Art and technology research (arduino): 5月 2010

2010年5月31日月曜日

Serial.print(num,type)

http://arduino.cc/en/Serial/Print

the word "byte" confuses me.

a "byte" sometime indicates

"A byte stores an 8-bit unsigned number, from 0 to 255."

but in a　parentheses of Serial.print, "BYTE" indicates 2 bit.

Connecting Arduino and Isadora version2

I made up a more easy way to connect Isadora and Arduino.

First I need to do is write a program for Arduino

------------------------------------------------

int digiPin = 3; // This number will decide the input digital pin

int val = 0; // just a variable for calculation

void setup()
{
Serial.begin(9600); // serial speed
}

void loop()
{
val = digitalRead(digiPin); // read the input pin
Serial.println(99,BYTE);

99 = c It is ASCII Any world is fine as long as match with Isadora,

BYTE indicate 2-bit it seems critical, since other commend did not work.

Serial.println(val); // actual data which will be sent
delay(1000); // control frequency
}

----------------------------------------------

The next step is to run Isadora

Prepare "serial in watcher binary"

Double click it and open a window

type in followings

---------------------------------------------

"c"

value_2 : integer = 2 digits

---------------------------------------------

c must be a small c not a large C

Any word is fine for "value_2"

Since this program deal with 2-bit, the number 2 before digits can be omitted.

Setup serial seed and port.

Make sure serial is enabled.

It should be OK

Main strructure of the Arduino board

http://www.arduino.cc/en/Main/ArduinoBoardDiecimila

Isadora with Arduino video

Succeed connecting Arduino and Isadora

I finally succeed connecting Arduino and Isadora.

This is today's goal, so I am happy.

I am preparing the youtube video.

Basically, I analyzed a source for Arduino made by somebody.
I prepared hardware based on a example that is shown in a tutorial of the Arduino webpage.

http://arduino.cc/en/Tutorial/Button

And then move to the Isadora and setup USB port.

make sure that the seep is set properly and choose right connection(in this case COM3).

Sometime Isadora can not find the USB connection since other software uses it.

In such case , most of the time Arduino programing software using the connection so just close it.

However, somehow it is still unstable, and Isadora was dead couple times.

From the experiment

Test of the switch

2010年5月30日日曜日

Collaboration Isadora and Arduino

I understand a way to connect Isadora and Arduino little bit.

I, actually, could send some data from Arduino to Isadora, but I could not control it since I did not have hardwares and my understanding of program and hardwares was not enough.

As long as I seeing a program for Arduino, it is very simple.

I think that I need to understand Isadora more to solve this issue.

I will hack the ready made program to understand more properly and to control Isadora well tomorrow.

Somehow, my computer had a problem, probably at my video card, while I am running the program on Arduino. It was bit scare me.

else if (program)

It is little bit difficult to control. The location of the increment is critical.

//========program================================
int a;

void setup()
{
Serial.begin(9600);
Serial.println("test of if");
a=1; //set a value for variable a
}
void loop()
{
if (a++, a <>20)
{
Serial.println("else if");
delay(10000);
}
else
{
Serial.println("else section");
delay(5000);

}
}

Useful webpage for Arduino

http://www.ladyada.net/learn/arduino/index.html

Useful webpage for learning

about variable

http://www.javadrive.jp/start/var/index4.html (Japanese)

The webpage is actually designed for Java but it works well.

about increment and decrement

http://www.javadrive.jp/start/ope/index6.html (Japanese)

"if"

http://www.javadrive.jp/start/if/index2.html (Japanese)

Fixed program

Problem fixed version.

test of "if"

Square root test with arduino

Square root　(Memo/note)

Square root

√ is expressed by the symbol sqrt

Therefore, in the program, it will be like following.

| \ c

a| \

| ____\

int a, b, c;

c = sqrt(a*a+b*b);

Center for Contemporary Art in Kitakyusyu(Research)

Center for Contemporary Art in Kitakyusyu(in Japan)

http://www.cca-kitakyushu.org/english/index.html

Icinema(Research)

Icinema does very interesting experiments of interactive video art.

http://www.icinema.unsw.edu.au/index.html

Riley Harmon(Artist research)

Riley Harmon uses Arduino and makes interesting pieces.

http://rileyharmon.com/09/2009/lag

Research

SONY ExploraScience

http://www.sonyexplorascience.jp/english/index.html

Onedotzero (related to art and technology)

Onedotzero has a film festival that mainly about innovated and technological film.

It matches my interesting field.

Onedotzero

http://www.onedotzero.com/events.php

My piece that was made for my NewMedia project 1 will be sent to Onedotzero.

Check my old blog for NewMedia.

http://newmediacourseblog.blogspot.com/

Program test

New Program(original)

This is a program that control LED with more conplex way.
========================================================

int w, r; //define variables
int e=13;

void setup()
{
Serial.begin(9600);
Serial.println("ligth control with variable and increment");
w=1;// add a value to the w in this 'void setup' section
}

/*
Basically, this program use increment to control the length of the LED litten.
Increment add +1 to a variable whenever the loop goes and the length(time) of the delay is
decided by the variable.
*/

void loop()
{
w++; // increment(add +1 whenever this loop goes)
digitalWrite(e, HIGH);
delay(r=w*1000); //r is a variable for length and its value is decided by e variable
digitalWrite(e, LOW);
delay(1000);
}

2010年5月29日土曜日

extra

Calculation of floating decimal point

This is a test of decimal point.

Instead of use "int", I use "double".

Text sent back from Arduino

Arduino

void setup()
{
Serial.begin(9600);
Serial.println("Hellow world");
}
void loop()
{

}

Java

class sample{
public static void main(String args[]){
System.out.println("Hello World");
}

}

Both languages use "println" to display words. It makes easier to understand.

Also escape sequence is available such as , \n.

A little modifications of the program and circuit

FOR Emily
this circuit might have a problem. It was worked perfectly yesterday but it burn my LEDs today. I totally do not know why.

This circuit and program are control the LEDs. The green LED lits 0.1 second and 0.1 second later, the Red lits 0.6 second.

I know very very little bit about Java. Java developed from C and the Arduino has similarity with C. Therefore, I can understand the Arduino program little more easier.

I did a modification.

int nko =11;// LED connected to digital pin 11 which is yellow

int ten =13;// LED connected to digital pin 13 which is red

void setup() {
// initialize the digital pin as an output:
pinMode(nko, OUTPUT);
pinMode(ten, OUTPUT);
}

void loop()
{

digitalWrite(nko, HIGH); // set the LED on

delay(1000); // wait for a second

digitalWrite(nko, LOW); // set the LED off
delay(1000); // wait for a second

digitalWrite(ten, HIGH); // set the LED on
delay(6000);

digitalWrite(ten, LOW); // set the LED off
delay(1000);
}