B4J Question Pi4J (add orange PI).

[alexhi]

Hi Erel !

I've found this link to a library Pi4J (add orange PI).
https://github.com/Pi4J/pi4j/tree/master/pi4j-example/src/main/java
Is it possible to wrap it ?

 

[Erel]

Have you tried to use the existing library with orange Pi? Which error did you get?

 

[alexhi]

Yes, and I see this error :
Unable to determine hardware version. I see: Hardware : sun8i
,
- expecting BCM2708 or BCM2709. Please report this to [email protected]

 

[Erel]

I'll update the library.

 

[alexhi]

Thanks, I'll wait

 

[Erel]

The new version was released. Please try it: https://www.b4x.com/android/forum/threads/iot-jpi4j-raspberry-pi-gpio-controller.37493

 

[alexhi]

Hi Erel! I test this lib v2.0 on orangepi One and see error:

Unable to determine hardware version. I see: Hardware : sun8i
,
- expecting BCM2708 or BCM2709.
If this is a genuine Raspberry Pi then please report this
to [email protected]. If this is not a Raspberry Pi then you
are on your own as wiringPi is designed to support the
Raspberry Pi ONLY.

This lib work only Raspberry?

 

[Erel]

Orange Pi is not supported by Pi4J. The list of supported hardware is available here: http://pi4j.com/
I confused it with Banana Pi which is supported.

Download Pi4J v1.2-snapshot: http://pi4j.com/download.html

Unzip it and copy pi4j-core.jar, pi4j-device.jar and pi4j-gpio-extension.jar to the additional libraries folder.

Run it. If it fails try with this code:

Dim provider As JavaObject
provider.InitializeNewInstance("com.pi4j.io.gpio.OrangePiGpioProvider", Null)
Dim jo as JavaObject
jo.InitializeStatic("com.pi4j.io.gpio.GpioFactory").RunMethod("setDefaultProvider", provider)
'above code should be before the controller is initialized.
controller.Initialize

 

[alexhi]

I try its and see error:


main._appstart (java line: 52)
java.lang.ClassCastException: com.pi4j.io.gpirangePiGpioProvider cannot be cast to [Ljava.lang.Object;
at b4j.example.main._appstart(main.java:52)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)
at anywheresoftware.b4a.BA.raiseEvent2(BA.java:90)
at anywheresoftware.b4a.BA.raiseEvent(BA.java:77)
at b4j.example.main.main(main.java:29)

 

[Erel]

You should run it in debug mode to be able to see the error line.

The correct code should be:

jo.InitializeStatic("com.pi4j.io.gpio.GpioFactory").RunMethod("setDefaultProvider", Array(provider))

 

[alexhi]

I do
jo.InitializeStatic("com.pi4j.io.gpio.GpioFactory").RunMethod("setDefaultProvider", Array(provider))

in Debug mode
Waiting for debugger to connect...
Program started.
Error occurred on line: 24

Pin8.Initialize(10, True) 'GpioPinDigitalOutput

and see err:


main._appstart (java line: 56)
com.pi4j.io.gpio.exception.PinProviderException: GPIO pin [GPIO 10] expects provider [RaspberryPi GPIO Provider] but is attempting to be provisioned with provider [OrangePi GPIO Provider]; provisioning failed.
at com.pi4j.io.gpio.impl.GpioControllerImpl.provisionPin(GpioControllerImpl.java:546)
at com.pi4j.io.gpio.impl.GpioControllerImpl.provisionDigitalOutputPin(GpioControllerImpl.java:717)
at com.pi4j.io.gpio.impl.GpioControllerImpl.provisionDigitalOutputPin(GpioControllerImpl.java:711)
at com.pi4j.io.gpio.impl.GpioControllerImpl.provisionDigitalOutputPin(GpioControllerImpl.java:734)
at anywheresoftware.b4j.objects.GpioControllerWrapper$GpioPinDigitalOutputWrapper.Initialize(GpioControllerWrapper.java:116)
at b4j.example.main._appstart(main.java:56)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflec
t.Method.invoke(Method.java:497)
at anywheresoftware.b4a.BA.raiseEvent2(BA.java:90)
at anywheresoftware.b4a.BA.raiseEvent(BA.java:77)
at b4j.example.main.main(main.java:29)

 

[derez]

A very partial solution for GPIO in Orangpi (only for writing data to pins) : https://www.b4x.com/android/forum/threads/iot-traffic-light-with-raspberry-pi.57889/#post-389336

 

[alexhi]

Thanks derez, I tried this , but is partial solution

 

[wirog80]

same result(error) with me
but i have tried this code with java using pi4j 1.2, and successful.

import com.pi4j.io.gpio.*;
import com.pi4j.platform.Platform;
import com.pi4j.platform.PlatformAlreadyAssignedException;
import com.pi4j.platform.PlatformManager;

public class Mainclass {

    public static void main(String[] args) throws InterruptedException, PlatformAlreadyAssignedException {

        System.out.println("Starting Demo");
        PlatformManager.setPlatform(Platform.ORANGEPI); // Support for Orange Pi

        final GpioController gpio = GpioFactory.getInstance();

        GpioPinDigitalInput inputPin = gpio.provisionDigitalInputPin(OrangePiPin.GPIO_00,PinPullResistance.PULL_UP);// Pulled UP
        GpioPinDigitalOutput outputPin = gpio.provisionDigitalOutputPin(OrangePiPin.GPIO_07);
        while(true){
        if(inputPin.isLow()){// Checks if switch is pressed.

            System.out.println("Switch is pressed.");
            outputPin.low();
        }
        else{
            outputPin.high();
        }
        }
       // gpio.shutdown();
    }
}

for OrangePi just add this syntax:
PlatformManager.setPlatform(Platform.ORANGEPI);
how to wrap a syntax in B4J?

a .jar output copying with pi4j-core library
i copy test1.jar and test1_lib folder with contain pi4j-core.jar to the board

i don't understand about Java, just copy-paste from this link
http://weargenius.in/orange-pi-zero-gpio-programming-using-java/
and from this video:

 

[Erel]

You can call it with this code:

Dim platform As JavaObject
platform.InitializeStatic("com.pi4j.platform.PlatformManager").RunMethod("setPlatform", Array("ORANGEPI"))

You will need to update the additional jars with Pi4J 1.2 jars.

 

[wirog80]

thanks Erel.
i have tried it.
same error code

Error occurred on line: 19
com.pi4j.io.gpio.exception.PinProviderException: GPIO pin [GPIO 0] expects provider [RaspberryPi GPIO Provider]...

line 19 >> pinI1.Initialize("pinI1",0 )

this is my code:

Sub Process_Globals

    Private gpio As GpioController
    Private pinI1 As GpioPinDigitalInput
    Private pinO2 As GpioPinDigitalOutput
End Sub

Sub AppStart (Args() As String)
    Dim platform As JavaObject
    platform.InitializeStatic("com.pi4j.platform.PlatformManager").RunMethod("setPlatform", Array("ORANGEPI"))
  
    gpio.Initialize
    pinI1.Initialize("pinI1",0 )
    pinI1.SetPinPullResistance("PULL_UP")
    pinO2.Initialize(7,True)
    StartMessageLoop
End Sub

Sub pinI1_StateChange(State As Boolean)

End Sub

 

[wirog80]

sorry Erel, want to ask again
your syntax

Dim provider As JavaObject
provider.InitializeNewInstance("com.pi4j.io.gpio.OrangePiGpioProvider", Null)
Dim jo as JavaObject
jo.InitializeStatic("com.pi4j.io.gpio.GpioFactory").RunMethod("setDefaultProvider", provider)

is wrap from this ?
GpioFactory.setDefaultProvider(new OrangePiGpioProvider());

 

[Erel]

is wrap from this ?
GpioFactory.setDefaultProvider(new OrangePiGpioProvider());

Yes. It calls this exact API.

 

[wirog80]

still confusing, why pi4J can running in OrangePI with Java.
but still not success with a wrapper (B4J)
have you tried it with OrangePI board?

 

[Erel]

have you tried it with OrangePI board?

No.