Aim MIL-STD-1553 - Page 242

MIL-STD-1553 Reference Manual
228
Chapter 7 – Bus Controller Functions
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Value
Description
0
Initalize all parameters of Instruction Table tbl to 0 (CLEAR)
1
Convert Instruction Table tbl to array ctbl (CONVERT)
2
Write array ctbl to the Instruction list memory area (WRITE)
3
CONVERT and immediately WRITE
4
Convert Instruction Table tbl to array ctbl using “dest_offset” for
calculating the addresses with an offset (CONVERT_OFFSET)
5
CONVERT_OFFSET and immediately WRITE
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2
2
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Amount of entries to convert from BC Instruction Table structure (tbl).
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2
2
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Amount of ctbl entries to write to the Instruction list area of the Global memory.
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Byte offset for writing ctbl entries to Instruction list area. An Offset value of 0 is
identical to the Start address of the Instruction list area within the Global memory
layout (refer to to ApiCmdBCInstrTblIni).
‘mode’
Value
Description
0, 1
0
Reserved
2, 3
byte offset
The instruction list (ctbl) is written to the Global Memory
Instruction list area at offset ‘byte offset’ starting with instruction
at offset ‘byte offset’ in ctbl
Ctbl[byte offset]  GRAM Instruction List Area [byte offset]
4, 5
byte offset
The instruction list (ctbl) is written to the Global Memory
Instruction list area at offset ‘byte offset’ starting with first
instruction in ctbl
Ctbl  GRAM Instruction List Area [byte offset]
Note: This is typically used to compile a partial list only
and write it to the board!
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Y
Y
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BC Instruction Table
typedef struct ty_api_bc_fw_instr {
AiUInt16 label; /* Label */
AiUInt8 op; /* Firmware Opcode */
AiUInt8 res; /* Reserved */
AiUInt32 par1;
AiUInt32 par2;
AiUInt32 laddr; /* Instruction Address for Label */
} TY_API_BC_FW_INSTR;
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1
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6
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Instruction Label (eg. For
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ehavior
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on
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ly of jump destination, start of a transfer
sequence, etc )