/*
testWholeDisplay.ino
-test each segment in the display
-a simple example using Dean Reading's SevSeg library to light up all 4 digits plus the 4 decimal points on a 4 digit display
-the purpose of this example is to ensure you have the wires all hooked up right for every segment and digit, and to troubleshoot the display and wiring
 to ensure *every* segment and period lights up
By Gabriel Staples 
Website: http://www.ElectricRCAircraftGuy.com
My contact info is available by clicking the "Contact Me" tab at the top of my website.
Written: 1 Oct. 2015
Last Updated: 1 Oct. 2015
*/

/*
LICENSING:
-this *example file* only is modified from Dean Reading's original example, and is in the public domain.
Dean Reading's SevSeg library is as follows:
Copyright 2020 Dean Reading
MIT License
*/

#include <SevSeg.h>

SevSeg sevseg; //Instantiate a seven segment controller object

void setup()
{
  byte numDigits = 4;   
  byte digitPins[] = {2, 3, 4, 5}; //Digits: 1,2,3,4 <--put one resistor (ex: 220 Ohms, or 330 Ohms, etc, on each digit pin)
  byte segmentPins[] = {6, 7, 8, 9, 10, 11, 12, 13}; //Segments: A,B,C,D,E,F,G,Period

  sevseg.begin(COMMON_CATHODE, numDigits, digitPins, segmentPins);
  sevseg.setBrightness(10); //Note: 100 brightness simply corresponds to a delay of 2000us after lighting each segment. A brightness of 0 
                            //is a delay of 1us; it doesn't really affect brightness as much as it affects update rate (frequency).
                            //Therefore, for a 4-digit 7-segment + pd, COMMON_ANODE display, the max update rate for a "brightness" of 100 is 1/(2000us*8) = 62.5Hz.
                            //I am choosing a "brightness" of 10 because it increases the max update rate to approx. 1/(200us*8) = 625Hz.
                            //This is preferable, as it decreases aliasing when recording the display with a video camera....I think.
  Serial.begin(9600);
}

void loop()
{
  //local vars
  byte decPlace = 0;
  
  sevseg.setNumber(8888,decPlace);
    
  decPlace++;
  decPlace %= 4; //rollover back to 0 once variable gets to 4; To anyone wondering: the % is called the "modulo" operator; see here for explanation & example: https://www.arduino.cc/en/Reference/Modulo
  sevseg.refreshDisplay(); // Must run repeatedly; don't use blocking code (ex: delay()) in the loop() function or this won't work right
  
}