trackballer - Control library for the Sparkfun Entertainment Tr…

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Control library for the Sparkfun Entertainment Trackballer breakout board.

trackballer.cpp@14:d566efcd787b, 2011-02-20 (annotated)

Committer:: Nakor
Date:: Sun Feb 20 17:33:59 2011 +0000
Revision:: 14:d566efcd787b
Parent:: 13:b37eb30297a3
Child:: 15:a66aea99500e

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	14:d566efcd787b	68	//int counter1 = 0;
Nakor	14:d566efcd787b	69
Nakor	0:2743c73d648d	70	// compare the _buttonState to its previous state
Nakor	0:2743c73d648d	71	if (_buttonState != _lastButtonState)
Nakor	0:2743c73d648d	72	{
Nakor	14:d566efcd787b	73
Nakor	0:2743c73d648d	74	// if the state has changed, increment the counter
Nakor	0:2743c73d648d	75	if (_buttonState == 1)
Nakor	0:2743c73d648d	76	{
Nakor	14:d566efcd787b	77	/*
Nakor	14:d566efcd787b	78	while(_buttonPin->read() == _buttonState)
Nakor	14:d566efcd787b	79	{
Nakor	14:d566efcd787b	80	//printf("HELD\n");
Nakor	14:d566efcd787b	81	counter1++;
Nakor	14:d566efcd787b	82	if(counter1 > 20)
Nakor	14:d566efcd787b	83	{
Nakor	14:d566efcd787b	84	printf("HELD\n");
Nakor	14:d566efcd787b	85	return;
Nakor	14:d566efcd787b	86	}
Nakor	14:d566efcd787b	87	}
Nakor	14:d566efcd787b	88	*/
Nakor	0:2743c73d648d	89	// if the current state is 1 then the button
Nakor	0:2743c73d648d	90	// went from off to on:
Nakor	0:2743c73d648d	91	_buttonPushCounter++;
Nakor	10:9b35f63411ad	92	button = 0x01;
Nakor	10:9b35f63411ad	93	//printf("Number of button pushes: %i\n", _buttonPushCounter);
Nakor	0:2743c73d648d	94	}
Nakor	0:2743c73d648d	95	}
Nakor	10:9b35f63411ad	96	else
Nakor	10:9b35f63411ad	97	{
Nakor	10:9b35f63411ad	98	button = 0x00;
Nakor	10:9b35f63411ad	99	}
Nakor	0:2743c73d648d	100	_lastButtonState = _buttonState;
Nakor	10:9b35f63411ad	101	//button = !_buttonState;
Nakor	0:2743c73d648d	102
Nakor	0:2743c73d648d	103
Nakor	0:2743c73d648d	104	if (_buttonPushCounter % 2 == 0)
Nakor	0:2743c73d648d	105	{
Nakor	0:2743c73d648d	106	_redLED->write(1);
Nakor	8:2602108edf40	107	//button = 0x01;
Nakor	0:2743c73d648d	108	}
Nakor	0:2743c73d648d	109	else
Nakor	0:2743c73d648d	110	{
Nakor	0:2743c73d648d	111	_redLED->write(0);
Nakor	8:2602108edf40	112	//button = 0x00;
Nakor	0:2743c73d648d	113	}
Nakor	0:2743c73d648d	114
Nakor	0:2743c73d648d	115	_upState = _upPin->read();
Nakor	0:2743c73d648d	116
Nakor	0:2743c73d648d	117	if (_upState != _lastUpState)
Nakor	0:2743c73d648d	118	{
Nakor	0:2743c73d648d	119	if (_upState == 1)
Nakor	0:2743c73d648d	120	{
Nakor	0:2743c73d648d	121	// if the current state is 1 then the button
Nakor	0:2743c73d648d	122	// went from off to on:
Nakor	0:2743c73d648d	123	_yPosition-=TRACK_INC;
Nakor	6:c0ebd0f8f873	124	if(_limits)
Nakor	0:2743c73d648d	125	{
Nakor	6:c0ebd0f8f873	126	if (_yPosition < 0.0)
Nakor	6:c0ebd0f8f873	127	{
Nakor	6:c0ebd0f8f873	128	_yPosition = 0.0;
Nakor	6:c0ebd0f8f873	129	}
Nakor	0:2743c73d648d	130	}
Nakor	0:2743c73d648d	131	}
Nakor	0:2743c73d648d	132	}
Nakor	0:2743c73d648d	133	_lastUpState = _upState;
Nakor	0:2743c73d648d	134
Nakor	0:2743c73d648d	135
Nakor	0:2743c73d648d	136	_downState = _downPin->read();
Nakor	0:2743c73d648d	137
Nakor	0:2743c73d648d	138	// compare the _buttonState to its previous state
Nakor	0:2743c73d648d	139	if (_downState != _lastDownState)
Nakor	0:2743c73d648d	140	{
Nakor	0:2743c73d648d	141	// if the state has changed, increment the counter
Nakor	0:2743c73d648d	142	if (_downState == 1)
Nakor	0:2743c73d648d	143	{
Nakor	0:2743c73d648d	144	// if the current state is 1 then the button
Nakor	0:2743c73d648d	145	// went from off to on:
Nakor	0:2743c73d648d	146	_yPosition+=TRACK_INC;
Nakor	6:c0ebd0f8f873	147	if(_limits)
Nakor	0:2743c73d648d	148	{
Nakor	6:c0ebd0f8f873	149	if (_yPosition > 1.0)
Nakor	6:c0ebd0f8f873	150	{
Nakor	6:c0ebd0f8f873	151	_yPosition = 1.0;
Nakor	6:c0ebd0f8f873	152	}
Nakor	0:2743c73d648d	153	}
Nakor	0:2743c73d648d	154	}
Nakor	0:2743c73d648d	155	}
Nakor	0:2743c73d648d	156	_lastDownState = _downState;
Nakor	0:2743c73d648d	157
Nakor	0:2743c73d648d	158
Nakor	0:2743c73d648d	159	_leftState = _leftPin->read();
Nakor	0:2743c73d648d	160
Nakor	0:2743c73d648d	161	// compare the _buttonState to its previous state
Nakor	0:2743c73d648d	162	if (_leftState != _lastLeftState)
Nakor	0:2743c73d648d	163	{
Nakor	0:2743c73d648d	164	// if the state has changed, increment the counter
Nakor	0:2743c73d648d	165	if (_leftState == 1)
Nakor	0:2743c73d648d	166	{
Nakor	0:2743c73d648d	167	// if the current state is 1 then the button
Nakor	0:2743c73d648d	168	// went from off to on:
Nakor	0:2743c73d648d	169	_xPosition-=TRACK_INC;
Nakor	6:c0ebd0f8f873	170	if(_limits)
Nakor	0:2743c73d648d	171	{
Nakor	6:c0ebd0f8f873	172	if (_xPosition < 0.0)
Nakor	6:c0ebd0f8f873	173	{
Nakor	6:c0ebd0f8f873	174	_xPosition = 0.0;
Nakor	6:c0ebd0f8f873	175	}
Nakor	0:2743c73d648d	176	}
Nakor	0:2743c73d648d	177	}
Nakor	0:2743c73d648d	178	}
Nakor	0:2743c73d648d	179	_lastLeftState = _leftState;
Nakor	0:2743c73d648d	180
Nakor	0:2743c73d648d	181	_rightState = _rightPin->read();
Nakor	0:2743c73d648d	182
Nakor	0:2743c73d648d	183	// compare the _buttonState to its previous state
Nakor	0:2743c73d648d	184	if (_rightState != _lastRightState)
Nakor	0:2743c73d648d	185	{
Nakor	0:2743c73d648d	186	// if the state has changed, increment the counter
Nakor	0:2743c73d648d	187	if (_rightState == 1)
Nakor	0:2743c73d648d	188	{
Nakor	0:2743c73d648d	189	// if the current state is 1 then the button
Nakor	0:2743c73d648d	190	// went from off to on:
Nakor	0:2743c73d648d	191	_xPosition+=TRACK_INC;
Nakor	6:c0ebd0f8f873	192	if(_limits)
Nakor	0:2743c73d648d	193	{
Nakor	6:c0ebd0f8f873	194	if (_xPosition > 1.0)
Nakor	6:c0ebd0f8f873	195	{
Nakor	6:c0ebd0f8f873	196	_xPosition = 1.0;
Nakor	6:c0ebd0f8f873	197	}
Nakor	0:2743c73d648d	198	}
Nakor	0:2743c73d648d	199	}
Nakor	0:2743c73d648d	200	}
Nakor	0:2743c73d648d	201	_lastRightState = _rightState;
Nakor	0:2743c73d648d	202
Nakor	0:2743c73d648d	203	_blueLED->write(_xPosition);
Nakor	0:2743c73d648d	204	_greenLED->write(_yPosition);
Nakor	0:2743c73d648d	205
Nakor	0:2743c73d648d	206	xPosition = _xPosition;
Nakor	0:2743c73d648d	207	yPosition = _yPosition;
Nakor	0:2743c73d648d	208
Nakor	0:2743c73d648d	209
Nakor	6:c0ebd0f8f873	210
Nakor	6:c0ebd0f8f873	211	#if DEBUG_POSITION
Nakor	4:3d1791d6608a	212	int ixPosition = _xPosition * 95;
Nakor	4:3d1791d6608a	213	int iyPosition = _yPosition * 63;
Nakor	4:3d1791d6608a	214
Nakor	6:c0ebd0f8f873	215
Nakor	6:c0ebd0f8f873	216
Nakor	0:2743c73d648d	217	if (_outputTimer.read_ms() > 1000)
Nakor	0:2743c73d648d	218	{
Nakor	4:3d1791d6608a	219	printf("Position: (x%i, y%i)\n", ixPosition, iyPosition);
Nakor	0:2743c73d648d	220
Nakor	0:2743c73d648d	221	_outputTimer.reset();
Nakor	0:2743c73d648d	222
Nakor	0:2743c73d648d	223	}
Nakor	6:c0ebd0f8f873	224	#endif
Nakor	0:2743c73d648d	225
Nakor	7:229fc175e05e	226	}
Nakor	7:229fc175e05e	227
Nakor	7:229fc175e05e	228	void trackballer::reset()
Nakor	7:229fc175e05e	229	{
Nakor	7:229fc175e05e	230	_xPosition = 0.5;
Nakor	7:229fc175e05e	231	_yPosition = 0.5;
Nakor	0:2743c73d648d	232	}

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

trackballer.cpp@14:d566efcd787b, 2011-02-20 (annotated)

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