TextLCD library for controlling various LCD panels based on the HD44780 4-bit interface. adapted for winstar oled display by CJS august 2012. Moved some functions into public class to enable custom character generation from user code.
Dependents: CCRMonitor12_sp07_120ver
Fork of TextLCD by
Diff: TextOLED.cpp
- Revision:
- 11:25a700bce989
- Parent:
- 10:8e272a434581
- Child:
- 12:4d8dcfa5af6e
diff -r 8e272a434581 -r 25a700bce989 TextOLED.cpp --- a/TextOLED.cpp Tue Aug 07 11:32:45 2012 +0000 +++ b/TextOLED.cpp Mon Jan 14 12:51:35 2013 +0000 @@ -1,172 +1,161 @@ -/* 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" - -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) { -//edited 06082012 to run winstart oled 16x2 display - _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();*/ - wait(0.015); //wait `15ms for power up - - // send 4 bit mode commenad twice - writeByte(0x2); //set 4 bit mode - wait(0.00164); - writeByte(0x2); //set 4 bit mode - wait(0.00164); - writeByte(0x2a); //4 bit 2 lines display font table 1 - - wait(0.00164); - writeByte(0x01); // clear screen - writeByte(0x6); // cursor mode - writeByte(0xc); // Lcd on -} - -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; - } -} +/* 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" + +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) { +//edited 06082012 to run winstart oled 16x2 display + _e = 1; + _rs = 0; // command mode + + wait(0.100); // Wait 100ms to ensure powered up - need this long if run of 3.3V from mbed vout + + wait(0.015); //wait `15ms for power up + + + // send 4 bit mode commenad twice + writeByte(0x2); //set 4 bit mode + wait(0.00164); + writeByte(0x2); //set 4 bit mode + wait(0.00164); + writeByte(0x2a); //4 bit 2 lines display font table 1 + + wait(0.00164); + writeByte(0x01); // clear screen + writeByte(0x6); // cursor mode + writeByte(0xc); // Lcd on +} + +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; + } +}