//This is a clock program. The clock in this code counts up from 00:00 to 99:59. There is a RESET, PAUSE and LOAD functionality incorporated into the clock.
//The range of the clock( the time it should count before it resets can be altered in the code. Also it can very easily be turned into a down counter by changing lines 101 and 105 to decrement.

#include <SevenSegmentTM1637.h>



#define CLK 2//Pins for TM1637       
#define DIO 3
#define PAUSE 4
#define RESET 5
#define LOAD 6
#define ANALOG_INPUT A0

int min0, min1, min2, sec0, sec1, sec2;
int ctrl_pause= 0, ctrl_reset= 0, ctrl_load = 0, one_second_count = 0;
int  pause_clock = 0;
int initial_value = 0;
int load_clock = 0;

SevenSegmentTM1637 game_clock(CLK,DIO);

void setup(){
  Serial.begin(9600);  
  game_clock.init();
  game_clock.on(); 
  //BRIGHT_TYPICAL = 2,BRIGHT_DARKEST = 0,BRIGHTEST = 7;

  pinMode(PAUSE,INPUT);
  pinMode(RESET,INPUT);
  pinMode(LOAD,INPUT);

  game_clock.setCursor(0,0);
  game_clock.print(1);
  game_clock.setCursor(0,1);
  game_clock.print(2);
  game_clock.setCursor(0,2);
  game_clock.print(3);
  game_clock.setCursor(0,3);
  game_clock.print(4);
  game_clock.setColonOn(true);
  delay(1500);//Delay to let system boot

 
}//end "setup()"

void loop()
{
  if(digitalRead(RESET) == HIGH)
  {
    ctrl_reset = HIGH;
  }
  if(digitalRead(RESET) == LOW and ctrl_reset == HIGH)
  {
    min0 = 0;
    sec0 = 0;
    pause_clock = 0;
    ctrl_reset = LOW;
  }

  if(digitalRead(LOAD) == HIGH)
  {
    ctrl_load = HIGH;
  }
  if(digitalRead(LOAD) == LOW and ctrl_load == HIGH)
  {
    initial_value = analogRead(ANALOG_INPUT);
    load_clock = 5.858 * initial_value;
    sec0 = load_clock%60;
    min0 = load_clock/60;
    ctrl_load = LOW;
    pause_clock = 0;
  }
  
  if(digitalRead(PAUSE) == HIGH)
  {
    ctrl_pause = HIGH;
  }

  if(digitalRead(PAUSE) == LOW and ctrl_pause == HIGH)
  {
    if(pause_clock == 0)
    {
      pause_clock = 1;
    }
    else
    {
      pause_clock = 0;
    }
    ctrl_pause = LOW;
  }

  if(pause_clock == 1)
  {
    one_second_count++;
    if(one_second_count == 90)
    {
      sec0++;
      if(sec0 == 60)
      {
        sec0 = 0;
        min0++;
      }
      one_second_count = 0;
    }
  }

  sec1 = sec0%10;
  sec2 = (sec0/10)%10;
  min1 = min0%10;
  min2 = (min0/10)%10;
  
  game_clock.setCursor(0,0);
  game_clock.print(min2);
  game_clock.setCursor(0,1);
  game_clock.print(min1);
  game_clock.setCursor(0,2);
  game_clock.print(sec2);
  game_clock.setCursor(0,3);
  game_clock.print(sec1);


  //Serial.print("one_second_count = ");
  //Serial.println(one_second_count);
  //Serial.print("sec0 = ");
  //Serial.println(sec0);
  //Serial.print("sec1 = ");
  //Serial.println(sec1);
  //Serial.print("sec2 = ");
  //Serial.println(sec2);
  //Serial.print("min0 = ");
  //Serial.println(min0);
  //Serial.print("min1 = ");
  //Serial.println(min1);
  //Serial.print("min2 = ");
  //Serial.println(min2);
  delay(10);
}