Aaron Goselin / Mbed 2 deprecated trackballer_SFE

Just an example program for Sparkfun's Trackballer breakout board.

Dependencies:   mbed

main.cpp@0:dd150b03a225, 2011-02-17 (annotated)

Committer:
Nakor
Date:
Thu Feb 17 20:55:46 2011 +0000
Revision:
0:dd150b03a225
First commit.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Nakor 0:dd150b03a225 1 #include "mbed.h"
Nakor 0:dd150b03a225 2
Nakor 0:dd150b03a225 3 #define TRACK_INC 0.02
Nakor 0:dd150b03a225 4
Nakor 0:dd150b03a225 5 DigitalIn buttonPin(p8);
Nakor 0:dd150b03a225 6 DigitalIn rightPin(p15);
Nakor 0:dd150b03a225 7 DigitalIn leftPin(p16);
Nakor 0:dd150b03a225 8 DigitalIn downPin(p17);
Nakor 0:dd150b03a225 9 DigitalIn upPin(p18);
Nakor 0:dd150b03a225 10
Nakor 0:dd150b03a225 11 PwmOut blueLED(p23);
Nakor 0:dd150b03a225 12 PwmOut redLED(p24);
Nakor 0:dd150b03a225 13 PwmOut greenLED(p25);
Nakor 0:dd150b03a225 14 PwmOut whiteLED(p26);
Nakor 0:dd150b03a225 15
Nakor 0:dd150b03a225 16 Timer outputTimer;
Nakor 0:dd150b03a225 17 Serial PC(USBTX, USBRX);
Nakor 0:dd150b03a225 18
Nakor 0:dd150b03a225 19
Nakor 0:dd150b03a225 20 int buttonPushCounter = 0; // counter for the number of button presses
Nakor 0:dd150b03a225 21
Nakor 0:dd150b03a225 22 char buttonState = 0; // current state of the button
Nakor 0:dd150b03a225 23 char lastButtonState = 0; // previous state of the button
Nakor 0:dd150b03a225 24
Nakor 0:dd150b03a225 25 char upState = 0;
Nakor 0:dd150b03a225 26 char downState = 0;
Nakor 0:dd150b03a225 27 char leftState = 0;
Nakor 0:dd150b03a225 28 char rightState = 0;
Nakor 0:dd150b03a225 29 char lastUpState = 0;
Nakor 0:dd150b03a225 30 char lastDownState = 0;
Nakor 0:dd150b03a225 31 char lastLeftState = 0;
Nakor 0:dd150b03a225 32 char lastRightState = 0;
Nakor 0:dd150b03a225 33
Nakor 0:dd150b03a225 34 float xPosition = 0.0;
Nakor 0:dd150b03a225 35 float yPosition = 0.0;
Nakor 0:dd150b03a225 36
Nakor 0:dd150b03a225 37
Nakor 0:dd150b03a225 38
Nakor 0:dd150b03a225 39 void setup()
Nakor 0:dd150b03a225 40 {
Nakor 0:dd150b03a225 41 PC.baud(230400);
Nakor 0:dd150b03a225 42
Nakor 0:dd150b03a225 43 buttonPin.mode(PullUp);
Nakor 0:dd150b03a225 44
Nakor 0:dd150b03a225 45 redLED = 0.0;
Nakor 0:dd150b03a225 46 greenLED = 0.0;
Nakor 0:dd150b03a225 47 blueLED = 0.0;
Nakor 0:dd150b03a225 48 whiteLED = 0.0;
Nakor 0:dd150b03a225 49
Nakor 0:dd150b03a225 50 outputTimer.start();
Nakor 0:dd150b03a225 51 }
Nakor 0:dd150b03a225 52
Nakor 0:dd150b03a225 53
Nakor 0:dd150b03a225 54 int main()
Nakor 0:dd150b03a225 55 {
Nakor 0:dd150b03a225 56 setup();
Nakor 0:dd150b03a225 57
Nakor 0:dd150b03a225 58 while (1)
Nakor 0:dd150b03a225 59 {
Nakor 0:dd150b03a225 60
Nakor 0:dd150b03a225 61 buttonState = buttonPin.read();
Nakor 0:dd150b03a225 62
Nakor 0:dd150b03a225 63 // compare the buttonState to its previous state
Nakor 0:dd150b03a225 64 if (buttonState != lastButtonState)
Nakor 0:dd150b03a225 65 {
Nakor 0:dd150b03a225 66 // if the state has changed, increment the counter
Nakor 0:dd150b03a225 67 if (buttonState == 1)
Nakor 0:dd150b03a225 68 {
Nakor 0:dd150b03a225 69 // if the current state is 1 then the button
Nakor 0:dd150b03a225 70 // went from off to on:
Nakor 0:dd150b03a225 71 buttonPushCounter++;
Nakor 0:dd150b03a225 72 printf("Number of button pushes: %i\n", buttonPushCounter);
Nakor 0:dd150b03a225 73 }
Nakor 0:dd150b03a225 74 }
Nakor 0:dd150b03a225 75 lastButtonState = buttonState;
Nakor 0:dd150b03a225 76
Nakor 0:dd150b03a225 77
Nakor 0:dd150b03a225 78 if (buttonPushCounter % 2 == 0)
Nakor 0:dd150b03a225 79 {
Nakor 0:dd150b03a225 80 redLED = 1;
Nakor 0:dd150b03a225 81 }
Nakor 0:dd150b03a225 82 else
Nakor 0:dd150b03a225 83 {
Nakor 0:dd150b03a225 84 redLED = 0;
Nakor 0:dd150b03a225 85 }
Nakor 0:dd150b03a225 86
Nakor 0:dd150b03a225 87 upState = upPin.read();
Nakor 0:dd150b03a225 88
Nakor 0:dd150b03a225 89 if (upState != lastUpState)
Nakor 0:dd150b03a225 90 {
Nakor 0:dd150b03a225 91 if (upState == 1)
Nakor 0:dd150b03a225 92 {
Nakor 0:dd150b03a225 93 // if the current state is 1 then the button
Nakor 0:dd150b03a225 94 // went from off to on:
Nakor 0:dd150b03a225 95 yPosition+=TRACK_INC;
Nakor 0:dd150b03a225 96 if (yPosition > 1.0)
Nakor 0:dd150b03a225 97 {
Nakor 0:dd150b03a225 98 yPosition = 1.0;
Nakor 0:dd150b03a225 99 }
Nakor 0:dd150b03a225 100 }
Nakor 0:dd150b03a225 101 }
Nakor 0:dd150b03a225 102 lastUpState = upState;
Nakor 0:dd150b03a225 103
Nakor 0:dd150b03a225 104
Nakor 0:dd150b03a225 105 downState = downPin.read();
Nakor 0:dd150b03a225 106
Nakor 0:dd150b03a225 107 // compare the buttonState to its previous state
Nakor 0:dd150b03a225 108 if (downState != lastDownState)
Nakor 0:dd150b03a225 109 {
Nakor 0:dd150b03a225 110 // if the state has changed, increment the counter
Nakor 0:dd150b03a225 111 if (downState == 1)
Nakor 0:dd150b03a225 112 {
Nakor 0:dd150b03a225 113 // if the current state is 1 then the button
Nakor 0:dd150b03a225 114 // went from off to on:
Nakor 0:dd150b03a225 115 yPosition-=TRACK_INC;
Nakor 0:dd150b03a225 116 if (yPosition < 0.0)
Nakor 0:dd150b03a225 117 {
Nakor 0:dd150b03a225 118 yPosition = 0.0;
Nakor 0:dd150b03a225 119 }
Nakor 0:dd150b03a225 120 }
Nakor 0:dd150b03a225 121 }
Nakor 0:dd150b03a225 122 lastDownState = downState;
Nakor 0:dd150b03a225 123
Nakor 0:dd150b03a225 124
Nakor 0:dd150b03a225 125 leftState = leftPin.read();
Nakor 0:dd150b03a225 126
Nakor 0:dd150b03a225 127 // compare the buttonState to its previous state
Nakor 0:dd150b03a225 128 if (leftState != lastLeftState)
Nakor 0:dd150b03a225 129 {
Nakor 0:dd150b03a225 130 // if the state has changed, increment the counter
Nakor 0:dd150b03a225 131 if (leftState == 1)
Nakor 0:dd150b03a225 132 {
Nakor 0:dd150b03a225 133 // if the current state is 1 then the button
Nakor 0:dd150b03a225 134 // went from off to on:
Nakor 0:dd150b03a225 135 xPosition-=TRACK_INC;
Nakor 0:dd150b03a225 136 if (xPosition < 0.0)
Nakor 0:dd150b03a225 137 {
Nakor 0:dd150b03a225 138 xPosition = 0.0;
Nakor 0:dd150b03a225 139 }
Nakor 0:dd150b03a225 140 }
Nakor 0:dd150b03a225 141 }
Nakor 0:dd150b03a225 142 lastLeftState = leftState;
Nakor 0:dd150b03a225 143
Nakor 0:dd150b03a225 144 rightState = rightPin.read();
Nakor 0:dd150b03a225 145
Nakor 0:dd150b03a225 146 // compare the buttonState to its previous state
Nakor 0:dd150b03a225 147 if (rightState != lastRightState)
Nakor 0:dd150b03a225 148 {
Nakor 0:dd150b03a225 149 // if the state has changed, increment the counter
Nakor 0:dd150b03a225 150 if (rightState == 1)
Nakor 0:dd150b03a225 151 {
Nakor 0:dd150b03a225 152 // if the current state is 1 then the button
Nakor 0:dd150b03a225 153 // went from off to on:
Nakor 0:dd150b03a225 154 xPosition+=TRACK_INC;
Nakor 0:dd150b03a225 155 if (xPosition > 1.0)
Nakor 0:dd150b03a225 156 {
Nakor 0:dd150b03a225 157 xPosition = 1.0;
Nakor 0:dd150b03a225 158 }
Nakor 0:dd150b03a225 159 }
Nakor 0:dd150b03a225 160 }
Nakor 0:dd150b03a225 161 lastRightState = rightState;
Nakor 0:dd150b03a225 162
Nakor 0:dd150b03a225 163 blueLED = xPosition;
Nakor 0:dd150b03a225 164 greenLED = yPosition;
Nakor 0:dd150b03a225 165
Nakor 0:dd150b03a225 166
Nakor 0:dd150b03a225 167
Nakor 0:dd150b03a225 168 if (outputTimer.read_ms() > 1000)
Nakor 0:dd150b03a225 169 {
Nakor 0:dd150b03a225 170 printf("Position: (x%f, y%f)\n", xPosition, yPosition);
Nakor 0:dd150b03a225 171
Nakor 0:dd150b03a225 172 outputTimer.reset();
Nakor 0:dd150b03a225 173
Nakor 0:dd150b03a225 174 }
Nakor 0:dd150b03a225 175 }
Nakor 0:dd150b03a225 176 }