Hi,
I wrote a simple program for a servo motor. I'm using a GUI written in Processing to communicate with the board. There are two buttons in the GUI: "Open" and "Close". "Open" tells the servo to go to 180 degrees and "Close" tells the servo to go to 0 degrees. Both are if statements within an if loop based on the board being connected. Or so I thought. Both buttons work, but only one or the other, and only once, the loop terminates after one option executes and the board disconnects. I've tried variations "while", "else if". I'm new at this, but I don't understand what I'm missing here. I am attaching the code in the Arduino IDE and Processing.
Thanks for any help
Arduino IDE:
#include <Servo.h>
Servo myservo; // (Library) create servo object to control a servo
// twelve servo objects can be created on most boards
int pos = 0; // variable to store the servo position
void setup() {
myservo.attach(9); // attaches the servo on pin 9 to the servo object
Serial.begin(9600); // start serial communication @9600 bps
}
void loop() {
if(Serial.available()) { // ID data is available to read
char val = Serial.read();
if (val == 'o') { // if o recieved
myservo.write(180);
delay(15); // waits 15ms for the servo to reach the position
}
else if (val == 'c') { // if c received
myservo.write(0);
delay(15); // waits 15ms for the servo to reach the position
}
}
}
Processing:
import controlP5.*; //import ControlP5 library
import processing.serial.*;
Serial port;
ControlP5 cp5; //create ControlP5 object
PFont font;
void setup(){ //same as arduino program
size(300, 400); //window size WxH
printArray(Serial.list()); //prints all available serial ports
port = new Serial(this, "COM14", 9600); // Connection to Arduino on com14
// Create Button
cp5 = new ControlP5(this);
font = createFont("Impact", 34); // font type and size on button
cp5.addButton("OPEN") // "OPEN" is name of button
.setPosition(100, 50) // X and Y coordinates of upper left corner of button
.setSize(100, 60) // (Width, Height)
.setFont(font)
.setColorForeground(color(134, 175, 28))
.setColorActive(color(167, 165, 115))
.setColorBackground(color(148, 182, 112))
;
cp5.addButton("CLOSE") // "CLOSE" is name of button
.setPosition(100, 140) // X and Y coordinates of upper left corner of button
.setSize(100, 60) // (Width, Height)
.setFont(font)
.setColorForeground(color(234, 111, 117))
.setColorActive(color(182, 143, 111))
.setColorBackground(color(205, 112, 112))
;
}
void draw(){ //same as loop in arduino
background (143, 123, 100); //background color of window (R, G, B) or (0 to 255)
//title for window
fill(0, 255, 255); // color of text (R, G, B)
text(":P", 100, 30); // ("text", x coordinate, y coordinate)
}
// add functionality to buttons
void OPEN(){
port.write('o');
}
void CLOSE(){
port.write('c');
}
