LCD_Hiragana - mbed/ARM 活用事例第2章キャラクタLCDを極めよう mbedで初めてのマイコン開発 L…

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Tadao Iida / Mbed 2 deprecated LCD_Hiragana

mbed/ARM 活用事例第2章キャラクタLCDを極めよう mbedで初めてのマイコン開発 LCDを極める！<4/5> 文字コード表に載っていない文字や記号を登録し、LCDに表示するプログラムです。自分だけのオリジナル記号を作成し、LCDに表示してみましょう。 http://www.eleki-jack.com/arm/2010/11/mbed-lcd-3.html

Dependencies: mbed

TextLCD/TextLCD.cpp@0:e3313a37353c, 2011-03-02 (annotated)

Committer:: sunifu
Date:: Wed Mar 02 13:38:56 2011 +0000
Revision:: 0:e3313a37353c

Who changed what in which revision?

User	Revision	Line number	New contents of line
sunifu	0:e3313a37353c	1	/* mbed TextLCD Library, for a 4-bit LCD based on HD44780
sunifu	0:e3313a37353c	2	* Copyright (c) 2007-2010, sford
sunifu	0:e3313a37353c	3	*
sunifu	0:e3313a37353c	4	* Permission is hereby granted, free of charge, to any person obtaining a copy
sunifu	0:e3313a37353c	5	* of this software and associated documentation files (the "Software"), to deal
sunifu	0:e3313a37353c	6	* in the Software without restriction, including without limitation the rights
sunifu	0:e3313a37353c	7	* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
sunifu	0:e3313a37353c	8	* copies of the Software, and to permit persons to whom the Software is
sunifu	0:e3313a37353c	9	* furnished to do so, subject to the following conditions:
sunifu	0:e3313a37353c	10	*
sunifu	0:e3313a37353c	11	* The above copyright notice and this permission notice shall be included in
sunifu	0:e3313a37353c	12	* all copies or substantial portions of the Software.
sunifu	0:e3313a37353c	13	*
sunifu	0:e3313a37353c	14	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
sunifu	0:e3313a37353c	15	* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
sunifu	0:e3313a37353c	16	* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
sunifu	0:e3313a37353c	17	* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
sunifu	0:e3313a37353c	18	* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
sunifu	0:e3313a37353c	19	* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
sunifu	0:e3313a37353c	20	* THE SOFTWARE.
sunifu	0:e3313a37353c	21	*/
sunifu	0:e3313a37353c	22
sunifu	0:e3313a37353c	23	#include "TextLCD.h"
sunifu	0:e3313a37353c	24	#include "mbed.h"
sunifu	0:e3313a37353c	25
sunifu	0:e3313a37353c	26	TextLCD::TextLCD(PinName rs, PinName e, PinName d0, PinName d1,
sunifu	0:e3313a37353c	27	PinName d2, PinName d3, LCDType type) : _rs(rs),
sunifu	0:e3313a37353c	28	_e(e), _d(d0, d1, d2, d3),
sunifu	0:e3313a37353c	29	_type(type) {
sunifu	0:e3313a37353c	30
sunifu	0:e3313a37353c	31	_e = 1;
sunifu	0:e3313a37353c	32	_rs = 0; // command mode
sunifu	0:e3313a37353c	33
sunifu	0:e3313a37353c	34	wait(0.015); // Wait 15ms to ensure powered up
sunifu	0:e3313a37353c	35
sunifu	0:e3313a37353c	36	// send "Display Settings" 3 times (Only top nibble of 0x30 as we've got 4-bit bus)
sunifu	0:e3313a37353c	37	for (int i=0; i<3; i++) {
sunifu	0:e3313a37353c	38	writeByte(0x3);
sunifu	0:e3313a37353c	39	wait(0.00164); // this command takes 1.64ms, so wait for it
sunifu	0:e3313a37353c	40	}
sunifu	0:e3313a37353c	41	writeByte(0x2); // 4-bit mode
sunifu	0:e3313a37353c	42	wait(0.000040f); // most instructions take 40us
sunifu	0:e3313a37353c	43
sunifu	0:e3313a37353c	44	writeCommand(0x28); // Function set 001 BW N F - -
sunifu	0:e3313a37353c	45	writeCommand(0x0C);
sunifu	0:e3313a37353c	46	writeCommand(0x6); // Cursor Direction and Display Shift : 0000 01 CD S (CD 0-left, 1-right S(hift) 0-no, 1-yes
sunifu	0:e3313a37353c	47	cls();
sunifu	0:e3313a37353c	48	}
sunifu	0:e3313a37353c	49
sunifu	0:e3313a37353c	50	void TextLCD::character(int column, int row, int c) {
sunifu	0:e3313a37353c	51	int a = address(column, row);
sunifu	0:e3313a37353c	52	writeCommand(a);
sunifu	0:e3313a37353c	53	writeData(c);
sunifu	0:e3313a37353c	54	}
sunifu	0:e3313a37353c	55
sunifu	0:e3313a37353c	56	void TextLCD::cls() {
sunifu	0:e3313a37353c	57	writeCommand(0x01); // cls, and set cursor to 0
sunifu	0:e3313a37353c	58	wait(0.00164f); // This command takes 1.64 ms
sunifu	0:e3313a37353c	59	locate(0, 0);
sunifu	0:e3313a37353c	60	}
sunifu	0:e3313a37353c	61
sunifu	0:e3313a37353c	62	void TextLCD::locate(int column, int row) {
sunifu	0:e3313a37353c	63	_column = column;
sunifu	0:e3313a37353c	64	_row = row;
sunifu	0:e3313a37353c	65	}
sunifu	0:e3313a37353c	66
sunifu	0:e3313a37353c	67	int TextLCD::_putc(int value) {
sunifu	0:e3313a37353c	68	if (value == '\n') {
sunifu	0:e3313a37353c	69	_column = 0;
sunifu	0:e3313a37353c	70	_row++;
sunifu	0:e3313a37353c	71	if (_row >= rows()) {
sunifu	0:e3313a37353c	72	_row = 0;
sunifu	0:e3313a37353c	73	}
sunifu	0:e3313a37353c	74	} else {
sunifu	0:e3313a37353c	75	character(_column, _row, value);
sunifu	0:e3313a37353c	76	_column++;
sunifu	0:e3313a37353c	77	if (_column >= columns()) {
sunifu	0:e3313a37353c	78	_column = 0;
sunifu	0:e3313a37353c	79	_row++;
sunifu	0:e3313a37353c	80	if (_row >= rows()) {
sunifu	0:e3313a37353c	81	_row = 0;
sunifu	0:e3313a37353c	82	}
sunifu	0:e3313a37353c	83	}
sunifu	0:e3313a37353c	84	}
sunifu	0:e3313a37353c	85	return value;
sunifu	0:e3313a37353c	86	}
sunifu	0:e3313a37353c	87
sunifu	0:e3313a37353c	88	int TextLCD::_getc() {
sunifu	0:e3313a37353c	89	return -1;
sunifu	0:e3313a37353c	90	}
sunifu	0:e3313a37353c	91
sunifu	0:e3313a37353c	92	void TextLCD::writeByte(int value) {
sunifu	0:e3313a37353c	93	_d = value >> 4;
sunifu	0:e3313a37353c	94	wait(0.000040f); // most instructions take 40us
sunifu	0:e3313a37353c	95	_e = 0;
sunifu	0:e3313a37353c	96	wait(0.000040f);
sunifu	0:e3313a37353c	97	_e = 1;
sunifu	0:e3313a37353c	98	_d = value >> 0;
sunifu	0:e3313a37353c	99	wait(0.000040f);
sunifu	0:e3313a37353c	100	_e = 0;
sunifu	0:e3313a37353c	101	wait(0.000040f); // most instructions take 40us
sunifu	0:e3313a37353c	102	_e = 1;
sunifu	0:e3313a37353c	103	}
sunifu	0:e3313a37353c	104
sunifu	0:e3313a37353c	105	void TextLCD::writeCommand(int command) {
sunifu	0:e3313a37353c	106	_rs = 0;
sunifu	0:e3313a37353c	107	writeByte(command);
sunifu	0:e3313a37353c	108	}
sunifu	0:e3313a37353c	109
sunifu	0:e3313a37353c	110	void TextLCD::writeData(int data) {
sunifu	0:e3313a37353c	111	_rs = 1;
sunifu	0:e3313a37353c	112	writeByte(data);
sunifu	0:e3313a37353c	113	}
sunifu	0:e3313a37353c	114
sunifu	0:e3313a37353c	115	int TextLCD::address(int column, int row) {
sunifu	0:e3313a37353c	116	switch (_type) {
sunifu	0:e3313a37353c	117	case LCD20x4:
sunifu	0:e3313a37353c	118	switch (row) {
sunifu	0:e3313a37353c	119	case 0:
sunifu	0:e3313a37353c	120	return 0x80 + column;
sunifu	0:e3313a37353c	121	case 1:
sunifu	0:e3313a37353c	122	return 0xc0 + column;
sunifu	0:e3313a37353c	123	case 2:
sunifu	0:e3313a37353c	124	return 0x94 + column;
sunifu	0:e3313a37353c	125	case 3:
sunifu	0:e3313a37353c	126	return 0xd4 + column;
sunifu	0:e3313a37353c	127	}
sunifu	0:e3313a37353c	128	case LCD16x2B:
sunifu	0:e3313a37353c	129	return 0x80 + (row * 40) + column;
sunifu	0:e3313a37353c	130	case LCD16x2:
sunifu	0:e3313a37353c	131	case LCD20x2:
sunifu	0:e3313a37353c	132	default:
sunifu	0:e3313a37353c	133	return 0x80 + (row * 0x40) + column;
sunifu	0:e3313a37353c	134	}
sunifu	0:e3313a37353c	135	}
sunifu	0:e3313a37353c	136
sunifu	0:e3313a37353c	137	int TextLCD::columns() {
sunifu	0:e3313a37353c	138	switch (_type) {
sunifu	0:e3313a37353c	139	case LCD20x4:
sunifu	0:e3313a37353c	140	case LCD20x2:
sunifu	0:e3313a37353c	141	return 20;
sunifu	0:e3313a37353c	142	case LCD16x2:
sunifu	0:e3313a37353c	143	case LCD16x2B:
sunifu	0:e3313a37353c	144	default:
sunifu	0:e3313a37353c	145	return 16;
sunifu	0:e3313a37353c	146	}
sunifu	0:e3313a37353c	147	}
sunifu	0:e3313a37353c	148
sunifu	0:e3313a37353c	149	int TextLCD::rows() {
sunifu	0:e3313a37353c	150	switch (_type) {
sunifu	0:e3313a37353c	151	case LCD20x4:
sunifu	0:e3313a37353c	152	return 4;
sunifu	0:e3313a37353c	153	case LCD16x2:
sunifu	0:e3313a37353c	154	case LCD16x2B:
sunifu	0:e3313a37353c	155	case LCD20x2:
sunifu	0:e3313a37353c	156	default:
sunifu	0:e3313a37353c	157	return 2;
sunifu	0:e3313a37353c	158	}
sunifu	0:e3313a37353c	159	}

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Type:	Program
Mbed OS support:	Mbed 2 deprecated
Created:	02 Mar 2011
Imports:	11
Forks:	0
Commits:	1
Dependents:	0
Dependencies:	1
Followers:	1

TextLCD/TextLCD.cpp@0:e3313a37353c, 2011-03-02 (annotated)

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