Host development platform:
OS: Windows 10
IDE: NetBeans IDE 8.0.2
Programming Language: Java + JavaFX + jSSC
Target platform:
Raspberry Pi 2
OS: Raspbian
IP: 192.168.1.112
Both Host development platform and Target platform in the same Network.
(How to set Remote Java SE Platform to deploy on Raspberry Pi, refer to the video in the post "Java + JavaFX + jSSC run on Raspberry Pi, control Arduino Uno")
remark: due to something wrong on my Raspberry Pi 2 cannot detect monitor correctly, I have to edit /boot/config.txt to set framebuffer_width and framebuffer_height to 500x400. So the screen output may be differency to you.
Arduino Side:
Board: Arduino Uno + 8x8 LED Matrix
Connected to Raspberry Pi 2 with USB.
Arduino Side:
Arduino code and connection between Arduino Uno and 8x8 LED Matrix, refer last post.
Java/JavaFX/jSSC code, program on Windows 10/NetBeans, run on Raspberry Pi 2:
(Basically same as last post, with moving btnExit to vBoxMatrix, such that user can exit the program in raspberry Pi UI.
package javafx_matrix;
import java.util.logging.Level;
import java.util.logging.Logger;
import javafx.application.Application;
import javafx.application.Platform;
import javafx.beans.value.ChangeListener;
import javafx.beans.value.ObservableValue;
import javafx.collections.FXCollections;
import javafx.collections.ObservableList;
import javafx.event.ActionEvent;
import javafx.geometry.Insets;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.ComboBox;
import javafx.scene.control.Label;
import javafx.scene.control.RadioButton;
import javafx.scene.layout.BorderPane;
import javafx.scene.layout.HBox;
import javafx.scene.layout.VBox;
import javafx.scene.text.Font;
import javafx.stage.Stage;
import jssc.SerialPort;
import static jssc.SerialPort.MASK_RXCHAR;
import jssc.SerialPortEvent;
import jssc.SerialPortException;
import jssc.SerialPortList;
public class JavaFX_Matrix extends Application {
final private int NUM_X = 8;
final private int NUM_Y = 8;
SerialPort arduinoPort = null;
ObservableList<String> portList;
@Override
public void start(Stage primaryStage) {
//ComboBox for port selection
detectPort();
final ComboBox comboBoxPorts = new ComboBox(portList);
comboBoxPorts.valueProperty()
.addListener(new ChangeListener<String>() {
@Override
public void changed(ObservableValue<? extends String> observable,
String oldValue, String newValue) {
System.out.println(newValue);
disconnectArduino();
connectArduino(newValue);
}
});
//
final Label label = new Label("arduino-er.blogspot.com");
label.setFont(Font.font("Arial", 24));
Button btnExit = new Button("Exit");
btnExit.setOnAction((ActionEvent event) -> {
Platform.exit();
});
VBox vBoxInfo = new VBox();
//vBoxInfo.getChildren().addAll(label, btnExit);
vBoxInfo.getChildren().add(label);
//Matrix of RadioButton
VBox vBoxMatrix = new VBox();
vBoxMatrix.setPadding(new Insets(10, 10, 10, 10));
for(int y=0; y<NUM_Y; y++){
HBox box = new HBox();
for(int x=0; x<NUM_X; x++){
MatrixButton btn = new MatrixButton(x, y);
box.getChildren().add(btn);
}
vBoxMatrix.getChildren().add(box);
}
vBoxMatrix.getChildren().add(btnExit);
vBoxMatrix.widthProperty().addListener(new ChangeListener<Number>(){
@Override
public void changed(ObservableValue<? extends Number> observable, Number oldValue, Number newValue) {
comboBoxPorts.setPrefWidth((double)newValue);
btnExit.setPrefWidth((double)newValue);
}
});
BorderPane borderPane = new BorderPane();
borderPane.setTop(comboBoxPorts);
borderPane.setCenter(vBoxMatrix);
borderPane.setBottom(vBoxInfo);
Scene scene = new Scene(borderPane, 300, 250);
primaryStage.setTitle("Arduino-er");
primaryStage.setScene(scene);
primaryStage.show();
}
public static void main(String[] args) {
launch(args);
}
@Override
public void stop() throws Exception {
disconnectArduino();
super.stop();
}
private void detectPort(){
portList = FXCollections.observableArrayList();
String[] serialPortNames = SerialPortList.getPortNames();
for(String name: serialPortNames){
System.out.println(name);
portList.add(name);
}
}
public boolean connectArduino(String port){
System.out.println("connectArduino");
boolean success = false;
SerialPort serialPort = new SerialPort(port);
try {
serialPort.openPort();
serialPort.setParams(
SerialPort.BAUDRATE_9600,
SerialPort.DATABITS_8,
SerialPort.STOPBITS_1,
SerialPort.PARITY_NONE);
serialPort.setEventsMask(MASK_RXCHAR);
serialPort.addEventListener((SerialPortEvent serialPortEvent) -> {
if(serialPortEvent.isRXCHAR()){
//receive something for debug
try {
String st = serialPort.readString(serialPortEvent
.getEventValue());
System.out.println(st);
} catch (SerialPortException ex) {
Logger.getLogger(JavaFX_Matrix.class.getName())
.log(Level.SEVERE, null, ex);
}
}
});
arduinoPort = serialPort;
//Send dummy to clear buffer
try {
Thread.sleep(2000);
} catch (InterruptedException ex) {
Logger.getLogger(JavaFX_Matrix.class.getName())
.log(Level.SEVERE, null, ex);
}
sendDotArduino(0, 0, false);
success = true;
} catch (SerialPortException ex) {
Logger.getLogger(JavaFX_Matrix.class.getName())
.log(Level.SEVERE, null, ex);
System.out.println("SerialPortException: " + ex.toString());
}
return success;
}
public void disconnectArduino(){
System.out.println("disconnectArduino()");
if(arduinoPort != null){
try {
arduinoPort.removeEventListener();
if(arduinoPort.isOpened()){
arduinoPort.closePort();
}
arduinoPort = null;
} catch (SerialPortException ex) {
Logger.getLogger(JavaFX_Matrix.class.getName())
.log(Level.SEVERE, null, ex);
}
}
}
public void sendDotArduino(int x, int y, boolean s){
final byte SYNC_WORD = (byte)0xFF;
if(arduinoPort != null){
byte[] buffer = new byte[]{
SYNC_WORD,
(byte)x,
(byte)y,
(byte)(s ? 1 : 0)
};
try {
arduinoPort.writeBytes(buffer);
} catch (SerialPortException ex) {
Logger.getLogger(JavaFX_Matrix.class.getName()).log(Level.SEVERE, null, ex);
}
}
}
class MatrixButton extends RadioButton {
public MatrixButton(int x, int y) {
setOnAction((ActionEvent event) -> {
RadioButton src = (RadioButton) event.getSource();
JavaFX_Matrix.this.sendDotArduino(x, y, src.isSelected());
});
}
}
}
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