Patent ID: 7394775
Filing Date: 2008-07-01
Classification: H04L

Abstract:
1. A distributed system for acquiring remote data in packets with a communication protocol optimizing the transmission speed, particularly applicable to the follow-up and control in an automotive vehicle of the values of signals provided by a series of transducer devices distributed in different parts of the vehicle and which follow different analog or digital values, characterized in that: said transducer devices are associated to respective slave/subordinate circuits which are connected, through a single, time-shared serial communications bus, to a master/main circuit, which in turn is connected to a digital processing unit through a parallel bus, each one of said slave circuits and master circuit being provided with a respective digital processor and a respective transceiver device, and which master circuit is provided so as to perform, upon petition of an activation by said unit, a repetitive or non-repetitive consultation, setting up communication with each one of the slave/subordinate circuits according to a communication protocol without error correction which includes a series of bit packets, each one of which comprises: a start bit with a longer duration/length than the data bits so that it is fully identified; 1.5 delay/synchronism bits for the frames going from master to slave; one or more address bits, indicative of the slave/subordinate circuit to be consulted; and several data bits containing information coming from the consulted slave/subordinate circuit.