"Last boot command bitfield" (OS/PBC)

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Focus:	Maintenance / Operation
Structures:	Abstract / Concrete

Ancestry:

0x000	pkt	LBTEPU1HKP
0x020	bf	BOOTCOMMAND tcLast

Definition:

Alignment:	2-byte boundary
APID:	610/0x262
Attribute(s):
C type:	unsigned short
Length:	16 bits (2 bytes)
Offset:	0x020

Description:

Bitfield to hold APID and function code of command most recently received by the PBC.

Layout: (hide detail; help)

Start	Stop	Size		Item Type and Name
0	4	5		BOOTLASTFUNC func
5	15	11		BOOTLASTAPID apid

BOOTCOMMAND (bf)
|  BOOTLASTFUNC func (0-4)
|  BOOTLASTAPID apid (5-15)

typedef struct _PBC_BOOTCOMMAND_Bfl {

    #if ENDIANNESS_IS_BIG

    /* Last Function Code */
    unsigned short       func:5;

    /* Last APID */
    unsigned short       apid:11;

    #elif ENDIANNESS_IS_LITTLE

    /* Last APID */
    unsigned short       apid:11;

    /* Last Function Code */
    unsigned short       func:5;

    #else

    #error _FILE_ ENDIANNESS NOT DEFINED

    #endif

} __attribute__((packed)) PBC_BOOTCOMMAND_Bfl;

typedef union _PBC_BOOTCOMMAND {

    /* underlying unsigned short */
    unsigned short                  us;

    /* struct mapped bitfield */
    struct _PBC_BOOTCOMMAND_Bfl     bf;

} PBC_BOOTCOMMAND;

Fields:

BOOTLASTAPID (index)

Attribute(s):  

Brief:  "Last APID"

Instance(s):  apid

APID of last command received by the PBC.

BOOTLASTFUNC (index)

Attribute(s):  

Brief:  "Last Function Code"

Instance(s):  func

Function code of the last command received by the PBC.