Patent ID: 7929461
Filing Date: 2011-04-19
Classification: H04L

Abstract:
1. A method of measuring bus traffic on a controller area network (CAN), for use in an oscilloscope, comprising the steps of: acquiring, with said oscilloscope, a CAN bus signal in the form of a waveform in realtime; converting the waveform into a bitstream; analyzing the bitstream to measure bus occupancy on the CAN; and displaying a representation of said waveform and a graphical indication of said bus occupancy on a display screen of said oscilloscope; wherein the analyzing step comprises the steps of: converting the bitstream into CAN protocol messages; identifying a start time and a stop time for each CAN protocol message; computing the bus occupancy as a function of an amount of time within the bitstream occupied by the CAN protocol messages determined between a start and a stop time for each CAN protocol message in the bitstream and of total time determined between the start time of a first CAN protocol message in the bitstream and the end time of a last CAN protocol message in the bitstream.