I think that it is strange, but in this method: rettem=K_Move_Data_HL(&hdev,FALSE,33,&AICp[0],-1,1,"_aicreg",Sym) The &AICp[0] is a pointer correct?

and, in my Java code I have: ret = sranger.K_Move_Data_HL(hDev, 0, nbWords, AICp, dspAddress, 1, "_aicreg", Sym); The AICp in not a pointer, is a copy of my array AICp correct?

How can I solve this problem? Is there any way to do it in JNA? Pass a pointer to a array and not the array to the function?

Thanks!!

2008/11/14 Edroaldo Lummertz da Rocha <edro...@gmail.com> I need to develop a code to the Signal Ranger Digital Signal Processing boad. The fabricant of these board provided a DLL (SRangel_HL.dll) for acess the DSP.

These DLL has the following methods:

int Initialize_HL(PCHAR BoardID,void ** hDev);

int DriverClose_HL(void ** hDev);

int K_Move_Data_HL(void ** hDev,BOOL RW,unsigned short Nb_Words, unsigned short * Buffer,signed long DSPAddress, int MemSpace,char * Symbol,struct HSymTbl SymTable);

int LoadUser_HL(void ** hDev,char * FilePath,struct HSymTbl * pSymTable);

int ExecUser_HL(void ** hDev,signed long DSPAddress,char * Symbol, struct HSymTbl SymTable);

Find_Label_HL(char *label, struct HSymTbl ptrSymTbl);

There is two other functions, but I just need it. The fabricant provides a Visual C++ source code, where only these functions are present, so, for while, I just need that it works.

My Java interface is:

public interface SignalRangerInterface extends Library { public int Initialize_HL(String boardId, PointerByReference hDev);

public int LoadUser_HL(PointerByReference hDev, String filePath, SignalRanger.HSymTbl pSymTable);

public int K_Move_Data_HL(PointerByReference hDev, int rw, short nbWords, short[] buffer, NativeLong dSPAdrress, int memSpace, String symbol, SignalRanger.HSymTbl.ByValue symTable);

public int ExecUser_HL(PointerByReference hDev, NativeLong dSPAddress, String symbol, SignalRanger.HSymTbl.ByValue pSymTable);

public int Load_Kernel_HL(PointerByReference hDev);

public int DriverClose_HL(PointerByReference hDev);

public int Find_Label_HL(String label, SignalRanger.HSymTbl.ByValue symTable); }

All thes function returns 0, when everything is right, and negative values when somethig is wrong, for example, -1 when the Initizalize_HL() cannot find the board.

I also need to use a struct, define in C++ as:

struct HSymTbl { unsigned long pSymTbl; unsigned long length; };

This Structure is defined inside my main class. The Java Structure is:

public static class HSymTbl extends Structure { public static class ByValue extends HSymTbl implements Structure.ByValue{

} public NativeLong pSymTbl; public NativeLong length; }

In Visual C++ code, the fabricant does it:

void *hdev; struct HSymTbl Sym;

so, I call (in C++) Initialize_HL("Ranger0", &hdev);.

The next call is c++ is:

unsigned short AICp[34]; AICp [0 ]= 8;AICp[1]=25168;AICp[2]=16976;AICp[3]=8784;AICp[4]=592;AICp[5]=25168; AICp [6 ]= 16976 ;AICp[7]=8784;AICp[8]=592;AICp[9]=25601;AICp[10]=17409;AICp[11]=9217; AICp [12 ]= 1025 ;AICp [13 ]=25601;AICp[14]=17409;AICp[15]=9217;AICp[16]=1025;AICp[17]=26113; AICp [18 ]= 17921 ;AICp [19]=9729;AICp[20]=1537;AICp[21]=26113;AICp[22]=17921;AICp[23]=9729; AICp [24 ]= 1537 ;AICp [25 ]=26639;AICp[26]=18447;AICp[27]=10255;AICp[28]=2063;AICp[29]=26639; AICp[30]=18447;AICp[31]=10255;AICp[32]=2063;

char path[]="Demo2_sr.out";

ret=LoadUser_HL(&hdev,path,&Sym);

if LoadUser_HL is ok, I call the function:

rettem=K_Move_Data_HL(&hdev,FALSE,33,&AICp[0],-1,1,"_aicreg",Sym);

In my Java code:

PointerByReference hDev = new PointerByReference(); HSymTbl.ByValue Sym = new HSymTbl.ByValue(); Initialize_HL("Ranger0", hDev);

The return value is 0, indicating that is ok!

After, I need to load my DSP code inside the board. My dsp code is on the Demo2_sr.out. I se LoadUser_HL() for this;

short nbWords = 33; NativeLong dspAddress = -1; int ret = 0; String path = "Demo2_sr.out";

value = sranger.LoadUser_HL(hDev, path, Sym);

Here, the function needs to receive a pointer to HSymTable. The return value is 0, and it indicate the it is ok, but looks like the "by" (that represents my Structure) is not be initialized.

I do not know what is happening here, because the function says the everything is correct. But, when I call the next method that I need, I have a negative return value and is not ok. This function is:

ret = sranger.K_Move_Data_HL(hDev, 0, nbWords, AICp, dspAddress, 1, "_aicreg", Sym);

where AICp is:

short AICp[] = new short[33];

AICp [0 ]= 8;AICp[1]=25168;AICp[2]=16976;AICp[3]=8784;AICp[4]=592;AICp[5]=25168;

AICp [6 ]= 16976 ;AICp[7]=8784;AICp[8]=592;AICp[9]=25601;AICp[10]=17409;AICp[11]=9217;

AICp [12 ]= 1025 ;AICp [13 ]=25601;AICp[14]=17409;AICp[15]=9217;AICp[16]=1025;AICp[17]=26113; AICp [18 ]= 17921 ;AICp [19]=9729;AICp[20]=1537;AICp[21]=26113;AICp[22]=17921;AICp[23]=9729; AICp [24 ]= 1537 ;AICp [25 ]=26639;AICp[26]=18447;AICp[27]=10255;AICp[28]=2063;AICp[29]=26639; AICp[30]=18447;AICp[31]=10255;AICp[32]=2063;

I think that it defines my problem.

I think that the problem is in the pointer refnum and Sym. Do use a void *hDev is the same that use PointerByReference hDev? In call in C++: Initialize_HL("Ranger0", &hdev); is equivalent to Java Initialize_HL("Ranger0", hDev); considering the previous initializations

The Visual C++ call

rettem=K_Move_Data_HL(&hdev,FALSE,33,&AICp[0],-1,1,"_aicreg",Sym) is same of Java call: ret = sranger.K_Move_Data_HL(hDev, 0, nbWords, AICp, dspAddress, 1, "_aicreg", Sym);

Of some way, looks like that the Sym Structure is not initialized when I call LoadUser_HL(), but I do not know why.

Thanks so much for help!!!