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Kura + External jar (ex :- Pi4j) problem [message #1496733]

Wed, 03 December 2014 03:19

Eclipse User

I tried a simple kura example with pi4j jars and I am facing this problem.
The bundle installs and runs only once , if you stop and rerun it doesn't run, even if you uninstall the bundle and install again also it doesn't even start. However if you reboot pi and install the bundle it runs only once and same problem repeats...

here's the code

import org.osgi.service.component.ComponentContext;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.pi4j.io.gpio.GpioController;
import com.pi4j.io.gpio.GpioFactory;
import com.pi4j.io.gpio.GpioPinDigitalOutput;
import com.pi4j.io.gpio.RaspiPin;

public class HelloOsgi {

private static final Logger s_logger = LoggerFactory.getLogger(HelloOsgi.class);

private static final String APP_ID = "org.eclipse.kura.example.hello_osgi";

protected void activate(){
GpioController gpio = GpioFactory.getInstance();
GpioPinDigitalOutput led1 = gpio.provisionDigitalOutputPin(RaspiPin.GPIO_01);
s_logger.info("Bundle " + APP_ID + " has started!");
led1.high();
s_logger.debug(APP_ID + ": This is a debug message.");
/* for (;;) {
try {
Thread.sleep(500);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}*/
}

protected void deactivate() {

s_logger.info("Bundle " + APP_ID + " has stopped!");
led1.low();
gpio.shutdown();

}
}

any solution???

Thanks in advance

Re: Kura + External jar (ex :- Pi4j) problem [message #1498518 is a reply to message #1496733]

Thu, 04 December 2014 08:15

Eclipse User

Hello Srinivas,
the issue you are facing could be related to JNI support in Equinox.
Do you have some kind of errors on the kura.log log file, or even in kura-console.log?

Anyway, starting from Kura 1.1.0, we will include OpenJDK Device I/O, so GPIO support will be included directly in the kura build. No more need of Pi4J.

If you wish you can test it on the current snapshot, taking the following steps:

- download the latest kura snapshot
- build the target platform using the "dio" profile (mvn -Pdio clean install inside kura/target_platform)
- include jdk.dio in the manifest dependencies
and edit your bundle as follows:

import org.osgi.service.component.ComponentContext;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import jdk.dio.DeviceManager;
import jdk.dio.DeviceNotFoundException;
import jdk.dio.UnavailableDeviceException;
import jdk.dio.gpio.GPIOPin;

public class HelloOsgi {

private static final Logger s_logger = LoggerFactory.getLogger(HelloOsgi.class);

private static final String APP_ID = "org.eclipse.kura.example.hello_osgi";


protected void activate(){
 
  s_logger.info("Bundle " + APP_ID + " is starting...");
  GPIOPin led1;
  try {
      // 17 indicates GPIO_GEN_0 on Raspberry P B+
      led1 = DeviceManager.open(17);

      led1.setValue(true);
    } catch (DeviceNotFoundException e) {
      // TODO Auto-generated catch block
      e.printStackTrace();
    } catch (UnavailableDeviceException e) {
      // TODO Auto-generated catch block
      e.printStackTrace();
    } catch (IOException e) {
      // TODO Auto-generated catch block
      e.printStackTrace();
  }
  s_logger.info("Bundle " + APP_ID + " has started!");
}

protected void deactivate() {
  led1.setValue(false);
  led1.close();
  s_logger.info("Bundle " + APP_ID + " has stopped!");
}
}

Further references on Device I/O can be found on the Kura Documentation.

Re: Kura + External jar (ex :- Pi4j) problem [message #1505599 is a reply to message #1496733]

Wed, 10 December 2014 01:52

Eclipse User

Thank you Luca..
I have one more problem . I am using a serial communication between arduino and Rasberry pi using Kura and external library RXTXj.jar ... every thing works fine on first deployment of package .. the bundle stops , starts etc... But once you uninstall the bundle and Re-Install it shows active but doesnt work... any solution?

Thanks in advance.

Re: Kura + External jar (ex :- Pi4j) problem [message #1505604 is a reply to message #1498518]

Wed, 10 December 2014 01:57

Eclipse User

Re: Kura + External jar (ex :- Pi4j) problem [message #1506120 is a reply to message #1505604]

Wed, 10 December 2014 10:48

Eclipse User

Srinivas, can you provide the console-log file?
If there is some issue with native libraries, then we should find some related entry there.

Moreover... why are you using RXTX?
Kura ships with Soda DK Comm. In other words: no need of external serial libraries.
You can just use the CommConnectionFactory declarative service, or you can import org.eclipse.soda.dk.comm into the manifest file, and then directly use SerialPort objects.

In order to understand how the CommConnectionFactory works, you can have a look at the example.serial.publisher module.

Let me know,
Luca

Re: Kura + External jar (ex :- Pi4j) problem [message #1703797 is a reply to message #1506120]

Wed, 05 August 2015 01:50

Eclipse User

Hello Luca,

I tried to compile org.eclipse.kura.example.serial.publisher for my Raspberry but I get error:

\org.eclipse.kura.example.serial.publisher\src\main\java\org\eclipse\kura\example\serial\publisher\ExampleSerialPublisher.java (at line 297)
m_commConnection = (CommConnection) m_connectionFactory.createConnection(uri, 1, false);
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
The type javax.microedition.io.Connection cannot be resolved. It is indirectly referenced from required .class files

I had problem with jdk.dio.uart also. Uart works in Pi4j but after including this lib to bundle it doesn't work.

Any solution for using uart in Kura???

Thanks in advance

P.S. using kura : kura_downloads/raspbian/release/1.2.0/kura_1.2.0_raspberry-pi-2_armv7.deb

Re: Kura + External jar (ex :- Pi4j) problem [message #1704939 is a reply to message #1703797]

Mon, 10 August 2015 20:42

Eclipse User

Hello,

For the serial connection, please be sure to follow this example [1] very closely. In particular pay close attention to the build.properties file.

If you need help with the UART problem, please post the errors from your kura.log and kura-console.log files.

[1] http://eclipse.github.io/kura/doc/serial-example.html

Thanks,
--Dave

Re: Kura + External jar (ex :- Pi4j) problem [message #1705089 is a reply to message #1704939]

Wed, 12 August 2015 00:35

Eclipse User

Hello David,
I have compilation error in this case ( eclipse.github.io/kura/doc/serial-example.html ):

\org.eclipse.kura.example.serial.publisher\src\main\java\org\eclipse\kura\example\serial\publisher\ExampleSerialPublisher.java (at line 297)
m_commConnection = (CommConnection) m_connectionFactory.createConnection(uri, 1, false);
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
The type javax.microedition.io.Connection cannot be resolved. It is indirectly referenced from required .class files

Thanks in advance

Re: Kura + External jar (ex :- Pi4j) problem [message #1706679 is a reply to message #1705089]

Fri, 28 August 2015 11:17

Eclipse User

Hello,

I don't know if you still need support for this. If so, please post the content of your projects build.properties file.

Thanks,
--Dave

Re: Kura + External jar (ex :- Pi4j) problem [message #1707086 is a reply to message #1705089]

Wed, 02 September 2015 04:09

Eclipse User

Serhiy Povoroznyuk wrote on Wed, 12 August 2015 06:35

I have compilation error in this case ( eclipse.github.io/kura/doc/serial-example.html ):

\org.eclipse.kura.example.serial.publisher\src\main\java\org\eclipse\kura\example\serial\publisher\ExampleSerialPublisher.java (at line 297)
m_commConnection = (CommConnection) m_connectionFactory.createConnection(uri, 1, false);
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
The type javax.microedition.io.Connection cannot be resolved. It is indirectly referenced from required .class files

Just a shot in the dark: this could be a conflict between Eclipse and Maven.
If the project is open in Eclipse IDE, it is compiled on-the-fly. Maven is not rebuilding those files and the Maven compiler has some issues with Eclipse-compiled class files. Disable the "Automatic build" feature of Eclipse, clean the project with mvn clean and try to compile again.

Re: Kura + External jar (ex :- Pi4j) problem [message #1720647 is a reply to message #1707086]

Wed, 20 January 2016 02:50

Eclipse User

Hi,

I know this topic is really old but I faced same problem today and I found the solution. I wanted to write the solution here for someone who may need.
Actually it was written in the example [1], when you try to export your bundle;
Quote:

Under Options, select the checkbox Use class files compiled in the workspace in addition to the checkboxes already enabled, and click Finish.

[1] = http://eclipse.github.io/kura/doc/serial-example.html

Re: Kura + External jar (ex :- Pi4j) problem [message #1792464 is a reply to message #1498518]

Wed, 18 July 2018 06:07

Eclipse User

Hello
I haved include jdk.dio in the manifest dependencie.
I want to used i2c bus.
but i got this error java.lang.NoClassDefFoundError: Could not initialize class jdk.dio.DeviceManager

this is my code

GPIOPinConfig pinConfig = new GPIOPinConfig(
				DeviceConfig.DEFAULT, 						//GPIO Controller number or name
				17, 												//GPIO Pin number
				GPIOPinConfig.DIR_INPUT_ONLY,				//Pin direction
				GPIOPinConfig.MODE_INPUT_PULL_DOWN, 	//Pin resistor
				GPIOPinConfig.TRIGGER_BOTH_EDGES, 		//Triggers
				false 											//initial value (for outputs)
			);

		pin=  DeviceManager.open(GPIOPin.class, pinConfig);

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