PSI5 signal simulation device based on FPGA processor

Abstract

The invention relates to a PSI5 signal simulation device based on an FPGA processor, and the device comprises a power module, a communication interface, the FPGA processor, a synchronization pulse threshold setting module, a synchronization pulse recognition module, a current setting module, a current signal output module, a fault injection module, and a sensor interface module. The synchronous pulse identification module is connected with the sensor interface module through the fault injection module; the power supply module is used for accessing a vehicle-mounted storage battery to convert the voltage into various digital voltages required by the device; the synchronous pulse threshold setting module is electrically connected with the synchronous pulse identification module, and the synchronous pulse identification module is used for receiving a synchronous pulse sent by the ECU, comparing the synchronous pulse with a threshold voltage of the synchronous pulse threshold setting module and then outputting a TTL level to the FPGA processor; the current setting module is electrically connected with the current signal output module, and the current signal output module is used for outputting the signal current set by the current setting module to the sensor interface module. Therefore, the ECU simulation test can be realized at low cost.

Description

technical field [0001] The invention belongs to the technical field of controller simulation testing, and in particular relates to a PSI5 signal simulation device based on an FPGA processor. Background technique [0002] The PSI5 (Peripheral Sensor Interface) protocol is an open standard based on the existing sensor interface for peripheral airbag sensors and has been verified in millions of airbag systems. Data from this sensor can be transmitted both synchronously and asynchronously via a two-wire interface. The technical characteristics and low implementation cost of the PSI5 communication protocol make it suitable for many other automotive sensor applications as well. [0003] The sensor (Sensor) is connected with the ECU using a pair of twisted-pair wires. The power supply and bi-directional data transmission of the ECU to the sensor are completed through twisted-pair wires. The communication rate is 125kbps and 189kbps. When the sensor transmits data to the ECU, the ...

AI Technical Summary

Problems solved by technology

However, in reality, the simulation of the PSI5 protocol is difficult, and the electrical characteristics of the signal are relatively complex. Therefore, many simulation tests have to combine the mechanical structure with the real sensor to realize the test of the corresponding scene. More complicated, not conducive to ECU simulation test

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