Atmel Nantes Sa

Jean-Sebastien Berthy

Thierry Delalande

Marc Laurent

Laurentiu Birsan

A process for automatically detecting and configuring with the throughput of a network, in which a device: (a) goes into a listen mode; (b) obtains a triplet of successive transitions in a transmitted signal, the triplet delimiting first and second signal levels, one dominant and the other recessive; (c) measures the duration of each of the first and second levels; (d) as a function of the measured durations, obtains a new throughput configuration by determining values for parameters that define a bit length L; (e) validates the new throughput configuration; (g) if at least one throughput adaptation condition is verified, goes into a normal mode, otherwise obtains a next transition of the signal, which delimits with the last previous transition a new level of the signal, then measures the duration of the new level and reiterates steps (d) to (g) taking account of the new signal level.

Process for automatically detecting the throughput of a network, particularly of the can bus type and for configuring with the detected throughput by transition analysis, and corresponding device

A method for automatic detection of the network data rate and for configuration at the detected data rate by a device connected to the network. This method includes an initialisation phase and an interative processing phase. The initialisation phase includes the following steps: the device is put into listening mode, in which it can receive messages from the network but it cannot send messages on the network; the device is initialised with an initial data rate configuration; a first timeout is started. The iterative processing phase comprises the following steps for each iteration: if at least one data rate adaptation condition is satisfied, the iterative processing phase is interrupted, the current data rate configuration is validated and the device is put into normal mode; if at least one data rate non-adaptation condition is satisfied or if the first timeout elapses without a data rate adaptation condition or a data rate non-adaptation condition being satisfied, the first timeout is reinitialised and the current data rate configuration is replaced by a new data rate configuration obtained by using a mechanism for obtaining several possible data rate configurations without knowledge of a clock frequency fof the device and without any assumption about the network data rate.

Method for automatic detection of the data rate in a network, particularly a CAN bus type network, and for configuration to the detected data rate, corresponding device

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Petit-Mars, France

Jean-Sebastien Berthy