access .dll c# open in java

Unity Engine
1

Hi all,

I am newbie in unity and java. I have a project to modify an unity game application which this game is using java script. I want to add the haptic feedback for this application using my device.
I have dll library of my device which generate from .c and .h with visual studio 10 name tensLib.dll.

I have try like this:

#pragma strict
#pragma implicit
#pragma downcast

import System;
import System.Runtime.InteropServices;


class SController extends MonoBehaviour
{
    // Public variables shown in inspector
    @DllImport("tensLibs.dll")

//etc

}

but there is error occur :
BCE0153: ‘System.Runtime.InteropServices.DllImportAttribute’ can be applied on one of these targets only : Method.

my question is how to add and access .dll to java in unity?

2

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3

Hi Graham,

Thank you for the answer, I have try this code using javascript:

@DllImport("tensLibs.dll")
    public static function tens_init (string):int {};

but the error is like this

MarshalDirectiveException: Marshalling of type object is not implemented

I have tried to read this function using the c# and working, I am using this code:

[DllImport("tensLibs.dll", EntryPoint="tens_init")]
    public static extern int tens_init ([MarshalAsAttribute(UnmanagedType.LPStr)]string port);

the function in c is like this:

static int tens_write( unsigned char* buf, int count )
{
    unsigned char chksum = 0;
    int i;
    DWORD nbytes;

    /* Are we connected? */
    if ( hnd_serial == INVALID_HANDLE_VALUE ) {
        PRINTF( "No serial connection.\n" );
        return FALSE;
    }
  
    /* Generate checksum. */
    for ( i = 0; i < count; i++ )
        chksum ^= buf[i];
      
    /* Attempt to transmit packet followed by checksum. */
    if ( !WriteFile( hnd_serial, buf, count, &nbytes, NULL ) ||
         !WriteFile( hnd_serial, &chksum, 1, &nbytes, NULL ) )
    {
        PRINTF( "Serial write error.\n"
                "Connection closed.\n" );
        CloseHandle( hnd_serial );
        hnd_serial = INVALID_HANDLE_VALUE;
        return FALSE;
    }
  
    return TRUE;
}

I have try to change the data type in javascript but still can not help. the error still appear.
I need to use this dll to be used in javascript.