JP4149426B2 - Door phone system - Google Patents

Description

  The present invention relates to a door phone system, and in particular, includes a nonvolatile memory that stores a program for operating the door phone system, and can update information stored in the nonvolatile memory using a memory card. The door phone system is related.

  The door phone system generally includes a parent device installed indoors and a child device installed outdoors.

  In recent years, with the improvement of security awareness, a solid-state image sensor is used in the slave unit, and a call is made to notify a guest in the room, and the video shot in the slave unit is displayed on the monitor in the indoor unit. TV door phone systems with cameras are widespread. According to such a door phone system, a user in a room can check who the visitor is before opening the door.

  In addition, the multi-function and / or high functionality of the TV door phone system with camera is also progressing, so that when a visitor is present during absence, the video of the visitor is automatically recorded in the built-in or external memory unit. Thus, a technology has been adopted in which a visitor can be confirmed after returning home, or a visitor can be confirmed on the go by automatically transmitting the video to a mobile phone or the like.

  As for video recording in the door phone system, still images have been recorded in the past, but with the increase in capacity and price of non-volatile readable / writable memories, recording of moving images or semi-moving images is becoming possible. is there.

  Furthermore, a system capable of increasing the memory capacity by installing a general-purpose memory card slot to increase the number of records and the recording time has been announced.

  Note that the system configuration and processing contents are becoming more complex as the functionality of such a camera-equipped TV door phone system increases. As a result, the microcomputer that executes the control of the door phone system conventionally has only to execute the control to the extent that it can respond to the call from the slave unit and the camera image of the slave unit is displayed on the monitor of the door phone master unit. However, in recent systems, the processing content is sophisticated, such as compressing the video signal and drawing complex characters and figures on the monitor. A high-performance microcomputer is used. Along with these trends, the program capacity of microcomputers that perform system control tends to increase, and program errors (bugs) are likely to be mixed.

  If a bug in the program is discovered after the product is shipped, the program must be updated by collecting the product, etc., but depending on the system configuration, it may be necessary to replace the board. May occur.

  Therefore, in recent door phone systems, there is an increasing number of cases where a program for controlling a complicated system control microcomputer is stored in a readable / writable nonvolatile memory such as a flash memory. When the control program is stored in a readable / writable non-volatile memory in this way, the system in which the non-volatile memory is mounted has the non-volatile memory IC (integrated circuit) readable / writable on the substrate. If it is compatible with “on-board writing” in which the above update is performed, the above-described correction program can be corrected at a relatively low cost.

  Various methods have been proposed in the past for correcting the stored contents of the nonvolatile memory.

  For example, Patent Document 1 proposes a method for updating flash memory by transferring update data using a general-purpose interface such as RS232C when updating data in a flash memory of an electronic device.

  Patent Document 2 proposes a technique for updating flash memory by recording flash memory update data on a floppy (registered trademark) disk in an electronic balance device having a floppy (registered trademark) disk device.

Further, Patent Document 3 proposes a method of updating a rewritable semiconductor memory that stores data for control and the like using data in the memory card in an image pickup device having a memory card.
Japanese Patent Laid-Open No. 2000-122848 JP-A-5-126620 JP 2000-13669 A

  However, the techniques proposed in Patent Document 1 and Patent Document 2 have a problem that the data transfer time becomes long depending on the specifications of the interface used for the update data transfer and the interface device. This problem is particularly prominent in recent years because the program and data capacity of the updating system control microcomputer tend to increase.

  Further, in the technique proposed in Patent Document 3, it is considered that there is no problem regarding the data transfer speed, but it is necessary for a person to operate the operation switch when the semiconductor memory is updated. For this reason, for example, when it becomes necessary to update the stored contents of a memory in a large number of devices, it takes time and effort, and an operation error may occur.

  The present invention has been conceived in view of such circumstances, and an object thereof is a door phone system capable of updating the storage contents of a nonvolatile memory storing a control program and data efficiently and safely. Is to provide.

Doorphone system according to an aspect of the present invention, the intercom system comprising a base unit which is installed in a room, and the installed apart to the base unit and communicatively configured handset and the base unit A control unit that controls the operation of the door phone system, a program that the control unit executes to control the operation of the door phone system, and data for executing the program. 2 storage devices, a housing that houses the control unit, and a recording medium processing device that reads and writes information to and from a recording medium configured to be detachable from the housing, The first storage device is configured by a nonvolatile memory capable of reading and writing information by the control unit, and the second storage device is configured by the control unit. Only broadcast read is constituted by the non-volatile memory, wherein the setting of the method of updating the first storage device stores a file name of the predetermined file containing the files describing, wherein, the first Based on the program stored in the second storage device, the information recorded in the recording medium is read out through the recording medium processing device, and the file name stored in the second storage device and the recording medium When it is determined that the predetermined file exists on the recording medium by referring to the file name of the recorded file , the setting contents for the update method are described according to the setting contents described in the predetermined file. without storing the file in the first storage device, at least a program and data stored in the first storage device And updates the person.

In the door phone system according to the present invention, it is preferable that the predetermined file further includes a file in which update data corresponding to at least one of the program and data stored in the first storage device is described.

  In the intercom system according to the present invention, it is preferable that the file in which the update data is described is divided and recorded on the recording medium as a different file with a predetermined capacity.

  In the intercom system according to the present invention, the file in which the update data is described preferably includes checksum information for each fixed amount of data in the file.

  In the door phone system according to the present invention, management information of at least one of a program and data stored in the first storage device is stored in a predetermined storage location in the first storage device. It is preferable.

  In the door phone system according to the present invention, the management information is information representing at least one version of a program and data stored in the first storage device, and the predetermined file includes the predetermined information Information indicating the version of the file is described, and the control unit compares the information indicating the version of at least one of the program and data stored in the first storage device with the information indicating the version of the predetermined file. However, it is preferable to update at least one of the program and data stored in the first storage device only when the latter is information representing a new version.

  In the door phone system according to the present invention, the predetermined file includes date information that is information indicating an update date of the first storage device, and the control unit includes the first file. When at least one of the program and data stored in the storage device is updated, the date information is preferably stored in the first storage device.

  In the door phone system according to the present invention, it is preferable that the date information is recorded as one file in which only the date information is described on the recording medium.

  In the door phone system according to the present invention, the control unit may include the information that instructs the creation of the information related to the update history of the first storage device in the predetermined file. When at least one of the program and data stored in one storage device is updated, it is preferable that information related to the update history of the first storage device is recorded on the recording medium.

  The door phone system according to the present invention further includes an external connection unit that enables transmission and reception of information to and from an external device, and the control unit receives from the external device via the external connection unit. It is preferable that data is further utilized to update at least one of the program and data stored in the first storage device.

Intercom system in accordance with another aspect of the present invention comprises a base unit which is installed in a room, and the installed apart to the base unit and communicatively configured handset and the base unit A door phone system, comprising: a control unit that controls the operation of the door phone system; a program that the control unit executes to control the operation of the door phone system; and a data that executes the program And a second storage device, a housing that houses the control unit, and a recording medium processing device that reads and writes information from and on a recording medium that is configured to be detachable from the housing. The first storage device is configured by a non-volatile memory capable of reading and writing information by the control unit, and the second storage device is configured by the control unit. A non-volatile memory that can only read information, stores a file name of a predetermined file that is a file related to the update of the first storage device, and the control unit is stored in the second storage device Based on the program, the information recorded on the recording medium is read out via the recording medium processing device, and the file name stored in the second storage device and the file name of the file recorded on the recording medium When it is determined that the predetermined file exists in the recording medium by referring to the above, the predetermined file is used to update at least one of the program and data stored in the first storage device, An external connection unit that enables transmission / reception of information to / from an external device is further provided, and the control unit receives from the external device via the external connection unit. Data further using the updates at least one of the programs and data stored in the first storage device, the second storage device, for the first storage device, recorded on the recording medium The storage area that is allowed to be updated when the predetermined file is updated is updated when the data received from an external device is updated using the external connection unit. This is characterized in that at least a part of the storage area is stored as being different.

  According to the present invention, the storage content of a readable / writable nonvolatile memory storing a program for controlling the system and fixed data for executing the program is stored in a housing in which a control unit such as a memory card is accommodated. On the condition that a file with a predetermined file name is stored on a recording medium configured to be detachable from the body, it is automatically updated without any special operation by the user. Therefore, the storage contents of the nonvolatile memory can be updated safely without any operation error and without any problem with respect to the data transfer speed, that is, efficiently in a short time.

  As an embodiment of the present invention, in a camera-equipped TV door phone system having a memory card slot, a program executed by a system control microcomputer (microcomputer) and a flash memory storing data used for executing the program are stored. A control method in updating stored information will be described.

[First Embodiment]
FIG. 1 is a control block diagram of a camera door intercom system according to the first embodiment of the present invention. Referring to FIG. 1, the camera-equipped TV door phone system of the present embodiment is mainly composed of a camera-equipped door phone slave unit 1 installed outdoors and a door phone master unit 7 with monitor installed indoors (indoors). Composed.

  The camera-equipped doorphone slave unit 1 has a built-in camera unit 2 that captures an image of a visitor and converts it into a video signal. In addition, the camera-equipped doorphone slave unit 1 includes a speaker unit 3 that reproduces sound from the indoor doorphone unit with monitor, a microphone unit 4 that converts a visitor's voice into an electric signal, and an indoor unit that is operated to operate the indoor unit. A call SW (switch) unit 5 that generates a signal (call signal) for calling the monitor doorphone master unit 7 is provided. Furthermore, the door phone 1 with a camera includes a demultiplexing circuit unit 6. The demultiplexing / demultiplexing circuit unit 6 multiplexes the video signal from the camera unit 2, the audio signal from the microphone unit 4, and the calling signal from the calling SW unit 5, and transmits the multiplexed signal to the indoor doorphone with monitor 7. At the same time, the audio signal, the control signal, and the power for operating the camera-equipped doorphone slave unit 1 that are multiplexed and transmitted from the monitor-equipped doorphone master unit 7 are separated. Send to part 3.

  The monitor-attached intercom base unit 7 includes a demultiplexing / separating circuit unit 8. The multiplexing / separating circuit unit 8 separates the video signal, the audio signal, and the calling signal that are multiplexed and transmitted from the camera-equipped doorphone slave unit 1, and also receives the audio signal, The control signal and the power for operating the camera-equipped doorphone slave unit 1 are multiplexed and transmitted to the camera-equipped doorphone slave unit 1.

  Also, the monitor-equipped doorphone master unit 7 reproduces the audio signal transmitted from the camera-equipped doorphone slave unit 1 separated by the demultiplexing / demultiplexing circuit unit 8 and transmits the call signal from the camera-equipped doorphone slave unit 1. Is provided with a speaker unit 9 that emits a ringing tone based on the above.

  Also, the monitor-equipped doorphone master unit 7 includes the microphone unit 10 that converts sound to be transmitted to the camera-equipped doorphone slave unit 1 into an electrical signal, and the camera-equipped doorphone slave unit 1 separated by the multiplexing / separating circuit unit 8. The video decoder unit 11 that decodes the analog video signal of the video signal and converts it into a digital video signal, the compression of the video signal digitized by the video decoder unit 11, and the compressed digital signal input from the system control microcomputer unit 16 From the video signal compression / expansion unit 12 for expanding the video signal, the operation SW (switch) unit 13 for performing a response to the call from the camera intercom 1 and various operations, and the video signal compression / expansion unit 12 The LCD controller generates a drive signal by converting the video signal so that it can be displayed on an LCD (Liquid Crystal Display) monitor unit 15. Information for the memory controller 21, the LCD monitor unit 15 that performs display based on the video signal created by the troller unit 14, the LCD controller unit 14, the system control microcomputer unit 16 that controls the entire system of the monitor intercom base unit 7, and the memory card 21. The memory card controller unit 17 for writing and reading, the memory card slot unit 18 for inserting the memory card 21, and the system control microcomputer unit 16 mainly store programs and data for causing the doorphone with monitor 7 to perform normal operations. And a ROM (Read Only Memory) unit 20 in which a program for updating the flash memory unit 19 is mainly stored by the flash memory unit 19 and the system control microcomputer unit 16 when the monitor doorphone base unit 7 is started. It has. The flash memory unit 19 is composed of a nonvolatile memory that can be read and written by the system control microcomputer unit 16. The ROM unit 20 is composed of a non-volatile memory that can only be read from the system control microcomputer unit 16. The memory card 21 stores the video signal compressed by the video signal compression / decompression unit 12, update data of the flash memory unit 19, and the like, and is configured to be detachable from the monitor intercom base unit 7. .

  The door phone base unit 7 with the monitor is covered with a casing. The memory card 21 handled in the monitor doorphone master unit 7 is configured to be detachable from the housing.

  Next, normal operation of the camera door intercom system of the present embodiment will be described.

  When there is a visitor and the call SW unit 5 of the camera-equipped doorphone slave unit 1 is operated (for example, pressed), the call SW unit 5 generates a call signal. Then, the calling signal is multiplexed by the demultiplexing / demultiplexing circuit unit 6 and transmitted to the demultiplexing / demultiplexing circuit unit 8 of the monitor-equipped doorphone master unit 7. The call signal input to the demultiplexing / demultiplexing circuit unit 8 is separated by the demultiplexing / demultiplexing circuit unit 8 and input to the system control microcomputer unit 16.

  The system control microcomputer unit 16 determines that there is a visitor based on the input of the calling signal, and notifies the indoor person that there was a visitor by generating a calling sound in the speaker unit 9. Then, the camera unit 2 is activated by transmitting a control signal to the camera-equipped doorphone slave unit 1 via the demultiplexing / demultiplexing circuit unit 8.

  The video signal from the activated camera unit 2 is input to the demultiplexing / separating circuit unit 8 of the monitor intercom base unit 7 via the demultiplexing / separating circuit unit 6. The demultiplexing / separating circuit unit 8 separates the input video signal and inputs it to the video decoder unit 11. The input video signal is decoded by the video decoder 11 and converted into a digital video signal (luminance signal, color difference signal). The converted digital video signal is input to the video signal compression / decompression unit 12. In this case, the digital video signal input to the video signal compression / expansion unit 12 is input to the LCD controller unit 14 without being subjected to compression and expansion processing. The digital video signal input to the LCD controller unit 14 is converted into a format that can be displayed on the LCD monitor unit 15 and input to the LCD monitor unit 15 together with the drive signal. When the drive signal and the video signal are input to the LCD monitor unit 15, the video of the visitor imaged by the camera unit 2 of the camera-equipped doorphone slave unit 1 is displayed on the LCD monitor unit 15.

  Here, when an indoor person is at home and responds to a visitor's call by operating the operation SW unit 13, the system control microcomputer unit 16 performs demultiplexing according to the operation on the operation SW unit 13. A control signal is transmitted to the camera-equipped doorphone slave unit 1 via the circuit unit 8 to activate the microphone unit 4 and the speaker unit 3 of the camera-equipped doorphone slave unit 1.

  In this state, an indoor person can talk on the monitor-equipped doorphone master unit 7 while confirming an image of an outdoor visitor.

  When the call with the visitor ends, the system control microcomputer unit 16 sets the speaker unit 9, the microphone unit 10, the video decoder unit 11, the video signal compression / decompression unit 12, the LCD controller unit 14, and the LCD monitor unit 15, respectively. In addition to the standby state, a control signal is transmitted to the camera-equipped doorphone slave unit 1 through the demultiplexing / demultiplexing circuit unit 8, and the camera unit 2, the speaker unit 3, and the microphone unit 4 are set to the standby state, Prepare for visitors.

  When there is no indoor person and the absence setting has been performed by the operation SW unit 13 of the monitor-equipped doorphone master unit 7, the system control microcomputer unit 16 determines that the call SW unit 5 of the camera-equipped doorphone slave unit 1 In response to the operation, the digital signal input to the video signal compression / decompression unit 12 is instructed to be compressed.

  The video signal compressed by the video signal compression / decompression unit 12 is input to the memory card controller unit 17 via the system control microcomputer unit 16. The compressed video signal input to the memory card controller unit 17 is recorded for a predetermined time on the memory card 21 inserted in the memory card slot unit 18. When the recording for a predetermined time is completed, the system control microcomputer unit 16 puts the video decoder unit 11, the video signal compression / decompression unit 12, the LCD controller unit 14, the LCD monitor unit 15, and the memory card controller unit 17 in a standby state. At the same time, a control signal is transmitted to the camera-equipped doorphone slave unit 1 via the demultiplexing / separating circuit unit 8 to place the camera unit 2 in a standby state to prepare for the next visitor.

  The video recorded on the memory card 21 is reproduced on the LCD monitor unit 15 when the operation SW unit 13 is operated. As a result, the user of the camera-equipped television door phone system can check the visitors who are away.

  Next, a method for updating the stored contents of the flash memory unit 19 in which programs and data defining the operation of the system control microcomputer unit 16 are stored will be described in detail with reference to FIG. FIG. 2 is a flowchart of a startup process executed by the system control microcomputer unit 16 when the door phone with monitor 7 is turned on and started.

  When the door phone with monitor 7 is powered on, the system control microcomputer unit 16 reads the program in the ROM unit 20 and performs various activation processes.

  Specifically, when the door phone with monitor 7 is turned on, the system control microcomputer unit 16 first starts with the initial operation of the system control microcomputer unit 16 in step S1 (hereinafter, “step” is omitted). Next, in S2, a minimum initial setting of peripheral circuit units (multiplexing / separation circuit unit 8, video signal decompression unit 12, LCD controller unit 14, etc.) is performed.

  Next, the system control microcomputer unit 16 checks whether or not the memory card 21 is inserted in the memory card slot unit 18 via the memory card controller unit 17 in S3. If the memory card 21 is not inserted, the system control microcomputer unit 16 performs normal operation processing in S4 with the program read destination as the flash memory unit 19. On the other hand, if the memory card 21 has been inserted, the system control microcomputer unit 16 proceeds to S5 and is a file in which the update date information of the flash memory unit 19 is set in the memory card 21. The file name is “DATE. COM ”file (hereinafter, DATE file) is checked. The content of the DATE file is a text file, which is described as “2004/06/25”, and is a file indicating update date information of the flash memory unit 19. The information included in the file is registered in the flash memory unit 19 when the flash memory unit 19 is updated.

  If the DATE file exists, the system control microcomputer unit 16 acquires the update date information from the DATE file in S6. Specifically, in S6, the system control microcomputer unit 16 reads information about the update date from the DATE file, and stores the update date in a RAM (Random Access Memory) built in the system control microcomputer unit 16. Record information about. On the other hand, if the DATE file does not exist, the system control microcomputer unit 16 does not perform the process for updating the flash memory unit 19 and proceeds to S4 to perform the normal operation process.

  After the process of S6, the system control microcomputer unit 16 is a file in which information on the update method of the flash memory unit 19 is set in the memory card 21 in S7, and the file name is “SET. COM file (hereinafter referred to as SET file) is checked. If the SET file does not exist, the system control microcomputer unit 16 does not perform the process for updating the flash memory unit 19 and proceeds to S4 to perform the normal operation process. On the other hand, if the SET file exists, the system control microcomputer unit 16 sets the update method of the flash memory unit 19 based on the contents of the SET file in S8. Specifically, the system control microcomputer unit 16 records the information described in the SET file in the above-described RAM as information about the setting for the update method.

  Here, the contents of the SET file will be described with reference to FIG. In FIG. 3, the description content of the SET file is shown in a frame 101, and the setting content about the update method of the flash memory unit 19 corresponding to the SET file is shown in a frame 102.

  The SET file includes a time-out time during block erase (“BLOCK_ERASE”), a time-out time during data writing (“DATA_WRITE”), and the validity of data on the memory card 21 before the update when the flash memory unit 19 is updated. Setting whether to perform confirmation (“PRECHECK”), setting whether to perform a blank check of the flash memory unit 19 before data update (“BLANK_CHECK”), and a verification method after data update (“VERIFY_MODE”) ”) Including data defining the setting contents.

  In the example shown in FIG. 3, based on the fact that “BLOCK_ERACE” is described as “10”, the timeout time at the time of block erase is set to 10 seconds, and “DATA_WRITE” is described as “1”. Based on the above, the time-out time for data writing is set to 1 second, and “PRECHECK” is described as “1”, so that the validity of the data on the memory card 21 is checked before updating. Based on the fact that “BLANK_CHECK” is described as “1”, the flash memory unit 19 is set to perform a blank check before data update, and “VERIFY_MODE” is described as “2”. As a verification method after data update, there is a method called “Compare all data”. It is constant. Information that associates the description contents in the SET file with the setting contents for the update method is stored in the ROM unit 20 in, for example, a table format, and the system control microcomputer unit 16 uses the information shown in FIG. As shown in FIG. 4, the description contents of the SET file are converted into information about the setting contents for the update method, and the information is stored in the RAM.

  In the present embodiment, as described above, by describing the setting contents of the update method of the flash memory unit 19 in the SET file, the flash memory unit 19 is simply inserted into the card slot unit 18. Can be automatically updated by an intended update method without requiring any special operation. As a result, even when the stored content of the flash memory unit 19 is updated in a large number of monitor intercom master units 7, the processing required for the update can be simplified and the time can be shortened. In addition, it is possible to prevent an erroneous operation or the like in the door phone with monitor 7.

  In the present embodiment, the DATE file indicating the update date of the flash memory unit 19 is independent from the SET file, but this is a file that needs to be updated when the update date changes. This is because only the DATE file is used. Thereby, it is possible to avoid a situation in which the SET file is erroneously updated and the flash memory unit 19 is updated by a method other than the intended update method.

  Referring to FIG. 2 again, after the process of S8, the system control microcomputer unit 16 describes information for setting whether or not to create an update history of the flash memory unit 19 in the memory card 21 in S9. And the file name is “LOG. COM ”file (hereinafter referred to as LOG file) is checked. If the LOG file exists in the memory card 21, the system control microcomputer unit 16 performs setting for creating a history file in the memory card 21 when updating the flash memory unit 19 in S10, To S11. Examples of the setting for creating a history file include registration of information for creating a history file in the above-described RAM (setting a flag, etc.). On the other hand, if the LOG file does not exist in the memory card 21, the system control microcomputer unit 16 proceeds to S11 as it is.

  Here, the contents of the history file will be described with reference to FIG. In FIG. 4, the description content of the history file is shown in a frame 111, and the history content based on the description content of the history file is shown in a frame 112.

  In the history file, hardware such as a model name (“NAME”), a hardware version (“VERSION”), a serial number (“SERIAL”), and a production date (“DATE”) of the doorphone with monitor 7 is displayed. The information ("DATA") of the date (date of update) to be updated in the storage information of the flash memory unit 19 and the block of the flash memory unit 19 are divided into a plurality of areas as a minimum unit. Information such as version information (“V”) before and after updating for each area, presence / absence of block erase (“E”), and the like are included.

  In the example shown in FIG. 4, since “DATE” is described as “2004/06/25”, it is recorded that the storage information of the flash memory unit 19 was updated on June 25, 2004. Since “P0 E1 V14-> V15 OK” is described, the parameter block 0 of the flash memory unit 19 has a block erase, and the block has been updated from version 14 to version 15. Will be recorded.

  An example of the hierarchical structure when the history file as shown in FIG. 4 is recorded in the memory card 19 is shown in the frame 120 of FIG.

  Referring to FIG. 5, the history file is created under the LOG_FILE directory indicating that a history file has been created in memory card 21.

  Under the LOG_FILE directory, a directory (such as “20040624”) indicating the update date is created based on the information about the update date of the flash memory unit 19 acquired from the DATE file, and the hierarchy below the directory In addition, a history file with a different file name is created for each update of the flash memory unit 19. The file name of the history file is “000001. log ”is determined based on a rule in which the number increases with each update.

  Thus, by leaving the update history file of the flash memory unit 19 at the update source, the version of the program and data can be managed at the update source, and even when some trouble such as an update error occurs, There is an advantage of facilitating tracking.

  Next, an explanation will be given regarding the actual processing for updating the stored contents of the flash memory unit 19.

  FIG. 6 shows the relationship between the memory map configuration (block configuration) of the flash memory unit 19 of the present embodiment and the file name of the corresponding update data.

  Referring to FIG. 6, flash memory unit 19 includes eight parameter blocks “parameter block 0” to “parameter block 7” and 15 main blocks “main block 0” to “main block 14”. . Each block of the parameter block has a capacity of 8 Kbytes, and is mainly used for storing system setting data. Each block of the main block has a capacity of 64 Kbytes, and is mainly used for storing programs and fixed data during normal operation. That is, the capacity of the flash memory unit 19 is 1024 Kbytes in total.

  The flash memory unit 19 is configured so that each block can be collectively erased in units of blocks.

  In the update data stored in the memory card 21, an update data file name corresponding to each block of the parameter block such as “PAR — 0.s32” and “PAR — 1.s32” is defined. When it is detected that the memory card 21 stores these files, the parameter block corresponding to the detected file in “parameter block 0” to “parameter block 7” is updated.

  There are 15 main blocks in the flash memory unit 19, but there is only one corresponding update data file (“MAIN.s32”), and when this file is detected in the memory card 21, Updates are made.

  FIG. 7 shows the functions assigned to each block of the flash memory unit 19 in the present embodiment in the form of a table.

  Referring to FIG. 7, the parameter block of the flash memory unit 19 includes production information, a video decoder unit 11, a video compression / decompression unit 12, an LCD controller unit 14, a memory card controller unit 17, and a TV door phone system with a camera. Are stored separately for each block.

  As understood from FIGS. 6 and 7, in this embodiment, each component (video decoder unit 11, video compression / decompression unit 12, etc.) in the system stored in the parameter block of the flash memory unit 19 is stored. The update file to be used is divided for each register setting value, program stored in the main block, and fixed data. As a result, when the flash memory 19 is updated, only the minimum necessary blocks can be updated. Therefore, it is possible to avoid dangers such as shortening the update time and erasing unrelated blocks by mistake.

  Referring to FIG. 2 again, in S11, the system control microcomputer unit 16 executes a process of updating the parameter block of the flash memory unit 19 (parameter block update process). Next, in S12, the flash memory unit 19 After executing the process of updating the main block (main block update process), the normal operation process of S4 is executed.

  Here, the contents of the parameter block update process will be described in detail with reference to FIGS. 8 and 9 are flowcharts of a subroutine of parameter block update processing.

  In the parameter block update process, the system control microcomputer unit 16 first stores the file name “PAR — 0. It is confirmed whether or not the file of “s32” (hereinafter referred to as PAR_0 file) exists. The PAR_0 file is a data file for updating the parameter block 0, and is described in, for example, a commonly used Motorola S format. The PAR_0 file includes address information, data, and checksum information for each fixed amount of data (for example, 16 bytes) according to the format of the Motorola S format. Further, the PAR_0 file is defined near the highest address of the PAR_0 file. The version information of this data is written at the address.

  If the PAR_0 file exists, the system control microcomputer unit 16 obtains the version information of the PAR_0 file in S1102, and obtains the version information about the data currently stored in the parameter block 0 in S1103, and In S1104, these are compared. Then, only when the version of the PAR_0 file is newer, the process proceeds to S1105, and the process for updating the parameter block 0 is continued. Note that version information (management information) for data currently stored in the parameter block 0 is written at a predetermined address in the parameter block 0. Since version information is also included in the PAR_0 file on the memory card 21, when the parameter block 0 is updated, the parameter information in the updated parameter block 0 data is also automatically updated. Become. As described above, the update process is performed only when the version of the file on the memory card 21 is newer, so that an unnecessary operation for updating the flash memory unit 19 is not performed. It becomes possible to improve safety. In addition, since the data management information stored in the memory card 21 includes data management information (PAR_0 file or the like), the management information is also transferred to the flash memory unit 19 when the flash memory unit 19 is updated. It becomes possible to write. As a result, it becomes possible to clarify the features of the program and data written in the flash memory unit 19 after the update, so that the safety of the system can be improved.

  On the other hand, if the PAR_0 file does not exist, or if it is determined that the version of the PAR_0 file is old as a result of the comparison in S1104, the system control microcomputer unit 16 does not update the parameter block 0, and proceeds to S1117. Update work after parameter block 1 is performed. Details of the processing contents in S1117 will be described later.

  In step S1105, the system control microcomputer unit 16 checks a setting as to whether or not to confirm the validity of the data file on the memory card 21 before the update in the SET file as described with reference to FIG. If it is set to confirm the validity, the system control microcomputer unit 16 proceeds to S1106 after confirming the validity of the PAR_0 file. On the other hand, if it is set not to check the validity, the system control microcomputer unit 16 advances the processing to S1107. The validity of the PAR_0 file is confirmed by confirming whether the relationship between the data included in the PAR_0 file and the checksum matches.

  In step S1106, the system control microcomputer unit 16 checks the result of confirmation of the validity of the PAR_0 file. Specifically, it is checked whether or not the relationship between the data in the PAR_0 file and the checksum matches. If they match, the system control microcomputer unit 16 assumes that the validity of the data has been confirmed, advances the process to S1107, and continues the process for updating. On the other hand, if the relationship between the data and the checksum does not match, the system control microcomputer unit 16 determines that there has been some modification or recording error in the data, does not update the parameter block 0, and advances the processing to S1114.

  In step S1107, the system control microcomputer unit 16 checks the setting in the SET file as to whether or not to perform a blank check before updating. If it is set to perform a blank check, the system control microcomputer unit 16 performs a blank check and advances the process of S1108. The blank check is performed by reading the data of the parameter block to be processed. The result of the blank check is a blank state when all the data is FFh, and a non-blank state otherwise.

  On the other hand, if it is set in the SET file not to perform the blank check, the system control microcomputer unit 16 advances the process to S1110.

  In S1108, the system control microcomputer unit 16 checks the result of the blank process. If the result is a non-blank state, the system control microcomputer unit 16 performs a block erase process to erase the parameter block to be processed in S1109 and performs the process in S1110. Proceed. If the result of the blank process is a blank state, the system control microcomputer unit 16 proceeds directly to S1110.

  In S1110, the system control microcomputer unit 16 updates the parameter block 0 of the flash memory unit 19 according to the data of the PAR_0 file stored in the memory card 21, and advances the process to S1111.

  In step S1111, the system control microcomputer unit 16 checks a setting in the SET file as to whether to perform verification confirmation after updating. If the setting is such that confirmation is performed, the system control microcomputer unit 16 compares the PAR_0 file on the memory card 21 with the updated data of the parameter block 0 of the flash memory unit 19 as verification verification. , The process proceeds to S1112. The comparison method includes two methods, a method of comparing all data and a method of comparing only the checksum. When all the data are compared, the confirmation accuracy is high, but the confirmation time is required. When only the checksum is compared, the confirmation time is short, but the confirmation accuracy decreases. These methods can be selected by setting in the SET file (“VERIFY_MODE”). On the other hand, if the setting is such that the confirmation is not performed, the system control microcomputer unit 16 advances the processing to S1113.

  In step S <b> 1112, the system control microcomputer unit 16 checks the verification confirmation result. If there is no problem in the verification confirmation result, the process proceeds to step S <b> 1113. On the other hand, if there is a problem in the verification result, the system control microcomputer unit 16 does not write update date information in S1113, which will be described later, and proceeds to S1114.

  In S1113, the system control microcomputer unit 16 writes the update date information acquired from the DATE file on the memory card 21 to a specified address near the highest address of the parameter block 0, and advances the process to S1114. In S1113, when the storage contents of the flash memory unit 19 are updated, the date information is recorded in the flash memory unit 19, so that in the case where a problem occurs in the updated system, the system It becomes easy to trace the cause of the failure. Further, on the memory card 21, since the DATE file indicating the update date information exists as a file independent of the files that define other update operations, even if the update date of the flash memory unit 19 changes, It is possible to prevent a file that defines another update operation in the flash memory unit 19 from being erroneously updated.

  In S1114, the system control microcomputer unit 16 checks whether or not it is set to create a history file (see FIG. 4) in the LOG file. If it is set to create a history file, the system control microcomputer unit 16 creates a history file on the memory card 21 in S1115, and advances the process to S1116. This history file also records information such as update failure. On the other hand, if it is set not to create a history file, the system control microcomputer unit 16 proceeds directly to S1116. Thus, by creating a history file on the memory card 21, even if a problem occurs when updating the stored contents of the flash memory unit 19, it is possible to track the cause of the problem.

  In S1116, the system control microcomputer unit 16 checks whether the update of the parameter block 0 has succeeded without any problem. “No problem” means that there is no problem in the validity of the PAR_0 file in S1106, and there is no problem in the verification result in S1112. If there is no problem, the process proceeds to S1117. On the other hand, if it is determined in S1116 that there is a problem in updating the parameter block 0 and the update has failed, the system control microcomputer unit 16 performs an error process and interrupts the update process. As the error process, for example, a process for displaying a message indicating that the update has failed on the LCD monitor unit 15 can be considered.

  In S <b> 1117, the system control microcomputer unit 16 sequentially performs processing for updating the parameter blocks 1 to 7 in the same manner as the parameter block 0 performed in S <b> 1101 to S <b> 1116. In S1117, “PAR — 0.. s32 "(PAR_0 file), for each of the parameter blocks 1 to 7," PAR_1. s32 "," PAR_2. s32 "," PAR_3. s32 "," PAR_4. s32 "," PAR_5. s32 "," PAR_6. s32 "," PAR_7. s32 "is used.

  Specifically, for example, “PAR_1. If there is a file named “s32”, the parameter block 1 is updated, and “PAR_2. If a file named “s32” exists, the parameter block 2 is updated, and “PAR — 3. If a file named “s32” exists, the parameter block 3 is updated, and “PAR — 4. If a file named “s32” exists, the parameter block 4 is updated, and “PAR — 5. If a file named “s32” exists, the parameter block 5 is updated, and “PAR — 6.. If a file named “s32” exists, the parameter block 6 is updated, and “PAR — 7. If a file named “s32” exists, the parameter block 7 is updated.

  In addition, “PAR_1. s32 "" PAR_2. s32 "" PAR_3. s32 "" PAR_4. s32 "" PAR_5. s32 "" PAR_6. s32 "" PAR_7. Each file of “s32” includes address information, data, and checksum information for each fixed amount of data (for example, 16 bytes) according to the format of the Motorola S format, like the PAR_0 file. Version information of data included in the file is described at a prescribed address near the highest address of the file.

  In the present embodiment, the system control microcomputer unit 16 reads “PAR — 0. s32 "and" PAR_1. Whether or not to update the parameter block is determined based on whether or not a file having a file name such as “s32” exists on the memory card 21. In addition, “PAR — 0. s32 "and" PAR_1. The file name itself such as “s32” is stored in advance in the ROM unit 20 as the file name of the file for updating the parameter block. Then, when the system control microcomputer unit 16 determines whether each file exists in the memory card 21, “PAR — 0. s32 "and" PAR_1. The file name such as “s32” is compared with the file name of each file stored in the memory card 21, and a determination is made based on the comparison result.

  Then, when the process for updating the parameter blocks 1 to 7 in S1117 is completed, the system control microcomputer unit 16 returns the process.

  When the parameter block update process described with reference to FIGS. 8 and 9 is completed, the system control microcomputer unit 16 executes a main block update process as shown as S12 in FIG. Here, the content of the main block update process will be described in detail with reference to FIG. 10 and FIG. 10 and 11 are flowcharts of a subroutine of the main block update process.

  In the main block update process, the system control microcomputer unit 16 first stores the file name “MAIN. It is checked whether or not a file “s32” (hereinafter referred to as a MAIN file) exists. If it is determined that the MAIN file exists, the process proceeds to S1202. If it is determined that the MAIN file does not exist, the main block update process is terminated and the process returns. The MAIN file is a data file for updating the main blocks 0 to 14, and is described in, for example, the Motorola S format in the same manner as the parameter block updating data file. The MAIN file according to the present embodiment includes address information, data, and checksum information for each fixed amount of data (for example, 16 bytes) in accordance with the Motorola S format. Version information of this data is described at the specified address.

  “MAIN. The file name “s32” is stored in advance in the ROM unit 20 as the file name of the file for updating the main block. Then, the system control microcomputer unit 16 stores “MAIN. When determining whether or not a file with the file name “s32” exists, “MAIN. The file name “s32” is compared with the file name of each file stored in the memory card 21, and a determination is made based on the comparison result.

  Next, the system control microcomputer unit 16 acquires the version information of the MAIN file in S1202, acquires the version information currently stored in the main block 14 (see FIGS. 6 and 7) in S1203, and In S1204, these are compared. If the system control microcomputer 16 determines that the version information of the MAIN file is newer, the system control microcomputer 16 proceeds to S1205. If the version information of the one currently stored in the main block 14 is determined to be newer, the main block update is performed. End the process and return. That is, the process for updating the main block is continued only when the MAIN file has newer version information.

  In step S1205, the system control microcomputer unit 16 checks whether or not the SET file is set to confirm the validity of the data file on the memory card 21 before the update. If the setting is to be confirmed, the validity of the MAIN file is checked in S1206. If the setting is not to be confirmed, the process proceeds to S1207.

  If there is no problem as a result of checking the validity of the MAIN file in S1206, the system control microcomputer unit 16 advances the process to S1207. The validity of the MAIN file is confirmed by checking whether or not the data included in the MAIN file matches the checksum relationship. If the relationship between the data and the checksum matches, it is determined that there is no problem with the validity of the data. On the other hand, if the relationship between the data and the checksum does not match, the system control microcomputer unit 16 proceeds to S1214, assuming that there is a problem with the validity of the MAIN file.

  In S1207, the system control microcomputer unit 16 checks whether or not a setting for performing a blank check is made before the update in the SET file, and if it is set to perform a check, performs a blank check in S1208. In the blank check, the data of the main block is read. If all the data is FFh, it is determined to be in a blank state, and in other cases, it is determined to be a non-blank state. On the other hand, if the setting is such that the blank check is not performed, the system control microcomputer unit 16 advances the process from S1207 to S1210.

  In S1208, if the result of the check is that the system control microcomputer unit 16 is in a non-blank state, the system control microcomputer unit 16 proceeds to S1210 after executing a block erase process for erasing the main block in S1209. Proceed with the process.

  In S1210, the system control microcomputer unit 16 updates the main blocks 0 to 14 in accordance with the MAIN file data on the memory card 21, and advances the process to S1211.

  In step S1211, the system control microcomputer unit 16 checks whether or not the setting for verifying verification has been made after the update in the SET file. If it is set to perform verification check, the system control microcomputer unit 16 performs verification verification in S1212. If it is set not to perform verification, the process proceeds to S1213 without performing verification verification. To proceed. In S1212, the system control microcomputer unit 16 checks the result of the verification confirmation. If there is no problem in the result, the process proceeds to S1213. If there is a problem, the process proceeds to S1214. The verification check is performed by comparing the MAIN file on the memory card 21 with the data in the main blocks 0 to 14 of the flash memory unit 19. Further, the verification method corresponds to “VERIFY_MODE” in the SET file.

  In S <b> 1213, the system control microcomputer unit 16 writes the update date information acquired from the DATE file on the memory card 21 to an address defined near the highest address of the main block 14 in the flash memory unit 19. If a problem is found in the verification confirmation result, the process of S1213 is not executed, so that the update date information is not written.

  In S1214, the system control microcomputer unit 16 checks whether or not the setting for creating a history file is set in the SET file. If it is set to create a history file, the system control microcomputer 16 advances the process to S1215, creates a history file on the memory card 21, and advances the process to S1216. In the history file created here, information such as update failure is also recorded. On the other hand, if the setting is such that the history file is not created, the system control microcomputer unit 16 proceeds directly to S1216.

  In S1216, the system control microcomputer unit 16 determines whether the update of the main blocks 0 to 14 has succeeded without any problem. Here, “no problem” specifically means that the validity of the MAIN file in S1206 is confirmed, and there is no problem in the result of verification in S1212. If the update of the main blocks 0 to 14 succeeds without any problem, the system control microcomputer unit 16 returns the process on the assumption that all the updates of the flash memory unit 19 have been completed. On the other hand, when the update of the main blocks 0 to 14 fails, the system control microcomputer unit 16 performs error processing in S1217 and interrupts the update processing.

  In the present embodiment described above, checksum information is added to each of the update data files (“PAR — 0.s32”, “PAR — 1.s32”, etc.) stored in the memory card 21 in S1106. Therefore, the validity of the updated data in the flash memory unit 19 can be confirmed, so that the safety of the system can be improved, and the time for checking the updated data after the update can be shortened.

[Second Embodiment]
Next, a camera-equipped TV door phone system having a memory card slot according to a second embodiment of the present invention will be described. FIG. 12 is a control block diagram of the door phone with monitor in the TV door phone system with camera of the present embodiment. The TV door phone system with a camera according to the present embodiment includes a door phone with a monitor and a door phone with a camera. The door phone with a camera is a door phone with a camera described in the first embodiment. The configuration can be the same as that of the machine 1.

  Referring to FIG. 12, monitor-equipped doorphone master unit 60 is, for example, a type that is fixedly installed indoors, and includes a system control microcomputer unit 69 that controls the entire system of monitor-equipped doorphone master unit 60. I have.

  The monitor-equipped doorphone master unit 60 separates the video signal, the audio signal, and the calling signal that are multiplexed and transmitted from the camera-equipped doorphone slave unit, and also transmits the audio signal, the control signal, and the camera signal from the monitor-equipped doorphone master unit. A multiplexing / separating circuit unit 61 that multiplexes electricity for operating the attached doorphone slave unit and transmits it to the doorphone slave unit with camera is provided.

  Furthermore, the monitor-equipped doorphone master unit 60 is connected to the speaker unit 62 that reproduces the voice signal from the camera-equipped doorphone slave unit and is uttered by the demultiplexing circuit unit 61, and the camera-equipped doorphone slave unit. A digital video signal obtained by decoding an analog video signal from a camera-equipped doorphone slave unit that is separated by a microphone unit 63 for converting voice input into an electrical signal to transmit voice and a multiplexing / separating circuit unit 61 A video decoder unit 64 for converting to a video signal, a video signal compression / decompression unit 65 for compressing the video signal digitized by the video decoder unit 64 and for decompressing the compressed digital video signal input from the system control microcomputer unit 69. , The operation SW unit 66 that is operated for response to various calls from the door phone slave unit with camera and various operations, L for displaying information D monitor section 68, LCD controller section 67 for converting the video signal from video signal compression / expansion section 65 so that it can be displayed on LCD monitor section 68 and creating a drive signal, Memory card slot section for inserting a memory card 71, a memory card controller 70 for controlling the memory card 72 inserted in the memory card slot section 71, and a flash for storing programs and data for the system control microcomputer section 69 to cause the monitor-equipped doorphone master unit 60 to perform a normal operation. Production of ROM unit 74 for storing a program for causing memory unit 73, system control microcomputer unit 69 to start monitor-equipped doorphone master unit 60, or updating the stored contents of flash memory unit 73, and monitor-equipped doorphone master unit 60 Sometimes with a personal computer (PC) etc. And an external connection portion 75 for serial transmission to update data of the flash memory unit 73 to the system control microcomputer unit 69 by connection. The flash memory unit 73 is composed of a nonvolatile memory that can be read and written from the system control microcomputer unit 69. The ROM unit 74 is configured by a nonvolatile memory that can only be read from the system control microcomputer unit 69. Further, the memory card 72 is configured to be detachable from the door phone with monitor 60.

  Next, a method for updating the contents stored in the flash memory unit 73 in the monitor intercom base phone 60 according to the present embodiment will be described.

  In the door phone 60 with a monitor, as a method of updating the contents stored in the flash memory unit 73, a method of updating with a file having a predetermined file name on the memory card 72, a PC connected to the external connection unit 75, or the like. The update method can be exemplified by receiving update data by serial transmission. The details of each updating method are the same as the methods proposed in the first embodiment and Japanese Patent Laid-Open No. 2000-122894, and the detailed description thereof will not be repeated.

  FIG. 13 shows, in a tabular form, information on whether or not writing is permitted for two update methods for each block of the flash memory unit 73. Note that the flash memory unit 73 is defined with parameter blocks 0 to 7 and main blocks 0 to 14 as in the flash memory unit 19 in the first embodiment. Information as shown in FIG. 13 is stored in the ROM section 74.

  Referring to FIG. 13, for blocks other than parameter block 0, an update method using memory card 72 and an update method using external connection unit 75 are permitted. However, for parameter block 0, a memory card is used. The update method using 72 is not permitted. This is because parameter block 0 stores data such as information related to production (production date, production location, serial number, etc.) that does not need to be updated or is not appropriate to be updated once written. This is because. Since the data in the parameter block 0 is not permitted to be updated using the memory card 75, forgery of the system can be avoided and safety can be ensured.

  FIG. 14 shows a flowchart of the writing process of the flash memory unit 73 executed by the system control microcomputer unit 69 at the time of production of the monitor door phone parent device 60 of the present embodiment.

  In the writing process, the system control microcomputer unit 69 first writes the flash memory unit 73 using the memory card 72 in SA1. Specifically, the system control microcomputer unit 69 stores the program, fixed data, register setting values of the peripheral circuit unit, etc. stored in the blocks other than the parameter block 0 in the flash memory unit 73 on the memory card 72. Update as appropriate by writing the corresponding information. At this time, the system control microcomputer unit 69 sets FFh for the address of the set value that needs to be individually adjusted, and does not perform writing.

  Next, at SA2, the system control microcomputer unit 69 uses the external connection unit 75 to set the setting values that need to be individually adjusted for each monitor-equipped doorphone master unit, such as the common bias setting of the LCD controller unit 67. Write.

  Next, in SA3, the system control microcomputer unit 69 uses the external connection unit 75 to write information related to production such as production date and time, serial number, etc. to the parameter block 0. At the time of production, by writing to the flash memory unit 73 by the above two types of writing methods, a common program and fixed data occupying most of the capacity can be used by using the memory card 72. Writing is performed at a speed faster than writing through the external connection unit 75. Then, a small amount of setting values and production-related information that need to be adjusted individually are written using the more versatile external connection unit 75, so that the flash memory unit 73 can be written efficiently and in a short time. Is included.

  In the door phone main unit 60 with a monitor according to the present embodiment, when updating the storage contents of the flash memory unit 19, an update method using the memory card 72 and an update method using the external connection unit 725 using an external device are referred to. Updating by two methods is possible. As a result, it is possible to use different update methods according to the capacity and characteristics of the update data, so that the update time of the flash memory unit 19 can be shortened and the efficiency can be improved.

  Further, in the door phone base unit 60 with a monitor according to the present embodiment, when the storage contents of the flash memory unit 19 are updated, the flash memory unit 19 depends on the storage location (memory card 72 or external device) of data used for the update. Since the updatable storage area can be changed, the storage contents in the flash memory 19 can be protected according to the storage location of the data used for the update, thereby improving the safety of the system. It becomes possible.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

It is a control block diagram of the television door phone system with a camera which is the 1st Embodiment of this invention. It is a flowchart of the starting process which a system control microcomputer performs, when the doorphone main unit with a monitor of FIG. It is a figure for demonstrating the content of the SET file memorize | stored in the memory card of FIG. It is a figure for demonstrating the content of the history file produced in the memory card of FIG. FIG. 5 is a diagram showing an example of a hierarchical structure when a history file as shown in FIG. 4 is recorded on a memory card. It is a figure which shows the block structure of the flash memory part of FIG. 1, and the relationship between the file name of corresponding update data. It is a figure which shows the function allocated for every block of the flash memory part of FIG. 1 in a table format. It is a flowchart of the subroutine of the parameter block update process of FIG. It is a flowchart of the subroutine of the parameter block update process of FIG. It is a flowchart of the subroutine of the main block update process of FIG. It is a flowchart of the subroutine of the main block update process of FIG. It is a control block diagram of the door phone main unit with a monitor in the television door phone system with a camera which is the 2nd Embodiment of this invention. It is a figure which shows the information regarding whether writing is permitted regarding two update methods about each block of the flash memory part of FIG. 12 in a table format. 13 is a flowchart of a writing process in a flash memory unit during production of the monitor-equipped doorphone master unit of FIG.

Explanation of symbols

  1 doorphone with camera, 2 camera unit, 3, 9, 62 speaker unit, 4, 10, 63 microphone unit, 5 call SW unit, 6, 8, 61 demultiplexing circuit unit, 7, 60 door phone with monitor Master unit, 11, 64 Video decoder unit, 12 Video signal compression / decompression unit, 13, 66 Operation SW unit, 14, 67 LCD controller unit, 15, 68 LCD monitor unit, 16, 69 System control microcomputer unit, 17, 70 Memory Card controller unit, 18, 71 Memory card slot unit, 19, 73 Flash memory unit, 20, 74 ROM unit, 21, 72 Memory card, 65 Video signal compression / decompression unit, 75 External connection unit, 76 PC.

Claims (11)

A door phone system including a parent device installed indoors and a child device that is installed apart from the parent device and configured to be communicable with the parent device,
A control unit for controlling the operation of the door phone system;
A first and second storage device for storing a program executed by the control unit for controlling the operation of the door phone system and data for executing the program;
A housing for housing the control unit;
A recording medium processing apparatus that reads and writes information from and to a recording medium configured to be detachable from the housing;
The first storage device includes a nonvolatile memory that can read and write information by the control unit,
The second storage device is a non-volatile memory that can only read information by the control unit, and a file of a predetermined file including a file that describes setting contents for an update method of the first storage device Remember your name,
The controller is
Based on the program stored in the second storage device, the information recorded on the recording medium is read via the recording medium processing device, and
When it is determined that the predetermined file exists on the recording medium by referring to the file name stored in the second storage device and the file name of the file recorded on the recording medium, the predetermined file is stored in the predetermined file . Update at least one of the program and data stored in the first storage device without storing the file describing the setting content for the update method in the first storage device in accordance with the setting content to be described. , Door phone system. The door phone system according to claim 1, wherein the predetermined file further includes a file in which update data corresponding to at least one of a program and data stored in the first storage device is described.   The door phone system according to claim 2, wherein the file in which the update data is written is divided and recorded on the recording medium as a different file with a predetermined capacity.   The door phone system according to claim 2 or 3, wherein the file in which the update data is described includes checksum information for each fixed amount of data in the file.   The management information of at least one of the program and data stored in the first storage device is stored in a predetermined storage location in the first storage device. Door phone system as described in. The management information is information representing a version of at least one of a program and data stored in the first storage device,
In the predetermined file, information indicating a version of the predetermined file is described,
The control unit compares information representing at least one version of the program and data stored in the first storage device with information representing the version of the predetermined file, and the latter represents a newer version. The door phone system according to claim 5, wherein at least one of the program and data stored in the first storage device is updated only when the information is information. The predetermined file includes date information that is information indicating an update date of the first storage device,
The said control part makes the said 1st memory | storage device memorize | store the said date information, when at least one of the program memorize | stored in the said 1st memory | storage device and data is updated. Item 7. A door phone system according to any one of Items 6 to 7.   The door phone system according to claim 7, wherein the date information is recorded as one file in which only the date information is recorded on the recording medium.   When the predetermined file includes information instructing to create information relating to the update history of the first storage device, the control unit stores the program and data stored in the first storage device The door phone system according to any one of claims 1 to 8, wherein when at least one of the information is updated, information related to an update history of the first storage device is recorded on the recording medium. It further includes an external connection unit that enables transmission / reception of information to / from an external device,
The said control part updates the at least one of the program and data which were memorize | stored in the said 1st memory | storage device further using the data received from the external apparatus via the said external connection part. Item 10. The door phone system according to any one of Items 9 to 9. A door phone system including a parent device installed indoors and a child device that is installed apart from the parent device and configured to be communicable with the parent device,
A control unit for controlling the operation of the door phone system;
A first and second storage device for storing a program executed by the control unit for controlling the operation of the door phone system and data for executing the program;
A housing for housing the control unit;
A recording medium processing apparatus that reads and writes information from and to a recording medium configured to be detachable from the housing;
The first storage device includes a nonvolatile memory that can read and write information by the control unit,
The second storage device is configured by a nonvolatile memory that can only read information by the control unit, and stores a file name of a predetermined file that is a file related to the update of the first storage device,
The controller is
Based on the program stored in the second storage device, the information recorded on the recording medium is read via the recording medium processing device, and
When it is determined that the predetermined file exists on the recording medium by referring to the file name stored in the second storage device and the file name of the file recorded on the recording medium, the predetermined file is Using, updating at least one of the program and data stored in the first storage device;
It further includes an external connection unit that enables transmission / reception of information to / from an external device,
The control unit further utilizes data received from an external device via the external connection unit, and updates at least one of the program and data stored in the first storage device,
The second storage device includes a storage area that allows the first storage device to be updated when the predetermined file recorded on the recording medium is updated using the external connection unit. external is the memory area that allows updated when updating that is using the received data from the device via the stores as at least part different, de Aho down system.

Images