I2cLCD_cursor - I2cLCD library that can display cursor.

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Satoshi Togawa / I2cLCD_cursor

I2cLCD library that can display cursor.

Dependents: LcdClock

Fork of I2cLCD by Junichi Katsu

I2cLCD.cpp@0:b3cc6ae3dfd8, 2010-06-28 (annotated)

Committer:: jksoft
Date:: Mon Jun 28 14:20:58 2010 +0000
Revision:: 0:b3cc6ae3dfd8
Child:: 1:f973d1359998

Who changed what in which revision?

User	Revision	Line number	New contents of line
jksoft	0:b3cc6ae3dfd8	1	#include "I2cLCD.h"
jksoft	0:b3cc6ae3dfd8	2	#include "mbed.h"
jksoft	0:b3cc6ae3dfd8	3
jksoft	0:b3cc6ae3dfd8	4	#define I2CLCD_ADDR 0x7C
jksoft	0:b3cc6ae3dfd8	5
jksoft	0:b3cc6ae3dfd8	6	#define RS_CMD 0x00
jksoft	0:b3cc6ae3dfd8	7	#define RS_DATA 0x40
jksoft	0:b3cc6ae3dfd8	8
jksoft	0:b3cc6ae3dfd8	9	#define FUNC_SET1 0x38
jksoft	0:b3cc6ae3dfd8	10	#define FUNC_SET2 0x39
jksoft	0:b3cc6ae3dfd8	11	#define INT_OSC 0x14
jksoft	0:b3cc6ae3dfd8	12
jksoft	0:b3cc6ae3dfd8	13	#define CNTR_DEF 0x20
jksoft	0:b3cc6ae3dfd8	14
jksoft	0:b3cc6ae3dfd8	15	unsigned char icon_data[]=
jksoft	0:b3cc6ae3dfd8	16	{
jksoft	0:b3cc6ae3dfd8	17	0x00, 0x10,
jksoft	0:b3cc6ae3dfd8	18	0x02, 0x10,
jksoft	0:b3cc6ae3dfd8	19	0x04, 0x10,
jksoft	0:b3cc6ae3dfd8	20	0x06, 0x10,
jksoft	0:b3cc6ae3dfd8	21
jksoft	0:b3cc6ae3dfd8	22	0x07, 0x10,
jksoft	0:b3cc6ae3dfd8	23	0x07, 0x08,
jksoft	0:b3cc6ae3dfd8	24	0x09, 0x10,
jksoft	0:b3cc6ae3dfd8	25	0x0B, 0x10,
jksoft	0:b3cc6ae3dfd8	26
jksoft	0:b3cc6ae3dfd8	27	0x0D, 0x08,
jksoft	0:b3cc6ae3dfd8	28	0x0D, 0x04,
jksoft	0:b3cc6ae3dfd8	29	0x0D, 0x02,
jksoft	0:b3cc6ae3dfd8	30	0x0D, 0x10,
jksoft	0:b3cc6ae3dfd8	31
jksoft	0:b3cc6ae3dfd8	32	0x0F, 0x10,
jksoft	0:b3cc6ae3dfd8	33	};
jksoft	0:b3cc6ae3dfd8	34
jksoft	0:b3cc6ae3dfd8	35	I2cLCD::I2cLCD(PinName sda, PinName scl, PinName rp) : _rs( rp ) , _i2c( sda , scl ){
jksoft	0:b3cc6ae3dfd8	36
jksoft	0:b3cc6ae3dfd8	37	contrast = CNTR_DEF;
jksoft	0:b3cc6ae3dfd8	38	icon = 0;
jksoft	0:b3cc6ae3dfd8	39
jksoft	0:b3cc6ae3dfd8	40	wait(0.015);
jksoft	0:b3cc6ae3dfd8	41	// reset LOW->HIGH
jksoft	0:b3cc6ae3dfd8	42	_rs = 0;
jksoft	0:b3cc6ae3dfd8	43	wait(0.01);
jksoft	0:b3cc6ae3dfd8	44	_rs = 1;
jksoft	0:b3cc6ae3dfd8	45	wait(0.05);
jksoft	0:b3cc6ae3dfd8	46
jksoft	0:b3cc6ae3dfd8	47	writeCommand(FUNC_SET1);
jksoft	0:b3cc6ae3dfd8	48	writeCommand(FUNC_SET2);
jksoft	0:b3cc6ae3dfd8	49	writeCommand(INT_OSC);
jksoft	0:b3cc6ae3dfd8	50
jksoft	0:b3cc6ae3dfd8	51	writeCommand(0x70 \| (contrast & 0xF));
jksoft	0:b3cc6ae3dfd8	52	writeCommand(0x5C \| ((contrast >> 4) & 0x3));
jksoft	0:b3cc6ae3dfd8	53
jksoft	0:b3cc6ae3dfd8	54	writeCommand(0x6C);
jksoft	0:b3cc6ae3dfd8	55	wait(0.3);
jksoft	0:b3cc6ae3dfd8	56
jksoft	0:b3cc6ae3dfd8	57	writeCommand(0x38); // function set
jksoft	0:b3cc6ae3dfd8	58	writeCommand(0x0C); // Display On
jksoft	0:b3cc6ae3dfd8	59
jksoft	0:b3cc6ae3dfd8	60	cls(); // Clear Display
jksoft	0:b3cc6ae3dfd8	61
jksoft	0:b3cc6ae3dfd8	62	}
jksoft	0:b3cc6ae3dfd8	63
jksoft	0:b3cc6ae3dfd8	64
jksoft	0:b3cc6ae3dfd8	65
jksoft	0:b3cc6ae3dfd8	66	void I2cLCD::character(int column, int row, int c) {
jksoft	0:b3cc6ae3dfd8	67	int a = address(column, row);
jksoft	0:b3cc6ae3dfd8	68	writeCommand(a);
jksoft	0:b3cc6ae3dfd8	69	writeData(c);
jksoft	0:b3cc6ae3dfd8	70	}
jksoft	0:b3cc6ae3dfd8	71
jksoft	0:b3cc6ae3dfd8	72	void I2cLCD::cls() {
jksoft	0:b3cc6ae3dfd8	73	writeCommand(0x01); // cls, and set cursor to 0
jksoft	0:b3cc6ae3dfd8	74	wait(0.00164f); // This command takes 1.64 ms
jksoft	0:b3cc6ae3dfd8	75	locate(0, 0);
jksoft	0:b3cc6ae3dfd8	76	}
jksoft	0:b3cc6ae3dfd8	77
jksoft	0:b3cc6ae3dfd8	78	void I2cLCD::locate(int column, int row) {
jksoft	0:b3cc6ae3dfd8	79	_column = column;
jksoft	0:b3cc6ae3dfd8	80	_row = row;
jksoft	0:b3cc6ae3dfd8	81	}
jksoft	0:b3cc6ae3dfd8	82
jksoft	0:b3cc6ae3dfd8	83	int I2cLCD::_putc(int value) {
jksoft	0:b3cc6ae3dfd8	84	if (value == '\n') {
jksoft	0:b3cc6ae3dfd8	85	_column = 0;
jksoft	0:b3cc6ae3dfd8	86	_row++;
jksoft	0:b3cc6ae3dfd8	87	if (_row >= rows()) {
jksoft	0:b3cc6ae3dfd8	88	_row = 0;
jksoft	0:b3cc6ae3dfd8	89	}
jksoft	0:b3cc6ae3dfd8	90	} else {
jksoft	0:b3cc6ae3dfd8	91	character(_column, _row, value);
jksoft	0:b3cc6ae3dfd8	92	_column++;
jksoft	0:b3cc6ae3dfd8	93	if (_column >= columns()) {
jksoft	0:b3cc6ae3dfd8	94	_column = 0;
jksoft	0:b3cc6ae3dfd8	95	_row++;
jksoft	0:b3cc6ae3dfd8	96	if (_row >= rows()) {
jksoft	0:b3cc6ae3dfd8	97	_row = 0;
jksoft	0:b3cc6ae3dfd8	98	}
jksoft	0:b3cc6ae3dfd8	99	}
jksoft	0:b3cc6ae3dfd8	100	}
jksoft	0:b3cc6ae3dfd8	101	return value;
jksoft	0:b3cc6ae3dfd8	102	}
jksoft	0:b3cc6ae3dfd8	103
jksoft	0:b3cc6ae3dfd8	104	int I2cLCD::_getc() {
jksoft	0:b3cc6ae3dfd8	105	return -1;
jksoft	0:b3cc6ae3dfd8	106	}
jksoft	0:b3cc6ae3dfd8	107
jksoft	0:b3cc6ae3dfd8	108	void I2cLCD::writeCommand( int cmd )
jksoft	0:b3cc6ae3dfd8	109	{
jksoft	0:b3cc6ae3dfd8	110	char cmds[2];
jksoft	0:b3cc6ae3dfd8	111
jksoft	0:b3cc6ae3dfd8	112	cmds[0] = RS_CMD;
jksoft	0:b3cc6ae3dfd8	113	cmds[1] = cmd;
jksoft	0:b3cc6ae3dfd8	114
jksoft	0:b3cc6ae3dfd8	115	_i2c.write(I2CLCD_ADDR, cmds, 2);
jksoft	0:b3cc6ae3dfd8	116	}
jksoft	0:b3cc6ae3dfd8	117
jksoft	0:b3cc6ae3dfd8	118	void I2cLCD::writeData( int data )
jksoft	0:b3cc6ae3dfd8	119	{
jksoft	0:b3cc6ae3dfd8	120	char cmd[2];
jksoft	0:b3cc6ae3dfd8	121
jksoft	0:b3cc6ae3dfd8	122	cmd[0] = RS_DATA;
jksoft	0:b3cc6ae3dfd8	123	cmd[1] = data;
jksoft	0:b3cc6ae3dfd8	124
jksoft	0:b3cc6ae3dfd8	125	_i2c.write(I2CLCD_ADDR, cmd, 2);
jksoft	0:b3cc6ae3dfd8	126	}
jksoft	0:b3cc6ae3dfd8	127
jksoft	0:b3cc6ae3dfd8	128	int I2cLCD::address(int column, int row) {
jksoft	0:b3cc6ae3dfd8	129
jksoft	0:b3cc6ae3dfd8	130	return 0x80 + (row * 0x40) + column;
jksoft	0:b3cc6ae3dfd8	131	}
jksoft	0:b3cc6ae3dfd8	132
jksoft	0:b3cc6ae3dfd8	133	int I2cLCD::columns() {
jksoft	0:b3cc6ae3dfd8	134	return 16;
jksoft	0:b3cc6ae3dfd8	135	}
jksoft	0:b3cc6ae3dfd8	136
jksoft	0:b3cc6ae3dfd8	137	int I2cLCD::rows() {
jksoft	0:b3cc6ae3dfd8	138	return 2;
jksoft	0:b3cc6ae3dfd8	139	}
jksoft	0:b3cc6ae3dfd8	140
jksoft	0:b3cc6ae3dfd8	141	void I2cLCD::seticon(IconType type)
jksoft	0:b3cc6ae3dfd8	142	{
jksoft	0:b3cc6ae3dfd8	143	icon \|= type;
jksoft	0:b3cc6ae3dfd8	144	puticon( icon );
jksoft	0:b3cc6ae3dfd8	145	}
jksoft	0:b3cc6ae3dfd8	146
jksoft	0:b3cc6ae3dfd8	147	void I2cLCD::clearicon(IconType type)
jksoft	0:b3cc6ae3dfd8	148	{
jksoft	0:b3cc6ae3dfd8	149	icon &= ~type;
jksoft	0:b3cc6ae3dfd8	150	puticon( icon );
jksoft	0:b3cc6ae3dfd8	151	}
jksoft	0:b3cc6ae3dfd8	152
jksoft	0:b3cc6ae3dfd8	153
jksoft	0:b3cc6ae3dfd8	154	void I2cLCD::puticon(int flg)
jksoft	0:b3cc6ae3dfd8	155	{
jksoft	0:b3cc6ae3dfd8	156	static unsigned char icon_buff[16];
jksoft	0:b3cc6ae3dfd8	157	unsigned char i;
jksoft	0:b3cc6ae3dfd8	158
jksoft	0:b3cc6ae3dfd8	159	for(i=0;i<sizeof(icon_data)/2;i++)
jksoft	0:b3cc6ae3dfd8	160	{
jksoft	0:b3cc6ae3dfd8	161	if(flg & (0x1000>>i))
jksoft	0:b3cc6ae3dfd8	162	{
jksoft	0:b3cc6ae3dfd8	163	icon_buff[icon_data[i2]] \|= icon_data[i2+1];
jksoft	0:b3cc6ae3dfd8	164	}
jksoft	0:b3cc6ae3dfd8	165	else
jksoft	0:b3cc6ae3dfd8	166	{
jksoft	0:b3cc6ae3dfd8	167	icon_buff[icon_data[i2]] &= ~icon_data[i2+1];
jksoft	0:b3cc6ae3dfd8	168	}
jksoft	0:b3cc6ae3dfd8	169	}
jksoft	0:b3cc6ae3dfd8	170
jksoft	0:b3cc6ae3dfd8	171	for(i=0;i<16;i++){
jksoft	0:b3cc6ae3dfd8	172	writeCommand(0x39);
jksoft	0:b3cc6ae3dfd8	173	writeCommand(0x40+i);
jksoft	0:b3cc6ae3dfd8	174	writeData(icon_buff[i]);
jksoft	0:b3cc6ae3dfd8	175	}
jksoft	0:b3cc6ae3dfd8	176	}

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Type:	Library
Created:	23 Feb 2014
Imports:	1
Forks:	0
Commits:	3
Dependents:	1
Dependencies:	0
Followers:	1

The code in this repository is Apache licensed.

I2cLCD.cpp@0:b3cc6ae3dfd8, 2010-06-28 (annotated)

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