Dalsa PC2-Comp Express OC-P2EM-COMP0, User Manual

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PC2-Comp Express Theory of Operation
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31
Transfer Events:
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"End of Frame" on page 28
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"End of Field" on page 28
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"End of Odd Field" on page 28
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"End of Even Field" on page 28
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"End of Transfer" on page 28
Supported Transfer Cycling Methods
The PC2-Comp Express supports the following transfer cycle modes which are either synchronous or
asynchronous. These definitions are from the Sapera Basic Reference manual.
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CORXFER_VAL_CYCLE_MODE_SYNCHRONOUS_WITH_TRASH
Before cycling to the next buffer in the list, the transfer device will check the next buffer's state. If
its state is full, the transfer will be done in the trash buffer which is defined as the last buffer in the
list; otherwise, it will occur in the next buffer. After a transfer to the trash buffer is done, the
transfer device will check again the state of the next buffer. If it is empty, it will transfer to this
buffer otherwise it will transfer again to the trash buffer.
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CORXFER_VAL_CYCLE_MODE_SYNCHRONOUS_NEXT_EMPTY_WITH_TRASH
Before cycling to the next buffer in the list, the transfer device will check the next buffer's state. If
its state is full, the next buffer will be skipped, and the transfer will be done in the trash buffer,
which is defined as the last buffer in the list; otherwise it will occur in the next buffer. After a
transfer to the trash is done, the transfer device will check the next buffer in the list, if its state is
empty, it will transfer to this buffer otherwise it will skip it, and transfer again to the trash buffer.
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CORXFER_VAL_CYCLE_MODE_SYNCHRONOUS
If next buffer is empty, then transfer to next buffer, otherwise, transfer to current buffer.
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CORXFER_VAL_CYCLE_MODE_NEXT_EMPTY
If next buffer is empty, then transfer to next buffer, otherwise, transfer to next empty buffer in the
list. If all buffers are full, then transfer to current buffer.
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CORXFER_VAL_CYCLE_MODE_ASYNCHRONOUS
The transfer device cycles through all buffers in the list without concern about the buffer state.
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CORXFER_VAL_CYCLE_MODE_OFF
Always transfer to the current buffer.