A method and device for multi-connection of microprocessor ports

Abstract

The invention discloses a microprocessor port multiple-series method. According to the method, a common port connector, an Ethernet adaption serial port chip and an RS232 chip are connected with a common serial port of a central processing unit (CPU) of the system to receive / transmit information, and the information transmitted from the Ethernet and the RS232 chip is isolated through an isolation system consisting of diodes and is independently transmitted to the Ethernet or the RS232 chip. The multiple-series device comprises a main CPU of the system, an Ethernet adaption serial port chip, an RS232 chip and a common port connector, wherein the common port connector is connected with the CPU of the system through a circuit; a plurality of chip pins are arranged on the common port connector; and in two chip pins, one chip pin is used for transmitting data to the main CPU of the system, and the other chip pin is used for receiving data for the main CPU of the system. The Ethernet and the RS232 chip share a group of serial ports of the CPU, and the resources occupied by the CPU are greatly reduced, so that the operating efficiency is high.

Description

technical field [0001] The invention relates to a microprocessor port multiple connection method and a device for the multiple connection method. Background technique [0002] At present, the Ethernet-to-serial port needs to occupy a set of serial ports of the system CPU, and the RS232 interface also needs to occupy a set of serial ports of the system CPU, and the two cannot be shared. The system CPU needs to provide two sets of serial ports. Increase, the cost of the selected CPU is further increased. Contents of the invention [0003] The invention proposes a method and device for multi-connection of microprocessor ports, which solves the problem of multiple serial ports occupying CPU resources in the prior art, realizes the function that the Ethernet serial port and RS232 share one serial port, and greatly reduces the occupied resources of the CPU. [0004] Technical scheme of the present invention is realized like this: [0005] A microprocessor port multi-connection...

AI Technical Summary

Problems solved by technology

[0003] The present invention proposes a microprocessor port multi-connection method and device, which solves the problem of multiple serial ports occupying CPU resources in the prior art, realizes the function of sharing one serial port between the Ethernet serial port and RS232, and greatly reduces the occupied resources of the CPU

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