Diff: SpiOLED.cpp

Revision:

3:c96e6ffd4c43

Parent:

2:45788bd06d4c

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/SpiOLED.cpp	Thu May 19 09:02:47 2016 +0000
@@ -0,0 +1,180 @@
+/* mbed SpiOLED Library, for a spi LCD based on Winstar WEH001602 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 "SpiOLED.h"
+#include "mbed.h"
+
+SpiOLED::SpiOLED(PinName mosi, PinName miso, PinName sclk, PinName cs, LCDType type) :
+        _spi(mosi, miso, sclk), _cs(cs), _type(type) {
+
+    _cs = 1;
+    _spi.format(10, 3);
+
+    wait_ms(100);        // Wait 15ms to ensure powered up
+
+    writeCommand(0x38); // Function set 001 BW N F - -
+    writeCommand(0x0C); // 0000 1 D C B
+    writeCommand(0x06); // Entry mode : 0000 01 I/D S
+    writeCommand(0x10); // Cursor and Display Shift 0001 S/C R/L 0 0
+    writeCommand(0x17); // DCDC on
+    wait_ms(10);
+    writeCommand(0x02); // Home
+    cls();
+}
+
+void SpiOLED::character(int column, int row, int c) {
+    int a = address(column, row);
+    writeCommand(a);
+    writeData(c);
+}
+
+void SpiOLED::cls() {
+    writeCommand(0x01); // cls, and set cursor to 0
+    wait_ms(10);     // This command takes 1.64 ms
+    locate(0, 0);
+}
+
+void SpiOLED::locate(int column, int row) {
+    _column = column;
+    _row = row;
+}
+
+int SpiOLED::_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 SpiOLED::_getc() {
+    return -1;
+}
+
+void SpiOLED::writeByte(int value, int rs) {
+    int dat;
+
+    dat = value & 0xff;
+    if (rs) dat |= 0x200;
+    _spi.write(dat);
+}
+
+void SpiOLED::writeCommand(int command) {
+    _cs = 0;
+    wait_us(1);
+    writeByte(command, 0);
+    _cs = 1;
+}
+
+void SpiOLED::writeData(int data) {
+    _cs = 0;
+    wait_us(1);
+    writeByte(data, 1);
+    _cs = 1;
+}
+
+int SpiOLED::isBusy() {
+    int dat;
+
+    _cs = 0;
+    wait_us(1);
+    _spi.write(0x100); // rs=0, rw=1
+    dat = _spi.write(0x100);
+    _cs = 1;
+    dat = dat >> 2;
+    return dat & 0x80;
+}
+
+int SpiOLED::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 SpiOLED::columns() {
+    switch (_type) {
+        case LCD8x2:
+            return 8;
+        case LCD20x4:
+        case LCD20x2:
+            return 20;
+        case LCD16x2:
+        case LCD16x2B:
+        default:
+            return 16;
+    }
+}
+
+int SpiOLED::rows() {
+    switch (_type) {
+        case LCD20x4:
+            return 4;
+        case LCD16x2:
+        case LCD16x2B:
+        case LCD20x2:
+        case LCD8x2:
+        default:
+            return 2;
+    }
+}
+
+void SpiOLED::cursor (bool flg) {
+    if (flg) {
+        writeCommand(0x0F); // 0000 1 D C B
+    } else {
+        writeCommand(0x0C); // 0000 1 D C B
+    }
+}