Freescale Semiconductor M68HC08 series, Руководство по проектированию

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Messaging Scheme Description
Designer Reference Manual DRM047 — Rev 0
36 Messaging Scheme Description MOTOROLA
2. using LIN reconfiguration as described in Appendix C.3. LIN
Leveller Configuration Frames or Section 6.1.9. Reconfig LIN .
NOTE:
The user must guarantee that there will be no other nodes with the same
axis connected to one LIN-bus.
4.2 LIN Leveller Basic Messaging
The basic message frames are used for standard control operation. The
frame provided by master node is:
• frmPosCmd
The frames provided by slave nodes are:
• frmPosStatus
• frmAppStatus
A detailed description of the basic messaging frames and signals is in
Appendix C.1. LIN Leveller Basic Frames .
The scheduling of the signals is determined by the LIN Master. The LIN
Master setting is provided from the PC computer control page and is
described in the
Section 7. User Interface Description . The master
serves two messaging loops. Each loop can handle up to three signal
frames (frmPosCmd, frmPosStatus, frmAppStatus). Each of the three
signal frames can be chosen according to a required axis. Any of the
three frames can be disabled.
Loop1 sends signals with period periodeSend_Loop1 . This period can
be modified by the control page (see Figure 7-2 ). If all three frames are
enabled, the LIN Master controls consecutive sending of Loop1 frames
frmPosCmd , frmPosStatus , frmAppStatus immediately after each
other. Then it waits to get the periodeSend_Loop1 between sending. If
Loop2 is also enabled, the three frames of Loop2 are sent after Loop1.
The details are described in the
Section 7. User Interface Description .
The default value of the periodeSend_Loop1 is 30 ms.
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