Diff: TextOLED.cpp

Revision:

0:4467cf9395fd

Child:

1:df8722660f48

--- /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;
+    }
+}