What is NTC C.H.I.P. Java GPIO Library?

Library which helps to communicate with CHIP GPIO using Java language.

How add into your project (maven)?

Clone project and install in local repository.

git clone https://github.com/DenisLAD/JavaGPIOLib.git
cd GPIOChipLib
mvn install

Add maven dependency into your project.

<dependencies>
  ...
  <dependency>
    <groupId>free.lucifer</groupId>
    <artifactId>chiplib</artifactId>
    <version>0.1.2</version>
  </dependency>
  ...
</dependencies>

How use it?

Just read data.

    Chip.I.open(); // Prepare low level access
    Chip.Pin pin1 = Chip.Pin.XIO_P7;
    Chip.I.pinMode(pin1, Chip.Pin.PinMode.INPUT); // Setup pin mode
    while (true) {
        System.out.println(Chip.I.digiatalRead(pin1));
    }

Read DHT11 sensor

    Chip.I.open(); // Prepare low level access
    DHT11 dht = new DHT11(Chip.Pin.CSID0); // Use CSID0 pin
    Chip.I.addTask(dht); // Add task to interval update
    while(dht.getStatus() != DHT11.Status.OK) { // Repeat while status in not OK
        LockSupport.parkNanos(TimeUnit.SECONDS.toNanos(1)); // Wait 1 second
    }
    
    System.out.println("Temperature: " + dht.getTemperature());
    System.out.println("Humidity: " + dht.getHumidity());

...

Limitation

If you want to use all of CHIP pins, you should run your project thru sudo or add your user to super user group. ...

Some info

Library uses JNA to access to native IO libraries. Also library uses direct access to memory instead of file system access (which may improve the speed).

Tasks

• SPI
• DHT11 (temperature sensor)
• I2C
• SSD1306 (LCD)
• nRF24L01+ (network)
• A4988 (stepper driver)
• Soft PWM at high speed