Interface a 1-digit 7-segment display to an Arduino Uno and use it as an up counter from 0 - 9

7-segDisplay_Ex1.ino

//Use a 1-digit 7-segment display as an up counter from 0 - 9

//0 = ABCDEF
//1 = BC
//2 = ABDEG
//3 = ABCDG

/*Copyright (c) 2019, ProteShea LLC
All rights reserved.
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modification, are permitted provided that the following conditions are met:
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names of its contributors may be used to endorse or promote products
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void setup() {
  //set pins 2 - 9 as output to drive each LED
  pinMode(2, OUTPUT);       //7-seg pin 7, A
  pinMode(3, OUTPUT);       //7-seg pin 6, B
  pinMode(4, OUTPUT);       //7-seg pin 4, C
  pinMode(5, OUTPUT);       //7-seg pin 2, D
  pinMode(6, OUTPUT);       //7-seg pin 1, E
  pinMode(7, OUTPUT);       //7-seg pin 9, F
  pinMode(8, OUTPUT);       //7-seg pin 10, G
  pinMode(9, OUTPUT);       //7-seg pin 5, DP

  //you could also use a for loop to set the pin direction
  //for(int i = 2; i < 10; i++){
    //pinMode(i, OUTPUT);
  //}

}

void loop() {
  for(int j = 0; j < 10; j++){
    segDisplay(j);
    delay(1000);
  }

}


void segDisplay(uint8_t count){
  if (count == 0){
    digitalWrite(2, HIGH);
    digitalWrite(3, HIGH);
    digitalWrite(4, HIGH);
    digitalWrite(5, HIGH);
    digitalWrite(6, HIGH);
    digitalWrite(7, HIGH);
    digitalWrite(8, LOW);
    digitalWrite(9, LOW);
  }

  else if (count == 1){
    digitalWrite(2, LOW);
    digitalWrite(3, HIGH);
    digitalWrite(4, HIGH);
    digitalWrite(5, LOW);
    digitalWrite(6, LOW);
    digitalWrite(7, LOW);
    digitalWrite(8, LOW);
    digitalWrite(9, LOW);
  }

  else if (count == 2){
    digitalWrite(2, HIGH);
    digitalWrite(3, HIGH);
    digitalWrite(4, LOW);
    digitalWrite(5, HIGH);
    digitalWrite(6, HIGH);
    digitalWrite(7, LOW);
    digitalWrite(8, HIGH);
    digitalWrite(9, LOW);
  }

  else if (count == 3){
    digitalWrite(2, HIGH);
    digitalWrite(3, HIGH);
    digitalWrite(4, HIGH);
    digitalWrite(5, HIGH);
    digitalWrite(6, LOW);
    digitalWrite(7, LOW);
    digitalWrite(8, HIGH);
    digitalWrite(9, LOW);
  }

  else if (count == 4){
    digitalWrite(2, LOW);
    digitalWrite(3, HIGH);
    digitalWrite(4, HIGH);
    digitalWrite(5, LOW);
    digitalWrite(6, LOW);
    digitalWrite(7, HIGH);
    digitalWrite(8, HIGH);
    digitalWrite(9, LOW);
  }

  else if (count == 5){
    digitalWrite(2, HIGH);
    digitalWrite(3, LOW);
    digitalWrite(4, HIGH);
    digitalWrite(5, HIGH);
    digitalWrite(6, LOW);
    digitalWrite(7, HIGH);
    digitalWrite(8, HIGH);
    digitalWrite(9, LOW);
  }

  else if (count == 6){
    digitalWrite(2, HIGH);
    digitalWrite(3, LOW);
    digitalWrite(4, HIGH);
    digitalWrite(5, HIGH);
    digitalWrite(6, HIGH);
    digitalWrite(7, HIGH);
    digitalWrite(8, HIGH);
    digitalWrite(9, LOW);
  }

  else if (count == 7){
    digitalWrite(2, HIGH);
    digitalWrite(3, HIGH);
    digitalWrite(4, HIGH);
    digitalWrite(5, LOW);
    digitalWrite(6, LOW);
    digitalWrite(7, LOW);
    digitalWrite(8, LOW);
    digitalWrite(9, LOW);
  }

  else if (count == 8){
    digitalWrite(2, HIGH);
    digitalWrite(3, HIGH);
    digitalWrite(4, HIGH);
    digitalWrite(5, HIGH);
    digitalWrite(6, HIGH);
    digitalWrite(7, HIGH);
    digitalWrite(8, HIGH);
    digitalWrite(9, LOW);
  }

  else if (count == 9){
    digitalWrite(2, HIGH);
    digitalWrite(3, HIGH);
    digitalWrite(4, HIGH);
    digitalWrite(5, LOW);
    digitalWrite(6, LOW);
    digitalWrite(7, HIGH);
    digitalWrite(8, HIGH);
    digitalWrite(9, LOW);
  }
}