How to store a series of inputs as an array and use it in Processing

Projects Programming
1

HI guys,
i m new to the field of electronics and programming,i have this problem where i hv to store the analoginput as an array to use it in processing..the thing is i dunno how to store the constantly changing data from the sensor as an array and how to use the array in processing.plz help.

Moderator edit: Thread title made not all caps. (Nick Gammon)

2

Have you worked through any of the examples in either the Arduino or Processing IDEs?

When is your assignment due?

3

Its not an assignment i m building a radar and i need the array to display the distance..

4

OK, but which of the examples have you worked through, and what does your code look like?

(PS, please don't shout)

5 
#include  
 int i[18]
int pingPin = 13;
int inPin = 12;
 
void setup() {

}
 
void loop()
{
  // establish variables for duration of the ping,
  // and the distance result in inches and centimeters:
  long duration, inches, cm;
 
  // The PING))) is triggered by a HIGH pulse of 2 or more microseconds.
  // Give a short LOW pulse beforehand to ensure a clean HIGH pulse:
  pinMode(pingPin, OUTPUT);
  digitalWrite(pingPin, LOW);
  delayMicroseconds(2);
  digitalWrite(pingPin, HIGH);
  delayMicroseconds(10);
  digitalWrite(pingPin, LOW);
 
  // The same pin is used to read the signal from the PING))): 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.
  pinMode(inPin, INPUT);
  duration = pulseIn(inPin, HIGH);
 
  // convert the time into a distance
  inches = microsecondsToInches(duration);
  cm = microsecondsToCentimeters(duration);
  lcd.print(cm);
  lcd.print("cm");
 
  delay(100);
}
 
long microsecondsToCentimeters(long microseconds)
{
  // The speed of sound is 340 m/s or 29 microseconds per centimeter.
  // The ping travels out and back, so to find the distance of the
  // object we take half of the distance travelled.
  return microseconds / 29 / 2;
}

well this is the code i found i wanna know if i can use the following to get an array

for(int x=0;x<18;x++)
{
cm=i[x]
}

will this give me an array of data?

6 
#include  
 int i[18]

"include" what, exactly?
"i" isn't the best name for an array of soundings, and the declaration needs a semicolon to terminate the line.

for(int x=0;x<18;x++)
{
cm=i[x]
}

Again, needs more semicolon, and this will simply write the same value into all 18 elements of your array.

Have you worked through any examples?

7

Thnx... Apart from the semicolons can you gv me solution to the problem..u hv a valid point that all my arrays will hv the same data what should i do to get the varying data and store em in the different arrays...i hv tried tutorials but doesnt seem to work so plz help.....

8

Must be a slow morning - I didn't notice your assignment was the wrong way round!

for (int i = 0; i < N_READINGS; ++i) {
  sounding [i] = pingRange ();
}
9

Thnx for the reply i ll try the snippet

10

You'll probably want this:

unsigned long pinRange (byte pingPin)
{ 
  pinMode(pingPin, OUTPUT);
  digitalWrite(pingPin, LOW);
  delayMicroseconds(2);
  digitalWrite(pingPin, HIGH);
  delayMicroseconds(10);
  digitalWrite(pingPin, LOW);
 
  pinMode(inPin, INPUT);
  return pulseIn(inPin, HIGH);
}