Revision 9:befde34054fb, committed 2014-05-27

Comitter:

Eduvance

Date:

Tue May 27 07:22:43 2014 +0000

Parent:

8:308d188a2d3a

Commit message:

A

Changed in this revision

diff -r 308d188a2d3a -r befde34054fb LCD.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/LCD.cpp	Tue May 27 07:22:43 2014 +0000
@@ -0,0 +1,34 @@
+#include "LCD.h"
+DigitalOut RS(p25);
+DigitalOut E(p24);
+BusOut data(p23,p22,p21,p20);
+void toggle_enable(void){
+E=1;
+wait(0.001);
+E=0;
+wait(0.001);
+}
+void LCD_init(void){
+wait(0.02);
+RS=0;
+E=0;
+data=0x2;
+toggle_enable();
+data=0x8;
+toggle_enable();
+data=0x0;
+toggle_enable();
+data=0xF;
+toggle_enable();
+data=0x0;
+toggle_enable();
+data=0x1;
+toggle_enable();
+}
+void display_to_LCD(char value){
+RS=1;
+data=value>>4;
+toggle_enable();
+data=value;
+toggle_enable();
+}

diff -r 308d188a2d3a -r befde34054fb LCD.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/LCD.h	Tue May 27 07:22:43 2014 +0000
@@ -0,0 +1,10 @@
+#ifndef LCD_H
+#define LCD_H
+
+#include "mbed.h"
+void toggle_enable(void);
+void LCD_init(void);
+void display_to_LCD (char value);
+#endif
+
+

diff -r 308d188a2d3a -r befde34054fb TextLCD.cpp
--- a/TextLCD.cpp	Thu Jan 02 21:07:01 2014 +0000
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,159 +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 e, PinName d4, PinName d5,
-                 PinName d6, PinName d7, LCDType type) : _rs(rs),
-        _e(e), _d(d4, d5, d6, d7),
-        _type(type) {
-
-    _e  = 1;
-    _rs = 0;            // command mode
-
-    wait(0.015);        // Wait 15ms 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++) {
-        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(0.00164f);     // This command takes 1.64 ms
-    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(0.000040f);
-    _e = 1;
-    _d = value >> 0;
-    wait(0.000040f);
-    _e = 0;
-    wait(0.000040f);  // most instructions take 40us
-    _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;
-    }
-}

diff -r 308d188a2d3a -r befde34054fb TextLCD.h
--- a/TextLCD.h	Thu Jan 02 21:07:01 2014 +0000
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,111 +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.
- */
-
-#ifndef MBED_TEXTLCD_H
-#define MBED_TEXTLCD_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 "TextLCD.h"
- * 
- * TextLCD lcd(p10, p12, p15, p16, p29, p30); // rs, e, d4-d7
- * 
- * 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 d4-d7 Data lines for using as a 4-bit interface
-     * @param type  Sets the panel size/addressing mode (default = LCD16x2)
-     */
-    TextLCD(PinName rs, PinName e, PinName d4, PinName d5, PinName d6, PinName d7, 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