Multipath serial communication controller and multipath control method thereof

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...

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 RS422 / 485 to RS232 electrical interface control, and cannot realize serial port multi-channel to single-channel control

At present, there is no multi-channel serial communication controller product in the market, and multi-channel serial communication controller equipment is an important technical topic at present.

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