How to use 4-digit 7-segment without library!

1void Reset()
2{ digitalWrite(D1, !mode);
3  digitalWrite(D2, !mode);
4  digitalWrite(D3, !mode);
5  digitalWrite(D4, !mode); 
6  for(byte i = 0 ;  i < 8 ; i++){
7  digitalWrite(seg[i],mode);
8  }
9}
10
11
12
13void printDigit(char  Chara,int digitPort)
14{ Reset(); 
15  int character = -1;
16  digitalWrite(digitPort,mode);
17  for(int i = 0 ; i < charsInArray ; i++){
18    
19    if(Chara == Char[i][8]){
20      character = i;
21    }
22  }
23  if (character == -1){
24    digitalWrite(pinG,!mode);
25  }else{
26for(int i = 0;i<= 7;i++)
27    {if(mode == common_anode) digitalWrite(seg[i],!Char[character][i]);     
28    else if(mode == common_cathode) digitalWrite(seg[i],Char[character][i]);
29      
30    }
31  }
32}
33
34
35
36
37
38void printDisplay(String Phrase,int  Delay)
39{
40char char1 = Phrase.charAt(0);
41char char2 = Phrase.charAt(1);
42char  char3 = Phrase.charAt(2);
43char char4 = Phrase.charAt(3);
44//char char5 = Phrase.charAt(4);
45char  char1Num = 0;
46char char2Num = 0;
47char char3Num = 0;
48char char4Num = 0;
49int  stringLength = Phrase.length();
50
51if(stringLength < 5){
52  for(int ti = 0  ; ti <= (Delay / 8) ; ti++){
53  if(1 > stringLength) char1 = ' ';
54  else char1  = Phrase.charAt(0);
55  if(2 > stringLength) char2 = ' ';
56  else char2 = Phrase.charAt(1);
57  if(3 > stringLength) char3 = ' ';
58  else char3 = Phrase.charAt(2);
59  if(4  > stringLength) char4 = ' ';
60  else char4 = Phrase.charAt(3);
61 /* Reset();
62  delay(2);*/
63  printDigit(char1,D1);
64  delay(2);
65  printDigit(char2,D2);
66  delay(2);
67  printDigit(char3,D3);
68  delay(2);
69  printDigit(char4,D4);
70  delay(2);
71  }
72}else{
73for(int t = 0 ; t <= stringLength ; t++){
74  for(int  ti = 0 ; ti <= (Delay / 8) ; ti++){
75  
76  /*Reset();
77  delay(2);*/
78  printDigit(char1,D1);
79  delay(2);
80  printDigit(char2,D2);
81  delay(2);
82  printDigit(char3,D3);
83  delay(2);
84  printDigit(char4,D4);
85  delay(2);
86}
87  if(t + 1 > stringLength)  char1 = ' ';
88  else char1 = Phrase.charAt(t);
89  if((t + 2) > stringLength)  char2 = ' ';
90  else char2 = Phrase.charAt(t + 1);
91  if((t + 3) > stringLength)  char3 = ' ';
92  else char3 = Phrase.charAt(t + 2);
93  if((t + 4) > stringLength)  char4 = ' ';
94  else char4 = Phrase.charAt(t + 3);
95  
96  
97  
98}
99}
100}
101  
102

1
2#define DP 30
3
4const int charsInArray = 37;
5byte digits[]{D1,D2,D3,D4};
6byte   seg[] {pinA,pinB,pinC,pinD,pinE,pinF,pinG,pinDP};
7byte Char[37][9] { 
8            
9             {1,1,1,1,1,1,0,0,'0'},//0
10            {0,1,1,0,0,0,0,0,'1'},//1
11             {1,1,0,1,1,0,1,0,'2'},//2
12            {1,1,1,1,0,0,1,0,'3'},//3
13             {0,1,1,0,0,1,1,0,'4'},//4
14            {1,0,1,1,0,1,1,0,'5'},//5
15             {1,0,1,1,1,1,1,0,'6'},//6
16            {1,1,1,0,0,0,0,0,'7'},//7
17             {1,1,1,1,1,1,1,0,'8'},//8
18            {1,1,1,1,0,1,1,0,'9'}, //9
19             {1,1,1,0,1,1,1,0,'a'},//A/1
20            {0,0,1,1,1,1,1,0,'b'},//b/2
21             {0,0,0,1,1,0,1,0,'c'},//C/3
22            {0,1,1,1,1,0,1,0,'d'},//d/4
23             {1,0,0,1,1,1,1,0,'e'},//E/5
24            {1,0,0,0,1,1,1,0,'f'},//F/6
25             {1,0,1,1,1,1,0,0,'g'},//G/7
26            {0,1,1,0,1,1,1,0,'h'},//H/8
27             {0,1,1,0,0,0,0,0,'i'},//I/9
28            {0,1,1,1,1,0,0,0,'j'},//J/10
29             {0,0,0,1,1,1,0,0,'l'},//L/11
30            {0,0,1,0,1,0,1,0,'n'},//n/12
31             {0,0,1,1,1,0,1,0,'o'},//o/13
32            {1,1,0,0,1,1,1,0,'p'},//P/14
33             {1,1,1,0,0,1,1,0,'q'},//q/15
34            {0,0,0,0,1,0,1,0,'r'},//r/16
35             {1,0,1,1,0,1,1,0,'s'},//S/17   looks like number 5
36            {0,0,0,1,1,1,1,0,'t'},//t/18
37             {0,1,1,1,1,1,0,0,'u'},//U/19
38            {0,1,1,1,0,1,1,0,'y'},//y/20
39             {0,0,0,0,0,0,0,1,'.'},//.
40            {0,0,0,0,0,0,1,0,'-'},//dash/negative
41             {0,0,0,1,0,0,0,0,'_'},//underscore
42            {1,0,0,1,1,1,0,0,'['},//[
43             {1,1,1,1,0,0,0,0,']'},//]
44            {1,1,0,0,1,0,1,0,'?'},//?
45             {0,0,0,0,0,0,0,0,' '}//blank
46            
47            };
48

1void Reset()
2{ digitalWrite(D1, !mode);
3  digitalWrite(D2, !mode);
4
5  digitalWrite(D3, !mode);
6  digitalWrite(D4, !mode); 
7  for(byte i = 0 ;
8  i < 8 ; i++){
9  digitalWrite(seg[i],mode);
10  }
11}
12
13
14
15void printDigit(char
16  Chara,int digitPort)
17{ Reset(); 
18  int character = -1;
19  digitalWrite(digitPort,mode);
20
21  for(int i = 0 ; i < charsInArray ; i++){
22    
23    if(Chara == Char[i][8]){
24
25      character = i;
26    }
27  }
28  if (character == -1){
29    digitalWrite(pinG,!mode);
30
31  }else{
32for(int i = 0;i<= 7;i++)
33    {if(mode == common_anode) digitalWrite(seg[i],!Char[character][i]);
34     
35    else if(mode == common_cathode) digitalWrite(seg[i],Char[character][i]);
36
37      
38    }
39  }
40}
41
42
43
44
45
46void printDisplay(String Phrase,int
47  Delay)
48{
49char char1 = Phrase.charAt(0);
50char char2 = Phrase.charAt(1);
51char
52  char3 = Phrase.charAt(2);
53char char4 = Phrase.charAt(3);
54//char char5 = Phrase.charAt(4);
55char
56  char1Num = 0;
57char char2Num = 0;
58char char3Num = 0;
59char char4Num = 0;
60int
61  stringLength = Phrase.length();
62
63if(stringLength < 5){
64  for(int ti = 0
65  ; ti <= (Delay / 8) ; ti++){
66  if(1 > stringLength) char1 = ' ';
67  else char1
68  = Phrase.charAt(0);
69  if(2 > stringLength) char2 = ' ';
70  else char2 = Phrase.charAt(1);
71
72  if(3 > stringLength) char3 = ' ';
73  else char3 = Phrase.charAt(2);
74  if(4
75  > stringLength) char4 = ' ';
76  else char4 = Phrase.charAt(3);
77 /* Reset();
78
79  delay(2);*/
80  printDigit(char1,D1);
81  delay(2);
82  printDigit(char2,D2);
83
84  delay(2);
85  printDigit(char3,D3);
86  delay(2);
87  printDigit(char4,D4);
88
89  delay(2);
90  }
91}else{
92for(int t = 0 ; t <= stringLength ; t++){
93  for(int
94  ti = 0 ; ti <= (Delay / 8) ; ti++){
95  
96  /*Reset();
97  delay(2);*/
98  printDigit(char1,D1);
99
100  delay(2);
101  printDigit(char2,D2);
102  delay(2);
103  printDigit(char3,D3);
104
105  delay(2);
106  printDigit(char4,D4);
107  delay(2);
108}
109  if(t + 1 > stringLength)
110  char1 = ' ';
111  else char1 = Phrase.charAt(t);
112  if((t + 2) > stringLength)
113  char2 = ' ';
114  else char2 = Phrase.charAt(t + 1);
115  if((t + 3) > stringLength)
116  char3 = ' ';
117  else char3 = Phrase.charAt(t + 2);
118  if((t + 4) > stringLength)
119  char4 = ' ';
120  else char4 = Phrase.charAt(t + 3);
121  
122  
123  
124}
125}
126}
127
128  
129

1
2#define DP 30
3
4const int charsInArray = 37;
5byte digits[]{D1,D2,D3,D4};
6byte  seg[] {pinA,pinB,pinC,pinD,pinE,pinF,pinG,pinDP};
7byte Char[37][9] { 
8            
9            {1,1,1,1,1,1,0,0,'0'},//0
10            {0,1,1,0,0,0,0,0,'1'},//1
11            {1,1,0,1,1,0,1,0,'2'},//2
12            {1,1,1,1,0,0,1,0,'3'},//3
13            {0,1,1,0,0,1,1,0,'4'},//4
14            {1,0,1,1,0,1,1,0,'5'},//5
15            {1,0,1,1,1,1,1,0,'6'},//6
16            {1,1,1,0,0,0,0,0,'7'},//7
17            {1,1,1,1,1,1,1,0,'8'},//8
18            {1,1,1,1,0,1,1,0,'9'}, //9
19            {1,1,1,0,1,1,1,0,'a'},//A/1
20            {0,0,1,1,1,1,1,0,'b'},//b/2
21            {0,0,0,1,1,0,1,0,'c'},//C/3
22            {0,1,1,1,1,0,1,0,'d'},//d/4
23            {1,0,0,1,1,1,1,0,'e'},//E/5
24            {1,0,0,0,1,1,1,0,'f'},//F/6
25            {1,0,1,1,1,1,0,0,'g'},//G/7
26            {0,1,1,0,1,1,1,0,'h'},//H/8
27            {0,1,1,0,0,0,0,0,'i'},//I/9
28            {0,1,1,1,1,0,0,0,'j'},//J/10
29            {0,0,0,1,1,1,0,0,'l'},//L/11
30            {0,0,1,0,1,0,1,0,'n'},//n/12
31            {0,0,1,1,1,0,1,0,'o'},//o/13
32            {1,1,0,0,1,1,1,0,'p'},//P/14
33            {1,1,1,0,0,1,1,0,'q'},//q/15
34            {0,0,0,0,1,0,1,0,'r'},//r/16
35            {1,0,1,1,0,1,1,0,'s'},//S/17   looks like number 5
36            {0,0,0,1,1,1,1,0,'t'},//t/18
37            {0,1,1,1,1,1,0,0,'u'},//U/19
38            {0,1,1,1,0,1,1,0,'y'},//y/20
39            {0,0,0,0,0,0,0,1,'.'},//.
40            {0,0,0,0,0,0,1,0,'-'},//dash/negative
41            {0,0,0,1,0,0,0,0,'_'},//underscore
42            {1,0,0,1,1,1,0,0,'['},//[
43            {1,1,1,1,0,0,0,0,']'},//]
44            {1,1,0,0,1,0,1,0,'?'},//?
45            {0,0,0,0,0,0,0,0,' '}//blank
46            
47            };
48

1/*
2  Showing numbers, chars and phrases
3    A
4   ---
5F |   |  B
6  | G |
7   ---
8E |   | C
9  |   |
10   ---
11    D
12
13 */
14  
15
16
17#define common_cathode 0
18#define common_anode 1
19
20bool mode  = common_anode;// my display is common anode
21
22#define pinA 2
23#define pinB  3
24#define pinC 4
25#define pinD 5
26#define pinE 7
27#define pinF 12
28#define  pinG 8
29#define pinDP 13
30#define D1 6
31#define D2 9
32#define D3 10
33#define  D4 11
34
35#include "array.h"
36#include "functions.h"
37
38
39
40
41
42void  setup() {                
43  // initialize the digital pins as outputs.
44  
45  pinMode(pinA, OUTPUT);     
46  pinMode(pinB, OUTPUT);     
47  pinMode(pinC,  OUTPUT);     
48  pinMode(pinD, OUTPUT);     
49  pinMode(pinE, OUTPUT);     
50  pinMode(pinF, OUTPUT);     
51  pinMode(pinG, OUTPUT); 
52  pinMode(pinDP, OUTPUT);  
53  pinMode(D1, OUTPUT);  
54  pinMode(D2, OUTPUT);  
55  pinMode(D3, OUTPUT);  
56  pinMode(D4, OUTPUT); 
57  Serial.begin(9600);
58
59}
60
61
62// the  loop routine runs over and over again forever:
63void loop() {
64  
65 printDisplay("2021",1000);//  use this function to print a string (has numbers, characters or phrases) when the  length of string is 4 or less than 4, the second variable is the time for printing  on display
66 Reset();// use this function to reset the display
67 delay(1000);
68  printDisplay("all usable characters [[ 1 2 3 4 5 6 7 8 9 0 a b c d e f g h i j  l n o p q r s t u y - _ . [ ] ? ]]",300);// when the length of string is more than  4, the second variable is custom speed for movement
69 delay(1000);
70 printDigit('y',D1);//print  any char on any digit
71 delay(1000);
72
73}
74