"Current heater command and LTC control mode" (APP/LHK)

View Options: (help)

Focus:	Maintenance / Operation
Structures:	Abstract / Concrete

Ancestry:

0x000	pkt	LtcData0
0x03A	bf	HeaterCommand htrCmd

Definition:

Alignment:	2-byte boundary
APID:	558/0x22E
Attribute(s):
C type:	unsigned short
Length:	16 bits (2 bytes)
Offset:	0x03A

Description:

For the heater bits, a value of '0' indicates that LTC is commanding the heater off. A value of '1' indicates that LTC is commanding the heater on. These heater commands are applied only when LTC is in active control mode.

Layout: (hide detail; help)

Start	Stop	Size		Item Type and Name
0	0	1		ControlMode cntlMode
1	3	3		Padus3 pad3
4	4	1		HeaterMask htr11
5	5	1		HeaterMask htr10
6	6	1		HeaterMask htr9
7	7	1		HeaterMask htr8
8	8	1		HeaterMask htr7
9	9	1		HeaterMask htr6
10	10	1		HeaterMask htr5
11	11	1		HeaterMask htr4
12	12	1		HeaterMask htr3
13	13	1		HeaterMask htr2
14	14	1		HeaterMask htr1
15	15	1		HeaterMask htr0

HeaterCommand (bf)
|  ControlMode cntlMode (0)
|  Padus3 pad3 (1-3)
|  HeaterMask htr11 (4) ... htr0 (15)

typedef struct _LHK_HeaterCommand_Bfl {

    #if ENDIANNESS_IS_BIG

    /* LTC control mode */
    unsigned short       cntlMode:1;

    /* Explicit 3 bit pad in unsigned short */
    unsigned short       pad3:3;

    /* Mask for VCHP heater control/state */
    unsigned short       htr11:1;

    /* Mask for VCHP heater control/state */
    unsigned short       htr10:1;

    /* Mask for VCHP heater control/state */
    unsigned short       htr9:1;

    /* Mask for VCHP heater control/state */
    unsigned short       htr8:1;

    /* Mask for VCHP heater control/state */
    unsigned short       htr7:1;

    /* Mask for VCHP heater control/state */
    unsigned short       htr6:1;

    /* Mask for VCHP heater control/state */
    unsigned short       htr5:1;

    /* Mask for VCHP heater control/state */
    unsigned short       htr4:1;

    /* Mask for VCHP heater control/state */
    unsigned short       htr3:1;

    /* Mask for VCHP heater control/state */
    unsigned short       htr2:1;

    /* Mask for VCHP heater control/state */
    unsigned short       htr1:1;

    /* Mask for VCHP heater control/state */
    unsigned short       htr0:1;

    #elif ENDIANNESS_IS_LITTLE

    /* Mask for VCHP heater control/state */
    unsigned short       htr0:1;

    /* Mask for VCHP heater control/state */
    unsigned short       htr1:1;

    /* Mask for VCHP heater control/state */
    unsigned short       htr2:1;

    /* Mask for VCHP heater control/state */
    unsigned short       htr3:1;

    /* Mask for VCHP heater control/state */
    unsigned short       htr4:1;

    /* Mask for VCHP heater control/state */
    unsigned short       htr5:1;

    /* Mask for VCHP heater control/state */
    unsigned short       htr6:1;

    /* Mask for VCHP heater control/state */
    unsigned short       htr7:1;

    /* Mask for VCHP heater control/state */
    unsigned short       htr8:1;

    /* Mask for VCHP heater control/state */
    unsigned short       htr9:1;

    /* Mask for VCHP heater control/state */
    unsigned short       htr10:1;

    /* Mask for VCHP heater control/state */
    unsigned short       htr11:1;

    /* Explicit 3 bit pad in unsigned short */
    unsigned short       pad3:3;

    /* LTC control mode */
    unsigned short       cntlMode:1;

    #else

    #error _FILE_ ENDIANNESS NOT DEFINED

    #endif

} __attribute__((packed)) LHK_HeaterCommand_Bfl;

typedef union _LHK_HeaterCommand {

    /* underlying unsigned short */
    unsigned short                  us;

    /* struct mapped bitfield */
    struct _LHK_HeaterCommand_Bfl   bf;

} LHK_HeaterCommand;

Fields:

ControlMode (index)

Attribute(s):  

Brief:  "LTC control mode"

Instance(s):  cntlMode

A bit value of '0' indicates passive control mode. A bit value of '1' indicates active control mode.

HeaterMask (index)

Attribute(s):  

Brief:  "Mask for VCHP heater control/state"

Instance(s):  htr0, htr1, htr10, htr11, htr2, htr3, htr4, htr5, htr6, htr7, htr8, htr9

Padus3 (index)

Attribute(s):  

Brief:  "Explicit 3 bit pad in unsigned short"

Instance(s):  pad3

Explicit 3 bit pad in unsigned short