4 digits 7 segment LED

gistfile1.txt

//ADDED 24 JULY 2017
//model ATA8041AB, 6 pins


int segA = 11; // top
int segB = 7; // right-top
int segF = 10; // left-top

int segD = 2; // bottom
int segE = 1; // left-bottom
int segC = 4; // right-bottom
int segG = 5; // middle

int digit1 = 14; // common cathode for digit1 (i.e. A0)
int digit2 = 15; // common cathode for digit2 (i.e. A1)
int digit3 = 16; // common cathode for digit3 (i.e. A2)
int digit4 = 17; // common cathode for digit4 (i.e. A3)

// Number to display
static int number = 0;
static int ms = 0;
 
void setup() {
  // put your setup code here, to run once:

    // All pins in digital mode
    pinMode(digit1, OUTPUT);
    pinMode(digit2, OUTPUT);
    pinMode(digit3, OUTPUT);
    pinMode(digit4, OUTPUT);
 
    pinMode(segA, OUTPUT);
    pinMode(segB, OUTPUT);
    pinMode(segC, OUTPUT);
    pinMode(segD, OUTPUT);
    pinMode(segE, OUTPUT);
    pinMode(segF, OUTPUT);
    pinMode(segG, OUTPUT);

}



void loop() {
  // put your main code here, to run repeatedly:

//      if( millis() / 1000 > ms )
//    {
//        ms = millis() / 1000;
//        if( ++number > 9999 ) number = 0;
//    }
// 
//    // activate common cathode for digit1
//    digitalWrite(digit1, LOW);
//        // light on segments for 'thousands'
//        drawDigitFast( (number/1000) % 10 );
//        // wait 2 ms
//        delay(2);
//        // turn off all segments
//        drawDigitFast( -1 );
//    // turn off cathode for digit1
//    digitalWrite(digit1, HIGH);
// 
//    digitalWrite(digit2, LOW);
//        drawDigitFast( (number/100) % 10 );
//        delay(2);
//        drawDigitFast( -1 );
//    digitalWrite(digit2, HIGH);
// 
//    digitalWrite(digit3, LOW);
//        drawDigitFast( (number/10) % 10 );
//        delay(2);
//        drawDigitFast( -1 );
//    digitalWrite(digit3, HIGH);
// 
//    digitalWrite(digit4, LOW);
//        drawDigitFast( number % 10 );
//        delay(2);
//        drawDigitFast( -1 );
//    digitalWrite(digit4, HIGH);
}

void drawDigitFast(int n)
{
    const byte aPins[8] = {
        segA, segB, segC, segD, segE, segF, segG
    };
    const byte aSegments[11][8] = {
        //  A     B     C     D     E     F     G
        { HIGH, HIGH, HIGH, HIGH, HIGH, HIGH,  LOW }, // 0
        {  LOW, HIGH, HIGH,  LOW,  LOW,  LOW,  LOW }, // 1
        { HIGH, HIGH,  LOW, HIGH, HIGH,  LOW, HIGH }, // 2
        { HIGH, HIGH, HIGH, HIGH,  LOW,  LOW, HIGH }, // 3
        {  LOW, HIGH, HIGH,  LOW,  LOW, HIGH, HIGH }, // 4
        { HIGH,  LOW, HIGH, HIGH,  LOW, HIGH, HIGH }, // 5
        { HIGH,  LOW, HIGH, HIGH, HIGH, HIGH, HIGH }, // 6
        { HIGH, HIGH, HIGH,  LOW,  LOW,  LOW, LOW  }, // 7
        { HIGH, HIGH, HIGH, HIGH, HIGH, HIGH, HIGH }, // 8
        { HIGH, HIGH, HIGH, HIGH,  LOW, HIGH, HIGH }, // 9
        {  LOW,  LOW,  LOW,  LOW,  LOW,  LOW,  LOW }  // all off
    };
 
    if( n < 0 || n > 10 )
    {
        n = 10;
    }
 
    for( int i = 0; i < 7; i++ )
    {
        digitalWrite( aPins[i], aSegments[n][i] );
    }
}