Revision 2:9e13bd7280e1, committed 2010-11-29

Comitter:

Eduard

Date:

Mon Nov 29 22:26:12 2010 +0000

Parent:

1:a6effcf6c479

Child:

3:52fb10c44695

Commit message:

Changed in this revision

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/OptrexLCD.cpp	Mon Nov 29 22:26:12 2010 +0000
@@ -0,0 +1,180 @@
+/* mbed TextLCD Library, for a 4-bit LCD based on Optrex DCM20481 NY-LY-ABE
+*
+* Copyright (c) 2007-2010, sford modified by E.Sjoukes
+*
+* Permission is hereby granted, free of charge, to any person obtaining a copy
+* of this software and associated documentation files (the "Software"), to deal
+* in the Software without restriction, including without limitation the rights
+* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+* copies of the Software, and to permit persons to whom the Software i
+* furnished to do so, subject to the following conditions:
+*
+* The above copyright notice and this permission notice shall be included in
+* all copies or substantial portions of the Software.
+*
+* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+* THE SOFTWARE.
+*/
+
+#include "OptrexLCD.h"
+#include "mbed.h"
+
+// initialiseer  
+TextLCD::TextLCD(PinName rs, PinName e, PinName d0, PinName d1, PinName d2, 
+            PinName d3, LCDType type) : _rs(rs), _e(e), _d(d0, d1, d2, d3), _type(type) 
+{
+    _e  = 1;                // enable normaly high
+    _rs = 0;                // command mode
+ 
+    wait(0.015);            // Wait 15ms to ensure powered up
+
+    for (int i=0; i<3; i++) // send "Display Settings" 3 times
+    {
+        writeByte(0x3);
+        wait(0.00164);      // this command takes 1.64ms, so wait for it
+    }
+    writeByte(0x2);         // 4-bit mode
+    wait(0.000040f);        // most instructions take 40us
+
+    writeCommand(0x28);     // Function set 001 BW N F - -
+    writeCommand(0x0C);
+    writeCommand(0x6);      // Cursor Direction and Display Shift : 0000 01 CD S (CD 0-left, 1-right S(hift) 0-no, 1-yes
+    cls();
+}
+ 
+void TextLCD::character(int column, int row, int c) 
+{
+    int a = address(column, row);
+    writeCommand(a);
+    writeData(c);
+}
+ 
+void TextLCD::cls() 
+{
+    writeCommand(0x01);    // cls, and set cursor to 0
+    wait(0.003000f);       // This command takes 3ms with Optrex, normaly it wood be 1.64ms
+    locate(0, 0);
+}
+ 
+void TextLCD::locate(int column, int row) 
+{
+    _column = column;
+    _row = row;
+}
+ 
+int TextLCD::_putc(int value) 
+{
+    if (value == '\n') 
+    {
+        _column = 0;
+        _row++;
+        if (_row >= rows()) 
+        {
+            _row = 0;
+        }
+    } 
+    else 
+    {
+        character(_column, _row, value);
+        _column++;
+        if (_column >= columns()) 
+        {
+            _column = 0;
+            _row++;
+            if (_row >= rows()) 
+            {
+                _row = 0;
+            }
+        }
+    }
+    return value;
+}
+ 
+int TextLCD::_getc() 
+{
+     return -1;
+}
+ 
+void TextLCD::writeByte(int value) 
+{
+     _d = value >> 4;
+     wait(0.000040f);   // most instructions take 40us
+     _e = 0;
+     wait(0.000075f);   // enable puls of Optrex needs to be 75us 
+     _e = 1;
+     _d = value >> 0;
+     wait(0.000075f);   // enable puls of Optrex needs to be 75us
+     _e = 0;
+     wait(0.000075f);   // enable puls of Optrex needs to be 75us
+     _e = 1;
+}
+ 
+void TextLCD::writeCommand(int command) 
+{
+     _rs = 0;
+     writeByte(command);
+}
+
+void TextLCD::writeData(int data) 
+{
+     _rs = 1;
+     writeByte(data);
+}
+
+int TextLCD::address(int column, int row) 
+{
+     switch (_type) 
+     {
+       case LCD20x4:
+             switch (row) 
+             {
+                 case 0:
+                     return 0x80 + column;
+                 case 1:
+                     return 0xc0 + column;
+                 case 2:
+                     return 0x94 + column;
+                 case 3:
+                     return 0xd4 + column;
+             }
+         case LCD16x2B:
+            return 0x80 + (row * 40) + column;
+         case LCD16x2:
+         case LCD20x2:
+         default:
+             return 0x80 + (row * 0x40) + column;
+     }
+}
+ 
+int TextLCD::columns() 
+{
+     switch (_type) 
+     {
+         case LCD20x4:
+         case LCD20x2:
+            return 20;
+         case LCD16x2:
+         case LCD16x2B:
+         default:
+             return 16;
+     }
+}
+ 
+int TextLCD::rows() 
+{
+     switch (_type) 
+     {
+         case LCD20x4:
+             return 4;
+         case LCD16x2:
+         case LCD16x2B:
+         case LCD20x2:
+         default:
+             return 2;
+     }
+}

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/OptrexLCD.h	Mon Nov 29 22:26:12 2010 +0000
@@ -0,0 +1,105 @@
+/* mbed TextLCD Library, for a 4-bit LCD based on Optrex  DCM20481 NY-LY-ABE
+* Copyright (c) 2007-2010, sford modified by E.Sjoukes
+*
+* Permission is hereby granted, free of charge, to any person obtaining a copy
+* of this software and associated documentation files (the "Software"), to deal
+* in the Software without restriction, including without limitation the rights
+* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+* copies of the Software, and to permit persons to whom the Software is
+* furnished to do so, subject to the following conditions:
+*
+* The above copyright notice and this permission notice shall be included in
+* all copies or substantial portions of the Software.
+*
+* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+* THE SOFTWARE.
+*/
+ 
+#ifndef MBED_OptrexLCD_H
+#define MBED_OptrexLCD_H
+ 
+#include "mbed.h"
+ 
+/** A TextLCD interface for driving 4-bit HD44780-based LCDs
+*
+* Currently supports 16x2, 20x2 and 20x4 panels
+*
+* @code
+* #include "mbed.h"
+* #include "OptrexLCD.h"
+* 
+* TextLCD lcd(p10, p12, p15, p16, p17, p18 ); // rs, e, d0-d3
+* 
+* int main() {
+*     lcd.printf("Hello World!\n");
+* }
+* @endcode
+*/
+class TextLCD : public Stream 
+{
+public:
+     /** LCD panel format */
+     enum LCDType 
+     {
+         LCD16x2,   /**< 16x2 LCD panel (default) */
+         LCD16x2B,  /**< 16x2 LCD panel alternate addressing */
+         LCD20x2,   /**< 20x2 LCD panel */
+         LCD20x4    /**< 20x4 LCD panel */
+     };
+ 
+     /** Create a TextLCD interface
+       * @param rs    Instruction/data control line
+       * @param e     Enable line (clock)
+       * @param d0-d3 Data lines
+       * @param type  Sets the panel size/addressing mode (default = LCD16x2)
+     */
+     TextLCD(PinName rs, PinName e, PinName d0, PinName d1, PinName d2, PinName d3, LCDType type = LCD16x2);
+ 
+#if DOXYGEN_ONLY
+     /** Write a character to the LCD
+       * @param c The character to write to the display
+     */
+     int putc(int c);
+ 
+     /** Write a formated string to the LCD
+       * @param format A printf-style format string, followed by the variables to use in formating the string.            
+      */
+     int printf(const char* format, ...);
+#endif
+ 
+     /** Locate to a screen column and row
+       * @param column  The horizontal position from the left, indexed from 0
+       * @param row     The vertical position from the top, indexed from 0
+      */
+     void locate(int column, int row);
+ 
+     /** Clear the screen and locate to 0,0 */
+     void cls();
+     int rows();
+     int columns();
+ 
+protected:
+    // Stream implementation functions
+    virtual int _putc(int value);
+    virtual int _getc();
+ 
+    int address(int column, int row);
+    void character(int column, int row, int c);
+    void writeByte(int value);
+    void writeCommand(int command);
+    void writeData(int data);
+
+    DigitalOut _rs, _e;
+    BusOut _d;
+    LCDType _type;
+ 
+    int _column;
+    int _row;
+};
+
+#endif
\ No newline at end of file

--- a/main.cpp	Mon Nov 22 22:23:08 2010 +0000
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,24 +0,0 @@
-#include "mbed.h"
-#include "OptrexLCD.h"
-
-DigitalOut BlinkLed(LED4);
-
-TextLCD lcd(p10, p12, p15, p16, p17, p18, TextLCD::LCD20x4 ); // rs, e, d0-d3
- 
-int main() {
-    lcd.printf("Start Hello World!\n");
-    char teller = 0;
-    lcd.printf("Tweede regel? %d \n", teller);
-    wait(1.5);
-    
-    while(1){
-        wait(0.5);
-        lcd.cls();       
-        lcd.printf("125 Hello World! \n");
-        lcd.printf("Tweede regel? %d \n", teller);
-        lcd.printf("Derde regel? %d \n", (teller*3));
-        lcd.printf("Vierde regel? \n");
-        teller = teller++;
-        BlinkLed = !BlinkLed;
-    }
-}

--- a/mbed.bld	Mon Nov 22 22:23:08 2010 +0000
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,1 +0,0 @@
-http://mbed.org/users/mbed_official/code/mbed/builds/e2ac27c8e93e