//https://forum.arduino.cc/t/adjusting-brightness-of-1-digit-7-segment-indicator-with-74hc595/1262131
/*
  10 SRCLR   MR                 SRCLR (Shift Register Clear)     SRCLR/MR (active LOW)
  11 SRCLK   SHCP    10         SRCLK (Shift Register Clock)     SRCLK/SHCP (storage register clock pin, SPI clock)
  12 RCLK    STCP     9         RCLK (Register Clock / Latch)    RCLK/STCP (shift register clock input, latch pin)
  13 OE      OE       6         OE (Output Enable)               OE (output enable, active LOW)
  14 SER     DS       7         SER (Serial Input)               SER/DS (serial data input, SPI data)
*/


#include <IRremote.h>
int RECV_PIN = 12;
int data = 7;
int OE = 6;
int latch = 9;
int clock = 10;
//int reset = 11;

unsigned long offTime = 0;
boolean changed = false;
int input;

unsigned long debounce_delay = 2000;
unsigned long last_press = 0;
boolean flag = false;
/*
const int button0 = 82;
const int button1 = 22; 
const int button2 = 25;
const int button3 = 13;
const int button4 = 12;
const int button5 = 24;
const int button6 = 94;
const int button7 = 8;
const int button8 = 28;
const int button9 = 90;
const int down = 21;
const int up = 70;
*/

const int button0 = 104;
const int button1 = 48; 
const int down = 2;
const int up = 152;

//1 - dp, 2 - e, 3 - d, 4 - c
//5 - g, 6 - f, 7 - a, 8 - b

void clearDisplay() {
  digitalWrite(latch, LOW);
  shiftOut(data, clock, LSBFIRST, 0b00000000);
  digitalWrite(latch, HIGH);
}

void print_0()
{
  //a,b,c,d,e,f = 1		g,dp = 0
  digitalWrite(latch, LOW);
  //digitalWrite(OE, LOW);
  shiftOut(data, clock, LSBFIRST, 0b01110111);
  digitalWrite(latch, HIGH);
}

void print_1()
{
  //b,c = 1		g,dp,a,e,f,d = 0
  digitalWrite(latch, LOW);
  //digitalWrite(OE, LOW);
  shiftOut(data, clock, LSBFIRST, 0b00010001);
  digitalWrite(latch, HIGH);
}

void setup()
{
  Serial.begin(9600);
  pinMode(RECV_PIN, INPUT);
  IrReceiver.begin(RECV_PIN, DISABLE_LED_FEEDBACK);
  pinMode(data, OUTPUT);
  pinMode(clock, OUTPUT);
  pinMode(latch, OUTPUT);
  pinMode(OE, OUTPUT);
  analogWrite(OE, 0);
  clearDisplay();
  //pinMode(OE, OUTPUT);
  //digitalWrite(OE, LOW);
  
  /*digitalWrite(latch, LOW);
  shiftOut(data, clock, LSBFIRST, 0b01110111);
  digitalWrite(latch, HIGH);*/

}
             
void loop() {
  if (IrReceiver.decode() && millis() - last_press > debounce_delay) {
    input = IrReceiver.decodedIRData.command;
    Serial.print("Received command: ");
    Serial.println(input);
    last_press = millis();
    switch (input) {
    case button0:
      print_0();
      break;
    case button1:
      print_1();
      break;
    case up:
      if (offTime >= 51) {
          offTime -= 51;
        } else {
          offTime = 0;
        }
      changed = true;
      break;
    case down:
      if (offTime <= 204) {
          offTime += 51;
        } else {
          offTime = 255;
        }
      changed = true;
      break;
    }
    if (changed) {
      Serial.print("Updating OE to: ");
      Serial.println(offTime);
      analogWrite(OE, offTime);
      changed = false;
    }
    IrReceiver.resume();
  }
}


















/*
int data = 7;
int OE = 6;
int latch = 9;
int clock = 10;
//int reset = 11;
unsigned long offTime = 0;

//1 - dp, 2 - e, 3 - d, 4 - c
//5 - g, 6 - f, 7 - a, 8 - b
//----------------------------------------------------------------------
void clearDisplay() {
  digitalWrite(latch, LOW);
  shiftOut(data, clock, LSBFIRST, 0b00000000);
  digitalWrite(latch, HIGH);
}
//----------------------------------------------------------------------
void print_0() {
  //a,b,c,d,e,f = 1    g,dp = 0
  digitalWrite(latch, LOW);
  shiftOut(data, clock, LSBFIRST, 0b01110111);
  digitalWrite(latch, HIGH);
}
//----------------------------------------------------------------------
void print_1() {
  //b,c = 1   g,dp,a,e,f,d = 0
  digitalWrite(latch, LOW);
  shiftOut(data, clock, LSBFIRST, 0b00010001);
  digitalWrite(latch, HIGH);
}
//----------------------------------------------------------------------
void setup() {
  Serial.begin(115200);
  pinMode(data, OUTPUT);
  pinMode(clock, OUTPUT);
  pinMode(latch, OUTPUT);
  pinMode(OE, OUTPUT);
  analogWrite(OE, 0);
  clearDisplay();
}
//----------------------------------------------------------------------
void loop() {

  print_0();
  Serial.print("Updating OE to: ");
  Serial.println(offTime);
  analogWrite(OE, offTime);
  delay(1000);
  print_1();
  delay(1000);
}
*/