Ukur Jarak SR04 P10 DMD Arduinio Nano (SKETCH Arduino)

Ukur Jarak SR04 P10 DMD Arduinio Nano

Sensor Ultrasonic SR04, Arduino Nano,P10 DMD,

2 Modul P10 (64 x 32), 5 VDC 2A

Videonya

SKetch Arduino

#include <SPI.h> 

#include <DMD.h> 

#include <TimerOne.h> 

#include <Arial14.h>

//#include "fixednums8x16.h"

#include "SystemFont5x7.h"

#include "Arial_black_16.h"

const int triggerPin = 2; // was pin 12 defore the DMD

const int echoPin = 3; // was pin13 before the DMD

#define DISPLAYS_ACROSS 2 // i whant to display it on 16x64 pixels

#define DISPLAYS_DOWN 1

DMD dmd(DISPLAYS_ACROSS, DISPLAYS_DOWN);

void ScanDMD() { 

  dmd.scanDisplayBySPI(); 

}

//long microsecondsToInches(long microseconds) {

 // return microseconds / 74 / 2;

//}

long microsecondsToCentimeters(long microseconds) {

  // *** THIS NEEDS TO BE CHECKED FOR THE HC-SR04 ***

  return microseconds / 29 / 2;

} 

void setup() {

  // initialize serial communication for the terminal windows.

  Serial.begin(9600);

  // setup DMD refreshing

  Timer1.initialize( 500 ); 

  Timer1.attachInterrupt( ScanDMD ); 

  // initialise DMD as blank, all LEDs off

  dmd.clearScreen( true ); 

  // choose a font to use

  dmd.selectFont (Arial_black_16);

  // set up pins for ultrasonic sensor

  pinMode(triggerPin, OUTPUT);

  pinMode(echoPin, INPUT);

}

void loop() {

  // establish variables for duration of the ping,

  // and the distance result in inches and centimeters:

  long duration, inches, cm;

  // The device is triggered by a HIGH pulse of 2 or more microseconds.

  // Give a short LOW pulse beforehand to ensure a clean HIGH pulse:

  digitalWrite(triggerPin, LOW);

  delayMicroseconds(2);

  digitalWrite(triggerPin, HIGH);

  delayMicroseconds(5);

  digitalWrite(triggerPin, LOW);

  // The echo pin is used to read the signal from the device: a HIGH

  // pulse whose duration is the time (in microseconds) from the sending

  // of the ping to the reception of its echo off of an object.

  duration = pulseIn(echoPin, HIGH);

  // convert the time into a distance

//  inches = microsecondsToInches(duration);

  cm = microsecondsToCentimeters(duration);

//  Serial.print(inches);

//  Serial.print(" in, ");

//  Serial.print(cm);

//  Serial.print(" cm");

//  Serial.println();

  dmd.clearScreen( true );

  String output(inches);

  //output += " in, ";

  output += cm;

  output += " cm"; 

  char buf[64];//[32];

  output.toCharArray(buf, 64);

  dmd.drawString (0,0, buf, strlen(buf), GRAPHICS_NORMAL );

  Serial.println(output);

  delay(700); // 1000 if on will cause an 1 hz blinking value dispalyed

}