LED Metrix 4X5

1#define ROW1 A0
2#define ROW2 A1
3#define ROW3 A2
4#define ROW4  A3
5#define ROW5 A4
6
7#define COL1 2
8#define COL2 3
9#define COL3 4
10#define  COL4 5
11
12const byte rows[]{
13  ROW1,ROW2,ROW3,ROW4,ROW5
14};
15
16void  setColumns(byte b) {
17    digitalWrite(COL1, (~b >> 0) & 0x01); // Get the 1st  bit: 10000000
18    digitalWrite(COL2, (~b >> 1) & 0x01); // Get the 2nd bit: 01000000
19    digitalWrite(COL3, (~b >> 2) & 0x01); // Get the 3rd bit: 00100000
20    digitalWrite(COL4,  (~b >> 3) & 0x01); // Get the 4th bit: 00010000
21}
22
23//fonts
24
25byte  OFF[] = {B0000,B0000,B0000,B0000,B0000};
26byte ALL[] = {B1111,B1111,B1111,B1111,B1111};
27byte  A[] = {B1111,B1001,B1111,B1001,B1001};
28byte S[] = {B1111,B0001,B1111,B1000,B1111};
29byte  U[] = {B1001,B1001,B1001,B1001,B1111};
30byte H[] = {B1001,B1001,B1111,B1001,B1001};
31byte  D[] = {B1111,B1010,B1010,B1010,B1111};
32byte E[] = {B1111,B0001,B0111,B0001,B1111};
33byte  R[] = {B1111,B1001,B1111,B0101,B1001};
34byte J[] = {B1111,B1111,B0110,B0110,B0011};
35byte  N[] = {B1001,B1011,B1111,B1101,B1001};
36byte I[] ={B1111,B0110,B0110,B0110,B1111};
37
38
39
40void  drawScreen(byte buffer2[]){
41    for (byte i = 0; i < 5; i++) {
42    setColumns(buffer2[i]);  // Set columns for this specific row
43          
44    digitalWrite(rows[i],  HIGH);
45    delay(2); // Set this to 50 or 100 if you want to see the multiplexing  effect!
46    digitalWrite(rows[i], LOW);
47        
48    }
49}
50
51float  timeCount = 0;
52
53void setup() {
54  // Serial.begin(9600);
55  for (byte  i = 2; i <= 5; i++)
56  pinMode(i, OUTPUT);
57
58
59  pinMode(A0, OUTPUT);
60  pinMode(A1, OUTPUT);
61  pinMode(A2, OUTPUT);
62  pinMode(A3, OUTPUT);
63  pinMode(A4,  OUTPUT);
64  
65
66}
67
68void loop() {
69    delay(1);
70  timeCount +=  1;
71  
72
73if(timeCount <  80) 
74{
75drawScreen(OFF);
76} 
77else if (timeCount  <  160) 
78{
79drawScreen(OFF);
80} 
81else if (timeCount <  240) 
82{
83drawScreen(S);
84}  
85else if (timeCount <  320) 
86{
87drawScreen(OFF);
88} 
89else if (timeCount  <  400) 
90{
91drawScreen(U);
92} 
93else if (timeCount <  480) 
94{
95drawScreen(OFF);
96}  
97else if (timeCount <  560) 
98{
99drawScreen(D);
100} 
101else if (timeCount  <  640) 
102{
103drawScreen(OFF);
104} 
105else if (timeCount <  720) 
106{
107drawScreen(E);
108}  
109else if (timeCount <  800) 
110{
111drawScreen(OFF);
112} 
113else if (timeCount  <  880) 
114{
115drawScreen(E);
116} 
117else if (timeCount <  960) 
118{
119drawScreen(OFF);
120}  
121else if (timeCount <  1040) 
122{
123drawScreen(R);
124} 
125else if (timeCount  <  1120) 
126{
127drawScreen(OFF);
128} 
129else if (timeCount <  1200) 
130{
131drawScreen(A);
132}  
133else if (timeCount <  1280) 
134{
135drawScreen(OFF);
136} 
137else if (timeCount  <  1360) 
138{
139drawScreen(ALL);
140} 
141else if (timeCount <  1440) 
142{
143drawScreen(OFF);
144}  
145else {
146// back to the start
147timeCount = 0;
148}
149
150
151  
152
153}
154