Simulation of 8X8 Matrix Display | Arduino & Android App

1#include <MaxMatrix.h>
2#include <avr/pgmspace.h>
3
4
5int dIn  = 7;   // DIN pin of MAX7219 module
6int clk = 6;   // CLK pin of MAX7219 module
7int  cs = 5;    // CS pin of MAX7219 module
8
9int maxInUse = 1;    // Number of  MAX7219's connected
10
11MaxMatrix m(dIn, cs, clk, maxInUse);
12
13PROGMEM const  unsigned char CH[] = {
14  3, 8, B00000000, B00000000, B00000000, B00000000, B00000000,  // space
15  1, 8, B01011111, B00000000, B00000000, B00000000, B00000000, // !
16  3, 8, B00000011, B00000000, B00000011, B00000000, B00000000, // "
17  5, 8,  B00010100, B00111110, B00010100, B00111110, B00010100, // #
18  4, 8, B00100100,  B01101010, B00101011, B00010010, B00000000, // $
19  5, 8, B01100011, B00010011,  B00001000, B01100100, B01100011, // %
20  5, 8, B00110110, B01001001, B01010110,  B00100000, B01010000, // &
21  1, 8, B00000011, B00000000, B00000000, B00000000,  B00000000, // '
22  3, 8, B00011100, B00100010, B01000001, B00000000, B00000000,  // (
23  3, 8, B01000001, B00100010, B00011100, B00000000, B00000000, // )
24  5, 8, B00101000, B00011000, B00001110, B00011000, B00101000, // *
25  5, 8, B00001000,  B00001000, B00111110, B00001000, B00001000, // +
26  2, 8, B10110000, B01110000,  B00000000, B00000000, B00000000, // ,
27  4, 8, B00001000, B00001000, B00001000,  B00001000, B00000000, // -
28  2, 8, B01100000, B01100000, B00000000, B00000000,  B00000000, // .
29  4, 8, B01100000, B00011000, B00000110, B00000001, B00000000,  // /
30  4, 8, B00111110, B01000001, B01000001, B00111110, B00000000, // 0
31  3, 8, B01000010, B01111111, B01000000, B00000000, B00000000, // 1
32  4, 8, B01100010,  B01010001, B01001001, B01000110, B00000000, // 2
33  4, 8, B00100010, B01000001,  B01001001, B00110110, B00000000, // 3
34  4, 8, B00011000, B00010100, B00010010,  B01111111, B00000000, // 4
35  4, 8, B00100111, B01000101, B01000101, B00111001,  B00000000, // 5
36  4, 8, B00111110, B01001001, B01001001, B00110000, B00000000,  // 6
37  4, 8, B01100001, B00010001, B00001001, B00000111, B00000000, // 7
38  4, 8, B00110110, B01001001, B01001001, B00110110, B00000000, // 8
39  4, 8, B00000110,  B01001001, B01001001, B00111110, B00000000, // 9
40  2, 8, B01010000, B00000000,  B00000000, B00000000, B00000000, // :
41  2, 8, B10000000, B01010000, B00000000,  B00000000, B00000000, // ;
42  3, 8, B00010000, B00101000, B01000100, B00000000,  B00000000, // <
43  3, 8, B00010100, B00010100, B00010100, B00000000, B00000000,  // =
44  3, 8, B01000100, B00101000, B00010000, B00000000, B00000000, // >
45  4, 8, B00000010, B01011001, B00001001, B00000110, B00000000, // ?
46  5, 8, B00111110,  B01001001, B01010101, B01011101, B00001110, // @
47  4, 8, B01111110, B00010001,  B00010001, B01111110, B00000000, // A
48  4, 8, B01111111, B01001001, B01001001,  B00110110, B00000000, // B
49  4, 8, B00111110, B01000001, B01000001, B00100010,  B00000000, // C
50  4, 8, B01111111, B01000001, B01000001, B00111110, B00000000,  // D
51  4, 8, B01111111, B01001001, B01001001, B01000001, B00000000, // E
52  4, 8, B01111111, B00001001, B00001001, B00000001, B00000000, // F
53  4, 8, B00111110,  B01000001, B01001001, B01111010, B00000000, // G
54  4, 8, B01111111, B00001000,  B00001000, B01111111, B00000000, // H
55  3, 8, B01000001, B01111111, B01000001,  B00000000, B00000000, // I
56  4, 8, B00110000, B01000000, B01000001, B00111111,  B00000000, // J
57  4, 8, B01111111, B00001000, B00010100, B01100011, B00000000,  // K
58  4, 8, B01111111, B01000000, B01000000, B01000000, B00000000, // L
59  5, 8, B01111111, B00000010, B00001100, B00000010, B01111111, // M
60  5, 8, B01111111,  B00000100, B00001000, B00010000, B01111111, // N
61  4, 8, B00111110, B01000001,  B01000001, B00111110, B00000000, // O
62  4, 8, B01111111, B00001001, B00001001,  B00000110, B00000000, // P
63  4, 8, B00111110, B01000001, B01000001, B10111110,  B00000000, // Q
64  4, 8, B01111111, B00001001, B00001001, B01110110, B00000000,  // R
65  4, 8, B01000110, B01001001, B01001001, B00110010, B00000000, // S
66  5, 8, B00000001, B00000001, B01111111, B00000001, B00000001, // T
67  4, 8, B00111111,  B01000000, B01000000, B00111111, B00000000, // U
68  5, 8, B00001111, B00110000,  B01000000, B00110000, B00001111, // V
69  5, 8, B00111111, B01000000, B00111000,  B01000000, B00111111, // W
70  5, 8, B01100011, B00010100, B00001000, B00010100,  B01100011, // X
71  5, 8, B00000111, B00001000, B01110000, B00001000, B00000111,  // Y
72  4, 8, B01100001, B01010001, B01001001, B01000111, B00000000, // Z
73  2, 8, B01111111, B01000001, B00000000, B00000000, B00000000, // [
74  4, 8, B00000001,  B00000110, B00011000, B01100000, B00000000, // \backslash
75  2, 8, B01000001,  B01111111, B00000000, B00000000, B00000000, // ]
76  3, 8, B00000010, B00000001,  B00000010, B00000000, B00000000, // hat
77  4, 8, B01000000, B01000000, B01000000,  B01000000, B00000000, // _
78  2, 8, B00000001, B00000010, B00000000, B00000000,  B00000000, // `
79  4, 8, B00100000, B01010100, B01010100, B01111000, B00000000,  // a
80  4, 8, B01111111, B01000100, B01000100, B00111000, B00000000, // b
81  4, 8, B00111000, B01000100, B01000100, B00101000, B00000000, // c
82  4, 8, B00111000,  B01000100, B01000100, B01111111, B00000000, // d
83  4, 8, B00111000, B01010100,  B01010100, B00011000, B00000000, // e
84  3, 8, B00000100, B01111110, B00000101,  B00000000, B00000000, // f
85  4, 8, B10011000, B10100100, B10100100, B01111000,  B00000000, // g
86  4, 8, B01111111, B00000100, B00000100, B01111000, B00000000,  // h
87  3, 8, B01000100, B01111101, B01000000, B00000000, B00000000, // i
88  4, 8, B01000000, B10000000, B10000100, B01111101, B00000000, // j
89  4, 8, B01111111,  B00010000, B00101000, B01000100, B00000000, // k
90  3, 8, B01000001, B01111111,  B01000000, B00000000, B00000000, // l
91  5, 8, B01111100, B00000100, B01111100,  B00000100, B01111000, // m
92  4, 8, B01111100, B00000100, B00000100, B01111000,  B00000000, // n
93  4, 8, B00111000, B01000100, B01000100, B00111000, B00000000,  // o
94  4, 8, B11111100, B00100100, B00100100, B00011000, B00000000, // p
95  4, 8, B00011000, B00100100, B00100100, B11111100, B00000000, // q
96  4, 8, B01111100,  B00001000, B00000100, B00000100, B00000000, // r
97  4, 8, B01001000, B01010100,  B01010100, B00100100, B00000000, // s
98  3, 8, B00000100, B00111111, B01000100,  B00000000, B00000000, // t
99  4, 8, B00111100, B01000000, B01000000, B01111100,  B00000000, // u
100  5, 8, B00011100, B00100000, B01000000, B00100000, B00011100,  // v
101  5, 8, B00111100, B01000000, B00111100, B01000000, B00111100, // w
102  5, 8, B01000100, B00101000, B00010000, B00101000, B01000100, // x
103  4, 8, B10011100,  B10100000, B10100000, B01111100, B00000000, // y
104  3, 8, B01100100, B01010100,  B01001100, B00000000, B00000000, // z
105  3, 8, B00001000, B00110110, B01000001,  B00000000, B00000000, // {
106  1, 8, B01111111, B00000000, B00000000, B00000000,  B00000000, // |
107  3, 8, B01000001, B00110110, B00001000, B00000000, B00000000,  // }
108  4, 8, B00001000, B00000100, B00001000, B00000100, B00000000, // ~
109};
110
111byte  buffer[40];
112char incomebyte;
113int scrollSpeed = 100;
114char text[100] = "OverAll  Technical Gyan     "; // Initial text message
115int brightness = 15;
116int count  = 0;
117char indicator;
118
119void setup() {
120  m.init(); // MAX7219 initialization
121  m.setIntensity(brightness); // initial led matrix intensity, 0-15
122  Serial.begin(9600);  // Default communication rate of the Bluetooth module
123}
124
125void loop() {
126  // Printing the text
127  printStringWithShift(text, scrollSpeed);
128  
129  if  (Serial.available()) {   // Checks whether data is comming from the serial port
130    indicator = Serial.read();   // Starts reading the serial port, the first byte  from the incoming data
131    
132    // If we have pressed the "Send" button  from the Android App, clear the previous text
133    if (indicator == '1') {
134      for (int i = 0; i < 100; i++) {
135        text[i] = 0;
136        m.clear();}
137      // Read the whole data/string comming from the phone and put it into text[]  array.
138      while (Serial.available()) {
139        incomebyte = Serial.read();
140        text[count] = incomebyte;
141        count++;
142      }
143      count  = 0;
144    }
145    
146    // Adjusting the Scrolling Speed
147    else if (indicator  == '2') {
148      String sS = Serial.readString();
149      scrollSpeed = 150 -  sS.toInt(); // Milliseconds, subtraction because lower value means higher scrolling  speed
150      Serial.println(scrollSpeed);
151    }
152    
153    // Adjusting  the brightness
154    else if (indicator == '3') {
155      String sB = Serial.readString();
156      brightness = sB.toInt();
157      m.setIntensity(brightness);
158    }
159  }
160}
161
162void printStringWithShift(char* s, int shift_speed) {
163  while  (*s != 0) {
164    printCharWithShift(*s, shift_speed);
165    s++;
166  }
167}
168
169void  printCharWithShift(char c, int shift_speed) {
170  if (c < 32) return;
171  c -=  32;
172  memcpy_P(buffer, CH + 7 * c, 7);
173  m.writeSprite(32, 0, buffer);
174  m.setColumn(32 + buffer[0], 0);
175
176  for (int i = 0; i < buffer[0] + 1; i++)
177  {
178    delay(shift_speed);
179    m.shiftLeft(false, false);
180  }
181}
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