"LAT Unit and Transaction ID Bitfield" (SVC/MEM)

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Focus:	Maintenance / Operation
Structures:	Abstract / Concrete

Ancestry:

0x000	pkt	LMEMLOADMEM
0x008	bf	CIDBF idents

Definition:

Alignment:	2-byte boundary
APID:	1604/0x644:4
Attribute(s):
C type:	unsigned short
Length:	16 bits (2 bytes)
Offset:	0x008

Description:

Bitfield to contain the LAT unit that is the target of a MEM telecommand and the transaction ID for the MEM telecommand.

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Item Type and Name

CIDBF (bf)
|  CLATUNIT latUnit (0-3)
|  CTRANID tranID (4-15)

typedef struct _MEM_CIDBF_Bfl {

    #if ENDIANNESS_IS_BIG

    /* Target LAT Unit */
    unsigned short       latUnit:4;

    /* Transaction ID */
    unsigned short       tranID:12;

    #elif ENDIANNESS_IS_LITTLE

    /* Transaction ID */
    unsigned short       tranID:12;

    /* Target LAT Unit */
    unsigned short       latUnit:4;

    #else

    #error _FILE_ ENDIANNESS NOT DEFINED

    #endif

} __attribute__((packed)) MEM_CIDBF_Bfl;

typedef union _MEM_CIDBF {

    /* underlying unsigned short */
    unsigned short                  us;

    /* struct mapped bitfield */
    struct _MEM_CIDBF_Bfl           bf;

} MEM_CIDBF;