/*
https://forum.arduino.cc/t/my-7-segment-4-digit-display-is-showing-6-6-6-6-and-a-a-a/1263953

*/



#include <SevSeg.h>


SevSeg sevseg; // Instantiate a seven segment object
uint8_t state = 0;
uint8_t numDigits;
const uint32_t INTERVAL_MS = 500;

byte stateSys = 0;
unsigned long lastStep;
unsigned long intervalStep = 1000;
int count = 1;
int counts = 0;
float total = 0.000;
int ds = 0;


void setup() {
  // put your setup code here, to run once:
  pinMode(2, OUTPUT);
  pinMode(6, INPUT);
  pinMode(3, OUTPUT);
  pinMode(4, OUTPUT);
  pinMode(5, OUTPUT);
  numDigits = 4;
  byte digitPins[] = {7, 8, 9, 10};
  byte segmentPins[] = {12, 13, 14, 15, 16, 17, 18, 19};
  bool resistorsOnSegments = false; // 'false' means resistors are on digit pins
  byte hardwareConfig = COMMON_ANODE; // See README.md for options
  bool updateWithDelays = false; // Default 'false' is Recommended
  bool leadingZeros = false; // Use 'true' if you'd like to keep the leading zeros
  bool disableDecPoint = false;
  bool stop = false;
  sevseg.begin(hardwareConfig, numDigits, digitPins, segmentPins, resistorsOnSegments, updateWithDelays, leadingZeros, disableDecPoint);
  sevseg.setBrightness(90); // Set brightness if needed
  Serial.begin(9600); // Initialize serial communication

}



void loop() {

  
unsigned long now  = millis();
//pump that screen..
sevseg.refreshDisplay();

 if (now - lastStep >= intervalStep){
    switch (stateSys){

       case 0: count = 1;
               sevseg.blank();
               stateSys++;  
               break; 
       case 1: if (count < 5){
               count++;
               digitalWrite(count, HIGH);
               lastStep = now;
               intervalStep = 1000;
                } else {
                  stateSys++;
                  lastStep = now;
                   randomSeed(analogRead(0));
                  intervalStep = random(1000,5000);
                }
               break;
       case 2: if (count > 1){
                   digitalWrite(count, LOW);
                   count--;
                  } else{
                     stateSys++;
                     counts = 0;
                  }
               break;
      case 3: if (digitalRead(6)== LOW){
                  counts++;
                  lastStep = now;
                  intervalStep = 1; //??? that's fast
                 } else stateSys++;
                break;
      case 4:  total = (float)counts / 1000;
               Serial.println(total+0.075, 3 );//why the math??
               ds = round(total);
               sevseg.setNumber(ds); // Display the calculated value 
               stateSys++;
               lastStep = now;
               intervalStep = 5000;
               break;
       case 5: stateSys = 0;
               break;                  
   } //end switch
 } //end time for a step
  
}