#include "SevSeg.h"
SevSeg sevseg;
byte symbol_code[3]={63,7,113};
byte segment_port[7]={2,3,4,5,6,7,8};


#define MAX_NUMBER_STRINGS 12
#define MAX_STRING_SIZE 8
char testStrings[MAX_NUMBER_STRINGS][MAX_STRING_SIZE];

#define PATTERN_CHANGE_TIME 1000
unsigned long timer = millis() - PATTERN_CHANGE_TIME;
byte testStringsPos = 0;

void setup() {
    for(byte i=0;i<7;i++) pinMode(segment_port[i], OUTPUT);
    byte numDigits = 4;
    byte digitPins[] = {14,16,17,20};
    byte segmentPins[] = {9,10,11,12,13,15,18,19};
     bool resistorsOnSegments = false; // 'false' means resistors are on digit pins
  byte hardwareConfig = COMMON_CATHODE; // See README.md for options
  bool updateWithDelays = false; // Default. Recommended
  bool leadingZeros = false; // Use 'true' if you'd like to keep the leading zeros

  sevseg.begin(hardwareConfig, numDigits, digitPins, segmentPins, resistorsOnSegments, updateWithDelays, leadingZeros);
  sevseg.setBrightness(90);

  // Adds set of test strings with periods in various places
  strcpy(testStrings[0], "A..BC.");
  strcpy(testStrings[1], "....");
  strcpy(testStrings[2], ".   ");
  strcpy(testStrings[3], " .  ");
  strcpy(testStrings[4], "  . ");
  strcpy(testStrings[5], "   .");
  strcpy(testStrings[6], ".ABC");
  strcpy(testStrings[7], "A.BCD");
  strcpy(testStrings[8], "A.B.CD");
  strcpy(testStrings[9], "A.B.C.D");
  strcpy(testStrings[10], "A.B.C.D.");
  strcpy(testStrings[11], ". . . .");
}

void display(byte symbol)
{
  for(byte i =0;i<7;i++)
  {
    boolean state = (symbol_code[symbol]>>i)&1;
    digitalWrite(segment_port[i],state);
  }
}

void loop() {
  for(byte i=0;i<3;i++)
  {
    display(10);
    display(i);
    delay(1200);
  }
  if (millis() > (timer + PATTERN_CHANGE_TIME)) {
    sevseg.setChars(testStrings[testStringsPos]);
    testStringsPos++;
    if (testStringsPos >= MAX_NUMBER_STRINGS) testStringsPos = 0;
    timer = millis();
  }

  sevseg.refreshDisplay(); // Must run repeatedly
}