KR20060062939A - The software development and operation method for the embedded system and mobile terminal using the method - Google Patents

Abstract

The present invention relates to a software development and execution method of an embedded system, and a mobile terminal device using the same.

In the present invention, the program binary code modified at the software development stage is executed in the embedded system using a distributed network file system without writing the flash memory of the embedded system. That is, the modified program binary code is directly reflected on the distributed network file system of the host computer, and then the distributed program file is mounted on a subdirectory of the root file system of the embedded system connected to the host computer through a local network. Read the code and run it.

According to the present invention, since only the program binary code optimized at the software development completion stage of the embedded system can be written to the flash memory of the embedded system, the number of times of code writing to the flash memory can be reduced.

Mobile terminal device, embedded system, distributed network file

Description

SOFTWARE DEVELOPMENT AND OPERATION METHOD FOR THE EMBEDDED SYSTEM AND MOBILE TERMINAL USING THE METHOD}

1 is a network connection diagram of devices for software development of an embedded system according to an exemplary embodiment of the present invention.

FIG. 2 is a structural diagram of each device shown in FIG. 1.

3 is a diagram conceptually illustrating a structure of a mobile terminal device in which a mobile terminal image file is recorded in configuring a software development environment of an embedded mobile terminal device according to an exemplary embodiment of the present invention.

4 is a flowchart illustrating an image file recording process of a mobile terminal device according to an exemplary embodiment of the present invention.

5 is a flowchart illustrating a software development and execution process of a mobile terminal device according to an embodiment of the present invention.

The present invention relates to an embedded system, and more particularly, to a method for developing and executing software of an embedded system, and a mobile terminal device using the same.

Generally, an embedded system refers to an electronic control system in which hardware and software of a computer are combined to perform a predetermined predetermined function, and some machines may be included as necessary. In other words, various electronic devices, home appliances, and control devices used in our lives are not simply composed of circuits, but microcontrollers (or microprocessors) are built in, and programs are built to drive the microcontrollers to perform specific functions. Point to a system. Embedded systems that can be easily seen around are, for example, home appliances such as DVD players, set-top boxes, mobile terminal devices, MP3 players, camcorders, digital cameras, refrigerators and washing machines. In addition, elevators, aircraft, medical devices, automobiles, factory control, and communication equipment (exchangers, routers, etc.) are embedded systems.

Early embedded systems were very simple in configuration and most were equipped with software that allowed limited operation on a 4bit / 8bit controller. However, as 32-bit microprocessors and digital signal processors (DSPs) are commonly used these days, a wider range of applications and higher performance software have been developed.

As the application fields of these embedded systems have diversified, embedded software, which was previously simple, has been dealing with more and more complex and diverse functions, and embedded system manufacturers have developed the embedded software necessary to quickly develop embedded software and shorten the project period. We strongly want the environment.

Embedded systems usually have limited resources, so the embedded software development environment usually consists of hosts and targets, with only a minimal development tool on the target, and most tools on a resource-rich host. Embedded software development environments should allow for convenient and rapid development of programs to run on resource-constrained targets.

In general, software development of an embedded system writes program binary code generated using a cross tool chain to a flash memory of the embedded system, and then loads and executes the code into main memory.

However, in this case, if the program is frequently modified in the software development stage of the embedded system, there is a problem that the software development cycle is extended and the life of the flash memory is shortened. That is, each time a program is modified, a process of writing the modified information in the flash memory of the embedded system is performed, thereby reducing the life of the flash memory by frequent information writing.

Therefore, the technical problem to be achieved by the present invention is to build a software development environment of a more convenient and efficient embedded system.

In particular, the technical problem to be achieved by the present invention is to reduce the unnecessary information recording operation of the embedded system to the flash memory using the distributed network file system technology in developing the software of the embedded system.

According to an aspect of the present invention, there is provided a method for developing and executing software of an embedded system. The embedded system is connected to a host computer, a console device, and a developer device through a local network. A method of developing and executing a method comprising: a) receiving a boot loader file, a kernel file, and a root file system image file from the host computer and storing the same in a flash memory of the embedded system; b) automatically booting the kernel according to the execution of the boot loader file and the kernel file stored in the flash memory of the embedded system; c) mounting a root file system stored in the flash memory to a root of an embedded system according to the kernel autobooting; d) mounting a distributed network file system (hereinafter, referred to as a first distributed network file system) of the host computer in a subdirectory of the root file system at the request of the embedded system; e) a distributed network file system mounted on the embedded system (hereinafter referred to as a second distributed network file system) is compiled on the host computer in response to a binary code execution request transmitted from a host computer, and the first distributed network file Reading the binary code of a program stored in the system; And f) executing the program binary code by a second distributed network file system of the embedded system.

Here, step e) may include providing a predetermined program from the developer device to the host computer; Compiling the program by the host computer, and storing the program binary code generated according to the compilation in a first distributed network file system; The host computer instructing binary code execution to the embedded system; And reading, by the second distributed network file system of the embedded system, the binary code stored in the first distributed network file system of the host computer according to the command.

In addition, the mobile terminal device according to another aspect of the present invention, in the mobile terminal device connected to the host computer, the console device, and the developer device via a local network, a first interface for performing data transmission and reception with the host computer; A second interface for performing data transmission and reception with the console device; A flash memory in which a boot loader file, a kernel file, and a root file system image file provided from the host computer are stored; A main memory in which files stored in the flash memory are loaded and driven; When the automatic kernel booting is performed according to the boot loader file and the kernel file, a root file system stored in the flash memory is mounted at a root, and a distributed network file system is provided from the host computer to receive a subdirectory of the root file system. A distributed network file system mounted on the subdirectory in response to a binary code execution request transmitted from the host computer, the program being compiled and stored in the distributed network file system of the host computer; Read and execute the binary code.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. The following embodiment describes an embedded software development method according to the present invention by taking an embedded mobile terminal as an embedded system as an example, but the embedded system according to the present invention is not limited to the mobile terminal.

In the embodiment of the present invention, the program binary code modified in the software development step is executed in the mobile terminal apparatus using a distributed network file system without writing the flash memory of the mobile terminal apparatus. That is, the modified program binary code is directly reflected in the distributed network file system, and then the program binary code can be executed in the mobile terminal device connected to the local network and mounted with the distributed network file system. Accordingly, since only the program binary codes optimized at the software development completion stage of the mobile terminal device can be written to the flash memory of the mobile terminal device, the number of times of code writing to the flash memory can be reduced.

1 is a diagram illustrating a network configuration for software development of a mobile terminal device according to an embodiment of the present invention, and FIG. 2 is a structural diagram of each device.

As shown in FIG. 1, in order to develop software of an embedded mobile terminal device according to an embodiment of the present invention, the mobile terminal device 100, the host computer 200, the console device 300, and the mobile terminal software developer device ( 400 is connected to the local network. In detail, the mobile terminal device 100 and the host computer 200 are connected to a peer-to-peer through a joint test action group (JTAG) communication interface, and the mobile terminal device 100 is connected to the mobile terminal device 100. Console device 300 is connected to peer-to-peer via serial communication interface 130.

As shown in FIG. 2, the mobile terminal device 100, which is a target device, includes a central processing unit 110, a main memory 120, a flash memory 130, a serial communication interface 140, and a JTAG communication interface 150. ), A network communication interface 160, and an input / output device communication interface 170 for a user interface. The flash memory 130 includes an area for storing a boot loader image, a kernel image, and a root file system image.

Here, the central processing unit 110 communicates with the host computer 200, the console device 300, and the like through each interface, and the mobile terminal device 100 stores a program developed in the developer device 400 and stored in the host computer 200. ) And provide the result to the developer device 400 through the console device 300.

The mobile terminal device 100 according to the embodiment of the present invention may further include a plurality of means for data transmission and reception and data processing in addition to the components described above. Omit.

In addition, as shown in FIG. 2, the host computer 200 also has the same hardware environment as the target device, such that the central processing unit 210, the main memory 220, the flash memory 230, the hard disk 240, It consists of a parallel communication interface 250, a serial communication interface 260, a network communication interface 270, and an input / output device communication interface 280. The central processing unit 210 of the host computer 200 includes a cross toolchain compiler 211 which is a cross compilation environment for software development of a target device. The cross toolchain compiler 211 includes various utilities and libraries necessary to compile and build various sources to generate an executable binary. The mobile terminal device 100 is connected to the host computer 200 through the JTAG communication interface 150, and the JTAG communication port of the mobile terminal device and the parallel communication port of the host computer are connected to the JTAG communication interface.

In addition, the console device 300 also includes a central processing unit 310, a main memory 320, a flash memory 330, a hard disk 340, a serial communication interface 350, a network communication interface 360, and an input / output device communication interface. 370.

Next, a method of constructing a software development environment of an embedded mobile terminal device according to an embodiment of the present invention and developing and executing software will be described.

In order to configure a software development environment of an embedded mobile terminal device, first, hardware of the mobile terminal device 100, the host computer 200, and the console device 300 are configured as shown in FIG. 1, and the mobile terminal software developer The hardware of device 400 is configured as a dummy terminal or host computer level device.

Then, the JTAG communication port of the mobile terminal device 100 and the parallel communication port of the host computer are connected to the JTAG communication interface.

After the network connection is established between the devices as described above, an image file recording process from the host computer 200 to the mobile terminal device 100 is performed as follows.

FIG. 3 conceptually illustrates a structure of a mobile terminal device in which a mobile terminal image file is recorded in configuring a software development environment of an embedded mobile terminal device according to an embodiment of the present invention.

In order to configure an execution environment of the mobile terminal device, an area for storing a boot loader image, a kernel image, and a root file system image is configured in the flash memory 130 of the mobile terminal device 100. As illustrated in FIG. 3, a boot loader file, a kernel file, and a root file system file generated from the host computer 200 are stored in a corresponding area of the flash memory 130 of the mobile terminal device 100 in the form of an image.

4 is a flowchart illustrating an image file recording process of a mobile terminal device according to an exemplary embodiment of the present invention.

As shown in FIG. 4, the host computer 200 compiles the boot loader file through the cross toolchain compiler 201, and the compiled boot loader file through the JTAG communication interface 140. Transfer to (S100-S120). The transferred boot loader file is recorded in the form of an image in the boot loader image area of the flash memory 120 of the mobile terminal device 100. The boot loader image 131 stored in the flash memory 130 of the mobile terminal device 100 is a program including a communication interface initialization (serial communication, network communication) function and a boot loader prompt processing function.

After the boot loader file is recorded in the form of an image, the mobile terminal apparatus 100 is cut off and then supplied again (S130). The power supply interruption and resupply process may be performed by a developer or under the control of the host computer 200.

When power is supplied to the mobile terminal device 100, the boot loader image stored in the flash memory 130 is loaded into the main memory 120 and executed. The kernel file is generated by the cross toolchain compiler 211 of the host computer 200.

Thereafter, a boot loader command mode is selected from the console device 300 through a communication interface setting path with the console device 300 (S140). Accordingly, the boot loader command prompt is displayed on the screen of the console device 300 by the boot loader 131 running in the main memory 120 of the mobile terminal device 100 (S150), and generated from the console device 300. The boot loader command for transmitting the kernel image is transmitted to the mobile terminal device 100 through the communication interface (S160).

When a command for transmitting a kernel image is transmitted from the console device 300, the boot loader 131 of the mobile terminal device 100 requests the kernel image transmission to the host computer 200 through the local network communication interface 160. (S170). Accordingly, the host computer 200 transmits the kernel file of the mobile terminal device compiled by the cross toolchain compiler 211 to the mobile terminal device 100 through the local network 500 (S180). The mobile terminal device 100 receives the kernel file and stores the kernel file in the form of an image in the kernel image region 132 of the flash memory 130 (S190).

Next, the boot loader command mode is selected again for the console device 300 (S200), and the screen of the console device 300 is displayed by the boot loader 131 running in the main memory 110 of the mobile terminal device 100. As the boot loader command prompt is output on the boot loader command for transmitting the file system image input to the mobile terminal device 100 is transmitted (S210 to S220). The boot loader 131 of the mobile terminal device 100 requests the root file system image transmission to the host computer 200 through the local network communication interface 160 according to the transmitted boot loader command (S230). The host computer 200 uses a root file system file composed of various libraries and environment files generated by the cross toolchain compiler 211 (or an open journaling file system production program of the host computer 200). The root file system file may be generated) to the mobile terminal device 100 through the local network (S240). The transmitted root file system file is recorded in the form of an image in the root file system image area 133 of the flash memory 130 of the mobile terminal device 100 (S250).

As described above, when the boot loader file, the kernel file, and the root file system file compiled by the host computer 200 are recorded in the flash memory 130 of the mobile terminal device 100 in the form of an image, move as follows. Software development and execution of the terminal device 100 is performed.

5 is a flowchart illustrating a software development and execution process of a mobile terminal device according to an embodiment of the present invention.

As shown in FIG. 5, the mobile terminal device 100 and the console device 300 are connected through a serial communication interface (S300), the mobile terminal device 100 and the host computer 220, and a host computer ( 200 and the mobile terminal software developer apparatus 400 are connected to the local network (S310), and the kernel booting and file system mounting procedures of the mobile terminal apparatus 100 are performed.

To this end, the mobile terminal device 100 is powered off and then supplied again to operate the mobile terminal device 100 in the kernel automatic booting mode (S320 to S330). That is, the boot loader image stored in the flash memory 130 is executed while being loaded into the main memory 120, the boot loader initializes hardware of the mobile terminal device, and the kernel image 132 stored in the flash memory 130. Load into main memory 120, and then execute execution rights to the kernel. Subsequently, the bootp client procedure and the tftp client procedure are performed by communicating with the host computer 200 under the control of the kernel. Under the control of the kernel 132, the file system 133 stored in the flash memory 130 is mounted at the root (S340).

During the kernel autobooting of the mobile terminal device 100, the host computer 200 configures the file system table environment file so that the network file system is mounted in a subdirectory of the root file system 205 of the mobile terminal device 100. . Thereafter, the host computer 200 responds to the network file system mount request from the mobile terminal device 100, so that the local network 500 distributes the distributed network file system including files that are frequently changed in the software development stage of the mobile terminal. In step S350 to S360, the terminal is mounted in a subdirectory of the root file system 133 of the mobile terminal apparatus 100 through the S-D360.

Thereafter, the developer remotely accesses the host computer 200 through the mobile terminal software developer device 400, copies the file compiled in the host computer 200 to the network file system CNF1 area, and the file is transferred to the mobile terminal. It is reflected in the network file system CNF2 of the device 100.

More specifically, the mobile terminal software developer device 400 remotely accesses the host computer 200 through a local communication network interface, and provides the developed mobile terminal program to the host computer 200. According to the remote control of the mobile terminal software developer device 400, the host computer 200 compiles the mobile terminal program through the cross toolchain compiler 211, and stores the binary code file generated according to the network file system (CNF1) area. Copy to (S370).

Next, the mobile terminal software developer device 400 remotely accesses the console device 300 through the local communication network interface 160 and requests execution of the program binary code (S380). Accordingly, the console device 300 instructs the mobile terminal device 100 to execute the program binary code through the serial communication interface 350 (S390). According to a code execution instruction provided from the console device 300, the central processing unit 110 of the mobile terminal device 100 maintains the network file system CNF2 mounted in a subdirectory of the root file system of the flash memory 130. The network file system CNF2 reads and executes the binary code file stored in the network file system CNF1 of the host computer 200.

Thereafter, the central processing unit 110 of the mobile terminal device 100 transmits the execution result of the binary code file to the console device 300 (S400), and the transferred execution result is a network communication interface of the console device 300. The mobile terminal software developer 400 transmits the information to the mobile terminal software developer device 400 through 360. Therefore, the software developer may check how the newly developed software is performed in the mobile terminal device 100 through the execution result delivered through the console device 300 (S410).

According to the method as described above, the developer can check the result of running the easily developed software on the mobile terminal device 100. After the final development of the optimal software, the console device 300, etc. The corresponding software may be stored and used in the flash memory 130 of the mobile terminal device 100.

The method described above may be implemented in the form of a program stored in a computer-readable recording medium. The recording medium may include any kind of recording device that stores data that can be read by a computer. For example, a CD-ROM, a magnetic tape, a floppy disk, and the like may be used. Included is implemented in the form of).

Although the present invention has been described with reference to the most practical and preferred embodiments, the present invention is not limited to the above disclosed embodiments, but also includes various modifications and equivalents within the scope of the following claims.

According to the present invention as described above, by using the distributed network file system technology, the program binary code modified in the software development step is reflected in the distributed network file system without writing to the flash memory of the mobile terminal, that is, embedded system, Since the program binary code can be executed in the embedded system connected through the local network, only the program binary code file optimized in the embedded system software development completion stage can be written to the flash memory of the embedded system.

Accordingly, the number of times of writing to the flash memory of the embedded system every time software development can be reduced. In addition, the life of the flash memory can be further extended by reducing the number of unnecessary information writes to the flash memory.

Also, without changing the software of the mobile terminal device into the flash memory, it can be immediately reflected in the distributed network file system and executed in the embedded system.

The network also makes it easier to jointly develop software for embedded systems.

Claims (9)

In a method of developing and executing software of the embedded system, the embedded system, host computer, console device, and developer device are connected through a local network. a) receiving a boot loader file, a kernel file, and a root file system image file from the host computer and storing the boot loader file in a flash memory of the embedded system; b) automatically booting the kernel according to the execution of the boot loader file and the kernel file stored in the flash memory of the embedded system; c) mounting a root file system stored in the flash memory to a root of an embedded system according to the kernel autobooting; d) mounting a distributed network file system (hereinafter, referred to as a first distributed network file system) of the host computer in a subdirectory of the root file system at the request of the embedded system; e) a distributed network file system mounted on the embedded system (hereinafter referred to as a second distributed network file system) is compiled on the host computer in response to a binary code execution request transmitted from a host computer, and the first distributed network file Reading the binary code of a program stored in the system; And f) executing the program binary code by a second distributed network file system of the embedded system Software development and execution method of the embedded system comprising a. The method of claim 1 Step a) Receiving, by the embedded system, a boot loader file from a host computer and writing the image to a flash memory in the form of an image; Powering off and resupplying the embedded system to execute a boot loader image recorded in the flash memory; Requesting a kernel image transfer to the host computer when the kernel image transfer request is input from the console device; Writing a kernel file provided from the host computer in the form of an image to the flash memory according to the request; When the root file system image transfer request is input from the console device, requesting the embedded system to transfer the root file system image to the host computer; And Writing a root file system file provided from the host computer in the form of an image to the flash memory according to the request; Software development and execution method of the embedded system comprising a. The method of claim 1 Configuring hardware of the embedded system into a main memory, a flash memory, a serial communication interface, a joint test action group (JTAG) communication interface, a network communication interface, and an input / output device communication interface; Configuring hardware of the host computer into a main memory, a flash memory, a hard disk, a network communication interface, a serial communication interface, a parallel communication interface, and an input / output device communication interface; And Configuring hardware of the console device into a main memory, a flash memory, a hard disk, a network communication interface, a serial communication interface, and an input / output device communication interface. Embedded software development and execution method further comprising. The method of claim 1 And transmitting, by the second distributed network file system of the embedded system, a program binary code execution result to a developer device through the console device. The method of claim 4 And storing the final program determined by the developer confirming the execution result of the program binary code in the flash memory of the embedded system through the console device. The method according to any one of claims 1 to 4. Step e) Providing a program from the developer device to the host computer; Compiling the program by the host computer, and storing the program binary code generated according to the compilation in a first distributed network file system; The host computer instructing binary code execution to the embedded system; And Reading, by the second distributed network file system of the embedded system, the binary code stored in the first distributed network file system of the host computer according to the command; Software development and execution method of the embedded system comprising a. In a mobile terminal device to which a host computer, a console device, and a developer device are connected through a local network, A first interface for performing data transmission and reception with the host computer; With the console device A second interface for performing data transmission / reception; A flash memory in which a boot loader file, a kernel file, and a root file system image file provided from the host computer are stored; A main memory in which files stored in the flash memory are loaded and driven; When the automatic kernel booting is performed according to the boot loader file and the kernel file, a root file system stored in the flash memory is mounted at a root, and a distributed network file system is provided from the host computer to receive a subdirectory of the root file system. Central processing unit Including, A mobile terminal device configured to read and execute binary code of a program compiled and stored in a distributed network file system of the host computer according to a binary code execution request transmitted from the host computer. . The method of claim 7, And the central processing unit provides the binary code execution result of the program to the console device through the second interface. The method according to claim 7 or 8 The first communication interface is a JTAG communication interface, the second communication interface is a serial interface, and the mobile terminal device is peer-to-peer with the host computer and console device through first and second communication interfaces. A mobile terminal device connected to a to-peer).

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