Aim MIL-STD-1553 - Page 174

MIL-STD-1553 Reference Manual
160
Chapter 5 – Buffer Functions
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Buffer Queue size definition (Amount of contiguous Data Buffers)
Value
Constant
Description
0
API_QUEUE_SIZE_1
Queue size 1
1
API_QUEUE_SIZE_2
Queue size 2
2
API_QUEUE_SIZE_4
Queue size 4
3
API_QUEUE_SIZE_8
Queue size 8
4
API_QUEUE_SIZE_16
Queue size 16
5
API_QUEUE_SIZE_32
Queue size 32
6
API_QUEUE_SIZE_64
Queue size 64
7
API_QUEUE_SIZE_128
Queue size 128
8
API_QUEUE_SIZE_256
Queue size 256
0xFFFFFFFF
-
Do not modify this parameter
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0xFFFFFFFF (reserved)
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0xFFFFFFFF (reserved)
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The current buffer index indicates the index of the current data buffer to be used relative to the
buffer queue start. The BIU processor increments or clears the current buffer index in
accordance with the setting of ul_BufferQueueMode (“buffer is valid”).
Value
Description
0..255
Current Buffer Index
(maximum value is restricted with the current buffer queue size)
0xFFFFFFFF
Do not modify this parameter
Output
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Return Value
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1
1
6
6
All API functions return API_OK if no error occurred. If the return value is not equal
to API_OK the function ApiGetErrorDescription can be used to obtain an error
description.