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:
- 2010-11-15
- Revision:
- 0:ae5037e3d6e0
- Child:
- 1:65f72ed914fa
File content as of revision 0:ae5037e3d6e0:
/* * 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(unsigned int line, unsigned int pos, char text[]) { printf("print to %d,%d {%s}\n",line,pos,text); int i=0; while (text[i]!=0) { setChar(line, pos+i,text[i]); i++; } } void KS0108LCD8bit::clear() { clearHalf(_left); if (NULL!=_right) clearHalf(_right); } void KS0108LCD8bit::clearHalf(DigitalOut* cs) { for (int x=0;x<8;x++) { for (int y=0;y<64;y++) { sendCmd(0xb8|x,cs); wait_us(1); sendCmd(0x40|y,cs); wait_us(1); sendData(0,cs); wait_us(1); } } } void KS0108LCD8bit::setChar(unsigned int line, unsigned int pos, char c) { DigitalOut* cs=NULL; if (pos>7) { cs=_right; pos-=8; } else { cs=_left; } if (NULL==cs) return; sendCmd(0xb8|line,cs); // set x page unsigned int y=pos*8; sendCmd(0x40|y,cs); // set start line // send character data for (int i=0;i<8;i++) { sendData(font_data[c][i],cs); } } KS0108LCD8bit::KS0108LCD8bit (unsigned int width, unsigned int height, BusOut *data, PinName enable, PinName rs, PinName leftCS, PinName rightCS) :TextLCDBase(width, height) { _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); } printf("left vs. right: %d / %d\n",_left,_right); wait_ms(50); clear(); } void KS0108LCD8bit::sendCmd(unsigned char cmd, DigitalOut *cs) { _rs->write(0); wait_us(1); sendByte(cmd, cs); wait_us(10); } void KS0108LCD8bit::sendData(unsigned char cmd, DigitalOut *cs) { _rs->write(1); wait_us(1); sendByte(cmd, cs); wait_us(10); } void KS0108LCD8bit::sendByte(unsigned char byte, DigitalOut *cs) { // display reads flags with rising flank of E // printf("send to %d\n",cs); _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); }