JP2016213680A - Waveform analysis support method, waveform analysis support program, and waveform analysis support device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a waveform analysis support method capable of identifying a bit pattern string which may cause a problem in transmission line analysis.SOLUTION: The waveform analysis support method causes a computer to execute a series of processing, including: to display a waveform graph, in which plural waveforms are overlapped with corresponding bit values in a piece of input data of plural bits, on a display screen; to receive a set of specifications of a position on the display screen; and to output a bit value of a bit corresponding to the waveform corresponding to the position of the specifications received on the plural waveforms and a bit value of a bit at least before or after the bit.SELECTED DRAWING: Figure 17

Description

  The present invention relates to a waveform analysis support method, a waveform analysis support program, and a waveform analysis support device.

  For example, in high-speed serial transmission analysis using an IBIS-AMI (I / O Buffer Information Specification Algorithmic Modeling Interface) model or the like, analysis is performed using a bit pattern of hundreds of millions of bits, so that a conventional transient waveform is displayed as an analysis result. In some cases, the analysis result becomes enormous. Therefore, in recent years, an eye pattern is displayed as an analysis result instead of an analysis using a transient waveform.

  As an analysis technique related to the eye pattern, a technique for automatically adjusting parameters related to transmission quality by comparing the waveform of the received data with a reference eye mask pattern and transmitting the comparison result data to the transmission source of the received data, mask In a transmission margin calculation process with placement restrictions, a technique for determining the position of the eye pattern on the time axis and determining the center as the center position of the mask is known.

International Publication No. 2009/019746 Pamphlet JP 2010-61207 A JP 2004-301673 A JP 2011-215681 A

  However, when displaying the eye pattern, the time information is dropped in order to display the eye pattern at high speed, and the waveform is superimposed and displayed every period (UI). Therefore, in the display of the eye pattern, the period of the waveform having a problem in quality cannot be known. For this reason, it is difficult to specify what bit pattern sequence is a problem.

  Therefore, in one aspect, the present invention aims to specify a bit pattern string at a designated position.

  According to one aspect, a waveform graph in which a plurality of waveforms each corresponding to each bit value of input multi-bit data is superimposed is displayed on a display screen, designation of a position on the display screen is accepted, A waveform in which a computer executes a process of outputting a bit value of a bit corresponding to a waveform corresponding to a position where the designation is received and a bit value of at least a bit before or after the bit among a plurality of waveforms An analysis support method is provided.

  Further, as means for solving the above-described problems, an apparatus for performing the above-described method, a program for causing a computer to execute the above-described processing, and a storage medium storing the program may be used.

  A bit pattern string at a designated position can be specified.

It is a figure which shows the example of a transient waveform by the difference in transmission speed. It is a figure which outlines an eye pattern display process. It is a figure for demonstrating the quality check of a waveform. It is a figure which shows the example of data of waveform data. It is a figure explaining the correspondence of eye pattern display and existing eye data. It is a figure for demonstrating the setting method of the value of eye data when there is no problem in waveform quality. It is a figure for demonstrating the setting method of the value of eye data when there exists a problem in waveform quality. It is a figure which shows the hardware constitutions of information processing apparatus. It is a figure which shows the function structural example of information processing apparatus. It is a flowchart for demonstrating the whole waveform analysis assistance process by a waveform analysis assistance process part. It is a flowchart for demonstrating the waveform data reading process by a waveform data reading part. It is a flowchart figure for demonstrating the eye data conversion process by an eye data conversion part. It is a flowchart for demonstrating the eye data output process by an eye data output part. It is a flowchart for demonstrating the waveform period display control process by a waveform period display control part. It is a figure which shows the example of a waveform data reading process. It is a figure which shows the example of a result of an eye data conversion process and an eye data output process. It is a figure which shows the example of a waveform period display control process.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. First, transmission line analysis using a transient waveform will be described. FIG. 1 is a diagram illustrating an example of a transient waveform due to a difference in transmission speed.

  FIG. 1A shows a case where the transmission speed is slow and a 10-bit bit pattern 1a is an analysis target. FIG. 1B shows a case where a bit pattern 51 of 200000 bits is to be analyzed in high-speed serial transmission. In FIG. 1A and FIG. 1B, the horizontal axis of each graph indicates analysis time.

  In contrast to the transient waveform 2a of the bit pattern 1a of FIG. 1A, the transient waveform 52p of the bit pattern 51 of FIG. 1B is densely condensed, and the shape of the waveform cannot be confirmed. In order to analyze the transient waveform 52p in FIG. 1B, the time axis unit is displayed in detail from microseconds to nanoseconds, but the processing time is enormous.

  Therefore, in recent years, as shown in FIG. 2, eye pattern display with time information dropped has become mainstream. An outline of eye pattern display will be described. FIG. 2 is a diagram outlining the eye pattern display processing.

  FIG. 2A corresponds to FIG. FIG. 2B shows an example of the transient waveform 52p obtained by analyzing the transient waveform 52p with a processing time of nanoseconds. By overlapping the waveforms for each period (UI: Unit Interval) of the transient waveform 52p, time information is dropped and the eye pattern is displayed at high speed.

  FIG. 2C shows an example of the eye pattern display 6. In the eye pattern display 6, the horizontal axis indicates one cycle (UI), and the vertical axis indicates voltage. In the eye pattern display 6, for example, it is easy to visually recognize that the waveform density increases in the order of blue, light blue, green, yellow, orange, and red.

  The quality check of the input waveform based on the eye pattern display 6 by the designer will be described. FIG. 3 is a diagram for explaining the waveform quality check. FIG. 3A shows an example of an eye diagram. The eye diagram 7 is shown as a hexagon.

  FIG. 3B shows a central portion including the region of the eye diagram 7 in the eye pattern display 6 shown in FIG. An eye diagram 7 as illustrated in FIG. 3A is superimposed on this central portion.

  An indicator of the waveform quality check is determined by whether or not the waveform exists inside the eye diagram 7. The waveform outside the eye diagram 7 is determined to be a waveform having no quality problem, and the waveform inside the eye diagram 7 is determined to be a waveform having a quality problem. For example, the waveform is shown in the region 7e in the eye diagram 7.

  By displaying the eye diagram 7 in an overlapping manner, it can be seen that there is a waveform having a quality problem. However, it is impossible to know which period (UI) bit pattern is a waveform having a quality problem.

  Data obtained in such an existing process for displaying an eye pattern will be described with reference to FIGS.

  FIG. 4 is a diagram illustrating an example of waveform data. The waveform data file 52 representing the transient waveform 52p is a CSV (Comma-Separated Values) format in which the time and voltage obtained from the transient waveform 52p are separated by commas and waveform data representing the voltage at each time is recorded for each line. Etc. are data files.

  FIG. 5 is a diagram for explaining the correspondence between eye pattern display and existing eye data. In FIG. 5, the existing eye data is indicated by first eye data 54.

  In FIG. 5, the eye pattern display 6 is divided into a lattice shape as indicated by a division 8. Then, first eye data 54 in CSV format or the like in which the number of waveforms that have passed (hereinafter referred to as “number of waveform passes”) is separated for each lattice in a predetermined order is created. As can be seen from the first eye data 54, time information is not included.

  Next, the second eye data 56 including time information, that is, a cycle (UI) according to the present embodiment will be described with reference to FIGS. FIG. 6 is a diagram for explaining a method for setting the value of eye data when there is no problem in waveform quality.

  In FIG. 6, the number of waveform passes of the first eye data 54 is set to 0 for each lattice corresponding to a portion where the waveforms shown on the outside of the eye diagram 7 in the eye pattern display 6 are dense. That is, in the first eye data 54, when the number of waveform passes indicates 2 or more, the value of the lattice is set to 0.

  For example, in the data example of the first eye data 54, the number of waveform passages “4310”, “4310”, “2928”, “1690” and the like indicating 2 or more are each replaced with 0. By clearing to zero, the amount of data can be compressed. Data 56a represents an example of data after zero clear in the first eye data 54. In the data 56a, only the values “0” and “1” remain.

  FIG. 7 is a diagram for explaining a method of setting the value of eye data when there is a problem with the waveform quality. In the eye pattern display 6, waveform information having a problem in quality in which the waveform is specifically output is necessary.

  In FIG. 7, the waveforms 7e-1, 7e-2, 7e-3, 7e-4, and 7e-5 shown inside the eye diagram 7 of the eye pattern display 6 are considered to have a problem in quality. Therefore, waveform information is required for detailed analysis.

  Waveforms 7e-1, 7e-2, 7e-3, 7e-4, 7e-5, and the like correspond to lattices indicating the value “1” in the data 56a after the zero clear. Therefore, the grid whose number of waveform passes is 1 is replaced with a period (UI) corresponding to time information.

  The second eye data 56 according to the present embodiment is acquired by replacing the number of waveform passages with a period (UI). In this example, “601” period, “3001” period, “4509” period, “2107” period, “198731” period, “90642” period, etc., for the lattice indicating the number of waveform passes “1” in the data 56a. Is shown. The second eye data 56 may be a data file such as a CSV format.

  Therefore, if a lattice is specified in the eye pattern display 6, it is possible to verify at which period the problem occurs in the waveform quality.

  The information processing apparatus 100 according to the present embodiment that realizes the above has a hardware configuration as shown in FIG. FIG. 8 is a diagram illustrating a hardware configuration of the information processing apparatus. In FIG. 8, an information processing apparatus 100 is an information processing apparatus controlled by a computer, and includes a CPU (Central Processing Unit) 11, a main storage device 12, an auxiliary storage device 13, an input device 14, and a display device. 15, a communication I / F (interface) 17, and a drive device 18 are connected to the bus B.

  The CPU 11 controls the information processing apparatus 100 according to a program stored in the main storage device 12. The main storage device 12 uses a RAM (Random Access Memory), a ROM (Read Only Memory) or the like, and is obtained by a program executed by the CPU 11, data necessary for processing by the CPU 11, and processing by the CPU 11. Store or temporarily store the data.

  The auxiliary storage device 13 uses an HDD (Hard Disk Drive) or the like, and stores data such as programs for executing various processes. A part of the program stored in the auxiliary storage device 13 is loaded into the main storage device 12 and executed by the CPU 11, whereby various processes are realized.

The input device 14 includes a mouse, a keyboard, and the like, and is used for a user to input various information necessary for processing by the information processing device 100. The display device 15 displays various information required under the control of the CPU 11. The input device 14 and the display device 15 may be a user interface such as an integrated touch panel. The communication I / F 17 performs communication through a wired or wireless network. Communication by the communication I / F 17 is not limited to wireless or wired.
A program that implements processing performed by the information processing apparatus 100 is provided to the information processing apparatus 100 by a storage medium 19 such as a CD-ROM (Compact Disc Read-Only Memory).

  The drive device 18 performs an interface between the information processing device 100 and a storage medium 19 (for example, a CD-ROM) set in the drive device 18.

  Further, the storage medium 19 stores a program that realizes various processes according to the present embodiment described later, and the program stored in the storage medium 19 is installed in the information processing apparatus 100 via the drive device 18. Is done. The installed program can be executed by the information processing apparatus 100.

  The storage medium 19 for storing the program is not limited to a CD-ROM, but one or more non-transitory tangible media having a structure that can be read by a computer. If it is. As a computer-readable storage medium, in addition to a CD-ROM, a portable recording medium such as a DVD disk or a USB memory, or a semiconductor memory such as a flash memory may be used.

  The program includes a program that causes the CPU 11 to perform various processes according to the present embodiment described in detail below.

  The information processing apparatus 100 corresponds to a waveform analysis support apparatus that performs waveform analysis support processing, and has a functional configuration as shown in FIG. FIG. 9 is a diagram illustrating a functional configuration example of the information processing apparatus. In FIG. 9, the information processing apparatus 100 includes a waveform analysis support processing unit 40. The waveform analysis support processing unit 40 is realized by the CPU 11 executing a corresponding program.

  The storage unit 130 stores a bit pattern 51, a waveform data file 52, first eye data 54, second eye data 56, a bit display rule 59, and the like.

  The waveform analysis support processing unit 40 is a processing unit that performs the eye pattern display 6, and includes a waveform data reading unit 41, an eye data conversion unit 42, an eye data output unit 43, an eye pattern display unit 44, and a waveform cycle display. And a control unit 45.

  The waveform data reading unit 41 stores waveform data indicating the time and voltage of each row of the waveform data file 52, and the bit number calculated by the time and the bit width indicated by the waveform data, and a WaveTable [] having a waveform table structure. It memorize | stores in the memory | storage part 130 by an arrangement | sequence.

  The waveform table structure has at least three elements: two elements each of time and voltage obtained from the waveform data file 52 and an element indicating a bit number corresponding to a period (UI). The time, voltage, and bit number of the waveform data for one row are indicated by each element of the WaveTable [] array.

  The eye data conversion unit 42 creates a matrix [] [] of a two-dimensional array having a matrix structure from the time and voltage indicated by each WaveTable array and stores them in the storage unit 130.

  The matrix structure has an element indicating a pointer to the WaveTable [] array for each rectangle by the division 8 for the eye pattern display 6. The Wave [] array described later corresponds to this element. When a plurality of waveforms pass through the same rectangle, a plurality of pointers to the WaveTable [] array are indicated by the matrix [] [] array of the rectangles. That is, i in the last Wave [i] array indicates the number of waveform passes.

  There are as many matrix [] [] as the number of rectangles in the division 8 of the eye pattern display 6. In the case of matrix [m] [n], m represents a rectangular number in the horizontal axis direction of the eye pattern display 6 and n represents a rectangular number in the vertical axis direction.

  The eye data output unit 43 creates the first eye data 54 and the second eye data 56 in the storage unit 130 using the matrix [] [] and WaveTable [] arrays. The first eye data 54 corresponds to existing eye data in which the number of waveform passes of each rectangle in the division 8 (FIG. 5) of the eye pattern display 6 is set. In the second eye data 56, a bit number is set for a rectangle having a waveform passage number “1”, and 0 is set for a rectangle other than the waveform passage number “1”. Eye data. By setting a bit number in the second eye data 56, the period (UI) of the waveform in question is specified.

  The eye pattern display unit 44 refers to the waveform data file 52 and performs the eye pattern display 6 on the display device 15.

  The waveform cycle display control unit 45 specifies a grid corresponding to the position of the mouse according to the movement of the designer's mouse on the eye pattern display 6, and stores the second eye data 56 and the first eye data 54. With reference to the number of waveform passages of the specified lattice, any one of the display of the number of waveform passages, the display of the bit pattern string, or the absence of display is performed.

  By referring to the second eye data 56 and the first eye data 54, tool tip display control based on the number of waveform passages can be performed in real time for the mouse movement on the eye pattern display 6.

  The bit pattern 51 is data indicating the received bit pattern sequence, and may be a data file.

  The waveform data file 52 is a data file that stores data relating to an input waveform representing the bit pattern 51, and indicates a voltage for each time.

  The first eye data 54 indicates the number of waveform passes for each rectangle in the eye pattern display 6 and corresponds to a density distribution.

  The second eye data 56 is eye data having time information indicating a bit number corresponding to a period (UI) only when one waveform passes through, and indicating the other as 0.

The bit display rule 59 is data in which the number of bits to be displayed is determined according to the conversion type of the input waveform. The conversion type is a type of data transmission encoding in the high-speed serial transfer method. As an example of the bit display rule 59, the conversion type is
・ In the case of 8b / 10b, a bit number and a total of 15 bits including 7 characters before and after the bit number are displayed.
In the case of 64b / 66b, a bit number and a total of 127 bits including 63 characters before and after the bit number are displayed, and
In the case of 128b / 130b, it is defined to display a bit number and a total of 254 bits including 127 characters before and after the bit number. The bit display rule 59 may be a part of a program that realizes the waveform cycle display control unit 45.

  Next, the processing units 41 to 43 and 45 will be described with reference to FIGS. The eye pattern display process by the eye pattern display unit 44 is an existing process for performing the eye pattern display 6 based on the waveform data file 52, and thus detailed description thereof is omitted.

  FIG. 10 is a flowchart for explaining the entire waveform analysis support processing by the waveform analysis support processing unit. In FIG. 10, the waveform analysis support processing unit 40 performs the waveform data reading process by the waveform data reading unit 41 (step S10). A WaveTable [] array having a waveform table structure is created in the storage unit 130.

  Next, eye data conversion processing is performed by the eye data conversion unit 42 (step S20). A matrix [] [] array having a matrix structure in which a WaveTable [] array having a waveform table structure and a lattice of the eye pattern display 6 are associated is created in the storage unit 130.

  Further, eye data output processing is performed by the eye data output unit 43 (step S30). First eye data 54 and second eye data 56 are created in the storage unit 130.

  The eye pattern display unit 44 performs an eye pattern display process based on each waveform data in the waveform data file 52 (step S40). An eye pattern display 6 is displayed on the display device 15.

  Then, the waveform cycle display control unit 45 performs a waveform cycle display control process according to the movement of the mouse on the eye pattern display 6 (step S50). Based on the number of waveform passes acquired by referring to the matrix [] [] array corresponding to the grid corresponding to the mouse position, either display of the number of waveform passes, display of the bit pattern string, or no display Is done. When the bit pattern string is displayed, the bit pattern string is acquired from the bit pattern 51 with the number of bits according to the bit display rule 59 and displayed on the display device 15.

  Thereafter, when the eye pattern display 6 ends, the waveform analysis support process ends. Next, the waveform data reading process by the waveform data reading unit 41 will be described.

  FIG. 11 is a diagram for explaining the waveform data reading process by the waveform data reading unit. In FIG. 11, the waveform data reading unit 41 opens the waveform data file 52 stored in the storage unit 130 (step S101).

  Then, the waveform data reading unit 41 performs steps S103 to S105 for each line of the waveform data file 52. When the processing is completed for all the lines, the waveform data file 52 is closed (step S106). End the reading process.

  The waveform data reading unit 41 acquires time and voltage from the waveform data obtained by reading one line from the waveform data file 52 (step S103), newly generates a WaveTable [] array having a waveform table structure, The acquired time and voltage are set (step S104). The waveform table structure has elements such as time, voltage, and bit number. In the WaveTable [] array, the acquired time and voltage are set as element values.

The waveform data reading unit 41 also calculates a bit number, and sets the calculated bit number in the bit number element of the WaveTable [] array (step S105). The bit number is
Bit number = QUOTIENT (time [n] / bit width) +1 (1)
Sought by. QUOTIENT is a function that returns the integer part of the division quotient.

  When the processing in steps S103 to S105 described above is completed for all waveform data in the waveform data file 52, the waveform data reading unit 41 closes the waveform data file 52 (step S106) and performs this waveform data reading processing. finish.

  FIG. 12 is a flowchart for explaining eye data conversion processing by the eye data conversion unit. In FIG. 12, the eye data conversion unit 42 secures a matrix [] [] array area having a matrix structure for storing eye data in the storage unit 130 (step S201). A matrix [] [] array area corresponding to the number of grids in section 8 is secured.

  The eye data conversion unit 42 reads the WaveTable [] array one by one from the storage unit 130 and performs steps S203 to S204. When the processing is completed for all the WaveTable [] arrays, the eye data conversion unit 42 The eye data conversion process ends.

  The eye data conversion unit 42 acquires time and voltage from one WaveTable [] array read from the storage unit 130, and calculates m and n of the matrix [m] [n] array from the time and voltage ( Step S203).

  The eye data conversion unit 42 sets a pointer to the WaveTable [] array related to the waveform passing through the Wave [i] array (step S204). No pointer is set in the matrix [] [] array for a rectangle that does not pass any waveform. When the process is completed for all the WaveTable [] arrays, the eye data conversion unit 42 ends the eye data conversion process.

  FIG. 13 is a flowchart for explaining eye data output processing by the eye data output unit. In FIG. 13, the eye data output unit 43 reads matrix [] [] array having a matrix structure one by one from the storage unit 130, and performs steps S302 to S306.

  The eye data output unit 43 reads matrix [] [] arrays one by one from the storage unit 130, performs steps S302 to S303 (corresponding to S304 to S306), and processes all the matrix [] [] arrays. When completed, the eye data output unit 43 ends the eye data output process.

  The eye data output unit 43 outputs i (total number of waveforms passed) of the waveform specifying element Wave [i] of the matrix [] [] array read from the storage unit 130 to the first eye data (step S302). Here, when the waveform specifying element Wave [i] does not exist, 0 is output to the first eye data to indicate that there is no waveform passed. This step S302 corresponds to existing processing.

  The eye data output unit 43 performs the process in step S303 according to the present embodiment. The eye data output unit 43 determines whether i (total number of waveforms passed) of the waveform specifying element Wave [i] of the matrix [] [] array read from the storage unit 130 is 2 or more (step S304). ). When i of the waveform specifying element Wave [i] is 2 or more (YES in step S304), the eye data output unit 43 outputs 0 to the second eye data 56 (step S305).

  On the other hand, when i of the waveform specifying element Wave [i] is not 2 or more (NO in step S304), the eye data output unit 43 points to the second eye data 56 by the waveform specifying element Wave [i]. [] [] The bit number of the array is output (step S306).

  Here, when the waveform specifying element Wave [i] does not exist, the eye data output unit 43 outputs 0 to the second eye data to indicate that there is no waveform passed.

  When the process described above is completed for all matrix [] [] arrays, the eye data output unit 43 ends the eye data output process.

  FIG. 14 is a flowchart for explaining waveform cycle display control processing by the waveform cycle display control unit. In FIG. 14, the waveform cycle display control unit 45 specifies a grid where the mouse is positioned on the eye pattern display 6 (step S <b> 501).

  The waveform cycle display control unit 45 acquires a bit number corresponding to the specified lattice from the second eye data 56 (step S502), and determines whether or not the acquired bit number is 0 (step S503). ).

  If the bit number is not 0 (NO in step S502), the waveform cycle display control unit 45 includes the bit value of the bit number acquired from the bit pattern 51 based on the conversion type of the input waveform, and the previous and subsequent bits. A bit pattern string indicating a value is acquired and displayed on the display device 15 together with the bit number (step S504).

  On the other hand, if the bit number is 0 (YES in step S502), the waveform cycle display control unit 45 acquires the number of waveform passes from the first eye data 54 based on the bit number and displays it (step S505).

  After the process of step S504 or S505, the waveform cycle display control unit 45 determines whether or not the process is finished (step S506). If not completed (NO in step S506), the waveform cycle display control unit 45 returns to step S501 and repeats the same processing as described above. On the other hand, in the case of the end (YES in step S506), that is, when the designer ends the eye pattern display 6, the waveform cycle display control unit 45 ends the waveform cycle display control process.

  Next, processing examples by the waveform analysis support unit 40 will be described with reference to FIGS. 15 to 17. FIG. 15 is a diagram illustrating an example of waveform data reading processing. In FIG. 15, the waveform data reading unit 41 reads waveform data line by line from the waveform data file 52, calculates the bit number from the time and voltage, and further calculates the time and voltage of the waveform data, and the calculated bit number. Is stored in the WaveTable [] array.

  In the data example of the waveform data file 52 in FIG. 15, the waveform data reading unit 41 uses the time “0.0” and the voltage “0.0” at that time to calculate the bit number “1” using Expression (1). To get. Times “0.2”, “0.4”, “0.6”, and “0.8” and respective voltages “1.5”, “3.0”, “3.0”, and “ Similarly, the bit number “1” is calculated from “1.5”.

  Also, from the time “1.0” and the voltage “0.0” at that time, the bit number “2” is acquired using the equation (1). By such waveform data reading processing, WaveTable [] arrays for the number of rows of waveform data are created.

  FIG. 16 is a diagram illustrating a result example of the eye data conversion process and the eye data output process. In FIG. 16, the eye data conversion process (FIG. 12) and the eye data output process (FIG. 13) associate each grid with the waveform data relating to the passing waveform for each grid that divides the eye pattern display 6.

  For example, the matrix [2] [10] array indicates that “4013” waveforms pass through the lattice (2, 10) in the eye pattern display 6. The waveform data of each of 4013 waveforms is indicated by the WaveTable [] array pointed to by the wave [] array.

  In the first eye data 54, the number of wave [] arrays of matrix [2] [10] arrays, that is, “4013” is set for the lattice (2, 10). Similarly, for the lattice (3, 4), the number of wave [] in the matrix [3] [4] array, that is, “1” is set.

  In the second eye data 56, for the grid (3, 4), the matrix [3] [4] array is only the wave [1] array, so the bit number of the WaveTable [] pointed to by the wave [1] “90642” is set. In the second eye data 56, when no matrix [] [] array is set for the wave [] array, and when two or more wave [] arrays are set, 0 is set for the lattice. Has been.

  FIG. 17 is a diagram illustrating an example of a waveform cycle display control process. In FIG. 17, when the mouse position operated by the designer is the lower left rectangle (2, 4) of the eye pattern display 6, the bit number “198731” is indicated by the second eye data 56. A bit pattern string “100101000100011” indicating the bit values before and after the bit value “198731” from the head is displayed around the mouse position on the eye pattern display 6 together with the bit number “198731”. Tooltip display is performed based on the second eye data 56 and the bit pattern 51.

  When the mouse position is the upper right rectangle (j, k) of the eye pattern display 6 and the second eye data 56 indicates 0, the waveform passing number “12274” obtained by referring to the first eye data 54 is displayed. Is displayed around the mouse position on the eye pattern display 6. Tooltip display is performed based on the second eye data 56 and the first eye data 54.

  Further, when the mouse position is in a rectangle around the center of the eye pattern display 6 and the second eye data 56 is referred to, 0 is indicated. With reference to the first eye data 54, the waveform passing number “0” is displayed. Neither the number of waveform passages nor the bit pattern string is displayed. Tooltip display is suppressed based on the second eye data 56 and the first eye data 54.

  As described above, in addition to the existing first eye data 54, the second eye data 56 according to the present embodiment can be created and used, which can be realized by using the existing first eye data 54. The bit pattern string including the bit value of the bit number corresponding to the time information of the waveform in question and the bit values before and after that can be displayed in a tooltip at high speed in real time.

  The present invention is not limited to the specifically disclosed embodiments, and can be principally modified and changed without departing from the scope of the claims.

Regarding the above embodiment, the following additional notes are disclosed.
(Appendix 1)
A waveform graph in which a plurality of waveforms corresponding to each bit value of input multi-bit data is superimposed is displayed on the display screen,
Accepts designation of a position on the display screen;
Out of the plurality of waveforms, the bit value corresponding to the waveform corresponding to the position where the designation is received, and the bit value of the bit at least before or after the bit are output,
A waveform analysis support method, wherein a computer executes processing.
(Appendix 2)
Of a plurality of areas defined in the display screen, a bit value of a bit corresponding to a waveform crossing an area corresponding to the position where the designation is received, and a bit value of a bit at least before or after the bit, The waveform analysis support method according to appendix 1, wherein:
(Appendix 3)
If the number of waveforms crossing the region corresponding to the position where the designation is received is less than a predetermined number, the bit value of the bit corresponding to the waveform crossing the region and the bit of the bit at least before or after the bit Output the value,
The waveform analysis support method according to Supplementary Note 2, wherein:
(Appendix 4)
In the first data indicating the number of waveforms crossing the region for each lattice, a value where the waveform crossing the region is greater than or equal to the predetermined number is replaced with zero, and a value less than the predetermined number is replaced with the plurality of bits. Create the second data replaced with the bit number in the data,
With reference to the generated second data, when the number of waveforms crossing the region indicates a bit number, a bit value of a bit specified by the bit number from the plurality of bits of data, and at least of the bits Output the bit value of the previous or subsequent bit,
The waveform analysis support method according to Supplementary Note 3, wherein
(Appendix 5)
The waveform graph is an eye pattern.
The waveform analysis support method according to any one of appendices 1 to 4, characterized in that:
(Appendix 6)
A waveform graph in which a plurality of waveforms corresponding to each bit value of input multi-bit data is superimposed is displayed on the display screen,
Accepts designation of a position on the display screen;
Out of the plurality of bits, information for identifying bits corresponding to the waveform corresponding to the position where the designation is received is output.
A waveform analysis support method, wherein a computer executes processing.
(Appendix 7)
Outputs information for identifying bits corresponding to a waveform that intersects an area corresponding to a position where the designation is received among a plurality of areas defined in the display screen.
The waveform analysis support method according to appendix 6, characterized in that:
(Appendix 8)
If the number of waveforms crossing the area corresponding to the position where the designation is received is less than a predetermined number, information identifying the bit is output;
The waveform analysis support method according to appendix 7, characterized by:
(Appendix 9)
In the first data indicating the number of waveforms crossing the region for each lattice, a value where the waveform crossing the region is greater than or equal to the predetermined number is replaced with zero, and a value less than the predetermined number is replaced with the plurality of bits. Create the second data replaced with the bit number in the data,
With reference to the generated second data, when the number of waveforms crossing the region indicates a bit number, a bit value of a bit specified by the bit number from the plurality of bits of data, and at least of the bits Output the bit value of the previous or subsequent bit,
9. The waveform analysis support method according to appendix 8, wherein
(Appendix 10)
The waveform graph is an eye pattern.
The waveform analysis support method according to any one of appendices 6 to 8, characterized in that:
(Appendix 11)
A waveform graph in which a plurality of waveforms corresponding to each bit value of input multi-bit data is superimposed is displayed on the display screen,
Accepts designation of a position on the display screen;
Out of the plurality of waveforms, the bit value corresponding to the waveform corresponding to the position where the designation is received, and the bit value of the bit at least before or after the bit are output,
A waveform analysis support program characterized by causing a computer to perform processing.
(Appendix 12)
A waveform graph in which a plurality of waveforms corresponding to each bit value of input multi-bit data is superimposed is displayed on the display screen,
Accepts designation of a position on the display screen;
Out of the plurality of bits, information for identifying bits corresponding to the waveform corresponding to the position where the designation is received is output.
A waveform analysis support program characterized by causing a computer to perform processing.
(Appendix 13)
A display unit that displays a waveform graph in which a plurality of waveforms respectively corresponding to each bit value of input multi-bit data are superimposed on the display screen;
An output unit that receives designation of a position on the display screen, and outputs information for identifying a bit corresponding to a waveform according to the position at which the designation is received among the plurality of bits;
A waveform analysis support apparatus characterized by comprising:
(Appendix 14)
A display unit that displays a waveform graph in which a plurality of waveforms respectively corresponding to each bit value of input multi-bit data are superimposed on the display screen;
Receiving a designation of a position on the display screen, and among the plurality of bits, an output unit for identifying information corresponding to a waveform corresponding to a position in which the designation is accepted;
A waveform analysis support apparatus characterized by comprising:

11 CPU
DESCRIPTION OF SYMBOLS 12 Main memory device, 13 Auxiliary memory device 14 Input device, 15 Display device 17 Communication I / F, 18 Drive device 19 Storage medium 40 Waveform analysis support processing part, 41 Waveform data reading part 42 Eye data conversion part, 43 Eye data output Unit 44 eye data display unit 45 waveform cycle display control unit 51 bit pattern 52 waveform data file 54 first eye data 56 second eye data 59 bit display rule 100 information processing device 130 storage unit

Claims (12)

A waveform graph in which a plurality of waveforms corresponding to each bit value of input multi-bit data is superimposed is displayed on the display screen,
Accepts designation of a position on the display screen;
Out of the plurality of waveforms, the bit value corresponding to the waveform corresponding to the position where the designation is received, and the bit value of the bit at least before or after the bit are output,
A waveform analysis support method, wherein a computer executes processing. Of a plurality of areas defined in the display screen, a bit value of a bit corresponding to a waveform crossing an area corresponding to the position where the designation is received, and a bit value of a bit at least before or after the bit, The waveform analysis support method according to claim 1, wherein: If the number of waveforms crossing the region corresponding to the position where the designation is received is less than a predetermined number, the bit value of the bit corresponding to the waveform crossing the region and the bit of the bit at least before or after the bit Output the value,
The waveform analysis support method according to claim 2, wherein: The waveform graph is an eye pattern.
The waveform analysis support method according to any one of claims 1 to 3, wherein A waveform graph in which a plurality of waveforms corresponding to each bit value of input multi-bit data is superimposed is displayed on the display screen,
Accepts designation of a position on the display screen;
Out of the plurality of bits, information for identifying bits corresponding to the waveform corresponding to the position where the designation is received is output.
A waveform analysis support method, wherein a computer executes processing. Outputs information for identifying bits corresponding to a waveform that intersects an area corresponding to a position where the designation is received among a plurality of areas defined in the display screen.
The waveform analysis support method according to claim 5, wherein: If the number of waveforms crossing the area corresponding to the position where the designation is received is less than a predetermined number, information identifying the bit is output;
The waveform analysis support method according to claim 6. The waveform graph is an eye pattern.
The waveform analysis support method according to any one of claims 5 to 7, A waveform graph in which a plurality of waveforms corresponding to each bit value of input multi-bit data is superimposed is displayed on the display screen,
Accepts designation of a position on the display screen;
Out of the plurality of waveforms, the bit value corresponding to the waveform corresponding to the position where the designation is received, and the bit value of the bit at least before or after the bit are output,
A waveform analysis support program characterized by causing a computer to perform processing. A waveform graph in which a plurality of waveforms corresponding to each bit value of input multi-bit data is superimposed is displayed on the display screen,
Accepts designation of a position on the display screen;
Out of the plurality of bits, information for identifying bits corresponding to the waveform corresponding to the position where the designation is received is output.
A waveform analysis support program characterized by causing a computer to perform processing. A display unit that displays a waveform graph in which a plurality of waveforms respectively corresponding to each bit value of input multi-bit data are superimposed on the display screen;
An output unit that receives designation of a position on the display screen, and outputs information for identifying a bit corresponding to a waveform according to the position at which the designation is received among the plurality of bits;
A waveform analysis support apparatus characterized by comprising: A display unit that displays a waveform graph in which a plurality of waveforms respectively corresponding to each bit value of input multi-bit data are superimposed on the display screen;
Receiving a designation of a position on the display screen, and among the plurality of bits, an output unit for identifying information corresponding to a waveform corresponding to a position in which the designation is accepted;
A waveform analysis support apparatus characterized by comprising: