#include "LedControl.h"
#include "binary.h"
/* DIN connects to pin 12 CLK connects to pin 11 CS connects to pin 10 */
LedControl lc=LedControl(12,11,10,1);
#define echoPin 2 // attach pin D2 Arduino to pin Echo of HC-SR04
#define trigPin 3 //attach pin D3 Arduino to pin Trig of HC-SR04 // defines variables
int duration; // variable for the duration of sound wave travel
int distance;//variable for the distance measurement
byte dot[8]= {0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00};

void setup()
{
	lc.shutdown(0,false); //sets up 8x8 matrix
	lc.setIntensity(0,16); // Set brightness to a medium value
	lc.clearDisplay(0); // Clear the display
	pinMode(trigPin, OUTPUT); // Sets the trigPin as an OUTPUT
	pinMode(echoPin, INPUT); // Sets the echoPin as an INPUT
}

void printByte(byte character [])
{
  int i = 0;
  for(i=0;i<8;i++)
	{
    lc.setRow(0,i,character[i]);
  }
}

void loop()
{
	digitalWrite(trigPin, LOW);
	delayMicroseconds(2);// Sets the trigPin HIGH (ACTIVE) for 10 microseconds
	digitalWrite(trigPin, HIGH);
	delayMicroseconds(10); //Creates a ten microsecond delay
	digitalWrite(trigPin, LOW); // Reads the echoPin, returns the sound wave travel time in microseconds

	duration = pulseIn(echoPin, HIGH);// Calculating the distance
	distance = duration * 0.034 / 2; // Speed of sound wave divided by 2 (go and back)
  //if (distance > 200)
  int scale = map(distance, 0 , 400, 0, 8);  // Mapping 0 to 400CM with 0 to 8 rows
  if (distance > 200){
	for (int i=0;i<8;i++){
		if (i<= scale){
			dot[i] = 0xff;
      
		}
		else{
			dot[i] = 0x00;
      
		}
	}
  }
	printByte(dot);
	delay(100);
}
/*//The following if statements convert the distance from the ultrasonic sensor into a variable for the matrix called "dm"

if(distance<=50 and distance>=0){

dm=7;

}

//This section of code lights up the LEDs on the matrix

lc.setRow(0,dm,dot[7]);

delay(10);

lc.clearDisplay(0);

if(distance<=100 and distance>=51){

dm=6;

}

lc.setRow(0,dm,dot[7]);

delay(10);

lc.clearDisplay(0);

if(distance<=150 and distance>=101){

dm=5;

}

lc.setRow(0,dm,dot[7]);

delay(10);

lc.clearDisplay(0);

if(distance<=200 and distance>=151){

dm=4;

}

lc.setRow(0,dm,dot[7]);

delay(10);

lc.clearDisplay(0);

if(distance<=250 and distance>=201){

dm=3;

}

lc.setRow(0,dm,dot[7]);

delay(10);

lc.clearDisplay(0);

if(distance<=300 and distance>=251){

dm=2;

}

lc.setRow(0,dm,dot[7]);

delay(10);

lc.clearDisplay(0);

if(distance<=350 and distance>=301){

dm=1;

}

lc.setRow(0,dm,dot[7]);

delay(10);

lc.clearDisplay(0);

if(distance<=400 and distance>=351){

dm=0;

}

lc.setRow(0,dm,dot[7]);

delay(10);

lc.clearDisplay(0);*/




/*#include <Arduino.h>
#include <LedControl.h>

const int LED_DIN = 12;
const int LED_CLK = 11;
const int LED_CS = 10;

const int TRIG = 3;
const int ECHO = 2;

LedControl lc = LedControl(LED_DIN, LED_CLK, LED_CS, 1);

int duration = 0;
int distance = 0;
const int STEP = 400;
const int THRESHOLD = 400;

byte levels[8][8] = {{B00000000, B00000000, B00000000, B00000000, B00000000, B00000000, B00000000, B00000000},
  {B00000000, B00000000, B00000000, B00011000, B00011000, B00000000, B00000000, B00000000},
  {B00000000, B00000000, B00011000, B00111100, B00111100, B00011000, B00000000, B00000000},
  {B00000000, B00011000, B00111100, B01111110, B01111110, B00111100, B00011000, B00000000},
  {B00011000, B00111100, B01111110, B11111111, B11111111, B01111110, B00111100, B00011000},
  {B00111100, B01111110, B11111111, B11111111, B11111111, B11111111, B01111110, B00111100},
  {B01111110, B11111111, B11111111, B11111111, B11111111, B11111111, B11111111, B01111110},
  {B11111111, B11111111, B11111111, B11111111, B11111111, B11111111, B11111111, B11111111}};

void setup() {
  Serial.begin(9600);

  lc.shutdown(0, false);
  lc.setIntensity(0, 15);
  lc.clearDisplay(0);

  pinMode(TRIG, OUTPUT);
  pinMode(ECHO, INPUT);
	delay(100);
  }

void display(int distance) {
  
  int level = min ((distance - THRESHOLD) / STEP, 7);
  for (int i=0; i<8; i++) {
    lc.setRow(0, i, levels[level][i]);
  }
}

void loop() {
  digitalWrite(TRIG, HIGH);
  delayMicroseconds(10);
  digitalWrite(TRIG, LOW);
  duration = pulseIn(ECHO, HIGH);
  if (duration > 0) {
    distance = duration * 340.29 / 2 / 1000;
    display(distance);
  }
	Serial.println(duration);
	Serial.println(distance);
  delay(50);
}*/