Aim MIL-STD-1553 - Page 274

MIL-STD-1553 Reference Manual
260
Chapter 7 – Bus Controller Functions
O
O
u
u
t
t
p
p
u
u
t
t
T
T
Y
Y
_
_
A
A
P
P
I
I
_
_
B
B
C
C
_
_
X
X
F
F
E
E
R
R
_
_
D
D
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P
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*
*
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BC Transfer Status information
typedef struct ty_api_bc_xfer_dsp
{
AiUInt16 cw1;
AiUInt16 st1;
AiUInt16 cw2;
AiUInt16 st2;
AiUInt16 bid;
AiUInt16 brw;
AiUInt32 bufp;
AiUInt32 ttag;
AiUInt32 msg_cnt;
AiUInt32 err_cnt;
AiUInt32 lvw;
AiUInt32 srvreq_cnt;
} TY_API_BC_XFER_DSP;
A
A
i
i
U
U
I
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1
1
6
6
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c
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1
1
Command Word 1
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A
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U
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1
1
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6
s
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1
Last received Status Word on Command Word 1
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1
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2
Command Word 2 (RT-RT Transfers)
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1
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2
Last received Status Word on Command Word 2 (RT-RT Transfers)
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I
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1
1
6
6
b
b
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d
d
Value
Description
0..2047
Current Buffer Index
A
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n
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t
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1
1
6
6
b
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Buffer Report Word
Bit 15
Bit 14
Bit 13
Bit 12
Bit 11
Bit 10
Bit 9
Bit 8
0 (reserved)
BUF_STAT
0 (reserved)
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
0 (reserved)
RBUS
ERR_REPORT
B
B
U
U
F
F
_
_
S
S
T
T
A
A
T
T
Buffer Status
Value
Constant
Description
0
API_BUF_NOT_USED
Buffer not used
1
API_BUF_FULL
Buffer full
2
API_BUF_EMPTY
Buffer empty
3
reserved
R
R
B
B
U
U
S
S
Received Bus Flag
Value
Constant
Description
0
API_RCV_BUS_SECONDARY
Secondary Bus
1
API_RCV_BUS_PRIMARY
Primary Bus