Aim MIL-STD-1553 - Page 233

MIL-STD-1553 Reference Manual
219
Chapter 7 – Bus Controller Functions
A
A
i
i
U
U
I
I
n
n
t
t
8
8
r
r
t
t
e
e
Retry enable (see also parameter ‘retr’ of command ApiCmdBCIni) and toggle bus control
Value
Constant
Description
0
API_DIS
Retry disabled
1
API_ENA
Retry enabled
2
API_TOGGLE_BUS_KEEP
Keep bus at next transmission of this transfer.
3
API_TOGGLE_BUS_ALT
Usa alternate bus at next transmission of this
transfer
Note: Values 2 and 3 are not available on devices with a multi channel firmware. Please
see chapter “Limitations for specific boards” for details.
A
A
i
i
U
U
I
I
n
n
t
t
8
8
r
r
e
e
s
s
0 (Reserved)
A
A
i
i
U
U
I
I
n
n
t
t
8
8
s
s
x
x
h
h
Status Word Exception handling of Service Request control (only applicable when Service
Request / Vector Word Mode Control is enabled using ApiCmdBCIni command). See
ApiCmdBCSrvReqVecStatus for further information.
Value
Constant
Description
0
API_BC_SRVW_DIS
No Status Word Service Request handling
1
API_BC_SRVW_ENA
Generate automatic Transmit Vector Word mode code
(Mode code 16) if Service Request Bit of the received
Status Word is set
Note: Automatic Mode code generation on Service
Request Bit will only be processed if no error is detected
and no fast Intermessage Gap mode is enabled (refer to
‘gap_mode’). For Automatic Mode code generation on
Service Request Bit the first received Status Word is
evaluated, thus this function is only applicable for BC-RT
and RT-BC transfer types (refer to ‘type’).
2
API_BC_SRVW_SINGLE
Single RX/TX transaction
Only applicable for BC-RT and RT-BC transfer types.
(refer to ‘type’). This transfer will define the Single RX/TX
transmission to be used if requested in the RT Vector
Word. Since such transfer is inserted after decoding of a
previous Transmit Vector Word mode code ‘xid’ shall not
be used in the ApiCmdBCFrameDef command
3
API_BC_SRVW_MULTIPLE
Multiple / Delete RX/TX transaction
Only applicable for BC-RT and RT-BC transfer types (refer
to ‘type’). This transfer will define the Multiple RX/TX
transmission to be used if requested in the RT Vector
Word. Since such transfer is inserted after decoding of a
previous Transmit Vector Word mode code ‘xid’ shall not
be used in the ApiCmdBCFrameDef command
Note: Values 2 and 3 are not applicable, when using the functions
ApiCmdBCInstrTblIni, ApiCmdBCInstrTblGen and
ApiCmdBCInstrTblGetAddrFromLabel!!!
A
A
i
i
U
U
I
I
n
n
t
t
8
8
r
r
s
s
p
p
Expected Response Control for Command Word
Value
Constant
Description
0
API_BC_RSP_AUTOMATIC
Automatic Response Control
In this mode BC expects appropriate RT-
Response to the defined Transfer Type,
dependent on the MIL-STD 1553 protocol
type(s), which is (are) defined for the RT(‘s)
with the function ApiCmdDefMilbusProtocol
1
API_BC_RSP_NO_SW1_EXPECTED
No Status Word 1 expected (Note: for RT-
RT transfer type Status Word 1 represents
the status response for the Transmit
Command word)
2
API_BC_RSP_NO_SW2_EXPECTED
No Status Word 2 expected (RT-RT
transfer type only, Note: for RT-RT transfer
type Status Word 2 represents the status
response for the Receive Command word)