/*
Voltaat learn (http://learn.voltaat.com)
Link for full tutorial:

Tutorial: Display the distance value on a TFT Display with arduino!
Wire Library:
Adafruit_GFX Library:
Wire Library:


The purpose of this sketch is to display the distance values obtained from the ultrasonic sensor on the TFT Display.

Connections from the Arduino to the breadboard:

• Arduino GND pin → Breadboard ground line

• Arduino 5V pin → Breadboard 5V line

Connections from the ultrasonic sensor:

• ultrasonic sensor VCC pin → Breadboard 5V line

• ultrasonic sensor GND pin → Breadboard ground line

• ultrasonic sensor Trig pin → Arduino pin 3

• ultrasonic sensor Echo pin → Arduino pin 2

Connections from the TFT Display to the breadboard:

• TFT Display VCC pin → Breadboard 5V line

• TFT Display GND pin → Breadboard ground line

• TFT Display LED pin → Breadboard 5V line

Connections from the l298n motor driver to arduino :

• TFT Display CS pin → Arduino pin 10

• TFT Display RST pin → Arduino pin 8

• TFT Display DC pin → Arduino pin 9

• TFT Display MOSI pin → Arduino pin 11

• TFT Display SCK pin → Arduino pin 13

• TFT Display MISO pin → Arduino pin 12

*/

#include "Adafruit_GFX.h"    
#include "Adafruit_ILI9341.h"
#include "Wire.h"
#include  "SPI.h"

//Define pin numbers
#define TFT_DC 9              
#define TFT_CS 10            
#define TFT_RST 8            
#define TFT_MISO 12          
#define TFT_MOSI 11          
#define TFT_CLK 13          

Adafruit_ILI9341 tft = Adafruit_ILI9341(TFT_CS, TFT_DC, TFT_MOSI, TFT_CLK, TFT_RST, TFT_MISO);

char DISTANCEChar[10];

//Define pin numbers
#define trig 3
#define echo 2
//Defines variables and initialize their values
float distance =0;
int t =0;
 
void setup(){
 
Serial.begin(9600);
tft.begin();                      
tft.setRotation(0);            
tft.fillScreen(ILI9341_BLACK);
//Sets the trig Pin as an output
pinMode(trig,OUTPUT);
//Sets the echo Pin as an intput
pinMode(echo,INPUT);
Wire.begin();
printText("DISTANCE", ILI9341_GREEN,20,130,3);

}

void loop()
{
//Clears the trig pin
digitalWrite(trig,LOW);
//delay for 5 micro seconds
delayMicroseconds(5);
//Sets the trig Pin HIGH for 10 micro seconds
digitalWrite(trig,HIGH);
delayMicroseconds(10);
digitalWrite(trig,LOW);
//Reads the echoPin, returns the sound wave travel time in microseconds
t =pulseIn(echo,HIGH);
//Calculating the distance
distance =(t /57);
//Convert float to string
String distanceString = String(distance,1);
distanceString.toCharArray(DISTANCEChar,10);
//Draw a Rectangle
tft.fillRect(50,175,150,40,ILI9341_BLACK);
//printing the Distance value on the TFT Display
printText(DISTANCEChar, ILI9341_WHITE,50,180,4);
printText("Cm", ILI9341_WHITE,180,180,4);
delay(500);

}
//The function of writing words on the TFT Display
void printText(char *text, uint16_t color, int x, int y,int textSize)
{
 tft.setCursor(x, y);
 tft.setTextColor(color);
 tft.setTextSize(textSize);
 tft.setTextWrap(true);
 tft.print(text);
}