mbed

Revision 0:4467cf9395fd, committed 21 Jun 2012

Comitter:

Suga koubou

Date:

Thu Jun 21 02:52:20 2012 +0000

Child:

1:df8722660f48

Commit message:

Changed in this revision

TextOLED.cpp	Show annotated file Show diff for this revision Revisions of this file
TextOLED.h	Show annotated file Show diff for this revision Revisions of this file

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/TextOLED.cpp	Thu Jun 21 02:52:20 2012 +0000
@@ -0,0 +1,181 @@
+/* mbed TextOLED Library, for a 4-bit LCD based on Winstar WEH000000 series
+ *   Originl: http://mbed.org/users/simon/libraries/TextLCD/latest
+ *   Modified by Suga
+ */
+/* 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 "TextOLED.h"
+#include "mbed.h"
+
+TextOLED::TextOLED(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_ms(100);        // Wait 15ms to ensure powered up
+
+    write4bit(0x3);     // 8-bit mode
+    write4bit(0x0);     // 8-bit mode
+    write4bit(0x2);     // 4-bit mode
+
+    writeCommand(0x13); // DCDC off
+    wait_ms(100);
+
+    writeCommand(0x28); // Function set 001 BW N F - -
+    writeCommand(0x0C); // 0000 1 D C B
+    writeCommand(0x06); // Entry mode : 0000 01 I/D S
+    cls();
+    writeCommand(0x02); // Home
+    writeCommand(0x10); // Cursor and Display Shift 0001 S/C R/L 0 0
+    writeCommand(0x17); // DCDC on
+    wait_ms(100);
+}
+
+void TextOLED::character(int column, int row, int c) {
+    int a = address(column, row);
+    writeCommand(a);
+    writeData(c);
+}
+
+void TextOLED::cls() {
+    writeCommand(0x01); // cls, and set cursor to 0
+    wait_ms(10);     // This command takes 1.64 ms
+    locate(0, 0);
+}
+
+void TextOLED::locate(int column, int row) {
+    _column = column;
+    _row = row;
+}
+
+int TextOLED::_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 TextOLED::_getc() {
+    return -1;
+}
+
+void TextOLED::write4bit(int value) {
+    _d = value;
+    wait_us(1);
+    _e = 0;
+    wait_us(1);
+    _e = 1;
+    wait_ms(10);
+}
+
+void TextOLED::writeByte(int value) {
+    _d = value >> 4;
+    wait_us(1);
+    _e = 0;
+    wait_us(1);
+    _e = 1;
+    wait_us(1);
+    _d = value >> 0;
+    wait_us(1);
+    _e = 0;
+    wait_us(1);
+    _e = 1;
+    wait_us(50);
+}
+
+void TextOLED::writeCommand(int command) {
+    _rs = 0;
+    writeByte(command);
+}
+
+void TextOLED::writeData(int data) {
+    _rs = 1;
+    writeByte(data);
+}
+
+int TextOLED::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:
+        case LCD8x2:
+        default:
+            return 0x80 + (row * 0x40) + column;
+    }
+}
+
+int TextOLED::columns() {
+    switch (_type) {
+        case LCD8x2:
+            return 8;
+        case LCD20x4:
+        case LCD20x2:
+            return 20;
+        case LCD16x2:
+        case LCD16x2B:
+        default:
+            return 16;
+    }
+}
+
+int TextOLED::rows() {
+    switch (_type) {
+        case LCD20x4:
+            return 4;
+        case LCD16x2:
+        case LCD16x2B:
+        case LCD20x2:
+        case LCD8x2:
+        default:
+            return 2;
+    }
+}

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/TextOLED.h	Thu Jun 21 02:52:20 2012 +0000
@@ -0,0 +1,117 @@
+/* mbed TextOLED Library, for a 4-bit LCD based on Winstar WEH000000 series
+ *   Originl: http://mbed.org/users/simon/libraries/TextLCD/latest
+ *   Modified by Suga
+ */
+/* 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_TEXTOLED_H
+#define MBED_TEXTOLED_H
+
+#include "mbed.h"
+
+/** A TextOLED interface for driving 4-bit HD44780-based LCDs
+ *
+ * Currently supports 16x2, 20x2 and 20x4 panels
+ *
+ * @code
+ * #include "mbed.h"
+ * #include "TextOLED.h"
+ * 
+ * TextOLED lcd(p10, p12, p15, p16, p29, p30); // rs, e, d4-d7
+ * 
+ * int main() {
+ *     lcd.printf("Hello World!\n");
+ * }
+ * @endcode
+ */
+class TextOLED : 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 */
+        , LCD8x2    /**<  8x4 LCD panel */
+    };
+
+    /** Create a TextOLED 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)
+     */
+    TextOLED(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 write4bit(int value);
+    void writeByte(int value);
+    void writeCommand(int command);
+    void writeData(int data);
+
+    DigitalOut _rs, _e;
+    BusOut _d;
+    LCDType _type;
+
+    int _column;
+    int _row;
+};
+
+#endif