JPH08286948A - Device and method for supporting software development - Google Patents

Abstract

PURPOSE: To provide a device and method for supporting software development by which a non-general-purpose target software for processing data written in a ROM can be efficiently developed by a custom IC. CONSTITUTION: The address space of a memory for storing the software of a target 20 as development object equipment is directly mapped into the memory space of a main memory 16 at the software development supporter composed of a host computer. Thus, data prepared by the software development supporter can be immediately executed on the target and the software of the target can be developed in a cross environment.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a software development support device and method for supporting software development, and particularly to software cross-environment for embedded equipment etc. which is difficult to develop by itself. The present invention relates to a software development support device and method that can be developed in.

[0002]

2. Description of the Related Art Generally, as a method of developing software for a development target device (target) in which it is difficult to develop software by itself such as an embedded device, a method using ICE (In Circut Emulator) It has been known. However, this ICE can be applied to general-purpose products such as a CPU, a one-chip microcomputer, and a display.
It could not be used for the development of non-universal target software such as C processing data written in ROM.

Therefore, conventionally, in the case of developing non-general-purpose target software in which a custom IC processes data written in a ROM, the software has been developed in the following procedure. 1) Create target software with a computer. 2) Convert (compile) the created software into binary data. 3) Store the compiled data in a storage medium such as a floppy disk. 4) Write the data stored in the storage medium to the target ROM by the ROM writer. 5) Target ROM with data written (actual machine)
Attach to. 6) Turn on the power of the target (actual machine). 7) Evaluate the execution result of the target (actual machine). 8) If the target (actual device) does not operate as designed, remove the ROM in which the data written in the target (actual device) is written, and erase the data in this ROM.
The above processes 1) to 7) are repeated until the target (actual device) operates as designed.

[0004]

By the way, according to the above-mentioned conventional software development procedure, the target (actual machine)
Writing and erasing data to and from the ROM will be repeated until the device operates as designed. However, writing and erasing data to and from this ROM takes a lot of effort and time. However, there is a problem that it is not possible to efficiently develop software for a non-general target that processes data.

Therefore, in the present invention, the custom IC is RO
An object of the present invention is to provide a software development support device and method capable of efficiently developing non-general target software that processes data written in M.

[0006]

In order to achieve the above-mentioned object, the present invention provides at least a storage unit, a first processor capable of reading the contents of the storage unit, and reading the contents of the storage unit. In a software development support device for supporting the software development of a development target device having a second processor which cannot be performed by using software creation means of a host computer, an address space for storing data related to the software of the development target device. In the address space of the memory means, and writing means for writing data relating to software used in the development target device created by the software creating means in the address space of the memory means. Control the written software so that it can be read and written by the above development target device Characterized by comprising a control unit that, the.

Further, the present invention includes at least a storage section,
The software creation means of the host computer is used to develop the software of the development target device including the first processor capable of reading the contents of the storage unit and the second processor not capable of reading the contents of the storage unit. In the software development supporting apparatus for supporting by means of the above, there is provided a first memory means to which an address space for storing software of the development target device is allocated, and a memory space corresponding to the address space of the first memory means. Second memory means, writing means for writing the software of the development target device created by the software creating means into the second memory means by designating the address space, and the second memory means The software written in the above address space allows the device under development to operate as designed. If There characterized by comprising a correction means for correcting the software written in the second memory means.

Furthermore, the present invention is a software development supporting method for supporting software development of a development target device, wherein the development target is stored in a main memory connected to a host computer which supports the software development of the development target device. The address space for storing the software of the device is allocated, the memory having the memory space corresponding to the address space is connected to the development target device, and the software of the development target device created by the host computer is used in the address space. Is written to the memory, the software written in the memory controls the development target device, and if the development target device does not operate as designed due to the execution of the control, it is written in the memory. It is characterized by modifying the stored software.

Furthermore, the present invention is a software development supporting method for supporting software development of a development target device, wherein the development is performed in a main memory connected to a host computer which supports development of the development target device software. An address space for storing software of the target device is allocated, a memory having a memory space corresponding to the address space is detachably attached to the host computer, and the software of the development target device created by the host computer is By writing in the memory by designating an address space, and by mounting the memory in the development target device, the software written in the memory controls the development target device, and by executing the control, If the device under development does not work as designed, By mounting the memory to the host computer, characterized by modifying the software written to the memory.

[0010]

According to the present invention, the address space such as the ROM for storing the software of the development target device (target) is directly mapped to the memory space of the main memory of the software development support device connected to the host computer. By enabling the data created by the software development support device to be executed immediately on the target, it is possible to develop the target software in a cross environment, which greatly increases the efficiency of the target software development. Improve.

That is, in the software development support apparatus according to the present invention, the memory space of the software development support apparatus is assigned an address space for storing the software of the development target apparatus, and the development target apparatus created by the software creation section The writing means writes the software in the address space of the memory means, and the control means controls the software written in the address space of the memory means so that the development target device can read and write the software.

Here, the memory means has an expansion slot and is connected to the host computer through the expansion slot, and the address space is referred to by the host computer.

Further, the address space can be constituted by an address space corresponding to the memory space of the expansion memory connected to the expansion slot.

Here, the control means connects the expansion slot to the expansion memory via a first gate, and the expansion memory and the development target device to a second gate. Second connecting means for connecting via
And a selecting means for selectively operating one of the first gate and the second gate.

Here, the first gate and the second gate
The gate can be formed on an expansion board for mounting the expansion memory.

The second connection means may be configured to connect the development target device via a socket for connecting a memory storing the software to the development target device.

In the software development support apparatus of the present invention, the address space for storing the software of the development target device is assigned to the first memory means of the software development support apparatus, and the above-mentioned first memory means is used. A second memory means having a memory space corresponding to the address space is provided, and by designating the address space for the software of the development target device created by the software creating means, the writing means causes the second memory means. Write to
When the development target device does not operate as designed by the software written in the address space of the second memory means, the software written in the second memory means is corrected by the correction means.

Here, the software development support device is connected to a host computer, the first memory means comprises a main memory having an expansion slot connected to the host computer, and the second memory means. Can be configured to include an expansion memory detachably mounted in the expansion slot.

The expansion memory can be removably mounted in the expansion slot and can be removably mounted in a socket for connecting the memory storing the software to the development target device. Memory and
A backup power supply for backing up the volatile memory can be provided and configured.

Here, the volatile memory and the backup power supply may be formed on an expansion board for mounting the expansion memory.

Further, in the software development support method of the present invention, an address space for storing the software of the development target device is allocated to the main memory connected to the host computer which supports the software development of the development target device, and A memory having a memory space corresponding to the address space is connected to the development target device, and the software of the development target device created by the host computer is written in the memory by designating the address space,
The software written in the memory controls the development target device, and if the development target device does not operate as designed due to the execution of the control, the software written in the memory is modified.

Here, the memory may be an expansion memory connected to an expansion slot of the main memory.

The memory can be configured to be selectively read and written by either the host computer or the development target device.

In the software development support method of the present invention, the address space for storing the software of the development target device is allocated to the main memory connected to the host computer which supports the software development of the development target device, and A memory having a memory space corresponding to the address space is detachably attached to the host computer,
The software of the development target device created by the host computer is written in the memory by designating the address space, and the development target device is written by the software written in the memory by mounting the memory in the development target device. When the device under development does not operate as designed due to the execution of the control, the memory is reattached to the host computer to correct the software written in the memory.

Here, the memory may be an expansion memory connected to an expansion slot of the main memory.

[0026]

Embodiments of the software development support apparatus and method according to the present invention will be described below in detail with reference to the drawings.

FIG. 1 shows a schematic configuration of an embodiment of a software development support system configured by applying the software development support apparatus and method according to the present invention. In this embodiment, an extension board 30 connected to a host computer 10 which is a software development support device and a ROM socket 21a provided on a substrate of a target 20 which is a development target device are connected by a signal line 40, It is configured so that the software of the target 20 can be developed in a cross environment.

Here, the ROM socket 21a is a target R that stores the software of the target 20.
It is for connecting an OM (not shown).

In FIG. 1, the host computer 10
Is a CPU (Central Processing Unit) 11 via a bus, a display 12, a keyboard 13, a mouse 14, a ROM.
(Read Only Memory) 15 and RAM (Random Access Memory) 16 are connected, and the CPU 1
The control unit 1 has a function of creating and modifying the software of the target 20.

The display 12 is for displaying data to be processed by the host computer 10, the keyboard 13 and mouse 14 are for inputting various data and commands, and the ROM 11 is for C
The RAM 16 is a non-volatile memory that stores a control program of the PU 11, and the RAM 16 is a readable and writable volatile memory that stores a variety of data and constitutes a work area of the CPU 11.
0 constitutes the main memory.

Further, in this embodiment, in order to secure the additional memory of the RAM 16 of the host computer 10, the expansion board 30 can be detachably mounted.

As will be described later in detail, the expansion board 30 is equipped with an expansion memory composed of RAM. When the expansion board 30 is installed in the host computer 10, the expansion memory of the expansion board 30 is stored in the expansion memory. The address space is assigned (mapped) to the address space of the RAM 16 so that the CPU 11 can read and write data in the memory space of the extension memory of the extension board 30 like the RAM 16.

In this embodiment, the memory space of the additional memory of the expansion board 30 is used to support the software development of the target 20.

FIG. 2 is a schematic external view of the software development support system of this embodiment shown in FIG. In FIG. 2, the expansion board 30 can be removably attached to the host computer 10. Here, the expansion board 30 has a RAM 32 forming an additional memory of the RAM 16 of the host computer 10 and a connector 32a for connecting to the target 20.

Host computer 10 and target 20
A connector 32b is provided on the host computer 10 side for the signal line 40 for connecting the
A connector 21b is provided on the side, the connector (plug) 32b is connected to the connector (socket) 32a of the expansion board 30, and the connector (plug) 21b is
It is connected to a ROM socket 21a for connecting a target ROM (not shown) of the target 20.

Here, in the connector (plug) 21b,
As shown in FIG. 3, a connection pin 210b corresponding to a hole 210a of a ROM socket 21a for connecting a target ROM (not shown) is formed, and the connection pin 210b of this connector (plug) 21b is used as a ROM. By inserting into the hole 210a of the socket 21a, the signal line 4
0 is connected to the ROM socket 21a of the target 20.

FIG. 4 shows a detailed structure of the expansion board 30 shown in FIG. In FIG. 4, the expansion board 30 is configured to be detachably attached to the host computer 10 via an expansion slot 17 provided in the host computer 10.

Further, the extension board 30 is provided with a connector 32a for connecting a signal line 40 for connecting the host computer 10 and the target 20. As described above, the connector 32a includes the connector 32
The signal line 40 is connected via b, and the signal line 40 is
R of the target 20 through the connector (plug) 21b
It is connected to the OM socket 21a.

In the expansion board 30 shown in FIG. 4, when the expansion board 30 is installed in the host computer 10 shown in FIG.
Provides a memory space as an additional memory of the RAM 16 of the host computer 10.

The RAM 31 is connected to the expansion slot 17 of the host computer 10 via the first gate 34, and the RAM 31 is connected to the connector 32a via the second gate 35.

First gate 34 and second gate 35
Are controlled by the control unit 50. That is, the control unit 5
0 is composed of a resistor 53 for pulling up the control signal line 51 and a resistor 54 for pulling up the control signal line 52 and a switch 55 having one end grounded. When the switch 55 is switched as shown in the figure, control is performed. The signal line 51 goes low and the control signal line 52 goes high, opening the first gate 34 and closing the second gate 35. In this case, the RAM 31 of the expansion board 30 can be read and written from the host computer 10 side.

When the switch 55 is switched in the opposite direction to that shown in the figure, the control signal line 51 is at high level and the control signal line 52 is high.
Goes low, closing the first gate 34 and opening the second gate 35. In this case, the RAM of the expansion board 30
31 can be read and written from the target 20 side.

Although the control unit 50 is composed of the resistors 53 and 54 and the switch 55 in FIG. 4, it may be composed of a flip-flop 56 as shown in FIG.

The control unit 50-1 shown in FIG. 5 can be replaced with the control unit 50 shown in FIG.
According to the control unit 50-1 shown in FIG. 4, the first gate 34 and the second gate 3 shown in FIG.
5 can be controlled.

That is, in FIG. 5, when the data D0 is set to "1", the control signal line 51 becomes low level and the control signal line 52 becomes high level at the timing of the clock signal CS, which causes the first gate 34 to operate. Open, second
Gate 35 is closed.

When the data D0 is set to "0", the control signal line 51 becomes high level, the control signal line 52 becomes low level at the timing of the clock signal CS, the first gate 34 is closed, and the second gate 34 is closed. The gate 35 is opened.

FIG. 6 shows a concrete example of the structure of the target 20 shown in FIG. In FIG. 6, the target 20 includes a ROM 22, a custom IC 23, and a custom IC control circuit 24, and an address bus 25-A and a data bus 25 are provided between the custom IC 23 and the custom IC control circuit 24. -D, connected via control bus 25-C, custom IC
23 and the ROM 22 are connected via an address bus 26-A, a data bus 26-D, and a control bus 26-C.

Here, the ROM 22 is the target 2
Software for controlling 0 is stored, and the ROM 22 is mounted using the ROM socket 21a shown in FIG. In this embodiment, this R
Support the development of software stored in OM22.

In the configuration of FIG. 6, the target 20 includes the ROM 22, the custom IC 23, and the custom IC.
Although the configuration including the control circuit 24 is shown, the custom IC control circuit 24 may be removed from the configuration shown in FIG. 6 and the target 20 may be configured to include the ROM 22 and the custom IC 23.

By the way, in this embodiment, the memory space of the RAM 31 shown in FIG. 4, which is the additional memory of the expansion board 30, is used to support the software development of the target 20.

That is, instead of the ROM 22 mounted on the target 20 shown in FIG. 6, the RAM of the expansion board 30.
By using 31, the data created by the host computer 10 can be immediately executed on the target 20, and software development of the target 20 is performed in a cross environment.

By the way, when the expansion board 30 is attached to the host computer 10, the host computer 10 allocates (maps) the address space of the RAM 31 of the expansion board 30 to the address space of the RAM 16, and thereby the host computer 10 has the address space. CPU11
Can read and write data in the memory space of the RAM 31 of the expansion board 30 like the RAM 16.

Further, since the RAM 31 of the expansion board 30 is connected to the ROM socket 21a of the target 20 via the connector 32a, the target 20 has the ROM 22 shown in FIG. Data can be read and written in this way.

That is, the address space of the ROM 22 of the target 20 is the RAM 31 of the host computer 10.
Assigned (mapped) to the address space of
And the RAM3 of the expansion board 30.
It becomes possible to share the memory space between the host computer 10 and the target 20 via the server 1.

FIG. 7 is a diagram for explaining the memory space shared between the host computer 10 and the target 20. In FIG. 7, (a) shows a memory map of the RAM 31 of the host computer 10,
(B) shows the memory area of the ROM 22 of the target 20. As is apparent from FIG. 7, the memory area of the ROM 22 of the target 20 (addresses 00000 to 100
00) is the address space (address 0C8000 to 0D) of the memory map of the RAM 31 of the host computer 10.
8000), and in this state, if the data of the address space address 0C8000-0D8000 of the RAM 31 of the host computer 10 is rewritten,
It is equivalent to rewriting the contents of the ROM 22 of the target 20.

As is apparent from the configuration shown in FIG. 4, the RAM 31 of the expansion board 30 cannot always be read and written by the host computer 10 and the target 20. That is, the RAM 31 of the expansion board 30 is
It is selectively read and written by the host computer 10 and the target 20.

FIG. 8 is a flow chart showing a process when the host computer 10 writes data, that is, software of the target 20, into the RAM 31 of the expansion board 30.

When data is written to the RAM 31 of the expansion board 30 by the host computer 10, the switch 55 shown in FIG. 4 is switched as shown (or the data D0 shown in FIG. 5 is set to "1"). ), The first gate 34 is opened, the second gate 35 is closed, and the target 20 is stopped, that is, the target 2
No data can be read or written from 0 to the RAM 31 of the expansion board 30 (step 100). Then, the host computer 10 writes the data in the RAM 31 of the expansion board 30 via the first gate 34 (step 101). After that, the switch 55 shown in FIG. 4 is switched in the opposite manner (or the data D0 shown in FIG. 5 is set to “0”) to close the first gate 34,
The second gate 35 is opened to release the stop of the target 20 (step 102). Thereby, the target 20
Can read / write data from / to the RAM 31 of the expansion board 30, and the target 20 can be operated by the data of the RAM 31 of the expansion board 30 as if the ROM 22 shown in FIG.

FIG. 9 is a flowchart showing the software development procedure in the software development support system shown in FIG.

In FIG. 9, first, the host computer 10 creates software for the target 20 (step 200). The software of the target 20 is created by inputting necessary data and commands by operating the keyboard 13 and the mouse 14 while observing the display on the display 12 using a predetermined software creating program of the host computer 10. Done.

When the host computer 10 completes the creation of the software of the target 20, the created software is converted (compiled) into binary data (step 201). Then, the conversion result is stored in the shared memory, that is, the RAM 31 of the expansion board 30 (step 202). This makes target 2
0 can be operated by the data of the RAM 31 of the expansion board 30 as if the ROM 22 shown in FIG. 6 is mounted.

Next, the operation of the actual machine, that is, the target 20 is started (step 203). Here, the operation of the target 20 is started by, for example, the target 2
Start command stop (HALT) given to 0 (RU
It can be realized by means that can be easily controlled by software, such as N). Further, even if the hardware configuration cannot be controlled by software, it can be realized by resetting the target 20.

Next, the execution result of the target 20 is evaluated (step 204), and the target 20 is evaluated from the evaluation result.
Whether or not it operated as designed (step 205).

When the target 20 does not operate as designed (NO in step 205), the operation of the actual machine, that is, the target 20 is stopped (step 20).
6), returning to step 200, the host computer 10
Then, the software of the target 20 is modified (step 200).

The above process is repeated until it is determined in step 205 that the target 20 operates as designed. When it is determined that the target 20 operates as designed (YES in step 205), the target 20 The software development support process ends.

The software of the target 20 determined by the software development support processing of the target 20 is written in the ROM by a ROM writer or the like, and the ROM in which this software is written is the ROM 22 shown in FIG. It is attached to the target 20.

In the above embodiment, the host computer 10 and the target 20 are connected by the signal line 40 to support the software development of the target 20, but the host computer 10 and the target 20 are connected to each other. May be connected to the target 20 via the storage medium without being connected by the signal line 40.

Next, another embodiment of the software development support apparatus and method of the present invention thus constructed will be described.

In this embodiment, the expansion board 30-
1 is equipped with a backup power supply for backing up the RAM 31 which is the additional memory mounted on the expansion board 30-1, that is, the battery 36.
1 is removed from the host computer 10, RAM
The data stored in 31 is configured so as not to disappear, and the host computer 10 is connected via the expansion board 30-1.
By providing the software created in the step 20 to the target 20, the software development of the target 20 is supported.

FIG. 10 shows a state in which the expansion board 30-1 in this embodiment is attached to the host computer 10.

Expansion board 30-1 in this embodiment
Is equipped with a RAM 31, which is an additional memory, and a backup battery 36 for backing up the RAM 31. Here, this expansion board 30
-1 is configured to be detachable from the expansion slot of the host computer 10. This expansion board 30-1
The RAM 31 is similar to the RAM 31 shown in FIG. 2, and when the expansion board 30-1 is attached to the host computer 10 via the expansion slot, the RAM 31 is added to the RAM 16 of the host computer 10 shown in FIG. A memory space is provided as a memory.

That is, in the host computer 10,
When the expansion board 30-1 is attached, the address space of the RAM 31 of the expansion board 30-1 is assigned (mapped) to the address space of the RAM 16 shown in FIG. 1, and the CPU 11 shown in FIG. RAM1
Similar to the configuration 6, the configuration is such that data can be read and written in the memory space of the RAM 31 of the expansion board 30-1.

The extension board 30-1 is shown in FIG.
As shown in FIG. 3, a connection pin 211b for connecting to a ROM socket 21a for connecting a target ROM (not shown) of the target 20 is formed on the lower surface thereof.

That is, in this embodiment, first,
Target 2 created by the host computer 10 by mounting the expansion board 30-1 on the host computer 10
0 software, RAM31 of the expansion board 30-1
In the host computer 10 and then remove the expansion board 30-1 from the host computer 10.
By inserting the connection pin 211b formed on the lower surface of -1 into the hole 211a of the ROM socket 21a of the target 20, the software created by the host computer 10 is given to the target 20, and thereby the target 20 using the host computer 10 is provided. Is configured to support the development of the software.

FIG. 12 shows the expansion board 30 shown in FIG.
1 shows a detailed configuration of -1. In FIG.
The expansion board 30-1 includes a RAM 31 that constitutes an additional memory of the host computer 10, a battery 36 that is a backup power source for backing up the RAM 31, and a connector 37 that is connected to the ROM socket 21a of the target 20. It Here, the connector 37 includes the connection pin 211b shown in FIG.

The RAM 31 shown in FIG. 12 is constructed such that by mounting the expansion board 30-1 on the host computer 10, the RAM 31 can be removably mounted on the host computer 10 via an expansion slot (not shown). There is.

FIG. 13 is a flow chart showing the software development procedure in the software development support system of this embodiment shown in FIGS.

In FIG. 13, first, the host computer 10 creates software for the target 20 (step 300). The software of the target 20 is created by inputting necessary data and commands by operating the keyboard 13 and the mouse 14 while observing the display on the display 12 using a predetermined software creating program of the host computer 10. Done.

When the host computer 10 completes the creation of the software of the target 20, the created software is converted (compiled) into binary data (step 301). The conversion result is stored in the memory unit, that is, the RAM of the expansion board 30-1.
It is stored in 31 (step 302).

Next, this memory unit, that is, the expansion board 30-1 is removed from the host computer 10, and the actual machine, that is, the target 20 is mounted (step 303). Target 20 of this expansion board 30-1
The expansion board 30-1 can be mounted on the expansion board 30-1 as shown in FIG.
The connecting pin 211b formed on the lower surface of the target 20
It is performed by inserting it into the hole 211a of the ROM socket 21a.

Then, the power of the actual machine, that is, the target 20 is turned on (step 304). As a result, the operation of the target 20 is started.

Next, the execution result of the target 20 is evaluated (step 305), and the target 20 is evaluated from the evaluation result.
Is operated as designed (step 306).

If the target 20 does not operate as designed (NO in step 306), the expansion board 30-1 is removed from the actual machine, that is, the target 20 (step 307).

After that, it is mounted on the host computer 10 again, the process returns to step 300, and the host computer 10
Then, the software of the target 20 is modified (step 300).

The above process is repeated until it is determined in step 306 that the target 20 operates as designed, and when it is determined that the target 20 operates as designed (YES in step 306), the target 20 The software development support process ends.

The software of the target 20 determined by the software development support processing of the target 20 is written in the ROM by a ROM writer or the like, and the ROM in which this software is written is the target R
It is attached to the target 20 as an OM.

[0087]

As described above, according to the present invention,
By directly mapping the address space such as ROM storing the software of the development target device (target) to the memory space of the main memory of the software development support device connected to the host computer, Since the created data is configured so that it can be immediately executed on the target, it becomes possible to develop the target software in a cross environment, which can greatly improve the efficiency of the target software development. It has the effect of being able to.

[Brief description of drawings]

FIG. 1 is a block diagram showing a schematic configuration of an embodiment of a software development support system configured by applying a software development support apparatus and method according to the present invention.

FIG. 2 is a schematic external view of the software development support system of this embodiment shown in FIG.

FIG. 3 is a schematic diagram showing how the signal line shown in FIG. 2 and a target ROM socket are connected.

FIG. 4 is a circuit diagram showing a detailed configuration of the expansion board shown in FIG.

FIG. 5 is a circuit diagram showing another configuration example of the control unit shown in FIG.

6 is a block diagram showing a specific configuration example of the target shown in FIG.

FIG. 7 is a diagram for explaining a memory space shared between the host computer and the target shown in FIG.

FIG. 8 is a flowchart of a process for writing data in the RAM of the expansion board by the host computer shown in FIG.

9 is a flowchart of a software development procedure in the software development support system shown in FIG.

FIG. 10 shows a schematic configuration of another embodiment of a software development support system configured by applying the software development support apparatus and method according to the present invention, showing a state in which an expansion board is attached to a host computer. The schematic external view shown.

FIG. 11 shows a schematic configuration of another embodiment of the software development support system configured by applying the software development support apparatus and method according to the present invention, showing the connection between the expansion board and the target ROM socket. Schematic showing the situation.

12 is a block diagram showing a detailed configuration of the expansion board shown in FIG.

FIG. 13 is a flowchart showing the software development procedure in the software development support system of the embodiment shown in FIGS.

[Explanation of symbols]

 10 Host Computer 11 CPU (Central Processing Unit) 12 Display 13 Keyboard 14 Mouse 15 ROM (Read Only Memory) 16 RAM (Random Access Memory) 17 Expansion Slot 20 Target 21a ROM Socket 21b Connector (Plug) 22 ROM 23 Custom IC 24 Custom IC control circuit 25-A address bus 25-D data bus 25-C control bus 26-A address bus 26-D data bus 26-C control bus 30 expansion board 30-1 expansion board 31 RAM 32a connector (socket) 32b Connector (plug) 34 First gate 35 Second gate 36 Battery 37 Connector 40 Signal line 50 Control unit 50-1 Control unit 51 Control signal line 52 Control signal line 53 Anti 54 resistor 55 Switch 56 flip-flops 210a-hole 210b connecting pin 211a holes 211b connecting pin

Claims (15)

[Claims] 1. Development of software for a development target device including at least a storage unit, a first processor capable of reading the contents of the storage unit, and a second processor not capable of reading the contents of the storage unit In the software development support device for supporting the software using the software creation means of the host computer, the software is created by the memory means to which the address space for storing the data related to the software of the development target device is allocated, and the software creation means. Writing means for writing data related to software used in the development target device into the address space of the memory means, and software written in the address space of the memory means so that the development target device can read and write the software. And a control means for operating the software. Air development support system. 2. The memory means has an expansion slot, is connected to the host computer through the expansion slot, and the address space is referred to by the host computer. Software development support device. 3. The software development support apparatus according to claim 1, wherein the address space comprises an address space corresponding to a memory space of an expansion memory connected to the expansion slot. 4. The control means includes a first connecting means for connecting the expansion slot and the expansion memory via a first gate, and a second gate for connecting the expansion memory and the development target device. 2. A second connecting means for connecting via the connecting means, and a selecting means for selectively enabling one of the first gate and the second gate to operate. Software development support device. 5. The software development support device according to claim 4, wherein the first gate and the second gate are formed on an expansion board for mounting the expansion memory. 6. The device according to claim 4, wherein the second connection means connects the development target device via a socket for connecting a memory storing the software to the development target device. Software development support device. 7. Development of software for a development target device including at least a storage unit, a first processor capable of reading the contents of the storage unit, and a second processor not capable of reading the contents of the storage unit In a software development supporting apparatus for supporting the software using a software creating means of a host computer, a first memory means to which an address space for storing the software of the development target device is allocated, and a first memory means of the first memory means. A second memory means having a memory space corresponding to the address space, and a writing program for writing software of the development target device created by the software creating means in the second memory means by designating the address space. And the software written in the address space of the second memory means. If the development target device does not work as designed software development support apparatus characterized by comprising a correction means for correcting the software written in the second memory means. 8. The software development support device is connected to a host computer, the first memory means is a main memory having an expansion slot of the host computer, and the second memory means is the expansion memory. 8. The software development support device according to claim 7, comprising an expansion memory detachably mounted in the slot. 9. A volatile memory in which the expansion memory can be removably mounted in the expansion slot and can be removably mounted in a socket for connecting the memory storing the software to the development target device. 8. The software development support apparatus according to claim 7, further comprising: a backup power supply for backing up the volatile memory. 10. The software development support device according to claim 9, wherein the volatile memory and the backup power supply are formed on an expansion board for mounting the expansion memory. 11. A software development support method for supporting software development of a development target device, wherein the software of the development target device is stored in a main memory connected to a host computer which supports development of the software of the development target device. And assigning an address space for storing the above, connecting a memory having a memory space corresponding to the address space to the development target device, and designating the software of the development target device created by the host computer to the address space. To the above memory, and the software written in the memory controls the development target device. If the development target device does not operate as designed by the execution of the control, the software written in the memory Software development support characterized by modifying Method. 12. The software development support method according to claim 11, wherein the memory is an expansion memory connected to an expansion slot of the main memory. 13. The software development support method according to claim 11, wherein the memory is selectively read and written from either the host computer or the development target device. 14. A software development support method for supporting software development of a development target device, wherein the software of the development target device is stored in a main memory connected to a host computer which supports development of the software of the development target device. Is assigned to the host computer, a memory having a memory space corresponding to the address space is detachably attached to the host computer, and the software of the development target device created by the host computer specifies the address space. By writing to the above memory, by installing the above memory in the device to be developed,
When the development target device is controlled by the software written in the memory and the development target device does not operate as designed due to the execution of the control, the memory is mounted on the host computer, A method for supporting software development, characterized by modifying software written in. 15. The software development support method according to claim 14, wherein the memory is an expansion memory connected to an expansion slot of the main memory.