Astronics OMNIBUS II NI PXIe, User Manual

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OmniBus II NI PXIe User Manual 4-1
4. OMNIBUS II FEATURES
This section describes special capabilities and interface signals available on many
OB2 products. Some of these features (such as Inter-Range Instrumentation Group
(IRIG) time) are on all models and others (such as avionics discretes) are only on
a subset. If you need more information than is presented here, please contact
Customer Support for assistance (see Section 1.5).
4.1 PCI Express Bus
OmniBus II PXIe cards interface through a PCIe interface with the following
features:
•
PCIe single-lane (x1) Endpoint
•
Full 2.5 Gbps per direction
•
PCIe bus mastering
4.1.1 PXIe Form Factor
The OmniBus II PXIe card conforms to the PXIe Type 2 Peripheral Board form
factor. The card utilizes a single lane (x1) PCIe interface through the standard PXIe
x8 connector. All power is supplied through the PXIe connectors with no external
power source required.
For more PXIe information, refer to Chapter 5
4.2 Built-in Test
The OB2 family includes onboard circuitry to test card-operation and provide
health information to the user application. Three types of built-in testing are
supported: Power-on, Initiated, and Continuous. You can find a summary of each
of the tests in the following sections. For more information on the API interaction,
please refer to the example programs installed with the Instrument Driver or to one
of the API manuals (e.g.,
MIL-STD-1553 Programming Manual for BTIDriver-
Compliant Devices ).
4.2.1 Power-on Built-in Test (PBIT)
Immediately after power on, hardware verifies the FPGA configuration and writes,
reads, and verifies multiple patterns to the entire onboard RAM; this verifies
memory operation prior to use. In the event of a PBIT error, opening the card
(
BTICard_CardOpen
)
will fail.
4.2.2 Initiated Built-in Test (IBIT)
The user-developed software may initiate a comprehensive hardware test. In
addition to the same memory tests as PBIT, IBIT verifies a range of internal
hardware and host communication. Initiated test resets the card and is not intended
to be performed while the card is configured or running.