Touchless Electronic Dice Using Arduino

1#include "LedControl.h"  // Include library for the 8x8 LED matrix
2
3//  Pins of the 8x8 LED Matrix
4int PinCLK   = 7;  
5int PinCS    = 6;
6int PinDIN   = 5;
7int IRSensor = 2;        // Connect the IR sensor to arduino pin 2
8
9LedControl  lc    = LedControl(PinDIN, PinCLK, PinCS, 1);
10int statusSensor = 0;
11
12//  Coordinates of the Dice points in the LED matrix
13int DicePic[8][6][2] =
14{
15  { // Matrix und Start Position:
16    {9,9}, {9,8}, {9,7}, {9,6}, {9,5}, {9,4}
17  },
18  { //1:
19    {4,4}, {-1,-1}, {-1,-1}, {-1,-1}, {-1,-1}, {-1,-1} 
20  },
21  { //2:
22    {2,2}, {6,6}, {-1,-1}, {-1,-1}, {-1,-1}, {-1,-1} 
23  },
24  { //3:
25    {2,6}, {6,2}, {4,4}, {-1,-1}, {-1,-1}, {-1,-1} 
26  },
27  { //4:
28    {2,2}, {2,6}, {6,2}, {6,6}, {-1,-1}, {-1,-1}
29  },
30  { //5:
31    {2,2},  {2,6}, {6,2}, {6,6}, {4,4}, {-1,-1}
32  },
33  { //6:
34    {2,1}, {2,4}, {2,7},  {6,1}, {6,4}, {6,7}
35  },
36  { //Start:
37    {-1,-1}, {-1,-1}, {-1,-1}, {-1,-1},  {-1,-1}, {-1,-1}
38  }
39};
40
41
42// Variables of the dice: position, direction,  speed for X and Y
43float DiceXpos[6];
44float DiceXdir[6];
45volatile byte DiceXspeed[6];
46float  DiceYpos[6];
47float DiceYdir[6];
48volatile byte DiceYspeed[6];
49int DiceValue;
50unsigned  long timestamp;
51
52void ShowLed(int x, int y, bool onoff) {
53// Show only,  when x/y in matrix
54  if ((x<8) and (y<8) and (x>=0) and (y>=0)) {
55    lc.setLed(0,  x, y, onoff);
56  };
57};
58
59
60void ShowDot(int x, int y, bool onoff) {
61  // Show or hide dice point
62  ShowLed(x-1, y-1, onoff);
63  ShowLed(x,   y-1,  onoff);
64  ShowLed(x-1, y,   onoff);
65  ShowLed(x,   y,   onoff);
66};
67
68
69//  Show the number on the dice
70void ShowDicePic(int value) {
71  boolean done;
72  // Move all points from current position to destination of DiceValue
73  for  (int i = 0; i < 6; i++) {
74    DiceXspeed[i] = 100;
75    DiceYspeed[i] = 100;
76
77    // Calc x values
78    DiceXdir[i]   = 0;
79    if (int(DiceXpos[i])>DicePic[value][i][0])  {DiceXdir[i]=-1;} 
80    else if (int(DiceXpos[i])<DicePic[value][i][0]) {DiceXdir[i]=1;}  
81    
82    DiceYdir[i]   = 0;
83    if (int(DiceYpos[i])>DicePic[value][i][1])  {DiceYdir[i]=-1;} 
84    else if (int(DiceYpos[i])<DicePic[value][i][1]) {DiceYdir[i]=1;}  
85  };
86
87  do {
88    // Serial.println("Moving");
89    for (int i =  0; i < 6; i++) {
90      if (int(DiceXpos[i])!=DicePic[value][i][0]) {
91        DoStep(DiceXpos[i],DiceXdir[i],DiceXspeed[i],false);
92      };
93      if (int(DiceYpos[i])!=DicePic[value][i][1]) {
94        DoStep(DiceYpos[i],DiceYdir[i],DiceYspeed[i],false);
95      };
96    };
97
98    lc.clearDisplay(0);
99    for (int i = 0; i < 6;  i++) {
100      ShowDot(int(DiceXpos[i]), int(DiceYpos[i]), true);
101    };
102    
103    delay(50);
104
105    // Dice points are on destition position
106    done=true;
107    for (int i = 0; i < 6; i++) {
108      if (int(DiceXpos[i])!=DicePic[value][i][0])  {done=false;}
109      if (int(DiceYpos[i])!=DicePic[value][i][1]) {done=false;}
110    }
111
112  } while (done==false);
113  //Serial.println("End moving");
114
115  lc.clearDisplay(0);
116  for (int i = 0; i < 6; i++) {
117    ShowDot(DicePic[value][i][0],  DicePic[value][i][1], true);
118  };
119};
120
121
122void DoStep(float &pos, float  &dir, volatile byte &sp, bool check) {
123  pos = pos + float(sp)/255*dir;
124
125  if (check==true) {
126    if (pos>7) {
127        pos = 7;
128        dir = dir*(-1);
129    };
130    if (pos<1) {
131        pos = 1;
132        dir = dir*(-1);
133    };
134  };
135  // Velocity decreases every step
136  if (sp>0) {sp=sp-1;}
137};
138
139
140void  setup() {
141  timestamp = millis();
142  Serial.begin(9600);
143  // The MAX7219  is in power-saving mode on startup. So, we need to send a wakeup call
144  lc.shutdown(0,  false);  
145  lc.setIntensity(0, 8); // Set the brightness to a medium values 
146  lc.clearDisplay(0);    // Then clear the display 
147
148  // Innitial animation  
149  for (int i = 0; i < 6; i++) {
150    DiceXpos[i]   = DicePic[7][i][0];
151    DiceYpos[i]   = DicePic[7][i][1];
152    
153    DiceXdir[i]   = random(3)-1;
154    DiceYdir[i]   = random(3)-1;
155    DiceXspeed[i] = random(126)+120;
156    DiceYspeed[i]  = random(126)+120;
157  };
158  
159  lc.clearDisplay(0); // Clear the animation
160  ShowDicePic(6);     // Display number 6 on startup
161  delay(1000);
162
163  pinMode  (IRSensor, INPUT); // Sensor pin INPUT
164};
165
166
167void loop() {
168  delay(50);
169  statusSensor = digitalRead(IRSensor); // Read the data from the IR Sensor
170  Serial.println(statusSensor);
171
172  if (statusSensor == 1){
173    if (millis()-timestamp>2000)  {
174      DiceValue = random(6)+1;          // Generate a number between 1 and  6
175      ShowDicePic(DiceValue);
176    };
177  };
178};
179