JPH0210438B2 - - Google Patents

Description

[Detailed Description of the Invention] [Summary] Regarding a time chart display method that displays each line segment of a time chart on a screen separately from other line segments, the displayed signal values can be accurately and easily read at a glance. A display device that displays a time-series time chart on a display screen in a stationary state, which stores each line segment data of the time chart, reads out each line segment data according to a line segment data series, and Output display mode data specifying different display modes according to the signal values of the corresponding line segment data, and display the line segments of the read line segment data on the display screen according to the corresponding display mode data. It was configured as follows.

[Industrial application field]

The present invention relates to a time chart display system, and more particularly to a time chart display method for displaying each line segment of a time chart on a screen while distinguishing it from other line segments.

The internal operating status of a computer, etc. is displayed on a display device in the form of a time chart to determine whether the internal operation is good or not.
Techniques for performing diagnosis and the like are in practical use. It is desirable that the time chart displayed on the display device be easy to see for those viewing it.

However, in the conventional display mode, there are cases in which the above-mentioned purpose cannot be achieved at all depending on the displayed signal, so there is a strong desire for the development of technical means that can solve this problem.

[Conventional technology]

In the conventional display mode of the above-mentioned type of time chart, as shown in FIG. 9, all line segments of the time chart, that is, line segment portions at any binary level, are displayed in the same format. In other words, regardless of which level you are at,
It simply displayed the timeline of the time chart on the screen.

[Problem to be solved by the invention]

Because it was in such a display format, A in Figure 9
Even if the time chart includes both binary levels as shown in the figure, the upper line segment is "1".
Or, it may be mistaken to see whether it is "0", and there is a problem in that it is impossible to tell at all whether signals B and C are at "1" or "0" just by looking at them. . This type of work can lead to misunderstandings.

The present invention was created in view of the drawbacks of the conventional methods as described above, and its purpose is to provide a time chart display method that allows the displayed signal values to be read accurately and easily at a glance. purpose.

[Means to solve the problem]

The present invention provides a display device that displays a chronological time chart on a display screen in a stationary state, stores each line segment data of the time chart, reads out each line segment data according to the line segment data series, and Display mode data specifying different display modes according to the signal values of the line segment data is output, and the line segments of the read line segment data are displayed on the display screen according to the corresponding display mode data. It consists of

[Effect]

For a time chart to be displayed in a stationary state on the display screen of a display device, first, data of each line segment making up the time chart is stored. Each stored line segment data is read out in accordance with the time series of the line segments forming the time chart. At that time,
Display mode data specifying a display mode according to the signal value of the read line segment data is output.

Both of these data are used by a display control section in the display device, and a line segment to be displayed according to the line segment data is displayed in a display mode according to the display mode data.

This makes it easier to identify the line segments of the displayed time chart and helps prevent erroneous reading.

〔Example〕

FIG. 1 shows an embodiment of the invention. In this figure, reference numeral 1 denotes an object to be observed, such as a logic circuit, which is connected to a central processing unit (hereinafter abbreviated as CPU) 2. A memory 3 and a display device 4 are connected to the CPU 2.

The memory 3 is provided with a first table atable as shown in FIG. 2 and a second table btable as shown in FIG.

Next, the operation of such a constituent device will be explained with reference to the flowcharts of FIGS. 4 to 6.

For convenience of explanation, the first table is atable and the second table is atable.
It is assumed that data has been written to the table btable by a known means.

When the process is started by the CPU 2, the starting point P of the line segment PQ to be displayed as illustrated in FIG.
data about time T ₁ and its signal value V ₁
is obtained from the first table atable by the processing of steps S1 to S5 in FIG. In Figure 4, _t1 is the display start time, _a1 is the signal to be displayed in the table atable, for example the start address of the data of signal A in Figure 8, and atable (v, a) is the address of the table atable. The signal value data in a, atable (t, a) is the time data in address a of table atable, Tw is the time of the next data, _a2 is the signal data to be displayed in table atable represents the final address of

Next, through the processing of steps S6 to S10 in FIG. 5, data regarding the end point Q of the line segment PQ in FIG. 7, ie, _T2, is obtained.

These obtained data T ₁ and T ₂ are converted into X coordinates X ₁ and X ₂ on the display surface of the display device 4 (step S11). f(T) in step S11 is a function that converts time T into an X coordinate on the display screen.

After that, the data obtained as described above
From V ₁ to Y coordinate Y ₁ on the display surface, do the following:
It is determined in steps S12 to S14. If V ₁ =0, then Y ₁ =Y _A ; if V ₁ =1, Y ₁ =Y _A +Y _T.

The color C ₁ in which line segment PQ should be displayed depending on the value of V ₁
is determined using the second table btable in step S15. btable in step S15
(V ₁ ) represents finding the color data C ₁ for the signal value V ₁ of the second table btable.

In this way, once the data regarding the line segment PQ is ready, the coordinates (X ₁ , Y ₁ ) on the display surface
A line segment PQ is drawn from (X ₂ , Y ₁ ) in color C ₁ (step S16).

After that, it is determined in step S17 that T ₂ <t _E (where t _E is the display end time).
If T ₂ ≧t _E , the signal, for example, signal B in Fig. 8
One round of display processing for is completed.

If the determination at step S17 is affirmative,
Line segment QR to be displayed as illustrated in Figure 7
processing begins, and the signal value data is extracted from the first table.
V ₂ is determined (step S18). Then, the Y coordinate _Y2 on the display surface is determined from the data _V2 in steps S19 to S21 in the following manner. V ₂ =
If it is 0, then Y ₂ = Y _A , and if V ₂ = 1, then Y ₂ = Y _A +
Let's say Y _T.

Then, in step S22, the color _C2 in which the line segment QR changing from _V1 to _V2 should be displayed is determined using the second table btable. btable (V ₁ , V ₂ ) in step S22 represents obtaining color data C ₂ when the signal value of the second table btable changes from V ₁ to V ₂ .

In this way, once the data regarding the line segment QR is ready, the coordinates (X ₂ , Y ₁ ) on the display surface
A line segment QR is drawn from (X ₂ , Y ₂ ) in color C ₂ (step S23).

Then, _T2 is set to _T1 , _V2 is set to _V1 , and the next section is drawn (step S24).

As an example when the signal A in FIG. 8 is displayed as described above, the signal 0 and the line segment from 0 to 1 are drawn in blue, and the signal 1 and the line segment from 1 to 0 are drawn in red. Ru.

Therefore, the signals displayed on the display surface can be read accurately and easily.

In addition, although the above embodiment describes an example in which line segments are classified and displayed by color, the color information may be changed to line width information. Alternatively, it may be a dot, a dash, or the like.

〔Effect of the invention〕

As described above, according to the present invention, since the line segment display is displayed with identification information attached to the line segment, it is possible to read the line segment accurately and easily. Therefore, this type of reading workability is also improved.

[Brief explanation of drawings]

FIG. 1 is a diagram showing an embodiment of the present invention, FIG. 2 is a diagram showing a first table used in the embodiment of FIG. 1, and FIG. 3 is a diagram showing a second table used in the embodiment of FIG. 1. FIGS. 4 to 6 are flowcharts used to explain the embodiment in FIG. 1, and FIG.
Figure 8 is an explanatory diagram of the process in which each line segment of the time chart displayed in the embodiment is displayed. Figure 8 is a diagram showing an example of a signal displayed by the present invention. Figure 9 is a diagram showing an example of a signal displayed on the display screen using the conventional method. It is a diagram showing a time chart. In FIG. 1, 1 is an object to be observed, 2 is a central processing unit, 3 is a memory, and 4 is a display device.

Claims (1)

[Claims] 1. A display device that displays a time-series time chart on a display screen in a stationary state, comprising: storing each line segment data of the time chart, and reading out each line segment data according to a line segment data series. At the same time, output display mode data specifying different display modes according to the signal values of the corresponding line segment data, and display the line segments of the read line segment data on the display screen according to the corresponding display mode data. A time chart display method characterized by: 2. The time chart display method according to claim 1, wherein the display mode is produced using any one of color, line width, line type, or a combination thereof.