Abstract:
A method and apparatus to upgrade software of an apparatus having a plurality of microprocessors. The method includes: each of the plurality of microprocessors transmitting their identification information and information regarding current software externally to an upgrade device which is connected to the target apparatus via a common external interface; receiving identification information of the microprocessor to be upgraded from the upgrade device; preparing the microprocessor to be upgraded for communication with the upgrade device while setting the rest of the microprocessors into a standby mode; and upgrading software of the microprocessor to be upgraded by communicating with the upgrade device.

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS  
       [0001]     This application claims the priority of Korean Patent Application No. 2004-94270, filed on Nov. 17, 2004, in the Korean Intellectual Property Office, the disclosure of which is incorporated herein in its entirety by reference.  
       BACKGROUND OF THE INVENTION  
       [0002]     1. Field of the Invention  
         [0003]     The present general inventive concept relates to upgrading of software, and more particularly, to a method and apparatus to upgrade software of an apparatus having a plurality of microprocessors.  
         [0004]     2. Description of the Related Art  
         [0005]     Various hardware and software components are installed in a single electronic device so that the electronic device can perform a range of functions. Additionally, plural microprocessors are required to be mounted in a single electronic device since there is a limit to the number of operations that can be performed with a single microprocessor.  
         [0006]     When upgraded software is developed, the software for a microprocessor included in an electronic device must also be upgraded. To accommodate the upgrading software, an external interface port of the electronic device is connected to a computer in which an application for upgrading software is mounted. The microprocessor is initialized after current flows thereto, and the upgraded software is transmitted to the microprocessor through communication between the computer and the microprocessor.  
         [0007]     Conventionally, when an electronic device has a plurality of microprocessors, software must be upgraded separately for each of the microprocessors by providing a separate external interface for each of the microprocessors.  
         [0008]      FIG. 1  is a block diagram illustrating a conventional method of upgrading software for an electronic device  200  including a plurality of microprocessors. Referring to  FIG. 1 , the electronic device  200  includes first, second, . . . , N th  microprocessors  240 ,  250 , . . . ,  260 , and first, second, . . . , N th  external interfaces  210 ,  220 , . . . ,  230 . A personal computer (PC)  10 , in which an application for software upgrading is mounted, upgrades software of the first microprocessor  240  via the first external interface  210 , upgrades software of the second microprocessor  250  via the second external interface  220 , . . . , upgrades software of the N th  microprocessor  260  via the N th  external interface  230 .  
         [0009]     According to the conventional method described above, the number of external interfaces required for upgrading microprocessors increases proportionally as the number of microprocessors mounted in an electronic device increases. As a result, the cost and size of the electronic device increases as the number of microprocessors within the electronic device increases. In addition, when upgrading all of the plurality of microprocessors within the electronic device, a large amount of time is consumed since a connecting device connected to a computer and used for upgrading the software of each of the microprocessors needs to be sequentially connected to each of the external interfaces of the microprocessors. Furthermore, errors and other problems can occur, such as connecting the computer to a wrong external interface in the attempt to update the software for a microprocessor, if plural microprocessors of the same type are included in an electronic device.  
       SUMMARY OF THE INVENTION  
       [0010]     The present general inventive concept provides an apparatus having a plurality of microprocessors with a simple hardware structure that can quickly upgrade the software of each of the plurality of microprocessors and reduce errors that frequently occur during the upgrading.  
         [0011]     The present general inventive concept also provides a method of upgrading software that can be used to quickly upgrade the software of a plurality of microprocessors included in an apparatus, while reducing the occurrence of errors that can take place during the upgrading.  
         [0012]     Additional aspects and advantages of the present general inventive concept will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the general inventive concept.  
         [0013]     The foregoing and/or other aspects of the present general inventive concept are achieved by providing an apparatus that upgrades software by communicating with an upgrade device, including: an external interface which communicates with the upgrade device; and a plurality of microprocessors, each storing identification information and information regarding current software. Each of the microprocessors can transmit the identification information and the information regarding the current software to the upgrade device via the external interface. The microprocessor among the plurality of microprocessors that has identification information corresponding to identification information received from the upgrade device is determined to be the microprocessor to be upgraded, and prepares to communicate with the upgrade device through the external interface while the rest of the microprocessors are set in a standby mode, and then the microprocessor to be upgraded upgrades its software by communicating with the upgrade device.  
         [0014]     The foregoing and/or other aspects of the present general inventive concept are also achieved by providing a method of upgrading software for a plurality of microprocessors associated with an electronic device, the method including: transmitting from each of the plurality of microprocessors identification information and information regarding current software thereof to an upgrade device which is connected externally to the electronic device; receiving at the electronic device identification information of a microprocessor to be upgraded from the upgrade device; preparing the microprocessor to be upgraded for communication with the upgrade device while setting the rest of the microprocessors in a standby mode; and upgrading software of the microprocessor to be upgraded by providing communication between the microprocessor to be upgraded and the upgrade device. 
     
    
     BRIEF DESCRIPTION OF THE DRAWINGS  
       [0015]     These and/or other aspects and advantages of the present general inventive concept will become apparent and more readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:  
         [0016]      FIG. 1  is a block diagram illustrating a conventional method of upgrading software of a microprocessor;  
         [0017]      FIG. 2  is a block diagram of an apparatus having a plurality of microprocessors according to an embodiment of the present general inventive concept;  
         [0018]      FIG. 3  is a block diagram of a host microprocessor and slave microprocessors according to an embodiment of the present general inventive concept;  
         [0019]      FIG. 4  is a flow chart illustrating a method of upgrading software of a plurality of microprocessors according to an embodiment of the present general inventive concept; and  
         [0020]      FIG. 5  is a flow chart illustrating a process of upgrading software of a microprocessor to be upgraded included in the method illustrated in  FIG. 4 . 
     
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS  
       [0021]     Reference will now be made in detail to the embodiments of the present general inventive concept, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the like elements throughout. The embodiments are described below in order to explain the present general inventive concept by referring to the figures.  
         [0022]      FIG. 2  is a block diagram of an apparatus  300  having a plurality of microprocessors according to an embodiment of the present general inventive concept. Referring to  FIG. 2 , the apparatus  300  includes an external interface  310 , and first, second, . . . , N th  microprocessors  330 ,  350 , . . . ,  370 .  
         [0023]     The apparatus  300  requires only one external interface  310  to connect an upgrade device with each of the first, second, . . . , N th  microprocessors  330 ,  350 , . . . ,  370 . The upgrade device is a separate device having an application to upgrade software of microprocessors and includes software to be used to upgrade each of the plurality of microprocessors. The upgrade device can be a computer, such as a desktop computer or a notebook computer. Unique identification information is allocated to the first, second, . . . , N th  microprocessors  330 ,  350 , . . . ,  370 , and is stored in an internal memory (not shown). Using the application to upgrade software, the upgrade device can select one of the plurality of microprocessors. The selected microprocessor then prepares to communicate with the upgrade device via the external interface while the rest of the microprocessors are set in standby mode. In an alternative embodiment of the present inventive concept, one of the first, second, . . . , N th  microprocessors  330 ,  350 , . . . ,  370  selected by the upgrade device can be designated as a host microprocessor while the rest of the microprocessors are designated as slave microprocessors via intercommunication with the upgrade device. For example,  FIG. 3  illustrates where the second microprocessor  350 , selected by a personal computer (PC)  20  which is acting as the upgrade device, is a host microprocessor while the first, . . . , N th  microprocessors  330 , . . . ,  370  are slave microprocessors.  
         [0024]     A method of upgrading software of the first, second, . . . , N th  microprocessors  330 ,  350 , . . . ,  370  will be described in more detail based on the structure of the apparatus  300  including the first, second, . . . , N th  microprocessors  330 ,  350 , . . . ,  370 .  
         [0025]      FIG. 4  is a flow chart illustrating a method of upgrading the software of the first, second, . . . , N th  microprocessors  330 ,  350 , . . . ,  370  according to an embodiment of the present general inventive concept. Referring to  FIG. 4 , first the PC  20  is connected to the external interface  310  of the apparatus  300 , which is a target apparatus, including a plurality of microprocessors whose software is to be upgraded, using a predetermined connecting device operation S 410 .  
         [0026]     Next, each of the first, second, . . . , N th  microprocessors  330 ,  350 , . . . ,  370  transmits its identification information and information regarding its current software to the PC  20  through the external interface  310  operation S 420 . The transmission of the identification information through the external interface  310  to the PC  20  can be performed sequentially according to a predetermined order with respect to the microprocessors  330 ,  350 , . . . ,  370 . For example, the first, second, . . . , N th  microprocessors  330 ,  350 , . . . ,  370  can sequentially transmit their identification information and information regarding their current software to the PC  20  through the external interface  310 .  
         [0027]     A manager, located at the PC end, which upgrades the software of the apparatus  300  using the PC  20 , can be used to select one of the first, second, . . . , N th  microprocessors  330 ,  350 , . . . ,  370  as the object to be upgraded operation S 430 . The identification information of the selected microprocessor is then transmitted to the first, second, . . . , N th  microprocessors  330 ,  350 , . . . ,  370  via the external interface  310  operation S 440  from the PC  20 . The particular microprocessor of the first, second, and N th  microprocessors  330 ,  350 , and  370  that has the identification information (i.e., the microprocessor selected by the manager) is then designated a host microprocessor, which prepares to communicate with the PC  20  (upgrade device) operation S 450 . The rest of the microprocessors are then designated as slave microprocessors according to a control of the host microprocessor, and are thus set in a standby mode (operation S 460 ).  
         [0028]     The microprocessor temporarily selected as the host microprocessor then upgrades the software therein by communicating with the PC  20  (operation S 470 ). When the identification information of another microprocessor is newly input from the PC  20  (operation S 480 ) after the software of the previously selected host microprocessor is upgraded, operations S 430  through S 470  are repeated to upgrade software of the microprocessor having the newly input identification information. Accordingly, in this embodiment, one of the microprocessors at a time which is chosen to be upgraded is selected as the host microprocessor, while the other microprocessors are set into a slave mode, and then the same operations are repeated when another microprocessor is chosen to be upgraded.  
         [0029]      FIG. 5  is a flow chart illustrating operation S 470  of  FIG. 4  in more detail. An example in which the second microprocessor  350  is the host microprocessor, and the first, . . . , N th  microprocessors  330 , . . . ,  370  are slave microprocessors, as illustrated in  FIG. 3 , will be described.  
         [0030]     The second microprocessor  350 , which, in the embodiment of  FIG. 3  is illustrated as the host microprocessor, receives information regarding the latest software by request from the PC  20  (operation S 471 ). The information regarding the latest software includes identification information of software and/or information regarding a software version.  
         [0031]     The second microprocessor  350  compares the received information regarding the latest software with information regarding its current software stored in an internal memory (not shown), and determines whether the software needs to be updated (operation S 473 ). Information regarding the latest software version and information regarding the current software can be compared to determine whether the software needs to be updated, but the method illustrated in  FIG. 5  is not limited thereto.  
         [0032]     If the software needs to be updated, the second microprocessor  350  requests a download of the latest software from the PC  20 , and downloads the latest software (operation S 475 ). The second microprocessor  350  determines whether upgrading of the software is completed (operation S 477 ). If the upgrading process is not completed successfully, the second microprocessor  350  again requests a download of the latest software from the PC  20 , and repeats downloading the latest software.  
         [0033]     According to various embodiments of the present general inventive concept described above, the hardware structure of an electronic device having a plurality of microprocessors can be simplified and manufacturing costs can be reduced since only a single external interface is required to be mounted in the electronic device to upgrade software for each of plural microprocessors. Furthermore, an upgrading process of the hardware of the electronic device is simplified, thereby reducing the time consumed for upgrading the software, and reducing errors that are caused during the upgrading process.  
         [0034]     For example, using unique identification information for each of the plurality of microprocessors reduces the error of selecting the wrong microprocessor to be upgraded regardless of whether the electronic device has more than one microprocessor of the same type.  
         [0035]     Additionally, reducing the number of external interfaces through which a plurality of microprocessors can communicate with an upgrade device simplifies the hardware structure of the upgrade device, thereby reducing errors in connecting the upgrade device with the incorrect external interface and accordingly with an incorrect microprocessor.  
         [0036]     The general inventive concept can also be embodied as computer readable codes on a computer readable recording medium. The computer readable recording medium can be any data storage device that can store data which can be thereafter read by a computer system. Examples of the computer readable recording medium include read-only memory (ROM), random-access memory (RAM), CD-ROMs, magnetic tapes, floppy disks, optical data storage devices, and carrier waves (such as data transmission through the Internet). The computer readable recording medium can also be distributed over network coupled computer systems so that the computer readable code is stored and executed in a distributed fashion.  
         [0037]     Although a few embodiments of the present general inventive concept have been shown and described, it will be appreciated by those skilled in the art that changes may be made in these embodiments without departing from the principles and spirit of the general inventive concept, the scope of which is defined in the appended claims and their equivalents.