Union c in labview

[VINCENZO]

I have to create a library that has as input the pointer to this structure   unsigned char	Type
unsigned int	Len
union {
unsigned char   Raw [EFIUDS_MSG_MAX_DATA_SIZE]
struct {
unsigned char   SI
unsigned char   PARAM [EFIUDS_MSG_MAX_DATA_SIZE-1]
}   REQUEST
struct {
unsigned char   PR_SI
unsigned char   PARAM [EFIUDS_MSG_MAX_DATA_SIZE-1]
}   POSITIVE_RESPONSE
struct {
unsigned char   NR_SI
unsigned char   SI
unsigned char   NRC
}   NEGATIVE_RESPONSE
}	Data how do i implement the labview? thank you

[ensegre]

 

[ensegre]

54 minutes ago, VINCENZO said:

I have to create a library

you mean create a LV library? Which kind of?

[ShaunR]

Pass a U8 array of length EFIUDS_MSG_MAX_DATA_SIZE

Unions are syntactic sugar for a single piece of contiguous memory. You'll just have to figure out how to interpret the data.

[VINCENZO]

19 hours ago, ShaunR said:

Pass a U8 array of length EFIUDS_MSG_MAX_DATA_SIZE

Unions are syntactic sugar for a single piece of contiguous memory. You'll just have to figure out how to interpret the data.

Ok,

thank You!

[Taylorh140]

Be careful of Pragma pack when your trying to line things up for larger types.