A non-time-division port multiplexing method and device

Abstract

The invention provides a non-time-sharing port multiplexing method and device. A microprocessor MCU is set, and a port is allocated on the MCU to connect with a main control device, which is called a main control port, and a corresponding port is allocated to each peripheral device. The port is connected, called the peripheral port, and the port data flag is preset for each peripheral port; when the master control device sends data to each peripheral device, the "port data flag" of the corresponding peripheral port is added in front of the sent data; MCU Determine whether the master control port has received data, if yes, judge whether the data received by the master control port is an instruction, if it is a configuration instruction of the port, execute the configuration instruction and store the parameters, if it is a reset instruction, reset the MCU directly, otherwise according to the received The "port data flag" carried in the data determines the destination peripheral port for data transmission and forwards it; when the peripheral port receives the data, it adds a "port data flag" to the data header and forwards it to the master port.

Description

Technical field [0001] The invention relates to the technical field of communication devices, in particular to a non-time-sharing port multiplexing method and device. Background technique [0002] In data communication, we often encounter situations where the main control device needs to communicate with multiple peripheral devices at the same time, and the number of communication ports on the main control device is limited, and multiple peripheral devices cannot be connected at the same time. For example: 1. The CPU of the GNSS terminal (Global Navigation Satellite System) needs to be connected with GNSS receivers, radios, Bluetooth, GPRS (General Radio Packet Service), computers and other devices. Each device needs one or two serial ports, and the CPU It is difficult to provide so many serial ports; 2. Bluetooth devices are currently widely used, and MCU or CPU connects to peripheral serial devices through Bluetooth devices. A Bluetooth device can only connect to one serial por...

AI Technical Summary

Problems solved by technology

[0002] In data communication, such a situation is often encountered: the main control device needs to communicate with multiple peripheral devices at the same time, but the number of communication ports on the main control device is limited, and it is impossible to connect multiple peripheral devices at the same time

For example: 1. The CPU of the GNSS terminal (Global Navigation Satellite System) needs to be connected with GNSS receivers, radios, Bluetooth, GPRS (General Packet Radio Service), computers and other devices. Each device needs one or two serial ports, and the CPU It is very difficult to provide so many serial ports; 2. Bluetooth devices are widely used at present, and MCU or CPU connects peripheral serial devices through Bluetooth devices. A Bluetooth device can only connect to one serial peripheral device, and it cannot connect

This greatly limits the usability of bluetooth

Previously, there was also a device to solve the problem of serial port multiplexing, but it used the principle of time-division multiplexing of analog switches. At a time, only one peripheral device can communicate with the main control device. Once this time slice is missed, Then the data will be lost, and only serial devices can be connected, which cannot really solve the problem of port multiplexing

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