Display text on LCD displays (even on multiple ones). Allow to create windows (frames) on display, and to combine them (split, add, duplicate, scroll). See http://mbed.org/users/hlipka/notebook/lcdwindow/ for more information.
Diff: hd44780_8bit.cpp
- Revision:
- 0:ae5037e3d6e0
- Child:
- 1:65f72ed914fa
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/hd44780_8bit.cpp Mon Nov 15 22:37:30 2010 +0000 @@ -0,0 +1,87 @@ +/* + * mbed LCDWindow library +* Copyright (c) 2010 Hendrik Lipka +* +* 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 "hd44780_8bit.h" + +#include "BusOut.h" +#include "DigitalOut.h" +#include "wait_api.h" + + +void HD44780LCD8bit::writeText(unsigned int line, unsigned int pos, char text[]) { +// printf("print to %d,%d {%s}\n",line,pos,text); + int address=line*0x40+pos; + sendCmd((unsigned char)address|0x80); + wait_us(30); + + int i=0; + while (text[i]!=0) { + sendData(text[i]); + wait_us(30); + i++; + } +} + +void HD44780LCD8bit::clear() { + sendCmd(1); +} + +void HD44780LCD8bit::sendCmd(unsigned char cmd) { + _rs->write(0); + wait_us(1); + sendByte(cmd); +} + +void HD44780LCD8bit::sendData(unsigned char cmd) { + _rs->write(1); + wait_us(1); + sendByte(cmd); +} + +HD44780LCD8bit::HD44780LCD8bit +(unsigned int width, unsigned int height, BusOut *data, PinName enable, PinName rs) + :TextLCDBase(width, height) + { + _data=data; + _rs=new DigitalOut(rs); + _enable=new DigitalOut(enable); + _enable->write(0); + wait_ms(80); +} + +void HD44780LCD8bit::init() { + unsigned char initCmd[5]={0x38,0x08,0x01,0x06,0x0c}; + for (int i=0;i<sizeof(initCmd);i++) { + sendCmd(initCmd[i]); + wait_ms(50); + } +} + +void HD44780LCD8bit::sendByte(unsigned char byte) { + _data->write(byte); + _enable->write(1); + wait_us(2); + _enable->write(0); + wait_us(30); +} +