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Appendix D Common Questions
© National Instruments Corporation D-3 VXI-USB User Manual
What can I do to make sure that my system is up and running?
The fastest method for testing the system is to run Resman. This program
attempts to access memory in the upper A16 address space of each device
in the system. If Resman does not report any problems, the VXI-USB
communication system is operational. To test individual devices, you can
use the VIC or VISAIC program to interactively issue NI-VXI functions or
NI-VISA operations, respectively. You can use
viIn() and viOut() with
the NI-VISA API (or
VXIin() or VXIinReg() and VXIout() or
VXIoutReg() with the NI-VXI API) to test register-based devices by
programming their registers. If you have any message-based devices, you
can send and receive messages with the
viRead() and viWrite()
operations in the NI-VISA API (or
WSrd() and WSwrt() functions in the
NI-VXI API). Notice that
VXIinReg() and VXIoutReg() are for VXI
devices only, but you can use
VXIin() and VXIout() for both VXI and
VME. Finally, if you are using LabVIEW or LabWindows/CVI and you
have instrument drivers for the devices in your chassis, you can use the
interactive features of these programs to quickly test the functionality of the
devices.
What do the LEDs on the front of the VXI-USB mean?
The VXI-USB has the following front panel LEDs:
• FAILED—Indicates the VXI-USB is asserting SYSFAIL on the bus
due to a controller failure.
• SYSFAIL—Indicates the VMEbus SYSFAIL line is asserted by the
VXI-USB or another device on the bus.
• VXI—Indicates the VXI-USB is being accessed as a VXI slave.
• ONLINE
– Green—Indicates the VXI-USB is configured by Resman.
– Amber—Indicates the VXI-USB is not configured by Resman.
• USB—Indicates there is USB traffic to/from the VXI-USB (this
excludes any traffic to all other downstream USB devices).
• LINK
– Green—Indicates the VXI-USB is connected to a USB host and
has a full-speed (USB 1.x, 12 Mbps) connection.
– Amber—Indicates the VXI-USB is connected to a USB host and
has a high-speed (USB 2.0, 480 Mbps) connection.
When all six LEDs are solid on, the FPGA image is corrupted. Recover the
firmware to repair the board.