//****************************************************************************
// MULTI-FUNCTIONS-SHIELD
//****************************************************************************





//----------------------------------------------------------------------------
// Due to lack of DS18B20 or LM35 sensors in wokwi library, here is used DHT22
//----------------------------------------------------------------------------
// REQUIRES the following Arduino libraries:
// - DHT Sensor Library: https://github.com/adafruit/DHT-sensor-library
// - Adafruit Unified Sensor Lib: https://github.com/adafruit/Adafruit_Sensor

#include "DHT.h"
#define DHTPIN A4     // Digital pin connected to the DHT sensor
#define DHTTYPE DHT22   // DHT 22  (AM2302), AM2321
// Initialize DHT sensor.
// Note that older versions of this library took an optional third parameter to
// tweak the timings for faster processors.  This parameter is no longer needed
// as the current DHT reading algorithm adjusts itself to work on faster procs.
DHT dht(DHTPIN, DHTTYPE);
//-----------------------------------------------------------------------------
// 4 x led
//-----------------------------------------------------------------------------
#define pinLed1 10
#define pinLed2 11
#define pinLed3 12
#define pinLed4 13
//-----------------------------------------------------------------------------
// 4 Digits 7-segment display controlled by 2 x 74HC595
//-----------------------------------------------------------------------------
#define pinLatch 4
#define pinClock 7
#define pinData 8
//-----------------------------------------------------------------------------
// potentiometer
//-----------------------------------------------------------------------------
#define pinPot A0
//-----------------------------------------------------------------------------
// 3 x pushbuttons
//-----------------------------------------------------------------------------
#define pinButton1 A1
#define pinButton2 A2
#define pinButton3 A3
//-----------------------------------------------------------------------------
// Ultrasonic distance sensor
//-----------------------------------------------------------------------------
#define pinEcho 5
#define pinTrig 6
//-----------------------------------------------------------------------------
// Servo
//-----------------------------------------------------------------------------
#define pinServo 9
//-----------------------------------------------------------------------------
// Buzzer
//-----------------------------------------------------------------------------
#define pinBuzzer 3
//-----------------------------------------------------------------------------

//-----------------------------------------------------------------------------
// This project is mix of two examples on
// http://kabinet.fyzika.net/dilna/ARDUINO/funduino-periferie.php
//-----------------------------------------------------------------------------

unsigned char Dis_table[] = {0xC0,0xF9,0xA4,0xB0,0x99,0x92,0x82,0xF8,0x80,0x90};  // definice cisel 0-10
unsigned char Dis_buf[]   = {0xF1,0xF2,0xF4,0xF8};  // adresy LED zobrazovacu
unsigned char disbuff[]  =  {0, 0, 0, 0};           // pole odesilanych hodnot na LED
int rT=0; // pomocna promena

void setup() {
      Serial.begin(9600);
      pinMode(pinEcho, INPUT);
      pinMode(pinTrig, OUTPUT);

      pinMode(pinLatch,OUTPUT);
      pinMode(pinClock,OUTPUT);
      pinMode(pinData,OUTPUT); // nastaveni vystupu pro segmentovku      
}

void display()
{
      for(char i = 0; i <= 3; i++) // probene zobrazovace a zobrazi, co je treba
      {
             digitalWrite(pinLatch,LOW); // nastavi latch pro zapis
             if(i == 1)
             {
                shiftOut(pinData,pinClock,MSBFIRST,Dis_table[disbuff[i]]&0x7F); // za prvnim cislem rozsvit i des. tecku
             }
             else
             {
                shiftOut(pinData,pinClock,MSBFIRST,Dis_table[disbuff[i]]);
             }
             shiftOut(pinData,pinClock,MSBFIRST,Dis_buf[i] );   // zapise adresu zobrazovace
             digitalWrite(pinLatch,HIGH);    // vypni latch
             delay(2);                       // pockej 2 ms
      }
}

void loop() {
      digitalWrite(pinTrig, LOW);             // signal LOW 2 us
      delayMicroseconds(2);
      digitalWrite(pinTrig, HIGH);            // 10 us signalu HIGH
      delayMicroseconds(10);
      digitalWrite(pinTrig, LOW);             // konec start pulzu
      int distance = pulseIn(pinEcho, HIGH);  // cekam do signalu HIGH
      distance = distance/58;                  // prepocitani na vzdalenost
      Serial.print(((float) distance / 100));                  // odesli vzdalenost
      Serial.println(" m");


      rT= (int) (distance * 1);      // vyrobi 4-ciferne cislo
      
      disbuff[0]= rT/1000;       // pocet tisicu na 1 zobrazovac
      disbuff[1]= rT%1000/100;   // pocet stovek na 2 zobrazovac
      disbuff[2]= rT%100/10;     // pocet desitek na 3 zobrazovac
      disbuff[3]= rT%10;         // pocet jednotek na 4 zobrazovac

      for(char time = 0; time < 20; time++)  // zapisovanim stejne hodnoty se to zdrzi a pritom neblikaji zobrazovace
      {
             display();
      }  
}