Diff: TextLCD/TextLCD.cpp

Revision:

1:b3907b8d9f65

Parent:

0:1f422ed56e0f

Child:

2:825f572902c6

--- a/TextLCD/TextLCD.cpp	Thu Nov 03 20:38:12 2011 +0000
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,226 +0,0 @@
-/* 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.
- */
-
-#include "TextLCD.h"
-#include "mbed.h"
-
-TextLCD::TextLCD(PinName rs, PinName rw, PinName e, PinName d0, PinName d1,
-                 PinName d2, PinName d3, LCDType type) : _rs(rs), _rw(rw),
-        _e(e), _d(d0, d1, d2, d3), _type(type) {
-    _rs = 0;            // command mode
-    _rw = 0;
-    _e  = 0;            
-    _d.output();        // data out
-
-    wait(0.05);        // Wait 50ms to ensure powered up
-
-    // send "Display Settings" 3 times (Only top nibble of 0x30 as we've got 4-bit bus)
-    for (int i=0; i<3; i++) {
-        _e = 1;
-        __nop();
-        _d = 0x3;
-        __nop();
-        _e = 0;
-        wait(0.004f); // 4ms
-       }
-    _e = 1;
-    __nop();
-    _d = 0x2;           // 4 Bit mode
-    __nop(); 
-    _e = 0;
-    
-    writeCommand(0x28); // Function set 4 Bit, 2Line, 5*7
-    writeCommand(0x08); // Display off
-    writeCommand(0x01); // clear Display
-    writeCommand(0x04); // cursor right, Display is not shifted
-    writeCommand(0x0C); // Display on , Cursor off 
-}
-
-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
-    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() {
-    int a = address(_column, _row);
-    writeCommand(a);
-    return (readData());
-}
-
-void TextLCD::writeByte(int value) {
-    _e = 1;
-    __nop();    
-    _d = value >> 4;
-    __nop();
-    _e = 0;
-    __nop();
-    _e = 1;
-    __nop();
-    _d = value >> 0;
-    __nop();
-    _e = 0;
-}
-
-void TextLCD::writeCommand(int command) {
-    waitBusy();  // check if display is ready 
-    _rs = 0;
-    writeByte(command);
-}
-
-int TextLCD::readData(){
-    int input;
-    waitBusy();
-    _rw = 1;
-    _rs = 1;
-    __nop();
-    _d.input();  // switch Data port to input
-    _e = 1;
-    __nop();
-    input = _d.read() << 4; // high nibble
-    _e = 0;
-    __nop();
-    _e = 1;
-    __nop();
-    input = input | _d.read(); // low nibble
-    _e = 0;   
-    return (input);
-}
-
- void TextLCD::waitBusy(){
-    int input;
-    _rw = 1;
-    _rs = 0;
-    __nop();
-    _d.input();      // switch Data port to input
-    do{ 
-        _e = 1;
-        __nop();
-        input = _d.read();              
-        _e = 0;
-        __nop();
-        _e = 1;
-        __nop();
-        _e = 0;
-       }while((0x8 & input) == 0x8);  // wait until display is ready
-    _rw = 0;
-    _d.output();      // switch port back to output  
- }
-
-void TextLCD::writeData(int data) {
-    waitBusy();
-    _rs = 1;
-    writeByte(data);
-}
-
-
-// set user defined char 
-void  TextLCD::writeCGRAM(int address, int pattern[8]){
-    int i;
-    address = address & 0x07;  //max 8 char
-    for(i=0;i<8;i++){
-        waitBusy();  // check if display is ready 
-        _rs = 0;
-        writeByte(0x40 + address * 8 + i);
-        writeData(pattern[i]);
-        }
-}   
-        
-
-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;
-    }
-}