The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 13, 2004
Filed:
Dec. 30, 1999
William J. Slivkoff, San Jose, CA (US);
Koninklijke Philips Electronics N.V., Eindhoven, NL;
Abstract
A method for use in a CAN device (e.g., a CAN microcontroller) that includes a processor core, for automatically transmitting an acknowledge message. The method includes the steps of receiving a frame of a multi-frame fragmented message, and automatically transmitting an acknowledgment message without requiring any intervention of the processor core, in response to the receiving step. The automatically transmitting step is preferably performed by hardware external to the processor core, e.g., a CAN/CAL module of the CAN device. In a preferred embodiment, the method includes the steps of setting up a first message object having an object number n as a receive message object, enabling the receive message object, setting up a second message object having an object number n+1 as a transmit message object corresponding to the receive message object, storing the acknowledgment message in a response message buffer associated with the transmit message object, receiving a frame of a multi-frame fragmented message, acceptance filtering the received frame to determine that the received frame matches the enabled receive message object, enabling the transmit message object, and automatically transmitting the acknowledgment message, without requiring any intervention of the processor core.