Diff: TextLCD_16x4.cpp

Revision:

1:6ad3406d5912

Parent:

0:473988c75437

--- a/TextLCD_16x4.cpp	Wed Dec 10 10:34:24 2014 +0000
+++ b/TextLCD_16x4.cpp	Thu Dec 11 08:59:57 2014 +0000
@@ -1,31 +1,19 @@
-/* mbed TextLCD Library, for a 4-bit LCD based on HD44780
- * Copyright (c) 2007-2010, sford, http://mbed.org
- *
- * 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.
- */
+/*********************************************************************************************************************** 
+This library is based upon the original TextLCD library. This library has been modified so it can be used with a 16x4 LCD
+The traditional 'wait' function has been chnaged to use 16 bit Timer 1 rather than 32 bit Timer 0 which is what is set up 
+usually in the mbed library. The reason for this change is so that the new wait function and this library could be used 
+alongside a PulseWidthCapture program which needs to use the 32 bit timer. 
+
+This program requires Library 'LCD_Wait' to work
+Callum Ellor
+**************************************************************************************************************************/
 
 #include "TextLCD_16x4.h"
 #include "LCD_Wait.h"
 #include "mbed.h"
 
 
-LCD_Wait lcd_wait;
+LCD_Wait lcd_wait;              // Use LCD_Wait library to replace standard wait function
 
 TextLCD::TextLCD(PinName rs, PinName e, PinName d4, PinName d5,
                  PinName d6, PinName d7, LCDType type) : _rs(rs),
@@ -130,17 +118,16 @@
                 case 3:
                     return 0xd4 + column;
             }
-        case LCD16x4:
+        case LCD16x4:                               // 16x4 LCD added
             switch (row) {
                 case 0:
                     return 0x80 + column;
                 case 1:
                     return 0xc0 + column;
                 case 2:
-                    return 0x90 + column;
-                   // return 0x94 + column;
+                    return 0x90 + column;           //changed to work with 16x4
                 case 3:
-                    return 0xd0 + column;
+                    return 0xd0 + column;           //changed to work with 16x4
             }
         case LCD16x2B:
             return 0x80 + (row * 40) + column;
@@ -158,7 +145,7 @@
             return 20;
         case LCD16x2:
         case LCD16x2B:
-        case LCD16x4:
+        case LCD16x4:               //added to work with 16x4
         default:
             return 16;
     }
@@ -167,7 +154,7 @@
 int TextLCD::rows() {
     switch (_type) {
         case LCD20x4:
-        case LCD16x4:
+        case LCD16x4:               //added to work with 16x4
             return 4;
         case LCD16x2:
         case LCD16x2B: