Distributed system and method for the remote acquisition of data in packets with a communication protocol which optimizes the transmission speed

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 (1, 2, 3, 4) distributed in different parts of the vehicle and which follow different analog or digital values, characterized in that said transducer devices (1, 2, 3, 4) are associated to respective slave/subordinate circuits (10, 20, 30, 40) which are connected, through a single, time-shared serial communications bus (60), to a master/main circuit (50), which in turn is connected to a digital processing unit (DP) through a parallel bus (70), each one of said slave circuits (10, 20, 30, 40) and master circuit (50) being provided with a respective digital processor (SLV1, SLV2, SLV3, SLV4, MST) and a respective transceiver device (11, 21, 31, 41, 51), and which master circuit (50) is provided so as to perform, upon petition of an activation by said unit (DP), a repetitive or non-repetitive consultation, setting up communication with each one of the slave/subordinate circuits (10, 20, 30, 40) according to a communication protocol without error correction which includes a series of bit packets (P1, P2, P3, P4), each one of which comprises:

• a start bit (START) with a longer duration/length than the data bits so that it is fully identified;
• 1.5 delay/synchronism bits (SYNC) for the frames going from master to slave;
• one or more (according to the number of slave devices present in the system) address bits (A1, A0), indicative of the slave/subordinate device (10, 20, 30, 40) to be consulted;
• and
• several data bits (D0 . . . Dn) containing information coming from the consulted slave device (10, 20, 30, 40).