Aim MIL-STD-1553 - Page 263

MIL-STD-1553 Reference Manual
249
Chapter 7 – Bus Controller Functions
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BC Halt Control
Value
Constant
Description
0
API_BC_HLT_NO_HALT
Do not halt on exception
1
API_BC_HLT_HALT_ON_XFER_ERR
Reserved for Halt on Transfer Error
2
API_BC_HLT_HALT_ON_STAT_EXCEPT
Reserved for Halt on Status Word
Exception
3
API_BC_HLT_HALT_ON_ERR_EXCEPT
Reserved for Halt on Transfer Error
and Status Word Exception
4
API_BC_HLT_HALT_ON_ANY_INT
Halt on any Interrupt
5..7
Reserved
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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: An individual transfer retry (value 0 or 1) can only be enabled/disabled if
global BC retry is enabled first with ApiCmdBCIni. The retry protocol
followed will be the protocol defined with ApiCmdBCIni.
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0 (Reserved)
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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!!!