Sean Cassidy / PCF2119

PCF2119 library for I/O board

Fork of PCF2119 by Suga koubou

PCF2119.cpp@10:d13717a53fe0, 2017-10-25 (annotated)

Committer:
sc1951
Date:
Wed Oct 25 14:51:09 2017 +0000
Revision:
10:d13717a53fe0
Parent:
9:27f430d086f3 
Added LCD library

Who changed what in which revision?

UserRevisionLine numberNew contents of line
okini3939 9:27f430d086f3 1 /* PCF2119x based I2C LCD Library
okini3939 9:27f430d086f3 2 * Copyright (c) 2014, Hiroshi Suga
okini3939 9:27f430d086f3 3 */
simon 1:ac48b187213c 4 /* mbed TextLCD Library, for a 4-bit LCD based on HD44780
simon 6:e4cb7ddee0d3 5 * Copyright (c) 2007-2010, sford, http://mbed.org
simon 1:ac48b187213c 6 *
simon 1:ac48b187213c 7 * Permission is hereby granted, free of charge, to any person obtaining a copy
simon 1:ac48b187213c 8 * of this software and associated documentation files (the "Software"), to deal
simon 1:ac48b187213c 9 * in the Software without restriction, including without limitation the rights
simon 1:ac48b187213c 10 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
simon 1:ac48b187213c 11 * copies of the Software, and to permit persons to whom the Software is
simon 1:ac48b187213c 12 * furnished to do so, subject to the following conditions:
simon 1:ac48b187213c 13 *
simon 1:ac48b187213c 14 * The above copyright notice and this permission notice shall be included in
simon 1:ac48b187213c 15 * all copies or substantial portions of the Software.
simon 1:ac48b187213c 16 *
simon 1:ac48b187213c 17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
simon 1:ac48b187213c 18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
simon 1:ac48b187213c 19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
simon 1:ac48b187213c 20 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
simon 1:ac48b187213c 21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
simon 1:ac48b187213c 22 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
simon 1:ac48b187213c 23 * THE SOFTWARE.
simon 1:ac48b187213c 24 */
simon 1:ac48b187213c 25
okini3939 9:27f430d086f3 26 #include "PCF2119.h"
simon 1:ac48b187213c 27 #include "mbed.h"
simon 1:ac48b187213c 28
okini3939 9:27f430d086f3 29 PCF2119::PCF2119(PinName sda, PinName sck, PinName reset, LCDType type, char addr) :
okini3939 9:27f430d086f3 30 _i2c(sda, sck), _reset(reset), _type(type), _addr(addr) {
okini3939 9:27f430d086f3 31 init();
okini3939 9:27f430d086f3 32 }
simon 1:ac48b187213c 33
okini3939 9:27f430d086f3 34 PCF2119::PCF2119(I2C &i2c, PinName reset, LCDType type, char addr) :
okini3939 9:27f430d086f3 35 _i2c(i2c), _reset(reset), _type(type), _addr(addr) {
okini3939 9:27f430d086f3 36 init();
okini3939 9:27f430d086f3 37 }
simon 1:ac48b187213c 38
okini3939 9:27f430d086f3 39 void PCF2119::init() {
okini3939 9:27f430d086f3 40 unsigned char buf[12];
okini3939 9:27f430d086f3 41
okini3939 9:27f430d086f3 42 _reset = 1;
okini3939 9:27f430d086f3 43 wait(0.001);
okini3939 9:27f430d086f3 44 _reset = 0;
simon 1:ac48b187213c 45 wait(0.015); // Wait 15ms to ensure powered up
simon 1:ac48b187213c 46
okini3939 9:27f430d086f3 47 raw = 0;
okini3939 9:27f430d086f3 48 buf[0] = 0x00; // CO=0, RS=0
okini3939 9:27f430d086f3 49 buf[1] = 0x34; // Function_set DL=1, M=1, SL=0, (H=0)
okini3939 9:27f430d086f3 50 buf[2] = 0x0c; // Display_ctl D=1, C=1, B=0
okini3939 9:27f430d086f3 51 buf[3] = 0x06; // Entry_mode_set ID=1, S=0
okini3939 9:27f430d086f3 52 buf[4] = 0x35; // Function_set DL=1, M=1, SL=0, (H=1)
okini3939 9:27f430d086f3 53 buf[5] = 0x04; // Disp_conf P=0, Q=0
okini3939 9:27f430d086f3 54 buf[6] = 0x10; // Temp_ctl TC1=0, TC2=0
okini3939 9:27f430d086f3 55 buf[7] = 0x42; // HV_gen S1=1, S2=0
okini3939 9:27f430d086f3 56 buf[8] = 0x9f; // VLCD_set V=0, VA=1f
okini3939 9:27f430d086f3 57 buf[9] = 0x34; // Function_set DL=1, M=1, SL=0, (H=0)
okini3939 9:27f430d086f3 58 buf[10] = 0x80; // set DDRAM
okini3939 9:27f430d086f3 59 buf[11] = 0x02; // Screen_conf L=0
okini3939 9:27f430d086f3 60 _i2c.write(_addr, (char*)buf, 12);
simon 1:ac48b187213c 61 cls();
simon 1:ac48b187213c 62 }
simon 1:ac48b187213c 63
okini3939 9:27f430d086f3 64 void PCF2119::character(int column, int row, int c) {
okini3939 9:27f430d086f3 65 unsigned char buf[2];
okini3939 9:27f430d086f3 66 buf[0] = 0x00; // CO=0, RS=0
okini3939 9:27f430d086f3 67 buf[1] = address(column, row);
okini3939 9:27f430d086f3 68 _i2c.write(_addr, (char*)buf, 2);
simon 1:ac48b187213c 69 writeData(c);
simon 1:ac48b187213c 70 }
simon 1:ac48b187213c 71
okini3939 9:27f430d086f3 72 void PCF2119::cls() {
okini3939 9:27f430d086f3 73 char buf[2];
okini3939 9:27f430d086f3 74 buf[0] = 0x00; // CO=0, RS=0
okini3939 9:27f430d086f3 75 buf[1] = 0x01;
okini3939 9:27f430d086f3 76 _i2c.write(_addr, buf, 2);
simon 1:ac48b187213c 77 locate(0, 0);
simon 1:ac48b187213c 78 }
simon 1:ac48b187213c 79
okini3939 9:27f430d086f3 80 void PCF2119::locate(int column, int row) {
simon 1:ac48b187213c 81 _column = column;
simon 1:ac48b187213c 82 _row = row;
simon 1:ac48b187213c 83 }
simon 1:ac48b187213c 84
okini3939 9:27f430d086f3 85 int PCF2119::_putc(int value) {
simon 1:ac48b187213c 86 if (value == '\n') {
simon 1:ac48b187213c 87 _column = 0;
simon 1:ac48b187213c 88 _row++;
simon 1:ac48b187213c 89 if (_row >= rows()) {
simon 1:ac48b187213c 90 _row = 0;
simon 1:ac48b187213c 91 }
simon 1:ac48b187213c 92 } else {
okini3939 9:27f430d086f3 93 character(_column, _row, ascii2lcd(value));
simon 1:ac48b187213c 94 _column++;
simon 1:ac48b187213c 95 if (_column >= columns()) {
simon 1:ac48b187213c 96 _column = 0;
simon 1:ac48b187213c 97 _row++;
simon 1:ac48b187213c 98 if (_row >= rows()) {
simon 1:ac48b187213c 99 _row = 0;
simon 1:ac48b187213c 100 }
simon 1:ac48b187213c 101 }
simon 1:ac48b187213c 102 }
simon 1:ac48b187213c 103 return value;
simon 1:ac48b187213c 104 }
simon 1:ac48b187213c 105
okini3939 9:27f430d086f3 106 int PCF2119::_getc() {
simon 1:ac48b187213c 107 return -1;
simon 1:ac48b187213c 108 }
simon 1:ac48b187213c 109
okini3939 9:27f430d086f3 110 void PCF2119::writeCommand(int command) {
okini3939 9:27f430d086f3 111 unsigned char buf[2];
okini3939 9:27f430d086f3 112 buf[0] = 0x00; // CO=0, RS=0
okini3939 9:27f430d086f3 113 buf[1] = command;
okini3939 9:27f430d086f3 114 _i2c.write(_addr, (char*)buf, 2);
simon 1:ac48b187213c 115 }
simon 1:ac48b187213c 116
okini3939 9:27f430d086f3 117 void PCF2119::writeData(int data) {
okini3939 9:27f430d086f3 118 unsigned char buf[2];
okini3939 9:27f430d086f3 119 buf[0] = 0x40; // CO=0, RS=1
okini3939 9:27f430d086f3 120 buf[1] = data;
okini3939 9:27f430d086f3 121 _i2c.write(_addr, (char*)buf, 2);
simon 1:ac48b187213c 122 }
simon 1:ac48b187213c 123
okini3939 9:27f430d086f3 124 int PCF2119::address(int column, int row) {
simon 1:ac48b187213c 125 switch (_type) {
simon 1:ac48b187213c 126 case LCD20x4:
simon 1:ac48b187213c 127 switch (row) {
simon 1:ac48b187213c 128 case 0:
simon 1:ac48b187213c 129 return 0x80 + column;
simon 1:ac48b187213c 130 case 1:
simon 1:ac48b187213c 131 return 0xc0 + column;
simon 1:ac48b187213c 132 case 2:
simon 1:ac48b187213c 133 return 0x94 + column;
simon 1:ac48b187213c 134 case 3:
simon 1:ac48b187213c 135 return 0xd4 + column;
simon 1:ac48b187213c 136 }
simon 1:ac48b187213c 137 case LCD16x2B:
simon 4:bf5b706f8d32 138 return 0x80 + (row * 40) + column;
simon 1:ac48b187213c 139 case LCD16x2:
simon 1:ac48b187213c 140 case LCD20x2:
simon 1:ac48b187213c 141 default:
simon 4:bf5b706f8d32 142 return 0x80 + (row * 0x40) + column;
simon 1:ac48b187213c 143 }
simon 1:ac48b187213c 144 }
simon 1:ac48b187213c 145
okini3939 9:27f430d086f3 146 int PCF2119::columns() {
simon 1:ac48b187213c 147 switch (_type) {
simon 1:ac48b187213c 148 case LCD20x4:
simon 1:ac48b187213c 149 case LCD20x2:
simon 1:ac48b187213c 150 return 20;
simon 1:ac48b187213c 151 case LCD16x2:
simon 1:ac48b187213c 152 case LCD16x2B:
simon 1:ac48b187213c 153 default:
simon 1:ac48b187213c 154 return 16;
simon 1:ac48b187213c 155 }
simon 1:ac48b187213c 156 }
simon 1:ac48b187213c 157
okini3939 9:27f430d086f3 158 int PCF2119::rows() {
simon 1:ac48b187213c 159 switch (_type) {
simon 1:ac48b187213c 160 case LCD20x4:
simon 1:ac48b187213c 161 return 4;
simon 1:ac48b187213c 162 case LCD16x2:
simon 1:ac48b187213c 163 case LCD16x2B:
simon 1:ac48b187213c 164 case LCD20x2:
simon 1:ac48b187213c 165 default:
simon 1:ac48b187213c 166 return 2;
simon 1:ac48b187213c 167 }
simon 1:ac48b187213c 168 }
okini3939 9:27f430d086f3 169
okini3939 9:27f430d086f3 170 int PCF2119::ascii2lcd (int c) {
okini3939 9:27f430d086f3 171 if (raw) return c;
okini3939 9:27f430d086f3 172 if (((c >= ' ') && (c <= '?')) || ((c >= 'A') && (c <= 'Z')) || ((c >= 'a') && (c <= 'z'))) {
okini3939 9:27f430d086f3 173 c |= 0x80;
okini3939 9:27f430d086f3 174 } else
okini3939 9:27f430d086f3 175 if (c >= 0xf0 && c <= 0xff) {
okini3939 9:27f430d086f3 176 c &= 0x0f;
okini3939 9:27f430d086f3 177 }
okini3939 9:27f430d086f3 178 return c;
okini3939 9:27f430d086f3 179 }
okini3939 9:27f430d086f3 180
okini3939 9:27f430d086f3 181 void PCF2119::cgram(int num, const char *data, int len) {
okini3939 9:27f430d086f3 182 int i;
okini3939 9:27f430d086f3 183 unsigned char buf[1 + len];
okini3939 9:27f430d086f3 184 buf[0] = 0x00; // CO=0, RS=0
okini3939 9:27f430d086f3 185 buf[1] = 0x80 | (num >= 8 ? 0x40 : 0);
okini3939 9:27f430d086f3 186 _i2c.write(_addr, (char*)buf, 2);
okini3939 9:27f430d086f3 187 buf[0] = 0x00; // CO=0, RS=0
okini3939 9:27f430d086f3 188 buf[1] = 0x40 | (8 * (num % 8));
okini3939 9:27f430d086f3 189 _i2c.write(_addr, (char*)buf, 2);
okini3939 9:27f430d086f3 190 buf[0] = 0x40; // CO=0, RS=1
okini3939 9:27f430d086f3 191 for (i = 0; i < len; i ++) {
okini3939 9:27f430d086f3 192 buf[1 + i] = data[i];
okini3939 9:27f430d086f3 193 }
okini3939 9:27f430d086f3 194 _i2c.write(_addr, (char*)buf, 1 + len);
okini3939 9:27f430d086f3 195 }