B4J Question UP-BOARD

micro · May 1, 2017

Hi
Someone used this board?
This board is similar (as dimension and GPIO) to the raspberry but with Intel atom Cpu
and also can install windows OS.
The JPIO and JP4J can work on this board?
This board is more powerful.
https://up-community.org/wiki/GPIO
https://up-community.org/wiki/Software
http://up-shop.org/4-up-boards

Erel · May 1, 2017

micro said:
The JPIO and JP4J can work on this board?

No.

You can probably use jShell to control the pins.

micro · May 4, 2017

Erel said:
You can probably use jShell to control the pins.

I hope it's simple
The board comes in few days, but I know it will not be easy for me.
This is a link where show a example in javascript but as invokes the mraa library with B4J?
https://up-community.org/wiki/MRAA/UPM
https://iotdk.intel.com/docs/master/mraa/up.html

javascript example

B4X:

var m = require('mraa'); //require mraa
console.log('MRAA Version: ' + m.getVersion()); //write the mraa version to the console

var myLed = new m.Gpio(7); //LED hooked up to digital pin 7
myLed.dir(m.DIR_OUT); //set the gpio direction to output
var ledState = true; //Boolean to hold the state of Led

function periodicActivity()
{
  myLed.write(ledState?1:0); //if ledState is true then write a '1' (high) otherwise write a '0' (low)
  ledState = !ledState; //invert the ledState
  setTimeout(periodicActivity,500); //call the indicated function after 1 second (1000 milliseconds)
}

periodicActivity(); //call the periodicActivity function

Erel · May 5, 2017

A wrapper for MRAA library is available: https://www.b4x.com/android/forum/threads/iot-jmraa-intel-edison.60665/#content
I'm not sure whether it will work with this device or not.

In Raspberry Pi there is a command line tool named gpio: http://wiringpi.com/the-gpio-utility/

You need to check whether there is a similar tool for this device.

micro · May 10, 2017

Ok, the board has arrived.
I started with some tests using the jmraa library but in mraa.Initialize
I have these errors:

B4X:

Waiting for debugger to connect...
Program started.
java.lang.UnsatisfiedLinkError: C:\Users\User\Downloads\tempjars\libmraajava.so: Can't load this .dll (machine code=0x101) on a AMD 64-bit platform
    at java.lang.ClassLoader$NativeLibrary.load(Native Method)
    at java.lang.ClassLoader.loadLibrary0(Unknown Source)
    at java.lang.ClassLoader.loadLibrary(Unknown Source)
    at java.lang.Runtime.load0(Unknown Source)
    at java.lang.System.load(Unknown Source)
    at anywheresoftware.b4j.objects.MraaController.Initialize(MraaController.java:44)
    at b4j.example.main._appstart(main.java:85)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at anywheresoftware.b4a.shell.Shell.runMethod(Shell.java:612)
    at anywheresoftware.b4a.shell.Shell.raiseEventImpl(Shell.java:229)
    at anywheresoftware.b4a.shell.Shell.raiseEvent(Shell.java:159)
    at sun.reflect.NativeMethodAccesso
rImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at anywheresoftware.b4a.BA.raiseEvent2(BA.java:79)
    at anywheresoftware.b4a.ShellBA.raiseEvent2(ShellBA.java:92)
    at anywheresoftware.b4a.BA.raiseEvent(BA.java:70)
    at b4j.example.main.start(main.java:38)
    at com.sun.javafx.application.LauncherImpl.lambda$launchApplication1$162(LauncherImpl.java:863)
    at com.sun.javafx.application.PlatformImpl.lambda$runAndWait$175(PlatformImpl.java:326)
    at com.sun.javafx.application.PlatformImpl.lambda$null$173(PlatformImpl.java:295)
    at java.security.AccessController.doPrivileged(Native Method)
    at com.sun.javafx.application.PlatformImpl.lambda$runLater$174(PlatformImpl.java:294)
    at com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:95)
    at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
    at com.sun.glass.ui.w
in.WinApplication.lambda$null$148(WinApplication.java:191)
    at java.lang.Thread.run(Unknown Source)
java.lang.RuntimeException: java.lang.UnsatisfiedLinkError: C:\Users\User\Downloads\tempjars\libmraajava.so: Can't load this .dll (machine code=0x101) on a AMD 64-bit platform
    at anywheresoftware.b4a.BA.raiseEvent2(BA.java:108)
    at anywheresoftware.b4a.ShellBA.raiseEvent2(ShellBA.java:92)
    at anywheresoftware.b4a.BA.raiseEvent(BA.java:70)
    at b4j.example.main.start(main.java:38)
    at com.sun.javafx.application.LauncherImpl.lambda$launchApplication1$162(LauncherImpl.java:863)
    at com.sun.javafx.application.PlatformImpl.lambda$runAndWait$175(PlatformImpl.java:326)
    at com.sun.javafx.application.PlatformImpl.lambda$null$173(PlatformImpl.java:295)
    at java.security.AccessController.doPrivileged(Native Method)
    at com.sun.javafx.application.PlatformImpl.lambda$runLater$174(PlatformImpl.java:294)
    at com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:95)
    at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
    at com.sun.glass.ui.win.WinApplication.lambda$null$148(WinAp
plication.java:191)
    at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.UnsatisfiedLinkError: C:\Users\User\Downloads\tempjars\libmraajava.so: Can't load this .dll (machine code=0x101) on a AMD 64-bit platform
    at java.lang.ClassLoader$NativeLibrary.load(Native Method)
    at java.lang.ClassLoader.loadLibrary0(Unknown Source)
    at java.lang.ClassLoader.loadLibrary(Unknown Source)
    at java.lang.Runtime.load0(Unknown Source)
    at java.lang.System.load(Unknown Source)
    at anywheresoftware.b4j.objects.MraaController.Initialize(MraaController.java:44)
    at b4j.example.main._appstart(main.java:85)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at anywheresoftware.b4a.shell.Shell.runMethod(Shell.java:612)
    at anywheresoftware.b4a.shell.Shell.raiseEventImpl(Shell.java:229)
    at anywheresoftware.b4a.s
hell.Shell.raiseEvent(Shell.java:159)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at anywheresoftware.b4a.BA.raiseEvent2(BA.java:79)
    ... 12 more

micro · May 10, 2017

Attached a file for test I/O downloaded from up-board site

Erel · May 11, 2017

jMRAA will not work with your board.

micro · May 11, 2017

Is possibile use a Windows DLL or python script?
On Up-board site ther's a library RPI.GPIO for this board but for Linux.

Erel · May 11, 2017

You cannot use a Windows DLL.

Python: https://www.b4x.com/android/forum/threads/rpi-piface-control-and-display-cad.62610/#content...

micro · May 12, 2017

Erel said:
jMRAA will not work with your board.

On this link https://iotdk.intel.com/docs/master/mraa/index.html
reports the various boards supported by mraa:

If you have wrapped mraa lib for the board intel edison why it does not work with up-board?
I think the problem can only be the matching of the pins but at least it must work
I'm wrong?
Thanks for all.

Erel · May 12, 2017

jMRAA was compiled with native libraries on the Intel Edison. Different native libraries will be required for other platforms.

micro · May 12, 2017

Erel said:
Different native libraries will be required for other platforms.

Ok Erel but I've never compiled a library.
On this link

UP Board

there are the various libraries for mraa, are you able to compile it?
Thanks again

micro · May 12, 2017

This link attached is DIO project in C# and use aaeonEAPI.dll and EAPI.cs class.
In Form1.cs you see the calls to the aaeonEAPI.dll and the variuos dll entrypoint.
It seems simple if the program was in C# but with B4j i can not make it.

Some help if you have time to devote?
Thanks

Erel · May 14, 2017

The C# libraries will not help. It is also not simple to compile the MRAA library. It should be done on the board itself and it requires a very specific configuration.

I recommend you to go with the python approach. It shouldn't be too difficult.

micro · May 14, 2017

Erel said:
I recommend you to go with the python approach. It shouldn't be too difficult

I need install python on windows but RPI.GPIO or WIRING PY how i install it on windows?
Around I see only installations under linux.

Thanks so much for the support.

Erel · May 14, 2017

I'm sorry but I never installed it on Windows.

micro · May 19, 2017

I'm back Erel,
forgive me but I want to see to use the UP-BOARD to the best.
I found this new file with the mraa.jar and various upm*.jar, can you see how to use them with b4j?
Thanks

file

micro · May 20, 2017

Hi Erel
I tried to decompile the mraa.jar file of the previous link and your and are identical, but in your mraa.jar there is libmraajava.so file, what is it for?
Is this that show the error when initialize your jmraa library, but i can not see what's inside in this file (libmraajava.so).
Thanks

P.S.
I looked better, they are not exactly the same

micro · May 20, 2017

The libmraajava.so is refers to linux folders paths.
So I think the problem is not the up-board but the operating system, on my board run windows 10.
It's correct?

Erel · May 21, 2017

The .so file is the native library. The B4J library copies it at runtime to File.DirApp and loads it. This step should work on both Windows and Linux. It is possible that the native library itself needs to be recompiled.

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