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DSI SPCI Network Interface Boards Programmer's Manual Issue 5
77
6.3.12
Configure Clock Priority Request
Synopsis:
Message sent to a DSI SPCI Board to configure the clock recovery priority
order.
Message Format:
MESSAGE HEADER
Field Name
Meaning
type MVD_MSG_CLOCK_PRI
(0x7e21)
id
0
src
Sending Module ID
dst MVD_TASK_ID
rsp_req
used to request a confirmation
hclass
0
status Status
Response
(if confirmation requested)
err_info
0
len
8
PARAMETER AREA
Offset Size
Name
0 1 liu0_pri
1 1 liu1_pri
2 1 liu2_pri
3 1 liu3_pri
4 1 liu4_pri
5 1 liu5_pri
6 1 liu6_pri
7 1 liu7_pri
Description:
This message allows the user to specify a priority for each line interface.
When configured to recover clock from the line interfaces, this priority is used
to decide which line interface to use as the clock source. The highest priority
in-sync line interface is used, with the board automatically moving through
the list of clock sources as line interfaces lose synchronization or are deemed
stable again. If no interfaces are in sync, the board remains in "holdover"
mode, based on the last valid clock that was recovered.
The confirmation message (if requested) indicates success by status of zero.
