JPS62177637A - Simulation result display method - Google Patents

Abstract

PURPOSE:To display the simulation results obtained an interactive way or in a batch in the form of a logic chart that can be easily understood by a designer, by combining the logic values contained in both method and result tables. CONSTITUTION:When data are inputted from a data input device 10, a logic chart editing processor 11 edits a logic chart and stores it in a drawing information table 12. Then a connection information extracting processor 13 extracts the connection relation between logic elements in a logic chart. At the same time, a logic simulator 17 converts said connection relation into a practicable data form to store it in a logic information table 16. The simulator 17 stores the simulation results in a result table 18. The combination between the simulation results of the table 18 and the display methods of a method table 19 are supplied to a display control part 14 together with the logic drawing information on the table 12 through a result display processor 30. These combination and information are displayed on a graphic display 15. Thus it is possible to display the simulation result in the form of a logic chart that can be easily understood by a designer.

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a method for displaying results of logical simulation,
In particular, the present invention relates to a result display method suitable for comparing and determining a logic diagram to be simulated and a simulation result.

(Background of the Invention) The conventional logic simulation result display method is a method in which the vertical axis is the element name or signal name, and the horizontal axis is time, and the way the resulting logical values change over time is displayed in a printed list. In this method, in order to trace how a certain signal changes, ■ Find the tracking point in the logic diagram created by the designer.■ Find the signal you want to trace from among the signal names in the simulation result print list. When dealing with large-scale logic circuits such as LSIs, the number of signal lines can reach several thousand, and it takes a lot of time just to find the tracking point. Therefore, there was a problem in that more time was required to judge the simulation results.

An example of a logic diagram is shown in FIG. 1, an example of a simulation result is shown in FIG. 3, and an example of a result display according to a conventional method corresponding to the content is shown in FIG.

1 in FIG. 1 indicates an input terminal, and 2 indicates a logic gate. Also, LL, L2... are the names of signal lines, and L in Figure 2.
It corresponds to L, L2...

X, H, and L in FIG. 2 are the logical values of the execution results of the logical simulation, and indicate that they are different values.

[Purpose of the invention]

An object of the present invention is to eliminate the drawbacks of conventional methods and to provide a result display method that expresses the results of interactive or batch simulation in the form of a logic diagram that is easy for designers to understand.

[Summary of the invention]

In order to achieve the above object, the present invention is characterized in that when displaying the simulation results, logic states are displayed using logic diagrams of elements such as gates and signal lines. The display is characterized by a combination of logical values in a method table that stores designations of display methods (colors, line types, etc.) and a result table that stores simulation results.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 4 is an overall block diagram showing an embodiment of the present invention.

In FIG. 4, 10 is a data input device, such as a keyboard or a tablet. 11 is the logic diagram editing process,
The logical diagram is edited according to data input from 10 data input devices, and the results are stored in 12 drawing information tables. At the same time, the results are displayed as a logic diagram on 15 graphic displays by 14 display control units.

The connection relationships between the logic elements in the logic diagram are extracted from the drawing information table by connection information extraction processing No. 13, converted into a data format executable by the logic simulator No. 17, and stored in the logic information table No. 16.

The 17 logic simulators store their simulation results in 18 result tables. 20 is a result display process, in which the display method stored in the method table 19 and 18
The combination of values in the result table and the logical drawing information stored in the drawing information table 12 are input to the display control section 14, and the simulation results are displayed as a logical drawing on the graphic display 15.

5 and 6 are display examples of simulation results showing an embodiment of the present invention.

FIG. 7 is a diagram showing an example of a method table showing an embodiment of the present invention. In the figure, H, L, and X represent logical states obtained by executing the logic simulator.

Furthermore, this table allows specifying the display method of simulation results corresponding to each logical state. In this embodiment, the display method is specified by a line type for drawing a logical diagram, such as a thick line or a broken line, but it can also be specified by a single color. FIG. 4 and FIG. 955 are examples of displaying the example simulation results shown in FIG. 3 according to the example contents of the method table shown in FIG. 7.

These correspond to the states at times tt and tz in FIG. 3, respectively. The state at which time in simulation result table 8 is to be displayed can be instructed from the data input device 10. Further, the contents of the method table No. 19 can be changed in the same way.

〔Effect of the invention〕

As explained above, according to the present invention, the results of logical simulation can be displayed in the form of logical diagrams that are easy for designers to understand, so it is possible to completely correlate the simulation results with logical diagrams, and This has the effect of allowing quick judgment.

[Brief explanation of drawings]

Fig. 1 is an example of a logic diagram, Fig. 2 is an example of displaying simulation results using a conventional method, Fig. 3 is an example of waveform display of the contents of Fig. 2, and Fig. 4 is an overall block diagram showing an embodiment of the present invention. , FIG. 5, and FIG. 6 are diagrams showing simulation result displays showing an example, and FIG. 7 is a diagram showing an example of a method table showing an example. DESCRIPTION OF SYMBOLS 10... Data input device, 11... Logic diagram editing process, 12... Drawing information table, 13... Connection information extraction, 14... Display control unit, 16... Logical information table, 17 Logic simulator, 18 Result table, 19 Method table, 20 Result display processing. No. / Kuchimaki 2 Kuchi Nobuko b 6″ -B horizontal No. 4 No. 50

Claims (1)

[Claims] An editing process for editing a logic diagram, a drawing information table for storing editing results, a logic simulator for simulating a logic circuit, a logic information table for storing logic connection information serving as the input information, and a result of the logic simulation. In a logical simulation device, the simulation results are displayed in a form on a logical diagram. When performing this, the shape is calculated using the logical value of the logical simulation result,
A simulation result display method characterized in that determination is made based on a combination of contents of a result table.