DMA_LLI_TEST - LINKED LIST TEST on mbed

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xeye_ atsu / Mbed 2 deprecated DMA_LLI_TEST

LINKED LIST TEST on mbed

TextLCD/TextLCD.cpp@0:e8bfffbb3ab6, 2011-02-26 (annotated)

Committer:: lynxeyed_atsu
Date:: Sat Feb 26 03:55:12 2011 +0000
Revision:: 0:e8bfffbb3ab6

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User	Revision	Line number	New contents of line
lynxeyed_atsu	0:e8bfffbb3ab6	1	/* mbed TextLCD Library, for a 4-bit LCD based on HD44780
lynxeyed_atsu	0:e8bfffbb3ab6	2	* Copyright (c) 2007-2010, sford
lynxeyed_atsu	0:e8bfffbb3ab6	3	*
lynxeyed_atsu	0:e8bfffbb3ab6	4	* Permission is hereby granted, free of charge, to any person obtaining a copy
lynxeyed_atsu	0:e8bfffbb3ab6	5	* of this software and associated documentation files (the "Software"), to deal
lynxeyed_atsu	0:e8bfffbb3ab6	6	* in the Software without restriction, including without limitation the rights
lynxeyed_atsu	0:e8bfffbb3ab6	7	* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
lynxeyed_atsu	0:e8bfffbb3ab6	8	* copies of the Software, and to permit persons to whom the Software is
lynxeyed_atsu	0:e8bfffbb3ab6	9	* furnished to do so, subject to the following conditions:
lynxeyed_atsu	0:e8bfffbb3ab6	10	*
lynxeyed_atsu	0:e8bfffbb3ab6	11	* The above copyright notice and this permission notice shall be included in
lynxeyed_atsu	0:e8bfffbb3ab6	12	* all copies or substantial portions of the Software.
lynxeyed_atsu	0:e8bfffbb3ab6	13	*
lynxeyed_atsu	0:e8bfffbb3ab6	14	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
lynxeyed_atsu	0:e8bfffbb3ab6	15	* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
lynxeyed_atsu	0:e8bfffbb3ab6	16	* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
lynxeyed_atsu	0:e8bfffbb3ab6	17	* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
lynxeyed_atsu	0:e8bfffbb3ab6	18	* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
lynxeyed_atsu	0:e8bfffbb3ab6	19	* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
lynxeyed_atsu	0:e8bfffbb3ab6	20	* THE SOFTWARE.
lynxeyed_atsu	0:e8bfffbb3ab6	21	*/
lynxeyed_atsu	0:e8bfffbb3ab6	22
lynxeyed_atsu	0:e8bfffbb3ab6	23	#include "TextLCD.h"
lynxeyed_atsu	0:e8bfffbb3ab6	24	#include "mbed.h"
lynxeyed_atsu	0:e8bfffbb3ab6	25
lynxeyed_atsu	0:e8bfffbb3ab6	26	TextLCD::TextLCD(PinName rs, PinName e, PinName d0, PinName d1,
lynxeyed_atsu	0:e8bfffbb3ab6	27	PinName d2, PinName d3, LCDType type) : _rs(rs),
lynxeyed_atsu	0:e8bfffbb3ab6	28	_e(e), _d(d0, d1, d2, d3),
lynxeyed_atsu	0:e8bfffbb3ab6	29	_type(type) {
lynxeyed_atsu	0:e8bfffbb3ab6	30
lynxeyed_atsu	0:e8bfffbb3ab6	31	_e = 1;
lynxeyed_atsu	0:e8bfffbb3ab6	32	_rs = 0; // command mode
lynxeyed_atsu	0:e8bfffbb3ab6	33
lynxeyed_atsu	0:e8bfffbb3ab6	34	wait(0.015); // Wait 15ms to ensure powered up
lynxeyed_atsu	0:e8bfffbb3ab6	35
lynxeyed_atsu	0:e8bfffbb3ab6	36	// send "Display Settings" 3 times (Only top nibble of 0x30 as we've got 4-bit bus)
lynxeyed_atsu	0:e8bfffbb3ab6	37	for (int i=0; i<3; i++) {
lynxeyed_atsu	0:e8bfffbb3ab6	38	writeByte(0x3);
lynxeyed_atsu	0:e8bfffbb3ab6	39	wait(0.00164); // this command takes 1.64ms, so wait for it
lynxeyed_atsu	0:e8bfffbb3ab6	40	}
lynxeyed_atsu	0:e8bfffbb3ab6	41	writeByte(0x2); // 4-bit mode
lynxeyed_atsu	0:e8bfffbb3ab6	42	wait(0.000040f); // most instructions take 40us
lynxeyed_atsu	0:e8bfffbb3ab6	43
lynxeyed_atsu	0:e8bfffbb3ab6	44	writeCommand(0x28); // Function set 001 BW N F - -
lynxeyed_atsu	0:e8bfffbb3ab6	45	writeCommand(0x0C);
lynxeyed_atsu	0:e8bfffbb3ab6	46	writeCommand(0x6); // Cursor Direction and Display Shift : 0000 01 CD S (CD 0-left, 1-right S(hift) 0-no, 1-yes
lynxeyed_atsu	0:e8bfffbb3ab6	47	cls();
lynxeyed_atsu	0:e8bfffbb3ab6	48	}
lynxeyed_atsu	0:e8bfffbb3ab6	49
lynxeyed_atsu	0:e8bfffbb3ab6	50	void TextLCD::character(int column, int row, int c) {
lynxeyed_atsu	0:e8bfffbb3ab6	51	int a = address(column, row);
lynxeyed_atsu	0:e8bfffbb3ab6	52	writeCommand(a);
lynxeyed_atsu	0:e8bfffbb3ab6	53	writeData(c);
lynxeyed_atsu	0:e8bfffbb3ab6	54	}
lynxeyed_atsu	0:e8bfffbb3ab6	55
lynxeyed_atsu	0:e8bfffbb3ab6	56	void TextLCD::cls() {
lynxeyed_atsu	0:e8bfffbb3ab6	57	writeCommand(0x01); // cls, and set cursor to 0
lynxeyed_atsu	0:e8bfffbb3ab6	58	wait(0.00164f); // This command takes 1.64 ms
lynxeyed_atsu	0:e8bfffbb3ab6	59	locate(0, 0);
lynxeyed_atsu	0:e8bfffbb3ab6	60	}
lynxeyed_atsu	0:e8bfffbb3ab6	61
lynxeyed_atsu	0:e8bfffbb3ab6	62	void TextLCD::locate(int column, int row) {
lynxeyed_atsu	0:e8bfffbb3ab6	63	_column = column;
lynxeyed_atsu	0:e8bfffbb3ab6	64	_row = row;
lynxeyed_atsu	0:e8bfffbb3ab6	65	}
lynxeyed_atsu	0:e8bfffbb3ab6	66
lynxeyed_atsu	0:e8bfffbb3ab6	67	int TextLCD::_putc(int value) {
lynxeyed_atsu	0:e8bfffbb3ab6	68	if (value == '\n') {
lynxeyed_atsu	0:e8bfffbb3ab6	69	_column = 0;
lynxeyed_atsu	0:e8bfffbb3ab6	70	_row++;
lynxeyed_atsu	0:e8bfffbb3ab6	71	if (_row >= rows()) {
lynxeyed_atsu	0:e8bfffbb3ab6	72	_row = 0;
lynxeyed_atsu	0:e8bfffbb3ab6	73	}
lynxeyed_atsu	0:e8bfffbb3ab6	74	} else {
lynxeyed_atsu	0:e8bfffbb3ab6	75	character(_column, _row, value);
lynxeyed_atsu	0:e8bfffbb3ab6	76	_column++;
lynxeyed_atsu	0:e8bfffbb3ab6	77	if (_column >= columns()) {
lynxeyed_atsu	0:e8bfffbb3ab6	78	_column = 0;
lynxeyed_atsu	0:e8bfffbb3ab6	79	_row++;
lynxeyed_atsu	0:e8bfffbb3ab6	80	if (_row >= rows()) {
lynxeyed_atsu	0:e8bfffbb3ab6	81	_row = 0;
lynxeyed_atsu	0:e8bfffbb3ab6	82	}
lynxeyed_atsu	0:e8bfffbb3ab6	83	}
lynxeyed_atsu	0:e8bfffbb3ab6	84	}
lynxeyed_atsu	0:e8bfffbb3ab6	85	return value;
lynxeyed_atsu	0:e8bfffbb3ab6	86	}
lynxeyed_atsu	0:e8bfffbb3ab6	87
lynxeyed_atsu	0:e8bfffbb3ab6	88	int TextLCD::_getc() {
lynxeyed_atsu	0:e8bfffbb3ab6	89	return -1;
lynxeyed_atsu	0:e8bfffbb3ab6	90	}
lynxeyed_atsu	0:e8bfffbb3ab6	91
lynxeyed_atsu	0:e8bfffbb3ab6	92	void TextLCD::writeByte(int value) {
lynxeyed_atsu	0:e8bfffbb3ab6	93	_d = value >> 4;
lynxeyed_atsu	0:e8bfffbb3ab6	94	wait(0.000040f); // most instructions take 40us
lynxeyed_atsu	0:e8bfffbb3ab6	95	_e = 0;
lynxeyed_atsu	0:e8bfffbb3ab6	96	wait(0.000040f);
lynxeyed_atsu	0:e8bfffbb3ab6	97	_e = 1;
lynxeyed_atsu	0:e8bfffbb3ab6	98	_d = value >> 0;
lynxeyed_atsu	0:e8bfffbb3ab6	99	wait(0.000040f);
lynxeyed_atsu	0:e8bfffbb3ab6	100	_e = 0;
lynxeyed_atsu	0:e8bfffbb3ab6	101	wait(0.000040f); // most instructions take 40us
lynxeyed_atsu	0:e8bfffbb3ab6	102	_e = 1;
lynxeyed_atsu	0:e8bfffbb3ab6	103	}
lynxeyed_atsu	0:e8bfffbb3ab6	104
lynxeyed_atsu	0:e8bfffbb3ab6	105	void TextLCD::writeCommand(int command) {
lynxeyed_atsu	0:e8bfffbb3ab6	106	_rs = 0;
lynxeyed_atsu	0:e8bfffbb3ab6	107	writeByte(command);
lynxeyed_atsu	0:e8bfffbb3ab6	108	}
lynxeyed_atsu	0:e8bfffbb3ab6	109
lynxeyed_atsu	0:e8bfffbb3ab6	110	void TextLCD::writeData(int data) {
lynxeyed_atsu	0:e8bfffbb3ab6	111	_rs = 1;
lynxeyed_atsu	0:e8bfffbb3ab6	112	writeByte(data);
lynxeyed_atsu	0:e8bfffbb3ab6	113	}
lynxeyed_atsu	0:e8bfffbb3ab6	114
lynxeyed_atsu	0:e8bfffbb3ab6	115	int TextLCD::address(int column, int row) {
lynxeyed_atsu	0:e8bfffbb3ab6	116	switch (_type) {
lynxeyed_atsu	0:e8bfffbb3ab6	117	case LCD20x4:
lynxeyed_atsu	0:e8bfffbb3ab6	118	switch (row) {
lynxeyed_atsu	0:e8bfffbb3ab6	119	case 0:
lynxeyed_atsu	0:e8bfffbb3ab6	120	return 0x80 + column;
lynxeyed_atsu	0:e8bfffbb3ab6	121	case 1:
lynxeyed_atsu	0:e8bfffbb3ab6	122	return 0xc0 + column;
lynxeyed_atsu	0:e8bfffbb3ab6	123	case 2:
lynxeyed_atsu	0:e8bfffbb3ab6	124	return 0x94 + column;
lynxeyed_atsu	0:e8bfffbb3ab6	125	case 3:
lynxeyed_atsu	0:e8bfffbb3ab6	126	return 0xd4 + column;
lynxeyed_atsu	0:e8bfffbb3ab6	127	}
lynxeyed_atsu	0:e8bfffbb3ab6	128	case LCD16x2B:
lynxeyed_atsu	0:e8bfffbb3ab6	129	return 0x80 + (row * 40) + column;
lynxeyed_atsu	0:e8bfffbb3ab6	130	case LCD16x2:
lynxeyed_atsu	0:e8bfffbb3ab6	131	case LCD20x2:
lynxeyed_atsu	0:e8bfffbb3ab6	132	default:
lynxeyed_atsu	0:e8bfffbb3ab6	133	return 0x80 + (row * 0x40) + column;
lynxeyed_atsu	0:e8bfffbb3ab6	134	}
lynxeyed_atsu	0:e8bfffbb3ab6	135	}
lynxeyed_atsu	0:e8bfffbb3ab6	136
lynxeyed_atsu	0:e8bfffbb3ab6	137	int TextLCD::columns() {
lynxeyed_atsu	0:e8bfffbb3ab6	138	switch (_type) {
lynxeyed_atsu	0:e8bfffbb3ab6	139	case LCD20x4:
lynxeyed_atsu	0:e8bfffbb3ab6	140	case LCD20x2:
lynxeyed_atsu	0:e8bfffbb3ab6	141	return 20;
lynxeyed_atsu	0:e8bfffbb3ab6	142	case LCD16x2:
lynxeyed_atsu	0:e8bfffbb3ab6	143	case LCD16x2B:
lynxeyed_atsu	0:e8bfffbb3ab6	144	default:
lynxeyed_atsu	0:e8bfffbb3ab6	145	return 16;
lynxeyed_atsu	0:e8bfffbb3ab6	146	}
lynxeyed_atsu	0:e8bfffbb3ab6	147	}
lynxeyed_atsu	0:e8bfffbb3ab6	148
lynxeyed_atsu	0:e8bfffbb3ab6	149	int TextLCD::rows() {
lynxeyed_atsu	0:e8bfffbb3ab6	150	switch (_type) {
lynxeyed_atsu	0:e8bfffbb3ab6	151	case LCD20x4:
lynxeyed_atsu	0:e8bfffbb3ab6	152	return 4;
lynxeyed_atsu	0:e8bfffbb3ab6	153	case LCD16x2:
lynxeyed_atsu	0:e8bfffbb3ab6	154	case LCD16x2B:
lynxeyed_atsu	0:e8bfffbb3ab6	155	case LCD20x2:
lynxeyed_atsu	0:e8bfffbb3ab6	156	default:
lynxeyed_atsu	0:e8bfffbb3ab6	157	return 2;
lynxeyed_atsu	0:e8bfffbb3ab6	158	}
lynxeyed_atsu	0:e8bfffbb3ab6	159	}

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Type:	Program
Mbed OS support:	Mbed 2 deprecated
Created:	26 Feb 2011
Imports:	12
Forks:	0
Commits:	1
Dependents:	0
Dependencies:	1
Followers:	1

TextLCD/TextLCD.cpp@0:e8bfffbb3ab6, 2011-02-26 (annotated)

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