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DSI SS7MD Programmer’s Manual Issue 3
6.3.1 LIU_MSG_CONFIG – LIU Configuration Request
Synopsis
Message sent by the application to establish the operating mode for a Line Interface Unit (LIU).
Note: When using the s7_mgt protocol configuration utility, this message is generated by
s7_mgt as a
result of the LIU_CONFIG command. It therefore need not be generated by the user.
Format
Description
This message is sent to the board to configure the operating mode of a Line Interface Unit (LIU). All
configuration parameters must be supplied in the message, that is, it is not possible to modify individual
operating parameters in isolation. On receipt of the message, the board first verifies that the fitted hardware
options support the requested operating mode and then initializes (or reinitializes) the LIU.
The confirmation message (if requested) indicates success with a status value of 0.
Parameters
A description of the permitted parameter values are given below. When the board is initially configured, the
LIUs are initialized to a disabled condition. The LIU_MSG_CONFIG message includes the following
parameters:
• liu_type
The physical interface type according to the following table. The preferred method for configuring an E1
interface is to set a value of 5.
MESSAGE HEADER
Field Name Meaning
type LIU_MSG_CONFIG (0x7e34)
id liu_id (in the range 0 to one less than the number of LIUs)
src Sending module ID
dst MVD_module_ID
rsp_req Used to request a confirmation.
hclass 0
status 0
err_info 0
len 40
PARAMETER AREA
Offset Size Name
01liu_type
11liu_code
2 1 frame_format
31crc_mode
4 1 build_out
5 6 Reserved. Must be set to 0.
11 1 ais_gen
12 6 Reserved. Must be set to 0.
18 1 high_Z
19 2 clk_options
21 19 Reserved. Must be set to 0.
Value Description
1
Disabled (used to deactivate a LIU). In this mode, the LIU does not produce an
output signal.