// W5LUA_counter
// J McMasters Feb 19,2023

#include <LiquidCrystal.h> //Libraries
#include <EEPROM.h>

LiquidCrystal lcd(8, 9, 4, 5, 6, 7); //Arduino pins to lcd

#define bt_up     A1 
#define bt_down   A2 
#define bt_reset  A3 

#define warn 2 

long d1=8, d2=7, d3=6, d4=5, d5=4, d6=3, d7=2, d8=1;

int flag1=0, flag2=0, timer=0;


void setup(){ 
  
 pinMode(bt_up,    INPUT_PULLUP);
 pinMode(bt_down,  INPUT_PULLUP);
 pinMode(bt_reset, INPUT_PULLUP);

 pinMode(warn, OUTPUT);
  
 lcd.begin(16, 2); 
 lcd.clear();
 lcd.setCursor (0,0);
 lcd.print("     W5LUA     ");
 lcd.setCursor (0,1);
 lcd.print("Digital  Counter");
 delay(3000);
 lcd.clear();

if(EEPROM.read(50)==0){
}else{WriteEeprom();}

EEPROM.write(50,0); 

ReadEeprom();

 lcd.setCursor (0,0);
 lcd.print("     W5LUA     ");
 lcd.setCursor (0,1);
 lcd.print("Restoring:");
 lcd.setCursor(11,1);
//lcd.print(d8);
//lcd.print(d7);
//lcd.print(d6);
//lcd.print(d5);
//lcd.print(d4);
lcd.print(d3);
lcd.print(d2);
lcd.print(d1);
 delay(2000);
 lcd.clear();
}

void loop(){  

if(digitalRead (bt_up) == 0){ 
if(flag1==0){ flag1=1;
d1=d1+1;
if(d1>9){d1=0; d2=d2+1;}  
if(d2>9){d2=0; d3=d3+1;} 
if(d3>9){d3=0; d4=d4+1;} 
if(d4>9){d4=0; d5=d5+1;} 
if(d5>9){d5=0; d6=d6+1;} 
if(d6>9){d6=0; d7=d7+1;} 
if(d7>9){d7=0; d8=d8+1;} 
if(d8>9){d8=0;} 
WriteEeprom(); 
 }
}else{flag1=0;}

if(digitalRead (bt_down) == 0){ 
if(flag2==0){ flag2=1;
d1=d1-1;
if(d1<0){d1=9; d2=d2-1;}  
if(d2<0){d2=9; d3=d3-1;} 
if(d3<0){d3=9; d4=d4-1;} 
if(d4<0){d4=9; d5=d5-1;} 
if(d5<0){d5=9; d6=d6-1;} 
if(d6<0){d6=9; d7=d7-1;} 
if(d7<0){d7=9; d8=d8-1;} 
if(d8<0){d8=9;}   
WriteEeprom(); 
 }  
}else{flag2=0;}

if(digitalRead (bt_reset) == 0){ 
digitalWrite(warn, HIGH);
if(timer<200){timer=timer+1;}
if(timer==200){
d1=0, d2=0, d3=0, d4=0, d5=0, d6=0, d7=0, d8=0;
WriteEeprom();
}   
}else{digitalWrite(warn, LOW); timer=0;}


lcd.setCursor (0,0);
lcd.print("  W5LUA Counter");
 
lcd.setCursor(6,1);
//lcd.print(d8);
//lcd.print(d7);
//lcd.print(d6);
//lcd.print(d5);
//lcd.print(d4);
lcd.print(d3);
lcd.print(d2);
lcd.print(d1);

delay(10);
}


void ReadEeprom() {
d1=EEPROM.read(1);
d2=EEPROM.read(2);
d3=EEPROM.read(3);
d4=EEPROM.read(4);
d5=EEPROM.read(5);
d6=EEPROM.read(6);
d7=EEPROM.read(7);
d8=EEPROM.read(8); 
}

void WriteEeprom() {  
EEPROM.write(1, d1);
EEPROM.write(2, d2);
EEPROM.write(3, d3);
EEPROM.write(4, d4);
EEPROM.write(5, d5);
EEPROM.write(6, d6);
EEPROM.write(7, d7);
EEPROM.write(8, d8);
}