Aim MIL-STD-1553 - Apicmdbcstatusread

MIL-STD-1553 Reference Manual
244
Chapter 7 – Bus Controller Functions
7.1.23 ApiCmdBCStatusRead
Prototype:
AiInt16 ApiCmdBCStatusRead ( AiUInt32 ul_ModuleHandle, AiUInt8 biu,
TY_API_BC_STATUS_DSP *pdsp );
Driver Command:
API_BC_STATUS_READ (0x7A)
Purpose:
This function is used to read the actual execution status of the Bus Controller.
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o
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Y
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A
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BC Status Information
typedef struct ty_api_bc_status_dsp
{
AiUInt8 status;
AiUInt8 padding1;
AiUInt16 hxfer;
AiUInt32 glb_msg_cnt;
AiUInt32 glb_err_cnt;
AiUInt32 hip;
AiUInt32 mfc;
} TY_API_BC_STATUS_DSP;
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Bus Controller execution status
Value
Constant
Description
1
API_BC_STATUS_HALTED
BC halted
2
API_BC_STATUS_BUSY
BC busy
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1
1
Reserved (0)
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1
1
6
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BC HALT on Interrupt Transfer Identifier
Value
Description
0
BC halted normally
1.. n
BC halted by Interrupt at Transfer Identifier (hxfer)
See Section 1.3.5 for the range allowed for this
parameter
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A
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n
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3
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2
2
g
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l
l
b
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_
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m
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s
s
g
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_
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n
n
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Global BC Message Counter
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2
2
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Global BC Error Counter
Note: 'glb_msg_cnt' and
'glb_err_cnt' are cleared on
restart of the AIM board Bus
Controller when the
ApiCmdBCStart' function is
called.