![](/media/cache/profiles/c2368d3d45705a56e51ec5940e187f8d.50x50_q85.jpg)
Functions test with Optrex LCD 20x4
Dependents: DatatypesLength AsciiCode IntegerFormatSpecifiers FloatFormatSpecifier
Diff: OptrexLCD.h
- Revision:
- 0:ef7b6dec773f
diff -r 000000000000 -r ef7b6dec773f OptrexLCD.h --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/OptrexLCD.h Mon Nov 22 21:58:23 2010 +0000 @@ -0,0 +1,105 @@ +/* mbed TextLCD Library, for a 4-bit LCD based on Optrex DCM20481 NY-LY-ABE +* Copyright (c) 2007-2010, sford modified by E.Sjoukes +* +* 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_OptrexLCD_H +#define MBED_OptrexLCD_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 "OptrexLCD.h" +* +* TextLCD lcd(p10, p12, p15, p16, p17, p18 ); // rs, e, d0-d3 +* +* 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 d0-d3 Data lines + * @param type Sets the panel size/addressing mode (default = LCD16x2) + */ + TextLCD(PinName rs, PinName e, PinName d0, PinName d1, PinName d2, PinName d3, 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 \ No newline at end of file