JPS60195662A - System developing device - Google Patents

Abstract

PURPOSE:To effectively utilize system developing devices for microprocessor, by constituting a multiple system developing system with the system developing devices by synchronizing them to each other by supplying the output signal for synchronism of one system developing device to the input terminal for synchronism of the other devices. CONSTITUTION:Trigger output terminals OUT of two already developed emulator system EMS-A and EMS-B are respectively connected with break input terminals, namely, input terminals IN for synchronism of the emulator systems EMS-A and EMS-B through external probes Pi against two microprocessors A and B used for a microcomputer system to be developed. Therefore, when it is checked that which processor accesses a register provided in a common address space, one device EMS-B (or EMS-A) can be broken by synchronizing the device EMS-B (or EMS-A) to the other device EMS-A (or EMS-B) by using a signal indicating that the breaking condition is effected in the other device EMS-A (or EMS-B).

Description

Detailed Description of the Invention [Technical Field] The present invention relates to a system development device, such as an ICE (in-circuit emulator) or an ASE
The present invention relates to a technology effective for use in a system development device for a microcomputer including a multi-configuration microprocessor such as an adaptive system evaluator (Adaptive System Evaluator).

[Background technology]

Systems using microcomputers are usually small-scale and equipped with only the necessary functions. On the other hand, since the information processing becomes complicated,
Synchroscopes and logic analyzers alone are insufficient for debugging such systems, and cannot deal with runaway programs or system abnormalities that are poorly reproducible.

For debugging such systems, it is necessary to display the flow of the program, and to obtain and obtain bus information and external signals over multiple cycles just before the user system stopped.
A device with functions such as display is required. An ICE or ASE device is used for debugging such a system.

By the way, by combining multiple microprocessors into one
A multi-configuration microcomputer that configures one microcomputer system has been developed. As a development device for such a microcomputer system, for example, the "μPDSD" sold by Jyuken Potential
7800 series" is publicly known. This “μPDSD7
For the 800 series J, there are multiple in-circuit processors compatible with the microprocessor for system development.
- Not only is an emulation bus etc. required for synchronizing the emulator board and these multiple in-circuit emulator boards, but also, for example, 16
The problem with mixing 8-bit and 8-pin microprocessors is that special development software is required.

[Purpose of the invention]

An object of the present invention is to provide a system development device for a multi-configuration microcomputer system in which a system development device for each microprocessor can be effectively utilized.

The above and other objects and novel features of this invention include:
It will become clear from the description of this specification and the accompanying drawings.

[Summary of the invention]

A brief overview of typical inventions disclosed in this application is as follows.

In other words, synchronization is performed by supplying the synchronization output signals of each system development device prepared for a multi-configuration microprocessor for system development to the synchronization input terminal of other system development devices. It constitutes the system development device of the configuration.

〔Example〕

FIG. 1 shows a system development apparatus A according to an embodiment of the present invention.
A schematic external view of the SE is shown.

The box box contains a microprocessor constituting the ASE, and is connected to a microprocessor MPU socket of a user system to perform system debugging via a flat cable with an MPU (microprocessor) connector. The other flat cable is connected to the system development apparatus EMS. Further, the box BOX is provided with a plurality of probes Pi to Pn, allowing connection to any measurement location.

Although there are no particular restrictions, when the microcomputer that constitutes the user system is actually operated,
A one-chip microprocessor fMPU (microprocessor unit) desired by the user is mounted in the microprocessor MPU socket.

With such a connection, the microprocessor in the box box operates according to the development program stored in the floppy disk included in the system development device EMS, and necessary data input, program creation, modification, etc. are performed by the system. This is done using a keyboard (not shown) etc. connected to the development device EMS, and the necessary data is
The information is displayed on a display device (not shown) or the like coupled to the system development device.

In addition, the system development device EMS is equipped with a trigger output terminal, which outputs a negative pulse each time the breakpoint conditions set by the break (B R) command are met, although there is no particular restriction. . Usually, a pulse from this trigger output terminal is used as a synchronization signal for a synchroscope or the like.

In this embodiment, the pulse from the trigger output terminal (output signal for synchronization) is also used to synchronize multiple system development devices to realize system development of a multi-configuration microcomputer system. be. In other words, as shown in the block diagram shown in FIG. 2, two emulator systems EMS-A and EMS-B have already been developed for two microprocessors A and B used in the microcomputer system to be developed.
The trigger output terminal OUT and break input terminal (synchronization input terminal) IN are connected to each other by an external probe pt. As described above, since the pulse output from the trigger output terminal has a small pulse width, it cannot be taken in as a break signal as it is, so the pulse width is expanded by the pulse width expansion circuit and output. Such a pulse width expansion circuit is provided in a system development device on the output side or the input side.

As a result, for example, when checking which microprocessor is accessing a register etc. provided in a common address space, the system development device EMS-A (or EMS-B) can check the break conditions. is synchronized with the trigger output signal indicating that the system development device EMS-B (or EMS
- A) can be broken. Since the above break settings can be set arbitrarily, both system development equipment FffiEMs-A can be
and EMS-B can be synchronized.

In addition, each of the above system development devices EMS-A and EMS-
In B, CRT is a display device, KB is a keyboard, and the box BOX is omitted.

Furthermore, the number of system development devices mentioned above is increased according to the number and types of microprocessors that constitute the microcomputer system to be developed, and the trigger output signal is used to break the necessary system development devices according to the system configuration. It is intended to be supplied as an input signal.

〔effect〕

(11 By using the trigger output signal of the system development device for each microprocessor as a break signal for other system development devices, it is possible to synchronize any number of system development devices, so multi-configuration The effect is that system development in the microcomputer system becomes possible.

(2) According to +1) above, a system development device that has already been developed can be used as is, so that the effect that the system development device can be used effectively can be obtained.

(3) When developing a system development device for a specific microprocessor, by providing an output terminal for a break signal to other system development devices in addition to a trigger output terminal, the system development device can be used as a multi-configuration microcomputer. This has the advantage that it can be used for system development.

(4) Since it is sufficient to simply connect a plurality of system development apparatuses using an external probe or the like, an effect can be obtained in that the conventional synchronization interface and control signal bus are not required.

Although the invention made by the present inventor has been specifically explained above based on Examples, it goes without saying that this invention is not limited to the above Examples and can be modified in various ways without departing from the gist thereof. For example, if one break condition only needs to break the other,
It is sufficient to extend the pulse width of one trigger output signal (unnecessary if the pulse width has been extended in advance) and supply it as a break signal to the other trigger output signal.

[Application field]

The present invention can be widely used as a system development device for multi-configuration microcomputer systems.

[Brief explanation of the drawing]

FIG. 1 is a schematic external view of a system development apparatus according to an embodiment of the invention, and FIG. 2 is a block diagram showing an embodiment of a multi-configuration system development apparatus according to the invention. BOX... Box, EMS, EMS-A, EMS-B
...System development bag fi, M, U...Microprocessor unit, P1-Pn...External probe, CRT...
Display device, KB...Keyboard

Claims (1)

[Claims] 1. A synchronization output signal in each system development device prepared for a multi-configuration microprocessor for which system development is to be performed is supplied to a synchronization input terminal of another system development device. , a system development device comprising one system development device. 2. The system development device according to claim 1, wherein the synchronization output signal is mutually supplied to synchronization input terminals among a plurality of system development devices. 3. The synchronization output signal is supplied to the synchronization input terminal through a pulse width expansion circuit that makes the pulse width larger than one cycle of the synchronization input signal capture clock. Range 1st or 2nd
System development equipment as described in section.