Aim MIL-STD-1553 - Page 368

MIL-STD-1553 Reference Manual
354
Chapter 9 – Bus Monitor Functions
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6
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BM Search Specification
Word Entry Specification (Bus Word Entry only)
Bit 15
Bit 14
Bit 13
Bit 12
Bit 11
Bit 10
Bit 9
Bit 8
0 (reserved)
CMD
DATA
STAT
CMD2
WORDB
WORDA
Entry Type to find
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
0 (reserved)
ENTRY_TYPE
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C
M
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D
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C
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o
o
m
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m
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a
a
n
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d
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W
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o
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r
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D
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T
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D
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a
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t
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W
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o
o
r
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S
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T
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S
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t
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a
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t
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u
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W
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o
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r
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C
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M
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D
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2
2
S
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c
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C
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W
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-
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r
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r
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W
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O
O
R
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D
D
B
B
W
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o
o
r
r
d
d
o
o
n
n
M
M
I
I
L
L
-
-
B
B
u
u
s
s
B
B
W
W
O
O
R
R
D
D
A
A
W
W
o
o
r
r
d
d
o
o
n
n
M
M
I
I
L
L
-
-
B
B
u
u
s
s
A
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E
E
N
N
T
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R
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Y
Y
_
_
T
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Y
Y
P
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E
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Entry Type to find
Value
Constant
Description
0
API_BM_ENTRY_BUS_WORD
Bus Word Entry
1
API_BM_ENTRY_ERROR_WORD
Error Word Entry
2
API_BM_ENTRY_TIMETAG_LOW
Reserved for Time Tag Low Entry
3
API_BM_ENTRY_TIMETAG_HIGH
Reserved for Time Tag High Entry
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Entry Word to find:
For Bus Word Entry: Received Bus Word
For Error Word Entry: Error specification as described for
ApiCmdBMStackEntryRead’
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Entry Mask Word (Bus Word Entry and Error Word Entry)
Defines which bits are relevant for the search operation.
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Y
Y
_
_
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P
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I
I
_
_
B
B
M
M
_
_
S
S
T
T
A
A
C
C
K
K
_
_
F
F
N
N
D
D
*
*
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BM Entry Find information
typedef struct ty_api_bm_stack_fnd
{
AiUInt8 efnd;
AiUInt8 padding1;
AiUInt16 padding2;
AiUInt32 eptr;
AiUInt32 entry;
} TY_API_BM_STACK_FND;
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Value
Constant
Description
0
API_BM_ENTRY_NOT_FOUND
Entry not found
1
API_BM_ENTRY_FOUND
Entry found
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1
1
0 (reserved)
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6
6
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2
2
0 (reserved)