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This commit is contained in:
Januar Chayadi
2024-11-14 14:16:39 +07:00
commit 11ef829bbf
12 changed files with 319 additions and 0 deletions
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29
.gitignore vendored Normal file
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### IntelliJ IDEA ###
out/
!**/src/main/**/out/
!**/src/test/**/out/
### Eclipse ###
.apt_generated
.classpath
.factorypath
.project
.settings
.springBeans
.sts4-cache
bin/
!**/src/main/**/bin/
!**/src/test/**/bin/
### NetBeans ###
/nbproject/private/
/nbbuild/
/dist/
/nbdist/
/.nb-gradle/
### VS Code ###
.vscode/
### Mac OS ###
.DS_Store

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# Default ignored files
/shelf/
/workspace.xml

8
.idea/artifacts/JavaInRaspi_jar.xml generated Normal file
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<component name="ArtifactManager">
<artifact type="jar" build-on-make="true" name="JavaInRaspi:jar">
<output-path>$PROJECT_DIR$/out/artifacts/JavaInRaspi_jar</output-path>
<root id="archive" name="JavaInRaspi.jar">
<element id="module-output" name="JavaInRaspi" />
</root>
</artifact>
</component>

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<?xml version="1.0" encoding="UTF-8"?>
<project version="4">
<component name="ProjectRootManager" version="2" languageLevel="JDK_21" default="true" project-jdk-name="liberica-21" project-jdk-type="JavaSDK">
<output url="file://$PROJECT_DIR$/out" />
</component>
</project>

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.idea/modules.xml generated Normal file
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<?xml version="1.0" encoding="UTF-8"?>
<project version="4">
<component name="ProjectModuleManager">
<modules>
<module fileurl="file://$PROJECT_DIR$/JavaInRaspi.iml" filepath="$PROJECT_DIR$/JavaInRaspi.iml" />
</modules>
</component>
</project>

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<?xml version="1.0" encoding="UTF-8"?>
<project version="4">
<component name="VcsDirectoryMappings">
<mapping directory="$PROJECT_DIR$" vcs="Git" />
</component>
</project>

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JavaInRaspi.iml Normal file
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<?xml version="1.0" encoding="UTF-8"?>
<module type="JAVA_MODULE" version="4">
<component name="NewModuleRootManager" inherit-compiler-output="true">
<exclude-output />
<content url="file://$MODULE_DIR$">
<sourceFolder url="file://$MODULE_DIR$/src" isTestSource="false" />
</content>
<orderEntry type="inheritedJdk" />
<orderEntry type="sourceFolder" forTests="false" />
</component>
</module>

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src/DigitalInput.java Normal file
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import java.io.IOException;
public class DigitalInput {
private int pinnya=0;
private boolean currentIsON = false;
private boolean initialized = false;
/**
* Buat di JAVA coding
* @param pin_number : pin
*/
public DigitalInput(int pin_number) {
// if (jGPIO.osname=="") jGPIO.detectOS();
pinnya = pin_number;
if (Setup_Pin()) initialized = true;
}
private boolean Setup_Pin() {
if (!GeneralCode.GpioIsExported(pinnya)) {
// belum ada, coba export dulu
if (!GeneralCode.ExportGpio(pinnya)) {
// gagal export
return false;
}
}
// sampe sini, harusnya ada
// harus set output dulu
if (GeneralCode.SetGpioDirection(pinnya, true)) {
// pasang value 1
if (GeneralCode.SetGpioValue(pinnya, true)) {
// ubah jadi input
if (GeneralCode.SetGpioDirection(pinnya, false)) {
System.out.println("DigitalInput Setup_Pin success !!");
return true;
} else System.out.println("Gagal SetDirection ke Input untuk DigitalInput pin "+pinnya);
} else System.out.println("Gagal SetValue ke high untuk DigitalInput pin "+pinnya);
} else System.out.println("Gagal SetDirection ke Output untuk DigitalInput pin "+pinnya);
return false;
}
public boolean getIsInitialized(){
return initialized;
}
/**
* Read State of GPIO
* @return 0 = Low, 1 = high, -1 = failed reading
*/
public int ReadState() {
int value = GeneralCode.GetGpioValue(pinnya);
if (value==0) {
currentIsON = false;
} else if (value==1) {
currentIsON = true;
}
return value;
}
/*
* Get last ReadState value
* return true if High 1
* return false if Low 0
*/
public boolean getIsON(){
return currentIsON;
}
/*
* Release control of Digital Output (not controlling anymore)
* return true if success operation
*/
public void Release() {
GeneralCode.UnExportGpio(pinnya);
}
}

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public class DigitalOutput {
int pin;
DigitalOutput(int pinOut) {
pin = pinOut;
}
private boolean Setup_Pin() {
if (!GeneralCode.GpioIsExported(pin)) {
// belum ada, coba export dulu
if (!GeneralCode.ExportGpio(pin)) {
// gagal export
return false;
}
}
// sampe sini, harusnya ada
// harus set output dulu
if (GeneralCode.SetGpioDirection(pin, true)) {
// pasang value 1
if (GeneralCode.SetGpioValue(pin, true)) {
// ubah jadi input
if (GeneralCode.SetGpioDirection(pin, false)) {
System.out.println("DigitalInput Setup_Pin success !!");
return true;
} else System.out.println("Gagal SetDirection ke Input untuk DigitalInput pin "+pin);
} else System.out.println("Gagal SetValue ke high untuk DigitalInput pin "+pin);
} else System.out.println("Gagal SetDirection ke Output untuk DigitalInput pin "+pin);
return false;
}
}

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src/GeneralCode.java Normal file
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import java.io.*;
import java.util.Objects;
public class GeneralCode {
private static final String GPIO_PATH = "/sys/class/gpio/";
/**
check is the OS is Linux or not
*/
public static boolean OsIsLinux(){
boolean result = false;
String OsResult = System.getProperty("os.name").toLowerCase();
if (OsResult.contains("linux")) {
result = true;
}
return result;
}
/**
* checking if pin is already exported in /sys/class/gpio
* @param Pin --> pin that you want to check
* @return true if pin exported
*/
public static boolean GpioIsExported(int Pin){
String fileName = "/sys/class/gpio/gpio"+Pin;
File file = new File(fileName);
return file.exists();
}
/**
* Export file, is a must before set In or Out.
* @param Pin that you want to set
* @return true if success
*/
public static boolean ExportGpio(int Pin){
return writeToFile(GPIO_PATH + "export", String.valueOf(Pin));
}
public static boolean UnExportGpio(int Pin){
return writeToFile(GPIO_PATH+"unexport",String.valueOf(Pin));
}
/**
*
* @param Pin pin that you want to set
* @param direction true if In, false if Out
* @return True if success
*/
public static boolean SetGpioDirection(int Pin, boolean direction){
String val;
if(direction){
val = "out";
}else {val="in";}
return writeToFile(GPIO_PATH+"gpio"+Pin+"/direction",val);
}
/**
* Set value to file,
* @param Pin pin that you want to set value
* @param Value if true-> HIGH false-> LOW
* @return true if success
*/
public static boolean SetGpioValue(int Pin,boolean Value){
String valNum = "";
if (Value){
valNum="1";
}else {valNum="0";}
return writeToFile(GPIO_PATH + "gpio" + Pin + "/value", valNum);
}
/**
* Get value from file
* @param Pin that you want to get value
* @return 1/0
*/
public static int GetGpioValue(int Pin){
String filePath = GPIO_PATH+"gpio"+Pin+"/value";
return Integer.parseInt(Objects.requireNonNull(readFromFile(filePath)));
}
// Helper method to write to a file
private static boolean writeToFile(String filePath, String value) {
System.out.println("writing value : "+filePath+" " + value);
boolean result = false;
try (BufferedWriter writer = new BufferedWriter(new FileWriter(filePath))) {
writer.write(value);
result = true;
} catch (IOException e) {
System.err.println("Error writing to " + filePath + ": " + e.getMessage());
}
return result;
}
// Helper method to read from a file (if needed)
private static String readFromFile(String filePath) {
try (BufferedReader reader = new BufferedReader(new FileReader(filePath))) {
return reader.readLine();
} catch (IOException e) {
System.err.println("Error reading from " + filePath + ": " + e.getMessage());
return null;
}
}
}

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src/META-INF/MANIFEST.MF Normal file
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Manifest-Version: 1.0
Main-Class: Main

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src/Main.java Normal file
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import java.util.Timer;
import java.util.TimerTask;
public class Main {
public static void main(String[] args) {
DigitalInput talkButton = new DigitalInput(12);
System.out.println("is initialized :"+ talkButton.getIsInitialized());
Runtime.getRuntime().addShutdownHook(new Thread(()->{
talkButton.Release();
System.out.println("program is closed!");
}));
System.out.println("Test Program GPIO di linux");
Timer testTimer = new Timer();
testTimer.schedule(new TimerTask() {
@Override
public void run() {
System.out.println(talkButton.ReadState());
}
},0,1000);
}
}