National Instruments Corporation

Tony Widjaja

Craig A Aiken

Boris M Bak

Khasid M Ali Khan

Charles E Crain, Ii

System and method for performing distributed input/output (I/O). A distributed I/O device (the device) coupled to a controller may read data from a serial port, may determine if the data are framed by time, and if so, may handle the data according to a time-based protocol. If the data are not framed by time, the device may determine if the data are framed by delimiters, and if so, may determine an appropriate delimiter-based protocol for the data from a plurality of delimiter-based protocols, and handle the data according to the appropriate delimiter-based protocol. This process may be repeated in an iterative manner to read a stream of data from the serial port. The device may include or be coupled to one or more I/O modules (e.g., for DAQ, motion control, etc.), which themselves may be coupled to a unit under test or other external device or phenomenon via additional devices.

Serial port that supports multiple protocols

A system and method for efficient transfer and buffering of captured data events. The system includes data capture logic configured to capture data events from a nondeterministic data bus; a system memory including a plurality of addressable locations, where a subset of the plurality of addressable locations is configured as a data event buffer; a DMA transfer engine configured to transfer the captured data events from the data capture logic to a region of the data event buffer as portions of the captured data events become available from the data capture logic; and an application configured to access the data event buffer to process the captured data events without the DMA transfer operation being stopped. In response to the region being filled, the DMA transfer engine may perform the DMA transfer operation to a different region of the data event buffer without the DMA transfer operation being stopped.

System and method for efficient DMA transfer and buffering of captured data events from a nondeterministic data bus

A system and method for real-time processing of nondeterministic captured data events. The system includes data capture logic configured to capture data events from a nondeterministic data bus; a system memory including a plurality of addressable locations, where a subset of the plurality of addressable locations is configured as a data event buffer; a DMA transfer engine configured to transfer the captured data events from the data capture logic to a region of the data event buffer as portions of the captured data events become available from the data capture logic; and an application configured to retrieve captured data events from the data event buffer and to display the retrieved data events substantially in real time with respect to the occurrence of the corresponding captured data events on the nondeterministic data bus.

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Austin, TX, United States of America

Tony Widjaja