JPH06231195A - Time chart edition device - Google Patents

Abstract

PURPOSE:To simplify the setting of a grid at the time of drawing various signals with dissimilar periods on a display. CONSTITUTION:A grid setting section 31 sets the proper periodical intervals at every signal to be drawn and a grid information storage section 17 stores them. When a signal to be editing object is designated on a display screen with a mouse 7 or the like, a grid width selection section 32 detects this to automatically select the periodical interval which is set corresponding to the designated signal, thus controlling the snap processing.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a time chart editing apparatus used for displaying and editing a time chart used for designing and verifying a logic circuit on a display screen such as a display.

[0002]

2. Description of the Related Art A logic circuit is composed of many logic elements and circuit elements having a complicated signal processing function. When designing such a logic circuit, its operation must be verified in advance. For this purpose, a device for simulating the output signal of the logic circuit by arithmetic processing and displaying the result on a display or the like, and for writing and editing various signals on the screen as necessary is used. FIG. 2 shows a block diagram of a conventional time chart editing apparatus used for such a purpose. This device has a configuration in which a logic simulator 2, a control unit 3, a storage unit 4, a graphic display 5, a keyboard 6, a mouse 7, a plot output unit 8 and the like are connected to a bus line 1. The logic simulator 2 includes an arithmetic processing unit that simulates the operation of a logic circuit and outputs the result. The graphic display 5 is a display device that displays the processing result of the logic simulator 2 and the like on the screen. The keyboard 6 and mouse 7 are used for display control and editing processing. The plot output unit 8 is a device including a printer or the like and printing out the plot drawing 9.

The control unit 3 is provided to control the editing operation of the apparatus. Further, the storage unit 4 is composed of a storage device for storing data required for editing and display processing. The control unit 3 includes a grid display unit 11, a snap processing unit 12, a time chart data processing unit 13, and a grid setting unit 14. For example, when an output signal of a logic element is to be drawn on the display screen, a polygonal line in which a high level and a low level are repeated is usually drawn. A grid is set to easily draw a polygonal line connecting a plurality of such vertices. The grid is a process for assisting the drawing work, which is set so that the apex of the signal always comes to a grid point set in advance on the screen.

That is, for example, when a vertex is arbitrarily designated on the screen using the mouse 7 or the like, even if the designated location is not exactly on the grid point, the designated vertex on the grid point is specified. It is possible to draw an accurate signal waveform by automatically moving. The grid display unit 11 draws a thin grid line on the screen to inform the operator of such grid points. Further, the snap processing unit 12 performs a process of moving the designated vertex to the grid point.
The time chart data processing unit 13 is a unit that performs data processing necessary for displaying each signal forming the time chart. The grid setting unit 14 is a unit that controls the setting operation when the operator sets grids at arbitrary periodic intervals.

The storage unit 4 is provided with a signal waveform storage unit 15, a display information storage unit 16, and a grid information storage unit 17. The signal waveform storage unit 15 is a unit that stores data regarding a signal waveform to be displayed on the graphic display 5. The display information storage unit 16 is a unit that stores conditions for setting the range and content of the signal to be displayed on the graphic display 5 from the data stored in the signal waveform storage unit 15. Grid information storage unit 17
Is a portion for storing the grid width information set by the grid setting unit 14.

FIG. 3 is an explanatory view of a method of displaying the time chart as described above. The signal waveform data 15-1 shown in the upper right of FIG. 3 is stored in the signal waveform storage unit 15 shown in FIG. In this example, signal names SIG1, SIG2 ... SIG
7 signals are stored. These signals are signals that switch to a high level or a low level with the passage of time. Therefore, the amount of the signal waveform data 15-1 is usually relatively large. Graphic display 5
If you try to display in, each waveform will be too small. Therefore, the display information 16-1 is prepared as shown on the left side of FIG. 3, the display range is limited, and the display screen 5-1 as shown on the lower side of the figure is displayed. The display information 16-1 includes the signal name at the top of the screen, the display start time, the display end time, and the like. The display start time and the display end time are information that determines the display range of the signal in the time axis direction. In addition to this, screen X
The display start position in the axial direction, the display start position in the Y axis direction, the display height per signal, and the like are included as display information.

Here, the operator moves the cursor 21 using a mouse or the like while looking at the display screen 5-1 and draws the signal SIG3 in this example on the screen, for example. At this time, if you move the cursor 21 to the position shown in the figure and click the mouse, the apex of
Accurately aligned with 2 to improve the work efficiency of the time chart. The grid width information 17-1 is data representing the intervals of the broken lines shown in this figure in units of time.

For example, it is assumed that the grid interval in the figure is set to 100 msec. In this case, the position of the cursor 21 shown in FIG.
It is assumed that 97 msec is specified. At this time, assuming that the snappable range is about one half of the grid interval, the data to be corrected by snapping can be obtained by the following equation (1). J = Floor (697/100 + 0.5) × 100 = 700 (msec) (1) In this formula, J is a correction value, Floor is a function that rounds down the decimal point, 100 is a grid interval, 69
7 is a vertex designated by the cursor, and 0.5 is a value indicating a snap range.

As can be seen from the display screen of FIG. 3, the signals SIG1, SIG2, SIG3 and the signal SIG4 have different inherent periodic intervals even for signals to be displayed on the same display screen. ing. That is, the signal SIG
4 is an output signal of a logic circuit that processes a signal in a cycle of, for example, 80 msec. In this case, when drawing the signal SIG4, it is preferable to change the grid interval from 100 msec to 80 msec.

FIG. 4 shows an explanatory view of such a grid width changing screen. In the conventional device, when changing the grid width, such a screen is displayed and the window 2
Change the grid width in 3 and set it. The grid setting unit 14 shown in FIG. 2 is a part for controlling the display of such a screen and the operation of the resetting process. FIG. 5 shows a screen explanatory diagram after the grid width is changed. As shown in the figure,
For example, for signals SIG2 and SIG4, another signal SI
When it is attempted to make the grid width different from G1 and SIG3, the grid width can be changed as shown in FIG. 4, and the grid width can be reset each time.

[0011]

By the way, in the above-described time chart editing process, for example, the signals to be edited include many kinds of signals that change at different unique periodic intervals. In such a case, when drawing these signals on the screen, it is necessary to display the grid width changing screen each time and change the grid width. However, such a setting process is relatively complicated, and in some cases, there is a problem in that a signal is drawn by forgetting such a grid width change and an edit error occurs.

Further, even if the output signal of the logic circuit changes at the same timing, there is also a signal that advances or lags a certain width in the time axis direction with respect to the reference timing. In such a case, it is necessary to provide a grid point for snapping the apex of the signal at a position shifted by a certain offset width with respect to the grid set for reference. In such a case, there is a problem that the work of changing the grid width becomes more complicated and the work of editing the time chart becomes more complicated. When verifying the edited and created time chart, it is necessary to compare and examine signals under various conditions and at various timings. However, it is not easy to make detailed comparisons of such signals with reference to large plots. Further, the work of cutting out the portions to be compared and arranging them side by side for comparison is also complicated.

The present invention has been made by paying attention to the above points, and simplifies the grid setting work, and it is not necessary to set the grid each time when drawing various signals. It is intended to provide. Still another object of the present invention is to cut out an arbitrary range of time chart data having complicated contents,
It is an object of the present invention to provide a time chart editing device capable of freely editing and outputting these.

[0014]

According to a first aspect of the present invention, a time chart is created and edited on a display screen by arranging a plurality of signals composed of broken lines connecting a plurality of vertices with reference to predetermined coordinates. In the case where each of the signals is drawn by designating the plurality of vertices, when the vertices of the signal are designated, a grid point in the vicinity of the designated location is automatically
A snap processing unit that moves the specified vertex, a grid setting unit that sets the grid points to a unique periodic interval for each signal to be drawn, and a unique grid corresponding to each signal to be drawn. When a signal to be edited is specified on a grid information storage unit that stores periodic intervals as grid width information and a display screen on which a plurality of signals are arranged and displayed, the grid information is specified by referring to the grid information. The present invention relates to a time chart editing device, which is provided with a grid width selection unit that controls a snap process by selecting a specific periodic interval set corresponding to a signal.

According to a second aspect of the present invention, in the grid width information, the unique periodic intervals and the positions shifted by a constant offset width from the provisional grid points set at the periodic intervals are provided.
The offset data for setting the actual grid points is included. A third aspect of the present invention is a display unit that displays a time chart showing the operation simulation result of a circuit element on a display screen, and a section designation that specifies a plurality of predetermined sections viewed in the time axis direction of the time chart. Section, a division control section that divides and edits the time charts of the plurality of designated sections side by side, and an output section that outputs display contents controlled by the division control section Regarding the device.

[0016]

In this device, the grid setting unit sets in advance a unique periodic interval for each signal to be drawn,
This is stored in the grid information storage unit as grid width information. When a signal to be edited is specified on the display screen using a mouse etc., the grid width selection unit detects it and refers to the grid width information to set the periodic interval set corresponding to the specified signal. To control the snapping process.
This eliminates the need to set the grid each time a signal with a different periodic interval is drawn. Further, if the setting of the offset width is automated, the effect will be higher. On the other hand, when a time chart showing the operation simulation result of the circuit element is displayed on the display screen, a plurality of predetermined sections viewed in the time axis direction are designated and cut out from the time chart. The cut out time charts are arranged in an arbitrary order and displayed on the display unit or printed out. This makes it easy to obtain the materials used for detailed comparison and examination of each part of the time chart.

[0017]

The present invention will be described in detail below with reference to the embodiments shown in the drawings. [First Invention] FIG. 1 is a block diagram showing an embodiment of a time chart editing apparatus of the present invention. The device shown in the figure has a bus line 1, a logic simulator 2, a graphic display 5, a keyboard 6, a mouse 7, and a plot output unit 8.
Are connected, and the configuration of these parts is similar to that of the conventional device. Further, the control unit 30 and the storage unit 4 are connected to the bus line 1 in this device. The configuration of the storage unit 4 is the same as that of the conventional device, and includes a signal waveform storage unit 15, a display information storage unit 16, and a grid information storage unit 17.

Here, the control unit 30 includes a grid display unit 11 similar to the conventional device, a snap processing unit 12,
In addition to the time chart data processing unit 13, a grid setting unit 31 and a grid width selecting unit 32, which are features of the apparatus of the present invention, are provided. The basic grid setting process itself of the grid setting unit 31 is the same as the conventional one. However, in the present invention, by the operation of the grid setting unit 31, it is possible to collectively set, for each of a plurality of signals, the periodic intervals unique to the signal. The grid width information set in this way is stored in the grid information storage unit 17.

FIG. 6 is an explanatory view of grid width information according to the present invention. As shown in this figure, the signal waveform data 15-
Reference numeral 2 is composed of a plurality of signal names and signal waveforms corresponding to these signal names, and this portion is the same as in the conventional device. However, in the device of the present invention, grid width information 17-1 is stored corresponding to each signal name. For example, in this example, the grid width information of the signal SIG1 is set to 100 msec, and the signal SIG2 is set to 80 msec.

FIG. 7 is an explanatory view of grid width information according to the present invention, which is another example of FIG. In this example, the signal waveform data 15-3 and the grid width information 17-1 are stored as separate table information. In this case, the signal waveform data 15-3 is provided with a pointer indicating which grid width information corresponds to each.
In addition, in this example, the grid width information 17-1 has numbers 1 and 2 associated with pointers, and is composed of two types of information having grid widths of 100 msec and 80 msec, respectively. According to the embodiment shown in FIG. 7, signals having the same grid width information are collectively controlled by one grid width information.

FIG. 8 shows an explanatory view of the grid width information setting screen as described above. As shown in the figure, when setting the grid width, a window 24 as shown in the figure is displayed, and for each signal, for example, in this example, the signals SIG1 to S
Up to IG7, the cursor 21 can be used to specify the target, and the grid information, which is a unique periodic interval, can be set. As described above, all the grid width information for each signal is stored in the device in advance. When the operator specifies the signal to be edited in the subsequent processing, the grid corresponding to that signal is automatically set. This is because the information is selected and the operation of determining the grid points is performed.

FIG. 9 is an explanatory view of a method of displaying a time chart according to the present invention. As shown in the figure, also in the device of the present invention, the signal waveform storage unit 15 shown in FIG. 1 uses the signal waveform data 1 for seven types of signals SIG1 to SIG7
Memorize 5-2. Then, according to the display information 16-1 stored in the display information storage unit 16, the signal waveform data 15-
A part of 2 is taken out and displayed on the graphic display 5. The content itself of this display information is similar to that of the conventional device. Here, in the device of the present invention, the display screen 5
The interval of the grid points displayed at -1 is the signal S currently being drawn.
For IG3, preset grid width information 31-
It is automatically controlled to become 1.

Here, as shown in the figure, for example, while drawing the signal SIG3 using the cursor 21,
It is assumed that the cursor 21 is moved to switch to the drawing of the signal SIG2. At this time, the cursor 21 changes to the signal SI.
It is moved to the area where G2 should be drawn. At this time, the grid width selection unit 32 shown in FIG. 1 detects the movement and determines which signal is designated as the next drawing target.

This determination is based on the following equation (2), for example. (Py-Dy) / Sh = (70-18) /20=2.6 (2) In this formula, Py is the Y coordinate of the cursor, and Dy
Is the display start position, and Sh is the display height per signal. For example, when Py is 70, Dy is 18, and Sh is 20, the answer is 2.6, as shown in equation (2). If you round up this, the answer will be 3. Therefore, it can be determined that the cursor 21 is present on the third signal from the top in the display screen 5-1 of the display. Using this result, the grid width information of the corresponding signal is selected from the grid width information 31-1. This eliminates the need for the operator to input and switch the grid width information each time the signal is drawn.

FIG. 10 shows an operation flowchart of the apparatus of the present invention. The device of the present invention specifically operates according to the procedure shown in this figure. First, in step S1, the grid width setting screen is displayed. This screen is the screen described with reference to FIG. Next, in step S2, the grid width is set for each signal. This is based on the procedure described above with reference to FIG. When the input of such grid width information is completed in step S3, the grid width information is stored in the grid setting unit 3
1 is sent to the grid information storage unit 17 and stored in association with each signal. Then, in step S4, the time chart edit screen is displayed. From this point, the editing process of the time chart is started using this screen.
Here, an edit command for editing is input in step S5. An edit command is an instruction for drawing, erasing, or coloring a signal.

In step S6, it is determined whether an end command has been input. If the end command is input, the process ends. If another command is input, the process proceeds to step S7. First, the cursor position is detected in the manner described above. In step S8, the signal to be edited is determined by detecting the cursor position. Further, in step S9, the grid information is referred to and the grid width corresponding to the corresponding signal is selected. As a result, lattice points are given at the unique periodic intervals set for the signal, and the snap processing by the snap processing unit 12 becomes possible. In step S10, an edit command is executed thereafter. If this is a drawing command, the snap processing is executed as described above.

[Second Invention] FIG. 11 is an explanatory view of a grid having an offset. Even if the output signals of the logic circuits are signals having the same periodic intervals, there are some signals that are out of phase with each other in the time axis direction. Such a shift is called an offset here. In this figure, for example, the signal SIG1 is a grid point 2 every 100 msec.
3-1. The same applies to the signal SIG2, but the position of the grid point is shifted in the time axis direction by, for example, 40 ms later than the grid point 23-1 of the signal SIG1. It is preferable that such a signal can be easily drawn by the snap processing as described above.

FIG. 12 shows an explanatory view of a setting screen for setting the conventional offset as described above. As shown in the figure, in this setting screen, the grid width and the offset data are set when the grid width information is set. In this example, the grid width is 100 ms and the offset data is 4
It is set to 0 msec. However, since the above setting involves not only the grid width but also the input of the offset data, it is troublesome to set the grid width information every time the signal to be drawn is switched as in the conventional case.

Therefore, according to the apparatus of the present invention, it is possible to collectively set the offset as follows.
FIG. 13 shows a setting screen explanatory view according to the present invention. As shown in this figure, in this example, signal names SIG1, SIG2 ... S
Corresponding to IG7, a window 26 is displayed so that the grid width and offset can be set respectively.

FIG. 14 is an explanatory view of grid width information according to the present invention. As shown in this figure, in this embodiment, the grid width and offset are added to the signal waveform data in correspondence with the signal name. With the above settings,
When a signal to be drawn is specified using the cursor, grid information including offset is selected at the same time, and the actual grid point is set at a position shifted by a fixed offset width from the preset temporary grid point. To do.

When such an offset is set, for example, the grid width is 100 msec and the offset is 4
When the time is 0 msec and the cursor is moved to the 697 msec portion and clicked as in the example shown in FIG. 9, the following correction value J is obtained. J = Floor (697-40) /100+0.5) × 100 + 40 = 740 msec (3) By such correction, the actual grid point is located at a position shifted by the offset width from the grid point set by the grid width. It is set, and the specified vertex moves automatically there.

The first invention is not limited to the above embodiment.
The configuration of the screen for setting the grid, the screen of the displayed grid and grid points, etc. may be freely replaced with ones having similar functions, and the grid width information other than the above information, Additional information may be added. The operation of the snap processing can be realized by various similar arithmetic processings other than the above.

[Third Invention] FIG. 15 is a block diagram of an apparatus according to the third invention. The device of the third invention is a device for facilitating the analysis of the displayed time chart. The device shown in the figure is provided with a logic simulator 2, a control unit 110, a storage unit 120, an output unit 130, a section designating unit 140, and a graphic display 5 for a bus line 1. The graphic display 5 is called a display unit in the present invention.

The logic simulator 2 is composed of an arithmetic processing circuit which outputs the result of simulating a logic circuit as in the conventional device. The control unit 110 includes a time chart data processing unit 111 and a division control unit 112. In the present invention, a process is performed in which a designated section of the time chart displayed on the graphic display 5 is divided and edited and displayed. Time chart data processing unit 1
11 and the division control unit 112 are provided to control them respectively.

The storage unit 120 is provided with a time chart data storage unit 121 and a division information storage unit 122. The time chart data storage unit 121 stores the time chart data output from the logic simulator 2, and the division information storage unit 122 includes a portion for storing the specified division information in a format described later. It The plot output unit 132 is a device that includes a printer or the like and that outputs the plot drawing 133.
The output unit 130 is composed of such a printer, as well as various printing or display devices for outputting an arbitrary edited time chart. The section designating unit 140 uses the keyboard 14
1 and a mouse 142. In the present invention, the keyboard 14 provided in the section designating unit 140
An appropriate section of the time chart is designated by 1 or the mouse 142, and the section is divided and edited.

FIG. 16 is an explanatory view (No. 1) of an example of a general comparison method. Generally, the time chart output from the logic simulator 2 has a very complicated structure, and how different specific signals are different or how they change in a certain section. May be verified in detail. For example, the output of a certain logic circuit may perform the same operation with a certain period as a cycle. If the respective parts of this signal are to be compared, for example, as shown in FIG.
The output up to 00 msec, the output from 100 msec to 200 msec, and the output from 200 msec to 300 msec are respectively performed, and the plot drawings 133 are vertically aligned and compared with each other. As a result, when the operation mode is switched at a cycle of 100 msec, for example, the state in which the signal to be changed is changed correctly or the signal which should not be changed is not accurately changed. Can be compared to.

FIG. 17 is an explanatory view (No. 2) of an example of a general comparison method. In the example of this figure, the plot output unit 135 outputs a continuous plot drawing 133 from 0 msec to 300 msec. Then, the operator appropriately cuts the drawings, arranges them vertically, and sticks them together, and performs the same comparison as described above. However, the above-mentioned processing is extremely complicated, and the present invention achieves the following efficiency. FIG. 18 shows a specific content chart of the time chart data. For example, it is assumed that the time chart data as shown in this figure is stored in the time chart data storage unit 121 of FIG. 15 and the editing process is performed.

FIG. 19 shows a procedure flowchart according to the method of the present invention. In the method of the present invention, the necessary screens and the like are output according to such a flowchart. That is, as shown in step S1, first, the time chart as shown in FIG. 18 is appropriately divided and displayed. Then, in step S2, correction work such as rearrangement of the time chart is performed as necessary. Further, in step S3, the time chart is stored again in the time chart data storage unit 121. This data is used for display output or print output.

Next, the operation of the apparatus of the present invention will be described more specifically. FIG. 20 shows a content chart of the time chart data. In the method of the present invention, as shown in this figure, for example, a plurality of predetermined sections P1, P2, P3, P4 viewed in the time axis direction of the time chart data of the signals A, B, C ... Are designated. When the comparison of the sections P1 and P4 is requested for the signal A, and the comparison of the sections P1, P2, and P3 is requested for the signal A, the signal B, and the signal C, such designation is performed. . This designation is executed by the mouse 142 or the like of the section designation unit 140 shown in FIG. Therefore, the time chart data shown in FIG. 20 is displayed on the graphic display 5, and the above-mentioned sections P1 to P4 are designated by the mouse 142. Upon receiving this designation, the division control unit 112 divides part of the time chart data. Then, editing is performed while matching the time axis.

FIG. 21 shows an output example explanatory diagram. The output after the above-described division processing and editing processing are executed is as shown in this figure. That is, as shown in the drawing, the designated sections P1, P2, P3, and P4 designated in FIG. 20 are arranged so that their time axes coincide with each other, and are arranged vertically and edited for easy comparison. In this example, finally, the signals A, B and C are cut out and compared with each other at a cycle of 100 seconds.

FIG. 22 shows an explanatory diagram of division information. When performing the above division processing, as shown in this figure, predetermined division information for output data is required. That is,
Output start time and output end time are set in this division information, and the time chart data is divided in this range.
The division unit time is a portion that specifies the width of the output time chart. The number of divisions is a part indicating how many divisions from the output start time to the output end time are divided. As shown in FIG. 21, in this embodiment, the period from 0 msec to 300 msec is divided into three and displayed. Further, the division information includes the number of output signals and the output signal name. Thereby, the division control unit 112 can perform control to divide the time chart data stored in the time chart data storage unit 121, edit the time chart data, and display the divided time chart data. The division information as described above is stored in the division information storage unit 122.

In order to generate the above division information,
The following processing is executed. FIG. 23 shows an explanatory view of the output signal selection screen. As shown in this figure, the operator
Of the 6 signals up to the signals A, B, C ... F, any number of signals are designated to be edited. FIG. 24 shows an explanatory view of the output format setting screen. Using the screen as shown in this figure, the operator sets the output time range and division unit time for editing. As a result, division information as shown in FIG. 22 is generated.

FIG. 25 shows an operation flowchart of the apparatus of the second invention. In step S1, first, the time chart output function is activated. That is, the operation of the plot output unit 132 and the like shown in FIG. 15 is prepared. Next, in step S2, an output signal is selected. This is the process of specifying the signal to be output as described with reference to FIG. Next, in step S3, the output time width and the division unit time are input. This is the operation on the screen as described with reference to FIG. Further, in step S4, the number of divisions is calculated. This is performed by the division control unit 112 shown in FIG. The number of divisions is obtained by dividing the output time width by the division unit time.
Next, in step S5, the division information is stored in the division information storage unit.

Subsequently, the division control unit verifies the plotability. This is because, for example, if the number of selected signals is too large or the number of divisions is too large, it may not be possible to fill in the plot drawing 133. If it is determined that plot output is impossible, the process returns from step S7 to step S2, and the output signal selection work and the like are performed again. If it is determined that plotting is possible, the process proceeds from step S7 to step S8, and the divided plotting process is performed. This is a process of sending specified division data to the plot output unit 132 and vertically arranging the time chart for each division unit.

The present invention is not limited to the above embodiments. For example, when the amount of data to be output is large, two plot drawings can be used. FIG. 26 is an explanatory diagram of the contents of time chart data for explaining such an example. In this data, as shown in the figure, eight sections to be divided and displayed are designated from P1 to P8.
FIG. 27 shows an output example explanatory diagram (No. 1), and FIG. 28 shows an output example explanatory diagram (No. 2). As shown in the above figure, on the first page of the plot drawing, designated sections P1 and P
2, P3, P7 are output, and the designated section P is displayed on the second page.
Portions 4, P5, P6, and P8 are displayed and output with their time axes aligned.

In order to realize the above output, the following division information is used. FIG. 29 shows an explanatory diagram of division information. As shown in this figure, the division information is composed of an output start time, an output end time, a division unit time, a division unit time per page, a division number, an output signal number, an output signal name, and the like. As a result, first, the output time width is 300 msec and the division unit time is 100 msec. However, if this 100 msec width is too wide to output to the plot drawing 133, the division unit time per page is 50 m. In seconds.
Therefore, in the example of FIG. 27, the signals A, B, and C are changed from 0 seconds to 50 seconds.
msec, 100 sec to 150 msec, 200 sec to 250 m
For each second, output is made so as to make a comparison.
In the example of FIG. 8, signals A, B, and C are respectively set from 50 ms to 1
It is displayed such that they are compared with each other for 00 msec, 150 msec to 200 msec, and 250 msec to 300 msec. By thus providing the information indicating the division unit time per page, it is possible to set the output width after editing.

FIG. 30 is a diagram for explaining the contents of the time chart data obtained by another designation method. In this figure, signals and sections P1, P2, P3, and P4 are designated, and when these are output in comparison with each other, editing summarized for each signal is designated. FIG. 31 shows an explanatory diagram of the output example. As shown in this figure, according to this embodiment, for the signal A, 0 msec to 100 msec and 100 msec to 200 msec, respectively.
Second, the output signals of 200 msec to 300 msec are arranged and edited for easy comparison. The same applies to the signals B and C. In this case, division information of editing for each signal is added.

[0048]

According to the time chart editing apparatus of the present invention described above, when a plurality of vertices are designated on a display screen to draw a signal consisting of a polygonal line, snap processing is performed when the vertices of the signal are designated. The grid points are set to a unique periodic interval for each signal to be drawn, and this is stored as grid information in the grid information storage unit, and the signals to be edited are displayed on the display screen where multiple signals are arranged and displayed. When the specified signal is specified, refer to the grid information and select the unique periodic interval set corresponding to the specified signal,
Since the grid width selection unit for controlling the snap processing is provided, the operator does not need to set the grid information each time the signal to be edited is switched. Therefore, the signal drawing operation can be facilitated, and an error in the time chart due to a mistake in changing grid information or the like can be prevented. If the offset width is set collectively in the same manner and then automatically selected along with the selection of the grid information, the efficiency of the drawing work can be improved much more than before.

In the third invention, the time chart showing the operation simulation result of the circuit element is as follows.
By designating a plurality of predetermined sections as viewed in the time axis direction and dividing them and editing them, an output section that outputs the division control section is provided. The work of verifying by comparison can be easily performed. As a result, the efficiency of the verification work of the time chart is improved, and it is possible to prevent omission of the check.

[Brief description of drawings]

FIG. 1 is a block diagram of a time chart editing device of the present invention.

FIG. 2 is a block diagram of a conventional time chart editing device.

FIG. 3 is an explanatory diagram of a method of displaying a time chart.

FIG. 4 is an explanatory diagram of a grid width change screen.

FIG. 5 is an explanatory diagram of a screen after changing the grid width.

FIG. 6 is an explanatory diagram of grid width information according to the present invention.

FIG. 7 is an explanatory diagram of grid width information according to the present invention.

FIG. 8 is an explanatory diagram of a grid width information setting screen.

FIG. 9 is an explanatory diagram of a method of displaying a time chart according to the present invention.

FIG. 10 is an operation flowchart of the device of the present invention.

FIG. 11 is an explanatory diagram of a grid having an offset.

FIG. 12 is an explanatory diagram of a conventional setting screen.

FIG. 13 is an explanatory diagram of a setting screen according to the present invention.

FIG. 14 is an explanatory diagram of grid width information according to the present invention.

FIG. 15 is a block diagram of an apparatus of a third invention.

FIG. 16 is an explanatory diagram (1) of an example of a general comparison method.

FIG. 17 is an explanatory view (No. 2) of an example of a general comparison method.

FIG. 18 is an explanatory diagram of time chart data content.

FIG. 19 is a flowchart of the procedure according to the method of the present invention.

FIG. 20 is an explanatory diagram of contents of time chart data.

FIG. 21 is an explanatory diagram of an output example.

FIG. 22 is an explanatory diagram of division information.

FIG. 23 is an explanatory diagram of an output signal selection screen.

FIG. 24 is an explanatory diagram of an output format setting screen.

FIG. 25 is an operation flowchart of the device of the third invention.

FIG. 26 is an explanatory diagram of contents of time chart data.

FIG. 27 is an explanatory diagram (1) of an output example.

FIG. 28 is an explanatory diagram (2) of an output example.

FIG. 29 is an explanatory diagram of division information.

FIG. 30 is an explanatory diagram of the contents of time chart data.

FIG. 31 is an explanatory diagram of an output example.

[Explanation of symbols]

 1 Bus line 2 Logic simulator 4 Storage unit 5 Graphic display 8 Plot output unit 30 Control unit 31 Grid setting unit 32 Grid width selection unit

Claims (3)

[Claims] 1. A time chart in which a plurality of signals, each of which is composed of a polygonal line connecting a plurality of vertices, are arranged on a display screen with reference to predetermined coordinates is created and edited. When designating the vertices of, when the vertices of the signal are designated, the snap processing unit that automatically moves the designated vertices to a grid point near the designated location, and draws the grid points. A grid setting unit that sets a unique periodic interval for each signal to be drawn, a grid information storage unit that stores the unique periodic interval as grid width information in association with each signal to be drawn, On the display screen where the signals are arranged and displayed, when the signal to be edited is specified, by referring to the grid information, a specific periodic interval set corresponding to the specified signal is selected, Suna Time chart editing apparatus characterized in that a grid width selecting unit for controlling the up process. 2. The grid width information includes, from the unique periodic intervals and temporary grid points set at the periodic intervals,
The time chart editing device according to claim 1, wherein offset data for setting an actual grid point is included at a position shifted by a constant offset width. 3. A display unit for displaying a time chart showing the operation simulation result of the circuit element on a display screen, a section designating section for designating a plurality of predetermined sections viewed in the time axis direction of the time chart, and the plurality of sections. 2. A time chart editing device comprising: a division control unit that divides and edits the time chart of the designated section by dividing the time chart, and an output unit that outputs the display content controlled by the division control unit.