JPH0618564A - Logic waveform displaying method - Google Patents

Abstract

PURPOSE:To easily and visually discriminate a logic waveform. CONSTITUTION:A plurality of displaying areas are prepared in a displaying section 13, such as the CRT, etc., in corresponding to a plurality of input channels CH and each displaying area is arbitrarily divided into divisions along the time base of each displaying area. Then specific backgrounds meaning waveform discriminating criteria are given to the divided divisions and, at the same time, the logic waveforms LW1-LW3 of input channels are respectively displayed by superimposing the waveforms upon the specific backgrounds in their corresponding displaying areas.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for displaying a logic waveform, and more particularly, to a method for displaying a logic waveform which allows visual determination of the waveform easily.

[0002]

2. Description of the Related Art FIG. 5 shows an example of a conventional screen when a waveform judgment of a logic waveform is made on a display screen. That is, for example, a judgment area 2 surrounded by an upper limit value 2a and a lower limit value 2b is set on a display screen 1 composed of a CRT or a plasma display, and the waveform judgment is made depending on whether or not the logic waveform LW is within the judgment area 2. I am trying to do.

[0003]

This method is similar to the analog waveform judgment, but in the case of a logic waveform, it suffices to mainly judge the rising edge and the falling edge of the waveform. do not have to.

Further, when displaying a plurality of logic waveforms on one screen, if the number of input channels becomes large, for example, 8 to 16, it is necessary to set a judgment area for each channel in view of display space. Is not easy.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional circumstances.
, Etc., multiple display areas corresponding to multiple input channels are prepared, each display area is divided into arbitrary sections along its time axis, and the specific background that means the waveform judgment standard is displayed on the section screen. And the logic waveform of each of the input channels is displayed so as to be superimposed on the specific background in the corresponding display area.

[0006]

In the ward screen where the background of each ward screen in the display area is darker than the background color of the screen, for example, "Hi" is always displayed, whereas in the ward screen where the background is, for example, a hatched pattern, "Lo" is always displayed. By setting the waveform judgment reference in the display area and displaying the logic waveform in the display area in an overlapping manner, the waveform judgment of the logic waveform can be easily made visually.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First Embodiment FIG.
A display device such as that illustrated in FIG. According to this, the apparatus has an input unit 11 for inputting a logic waveform, a RAM (random access memory) 12 for storing the logic waveform, and a CRT 1 as a display means.
3 and the data output unit 14, and each of these units 11 to 14
A CPU (central processing unit) 15 for controlling data input / output and the like, and an operation unit 16 for setting a waveform determination reference for a logic waveform in the CPU 15 are provided.

2 and 3 show C according to this embodiment.
An example of the display screen of the RT 13 is shown. Here, the number of input channels of the logic waveform in the input unit 11 is C
There are 8 channels from H1 to CH8, and when the number of channels is input to the CRT 15 from the operation unit 16, CR
Eight display areas corresponding to CH1 to CH8 are prepared on the display screen of T13.

In this case, each display area has an interval of 1 ms / 1 div along its time axis, that is, 1 per scale.
It is partitioned with an interval of ms.

In performing the waveform determination of the logic waveform, according to the present invention, the background of each section screen has the meaning of the waveform determination reference.

In this example, four waveform judgment criteria of background to are prepared. That is, the background is darker than the background color of the screen, and the waveform determination standard is set such that the logic waveform is always "Hi" in the divided screen of the background.

Further, the background is a hatching pattern, and the logic waveform is always "Lo" in the section screen of the background, and the background is a satin pattern, and the logic waveform rises or rises in the background section screen. There is at least one downward movement, and the background is the background color of the screen, and "Hi" and "L" are displayed in the section screen of the background.
Each of the waveform determination criteria is set such that any one of “o” may be used, and that there may be a change in rising and falling. Normally, the background is selected over the entire display area corresponding to the unused channel.

Explaining it concretely by taking FIG. 3 as an example, for the channel CH1, the background is set to a hatching pattern in the section screen from the start of the determination to 1 ms, and the background is set in the section screen of 1 ms to 2 ms. Is set to a dark color, and thereafter, the background of each section screen, that is, the waveform determination standard is set so that this is repeated alternately.

For the channel CH2, the background is set to the background color of the section screen from the start of the judgment to 1 ms, and the background is set to the dark color of the section screen of 1 ms to 4 ms. The background of each ward screen is set so as to be repeated.

For channel CH3, the background is set to a hatching pattern on the section screen from the start of the determination to 1 ms, and the background is set to a satin pattern on the section screen of 1 ms to 2 ms, and further for 2 ms to 3 ms. On the ward screen, the background is set to a dark color, and then 1ms
The background of each ward screen is sequentially set so that the background becomes →→→→ in each unit of.

FIG. 4 exemplifies an operation flowchart in the case of setting a waveform judgment reference for each display area based on the background pattern, color tone, etc. of each display area as described above.

That is, first, a channel desired to be set is selected with a mouse cursor or the like. Next, one of the above-mentioned backgrounds is selected and input for each section screen along the time axis. Then, after selecting whether to input or change the setting of another channel, the user continuously selects or finalizes the setting.

After setting the waveform judgment reference in the display area of each channel as described above, the logic waveform is displayed in the display area. Channels CH1 to CH3 are shown in FIG.
Although a part of the logic waveforms LW1 to LW3 corresponding to is exemplified, the waveform determination can be easily performed visually by superimposing and displaying the logic waveform on the background as the waveform determination reference. it can.

That is, referring to FIG. 3, the logic waveform LW1 of the channel CH1 is 0 to 0.
Lo until 1 ms, Hi for 1 to 2 ms, and thereafter, if this is repeated in units of 1 ms, GO is determined.

Also, the logic waveform L of the channel CH2
W2 may be in any state from 0 to 1 ms, but is Hi for 1 to 4 ms, and if this is repeated thereafter, GO is determined.

Further, regarding the logic waveform LW3 of the channel CH3, Lo is 0 to 1 ms, and is 1 to 2 ms.
There is a rise or fall change at least once during the period, Hi during 2-3 ms, a rise or fall change at least once during 3-4 ms, and Lo during 4-5 ms. , There is a change of rising or falling at least once in 5 to 6 ms.
It is determined to be GO for 7 to 7 ms and GO if there is a change in rising or falling at least once in 7 to 8 ms.

In parallel with such visual judgment, the CPU
It is also possible to compare each logic waveform with a waveform determination reference at 15 and print the result from the data output unit 14.

In the above-mentioned embodiment, the background is set to four types, but the present invention is not limited to this.

Although a CRT is used as the display means, other displays may be used, and a printer may be used depending on the case.

On the other hand, as can be seen from FIG. 2, the channels CH4 to CH8 are unused channels in this embodiment.

[0026]

As described above, according to the present invention, the display area of the logic waveform is partitioned along the time axis,
By providing the section screen itself with a background meaning a waveform determination reference and displaying the logic waveform in a superimposed manner on the background, the waveform determination can be easily performed visually.

Further, there is an effect that it can be applied without making any change even when the number of channels is increased.

[Brief description of drawings]

FIG. 1 is a schematic block diagram of a display device applied to the present invention.

FIG. 2 is an explanatory diagram showing an example of a display screen according to an embodiment of the present invention.

FIG. 3 is an enlarged view showing a part of the display screen of FIG. 2 in an enlarged manner.

FIG. 4 is a flowchart showing an operation procedure when setting a waveform determination reference.

FIG. 5 is an explanatory view showing an example of a conventional display screen.

[Explanation of symbols]

 11 input unit 12 RAM 13 display means (CRT) 14 data output unit 15 CPU 16 operation unit

Claims (1)

[Claims] 1. A display section such as a CRT is provided with a plurality of display areas corresponding to a plurality of input channels, each display area is divided into arbitrary sections along the time axis, and a waveform judgment reference is displayed on the section screen. And a logic background of each of the input channels is displayed in a display area corresponding to the logic background so as to be superimposed on the specific background.