medica_demo_V10 - Medica demo control system.

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simon king / Mbed 2 deprecated medica_demo_V10

Medica demo control system.

TextLCD.cpp@0:00a9f58f32d0, 2010-10-28 (annotated)

Committer:: sjk127
Date:: Thu Oct 28 13:27:46 2010 +0000
Revision:: 0:00a9f58f32d0

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User	Revision	Line number	New contents of line
sjk127	0:00a9f58f32d0	1	/* mbed TextLCD Library
sjk127	0:00a9f58f32d0	2	* Copyright (c) 2007-2009 sford
sjk127	0:00a9f58f32d0	3	* Released under the MIT License: http://mbed.org/license/mit
sjk127	0:00a9f58f32d0	4	*
sjk127	0:00a9f58f32d0	5	* TODO: Needs serious rework/neatening up!
sjk127	0:00a9f58f32d0	6	*/
sjk127	0:00a9f58f32d0	7
sjk127	0:00a9f58f32d0	8	#include "TextLCD.h"
sjk127	0:00a9f58f32d0	9
sjk127	0:00a9f58f32d0	10	#include "mbed.h"
sjk127	0:00a9f58f32d0	11	#include "error.h"
sjk127	0:00a9f58f32d0	12
sjk127	0:00a9f58f32d0	13	using namespace mbed;
sjk127	0:00a9f58f32d0	14
sjk127	0:00a9f58f32d0	15
sjk127	0:00a9f58f32d0	16
sjk127	0:00a9f58f32d0	17	TextLCD::TextLCD(PinName rs, PinName rw, PinName e, PinName d0, PinName d1,
sjk127	0:00a9f58f32d0	18	PinName d2, PinName d3, int columns, int rows) : _rw(rw), _rs(rs),
sjk127	0:00a9f58f32d0	19	_e(e), _d(d0, d1, d2, d3), _columns(columns), _rows(rows) {
sjk127	0:00a9f58f32d0	20
sjk127	0:00a9f58f32d0	21	// _rows = 2;
sjk127	0:00a9f58f32d0	22	// _columns = 16;
sjk127	0:00a9f58f32d0	23	// Mon, 27 Apr 2009 23:32:34 +0200
sjk127	0:00a9f58f32d0	24	// Kevin Konradt:
sjk127	0:00a9f58f32d0	25	// When using a LCD with 1 row x 16 characters
sjk127	0:00a9f58f32d0	26	// instead of 2x16, try changing _columns to 8.
sjk127	0:00a9f58f32d0	27	// (display seems to split the 16 characters into
sjk127	0:00a9f58f32d0	28	// 2 virtual rows with 8 characters each.)
sjk127	0:00a9f58f32d0	29
sjk127	0:00a9f58f32d0	30	_rw = 0;
sjk127	0:00a9f58f32d0	31	_e = 1;
sjk127	0:00a9f58f32d0	32	_rs = 0; // command mode
sjk127	0:00a9f58f32d0	33
sjk127	0:00a9f58f32d0	34	// Should theoretically wait 15ms, but most things will be powered up pre-reset
sjk127	0:00a9f58f32d0	35	// so i'll disable that for the minute. If implemented, could wait 15ms post reset
sjk127	0:00a9f58f32d0	36	// instead
sjk127	0:00a9f58f32d0	37	// wait(0.015);
sjk127	0:00a9f58f32d0	38
sjk127	0:00a9f58f32d0	39	// send "Display Settings" 3 times (Only top nibble of 0x30 as we've got 4-bit bus)
sjk127	0:00a9f58f32d0	40	for(int i=0; i<3; i++) {
sjk127	0:00a9f58f32d0	41	writeNibble(0x3);
sjk127	0:00a9f58f32d0	42	wait(0.00164); // this command takes 1.64ms, so wait for it
sjk127	0:00a9f58f32d0	43	}
sjk127	0:00a9f58f32d0	44	writeNibble(0x2); // 4-bit mode
sjk127	0:00a9f58f32d0	45
sjk127	0:00a9f58f32d0	46	writeCommand(0x28); // Function set 001 BW N F - -
sjk127	0:00a9f58f32d0	47	writeCommand(0x0C);
sjk127	0:00a9f58f32d0	48	writeCommand(0x6); // Cursor Direction and Display Shift : 0000 01 CD S (CD 0-left, 1-right S(hift) 0-no, 1-yes
sjk127	0:00a9f58f32d0	49
sjk127	0:00a9f58f32d0	50	cls();
sjk127	0:00a9f58f32d0	51	}
sjk127	0:00a9f58f32d0	52
sjk127	0:00a9f58f32d0	53	int TextLCD::_putc(int value) {
sjk127	0:00a9f58f32d0	54	if(value == '\n') {
sjk127	0:00a9f58f32d0	55	newline();
sjk127	0:00a9f58f32d0	56	} else {
sjk127	0:00a9f58f32d0	57	writeData(value);
sjk127	0:00a9f58f32d0	58	}
sjk127	0:00a9f58f32d0	59	return value;
sjk127	0:00a9f58f32d0	60	}
sjk127	0:00a9f58f32d0	61
sjk127	0:00a9f58f32d0	62	int TextLCD::_getc() {
sjk127	0:00a9f58f32d0	63	return 0;
sjk127	0:00a9f58f32d0	64	}
sjk127	0:00a9f58f32d0	65
sjk127	0:00a9f58f32d0	66	void TextLCD::newline() {
sjk127	0:00a9f58f32d0	67	_column = 0;
sjk127	0:00a9f58f32d0	68	_row++;
sjk127	0:00a9f58f32d0	69	if(_row >= _rows) {
sjk127	0:00a9f58f32d0	70	_row = 0;
sjk127	0:00a9f58f32d0	71	}
sjk127	0:00a9f58f32d0	72	locate(_column, _row);
sjk127	0:00a9f58f32d0	73	}
sjk127	0:00a9f58f32d0	74
sjk127	0:00a9f58f32d0	75	void TextLCD::locate(int column, int row) {
sjk127	0:00a9f58f32d0	76	if(column < 0 \|\| column >= _columns \|\| row < 0 \|\| row >= _rows) {
sjk127	0:00a9f58f32d0	77	error("locate(%d,%d) out of range on %dx%d display", column, row, _columns, _rows);
sjk127	0:00a9f58f32d0	78	return;
sjk127	0:00a9f58f32d0	79	}
sjk127	0:00a9f58f32d0	80
sjk127	0:00a9f58f32d0	81	_row = row;
sjk127	0:00a9f58f32d0	82	_column = column;
sjk127	0:00a9f58f32d0	83	int address=0;
sjk127	0:00a9f58f32d0	84
sjk127	0:00a9f58f32d0	85	if (_rows > 2) {
sjk127	0:00a9f58f32d0	86	// row 0 : 0x0->0x13
sjk127	0:00a9f58f32d0	87	// row 1 : 0x40->0x53
sjk127	0:00a9f58f32d0	88	// row 2 : 0x14->0x27
sjk127	0:00a9f58f32d0	89	// row 3 : 0x54->0x67
sjk127	0:00a9f58f32d0	90
sjk127	0:00a9f58f32d0	91	switch (_row) {
sjk127	0:00a9f58f32d0	92	case (0) : address = 0x80 + _column;
sjk127	0:00a9f58f32d0	93	break;
sjk127	0:00a9f58f32d0	94	case (1) : address = 0xc0 + _column;
sjk127	0:00a9f58f32d0	95	break;
sjk127	0:00a9f58f32d0	96	case (2) : address = 0x94 + _column;
sjk127	0:00a9f58f32d0	97	break;
sjk127	0:00a9f58f32d0	98	case (3) : address = 0xd4 + _column;
sjk127	0:00a9f58f32d0	99	break;
sjk127	0:00a9f58f32d0	100	}
sjk127	0:00a9f58f32d0	101
sjk127	0:00a9f58f32d0	102	}
sjk127	0:00a9f58f32d0	103	else {
sjk127	0:00a9f58f32d0	104	// memory starts at 0x80, and is 40 chars long per row
sjk127	0:00a9f58f32d0	105	address = 0x80 + (_row * 40) + _column;
sjk127	0:00a9f58f32d0	106	}
sjk127	0:00a9f58f32d0	107
sjk127	0:00a9f58f32d0	108	writeCommand(address);
sjk127	0:00a9f58f32d0	109	}
sjk127	0:00a9f58f32d0	110
sjk127	0:00a9f58f32d0	111	void TextLCD::cls() {
sjk127	0:00a9f58f32d0	112	writeCommand(0x01); // Clear Display
sjk127	0:00a9f58f32d0	113	wait(0.005); // This command takes 1.64 ms
sjk127	0:00a9f58f32d0	114	locate(0, 0);
sjk127	0:00a9f58f32d0	115	}
sjk127	0:00a9f58f32d0	116
sjk127	0:00a9f58f32d0	117	void TextLCD::reset() {
sjk127	0:00a9f58f32d0	118	cls();
sjk127	0:00a9f58f32d0	119	}
sjk127	0:00a9f58f32d0	120
sjk127	0:00a9f58f32d0	121	void TextLCD::clock() {
sjk127	0:00a9f58f32d0	122	wait(0.005);
sjk127	0:00a9f58f32d0	123	_e = 0;
sjk127	0:00a9f58f32d0	124	wait(0.005); // most instructions take 40us
sjk127	0:00a9f58f32d0	125	_e = 1;
sjk127	0:00a9f58f32d0	126	}
sjk127	0:00a9f58f32d0	127
sjk127	0:00a9f58f32d0	128	void TextLCD::writeNibble(int value) {
sjk127	0:00a9f58f32d0	129	_d = value;
sjk127	0:00a9f58f32d0	130	clock();
sjk127	0:00a9f58f32d0	131	}
sjk127	0:00a9f58f32d0	132
sjk127	0:00a9f58f32d0	133	void TextLCD::writeByte(int value) {
sjk127	0:00a9f58f32d0	134	writeNibble(value >> 4);
sjk127	0:00a9f58f32d0	135	writeNibble(value >> 0);
sjk127	0:00a9f58f32d0	136	}
sjk127	0:00a9f58f32d0	137
sjk127	0:00a9f58f32d0	138	void TextLCD::writeCommand(int command) {
sjk127	0:00a9f58f32d0	139	_rs = 0;
sjk127	0:00a9f58f32d0	140	writeByte(command);
sjk127	0:00a9f58f32d0	141	}
sjk127	0:00a9f58f32d0	142
sjk127	0:00a9f58f32d0	143	void TextLCD::writeData(int data) {
sjk127	0:00a9f58f32d0	144	_rs = 1;
sjk127	0:00a9f58f32d0	145	writeByte(data);
sjk127	0:00a9f58f32d0	146	_column++;
sjk127	0:00a9f58f32d0	147	if(_column >= _columns) {
sjk127	0:00a9f58f32d0	148	newline();
sjk127	0:00a9f58f32d0	149	}
sjk127	0:00a9f58f32d0	150	}

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Type:	Program
Mbed OS support:	Mbed 2 deprecated
Created:	28 Oct 2010
Imports:	2
Forks:	0
Commits:	1
Dependents:	0
Dependencies:	1
Followers:	1

TextLCD.cpp@0:00a9f58f32d0, 2010-10-28 (annotated)

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