JPS61114347A - Microprocessor processing memory method - 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 Application of the Invention] The present invention relates to the development of nine devices using a microprocessor,
This invention relates to a mnemonic method suitable for chronologically storing microprocessor processing during manufacturing, inspection, and maintenance.

[Background of the invention]

Microprocessors are widely used in various fields. Up until now, most devices using microprocessors have been small, so when developing devices, it was sufficient to measure the timing of electrical circuits or depack programs with a small number of steps.

However, the processing power of microprocessors has increased year by year,
With the advancement of peripheral devices, the development of powerful operating systems, and the development of high-level languages, even huge systems are often processed by a single microprocessor. However, as the product becomes larger, the hardware becomes more complex, and the number of programs and steps of the program increases.

If a device using such a microprocessor fails in its development, and if the device does not perform the processing that the designer intended and behaves abnormally, it is extremely difficult to discover the cause. In this case, tools for analyzing microprocessor processing are essential.

There are two main methods for analyzing microprocessor processing. One is to use a powerful operating system and analyze the processing of programs running under the operating system using the operating system's trace function. However, this method does not allow complete storage of processing, and since the operating system and hardware are not yet fully developed during product development, it is actually often used in the product's maintenance department Kit'.

Another method is to diagnose external development equipment. In this method, unlike the above-mentioned method, the degree of completion of a single product does not matter. In most of these methods, a certain trigger condition is set, the device under test is operated, and the processing of the microprocessor after the trigger condition is satisfied is stored in chronological order. As a form, the device to be measured is connected to the circumferential detection terminal (T) and measured. Electrical signals such as address and data outputted by the microprocessor from this detection terminal are inputted into the measuring instrument by IgL, and the trigger conditions are set. Establishment f: Monitor.

When the trigger condition is met, subsequent addresses, data, etc. are stored in the INK output by the microprocessor.

By measuring in this way, it is possible to analyze the entire process of the microprocessor when the trigger condition is met.

Conventional measuring instruments like this can set complex conditions, but fundamentally only one trigger condition can be set.In other words, the conditions until the trigger condition is met are complex, but in reality There is only one trigger condition. Measurements are difficult with such measuring instruments because they use one memory k to store two or more independent processes (one trigger condition).For example, when a microprocessor is -+B-+C→D When performing the process sf: of the person and D, even if you want to memorize the process, the trigger condition is satisfied in the process of M, and before the process of D is memorized,
The memory of the measuring instrument is used to store the processing of B and C, and the processing of D cannot be stored.

Since memory capacity is limited, the conventional method of using one trigger condition and memory as one,
It is difficult to remember two or more independent processes,
There are 6 problems that prevent you from using memory effectively.

[Purpose of the invention]

Is the purpose of the present invention a microprocessor? To provide a device capable of storing the processing of 2" or more independent microprocessors at once in a device for the purpose of analyzing microprocessor processing in the development of convenient equipment, etc. be.

[Summary of the invention]

A feature of the present invention is that two or more trigger conditions can be set;
In addition, the memory is divided equally by the number of trigger conditions, 11K each.
By storing the processing of the microprocessor after the trigger condition is satisfied, even if the memory capacity is small, it can be used effectively and the purpose is achieved by storing the necessary information.

[Embodiments of the invention]

Hereinafter, the present invention will be explained in detail with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment in which the present invention is applied to a processing storage device of a microprocessor.
The figure is a rounded 70-chart explaining its operation.

In FIG. 1, l is a keyboard for inputting trigger conditions, etc., 2 is a display for displaying memorized results, etc., and 3 is a keyboard for inputting trigger conditions, etc.;
The keyboard, display, memo 1 trigger, detection circuit,
A control device controlled by software; 4 a memory for storing processing data of a microprocessor in chronological order; -5 a trigger detection circuit for detecting the establishment of a trigger condition; 6 an IC in the storage device for detecting electrical signals of the object to be measured; In order to incorporate
It consists of an interface.

Next, the operation of each part in FIG. 1 will be explained based on chart 70 in FIG.

The measuring person connects the address bus, data bus, etc. of the microprocessor to be measured.

This connection allows the control device to monitor the processing of the microprocessor through the interface.

Next, the measurer uses the keyboard to call up the trigger condition setting screen. This screen is for setting trigger conditions. (Step 100) The control device reads the command from the keyboard and displays a trigger condition setting screen on the display.

(101) When the measurement is finished, the measurer issues a trigger condition setting end command from the keyboard.

(102) The control device receives the trigger condition setting end command from the keyboard, and counts the number of trigger conditions. (
103) Now, if this number is N, the control device divides the memory into N equal parts ([14] When the measurement preparation is completed, the measurer inputs a storage start command from the keyboard). (10
5) When the storage start command is input from the keyboard, the control device sets the first trigger condition in the trigger detection circuit. (106))! The gar detection circuit monitors the processing of the microprocessor through the interface. (107)) When the IJ condition is satisfied, the trigger detection circuit reports the establishment of the trigger condition to the control device. The control device receives a trigger condition satisfaction report from the trigger detection circuit and stores, through the interface, a memo IJK of the microprocessor's processing after the trigger condition has been met for each bus cycle. What is stored is signals such as addresses and data output by the microprocessor. Also, the order in which the data is stored is in the order in which the microprocessor outputs the data.

During this storage, 1 of the memory divided into N equal parts in step 104
The controller continues to remember until all of them are used. (1
09) When the storage is completed, the control device determines whether all trigger conditions are satisfied. (110) If all trigger conditions are not satisfied, the control device sets the next trigger condition in the trigger detection circuit. The trigger detection circuit again monitors the microprocessor's processing through the interface. After that, steps 106, 107, 109
．． Step 110 is repeated until all trigger conditions are met. If one memorization ends before all the trigger conditions are met, the measurer inputs a memorization end command (using the keyboard). When the control device receives the storage end command, it waits for the trigger condition to be met (step 107), and exits the microprocessor processing storage loop.

(108) As described above, when all the trigger conditions are met or when a storage termination command is input, the control device displays a message ft indicating the completion of processing and storage of the microprocessor on the display. (111) The measurer selects the processing storage screen from the keyboard. <112) The control device receives the processing storage screen selection command from the keyboard and displays the processing storage screen on the display.

(113) This screen displays the stored microprocessor processing for each trigger condition, and allows the measurer to view the measurement results.

ti The above example describes the case where the object to be measured is a single microprocessor.
Needless to say, the present invention can also be applied to devices connected to interfaces, etc.

FIG. 3 shows a device in which the assumed microgross set t was used as the object to be measured in the above-mentioned experiment. 7 is a microprocessor, and 8 is a main memory of the microprocessor. FIG. 4 shows a modification of the Ilo interface t-aX to the configuration of FIG. 3. 9 is a microprocessor, 10 is a main memory, and 11 is an I10 interface for the microprocessor to use I10 equipment. Even in the device with the configuration shown in Figure 4, there is only one path, so not only the microprocessor processing but also the
0 interface processing can also be analyzed.

〔Effect of the invention〕

As described above, by being able to set N trigger conditions, the processes of 92 or more microprocessors can be stored independently at one time.

In particular, when there is another process between the target processes in independent processes, it has become possible to do things that were impossible with conventional measuring instruments. In addition, by dividing the memory equally by the number of trigger conditions, the microprocessor processing for each trigger condition can be stored equally, and unnecessary data will not be stored, so memory can be used effectively. It has become possible. Furthermore, although this device can set a plurality of trigger conditions, it does not cause any unreasonable functionality even if there is only one trigger condition, so it also has the functions of conventional measuring instruments.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment in which the present invention is applied to a processing storage device of a microprocessor, FIG. 2 is a 70-chart for explaining its operation, and FIG. 3 is an example of an object to be measured. The figure shown in FIG. 4 is a diagram showing a modification of the object to be measured. l... Keyboard, 2... Display, 3... Control device, 4... Memory, 5... Trigger detection circuit, 6...
...Interface, 7...Microprocessor,
8... Main memory, 9... Microprocessor, lO
... main memory, enter fP filler Akio Takahashi

Claims (1)

[Claims] 1. Multiple trigger conditions can be set in a device that connects an external interface to capture the internal signals of the device under test and stores the processing of the microprocessor that is the device under test in chronological order. 1. A processing storage method for a microprocessor, characterized in that by equally dividing the memory in a storage device by the number of times, the processing of the microprocessor after each trigger condition is satisfied can be stored in each equally divided memory.