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Shinichiro Nakamura / Mbed 2 deprecated StarBoardOrangeExample1

StarBoard Orange - Example application No.1 GoogleChartLogger with StarBoard Orange

extlib/TextLCD.cpp@1:123eff9ba7b2, 2010-08-11 (annotated)

Committer:: shintamainjp
Date:: Wed Aug 11 10:24:25 2010 +0000
Revision:: 1:123eff9ba7b2
Parent:: 0:77d8b45a8f42

Who changed what in which revision?

User	Revision	Line number	New contents of line
shintamainjp	0:77d8b45a8f42	1	/* mbed TextLCD Library, for a 4-bit LCD based on HD44780
shintamainjp	0:77d8b45a8f42	2	* Copyright (c) 2007-2010, sford
shintamainjp	0:77d8b45a8f42	3	*
shintamainjp	0:77d8b45a8f42	4	* Permission is hereby granted, free of charge, to any person obtaining a copy
shintamainjp	0:77d8b45a8f42	5	* of this software and associated documentation files (the "Software"), to deal
shintamainjp	0:77d8b45a8f42	6	* in the Software without restriction, including without limitation the rights
shintamainjp	0:77d8b45a8f42	7	* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
shintamainjp	0:77d8b45a8f42	8	* copies of the Software, and to permit persons to whom the Software is
shintamainjp	0:77d8b45a8f42	9	* furnished to do so, subject to the following conditions:
shintamainjp	0:77d8b45a8f42	10	*
shintamainjp	0:77d8b45a8f42	11	* The above copyright notice and this permission notice shall be included in
shintamainjp	0:77d8b45a8f42	12	* all copies or substantial portions of the Software.
shintamainjp	0:77d8b45a8f42	13	*
shintamainjp	0:77d8b45a8f42	14	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
shintamainjp	0:77d8b45a8f42	15	* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
shintamainjp	0:77d8b45a8f42	16	* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
shintamainjp	0:77d8b45a8f42	17	* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
shintamainjp	0:77d8b45a8f42	18	* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
shintamainjp	0:77d8b45a8f42	19	* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
shintamainjp	0:77d8b45a8f42	20	* THE SOFTWARE.
shintamainjp	0:77d8b45a8f42	21	*/
shintamainjp	0:77d8b45a8f42	22
shintamainjp	0:77d8b45a8f42	23	/*
shintamainjp	0:77d8b45a8f42	24	* Modified for star board orange by Shinichiro Nakamura. (CuBeatSystems)
shintamainjp	0:77d8b45a8f42	25	*
shintamainjp	0:77d8b45a8f42	26	* ID : shintamainjp
shintamainjp	0:77d8b45a8f42	27	* Added : RW-
shintamainjp	0:77d8b45a8f42	28	*/
shintamainjp	0:77d8b45a8f42	29
shintamainjp	0:77d8b45a8f42	30	#include "TextLCD.h"
shintamainjp	0:77d8b45a8f42	31	#include "mbed.h"
shintamainjp	0:77d8b45a8f42	32
shintamainjp	0:77d8b45a8f42	33	TextLCD::TextLCD(PinName rs, PinName rw, PinName e, PinName d0, PinName d1,
shintamainjp	0:77d8b45a8f42	34	PinName d2, PinName d3, LCDType type) : _rs(rs), _rw(rw),
shintamainjp	0:77d8b45a8f42	35	_e(e), _d(d0, d1, d2, d3),
shintamainjp	0:77d8b45a8f42	36	_type(type) {
shintamainjp	0:77d8b45a8f42	37
shintamainjp	0:77d8b45a8f42	38	_e = 1;
shintamainjp	0:77d8b45a8f42	39	_rs = 0; // command mode
shintamainjp	0:77d8b45a8f42	40	_rw = 0;
shintamainjp	0:77d8b45a8f42	41
shintamainjp	0:77d8b45a8f42	42	wait(0.015); // Wait 15ms to ensure powered up
shintamainjp	0:77d8b45a8f42	43
shintamainjp	0:77d8b45a8f42	44	// send "Display Settings" 3 times (Only top nibble of 0x30 as we've got 4-bit bus)
shintamainjp	0:77d8b45a8f42	45	for (int i=0; i<3; i++) {
shintamainjp	0:77d8b45a8f42	46	writeByte(0x3);
shintamainjp	0:77d8b45a8f42	47	wait(0.00164); // this command takes 1.64ms, so wait for it
shintamainjp	0:77d8b45a8f42	48	}
shintamainjp	0:77d8b45a8f42	49	writeByte(0x2); // 4-bit mode
shintamainjp	0:77d8b45a8f42	50	wait(0.000040f); // most instructions take 40us
shintamainjp	0:77d8b45a8f42	51
shintamainjp	0:77d8b45a8f42	52	writeCommand(0x28); // Function set 001 BW N F - -
shintamainjp	0:77d8b45a8f42	53	writeCommand(0x0C);
shintamainjp	0:77d8b45a8f42	54	writeCommand(0x6); // Cursor Direction and Display Shift : 0000 01 CD S (CD 0-left, 1-right S(hift) 0-no, 1-yes
shintamainjp	0:77d8b45a8f42	55	cls();
shintamainjp	0:77d8b45a8f42	56	}
shintamainjp	0:77d8b45a8f42	57
shintamainjp	0:77d8b45a8f42	58	void TextLCD::character(int column, int row, int c) {
shintamainjp	0:77d8b45a8f42	59	int a = address(column, row);
shintamainjp	0:77d8b45a8f42	60	writeCommand(a);
shintamainjp	0:77d8b45a8f42	61	writeData(c);
shintamainjp	0:77d8b45a8f42	62	}
shintamainjp	0:77d8b45a8f42	63
shintamainjp	0:77d8b45a8f42	64	void TextLCD::cls() {
shintamainjp	0:77d8b45a8f42	65	writeCommand(0x01); // cls, and set cursor to 0
shintamainjp	0:77d8b45a8f42	66	wait(0.00164f); // This command takes 1.64 ms
shintamainjp	0:77d8b45a8f42	67	locate(0, 0);
shintamainjp	0:77d8b45a8f42	68	}
shintamainjp	0:77d8b45a8f42	69
shintamainjp	0:77d8b45a8f42	70	void TextLCD::locate(int column, int row) {
shintamainjp	0:77d8b45a8f42	71	_column = column;
shintamainjp	0:77d8b45a8f42	72	_row = row;
shintamainjp	0:77d8b45a8f42	73	}
shintamainjp	0:77d8b45a8f42	74
shintamainjp	0:77d8b45a8f42	75	int TextLCD::_putc(int value) {
shintamainjp	0:77d8b45a8f42	76	if (value == '\n') {
shintamainjp	0:77d8b45a8f42	77	_column = 0;
shintamainjp	0:77d8b45a8f42	78	_row++;
shintamainjp	0:77d8b45a8f42	79	if (_row >= rows()) {
shintamainjp	0:77d8b45a8f42	80	_row = 0;
shintamainjp	0:77d8b45a8f42	81	}
shintamainjp	0:77d8b45a8f42	82	} else {
shintamainjp	0:77d8b45a8f42	83	character(_column, _row, value);
shintamainjp	0:77d8b45a8f42	84	_column++;
shintamainjp	0:77d8b45a8f42	85	if (_column >= columns()) {
shintamainjp	0:77d8b45a8f42	86	_column = 0;
shintamainjp	0:77d8b45a8f42	87	_row++;
shintamainjp	0:77d8b45a8f42	88	if (_row >= rows()) {
shintamainjp	0:77d8b45a8f42	89	_row = 0;
shintamainjp	0:77d8b45a8f42	90	}
shintamainjp	0:77d8b45a8f42	91	}
shintamainjp	0:77d8b45a8f42	92	}
shintamainjp	0:77d8b45a8f42	93	return value;
shintamainjp	0:77d8b45a8f42	94	}
shintamainjp	0:77d8b45a8f42	95
shintamainjp	0:77d8b45a8f42	96	int TextLCD::_getc() {
shintamainjp	0:77d8b45a8f42	97	return -1;
shintamainjp	0:77d8b45a8f42	98	}
shintamainjp	0:77d8b45a8f42	99
shintamainjp	0:77d8b45a8f42	100	void TextLCD::writeByte(int value) {
shintamainjp	0:77d8b45a8f42	101	_d = value >> 4;
shintamainjp	0:77d8b45a8f42	102	wait(0.000040f); // most instructions take 40us
shintamainjp	0:77d8b45a8f42	103	_e = 0;
shintamainjp	0:77d8b45a8f42	104	wait(0.000040f);
shintamainjp	0:77d8b45a8f42	105	_e = 1;
shintamainjp	0:77d8b45a8f42	106	_d = value >> 0;
shintamainjp	0:77d8b45a8f42	107	wait(0.000040f);
shintamainjp	0:77d8b45a8f42	108	_e = 0;
shintamainjp	0:77d8b45a8f42	109	wait(0.000040f); // most instructions take 40us
shintamainjp	0:77d8b45a8f42	110	_e = 1;
shintamainjp	0:77d8b45a8f42	111	}
shintamainjp	0:77d8b45a8f42	112
shintamainjp	0:77d8b45a8f42	113	void TextLCD::writeCommand(int command) {
shintamainjp	0:77d8b45a8f42	114	_rs = 0;
shintamainjp	0:77d8b45a8f42	115	writeByte(command);
shintamainjp	0:77d8b45a8f42	116	}
shintamainjp	0:77d8b45a8f42	117
shintamainjp	0:77d8b45a8f42	118	void TextLCD::writeData(int data) {
shintamainjp	0:77d8b45a8f42	119	_rs = 1;
shintamainjp	0:77d8b45a8f42	120	writeByte(data);
shintamainjp	0:77d8b45a8f42	121	}
shintamainjp	0:77d8b45a8f42	122
shintamainjp	0:77d8b45a8f42	123	int TextLCD::address(int column, int row) {
shintamainjp	0:77d8b45a8f42	124	switch (_type) {
shintamainjp	0:77d8b45a8f42	125	case LCD20x4:
shintamainjp	0:77d8b45a8f42	126	switch (row) {
shintamainjp	0:77d8b45a8f42	127	case 0:
shintamainjp	0:77d8b45a8f42	128	return 0x80 + column;
shintamainjp	0:77d8b45a8f42	129	case 1:
shintamainjp	0:77d8b45a8f42	130	return 0xc0 + column;
shintamainjp	0:77d8b45a8f42	131	case 2:
shintamainjp	0:77d8b45a8f42	132	return 0x94 + column;
shintamainjp	0:77d8b45a8f42	133	case 3:
shintamainjp	0:77d8b45a8f42	134	return 0xd4 + column;
shintamainjp	0:77d8b45a8f42	135	}
shintamainjp	0:77d8b45a8f42	136	case LCD16x2B:
shintamainjp	0:77d8b45a8f42	137	return 0x80 + (row * 40) + column;
shintamainjp	0:77d8b45a8f42	138	case LCD16x2:
shintamainjp	0:77d8b45a8f42	139	case LCD20x2:
shintamainjp	0:77d8b45a8f42	140	default:
shintamainjp	0:77d8b45a8f42	141	return 0x80 + (row * 0x40) + column;
shintamainjp	0:77d8b45a8f42	142	}
shintamainjp	0:77d8b45a8f42	143	}
shintamainjp	0:77d8b45a8f42	144
shintamainjp	0:77d8b45a8f42	145	int TextLCD::columns() {
shintamainjp	0:77d8b45a8f42	146	switch (_type) {
shintamainjp	0:77d8b45a8f42	147	case LCD20x4:
shintamainjp	0:77d8b45a8f42	148	case LCD20x2:
shintamainjp	0:77d8b45a8f42	149	return 20;
shintamainjp	0:77d8b45a8f42	150	case LCD16x2:
shintamainjp	0:77d8b45a8f42	151	case LCD16x2B:
shintamainjp	0:77d8b45a8f42	152	default:
shintamainjp	0:77d8b45a8f42	153	return 16;
shintamainjp	0:77d8b45a8f42	154	}
shintamainjp	0:77d8b45a8f42	155	}
shintamainjp	0:77d8b45a8f42	156
shintamainjp	0:77d8b45a8f42	157	int TextLCD::rows() {
shintamainjp	0:77d8b45a8f42	158	switch (_type) {
shintamainjp	0:77d8b45a8f42	159	case LCD20x4:
shintamainjp	0:77d8b45a8f42	160	return 4;
shintamainjp	0:77d8b45a8f42	161	case LCD16x2:
shintamainjp	0:77d8b45a8f42	162	case LCD16x2B:
shintamainjp	0:77d8b45a8f42	163	case LCD20x2:
shintamainjp	0:77d8b45a8f42	164	default:
shintamainjp	0:77d8b45a8f42	165	return 2;
shintamainjp	0:77d8b45a8f42	166	}
shintamainjp	0:77d8b45a8f42	167	}

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Type:	Program
Mbed OS support:	Mbed 2 deprecated
Created:	11 Aug 2010
Imports:	229
Forks:	0
Commits:	2
Dependents:	0
Dependencies:	3
Followers:	10

extlib/TextLCD.cpp@1:123eff9ba7b2, 2010-08-11 (annotated)

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