Interfacing 8x8 LED Dot Matrix with Arduino

1//We always have to include the library
2#include "LedControl.h"
3
4/*
5  Now we need a LedControl to work with.
6 ***** These pin numbers will probably  not work with your hardware *****
7 pin 12 is connected to the DataIn 
8 pin  11 is connected to LOAD(CS)
9 pin 10 is connected to the CLK 
10 We have only  a single MAX72XX.
11 */
12LedControl lc=LedControl(12,10,11,1);
13
14/* image  switching time */
15unsigned long delaytime1=500;
16unsigned long delaytime2=50;
17void  setup() {
18  /*
19   The MAX72XX is in power-saving mode on startup,
20   we  have to do a wakeup call
21   */
22  lc.shutdown(0,false);
23  /* Set the brightness  to a medium values */
24  lc.setIntensity(0,8);
25  /* and clear the display */
26  lc.clearDisplay(0);
27}
28
29/*
30 This method will display the characters  for the
31 word "Arduino" one after the other on the matrix. 
32 (you need at  least 5x7 leds to see the whole chars)
33 */
34void writeArduinoOnMatrix() {
35  /* here is the data for the characters */
36  byte a[5]={B01111110,B10001000,B10001000,B10001000,B01111110};
37  byte r[5]={B00010000,B00100000,B00100000,B00010000,B00111110};
38  byte d[5]={B11111110,B00010010,B00100010,B00100010,B00011100};
39  byte u[5]={B00111110,B00000100,B00000010,B00000010,B00111100};
40  byte i[5]={B00000000,B00000010,B10111110,B00100010,B00000000};
41  byte n[5]={B00011110,B00100000,B00100000,B00010000,B00111110};
42  byte o[5]={B00011100,B00100010,B00100010,B00100010,B00011100};
43
44  /* now display them one by one with a small delay */
45  lc.setRow(0,0,a[0]);
46  lc.setRow(0,1,a[1]);
47  lc.setRow(0,2,a[2]);
48  lc.setRow(0,3,a[3]);
49  lc.setRow(0,4,a[4]);
50  delay(delaytime1);
51  lc.setRow(0,0,r[0]);
52  lc.setRow(0,1,r[1]);
53  lc.setRow(0,2,r[2]);
54  lc.setRow(0,3,r[3]);
55  lc.setRow(0,4,r[4]);
56  delay(delaytime1);
57  lc.setRow(0,0,d[0]);
58  lc.setRow(0,1,d[1]);
59  lc.setRow(0,2,d[2]);
60  lc.setRow(0,3,d[3]);
61  lc.setRow(0,4,d[4]);
62  delay(delaytime1);
63  lc.setRow(0,0,u[0]);
64  lc.setRow(0,1,u[1]);
65  lc.setRow(0,2,u[2]);
66  lc.setRow(0,3,u[3]);
67  lc.setRow(0,4,u[4]);
68  delay(delaytime1);
69  lc.setRow(0,0,i[0]);
70  lc.setRow(0,1,i[1]);
71  lc.setRow(0,2,i[2]);
72  lc.setRow(0,3,i[3]);
73  lc.setRow(0,4,i[4]);
74  delay(delaytime1);
75  lc.setRow(0,0,n[0]);
76  lc.setRow(0,1,n[1]);
77  lc.setRow(0,2,n[2]);
78  lc.setRow(0,3,n[3]);
79  lc.setRow(0,4,n[4]);
80  delay(delaytime1);
81  lc.setRow(0,0,o[0]);
82  lc.setRow(0,1,o[1]);
83  lc.setRow(0,2,o[2]);
84  lc.setRow(0,3,o[3]);
85  lc.setRow(0,4,o[4]);
86  delay(delaytime1);
87  lc.setRow(0,0,0);
88  lc.setRow(0,1,0);
89  lc.setRow(0,2,0);
90  lc.setRow(0,3,0);
91  lc.setRow(0,4,0);
92  delay(delaytime1);
93}
94
95/*
96  This function lights up some Leds in a row.
97 The pattern will be repeated on  every row.
98 The pattern will blink along with the row-number.
99 row number  4 (index==3) will blink 4 times etc.
100 */
101void rows() {
102  for(int row=0;row<8;row++)  {
103    delay(delaytime2);
104    lc.setRow(0,row,B10100000);
105    delay(delaytime2);
106    lc.setRow(0,row,(byte)0);
107    for(int i=0;i<row;i++) {
108      delay(delaytime2);
109      lc.setRow(0,row,B10100000);
110      delay(delaytime2);
111      lc.setRow(0,row,(byte)0);
112    }
113  }
114}
115
116/*
117  This function lights up some Leds in a column.
118  The pattern will be repeated on every column.
119 The pattern will blink along with  the column-number.
120 column number 4 (index==3) will blink 4 times etc.
121 */
122void  columns() {
123  for(int col=0;col<8;col++) {
124    delay(delaytime2);
125    lc.setColumn(0,col,B10100000);
126    delay(delaytime2);
127    lc.setColumn(0,col,(byte)0);
128    for(int i=0;i<col;i++)  {
129      delay(delaytime2);
130      lc.setColumn(0,col,B10100000);
131      delay(delaytime2);
132      lc.setColumn(0,col,(byte)0);
133    }
134  }
135}
136
137/* 
138 This function  will light up every Led on the matrix.
139 The led will blink along with the row-number.
140  row number 4 (index==3) will blink 4 times etc.
141 */
142void single() {
143  for(int  row=0;row<8;row++) {
144    for(int col=0;col<8;col++) {
145      delay(delaytime2);
146      lc.setLed(0,row,col,true);
147      delay(delaytime2);
148      for(int i=0;i<col;i++)  {
149        lc.setLed(0,row,col,false);
150        delay(delaytime2);
151        lc.setLed(0,row,col,true);
152        delay(delaytime2);
153      }
154    }
155  }
156}
157
158void loop() {  
159  writeArduinoOnMatrix();
160  rows();
161  columns();
162  single();
163}
164