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

sed1335text.cpp@7:b472970bd8f6, 2011-01-04 (annotated)

Committer:
hlipka
Date:
Tue Jan 04 22:58:59 2011 +0000
Revision:
7:b472970bd8f6
Parent:
6:7ba288afed38
Child:
8:ba176eea3e40
removed debug messages, changed initialization for SED1335 to work for all display sizes (single panel only)

Who changed what in which revision?

UserRevisionLine numberNew contents of line
hlipka 6:7ba288afed38 1 /*
hlipka 6:7ba288afed38 2 * mbed LCDWindow library
hlipka 6:7ba288afed38 3 * Copyright (c) 2010 Hendrik Lipka
hlipka 6:7ba288afed38 4 *
hlipka 6:7ba288afed38 5 * Permission is hereby granted, free of charge, to any person obtaining a copy
hlipka 6:7ba288afed38 6 * of this software and associated documentation files (the "Software"), to deal
hlipka 6:7ba288afed38 7 * in the Software without restriction, including without limitation the rights
hlipka 6:7ba288afed38 8 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
hlipka 6:7ba288afed38 9 * copies of the Software, and to permit persons to whom the Software is
hlipka 6:7ba288afed38 10 * furnished to do so, subject to the following conditions:
hlipka 6:7ba288afed38 11 *
hlipka 6:7ba288afed38 12 * The above copyright notice and this permission notice shall be included in
hlipka 6:7ba288afed38 13 * all copies or substantial portions of the Software.
hlipka 6:7ba288afed38 14 *
hlipka 6:7ba288afed38 15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
hlipka 6:7ba288afed38 16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
hlipka 6:7ba288afed38 17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
hlipka 6:7ba288afed38 18 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
hlipka 6:7ba288afed38 19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
hlipka 6:7ba288afed38 20 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
hlipka 6:7ba288afed38 21 * THE SOFTWARE.
hlipka 6:7ba288afed38 22 */
hlipka 6:7ba288afed38 23
hlipka 6:7ba288afed38 24 #include "sed1335text.h"
hlipka 6:7ba288afed38 25
hlipka 6:7ba288afed38 26 #include "BusOut.h"
hlipka 6:7ba288afed38 27 #include "DigitalOut.h"
hlipka 6:7ba288afed38 28 #include "wait_api.h"
hlipka 6:7ba288afed38 29
hlipka 7:b472970bd8f6 30 #define FIRSTBANK_MEM 0
hlipka 7:b472970bd8f6 31 #define SECONDBANK_MEM 0x1000
hlipka 7:b472970bd8f6 32 #define THIRDBANK_MEM 0x800
hlipka 7:b472970bd8f6 33
hlipka 7:b472970bd8f6 34 #define HIGH(x) ((x&0xff00)>>8)
hlipka 7:b472970bd8f6 35 #define LOW(x) (x&0xff)
hlipka 7:b472970bd8f6 36
hlipka 6:7ba288afed38 37 void SED1335TextLCD::writeText(const unsigned int column, const unsigned int row, const char text[]) {
hlipka 6:7ba288afed38 38 int i=0;
hlipka 6:7ba288afed38 39
hlipka 6:7ba288afed38 40 int pos=row*getColumns()+column;
hlipka 6:7ba288afed38 41
hlipka 6:7ba288afed38 42 sendCmd(0x46); // set cursor addr
hlipka 7:b472970bd8f6 43 sendData(LOW(pos));
hlipka 7:b472970bd8f6 44 sendData(HIGH(pos));
hlipka 6:7ba288afed38 45
hlipka 6:7ba288afed38 46 sendCmd(0x42);
hlipka 6:7ba288afed38 47 while (text[i]!=0) {
hlipka 6:7ba288afed38 48 sendData(text[i]);
hlipka 6:7ba288afed38 49 i++;
hlipka 6:7ba288afed38 50 }
hlipka 6:7ba288afed38 51 }
hlipka 6:7ba288afed38 52
hlipka 7:b472970bd8f6 53 void SED1335TextLCD::clearBank(int start, int size, int data) {
hlipka 6:7ba288afed38 54 sendCmd(0x46); // set cursor addr
hlipka 7:b472970bd8f6 55 sendData(LOW(start)); // start of RAM
hlipka 7:b472970bd8f6 56 sendData(HIGH(start));
hlipka 6:7ba288afed38 57 wait_ms(1);
hlipka 6:7ba288afed38 58
hlipka 6:7ba288afed38 59 sendCmd(0x42); // write to memory
hlipka 7:b472970bd8f6 60 for (int i=0;i<size;i++)
hlipka 7:b472970bd8f6 61 sendData(data); // send space
hlipka 6:7ba288afed38 62 wait_ms(1);
hlipka 7:b472970bd8f6 63 }
hlipka 6:7ba288afed38 64
hlipka 7:b472970bd8f6 65 void SED1335TextLCD::clear() {
hlipka 7:b472970bd8f6 66 _guard->take();
hlipka 7:b472970bd8f6 67
hlipka 7:b472970bd8f6 68 clearBank(FIRSTBANK_MEM,getColumns()*getRows(),0x20);
hlipka 7:b472970bd8f6 69 clearBank(SECONDBANK_MEM,getColumns()*getRows()*8,0);
hlipka 7:b472970bd8f6 70 clearBank(THIRDBANK_MEM,getColumns()*getRows(),0);
hlipka 6:7ba288afed38 71
hlipka 6:7ba288afed38 72 _guard->release();
hlipka 6:7ba288afed38 73 }
hlipka 6:7ba288afed38 74
hlipka 6:7ba288afed38 75
hlipka 6:7ba288afed38 76 void SED1335TextLCD::character(int column, int row, int c){
hlipka 6:7ba288afed38 77 _guard->take();
hlipka 6:7ba288afed38 78 _guard->release();
hlipka 6:7ba288afed38 79 }
hlipka 6:7ba288afed38 80
hlipka 6:7ba288afed38 81 SED1335TextLCD::SED1335TextLCD
hlipka 6:7ba288afed38 82 (const unsigned int columns, const unsigned int rows, BusOut *data, const PinName read, const PinName write, const PinName cs, const PinName a0, const PinName reset)
hlipka 6:7ba288afed38 83 :TextLCDBase(columns, rows) {
hlipka 6:7ba288afed38 84 _data=data;
hlipka 6:7ba288afed38 85 _rd=new DigitalOut(read);
hlipka 6:7ba288afed38 86 _wr=new DigitalOut(write);
hlipka 6:7ba288afed38 87 _a0=new DigitalOut(a0);
hlipka 6:7ba288afed38 88 _cs=new DigitalOut(cs);
hlipka 6:7ba288afed38 89 _reset=new DigitalOut(reset);
hlipka 6:7ba288afed38 90 wait_ms(10);
hlipka 6:7ba288afed38 91 }
hlipka 6:7ba288afed38 92
hlipka 6:7ba288afed38 93 void SED1335TextLCD::init() {
hlipka 6:7ba288afed38 94 _reset->write(0);
hlipka 6:7ba288afed38 95 wait_ms(2);
hlipka 6:7ba288afed38 96 _reset->write(1);
hlipka 6:7ba288afed38 97 wait_ms(10);
hlipka 6:7ba288afed38 98
hlipka 6:7ba288afed38 99 sendCmd(0x40); // SYSTEM SET
hlipka 6:7ba288afed38 100 sendData(0x30); // p1 set cg rom
hlipka 6:7ba288afed38 101 sendData(0x87); // p2
hlipka 6:7ba288afed38 102 sendData(0x7); // p3
hlipka 7:b472970bd8f6 103 sendData(getColumns()-1); // p4
hlipka 7:b472970bd8f6 104 sendData(getColumns()+3); // p5
hlipka 6:7ba288afed38 105 sendData(0xef); // p6
hlipka 7:b472970bd8f6 106 sendData(getColumns()); // p7
hlipka 6:7ba288afed38 107 sendData(0x0); // p8
hlipka 6:7ba288afed38 108 wait_ms(1);
hlipka 6:7ba288afed38 109
hlipka 6:7ba288afed38 110 sendCmd(0x44); // SCROLL
hlipka 7:b472970bd8f6 111 sendData(LOW(FIRSTBANK_MEM)); // first block
hlipka 7:b472970bd8f6 112 sendData(HIGH(FIRSTBANK_MEM));
hlipka 7:b472970bd8f6 113 sendData(getRows()*8); // lines
hlipka 7:b472970bd8f6 114 sendData(LOW(SECONDBANK_MEM)); // second block
hlipka 7:b472970bd8f6 115 sendData(HIGH(SECONDBANK_MEM));
hlipka 7:b472970bd8f6 116 sendData(getRows()*8); // lines
hlipka 7:b472970bd8f6 117 sendData(LOW(THIRDBANK_MEM)); // third block at 0x800
hlipka 7:b472970bd8f6 118 sendData(HIGH(THIRDBANK_MEM));
hlipka 6:7ba288afed38 119 wait_ms(1);
hlipka 6:7ba288afed38 120
hlipka 6:7ba288afed38 121 sendCmd(0x5a); // HDOT SCR
hlipka 6:7ba288afed38 122 sendData(0x0);
hlipka 6:7ba288afed38 123
hlipka 6:7ba288afed38 124
hlipka 6:7ba288afed38 125 sendCmd(0x5b); // OVLAY
hlipka 6:7ba288afed38 126 sendData(0x01); // 2 layers, text, x-or
hlipka 6:7ba288afed38 127 wait_ms(1);
hlipka 6:7ba288afed38 128
hlipka 6:7ba288afed38 129 sendCmd(0x59); // DISP on
hlipka 6:7ba288afed38 130 sendData(0x54); // all layers on, cursor off
hlipka 6:7ba288afed38 131 // sendData(0x56); // all layers on, cursor flashing
hlipka 6:7ba288afed38 132 wait_ms(1);
hlipka 6:7ba288afed38 133
hlipka 6:7ba288afed38 134 clear();
hlipka 6:7ba288afed38 135
hlipka 6:7ba288afed38 136 sendCmd(0x5d); // CSR FORM
hlipka 6:7ba288afed38 137 sendData(0x04); // 8 pixels wide
hlipka 6:7ba288afed38 138 sendData(0x86); // 2 pixel high, block cursor
hlipka 6:7ba288afed38 139 wait_ms(1);
hlipka 6:7ba288afed38 140
hlipka 6:7ba288afed38 141 sendCmd(0x4c); // CSR DIR right
hlipka 6:7ba288afed38 142 wait_ms(1);
hlipka 6:7ba288afed38 143
hlipka 6:7ba288afed38 144 }
hlipka 6:7ba288afed38 145
hlipka 6:7ba288afed38 146 void SED1335TextLCD::sendCmd(const unsigned char cmd) {
hlipka 6:7ba288afed38 147 _rd->write(1);
hlipka 6:7ba288afed38 148 _wr->write(1);
hlipka 6:7ba288afed38 149 _a0->write(1);
hlipka 6:7ba288afed38 150 _cs->write(0);
hlipka 6:7ba288afed38 151 // address setup time is 0
hlipka 6:7ba288afed38 152 sendByte(cmd);
hlipka 6:7ba288afed38 153 wait_us(10);
hlipka 6:7ba288afed38 154 }
hlipka 6:7ba288afed38 155
hlipka 6:7ba288afed38 156 void SED1335TextLCD::sendData(const unsigned char cmd) {
hlipka 6:7ba288afed38 157 _rd->write(1);
hlipka 6:7ba288afed38 158 _wr->write(1);
hlipka 6:7ba288afed38 159 _a0->write(0);
hlipka 6:7ba288afed38 160 _cs->write(0);
hlipka 6:7ba288afed38 161 // address setup time is 0
hlipka 6:7ba288afed38 162 sendByte(cmd);
hlipka 6:7ba288afed38 163 wait_us(10);
hlipka 6:7ba288afed38 164 }
hlipka 6:7ba288afed38 165
hlipka 6:7ba288afed38 166 void SED1335TextLCD::sendByte(const unsigned char byte) {
hlipka 6:7ba288afed38 167 // display reads with rising flank of /wr
hlipka 6:7ba288afed38 168 // first, set data, then set /wr low (no timing needed)
hlipka 6:7ba288afed38 169 _data->write(byte);
hlipka 6:7ba288afed38 170 _wr->write(0);
hlipka 6:7ba288afed38 171 // wait for setup
hlipka 6:7ba288afed38 172 wait_us(1);
hlipka 6:7ba288afed38 173 // set /wr back to high
hlipka 6:7ba288afed38 174 _wr->write(1);
hlipka 6:7ba288afed38 175 // address / data hold time is 10 / 5 ns, so its handled by executing normal code :)
hlipka 6:7ba288afed38 176 }