Aim MIL-STD-1553 - Apicmdreaddiscretes

MIL-STD-1553 Reference Manual
89
Chapter 3 – System Functions
3.1.12 ApiCmdReadDiscretes
Prototype:
AiInt16 ApiCmdReadDiscretes( AiUInt32 ul_ModuleHandle, AiUInt32 *pul_Value );
Driver Command:
API_READ_DISCRETES (0x27)
Purpose:
This command is used to read from the discrete inputs.
Note: Since the discretes are programmable, be sure to have setup the discrete
inputs with the function ApiCmdInitDiscretes()!
Note: this function is not supported for all boards. Please see Table B-III – Function
Support By Boards With ASP for details
I
I
n
n
p
p
u
u
t
t
N
N
o
o
n
n
e
e
O
O
u
u
t
t
p
p
u
u
t
t
A
A
i
i
U
U
I
I
n
n
t
t
3
3
2
2
*
*
p
p
u
u
l
l
_
_
V
V
a
a
l
l
u
u
e
e
Bit 31
Bit 30
Bit 29
Bit 28
Bit 27
Bit 26
Bit 25
Bit 24
Reserved (0)
Bit 23
Bit 22
Bit 21
Bit 20
Bit 19
Bit 18
Bit 17
Bit 16
Reserved (0)
Bit 15
Bit 14
Bit 13
Bit 12
Bit 11
Bit 10
Bit 9
Bit 8
Reserved (0)
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
IN
IN
IN
IN
IN
IN
IN
IN
Note: The bits are only valid if the corresponding discretes are configured as Input
with the function ApiCmdInitDiscretes!