Aim MIL-STD-1553 - Apicmdbcbhread

MIL-STD-1553 Reference Manual
203
Chapter 7 – Bus Controller Functions
7.1.4 ApiCmdBCBHRead
Prototype:
AiInt16 ApiCmdBCBHRead ( AiUInt32 ul_ModuleHandle, AiUInt8 biu, AiUInt16 uw_HeaderId,
TY_API_BC_BH_INFO *px_Pbh );
Driver Command:
API_BC_BH_READ (0x6D)
Purpose:
This function is used to read the Data Buffer ID, Buffer Queue size, Queue mode, and
error protocol of a BC Buffer Header ID.
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Buffer Header ID
Note: See Section 1.3.5 for the range allowed for this parameter.
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BC Buffer Header information
typedef struct ty_api_bc_bh_info
{
AiUInt16 bid;
AiUInt16 sid;
AiUInt16 eid;
AiUInt16 nbufs;
AiUInt32 hid_addr;
AiUInt32 bq_addr;
AiUInt32 sq_addr;
AiUInt32 eq_addr;
} TY_API_BC_BH_INFO;
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Value
Description
0..2047
Assigned Data Buffer Identifier
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Status Queue Entry Identifier
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Event Queue Entry Identifier
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Value
Description
1..256
Amount of allocated contiguous Data Buffers
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2
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26-bit BC Buffer Header Address (Byte-Address)