(i9) United States
(12) Patent Application Publication
Canter et al.
(54) PACKET CAPTURE AGENT FOR USE IN
FIELD ASSETS EMPLOYING SHARED BUS
(76) Inventors: James M. Canter, Austin, TX (US);
Bryan W. Godwin, Round Rock, TX
(US); Timothy McDaniel, Florence,
BAKER BOTTS L.L.P.
98 SAN JACINTO BLVD., SUITE 1500
AUSTIN, TX 78701-4039 (US)
(21) Appl. No.: 11/464,127
(22) Filed: Aug. 11, 2006
Related U.S. Application Data
(63) Continuation-in-part of application No. 10/722,954, filed on Nov. 26, 2003, and which is a continuationin-part of application No. 09/971,170, filed on Oct. 4, 2001, which is a continuation-in-part of application No. 09/267,254, filed on Mar. 12, 1999, now Pat. No. 6,457,038.
(60) Provisional application No. 60/429,756, filed on Nov. 27, 2002. Provisional application No. 60/480,626, filed on Jun. 23, 2003. Provisional application No. 60/078,645, filed on Mar. 19, 1998. Provisional application No. 60/099,434, filed on Sep. 8, 1998.
(51) Int. CI.
G06F 15/16 (2006.01)
(52) U.S. CI 709/209
A field asset suitable for use in a machine to machine environment includes a machine controller configured to function as a master of a shared bus (e.g. an MDB bus) and one or more slave peripheral devices connected to the bus. The field asset includes a snoop agent to capture packets transmitted on the shared bus. The snoop agent may be implemented as a microcontroller coupled to the MDB bus via a UART and isolation circuitry and controlled by appropriate packet capture firmware. The microcontroller may capture and buffer captured data and send the buffered data to a snoop application module. The application module may be implemented as part of an extended function adapter including an embedded processor in communication with the microcontroller.