Looking for Windows x64 ressources

[PBuro.1]

Hello,

I'm trying to use the ST25 java SDK. The software_guide pdf document says I need to load in my IDE the natives libraries the SDK will need. It says I will find them in t \readers\st\resources, but in this folders there is only windows/x86 for the DLLs, and no windows/x64 as is mentionned in the document. And I can't use the 32bits version in my 64bits JVM. Am I missing something, or did the x64 folder was forgotten in the release ?

Extract from the pdf guide :

the readers/st/resources/windows folder from the sdk :

[Damien G.]

Hello,

Thank you for reporting this error. There should indeed be a windows/x64 folder in the release package.

Note that amongst the ST reference readers, only the CR95HF board is supported in 64-bit configuration as of today. For other readers, such as ST25R3911B/16, etc., you will need a 32-bit JVM.

Please find attached the 64-bit dll files for Windows and the CR95HF board.

This folder will be added in ST25SDK release 1.10.3.

Best regards,

Damien

[PBuro.1]

Thank you very much. Would you also be able to tell me why, now that I have loaded the right folder in my project, when I tried to instantiate a Reader with

STReader reader = new STReader();

I get the error

Exception in thread "main" java.lang.UnsatisfiedLinkError: no streader in java.library.path: C:\Projets\JavaTest\TestSDK\ressources\windows\x64

It used to say "hidapi" instead of "streader" before I found out I needed to add the resources folder

[Damien G.]

Make sure you indicate the path to the reader library in your application's Java Build Path as shown below:

 

As a reminder, the dll path should be indicated in the Source tab of the Java Build Path

[PBuro.1]

I am using Intellij Idea, and not Eclipse, but I believe I set up both the dll folder and the jar folder right, but I still got that same error.

The lib folder contains :
And the resources\windows\x64 contains the folder you sent earlier

[PBuro.1]

Could it be because I don't have an actual reader plugged in ? I don't have access to one right now

[PBuro.1]

I just noticed there is a streader.dll in the x86 folder, but not in the x64 folder. But of course I can't use it since it is for 32 bits plateform...

[Damien G.]

The 64-bit version of streader is indeed missing :sad_but_relieved_face: And I don't have it ready on my hands. :tired_face:

Do you plan to work with a CR95HF board? This is your only option for 64-bit application as of today.

[PBuro.1]

Well, I don't yet know what board I will have, I only wanted my options covered. I'll start with a 32bits JVM for now, and come back for the file if I need it.

Thank you for for your time !

[Damien G.]

You're welcome.

Starting on 32-bit version is your safest best today. We would like to have 64-bit JVM supported one day but no date has been set in stone. Check the ST25 SDK page for updates!

[PBuro.1]

So I come back here with yet another problem.

I managed to find and install a 32bit JDK (not that easy I'll add, because Oracle website doesn't propose a 32bits version of the last version. Working on 32bits will add a lot of trouble to my project, since I planned on using Jpype to create a Python wrapper of your SDK, and I will have to use a 32bits Python to do that.

But for now, I am just testing things out on a test Java project, and I still can't get it to work. I still get an "UnsatisfiedLinkError" :

Exception in thread "main" java.lang.UnsatisfiedLinkError: C:\Projets\JavaTest32bits\sdk32bits\resources\windows\x86\streader.dll: Can't find dependent libraries
	at java.lang.ClassLoader$NativeLibrary.load(Native Method)
	at java.lang.ClassLoader.loadLibrary0(ClassLoader.java:1941)
	at java.lang.ClassLoader.loadLibrary(ClassLoader.java:1857)
	at java.lang.Runtime.loadLibrary0(Runtime.java:870)
	at java.lang.System.loadLibrary(System.java:1122)
	at com.st.st25pc.model.readers.st.STReader.<init>(STReader.java:103)
	at Main.main(Main.java:6)

My code is literally just

import com.st.st25pc.model.readers.st.STReader;
 
public class Main {
 public static void main(String[] args) {
 
 STReader reader = new STReader();
 }
}

And this time, the streader.dll file does exit !

[Damien G.]

Hello,

in Eclipse we need to append the path to the resource folder to the path environment variable, such as shown in the picture below:

Make sure your path is updated in your run environment as well.