Monitoring and analyzing device and monitoring and analyzing method for serial port interaction data based on system control flow

The invention belongs to the technical field of data transmission monitoring, and particularly relates to a monitoring and analyzing device and a monitoring and analyzing method for serial port interaction data based on system control flow. The invention connects a data transfer device between two communication devices which communicate with each other in the system control flow through a three-way cable to judge the timing of the data transmitted between the two communication devices and the data correctness, and determines a source of fault by combining a communication protocol. Aiming at the problem that the monitoring means in the old equipment is not perfect, the monitoring and analyzing device and monitoring and analyzing method make appropriate improvement on the basis of commonly used test tools (such as a laptop, a serial debugging device, and a debugging cable) in the laboratory, and monitor the integrity and correctness of the data during the communication process between the devices through record