbered 1 to 8). The custom characters are designed
+     *  by the createChar() command.
+     * @param location Which character to print (1 to 8), created by createChar()
+     */
+    void printCustomChar(uint8_t);
+    /** Set the direction for text written to the LCD to 
+     *  right-to-left (the default is left-to-right). This
+     *  means that subsequent characters written to the 
+     *  display will go from right to left, but does not
+     *  affect previously-output text.
+     */
+    void rightToLeft();
+    /** Scrolls the text on the LCD one position to the left.
      */
     void scrollLeft();
-    
-    /**
-     * Start scrolling to the right.
+    /** Scrolls the text on the LCD one position to the right.
      */
     void scrollRight();
+    /** Moves the cursor to the beginning of selected line.
+     *  Line numbers start with 1. Valid line numbers are 1-4.
+     * @param line Line number to go to
+     */
+    void selectLine(uint8_t line);
+    /** Sets the backlight brightness based on input value.
+     *  Values range from 1-30.
+     * @params brightness 1 = Off -> 30 = Full Brightness
+     */
+    void setBrightness(uint8_t num);
+    /** Position the LCD cursor.
+     * @param row Row position of the cursor (1 being the first row)
+     * @param col Column position the cursor (1 being the first column)
+     */
+    void setCursor(uint8_t row, uint8_t col);
+    /** Saves the first 2 lines of text that are currently 
+     *  printed on the LCD screen to memory as the new splash screen.
+     * @code
+     *  void setup()
+     *  {
+     *     lcd.print("      New       ");
+     *     lcd.print(" Splash Screen! ");
+     *     lcd.setSplash();
+     *  }
+     * @endcode
+     */
+    void setSplash();
+    /** The SerLCD firmware v2.5 supports setting different types
+     *  of LCD's. This function allows to easily set the type of LCD.
+     *
+     *  The function expects a parameter value of 3 - 6:
+     *  Defines:
+     *    LCD_2X16(3) - 2x16 LCD
+     *    LCD_2X20(4) - 2x20 LCD
+     *    LCD_4X16(5) - 4x16 LCD
+     *    LCD_4X20(6) - 4x20 LCD
+     *
+     *  After changing the settings, the value is written to the EEPROM
+     *  so the SerialLCD will remember it even after a power-off.
+     */
+    void setType(uint8_t type);
+    /** Toggles the splash screen on/off.
+     */
+    void toggleSplash();
     
-    
+private:
+    void command(uint8_t);
+    void specialCommand(uint8_t);
+
+    uint8_t _displayfunction;
+    uint8_t _displaycontrol;
+    uint8_t _displaymode;
+    uint8_t _numlines;
+    uint8_t _numchars;
+    uint8_t _rowoffset;
 };
 
-
 #endif