Monitoring device of point-to-point communication equipment and monitoring system having monitoring device of point-to-point communication equipment

Abstract

The invention provides a monitoring device of point-to-point communication equipment and a monitoring system having the monitoring device of the point-to-point communication equipment. The device comprises a first equipment interface which is connected with the communication interface of first communication equipment; a second equipment interface which is connected with the first equipment interface and the communication interface of second communication equipment; a data sampling module which samples the communication data between the first equipment interface and the second equipment interface; a data processing module which is connected with the data sampling module and processes the sampled communication data according to a preset communication protocol; and a communication module which is connected with the data processing module and external monitoring equipment and outputs the processed communication data to the monitoring equipment. The communication data of both sides of the point-to-point communication equipment are monitored through hardware and the monitored communication data are outputted so that modification of the software level and / or the hardware level can be avoided, the change of the communication data of the hardware level can be monitored and thus onsite debugging of the point-to-point communication equipment can be greatly facilitated.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to a monitoring device and a monitoring system of point-to-point communication equipment. Background technique [0002] Point-to-point serial communication is a communication method often used in the industry. Usually, there is no master-slave concept between the two parties in point-to-point serial communication, that is, the two parties in communication are in an equal relationship, or point-to-point serial communication is one master and many Slave device (the one-master multi-slave device cannot add a monitoring slave device that can receive all the information on the bus). Frequently used point-to-point serial communication devices include RS232 (Asynchronous Transmission Standard Interface), SPI (Serial Peripheral Interface, Serial Peripheral Interface) and IIC (Integrated Circuit Bus, Inter-Integrated Circuit) and so on. The point-to-point serial communication equipmen...

AI Technical Summary

Problems solved by technology

[0003] Although point-to-point serial communication equipment is easy to use, it is very inconvenient to debug because of its point-to-point characteristics.

The specific performance is the following three points: First, the two parties in the communication cannot guarantee that their respective programs are completely correct, so that they cannot quickly and accurately judge the wrong party when an exception occurs, because both parties in the communication cannot determine the error message sent by the other party when the error occurs. information

Among them, for the communication party using the operating system with a display device or a monitoring device, the wrong party can be judged by reading the file and then displaying the file, but this method is not accurate because it will be driven by software. The impact of the program, and the correct operation of the driver by the software personnel cannot be guaranteed

Second, various signal interferences are prone to occur in industrial sites, and bit errors are more likely to occur when the communication rate is high. At this time, troubleshooting is more difficult, and when the communication rate is high each time, if the communication rate is displayed in real time The rate will cause too much burden on the system, but if the data is read in time intervals, the matching of the sent and received data will not be guaranteed

Third, for a chip-level device without an operating system, debugging is even more inconvenient, because the device cannot output two channels of information at the same time

First of all, for the devices with operating systems in Solution 1, the software drivers of most systems are already written in the general library. Modifying the software drivers will greatly reduce the portability of the software. In addition, after the modification The software driver needs to be debugged many times to ensure that the data is sent and received accurately

Secondly, for devices without an operating system in Solution 2, replacing the chip or adding a display device will bring cost and hardware modifications, and will inevitably increase the size of the software, and this solution is not easy to carry out. On-site commissioning

In addition, the solutions described above are only applicable to devices that can change programs or hardware, and for most outsourced devices, this is almost impossible

Finally, both of the above solutions are software-level modifications that cannot detect changes at the hardware level, such as changes in signal interference

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