16. Interface and application programming¶
This week I wrote an application that interfaces with an output.
I controlled the 4plcc rgb led on a satsha kit I made.
Proccessing & Arduino IDE - RGB LED application¶
I controlled this output programming the satsha kit on Arduino IDE for variable functions defined in Processing and so making a communication between these softwares. I could test this varibles by serial with Processing interface.
Processing¶
1st I downloaded [Processing] on my computer and I installed it; The I opened both;
2nd I started approaching to it including GUI libraries, in “example” window, “add library”, to make graphic interfaces. I installed and included the ControlP5 library and I included processing.serial library too, included in Processing already;
3rd so I set size, colors and text of my LED-interface, including buttons too;
4th and respectively on Processing and Arduino IDE I defined for each button variables to send to Arduino.
import processing.serial.*; // including serial library
Serial port;
import controlP5.*; // including Controll
ControlP5 cp5; // making the interface's window
PFont font; // including a new font
void setup(){
size(300, 400); //window size, (width, height)
printArray(Serial.list()); //prints all available serial ports
port = new Serial(this, "COM12"); // defining serial port
cp5 = new ControlP5(this); // ..adding buttons to the interface's window
font = createFont("calibri bold", 20); // features of the included font
cp5.addButton("red") //"red" is the name of this button
.setPosition (10, 75) // coordinates
.setSize(100, 35)
.setFont(font)
;
cp5.addButton("green") //"green" is the name of this button
.setPosition (10, 75) // coordinates
.setSize(100, 35)
.setFont(font)
;
cp5.addButton("off") //"off" is the name of this button
.setPosition (10, 75) // coordinates
.setSize(100, 35)
.setFont(font)
;
}
void draw(){
background(255, 255, 255); // color for the interface's window
text("RGB LED", 125, 30); // main text and coordinates of the interface's window
textFont(font);
fill(100, 70, 200); // color for the main text of the interface's window
}
void red(){
port.write('r'); //... so respectively, pressing buttons Arduino reads functions defined on IDE.
}
void green(){
port.write('g');
}
void off(){
port.write('f');
}
Arduino IDE¶
1st On Arduino IDE I defined pins;
2nd I defined the serial communication;
3rd I defined the Serial.read function;
4th and I programmed the satsha kit to respectively turn on my common cathode LEDs reading these variables.
To turn on my common cathode 4plcc LED I had to set respective digitalWrite fuctions as the opposite LOW state…
#define GREEN 10 //defining pins
#define RED 11
void setup(){
pinMode(GREEN, OUTPUT); //setting pins as outputs
pinMode(RED, OUTPUT);
Serial.begin(9600); //start serial communication @9600 bps
}
void loop(){
if(Serial.available()){ //if serial communication is available,
char val = Serial.read(); //respectively reads
if(val == 'g'){ //..if Arduino reads 'g', turn on LED on pin 10
digitalWrite(GREEN, LOW);
}
if(val == 'r'){ //..if Arduino reads 'r', turn on LED on pin 10
digitalWrite(RED, LOW);
}
if(val == 'f'){ //..if Arduino reads 'f', turn off LEDs on pin 10, 11.
digitalWrite(GREEN, HIGH);
digitalWrite(RED, HIGH);
}
}
}
Reading the application by serial¶
So then I used an Arduino UNO to charge the satsha kit and a 5V power supply for the serial communication with a breadboard; and I connected 5V power supply’s RX and TX to the opposite ones of my satsha kit.
I runt the processing interface and tested it.