Aim MIL-STD-1553 - Apicmdbufdef

MIL-STD-1553 Reference Manual
163
Chapter 5 – Buffer Functions
5.1.3 ApiCmdBufDef
Prototype:
AiInt16 ApiCmdBufDef ( AiUInt32 ul_ModuleHandle, AiUInt8 biu, AiUInt8 bt, AiUInt16 hid,
AiUInt16 bid, AiUInt8 len, AiUInt16 *data, AiUInt16 *rid,
AiUInt32 *raddr );
Driver Command:
API_BUF_DEF (0x50)
Purpose:
This function defines the data buffer contents for transmit or receive messages
in BC and RT mode.
Input
A
A
i
i
U
U
I
I
n
n
t
t
8
8
b
b
t
t
Buffer type
Value
Constant
Description
1
API_BUF_BC_MSG
BC Message Buffer
2
API_BUF_RT_MSG
RT Message Buffer
A
A
i
i
U
U
I
I
n
n
t
t
1
1
6
6
h
h
i
i
d
d
Buffer Header ID
Note: See Section 1.3.5 for the range allowed for this parameter.
A
A
i
i
U
U
I
I
n
n
t
t
1
1
6
6
b
b
i
i
d
d
‘hid’
Value
Constant
Description
0
1..n
Write Buffer Data Words to absolute
Data Buffer Index
Note: See section 1.3.5 for the
range allowed for this
parameter.
>0
0
API_BUF_WRITE_TO_CURRENT
Write to current Data Buffer Index
>0
Write Buffer Data Words to Data
Buffer Index relative to the Data
Buffer Queue Base Index of the
specified Buffer Header Identifier.
A
A
i
i
U
U
I
I
n
n
t
t
8
8
l
l
e
e
n
n
Value
Description
1..32
Amount of Data Buffer Words to write
A
A
i
i
U
U
I
I
n
n
t
t
1
1
6
6
*
*
d
d
a
a
t
t
a
a
Buffer Data Words to write