JP2005164532A - Waveform display unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a waveform display unit capable of facilitating visual recognition of waves corresponding to data values. <P>SOLUTION: The waveform display unit displays the wave of the data transmitted on a serial bus, in addition to the improvement in the waveform display unit, which displays two or more data values of a frame which is a large partition of data. In the vicinity of the wave which is to be displayed, the waveform display unit is provided with a bit-value display means for displaying the data values of the frame in one bit value, bit by bit, and a region display means for displaying a region, by discriminating a region where the wave contained in the frame is displayed from a region where the wave contained in the frame is not displayed. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a waveform display device that displays a waveform of data transmitted on a serial bus and performs at least one of display of a data value or pattern search for a desired data value, and more specifically, a waveform corresponding to a data value. It is related with the waveform display apparatus which can recognize visually easily.

Some digital oscilloscopes, which are a type of waveform measuring device, have a function of analyzing data values of data on a serial bus. Such a digital oscilloscope can analyze waveforms flowing on the serial bus and display a list of the analysis results. The serial bus includes, for example, an SPI (Serial Peripheral Interface) bus, a CAN (Controller Area Network) bus, an I ² C (Inter-Integrated Circuit) bus, and the like. The waveform display device is used in such a waveform measurement device.

  FIG. 6 is a diagram showing a configuration of a conventional waveform display device (see, for example, Patent Document 1). In FIG. 6, the AD converter 1 receives analog data as an input signal and converts the input analog data into digital data. The AD converter 1 is provided with a plurality of channels of AD converters 1 for measuring a plurality of waveforms to be measured simultaneously, but only one channel is shown.

  The memory 2 is a storage unit and stores digital data from the AD converter 1. The hard disk 3 is a storage unit having a larger storage capacity than the memory 2 and stores digital data. The control unit 4 stores the digital data in the memory 2 on the hard disk 3, reads the digital data from the memory 2 and the hard disk 3, analyzes the waveform of the digital data, and controls the entire apparatus. The display processing unit 5 causes the display unit 6 to display the waveform of the digital data read by the control unit 4, the analysis result, and the like. The display unit 6 has a display screen such as a CRT or a liquid crystal.

  Next, FIG. 7 is a display screen example of the display unit 6 after data analysis of the signal on the SPI bus. The clock of the SPI bus is measured by the AD converter 1 of the first channel, and the second channel is not shown. Data on the SPI bus is measured by an AD converter (see, for example, Patent Document 2). In FIG. 7, the main screen 10 displays the SPI bus clock measured in the first channel and the SPI bus data measured in the second channel. The zoom box 11 designates an area to be enlarged and displayed. Although only two channels are shown, a single channel or multiple channels may be measured and displayed.

The zoom screen 20 enlarges and displays the area specified by the zoom box 11. The analysis result list display unit 30 displays analysis results including data of the area specified by the zoom box 11. The items will be described in order from the top item. The frame number “No.” is a frame number assigned in the order of arrangement within the waveform measuring apparatus. Note that a frame is a large segment of data. In the case of an SPI bus, one frame is composed of 8 bits (that is, 8 clocks). In addition, the CAN bus and the I ² C bus have one frame with a different number of bits from the SPI bus.

  The data value “Dt1” indicates the data value (displayed in hexadecimal) of the data for each frame of the second channel. The data value “Dt2” is the data value of the data for each frame of the third channel (displayed in hexadecimal), but the value is not shown as not being analyzed. The frame box 31 automatically selects a frame displayed at the center position of the zoom screen 20.

The operation of such an apparatus will be described.
The analog data is converted into digital data by the AD converter 1 and stored in the memory 2. Further, the control unit 4 stores the digital data in the memory 2 in the hard disk 3 as necessary. Then, the control unit 4 reads digital data from the memory 2 or the hard disk 3 and performs waveform analysis.

  Further, the display processing unit 5 displays the waveform of the input signal and the waveform analysis result on the main screen of the display unit 6. In addition, the display processing unit 5 enlarges the area of the zoom box 11 designated by an operation from an operation unit (not shown) and displays it on the zoom screen 20. Furthermore, the analysis result is displayed for each frame on the analysis result list display unit 30 as necessary.

  When the position of the frame box 31 is changed by an operation from an operation unit (not shown), the display processing unit 5 changes the position of the zoom box 11 on the main screen 10 to start the frame data specified by the frame box 31. The position is displayed at the center position of the zoom screen 20.

Japanese Patent Laid-Open No. 2002-148283 (paragraph numbers 0002-0004, FIG. 5) Japanese Patent Laid-Open No. 2002-311060 (paragraph number 0012-0035, FIG. 1)

  Thus, since the data value obtained by analyzing the data of each frame is displayed in hexadecimal on the analysis result list display unit 30, the user can easily confirm the data value obtained by analyzing each frame. In addition, in order to check the waveform of data and the bit value for each bit (a binary number or a value represented by a low level or a high level), the user designates a frame to be checked in the frame box 31 and selects a desired frame. The head of the data or waveform is displayed at the center position of the zoom screen 20.

  However, although the data value of each frame can be easily known, it is difficult to recognize and recognize the length and bit value of the waveform of the designated frame from the waveforms displayed on the zoom screen 20. there were.

  For example, in order to determine the waveform or bit value corresponding to the frame number “1” (the frame specified in the frame box 31 in FIG. 7) from the zoom screen 20, the value “48” displayed in hexadecimal is used. The user must calculate and obtain the binary value “01001000”. It is necessary to obtain each bit value of the data of the second channel by referring to the rising edge of the waveform of the clock of the first channel, and to search for the bit value pattern “01001000” of the data one bit at a time. As described above, there is a problem that it is difficult to recognize a waveform area or a bit value indicated by the data value. In particular, when the data length included in one frame is long, it becomes more difficult to recognize the waveform region and the bit value.

  Therefore, an object of the present invention is to realize a waveform display device that can easily visually recognize a waveform corresponding to a data value.

The invention described in claim 1
In the waveform display device that displays a waveform of data transmitted on the serial bus and displays a plurality of data values of a frame that is a large delimiter of the data,
Bit value display means for displaying the data value of the displayed frame as a bit value bit by bit is provided in the vicinity of the displayed waveform.

The invention according to claim 2
In the waveform display device that displays a waveform of data transmitted on the serial bus and displays a plurality of data values of a frame that is a large delimiter of the data,
An area display means for distinguishing and displaying an area where the waveform included in the frame is displayed and an area where the waveform included in the frame is not displayed is provided.

The invention described in claim 3
In the waveform display device that displays a waveform of data transmitted on the serial bus and displays a plurality of data values of a frame that is a large delimiter of the data,
In the vicinity of the displayed waveform, a bit value display means for displaying the data value of the displayed frame as a bit value bit by bit,
An area display means for distinguishing and displaying an area where the waveform included in the frame is displayed and an area where the waveform included in the frame is not displayed is provided.

The invention according to claim 4 is the invention according to claim 2 or 3,
The area display means is characterized in that the area in which the waveform of the frame is displayed is changed for each frame.

The invention according to claim 5 is the invention according to any one of claims 2 to 4,
The area display means is characterized in that the color of the area in which the waveform of the frame is displayed is changed and displayed.

The invention according to claim 6 is the invention according to any one of claims 2 to 5,
The area display means displays the area where the data value of the frame is displayed in the same manner as the area where the waveform of the frame is displayed.

The invention described in claim 7
In a waveform display device for searching for a pattern of data having a desired data value from data transmitted on the serial bus and displaying the waveform of the searched pattern.
Bit value display means for displaying the data value as a bit value bit by bit is provided in the vicinity of the displayed waveform.

The invention described in claim 8
In a waveform display device for searching for a pattern of data having a desired data value from data transmitted on the serial bus and displaying the waveform of the searched pattern.
An area display means for distinguishing and displaying an area in which the waveform included in the searched pattern is displayed and an area in which the waveform included in the searched pattern is not displayed is provided.

The invention according to claim 9
In a waveform display device for searching for a pattern of data having a desired data value from data transmitted on the serial bus and displaying the waveform of the searched pattern.
Bit value display means for displaying the data value as a bit value bit by bit in the vicinity of the displayed waveform;
An area display means for distinguishing and displaying an area in which a waveform included in the searched pattern is displayed and an area in which the waveform included in the searched pattern is not displayed is provided.

The invention according to claim 10 is the invention according to claim 8 or 9, wherein
The area display means is characterized in that the color of the area in which the waveform of the pattern is displayed is changed and displayed.

The invention according to claim 11 is the invention according to any one of claims 1 to 10,
It is used for a waveform measuring device.

The present invention has the following effects.
According to the first to eleventh aspects, since the waveform display is changed based on the data value, the waveform corresponding to the data value can be easily recognized visually.

  According to the first, third, sixth and eleventh aspects, since the bit value display means displays the bit value in the vicinity of the displayed waveform, the waveform corresponding to the data value can be easily recognized visually. . Thereby, the positional relationship between the data value and the waveform and each bit value of the waveform can be easily recognized one bit at a time, and the waveform can be easily analyzed visually.

  According to the second to sixth and eleventh aspects, since the area display means distinguishes and displays the area in which the waveform included in the frame is displayed and the area in which the waveform included in the frame is not displayed. The corresponding waveform can be easily recognized visually. Thereby, the area | region which the data value has shown can be caught visually.

  According to the fourth aspect, since the area display means displays the area in which the waveform included in the frame is displayed differently for each frame, the area indicated by each data value can be easily distinguished. it can.

  According to the fifth aspect, since the area display means displays the waveform included in the frame by changing the color of the area, the area can be clearly distinguished by the color.

  According to the sixth aspect, since the area display means displays the area where the data value of the frame is displayed in the same way as the area where the waveform included in the frame is displayed, the relationship between the data value and the waveform can be easily achieved. Can be recognized.

  According to the seventh and ninth to eleventh aspects, since the bit value display means displays the bit value of the searched pattern in the vicinity of the displayed waveform, the waveform corresponding to the data value can be easily recognized visually. Can do. Thereby, the positional relationship between the data value and the waveform and each bit value of the waveform can be easily recognized one bit at a time, and the waveform can be easily analyzed visually.

  According to the eighth to eleventh aspects, since the area display means displays the area in which the waveform included in the searched pattern is displayed and the area in which the waveform included in the searched pattern is not displayed, the searched pattern The waveform corresponding to the data value can be easily recognized visually. Thereby, the area | region which the data value has shown can be caught visually.

  According to the tenth aspect, since the area display means displays the waveform included in the searched pattern by changing the color of the area, the area can be clearly distinguished by the color.

  According to the eleventh aspect, for example, a waveform corresponding to a data value subjected to waveform analysis can be easily visually recognized with a waveform measuring apparatus centered on a digital oscilloscope.

Embodiments of the present invention will be described below with reference to the drawings.
[First embodiment]
FIG. 1 is a block diagram showing a first embodiment of the present invention. Here, the same components as those in FIG. In FIG. 1, a display processing unit 7 is provided instead of the display processing unit 5. The display processing unit 7 includes a bit value display unit 71 and a region display unit 72, displays the digital data waveform read by the control unit 4 on the display unit 6, displays the analysis result of the control unit 4, and the like. To display.

  The bit value display means 71 displays the data value of the frame displayed on the analysis result list display unit 30 as a bit value bit by bit near the waveform displayed on the zoom screen 20 (for example, below the corresponding waveform). To do.

  The area display unit 72 distinguishes between an area in which a waveform included in the frame displayed on the analysis result list display unit 30 is displayed and an area in which the waveform included in the frame is not displayed on the zoom screen 20 (for example, the background Change the color to distinguish).

The operation of such an apparatus will be described.
FIG. 2 is a display screen example of the display unit 6 after data analysis of signals on the SPI bus in the apparatus shown in FIG. Here, the same components as those in FIG.

  Since the operation until the control unit 4 reads the digital data obtained by measuring the analog data transmitted on the serial bus from the memory 2 or the hard disk 3 and performs the waveform analysis is the same as the apparatus shown in FIG.

  The display processing unit 7 displays the waveform of the input signal and the waveform analysis result on the main screen 10 of the display unit 6. In addition, the display processing unit 7 enlarges the area of the zoom box 11 designated by an operation from an operation unit (not shown) and displays it on the zoom screen 20. Furthermore, the analysis result of each frame is displayed on the analysis result list display unit 30 as necessary.

  When the position of the frame box 31 is changed by an operation from an operation unit (not shown), the display processing unit 7 changes the position of the zoom box 11 on the main screen 10 to start the frame data specified by the frame box 31. Is displayed at the center position of the zoom screen 20.

  Then, the bit value display means 71 displays the data value of the frame specified by the operation unit (not shown) as a bit value bit by bit under the waveform displayed on the zoom screen 20. For example, the data value “48” of the frame number “1” specified in the frame box 31 in FIG. 2 is represented by the binary bit value “01001000” and below the waveform representing the SPI bus data (the waveform of the second channel). In addition, it is displayed according to the edge of the clock.

  Further, the area designating unit 72 displays the background color of the area 2a in which the waveform included in the frame designated in the frame box 31 is displayed by changing it from the background color of the non-display area. For example, the background color of the region 2a is blue. The area where the data value of the frame specified in the frame box 31 is displayed is displayed in the same manner as the area 2a. That is, the background color is blue. The area where the frame data value is displayed refers to the area indicated by the frame box 31.

  Thus, since the bit value display means 71 displays a bit value in the vicinity of the displayed waveform, the waveform corresponding to the data value can be easily recognized visually. Thereby, the positional relationship between the data value and the waveform and each bit value of the waveform can be easily recognized one bit at a time, and the waveform can be easily analyzed visually.

  Further, the area display means 72 distinguishes and displays the area 2a where the waveform included in the frame specified in the frame box 31 is displayed and the area where the waveform included in the frame is not displayed. The corresponding waveform can be easily recognized visually. Thereby, the area | region which the data value has shown can be caught visually.

  Further, since the area display means 72 displays the area 2a in which the waveform included in the frame is displayed by changing the background color, the area 2a can be clearly distinguished by the color.

  Further, since the area display means 72 displays the area where the data value of the frame specified in the frame box 31 is displayed in the same manner as the area 2a, the relationship between the data value and the waveform can be easily recognized. .

[Second Example]
FIG. 3 is another example of the display screen of the display unit 6 after data analysis of signals on the SPI bus in the apparatus shown in FIG. Here, the same components as those shown in FIG. In the apparatus shown in FIG. 1, each of the bit value display means 71 and the area designation means 72 displays the bit value of the frame designated in the frame box 31 on the zoom screen 20, and the data value of the designated frame is displayed. The background color of the region 2a and the region 2a is changed. Regardless of the designation of the frame box 31, all the bit values of the waveform displayed on the zoom screen 20 are displayed, and the color is divided for each frame.

  That is, the bit value display means 71 displays all the data values of the frame displayed on the analysis result list display unit 30 one bit at a time under the waveform displayed on the zoom screen 20.

  The area designating unit 72 displays the entire zoom screen 20 in different areas 2a to 2d where the waveform of the frame is displayed for each frame. For example, the background colors of the areas 2a to 2d where the waveforms included in each frame are displayed are displayed in different colors. In each of the areas 2b to 2d, waveforms included in frames having frame numbers “−1”, “0”, and “2” are displayed. The background colors of the regions 2b to 2d are displayed in yellow, red, and green. Further, the area designating unit 72 displays the area where the data value of each frame is displayed in the same display as the areas 2a to 2d. That is, the background color of each of the areas in which the data values of the frame numbers “−1”, “0”, and “2” are displayed is displayed in yellow, red, and green.

  Thus, since the area display means 72 displays the display of the areas 2a to 2d in which the waveform included in the frame is displayed in different colors for each frame, the area indicated by each data value is easily distinguished. I can do this.

[Third embodiment]
A waveform display device that displays a waveform of data transmitted on a serial bus searches for a pattern of data having a desired data value and displays the waveform of the searched pattern (for example, Japanese Patent Application Laid-Open No. 2002-158679). Publication (paragraph numbers 0001 to 0006, Fig. 5) Fig. 4 is a block diagram showing a third embodiment of the present invention, in which the same components as those in Fig. 1 are given the same reference numerals and explanations are given. 1, a display processing unit 8 is provided instead of the display processing unit 7. The display processing unit 8 includes a bit value display unit 81 and a region display unit 82, and the digital data read by the control unit 4 is read out. Are displayed on the display unit 6, the analysis result of the control unit 4 is displayed on the display unit 6, and the search result of the control unit 4 is further displayed on the display unit 6.

  The bit value display means 81 displays the data value of the search pattern as a bit value bit by bit near the waveform displayed on the zoom screen 20 (for example, below the waveform). On the zoom screen 20, the area display unit 82 distinguishes between an area where the waveform included in the searched pattern is displayed and an area where the waveform is not displayed.

The operation of such an apparatus will be described.
FIG. 5 is a display screen example of the display unit 6 after the pattern search in the apparatus shown in FIG. Here, the same components as those in FIGS. 2 and 3 are denoted by the same reference numerals, and description thereof is omitted. The operation until the control unit 4 reads the digital data obtained by measuring the analog data transmitted on the serial bus from the memory 2 or the hard disk 3 and performs the waveform analysis is the same as that of the apparatus shown in FIG.

  The display processing unit 8 displays the waveform of the input signal and the waveform analysis result on the main screen 10 of the display unit 6. In addition, the display processing unit 8 enlarges the area of the zoom box 11 designated by an operation from an operation unit (not shown) and displays it on the zoom screen 20.

  A pattern for searching from an operation unit (not shown) (for example, “HLHL”. Note that “L” indicates a low level, “H” indicates a high level, and “L” and “H” are respectively Binary numbers “0” and “1”) and the target channel (for example, the first channel) are input.

  Then, the control unit 4 reads the digital data from the memory 2 or the hard disk 3 and searches for a pattern. Then, the display processing unit 8 displays on the zoom screen 20 the waveform of the searched pattern and the waveforms before and after that.

  Then, the bit value display means 81 displays the data value of the search pattern as a bit value (for example, “HLHL”) bit by bit under the waveform displayed on the zoom screen 20.

  Further, the area designating unit 72 displays the background color of the area 2e in which the waveform of the searched pattern is displayed by changing it from the background color of the display of the area that is not displayed. For example, the background color of the region 2e is blue.

  Thus, since the bit value display means 81 displays the bit value of the searched pattern in the vicinity of the displayed waveform, the waveform corresponding to the data value can be easily recognized visually. Thereby, the positional relationship between the data value and the waveform and each bit value of the waveform can be easily recognized one bit at a time, and the waveform can be easily analyzed visually.

  Further, since the area display means 82 distinguishes and displays the area 2e where the waveform included in the searched pattern is displayed and the area where the waveform included in the pattern is not displayed, the waveform corresponding to the data value of the searched pattern. Can be easily recognized visually. Thereby, the area | region which the data value has shown can be caught visually.

  Furthermore, since the area display means 82 changes the background color of the area 2e where the waveform included in the searched pattern is displayed, the area 2e can be clearly distinguished by the color.

In addition, this invention is not limited to this, The following may be sufficient.
In the apparatus shown in FIG. 1 and FIG. 4, the area display means 72 and 82 have shown the configuration in which the background color of the areas 2a to 2e is changed. However, the areas 2a to 2e are changed by the gray scale instead of the color. It may be displayed.

  Further, in the apparatus shown in FIGS. 1 and 4, the area display means 72 and 82 may display any background color of the areas 2a to 2e.

  In the apparatus shown in FIGS. 1 and 4, the area display unit 72 defines the entire vertical direction of the zoom screen 20 as the areas 2 a to 2 d, and the area display unit 82 includes the area 2 e including only the target channel in the vertical direction. However, the vertical direction may be either the whole or only the target channel.

  1 and FIG. 4, the bit value display means 71 and 81 are configured to display the bit value below the waveform. However, the bit value may be displayed on the waveform.

  In the apparatus shown in FIG. 1, the region display unit 72 has a configuration in which the analysis result list unit 30 displays the data value of each frame in a different manner by changing the region where the data value is displayed from another region. The area where the data value is displayed may not be displayed separately from other areas.

  Further, in the apparatus shown in FIG. 1, the configuration in which both the bit value display means 71 and the area display means 72 are provided is shown, but only one of them may be provided.

  In the apparatus shown in FIG. 4, the configuration in which both the bit value display unit 81 and the region display unit 82 are provided is shown. However, only one of them may be provided.

  Further, in the apparatus shown in FIG. 4, the configuration in which the display processing unit 8 displays the main screen 10 and the zoom screen 20 is shown, but the analysis result list display unit 30 is similar to the display processing unit 7 of the apparatus shown in FIG. May be displayed. Similarly to each of the bit value display means 71 and the area display means 72, the bit value display means 81 displays the data value of the frame to be displayed as a bit value bit by bit in the vicinity of the displayed waveform, The area display unit 82 may distinguish and display the area where the waveform included in the frame is displayed and the area where the waveform is not displayed.

It is the block diagram which showed the 1st Example of this invention. It is the figure which showed an example of the display of the apparatus shown in FIG. It is the figure which showed the other example of the display of the apparatus shown in FIG. It is the block diagram which showed the 3rd Example of this invention. It is the figure which showed an example of the display of the apparatus shown in FIG. It is a block diagram of the conventional waveform display apparatus. It is the figure which showed an example of the display of the apparatus shown in FIG.

Explanation of symbols

7, 8 Display processing unit 71, 81 Bit value display means 72, 82 Area display means

Claims (11)

In the waveform display device that displays a waveform of data transmitted on the serial bus and displays a plurality of data values of a frame that is a large delimiter of the data,
A waveform display device comprising bit value display means for displaying the data value of the displayed frame as a bit value bit by bit in the vicinity of the displayed waveform. In the waveform display device that displays a waveform of data transmitted on the serial bus and displays a plurality of data values of a frame that is a large delimiter of the data,
A waveform display device, comprising: an area display means for distinguishing and displaying an area in which a waveform included in the frame is displayed and an area in which the waveform included in the frame is not displayed. In the waveform display device that displays a waveform of data transmitted on the serial bus and displays a plurality of data values of a frame that is a large delimiter of the data,
A bit value display means for displaying the data value of the frame to be displayed as a bit value bit by bit in the vicinity of the displayed waveform;
A waveform display device, comprising: a region display means for distinguishing and displaying a region where a waveform included in the frame is displayed and a region where a waveform included in the frame is not displayed.   4. The waveform display device according to claim 2, wherein the area display means displays the area in which the waveform of the frame is displayed for each frame.   5. The waveform display apparatus according to claim 2, wherein the area display means displays the waveform of the frame by changing a color of the area.   6. The waveform display according to claim 2, wherein the area display means displays the area where the data value of the frame is displayed in the same manner as the area where the waveform of the frame is displayed. apparatus. In a waveform display device for searching for a pattern of data having a desired data value from data transmitted on the serial bus and displaying the waveform of the searched pattern.
A waveform display device comprising bit value display means for displaying the data value as a bit value bit by bit in the vicinity of the displayed waveform. In a waveform display device for searching for a pattern of data having a desired data value from data transmitted on the serial bus and displaying the waveform of the searched pattern.
2. A waveform display device, comprising: a region display means for distinguishing and displaying a region where a waveform included in the searched pattern is displayed and a region where a waveform included in the searched pattern is not displayed. In a waveform display device for searching for a pattern of data having a desired data value from data transmitted on the serial bus and displaying the waveform of the searched pattern.
Bit value display means for displaying the data value as a bit value bit by bit in the vicinity of the displayed waveform;
2. A waveform display device, comprising: an area display means for distinguishing and displaying an area in which a waveform included in the searched pattern is displayed and an area in which the waveform included in the searched pattern is not displayed.   10. The waveform display device according to claim 8, wherein the area display means displays the waveform of the pattern by changing the color of the area. The waveform display device according to claim 1, wherein the waveform display device is used in a waveform measurement device.

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