#include <TinyWireM.h> //Adafruit
#include <TinyLiquidCrystal_I2C.h> //https://www.arduinolibraries.info/libraries/tiny-liquid-crystal_i2-c
#include "A85_PCF8574.h" //https://github.com/debsahu/A85_PCF8574

//#include <LiquidCrystal_I2C.h>
// SDA - P0 - 0 // CLK - P2 - 2

#define PCF8574_ADDRESS (0x20)
#define GPIO_ADDR     0x27

A85_PCF8574 myPCF8574;
TinyLiquidCrystal_I2C lcd(GPIO_ADDR,20,4);
int counter = 0;
int dir = 1;
bool a ;
unsigned int blinkMillis;
unsigned int buttonMillis;

void pattern1(){
  myPCF8574.setBit(0,1); delay(1000);
  myPCF8574.setBit(1,1); delay(1000);
  myPCF8574.setBit(2,1); delay(1000);
  myPCF8574.setBit(3,1); delay(1000);
  myPCF8574.setBit(4,1); delay(1000);
  myPCF8574.setBit(5,1); delay(1000);
  myPCF8574.setBit(6,1); delay(1000);
  myPCF8574.setBit(7,1); delay(1000);

  myPCF8574.setBit(0,0); delay(1000);
  myPCF8574.setBit(1,0); delay(1000);
  myPCF8574.setBit(2,0); delay(1000);
  myPCF8574.setBit(3,0); delay(1000);
  myPCF8574.setBit(4,0); delay(1000);
  myPCF8574.setBit(5,0); delay(1000);
  myPCF8574.setBit(6,0); delay(1000);
  myPCF8574.setBit(7,0); delay(1000);

}

void pattern2(){
  myPCF8574.setByte(B11110000);
  delay(1000);
  myPCF8574.setByte(B00001111);
  delay(1000);
}

void pattern3(){
  myPCF8574.setByte(B10101010);
  delay(1000);
  myPCF8574.setByte(B01010101);
  delay(1000);
}

void pattern4(){
  allon();
  delay(1000);
  alloff();
}

void alloff(){
  myPCF8574.setByte(B00000000);
}

void allon(){
  myPCF8574.setByte(B11111111);
}
// Custom Chars
byte Arrow[8] = {
  B00000,
  B00100,
  B00010,
  B11111,
  B00010,
  B00100,
  B00000,
  B00000
};

void setup()
{
  
//TinyWireM.begin();                    // initialize I2C lib
  lcd.init();                           // initialize the lcd
  lcd.backlight();                      // Print a message to the LCD.
    lcd.createChar(0, Arrow);
    lcd.clear();
    lcd.setCursor(0, 0);
    lcd.write(byte(0));
  lcd.setCursor(1, 0);
  lcd.print("1 Pulso    - 250 ms");
  lcd.setCursor(1, 1);
  lcd.print("50 Pulsos  - 7 ms");
  lcd.setCursor(1, 2);
  lcd.print("100 Pulsos - 3,5 ms");
  lcd.setCursor(1, 3);
  lcd.print("50 Pulsos  - 1,45 s");
  //delay (2000);
  myPCF8574.begin(PCF8574_ADDRESS);
}

// The loop function is called in an endless loop
void loop()
{
   //myPCF8574.setByte(B10111110);
   
 // delay(1000);
  //pattern1();
 //allon();
  //delay(1000);
  //alloff();
  //delay(1000);
 // pattern2();
 // delay(1000);
  //pattern3();
 // delay(1000);
 // pattern4();

 static bool state;
  unsigned int currentMillis = millis();
  if ((currentMillis - buttonMillis) >= 50) {
    buttonMillis = currentMillis;
    
    if (state != myPCF8574.getBit(7)) {
      if( state) {
        //  toggle the LED
  myPCF8574.setBit(0,!myPCF8574.getBit(7));

        //digitalWrite(onboardLed, !digitalRead(onboardLed));
      }
      state = !state;
    }
  }

/*
 
 a = myPCF8574.getBit(7);
 if (a){
  myPCF8574.setBit(0,1);
 }
 */
}