Freescale Semiconductor M68HC08 series, Руководство по проектированию

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DRM047 — Rev 0 Designer Reference Manual
MOTOROLA Messaging Scheme Description 35
Designer Reference Manual — DRM047
Section 4. Messaging Scheme Description
This section describes LIN messaging.
4.1 Axis and Signal Providers and Acceptors
As shown in Figure 2-1 , each LIN Stepper Controller node has a relation
to the concrete controlled axis. The LIN messaging scheme was
designed to support this concept. Most of the signal in
Table C-1 has 3
or 4 modification, which differs only with the identifier byte. Each node is
programmed to be an acceptor (acts upon) and providers (sends the
response fields) for one exclusive signal set. The signal sets are marked
according to the controlled axis:
• A1_1
• A1_2
• A2
• A3
The signal provider and acceptor is determined by the preprogrammed
axis.
A special meaning is given to the horizontal Axis1. It is expected that one
control signal is sufficient for both right and left headlamp. Therefore two
nodes with signal sets Axis1_1 and Axis1_2 are acceptors for Axis1
signals. This uses and demonstrates the LIN-bus multicast concept.
There are two ways to program the LIN Stepper Controller node to a
dedicated axis:
1. Setting appropriate target Axis1_1, Axis1_2, Axis2, Axis3 in the
lin_stepper.mcp file. This will create the compiled code with the
required setting.
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