ER400TRS_Temperature_Receiver - Wireless temperature receiver with ER400TRS trans…

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Lluis Nadal / Mbed 2 deprecated ER400TRS_Temperature_Receiver

Wireless temperature receiver with ER400TRS transceiver.

TextLCD/TextLCD.cpp@0:996e5de63519, 2011-08-31 (annotated)

Committer:: lnadal
Date:: Wed Aug 31 04:09:10 2011 +0000
Revision:: 0:996e5de63519

Who changed what in which revision?

User	Revision	Line number	New contents of line
lnadal	0:996e5de63519	1	/* mbed TextLCD Library, for a 4-bit LCD based on HD44780
lnadal	0:996e5de63519	2	* Copyright (c) 2007-2010, sford
lnadal	0:996e5de63519	3	*
lnadal	0:996e5de63519	4	* Permission is hereby granted, free of charge, to any person obtaining a copy
lnadal	0:996e5de63519	5	* of this software and associated documentation files (the "Software"), to deal
lnadal	0:996e5de63519	6	* in the Software without restriction, including without limitation the rights
lnadal	0:996e5de63519	7	* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
lnadal	0:996e5de63519	8	* copies of the Software, and to permit persons to whom the Software is
lnadal	0:996e5de63519	9	* furnished to do so, subject to the following conditions:
lnadal	0:996e5de63519	10	*
lnadal	0:996e5de63519	11	* The above copyright notice and this permission notice shall be included in
lnadal	0:996e5de63519	12	* all copies or substantial portions of the Software.
lnadal	0:996e5de63519	13	*
lnadal	0:996e5de63519	14	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
lnadal	0:996e5de63519	15	* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
lnadal	0:996e5de63519	16	* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
lnadal	0:996e5de63519	17	* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
lnadal	0:996e5de63519	18	* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
lnadal	0:996e5de63519	19	* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
lnadal	0:996e5de63519	20	* THE SOFTWARE.
lnadal	0:996e5de63519	21	*/
lnadal	0:996e5de63519	22
lnadal	0:996e5de63519	23	#include "TextLCD.h"
lnadal	0:996e5de63519	24	#include "mbed.h"
lnadal	0:996e5de63519	25
lnadal	0:996e5de63519	26	TextLCD::TextLCD(PinName rs, PinName e, PinName d0, PinName d1,
lnadal	0:996e5de63519	27	PinName d2, PinName d3, LCDType type) : _rs(rs),
lnadal	0:996e5de63519	28	_e(e), _d(d0, d1, d2, d3),
lnadal	0:996e5de63519	29	_type(type) {
lnadal	0:996e5de63519	30
lnadal	0:996e5de63519	31	_e = 1;
lnadal	0:996e5de63519	32	_rs = 0; // command mode
lnadal	0:996e5de63519	33
lnadal	0:996e5de63519	34	wait(0.015); // Wait 15ms to ensure powered up
lnadal	0:996e5de63519	35
lnadal	0:996e5de63519	36	// send "Display Settings" 3 times (Only top nibble of 0x30 as we've got 4-bit bus)
lnadal	0:996e5de63519	37	for (int i=0; i<3; i++) {
lnadal	0:996e5de63519	38	writeByte(0x3);
lnadal	0:996e5de63519	39	wait(0.00164); // this command takes 1.64ms, so wait for it
lnadal	0:996e5de63519	40	}
lnadal	0:996e5de63519	41	writeByte(0x2); // 4-bit mode
lnadal	0:996e5de63519	42	wait(0.000040f); // most instructions take 40us
lnadal	0:996e5de63519	43
lnadal	0:996e5de63519	44	writeCommand(0x28); // Function set 001 BW N F - -
lnadal	0:996e5de63519	45	writeCommand(0x0C);
lnadal	0:996e5de63519	46	writeCommand(0x6); // Cursor Direction and Display Shift : 0000 01 CD S (CD 0-left, 1-right S(hift) 0-no, 1-yes
lnadal	0:996e5de63519	47	cls();
lnadal	0:996e5de63519	48	}
lnadal	0:996e5de63519	49
lnadal	0:996e5de63519	50	void TextLCD::character(int column, int row, int c) {
lnadal	0:996e5de63519	51	int a = address(column, row);
lnadal	0:996e5de63519	52	writeCommand(a);
lnadal	0:996e5de63519	53	writeData(c);
lnadal	0:996e5de63519	54	}
lnadal	0:996e5de63519	55
lnadal	0:996e5de63519	56	void TextLCD::cls() {
lnadal	0:996e5de63519	57	writeCommand(0x01); // cls, and set cursor to 0
lnadal	0:996e5de63519	58	wait(0.00164f); // This command takes 1.64 ms
lnadal	0:996e5de63519	59	locate(0, 0);
lnadal	0:996e5de63519	60	}
lnadal	0:996e5de63519	61
lnadal	0:996e5de63519	62	void TextLCD::locate(int column, int row) {
lnadal	0:996e5de63519	63	_column = column;
lnadal	0:996e5de63519	64	_row = row;
lnadal	0:996e5de63519	65	}
lnadal	0:996e5de63519	66
lnadal	0:996e5de63519	67	int TextLCD::_putc(int value) {
lnadal	0:996e5de63519	68	if (value == '\n') {
lnadal	0:996e5de63519	69	_column = 0;
lnadal	0:996e5de63519	70	_row++;
lnadal	0:996e5de63519	71	if (_row >= rows()) {
lnadal	0:996e5de63519	72	_row = 0;
lnadal	0:996e5de63519	73	}
lnadal	0:996e5de63519	74	} else {
lnadal	0:996e5de63519	75	character(_column, _row, value);
lnadal	0:996e5de63519	76	_column++;
lnadal	0:996e5de63519	77	if (_column >= columns()) {
lnadal	0:996e5de63519	78	_column = 0;
lnadal	0:996e5de63519	79	_row++;
lnadal	0:996e5de63519	80	if (_row >= rows()) {
lnadal	0:996e5de63519	81	_row = 0;
lnadal	0:996e5de63519	82	}
lnadal	0:996e5de63519	83	}
lnadal	0:996e5de63519	84	}
lnadal	0:996e5de63519	85	return value;
lnadal	0:996e5de63519	86	}
lnadal	0:996e5de63519	87
lnadal	0:996e5de63519	88	int TextLCD::_getc() {
lnadal	0:996e5de63519	89	return -1;
lnadal	0:996e5de63519	90	}
lnadal	0:996e5de63519	91
lnadal	0:996e5de63519	92	void TextLCD::writeByte(int value) {
lnadal	0:996e5de63519	93	_d = value >> 4;
lnadal	0:996e5de63519	94	wait(0.000040f); // most instructions take 40us
lnadal	0:996e5de63519	95	_e = 0;
lnadal	0:996e5de63519	96	wait(0.000040f);
lnadal	0:996e5de63519	97	_e = 1;
lnadal	0:996e5de63519	98	_d = value >> 0;
lnadal	0:996e5de63519	99	wait(0.000040f);
lnadal	0:996e5de63519	100	_e = 0;
lnadal	0:996e5de63519	101	wait(0.000040f); // most instructions take 40us
lnadal	0:996e5de63519	102	_e = 1;
lnadal	0:996e5de63519	103	}
lnadal	0:996e5de63519	104
lnadal	0:996e5de63519	105	void TextLCD::writeCommand(int command) {
lnadal	0:996e5de63519	106	_rs = 0;
lnadal	0:996e5de63519	107	writeByte(command);
lnadal	0:996e5de63519	108	}
lnadal	0:996e5de63519	109
lnadal	0:996e5de63519	110	void TextLCD::writeData(int data) {
lnadal	0:996e5de63519	111	_rs = 1;
lnadal	0:996e5de63519	112	writeByte(data);
lnadal	0:996e5de63519	113	}
lnadal	0:996e5de63519	114
lnadal	0:996e5de63519	115	int TextLCD::address(int column, int row) {
lnadal	0:996e5de63519	116	switch (_type) {
lnadal	0:996e5de63519	117	case LCD20x4:
lnadal	0:996e5de63519	118	switch (row) {
lnadal	0:996e5de63519	119	case 0:
lnadal	0:996e5de63519	120	return 0x80 + column;
lnadal	0:996e5de63519	121	case 1:
lnadal	0:996e5de63519	122	return 0xc0 + column;
lnadal	0:996e5de63519	123	case 2:
lnadal	0:996e5de63519	124	return 0x94 + column;
lnadal	0:996e5de63519	125	case 3:
lnadal	0:996e5de63519	126	return 0xd4 + column;
lnadal	0:996e5de63519	127	}
lnadal	0:996e5de63519	128	case LCD16x2B:
lnadal	0:996e5de63519	129	return 0x80 + (row * 40) + column;
lnadal	0:996e5de63519	130	case LCD16x2:
lnadal	0:996e5de63519	131	case LCD20x2:
lnadal	0:996e5de63519	132	default:
lnadal	0:996e5de63519	133	return 0x80 + (row * 0x40) + column;
lnadal	0:996e5de63519	134	}
lnadal	0:996e5de63519	135	}
lnadal	0:996e5de63519	136
lnadal	0:996e5de63519	137	int TextLCD::columns() {
lnadal	0:996e5de63519	138	switch (_type) {
lnadal	0:996e5de63519	139	case LCD20x4:
lnadal	0:996e5de63519	140	case LCD20x2:
lnadal	0:996e5de63519	141	return 20;
lnadal	0:996e5de63519	142	case LCD16x2:
lnadal	0:996e5de63519	143	case LCD16x2B:
lnadal	0:996e5de63519	144	default:
lnadal	0:996e5de63519	145	return 16;
lnadal	0:996e5de63519	146	}
lnadal	0:996e5de63519	147	}
lnadal	0:996e5de63519	148
lnadal	0:996e5de63519	149	int TextLCD::rows() {
lnadal	0:996e5de63519	150	switch (_type) {
lnadal	0:996e5de63519	151	case LCD20x4:
lnadal	0:996e5de63519	152	return 4;
lnadal	0:996e5de63519	153	case LCD16x2:
lnadal	0:996e5de63519	154	case LCD16x2B:
lnadal	0:996e5de63519	155	case LCD20x2:
lnadal	0:996e5de63519	156	default:
lnadal	0:996e5de63519	157	return 2;
lnadal	0:996e5de63519	158	}
lnadal	0:996e5de63519	159	}

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Type:	Program
Mbed OS support:	Mbed 2 deprecated
Created:	31 Aug 2011
Imports:	3
Forks:	0
Commits:	1
Dependents:	0
Dependencies:	1
Followers:	1

TextLCD/TextLCD.cpp@0:996e5de63519, 2011-08-31 (annotated)

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