Struct with pointer

Question

Hello I need to interface with a DLL with the folowing structure:
extern "C" {
struct IDSTRUCT
UINT8 code[2];
UINT8 signature[8];
UINT8 revision [4];
R2DLL_API BOOL R2DLL_ReadFirmwareHeader (UINT16 port, struct IDSTRUCT* pStoreAdr);
Is there a way to implement this with clusters in labVIEW?
Thanks in advance

Answer 1

"mudder" <[email protected]> wrote in message news:[email protected]..
I'm not sure how to handle structs with unions with another struct inside.&nbsp; I'm new at LabVIEW
&nbsp;
what if the structure was like this:
&nbsp;
#pragma pack(push, 2)
struct IDSTRUCT{
&nbsp;&nbsp; UINT32 temp;
&nbsp;&nbsp; union
&nbsp;&nbsp; {&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; UINT32 x;
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; struct
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; {
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; UINT32 x1&nbsp;&nbsp;&nbsp; :1;
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; UINT32 x2 &nbsp;&nbsp; :31;
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; };&nbsp;&nbsp; };
&nbsp;&nbsp;
&nbsp;&nbsp; union
&nbsp;&nbsp; {&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; UINT32 y;
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; struct
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; {
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; UINT32 y1&nbsp;&nbsp;&nbsp; :1;
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; UINT32 y2&nbsp;&nbsp;&nbsp; :31;
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; };&nbsp;&nbsp; };};#pragma pack(pop)
This is basically a pointer to four U32's. Because it is a union, the pointer can point to:
temp { x {x1, x2 } }
Or:
temp { x {y1, y2 } }
I'd use a cluster with 4 U32's. The sub structures have no size, and can be ignored in LabVIEW.
Regards,
Wiebe.