Multipath serial communication controller and multipath control method thereof

A multi-channel serial port, multi-channel control technology, applied in the direction of instruments, electrical digital data processing, etc., can solve the problems of inability to realize multi-channel to single-channel control, data transmission errors, communication failures, etc.

Inactive Publication Date: 2009-04-01
北京国通创安信息技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If multiple hosts want to control a device through the serial port and send commands at the same time, data transmission errors will occur due to competition for the serial data line, resulting in communication failure
However, the existing serial port controllers can only realize simple single-channel RS4...

Method used

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  • Multipath serial communication controller and multipath control method thereof
  • Multipath serial communication controller and multipath control method thereof
  • Multipath serial communication controller and multipath control method thereof

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Embodiment Construction

[0034] The technical scheme adopted by the present invention to solve the technical problem is: the equipment is mainly composed of a serial port transceiver module, a microcontroller, a logic controller and a dial switch. Among them, the functions of the serial port transceiver modules are the same, responsible for receiving and sending serial port data, multiple can be set, and one of them is responsible for communicating with the controlled device. In the embodiment, 5 serial port transceiver modules are selected, 4 are specially responsible for communicating with different control hosts, and the other one is responsible for communicating with the controlled device. The microprocessor adjusts the working mode of the device by reading the state of the DIP switch, and determines which host communicates with the controlled device through the priority of the host port. The task of the logic controller is to realize the channel connection between the serial transceiver modules. ...

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Abstract

The invention discloses a multipath gorge communication controller which includes a communication port, a main control gorge receiving and transmitting module, a controlled gorge receiving and transmitting module, a dial-up switch, a microcontroller and a logical controller; wherein, the main control gorge receiving and transmitting module is respectively connected with the control host computers with different priorities; the controlled gorge receiving and transmitting module is connected with a controlled device; the logical controller is respectively connected with each gorge receiving and transmitting module; the logical controller is connected with the microcontroller and the dial-up switch in sequence. The invention also provides a multipath control method for multipath gorge communication. The method has the advantages of being capable of searching the states of a plurality of gorge modules in real time, detecting whether data passes or not and opening a signal path in time to transmit the data to the controlled device by adopting a priority mode and a non-priority mode and simultaneously supporting the electric interfaces of RS422/485and RS232. Simultaneously, the data error caused by the competition on the data lines by a plurality of host computers is avoided by setting the signal path delay time through the dial-up switch. The device is convenient to be used and is suitable for project mounting.

Description

technical field [0001] The invention relates to a control device, in particular to a multi-channel serial port communication controller and a multi-channel control method thereof. Background technique [0002] In some security projects, DVS (Digital Video Server) or other hosts often need to control a device (such as video matrix, PTZ, etc.) There will be competition. If multiple hosts want to control a device through the serial port and send commands at the same time, data transmission errors will occur due to competition for the serial port data line, resulting in communication failure. However, the existing serial port controllers can only realize the control of simple single-channel RS422 / 485 to RS232 electrical interface, and cannot realize the control of serial ports from multi-channel to single-channel. At present, there is no multi-channel serial communication controller product on the market, and the multi-channel serial communication controller device is an impor...

Claims

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Application Information

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IPC IPC(8): G06F13/38G06F13/42
Inventor 泰嘉黎
Owner 北京国通创安信息技术有限公司
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