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Control circuit and method of serial port equipment

A device control and serial port technology, applied in the direction of electrical digital data processing, instruments, etc., can solve the problems of RS232 control network circuit complexity, high implementation cost, unfavorable cost control, etc., to achieve easy implementation, reduce control cost, and simplify hardware circuits Effect

Inactive Publication Date: 2008-12-10
SHENZHEN COSHIP ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0004] Using the above technical solutions to build RS232 control network circuits is too complicated, and the implementation cost is high, which is not conducive to cost control

Method used

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  • Control circuit and method of serial port equipment
  • Control circuit and method of serial port equipment
  • Control circuit and method of serial port equipment

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Embodiment Construction

[0017] refer to figure 2 The present invention proposes the first embodiment. In the serial device control circuit, the host 101 is used as the control host, and multiple serial devices such as device 1, device 2, and device N are used as controlled devices, and share a group of transmission buses TXD (output bus) and RXD (input bus) communicate with the host computer 101 to establish a serial device control circuit. The TXD bus transmits the control command sent by the host 101 to the serial device, and the RXD bus transmits the information sent by the serial device to the host 101 .

[0018] Since the RXD bus transmits the information sent by multiple serial devices to the host 101, it adopts positive logic. In order to prevent mutual interference when sending information between multiple serial devices, this embodiment proposes to use a unidirectional conduction device to shield the interference. Specifically, in this embodiment, diodes are used as unidirectional conduct...

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PUM

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Abstract

The present invention provides a serial device control circuit, which comprises a host computer and at least a serial device. The common input bus and the common output bus of at least one serial device are communicated with the host computer; the input terminal of at least one serial device is respectively connected with the output bus and the output terminal is respectively connected with the input bus through a one-way guide circuit device. The present invention also provides a serial device control method. The serial device control circuit provided by the present invention is suitable for the control network consistent with RS232 standard serial device, thus achieving the monitoring of multi-serial-device network, simplifying the hardware circuit of the serial device control network, reducing the control cost of the serial device, which is stable, reliable and can be implemented easily.

Description

technical field [0001] The invention relates to the field of basic electronic circuits, in particular to a serial device control circuit and a control method. Background technique [0002] In order to connect multiple serial devices conforming to the RS232 standard to the same host computer, it is generally necessary to set up a control circuit network. The prior art generally adopts expanded input and output interface devices to select and control multiple serial devices, so that multiple serial devices share the same bus to exchange information with the host. [0003] figure 1 An existing technical solution is shown. The input and output interface device 200 includes a processing unit 201 and an input and output interface 202. The processing unit 201 is connected to the host 100. The input and output interface 202 includes multiple ports. Device 1, device 2 and device N are all It is a serial port device conforming to the RS232 standard, which is respectively connected t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F13/40G06F13/42
Inventor 郭先概
Owner SHENZHEN COSHIP ELECTRONICS CO LTD
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