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.
ks0108_8bit.cpp
- Committer:
- hlipka
- Date:
- 2011-02-22
- Revision:
- 9:2fe93daa2106
- Parent:
- 3:e5d5e2fe4bf6
File content as of revision 9:2fe93daa2106:
/* * 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 "ks0108_8bit.h" #include "BusOut.h" #include "DigitalOut.h" #include "wait_api.h" #include "font.h" #define ENABLE 1 void KS0108LCD8bit::writeText(const unsigned int column, const unsigned int row, const char text[]) { int i=0; while (text[i]!=0) { character(column+i, row,text[i]); i++; } } void KS0108LCD8bit::clear() { if (!_guard->take()) return; clearHalf(_left); if (NULL!=_right) clearHalf(_right); _guard->release(); } void KS0108LCD8bit::clearHalf(DigitalOut* cs) { for (int x=0;x<8;x++) { sendCmd(0xb8|x,cs); wait_us(1); for (int y=0;y<64;y++) { sendCmd(0x40|y,cs); wait_us(1); sendData(0,cs); wait_us(1); } } } void KS0108LCD8bit::character(int column, int row, int c){ DigitalOut* cs=NULL; int icolumn=column; if (icolumn>7) { cs=_right; icolumn-=8; } else { cs=_left; } if (NULL==cs) return; if (!_guard->take()) return; sendCmd(0xb8|row,cs); // set x page unsigned int y=icolumn*8; sendCmd(0x40|y,cs); // set start line // send character data for (int i=0;i<8;i++) { sendData(font_data[c][i],cs); } _guard->release(); } KS0108LCD8bit::KS0108LCD8bit (const unsigned int columns, const unsigned int rows, BusOut *data, const PinName enable, const PinName rs, const PinName leftCS, const PinName rightCS) :TextLCDBase(columns, rows) { _data=data; _rs=new DigitalOut(rs); _enable=new DigitalOut(enable); _left=new DigitalOut(leftCS); _left->write(1-ENABLE); if (NC!=rightCS) { _right=new DigitalOut(rightCS); _right->write(1-ENABLE); } else _right=NULL; _enable->write(0); wait_ms(80); } void KS0108LCD8bit::init() { sendCmd(0x3f, _left); wait_ms(10); sendCmd(0xc0, _left); if (NULL!=_right) { sendCmd(0x3f, _right); wait_ms(10); sendCmd(0xc0, _right); } wait_ms(50); clear(); } void KS0108LCD8bit::sendCmd(const unsigned char cmd, DigitalOut *cs) { _rs->write(0); wait_us(1); sendByte(cmd, cs); wait_us(10); } void KS0108LCD8bit::sendData(const unsigned char cmd, DigitalOut *cs) { _rs->write(1); wait_us(1); sendByte(cmd, cs); wait_us(10); } void KS0108LCD8bit::sendByte(const unsigned char byte, DigitalOut *cs) { // display reads flags with rising flank of E _enable->write(0); cs->write(ENABLE); _data->write(byte); wait_us(2); _enable->write(1); // display reads data with falling flank of E wait_us(2); _enable->write(0); wait_us(30); cs->write(1-ENABLE); }