Adaptive communication system of automobile electronic device based on serial ports

Abstract

An adaptive communication system of an automobile electronic device based on serial ports is used for transmitting relevant information from a peripheral device to a vehicle-mounted core device. The system comprises a plurality of serial ports for inputting or outputting relevant information. Communication is conducted through the serial ports according to protocols. The adaptive communication system is characterized by comprising a serial port resource management layer providing different serial port resources in time-sharing mode, a protocol adaptation layer for managing the protocols of the peripheral device, a protocol analytic sheaf for analyzing a data field and a business processing layer for conducting relevant business processing. The system is provided to different peripheral devices to be used in time-sharing mode according to actual requirements, and a client can select through a remote monitoring platform or conduct selection through local operation of drivers on cars. The system can still be adapted to various peripheral devices under the condition of limited serial port resource, the vehicle-mounted system is adaptive to a collecting device supporting a plurality of serial ports, and good effects of saving development and maintaining cost are achieved.

Description

technical field [0001] The invention relates to the technical field of automobile communication, and more specifically refers to an adaptive communication system of an automobile electronic device based on a serial port. Background technique [0002] At present, the Internet of Vehicles technology is in full swing. An important role of the Internet of Vehicles is to remotely obtain various operating conditions of the vehicle with the help of modern developed wireless communication networks and numerous embedded vehicle sensor systems distributed on the vehicle. Carry out effective supervision or control on vehicles, so that the operation of vehicles can achieve positive effects such as safer, more comfortable and energy-saving. With the development of chip technology, high-end embedded processors with strong data processing capabilities, such as ARM11, are generally used. COTEX A8 chips are used as the core of embedded vehicle systems to collect data from numerous peripheral...

AI Technical Summary

Problems solved by technology

However, the number of serial port connections provided by the vehicle-mounted core equipment is limited, and often cannot fully meet the requirements

In order to enable the system to support more peripheral serial port data acquisition devices at the same time, the usual solution is to add serial port expansion devices, so that one serial port of the vehicle-mounted core device can be expanded into multiple serial ports, and there is also a vehicle-based off-the-shelf CAN bus, adding an expansion device that converts serial port data into CAN data, these methods require additional equipment and increase costs

In addition, there is another serial port expansion method based on the use of the 485 protocol for device networking. This is relatively common in access control security systems, but it needs to put forward some unified requirements for the protocols of each peripheral device. The above-mentioned vehicle data acquisition devices are generally provided by Provided by different manufacturers, it is difficult to unify the agreement

[0004] Considering that the peripheral devices of the serial port do not need to be in the working state at all times, the printer is not always printing, for example, the card reader is not always swiping the card, so the peripheral devices can be time-division multiplexed to achieve on-demand distribution, each useful In addition, the same type of equipment, such as IC card reader, has many types of equipment from different manufacturers, and their protocols are different. Different car buyers may choose different models of card readers. Without self-adaptation, a software version needs to be customized for each type of user, resulting in a lot of version programs and increasing software maintenance costs

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