JPH09265411A - Development supporting device for microcomputer application system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To analyze the cause of a runaway from information corresponding to address bus signals by stopping the storage to a storage part of the address bus signals from a device to be developed based on runaway signals and securing the power supply of the storage part. SOLUTION: A runaway detector 4 inputs the address bus signals from the device to be developed and successively sends out the information corresponding to the address bus signals to a development supporting device main body. In the case that the device to be developed runs away, the runaway signals are inputted through a terminal 7. Further, in the case that the stopping function side of a start/stop switch 11 is operated, the stop signals are inputted and the storage into a memory 8 of the address bus signals from the device to be developed is stopped based on the runaway signals and the stop signals. Thus, since all the information corresponding to the address bus signals is stored in the memory 8 of the runaway detector 4, also sent to the development supporting device main body and stored, the cause of the runaway is analyzed in the development supporting device main body and the runaway detector 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a development support device for a microcomputer application system.

[0002]

2. Description of the Related Art FIG. 3 is a block diagram showing a conventional development support device for a microcomputer application system.
In the figure, reference numeral 1 is a developed device which is a microcomputer application system, and 2 is an operation of the developed device 1 on a bus 3.
It is a main body of a development support device such as a personal computer that is emulated via.

Next, the operation will be described. FIG. 3 emulates the operation of the developed device 1 by using the development support device main body 2 during the development of the microcomputer application system. The function of the development support device main body 2 is as follows.
Running program counter, registers, status flags,
Although it retains various information such as the contents of the memory and the reference of the real-time trace, the developed device 1 may be affected by a defect of the software of the developed device 1 and the influence of noise during execution of the developed device 1. There may be a case where an abnormality occurs in the instruction code executed by, and the development support apparatus main body 2 becomes inoperable. In order to cancel the inoperability of the development support device body 2, the development support device body 2 must be reset.

[0004]

Since the conventional development support device for the microcomputer application system is configured as described above, when the developed device 1 goes out of control while the operation of the developed device 1 is emulated. However, the development support apparatus main body 2 must be reset, the information that has been emulated until then disappears, and there is a problem that the cause of the runaway of the developed apparatus 1 cannot be analyzed.

The present invention has been made to solve the above problems, and even if the developed device runs out of control, it is possible to analyze the cause of the runaway of the developed device from the information according to the address bus signal. The purpose is to obtain a development support device for a computer application system.

[0006]

According to a first aspect of the present invention, there is provided a development supporting device for a microcomputer application system, which stores an address bus signal from a device under development in a storage unit and also stores the address bus signal in the storage unit. A central processing unit that sends information corresponding to the address bus signal to the development support device main body, and stops storing the address bus signal from the developed device in the storage unit based on the runaway signal from the developed device. The runaway detection device having a power supply unit for supplying a predetermined electric power to the central processing unit and the storage unit is also provided.

A development support apparatus for a microcomputer application system according to a second aspect of the present invention stores an address bus signal from a device under development in a storage unit and responds to the address bus signal stored in the storage unit. A central processing unit that sends information to the main body of the development support device and stops storing the address bus signal from the developed device in the storage unit based on a stop signal from the stop switch, and the central processing unit and the storage unit And a runaway detection device having a power supply unit for supplying a predetermined electric power.

According to a third aspect of the present invention, there is provided a microcomputer application system development supporting apparatus including a display section for displaying information according to an address bus signal stored in a storage section.
A runaway detecting device having a control switch for scrolling information according to an address bus signal displayed on the display unit is provided.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below. Embodiment 1. 1 is a block configuration diagram showing a development support device for a microcomputer application system according to Embodiment 1 of the present invention. In FIG. 1, 1 is a developed device which is a microcomputer application system, and 2 is a developed device 1. This is a main body of a development support device such as a personal computer that operates by inputting information according to an address bus signal via a communication cable 3c such as RS232C. Also,
Numeral 4 inputs an address bus signal from the developed device 1 and sequentially sends information corresponding to the address bus signal to the development support device main body 2, and based on the runaway signal from the developed device 1, the developed This is a runaway detection device that stops the input of an address bus signal from the device 1. 3a is an address bus and 3b is a runaway signal line.

FIG. 2 is a block diagram showing the details of the runaway detecting device. In FIG. 2, reference numeral 5 is a central processing unit such as a DMA controller and a DRAM controller. The address bus signal from is input via the terminal 6, and the memory (storage unit) 8
The information corresponding to the address bus signal is sent to the development support apparatus main body 2 via the communication driver 9, and the information corresponding to the address bus signal is output to the display unit 10. Further, when the developed device 1 runs out of control, a runaway signal from the developed device 1 is input through the terminal 7, and a start / stop switch (stop switch)
When the stop function side of 11 is operated, the stop signal is input, and the storage of the address bus signal from the developed device 1 in the memory 8 is stopped based on the runaway signal and the stop signal. Reference numeral 12 is a reset switch for resetting the runaway detection device 4, 13 is a control switch for scrolling information according to an address bus signal displayed on the display unit 10, and 14 is a power supply unit dedicated to the runaway detection device 4. The power supply unit 14 is independent of the other developed device 1 and the development support device main body 2.

Next, the operation will be described. In FIG. 2, operating the start / stop switch 11 causes the runaway detection device 4 to start operating. In the normal operation of the developed device 1, the address bus signal from the developed device 1 is input to the central processing unit 5 via the terminal 6 and stored in the memory 8 every time the address bus signal changes. Also, the memory 8
The information corresponding to the address bus signal stored in is transmitted to the development support apparatus main body 2 via the communication driver 9. Further, information corresponding to the address bus signal is converted into displayable signal data and displayed on the display unit 10. The development support apparatus main body 2 to which the information corresponding to the address bus signal is input is stored in the memory provided in the development support apparatus main body 2.

Here, when an abnormality occurs in the instruction code executed by the developed device 1 due to the influence of software defects and noise during execution of the developed device 1,
The runaway signal indicating the abnormality is sent to the runaway signal line 3b and the terminal 7.
To the central processing unit 5 via. The central processing unit 5 to which this runaway signal is input stops storing the address bus signal from the developed device 1 in the memory 8.

Further, when an abnormality occurs in the developed device 1 but the abnormality detection in the developed device 1 is delayed or does not function, the operator judges from the contents displayed on the display unit 10 that the developed device is By recognizing the runaway of No. 1 and operating the stop function side of the start / stop switch 11, the central processing unit 5 having received the stop signal stops storing the address bus signal from the device under development 1 in the memory 8. .

As described above, according to the first embodiment, even if the developed device 1 runs out of control, a runaway signal is output from the developed device 1 or the control switch 1 of the runaway detection device 4 is output.
By operating 3, all the information corresponding to the address bus signal is stored in the memory 8 of the runaway detection device 4, and all the information corresponding to the address bus signal from the runaway detection device 4 is stored in the development support device main body 2. Since it is sent and stored, there is an effect that the cause of the runaway of the developed device 1 can be analyzed in the development support device main body 2 and the runaway detection device 4.

Further, since the power supply unit 14 is provided exclusively for the runaway detection device 4, the development support device main body 2 becomes inoperable due to the runaway of the developed device 1, and the development support device main body 2 must be reset. Even if the state is not obtained, the reset operation of the development support device body 2 is not affected, the information based on the address bus signal stored in the memory 8 of the runaway detection device 4 is not lost, and the device under development 1 There is an effect that the cause of runaway can be analyzed.

[0016]

As described above, according to the first aspect of the invention, the central processing for stopping the storage of the address bus signal from the developed device in the storage unit based on the runaway signal from the developed device. Unit and its central processing unit are provided with a runaway detection device having a power supply unit for supplying a predetermined electric power, so that all information corresponding to the address bus signal is stored in the storage unit of the runaway detection device and the main body of the development support device. Is stored,
Even if the developed device runs out of control, it is possible to analyze the cause of the runaway of the developed device in the runaway detection device and the development support device main body. In addition, even if the development support device body becomes inoperable due to the runaway of the development target device and the development support device body is forced to be reset, it is not affected by the reset operation of the development support device body. The cause of the runaway of the developed device can be analyzed without losing the information based on the address bus signal stored in the storage unit of the runaway detecting device.

According to the second aspect of the present invention, the central processing unit for stopping the storage of the address bus signal from the device under development in the storage unit based on the stop signal from the stop switch, and the predetermined central processing unit. Since it is configured to have a runaway detection device having a power supply unit that supplies the power of the above, all the information corresponding to the address bus signal is stored in the storage unit of the runaway detection device and the main body of the development support device, and the developed device runs out of control. Even in this case, it is possible to analyze the cause of the runaway of the developed device in the runaway detection device and the development support device main body. In addition, even if the development support device body becomes inoperable due to the runaway of the development target device and the development support device body is forced to be reset, it is not affected by the reset operation of the development support device body. The cause of the runaway of the developed device can be analyzed without losing the information based on the address bus signal stored in the storage unit of the runaway detecting device.

According to the third aspect of the present invention, the display unit for displaying the information corresponding to the address bus signal stored in the storage unit, and the control for scrolling the information according to the address bus signal displayed on the display unit Since it is configured to have a runaway detection device with a switch, even if the developed device runs out of control, operating the control switch of the runaway detection device scrolls the information according to the address bus signal displayed on the display unit. Therefore, it is possible to analyze the cause of the runaway of the developed device from the history of the address bus signals displayed on the display unit.

[Brief description of drawings]

FIG. 1 is a block configuration diagram showing a development support device for a microcomputer application system according to a first embodiment of the present invention.

FIG. 2 is a block configuration diagram showing details of a runaway detection device.

FIG. 3 is a block configuration diagram showing a conventional development support device for a microcomputer application system.

[Explanation of symbols]

1 development target device, 2 development support device main body, 4 runaway detection device, 5 central processing unit, 8 memory (storage unit), 10
Display, 11 start / stop switch (stop switch),
13 control switches, 14 power supply.

Claims (3)

[Claims] 1. An address bus signal from a device to be developed is stored in a storage unit, and information corresponding to the address bus signal stored in the storage unit is sent to a development support device main body.
And a central processing unit for stopping the storage of the address bus signal from the developed device in the storage unit based on the runaway signal from the developed device, and a power supply for supplying predetermined power to the central processing unit and the storage unit Support device for a microcomputer application system equipped with a runaway detection device having a section. 2. An address bus signal from a device to be developed is stored in a storage unit, and information corresponding to the address bus signal stored in the storage unit is sent to the main body of the development support device.
A central processing unit that stops storing the address bus signal from the developed device in the storage unit based on the stop signal from the stop switch, and a power supply unit that supplies predetermined power to the central processing unit and the storage unit. A device for supporting development of a microcomputer application system equipped with a runaway detecting device. 3. A runaway detecting device having a display unit for displaying information according to an address bus signal stored in a storage unit and a control switch for scrolling information according to the address bus signal displayed on the display unit. The development support apparatus for a microcomputer application system according to claim 1 or 2, characterized in that.