trackballer - Control library for the Sparkfun Entertainment Tr…

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Control library for the Sparkfun Entertainment Trackballer breakout board.

trackballer.cpp@12:78d329b4745b, 2011-02-20 (annotated)

Committer:: Nakor
Date:: Sun Feb 20 17:26:55 2011 +0000
Revision:: 12:78d329b4745b
Parent:: 11:35347e6474f9
Child:: 13:b37eb30297a3

Who changed what in which revision?

User	Revision	Line number	New contents of line
Nakor	0:2743c73d648d	1	#include "mbed.h"
Nakor	0:2743c73d648d	2	#include "trackballer.h"
Nakor	0:2743c73d648d	3
Nakor	0:2743c73d648d	4
Nakor	0:2743c73d648d	5
Nakor	0:2743c73d648d	6
Nakor	6:c0ebd0f8f873	7	trackballer::trackballer(PinName button, PinName right, PinName down, PinName left, PinName up, PinName red, PinName green, PinName blue, PinName white, char limits)
Nakor	0:2743c73d648d	8	{
Nakor	0:2743c73d648d	9
Nakor	6:c0ebd0f8f873	10	_limits = limits;
Nakor	6:c0ebd0f8f873	11
Nakor	0:2743c73d648d	12	_buttonPin = new DigitalIn(button);
Nakor	0:2743c73d648d	13	_rightPin = new DigitalIn(right);
Nakor	0:2743c73d648d	14	_downPin = new DigitalIn(down);
Nakor	0:2743c73d648d	15	_leftPin = new DigitalIn(left);
Nakor	0:2743c73d648d	16	_upPin = new DigitalIn(up);
Nakor	0:2743c73d648d	17
Nakor	0:2743c73d648d	18	_redLED = new PwmOut(red);
Nakor	0:2743c73d648d	19	_greenLED = new PwmOut(green);
Nakor	0:2743c73d648d	20	_blueLED = new PwmOut(blue);
Nakor	0:2743c73d648d	21	_whiteLED = new PwmOut(white);
Nakor	0:2743c73d648d	22
Nakor	0:2743c73d648d	23
Nakor	0:2743c73d648d	24
Nakor	0:2743c73d648d	25	_buttonPushCounter = 0; // counter for the number of button presses
Nakor	0:2743c73d648d	26
Nakor	11:35347e6474f9	27	_buttonState = 1; // current state of the button
Nakor	11:35347e6474f9	28	_lastButtonState = 1; // previous state of the button
Nakor	0:2743c73d648d	29
Nakor	0:2743c73d648d	30	_upState = 0;
Nakor	0:2743c73d648d	31	_downState = 0;
Nakor	0:2743c73d648d	32	_leftState = 0;
Nakor	0:2743c73d648d	33	_rightState = 0;
Nakor	0:2743c73d648d	34	_lastUpState = 0;
Nakor	0:2743c73d648d	35	_lastDownState = 0;
Nakor	0:2743c73d648d	36	_lastLeftState = 0;
Nakor	0:2743c73d648d	37	_lastRightState = 0;
Nakor	0:2743c73d648d	38
Nakor	7:229fc175e05e	39	_xPosition = 0.5;
Nakor	7:229fc175e05e	40	_yPosition = 0.5;
Nakor	0:2743c73d648d	41
Nakor	0:2743c73d648d	42
Nakor	0:2743c73d648d	43	_buttonPin->mode(PullUp);
Nakor	0:2743c73d648d	44
Nakor	0:2743c73d648d	45	_redLED->write(0.0);
Nakor	0:2743c73d648d	46	_greenLED->write(0.0);
Nakor	0:2743c73d648d	47	_blueLED->write(0.0);
Nakor	0:2743c73d648d	48	_whiteLED->write(0.0);
Nakor	0:2743c73d648d	49
Nakor	0:2743c73d648d	50	_direction = 0x00;
Nakor	0:2743c73d648d	51
Nakor	0:2743c73d648d	52	_outputTimer.start();
Nakor	0:2743c73d648d	53
Nakor	0:2743c73d648d	54	}
Nakor	0:2743c73d648d	55
Nakor	0:2743c73d648d	56
Nakor	0:2743c73d648d	57
Nakor	0:2743c73d648d	58	/******************/
Nakor	0:2743c73d648d	59	/* Public */
Nakor	0:2743c73d648d	60	/******************/
Nakor	0:2743c73d648d	61
Nakor	0:2743c73d648d	62
Nakor	5:0abcaea1fb07	63	void trackballer::getState(float &xPosition, float &yPosition, char &button)
Nakor	0:2743c73d648d	64	{
Nakor	0:2743c73d648d	65
Nakor	0:2743c73d648d	66	_buttonState = _buttonPin->read();
Nakor	0:2743c73d648d	67
Nakor	0:2743c73d648d	68	// compare the _buttonState to its previous state
Nakor	0:2743c73d648d	69	if (_buttonState != _lastButtonState)
Nakor	0:2743c73d648d	70	{
Nakor	12:78d329b4745b	71	while(_buttonPin->read())
Nakor	12:78d329b4745b	72	{
Nakor	12:78d329b4745b	73	printf("HELD\n");
Nakor	12:78d329b4745b	74	}
Nakor	0:2743c73d648d	75	// if the state has changed, increment the counter
Nakor	0:2743c73d648d	76	if (_buttonState == 1)
Nakor	0:2743c73d648d	77	{
Nakor	0:2743c73d648d	78	// if the current state is 1 then the button
Nakor	0:2743c73d648d	79	// went from off to on:
Nakor	0:2743c73d648d	80	_buttonPushCounter++;
Nakor	10:9b35f63411ad	81	button = 0x01;
Nakor	10:9b35f63411ad	82	//printf("Number of button pushes: %i\n", _buttonPushCounter);
Nakor	0:2743c73d648d	83	}
Nakor	0:2743c73d648d	84	}
Nakor	10:9b35f63411ad	85	else
Nakor	10:9b35f63411ad	86	{
Nakor	10:9b35f63411ad	87	button = 0x00;
Nakor	10:9b35f63411ad	88	}
Nakor	0:2743c73d648d	89	_lastButtonState = _buttonState;
Nakor	10:9b35f63411ad	90	//button = !_buttonState;
Nakor	0:2743c73d648d	91
Nakor	0:2743c73d648d	92
Nakor	0:2743c73d648d	93	if (_buttonPushCounter % 2 == 0)
Nakor	0:2743c73d648d	94	{
Nakor	0:2743c73d648d	95	_redLED->write(1);
Nakor	8:2602108edf40	96	//button = 0x01;
Nakor	0:2743c73d648d	97	}
Nakor	0:2743c73d648d	98	else
Nakor	0:2743c73d648d	99	{
Nakor	0:2743c73d648d	100	_redLED->write(0);
Nakor	8:2602108edf40	101	//button = 0x00;
Nakor	0:2743c73d648d	102	}
Nakor	0:2743c73d648d	103
Nakor	0:2743c73d648d	104	_upState = _upPin->read();
Nakor	0:2743c73d648d	105
Nakor	0:2743c73d648d	106	if (_upState != _lastUpState)
Nakor	0:2743c73d648d	107	{
Nakor	0:2743c73d648d	108	if (_upState == 1)
Nakor	0:2743c73d648d	109	{
Nakor	0:2743c73d648d	110	// if the current state is 1 then the button
Nakor	0:2743c73d648d	111	// went from off to on:
Nakor	0:2743c73d648d	112	_yPosition-=TRACK_INC;
Nakor	6:c0ebd0f8f873	113	if(_limits)
Nakor	0:2743c73d648d	114	{
Nakor	6:c0ebd0f8f873	115	if (_yPosition < 0.0)
Nakor	6:c0ebd0f8f873	116	{
Nakor	6:c0ebd0f8f873	117	_yPosition = 0.0;
Nakor	6:c0ebd0f8f873	118	}
Nakor	0:2743c73d648d	119	}
Nakor	0:2743c73d648d	120	}
Nakor	0:2743c73d648d	121	}
Nakor	0:2743c73d648d	122	_lastUpState = _upState;
Nakor	0:2743c73d648d	123
Nakor	0:2743c73d648d	124
Nakor	0:2743c73d648d	125	_downState = _downPin->read();
Nakor	0:2743c73d648d	126
Nakor	0:2743c73d648d	127	// compare the _buttonState to its previous state
Nakor	0:2743c73d648d	128	if (_downState != _lastDownState)
Nakor	0:2743c73d648d	129	{
Nakor	0:2743c73d648d	130	// if the state has changed, increment the counter
Nakor	0:2743c73d648d	131	if (_downState == 1)
Nakor	0:2743c73d648d	132	{
Nakor	0:2743c73d648d	133	// if the current state is 1 then the button
Nakor	0:2743c73d648d	134	// went from off to on:
Nakor	0:2743c73d648d	135	_yPosition+=TRACK_INC;
Nakor	6:c0ebd0f8f873	136	if(_limits)
Nakor	0:2743c73d648d	137	{
Nakor	6:c0ebd0f8f873	138	if (_yPosition > 1.0)
Nakor	6:c0ebd0f8f873	139	{
Nakor	6:c0ebd0f8f873	140	_yPosition = 1.0;
Nakor	6:c0ebd0f8f873	141	}
Nakor	0:2743c73d648d	142	}
Nakor	0:2743c73d648d	143	}
Nakor	0:2743c73d648d	144	}
Nakor	0:2743c73d648d	145	_lastDownState = _downState;
Nakor	0:2743c73d648d	146
Nakor	0:2743c73d648d	147
Nakor	0:2743c73d648d	148	_leftState = _leftPin->read();
Nakor	0:2743c73d648d	149
Nakor	0:2743c73d648d	150	// compare the _buttonState to its previous state
Nakor	0:2743c73d648d	151	if (_leftState != _lastLeftState)
Nakor	0:2743c73d648d	152	{
Nakor	0:2743c73d648d	153	// if the state has changed, increment the counter
Nakor	0:2743c73d648d	154	if (_leftState == 1)
Nakor	0:2743c73d648d	155	{
Nakor	0:2743c73d648d	156	// if the current state is 1 then the button
Nakor	0:2743c73d648d	157	// went from off to on:
Nakor	0:2743c73d648d	158	_xPosition-=TRACK_INC;
Nakor	6:c0ebd0f8f873	159	if(_limits)
Nakor	0:2743c73d648d	160	{
Nakor	6:c0ebd0f8f873	161	if (_xPosition < 0.0)
Nakor	6:c0ebd0f8f873	162	{
Nakor	6:c0ebd0f8f873	163	_xPosition = 0.0;
Nakor	6:c0ebd0f8f873	164	}
Nakor	0:2743c73d648d	165	}
Nakor	0:2743c73d648d	166	}
Nakor	0:2743c73d648d	167	}
Nakor	0:2743c73d648d	168	_lastLeftState = _leftState;
Nakor	0:2743c73d648d	169
Nakor	0:2743c73d648d	170	_rightState = _rightPin->read();
Nakor	0:2743c73d648d	171
Nakor	0:2743c73d648d	172	// compare the _buttonState to its previous state
Nakor	0:2743c73d648d	173	if (_rightState != _lastRightState)
Nakor	0:2743c73d648d	174	{
Nakor	0:2743c73d648d	175	// if the state has changed, increment the counter
Nakor	0:2743c73d648d	176	if (_rightState == 1)
Nakor	0:2743c73d648d	177	{
Nakor	0:2743c73d648d	178	// if the current state is 1 then the button
Nakor	0:2743c73d648d	179	// went from off to on:
Nakor	0:2743c73d648d	180	_xPosition+=TRACK_INC;
Nakor	6:c0ebd0f8f873	181	if(_limits)
Nakor	0:2743c73d648d	182	{
Nakor	6:c0ebd0f8f873	183	if (_xPosition > 1.0)
Nakor	6:c0ebd0f8f873	184	{
Nakor	6:c0ebd0f8f873	185	_xPosition = 1.0;
Nakor	6:c0ebd0f8f873	186	}
Nakor	0:2743c73d648d	187	}
Nakor	0:2743c73d648d	188	}
Nakor	0:2743c73d648d	189	}
Nakor	0:2743c73d648d	190	_lastRightState = _rightState;
Nakor	0:2743c73d648d	191
Nakor	0:2743c73d648d	192	_blueLED->write(_xPosition);
Nakor	0:2743c73d648d	193	_greenLED->write(_yPosition);
Nakor	0:2743c73d648d	194
Nakor	0:2743c73d648d	195	xPosition = _xPosition;
Nakor	0:2743c73d648d	196	yPosition = _yPosition;
Nakor	0:2743c73d648d	197
Nakor	0:2743c73d648d	198
Nakor	6:c0ebd0f8f873	199
Nakor	6:c0ebd0f8f873	200	#if DEBUG_POSITION
Nakor	4:3d1791d6608a	201	int ixPosition = _xPosition * 95;
Nakor	4:3d1791d6608a	202	int iyPosition = _yPosition * 63;
Nakor	4:3d1791d6608a	203
Nakor	6:c0ebd0f8f873	204
Nakor	6:c0ebd0f8f873	205
Nakor	0:2743c73d648d	206	if (_outputTimer.read_ms() > 1000)
Nakor	0:2743c73d648d	207	{
Nakor	4:3d1791d6608a	208	printf("Position: (x%i, y%i)\n", ixPosition, iyPosition);
Nakor	0:2743c73d648d	209
Nakor	0:2743c73d648d	210	_outputTimer.reset();
Nakor	0:2743c73d648d	211
Nakor	0:2743c73d648d	212	}
Nakor	6:c0ebd0f8f873	213	#endif
Nakor	0:2743c73d648d	214
Nakor	7:229fc175e05e	215	}
Nakor	7:229fc175e05e	216
Nakor	7:229fc175e05e	217	void trackballer::reset()
Nakor	7:229fc175e05e	218	{
Nakor	7:229fc175e05e	219	_xPosition = 0.5;
Nakor	7:229fc175e05e	220	_yPosition = 0.5;
Nakor	0:2743c73d648d	221	}

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Type:	Library
Created:	19 Feb 2011
Imports:	7
Forks:	0
Commits:	16
Dependents:	0
Dependencies:	0
Followers:	2

trackballer.cpp@12:78d329b4745b, 2011-02-20 (annotated)

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