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Chapter 6 NI-VXI Configuration Utility
PCI-MXI-2 for Linux 6-28 ni.com
Advanced MXI Settings
Click the Advanced button to reach additional configuration options for
the MXI Bus portion of this editor, as shown in Figure 6-10. These options
are intended for more advanced users.
Figure 6-10. Advanced MXI Settings
MXI Auto Retry
The VXI/VME-MXI-2 has an automatic retry feature for cycles that map
from the MXIbus to the VXI/VMEbus. This feature works in the same
manner as the Auto Retry control described in the VXI/VME Bus Options
section. By default, this option is disabled.
Normally, when a cycle maps from the MXIbus to the VXI/VMEbus, any
retry response received on the VXI/VMEbus is passed to the MXIbus.
If you enable the Auto Retry feature, the VXI/VME-MXI-2 automatically
retries any VXI/VME cycle that receives a retry response instead of passing
a retry response on to the MXIbus. The VXI/VME-MXI-2 automatically
continues to retry the VXI/VME cycle until it receives either a DTACK or
BERR response, which it then passes to the MXIbus.
Note The VXI/VME-MXI-2 has a limit on the number of automatic retries it will perform
on any one cycle. If the limit is exceeded and the VXI/VME-MXI-2 receives another retry,
it will pass a retry back to the MXIbus even though Auto Retry is enabled.