CSS CANedge1, Руководство пользователя

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CANedge2 Docs, Release FW 01.04.02
Length of
data
is zero
The transmit is a SUBSCRIBE frame, meaning that a Subscriber on the bus is expected to provide the
data payload (satisfying the frame table ).
Length of
data
is above zero
The transmit is a PUBLISH frame, meaning that the CANedge provides the data payload.
In Publisher mode, the CANedge schedules the frame transmissions configured by the
period
and
delay
.
Warning: Be aware that transmit uses
period
and
delay
to schedule transmissions. This is a
different concept than what is used by LDF files.
Subscriber mode
In Subscriber mode, the CANedge awaits a SUBSCRIBE frame with a matching ID from the bus
Publisher node. The number of bytes provided shall satisfy the frame table .
Warning: If the transmit list contains multiple frames using the same ID, then only the first entry
is used.
0.4.6.4 Topology
The LIN master’s task is to schedule transmissions. The LIN slaves react to the messages scheduled by
the master. The configuration of the LIN network shall ensure that each message has one producer.
The CANedge connects as a slave to the LIN-bus. A master node is required to schedule the transmis-
sions. Below illustrates how the CANedge can be connected to the bus:
0.4.6.5 Data length
Unless configured otherwise, the device assumes that the length of the LIN frame data payload is always
defined by the message ID (bits 5 and 6 of the identifier), as defined in the table below:
Message ID Data length
00-31 (0x00-0x1F) 2
32-47 (0x20-0x2F) 4
48-63 (0x30-0x3F) 8
0.4. Configuration 43