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.
hd44780_8bit.cpp
- Committer:
- hlipka
- Date:
- 2010-11-16
- Revision:
- 1:65f72ed914fa
- Parent:
- 0:ae5037e3d6e0
- Child:
- 2:5ac5bab7daaf
File content as of revision 1:65f72ed914fa:
/* * 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(const unsigned int line, const unsigned int pos, const 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(const unsigned char cmd) { _rs->write(0); wait_us(1); sendByte(cmd); } void HD44780LCD8bit::sendData(const 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(const unsigned char byte) { _data->write(byte); _enable->write(1); wait_us(2); _enable->write(0); wait_us(30); }