JPS61270953A - Line information display device - Google Patents

Abstract

PURPOSE:To receive the data in various types of communicating conditions with small- sized hardware by receiving the data with the exclusive-use hardware before synchronization is established, and receiving with an LSI for communication which can set various types of communicating conditions while the synchronization is established. CONSTITUTION:An LSI101 for communication is a circuit which can set respective types of the communicating conditions (HDLC, SYN synchronization, start stop synchronization, etc.), and a line information receiving part 102 receives the line information before the establishment of the synchronization which the LSI101 cannot receiving part 102 receives the line information before the establishment of the synchronization which the LSI101 cannot receive and sends always to an information selecting part 106 at the character unit. A timing generating part 104 sends the timing signal to respective parts, a line condition detecting part 103 detects whether or not the present condition is during the establishment of the synchronization, and sends a selecting control signal 3 to the information selecting part 106. At the selecting part 106, the output of the receiving part 102 is selected before the establishment of the synchronization, the output of the LSI101 is selected during the establishment of the synchronization, and the outputs are sent to a line information displaying part 107 and a line information storing part 108.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a line information display device for receiving, displaying and storing line information.

Prior Art FIG. 3 shows the configuration of a conventional line information display device. 301
is an HDLC data reception section, 302 is a SYN synchronization data reception section, 303 is an asynchronous data reception section, 304 is a basic timing generation section, 305 is a synchronization method selection section, and 306 is a synchronization method that selects any of the received information from 301 to 3. Or,
307 is a main control unit for writing and reading selected information to and from 307 and 308, 307 is a line information display unit, and 308 is a line information storage unit.

In FIG. 3, a basic timing generation section 304 sends a reception signal to 301 to 303 for receiving the synchronization format data determined by the output of the synchronization method selection section 305. 301 to 3 each receive line information, and the received data is sent to the control unit 306. Various statuses resulting from the reception (parity check, CRC check, synchronization code reception, idle state, abort, etc.) are also sent to the control unit 306 at the same time. The control unit 306 is the synchronization method selection unit 30
Select the information and status sent from 301 to 3 according to the synchronization method instructions in 5, and display the line information display section 307.
By sending the information to the line information storage unit 308, the line information can be displayed and stored.

Problems to be Solved by the Invention This type of device is required to display all information including periods in which line synchronization is not established, and to handle data of various synchronization methods. When handling data of various synchronization methods, using a commercially available communication LSI has the advantage of having a simple hardware configuration and being versatile. However, when the LSI is used, information other than when synchronization is being established cannot be captured. In addition, HDLC cannot receive and display all information due to the inability to import FCS data, etc. Therefore, in the past, dedicated hardware for receiving line data was prepared for each synchronization method. By switching these, information reception under various communication conditions was handled.Therefore, there was a problem in that as the communication conditions increased, the amount of hardware increased proportionately.

The present invention solves the above conventional problems, and provides a line information display device that can accommodate various communication conditions with a small-scale hardware configuration without having a dedicated circuit for each synchronization method. It is.

Means for Solving the Problems In order to achieve the above object, the present invention uses a communication LSI that can set various communication conditions (synchronization format, synchronization code, word length, etc.) to establish synchronization. data other than that during synchronization is received using dedicated hardware.
Furthermore, by using a circuit that determines and switches between the former and the latter data to be received and displayed depending on the line status, and by combining the above circuits, data that is being synchronized on the line and data that is not being synchronized are displayed. It detects which side of the data is flowing, determines whether to import data from the communication LSI or data from the dedicated hardware, and by switching between these, all data on the line is captured. .

Effects According to the present invention, it is possible to completely import communication data of various synchronization methods, including portions for which synchronization has not been established, with a small amount of hardware compared to conventional systems, and as a result, it is possible to import communication data of various synchronization methods, including portions for which synchronization has not been established. Line information can be displayed and stored.

Embodiment FIG. 1 shows an embodiment of the present invention. 101 is a general-purpose communication LSI (Large Scale Integrated Circuit), 102 is a line information receiving unit that constantly receives line information, 103 is a line status detection unit, 104 is a timing generation unit, 105 is a synchronization method selection unit, and 106 is an information Selection section, 107 is line information display section, 1
08 is a line information storage unit. The operation will be explained below according to FIG. The communication LSI I0I can receive data according to the line data synchronization format by selecting HDLC%SYN synchronization, start-stop synchronization, etc. The data received by the LSI10I is data from synchronization establishment to release, and has a function of outputting a synchronization code detection signal 2 every time a synchronization code is received. Line information receiving section 1
02 is used to receive line information of a portion where synchronization has not been established and cannot be received by the communication LSI I0I, and always receives line data in units of character length and sends it to the information selection section 106.

The data received by the communication LSI I0I and the line information receiving unit 102 are switched and used depending on the conditions, so each time the communication LSI I0I receives a synchronization code, the communication LSI I0I
The line information receiving unit 102 receives the synchronization detection signal from 0I.
The reception timing of is corrected to be synchronized with the reception timing of the communication LSI. The line state detection unit 103 detects whether the circuit 1 is in the current state or not.
Generates a signal for switching data sent to 07-8. Based on the signal, the information selection section 106 selects the received information and sends it to the line information display section 107 and the line information storage section 107. By adopting the above configuration, it is possible to read and display line information of various types of synchronization formats, and to store it at the same time using simple hardware.

FIG. 2 shows an example of the signals of each part when HDLC data is flowing on the line. The numbers assigned to the signals correspond to the signal numbers in FIG.

Effects of the Invention As is clear from the above embodiments, the present invention provides a communication LS
By using a configuration in which the missing functions are supplemented with dedicated hardware and switching between the two is achieved, a variety of communication conditions can be achieved with a smaller hardware configuration compared to a conventional configuration in which each synchronization method has its own dedicated circuit. It becomes possible to correspond to

[Brief explanation of drawings]

FIG. 1 is a block diagram of a line information display device according to an embodiment of the present invention, FIG. 2 is a timing diagram of the same device, and FIG. 3 is a block diagram of a conventional line information display device. 101... Communication LSI, 102...
Line information receiving unit, 103... Line status detecting unit,
104... Timing generation section, 105...
...Synchronization method selection section, 106... Information selection section,
107... Line information display section, 108...
・Line information storage unit. Name of agent: Patent attorney Toshio Nakao and one other person Figure 1

Claims (1)

[Claims] Among the line information, a first receiving means receives an information signal of a period in which synchronization is established, a second receiving means receives line information other than the above information, and a second receiving means for selecting the two types of information. Information for writing and reading information between a line state detection means that outputs a selection signal according to the line state, and a line information storage means and a line information display means that selects the two types of information based on the selection signal. A line information display device that has a selection means and a timing generation means that generates a timing for receiving information, and receives, displays, and stores communication information of various synchronization methods on a line.