JPH0443745A - Retrieving method for collection data - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a method for searching acquired data, such as a protocol analyzer. , the data at the specified time,
This article aims to provide a search method for recorded data that allows you to search for the desired data in a short amount of time.

[Prior Art] A conventional method of searching acquired data will be described. Taking a protocol analyzer as an example, the data and additional information included in each frame, which is a divided section of transmission, and the end time of that frame are written to the data acquisition memory, and the data is played back and displayed. In some cases, the desired data is searched from the address or time set in advance for the data, read out from the data acquisition memory, and reproduced and displayed.

[Problem to be solved by the invention F] In such a conventional example, when specifying an address to access the data acquisition memory and retrieve data, the address set for the data is changed to the address of the data acquisition memory. By converting, the desired data can be easily retrieved.

However, when specifying the time of data acquisition and retrieving data at that time, a large amount of data is sequentially searched from the beginning or end of the data acquisition memory, and the acquisition time included in the data is searched sequentially from the beginning or end of the data acquisition memory. There was a problem that needed to be solved in that it took a long time from the instruction to start the playback operation until the data was displayed.

[Means for Solving Problem 1] In order to solve such problems, the present invention has been made, and when storing the data and additional information of each frame in the data acquisition memory, , writes the address of predetermined data of the previous or next frame in the data acquisition memory in addition to the end time of that frame, detects tense information according to this address and data, and acquires the target data. I started searching for .

[Operation] By using such a means, when trying to reproduce and display data at a specified time, the predetermined data of the previous or next frame stored and stored for each frame can be reproduced. The end time of the next frame to be searched can be immediately obtained by sequentially searching the write address of the frame and comparing it with the specified time. Now you can retrieve the desired data in a short time.

1 Example J A circuit configuration of an embodiment of the present invention is shown in FIG. 1 and will be described.

FIG. 1 shows the circuit configuration of the protocol analyzer according to the present invention, and the input serial data is
The data is input to the serial-to-parallel conversion circuit 11 via the serial data line 20 and converted into parallel data. The obtained parallel data is input to the analysis circuit 12 via the parallel data bus 21. The analysis circuit 12 distinguishes input data into frame data (information related to frame data) and data other than frame data, and also distinguishes between frame data and data accompanying data other than frame data. Additional information such as errors is created.Each data and each additional information identified by the analysis circuit 12 are written to the data acquisition memory 15 via the parallel data and additional information bus 22, and at the same time, the address・Register 1
4 and the time register 15. The address register 14 detects the end of a frame because the continuous data string changes from frame data to data other than frame data. Therefore, the address register 14 temporarily stores the unread address in the memory for data acquisition of the final data as the λ-included address of the previous frame. The address data held in the address register 14 is stored in the data acquisition memory 15.

On the other hand, since the data string changes from frame data to data other than frame data, the time register 13 detects the end of the frame and temporarily stores the end time of the frame. Then address register 14 becomes 1.
After writing the write address of the previous frame into the data acquisition memory 15, the time register 13 writes the end time of the current frame into the data acquisition memory 15.

That is, the address storing the end time of the previous frame and the end time of the current frame are stored.

By repeating the above operation, the serial data input via the serial data line 20 (data and additional information included in each frame, together with the write address of the previous frame and the end time of the frame) The data is sequentially written into the data acquisition memory 15.

Therefore, when the data reproduction operation is started, the reproduction display control circuit 16 reads the written data and additional information from the data acquisition memory 15 from a preset address or time.

The read data contents are analyzed by the analysis circuit 12 according to a predetermined analysis method to create display data, which is displayed on the display circuit 17.

FIG. 2 shows the contents of the data acquisition memory 15 of the data and various information acquired by the above circuit operations (a);
and the address (b) where its contents are stored. Here, for example, data acquisition memory 1 in (a)
Contains 5 contents. (1)~D. (J), is the address A (+2) to A, (
−m−1), and FD (1) to FD (m>,
A, T.

n n n-1
indicates that they are stored in A, (-m) to A, (-1>, Ao, A, (+1), respectively).

In FIG. 2 (a), data and various information are mainly explained in frame F. Analysis circuit 12 (FIG. 1)
There is a lot of data other than frame data and additional information that is output. After that, frame data and additional information FD of frame Fn are written.

Next, the previous frame F held by the address register 14. Address An-1 of address data An-2 of -1 is written, and then the end time Tn of that frame F is written. And the frame of
Data other than data and additional information. , transition to 1.

As described above, data and various information in the arrangement shown in FIG. 2(a) are sequentially written into the data acquisition memory 15 at the addresses shown in FIG. 2(b).

Therefore, in the reproduction display operation by the circuit shown in FIG. When specifying , use the address A shown in FIG. 2(b). If you specify
, FD , A, -1°n T, can be easily reproduced and displayed one after another.

You can also specify the time and get various information, FD.

An-1' When retrieving n, start the search from the end of the data acquisition memory 15 and search for the write address A of the previous frame F.-1 written for each frame F.- 1 is obtained. Then, the end time T.-1 of the frame written at address An-1 is detected and it is determined whether this is the specified time. In this way, the acquisition time is Time information can be detected without searching the FD for irrelevant information.

The designated time is searched from the end time of the frame thus detected, and the target data is retrieved and reproduced and displayed. Therefore, among the various data stored in the data acquisition memory 15, only the time information is searched, so that the time required to retrieve the target data can be extremely shortened.

In view of the above, in the data acquisition memory 15, 1
The rich address An-1 of the previous frame is
The case where the data and its additional information are written after FDo has been described, but as shown in FIG. 3(a), for example, in the case of a frame Fn, data other than the frame data and additional information are written. When changing from FD to frame data and additional information FD, the address data An-1 and time information are changed in advance. Space to write data and additional information. When it changes to +1, that space S. Write address A of the previous frame F, -1. -1 and its frame F. end time T.

It is also possible to write .

Also, as shown in FIG. 3(b), the framed address A, +1 and its frame F. below end time. [You may strain it to write.] This allows time information to be read from the beginning of the data acquisition memory 15.

It is also possible to search for.

Roughly, as shown in Figure 2(a), the frame (
For example, as the address data to be written to the data acquisition memory 15 in F, ), the adjacent frame F
address data A. -2 is stored in the data acquisition memory 15; The address may be used as address data. That is, for example, address A of the data acquisition memory 15 that stores the time information of frame Fn-1.
(+1> can also be used as address data in frame F0.

In addition, in this practical explanation, we have explained the case of searching acquired data in a protocol analyzer as an example, but we have also explained the case of searching acquired data in a protocol analyzer as an example. The present invention can also be applied to searching data collected in a computer. (This type of data acquisition device has multiple serial data
There are devices that can simultaneously acquire data from the fins, and the channel number is also set as additional information. The acquired data consists of frame data FD and frame data FD.
Data D other than data. is twice the number of acquisition lines, that is, the data on the sending and receiving sides. In addition, data and additional information are included. , FD, each serial data
Since the data is acquired completely randomly between channels rather than line by line, the desired data and additional information can be
, FD at time T. To specify and search, you must check large amounts of data. Therefore, if the present invention is applied to such a device, the data retrieval time can be significantly reduced.

Effects of the Invention As is clear from the above explanation, according to the present invention,
For each frame of input transmission data, in addition to the end time of that frame, the write address of the next frame to be searched is written to the data acquisition memory, so you can specify the acquisition time instead of the address. Even when extracting data, the end time of the next frame to be searched can be detected according to the address data written in that frame without searching for data unrelated to time information and additional information. It has become possible to retrieve the desired data and additional information in a short time. Therefore, the effects of the present invention are extremely large.

[Brief explanation of drawings]

Fig. 1 is a circuit diagram of an example of the present invention, and Fig. 2 is a circuit diagram of an example of the present invention.
Figure 3 is a data layout diagram for explaining the arrangement of data in the data acquisition memory shown in Figure 1; It is. 11... Serial/parallel conversion circuit 12... Analysis circuit 13... Time register 14... Address register 15... Data acquisition memory 16... Reproduction display control circuit 17... Display circuit 20... Serial data line 21... Parallel data bus 22... Parallel data and additional information bus.

Claims (1)

[Claims] Converting input serial data into parallel data (11), distinguishing the converted parallel data from frame data and data other than frame data, and converting the converted parallel data into frame data. and adding respective additional information to data other than the frame data (12), and adding additional information to the identified frame data and the frame data (12).
Data other than data and each of the additional information (D_n
, FD_n) is information to be stored in the memory means (15), the time at which the information to be stored is obtained is time information (T_n) to be stored in the memory means, and the frame data, additional information, and the time are Address data (A_n
), and the frame data and additional information and the frame
When storing data other than data, additional information, and the time information in the memory means, the address (A_n_-_1, A_n_+_1) in the memory means storing the predetermined data in an adjacent frame is
A search method for acquired data, comprising: storing the data together as adjacent address data; and searching the adjacent address data to obtain the time information.