Hendrik Lipka / LcdWindow

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.

Dependents:   Mbell

ks0108_8bit.cpp@0:ae5037e3d6e0, 2010-11-15 (annotated)

Committer:
hlipka
Date:
Mon Nov 15 22:37:30 2010 +0000
Revision:
0:ae5037e3d6e0
Child:
1:65f72ed914fa
add support for KS0108-based graphical displays

Who changed what in which revision?

UserRevisionLine numberNew contents of line
hlipka 0:ae5037e3d6e0 1 /*
hlipka 0:ae5037e3d6e0 2 * mbed LCDWindow library
hlipka 0:ae5037e3d6e0 3 * Copyright (c) 2010 Hendrik Lipka
hlipka 0:ae5037e3d6e0 4 *
hlipka 0:ae5037e3d6e0 5 * Permission is hereby granted, free of charge, to any person obtaining a copy
hlipka 0:ae5037e3d6e0 6 * of this software and associated documentation files (the "Software"), to deal
hlipka 0:ae5037e3d6e0 7 * in the Software without restriction, including without limitation the rights
hlipka 0:ae5037e3d6e0 8 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
hlipka 0:ae5037e3d6e0 9 * copies of the Software, and to permit persons to whom the Software is
hlipka 0:ae5037e3d6e0 10 * furnished to do so, subject to the following conditions:
hlipka 0:ae5037e3d6e0 11 *
hlipka 0:ae5037e3d6e0 12 * The above copyright notice and this permission notice shall be included in
hlipka 0:ae5037e3d6e0 13 * all copies or substantial portions of the Software.
hlipka 0:ae5037e3d6e0 14 *
hlipka 0:ae5037e3d6e0 15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
hlipka 0:ae5037e3d6e0 16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
hlipka 0:ae5037e3d6e0 17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
hlipka 0:ae5037e3d6e0 18 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
hlipka 0:ae5037e3d6e0 19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
hlipka 0:ae5037e3d6e0 20 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
hlipka 0:ae5037e3d6e0 21 * THE SOFTWARE.
hlipka 0:ae5037e3d6e0 22 */
hlipka 0:ae5037e3d6e0 23
hlipka 0:ae5037e3d6e0 24 #include "ks0108_8bit.h"
hlipka 0:ae5037e3d6e0 25
hlipka 0:ae5037e3d6e0 26 #include "BusOut.h"
hlipka 0:ae5037e3d6e0 27 #include "DigitalOut.h"
hlipka 0:ae5037e3d6e0 28 #include "wait_api.h"
hlipka 0:ae5037e3d6e0 29 #include "font.h"
hlipka 0:ae5037e3d6e0 30
hlipka 0:ae5037e3d6e0 31 #define ENABLE 1
hlipka 0:ae5037e3d6e0 32
hlipka 0:ae5037e3d6e0 33 void KS0108LCD8bit::writeText(unsigned int line, unsigned int pos, char text[]) {
hlipka 0:ae5037e3d6e0 34 printf("print to %d,%d {%s}\n",line,pos,text);
hlipka 0:ae5037e3d6e0 35 int i=0;
hlipka 0:ae5037e3d6e0 36 while (text[i]!=0) {
hlipka 0:ae5037e3d6e0 37 setChar(line, pos+i,text[i]);
hlipka 0:ae5037e3d6e0 38 i++;
hlipka 0:ae5037e3d6e0 39 }
hlipka 0:ae5037e3d6e0 40 }
hlipka 0:ae5037e3d6e0 41
hlipka 0:ae5037e3d6e0 42 void KS0108LCD8bit::clear() {
hlipka 0:ae5037e3d6e0 43 clearHalf(_left);
hlipka 0:ae5037e3d6e0 44 if (NULL!=_right)
hlipka 0:ae5037e3d6e0 45 clearHalf(_right);
hlipka 0:ae5037e3d6e0 46 }
hlipka 0:ae5037e3d6e0 47
hlipka 0:ae5037e3d6e0 48 void KS0108LCD8bit::clearHalf(DigitalOut* cs) {
hlipka 0:ae5037e3d6e0 49 for (int x=0;x<8;x++)
hlipka 0:ae5037e3d6e0 50 {
hlipka 0:ae5037e3d6e0 51 for (int y=0;y<64;y++)
hlipka 0:ae5037e3d6e0 52 {
hlipka 0:ae5037e3d6e0 53 sendCmd(0xb8|x,cs);
hlipka 0:ae5037e3d6e0 54 wait_us(1);
hlipka 0:ae5037e3d6e0 55 sendCmd(0x40|y,cs);
hlipka 0:ae5037e3d6e0 56 wait_us(1);
hlipka 0:ae5037e3d6e0 57 sendData(0,cs);
hlipka 0:ae5037e3d6e0 58 wait_us(1);
hlipka 0:ae5037e3d6e0 59 }
hlipka 0:ae5037e3d6e0 60 }
hlipka 0:ae5037e3d6e0 61 }
hlipka 0:ae5037e3d6e0 62
hlipka 0:ae5037e3d6e0 63 void KS0108LCD8bit::setChar(unsigned int line, unsigned int pos, char c) {
hlipka 0:ae5037e3d6e0 64 DigitalOut* cs=NULL;
hlipka 0:ae5037e3d6e0 65 if (pos>7)
hlipka 0:ae5037e3d6e0 66 {
hlipka 0:ae5037e3d6e0 67 cs=_right;
hlipka 0:ae5037e3d6e0 68 pos-=8;
hlipka 0:ae5037e3d6e0 69 }
hlipka 0:ae5037e3d6e0 70 else
hlipka 0:ae5037e3d6e0 71 {
hlipka 0:ae5037e3d6e0 72 cs=_left;
hlipka 0:ae5037e3d6e0 73 }
hlipka 0:ae5037e3d6e0 74 if (NULL==cs)
hlipka 0:ae5037e3d6e0 75 return;
hlipka 0:ae5037e3d6e0 76
hlipka 0:ae5037e3d6e0 77 sendCmd(0xb8|line,cs); // set x page
hlipka 0:ae5037e3d6e0 78
hlipka 0:ae5037e3d6e0 79 unsigned int y=pos*8;
hlipka 0:ae5037e3d6e0 80 sendCmd(0x40|y,cs); // set start line
hlipka 0:ae5037e3d6e0 81
hlipka 0:ae5037e3d6e0 82 // send character data
hlipka 0:ae5037e3d6e0 83 for (int i=0;i<8;i++)
hlipka 0:ae5037e3d6e0 84 {
hlipka 0:ae5037e3d6e0 85 sendData(font_data[c][i],cs);
hlipka 0:ae5037e3d6e0 86 }
hlipka 0:ae5037e3d6e0 87
hlipka 0:ae5037e3d6e0 88 }
hlipka 0:ae5037e3d6e0 89
hlipka 0:ae5037e3d6e0 90 KS0108LCD8bit::KS0108LCD8bit
hlipka 0:ae5037e3d6e0 91 (unsigned int width, unsigned int height, BusOut *data, PinName enable, PinName rs, PinName leftCS, PinName rightCS)
hlipka 0:ae5037e3d6e0 92 :TextLCDBase(width, height) {
hlipka 0:ae5037e3d6e0 93 _data=data;
hlipka 0:ae5037e3d6e0 94 _rs=new DigitalOut(rs);
hlipka 0:ae5037e3d6e0 95 _enable=new DigitalOut(enable);
hlipka 0:ae5037e3d6e0 96 _left=new DigitalOut(leftCS);
hlipka 0:ae5037e3d6e0 97 _left->write(1-ENABLE);
hlipka 0:ae5037e3d6e0 98 if (NC!=rightCS)
hlipka 0:ae5037e3d6e0 99 {
hlipka 0:ae5037e3d6e0 100 _right=new DigitalOut(rightCS);
hlipka 0:ae5037e3d6e0 101 _right->write(1-ENABLE);
hlipka 0:ae5037e3d6e0 102 }
hlipka 0:ae5037e3d6e0 103 else
hlipka 0:ae5037e3d6e0 104 _right=NULL;
hlipka 0:ae5037e3d6e0 105 _enable->write(0);
hlipka 0:ae5037e3d6e0 106 wait_ms(80);
hlipka 0:ae5037e3d6e0 107 }
hlipka 0:ae5037e3d6e0 108
hlipka 0:ae5037e3d6e0 109 void KS0108LCD8bit::init() {
hlipka 0:ae5037e3d6e0 110 sendCmd(0x3f, _left);
hlipka 0:ae5037e3d6e0 111 wait_ms(10);
hlipka 0:ae5037e3d6e0 112 sendCmd(0xc0, _left);
hlipka 0:ae5037e3d6e0 113
hlipka 0:ae5037e3d6e0 114 if (NULL!=_right)
hlipka 0:ae5037e3d6e0 115 {
hlipka 0:ae5037e3d6e0 116 sendCmd(0x3f, _right);
hlipka 0:ae5037e3d6e0 117 wait_ms(10);
hlipka 0:ae5037e3d6e0 118 sendCmd(0xc0, _right);
hlipka 0:ae5037e3d6e0 119 }
hlipka 0:ae5037e3d6e0 120 printf("left vs. right: %d / %d\n",_left,_right);
hlipka 0:ae5037e3d6e0 121 wait_ms(50);
hlipka 0:ae5037e3d6e0 122 clear();
hlipka 0:ae5037e3d6e0 123 }
hlipka 0:ae5037e3d6e0 124
hlipka 0:ae5037e3d6e0 125 void KS0108LCD8bit::sendCmd(unsigned char cmd, DigitalOut *cs) {
hlipka 0:ae5037e3d6e0 126 _rs->write(0);
hlipka 0:ae5037e3d6e0 127 wait_us(1);
hlipka 0:ae5037e3d6e0 128 sendByte(cmd, cs);
hlipka 0:ae5037e3d6e0 129 wait_us(10);
hlipka 0:ae5037e3d6e0 130 }
hlipka 0:ae5037e3d6e0 131
hlipka 0:ae5037e3d6e0 132 void KS0108LCD8bit::sendData(unsigned char cmd, DigitalOut *cs) {
hlipka 0:ae5037e3d6e0 133 _rs->write(1);
hlipka 0:ae5037e3d6e0 134 wait_us(1);
hlipka 0:ae5037e3d6e0 135 sendByte(cmd, cs);
hlipka 0:ae5037e3d6e0 136 wait_us(10);
hlipka 0:ae5037e3d6e0 137 }
hlipka 0:ae5037e3d6e0 138
hlipka 0:ae5037e3d6e0 139 void KS0108LCD8bit::sendByte(unsigned char byte, DigitalOut *cs) {
hlipka 0:ae5037e3d6e0 140 // display reads flags with rising flank of E
hlipka 0:ae5037e3d6e0 141 // printf("send to %d\n",cs);
hlipka 0:ae5037e3d6e0 142 _enable->write(0);
hlipka 0:ae5037e3d6e0 143 cs->write(ENABLE);
hlipka 0:ae5037e3d6e0 144 _data->write(byte);
hlipka 0:ae5037e3d6e0 145
hlipka 0:ae5037e3d6e0 146 wait_us(2);
hlipka 0:ae5037e3d6e0 147 _enable->write(1);
hlipka 0:ae5037e3d6e0 148
hlipka 0:ae5037e3d6e0 149 // display reads data with falling flank of E
hlipka 0:ae5037e3d6e0 150 wait_us(2);
hlipka 0:ae5037e3d6e0 151 _enable->write(0);
hlipka 0:ae5037e3d6e0 152
hlipka 0:ae5037e3d6e0 153 wait_us(30);
hlipka 0:ae5037e3d6e0 154 cs->write(1-ENABLE);
hlipka 0:ae5037e3d6e0 155 }