JP2011059974A - Access controller - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an access controller for creatively using a single recording medium according to operation modes. <P>SOLUTION: A CPU 32 selectively starts, in response to the operation of a mode switch 32sw, an imaging task corresponding to a camera mode, a reproduction task corresponding to a reproduction mode, a setting change task corresponding to a setting change mode, and a USB communication task corresponding to a USB communication mode. An access is performed by the started task to a flash memory 38 with a plurality of partitions formed therein. The CPU 32 permits the started task to perform access to a partial partition corresponding to the selected operation mode among a plurality of partitions. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an access control apparatus, and more particularly to an access control apparatus that controls an access operation to a recording medium on which a plurality of partitions are formed.

  An example of this type of device is disclosed in Patent Document 1. According to this background art, a CPU, an EEPROM (registered trademark), and a flash memory are mounted inside a module of a semiconductor memory card. The use area of the EC client application provided in the EEPROM is expanded by arranging a partition table in the EEPROM and generating a partition in the flash memory. Since the partition table is arranged in the EEPROM inside the module, the partition table can be accessed only by the CPU inside the module. This increases the confidentiality of the EC client application.

JP 2009-176306 A

  However, in the background art, accessible partitions are not selectively used depending on the operation mode.

  SUMMARY OF THE INVENTION Therefore, a main object of the present invention is to provide an access control apparatus that can use a single recording medium depending on an operation mode.

  A data processing apparatus according to the present invention (10: reference numerals corresponding to the embodiments; the same applies hereinafter) is assigned to a plurality of operation modes for access processing to a recording medium (38) on which a plurality of partitions are formed. A plurality of access means (S41, S57, S61, S65, S71, S85, S91, S103, S107), a selection means (S3, S7, S17, S23) for selecting one of a plurality of operation modes, a plurality of An activation unit (S5, S9, S19, S25) for activating an access unit corresponding to the operation mode selected by the selection unit among the access units, and one corresponding to the operation mode selected by the selection unit among the plurality of partitions. Permission means (S11, S21, S27, S29) for permitting the access means activated by the activation means to access to the partitions of the unit.

  Preferably, the permission unit sets a part of identifiers corresponding to the operation mode selected by the selection unit among the plurality of identifiers for identifying the plurality of partitions in the register (RGST1), and each of the plurality of access units is a register. Access processing is executed with reference to the setting state of.

  Preferably, the plurality of partitions include a first partition for storing image data, the plurality of operation modes include an image recording / playback mode, and the plurality of access means access the first partition corresponding to the image recording / playback mode. First access means (S57, S65).

  Preferably, reproduction means (S73) for reproducing font data for guide display is further provided, the plurality of partitions include a second partition for storing alternative font data, and the plurality of operation modes include a setting change mode, The plurality of access means includes second access means (S85) for accessing the second partition corresponding to the setting change mode.

  Preferably, the plurality of partitions include a third partition for storing operation manual data, the plurality of operation modes include an external transfer mode, and the plurality of access means accesses a third partition corresponding to the external transfer mode. Access means (S103) is included.

  An access control program according to the present invention includes a plurality of processors assigned to a plurality of operation modes for access processing to a recording medium (38) in which a plurality of partitions are formed in a processor (32) of an access control device (10). Access steps (S41, S57, S61, S65, S71, S85, S91, S103, S107), a selection step (S3, S7, S17, S23) for selecting one of a plurality of operation modes, a plurality of accesses An activation step (S5, S9, S19, S25) for activating an access means corresponding to the operation mode selected by the selection step among the means, and a part corresponding to the operation mode selected by the selection step among the plurality of partitions Access control program to execute the permission steps (S11, S21, S27, S29) that allow the access means activated by the activation step to access the partitions of Is.

  The access control method according to the present invention is an access control method executed by the access control device (10), and each of the plurality of operation modes is used for access processing to the recording medium (38) in which a plurality of partitions are formed. A plurality of assigned access steps (S41, S57, S61, S65, S71, S85, S91, S103, S107) and a selection step (S3, S7, S17, S23) for selecting one of a plurality of operation modes A startup step (S5, S9, S19, S25) for starting the access means corresponding to the operation mode selected by the selection step among the plurality of access means, and the operation mode selected by the selection step among the plurality of partitions. A permission step (S11, S21, S27, S29) for permitting access to the corresponding partial partition to the access means activated by the activation step.

  According to the present invention, when a certain operation mode is selected, a certain access means corresponding to the selected operation mode accesses a certain partition. When another operation mode is selected, another access means corresponding to the selected operation mode accesses another part of the partition. Thereby, the single recording medium 5 can be properly used according to the operation mode.

  The above object, other objects, features and advantages of the present invention will become more apparent from the following detailed description of embodiments with reference to the drawings.

It is a block diagram which shows the basic composition of this invention. It is a block diagram which shows the structure of one Example of this invention. It is an illustration figure which shows an example of the mapping state of NOR type flash memory. It is an illustration figure which shows an example of the mapping state of NAND type flash memory. (A) is an illustrative view showing an example of a register setting state when a camera mode or a playback mode is selected, and (B) is an illustrative view showing an example of a register setting state when a setting change mode is selected. (C) is an illustrative view showing one example of a register setting state when the USB communication mode is selected. It is an illustration figure which shows an example of the mapping state of the NAND type flash memory recognized by each of an imaging | photography task and a reproduction | regeneration task. It is an illustration figure which shows an example of the mapping state of the NAND type flash memory recognized by the setting change task. (A) is an illustrative view showing an example of a menu screen, and (B) is an illustrative view showing another example of the menu screen. It is an illustration figure which shows an example of the mapping state of the NAND type flash memory recognized by the USB communication task. It is a flowchart which shows a part of operation | movement of CPU applied to the FIG. 2 Example. It is a flowchart which shows a part of other operation | movement of CPU applied to the FIG. 2 Example. FIG. 11 is a flowchart showing still another portion of behavior of the CPU applied to the embodiment in FIG. 2; FIG. 10 is a flowchart showing yet another portion of behavior of the CPU applied to the embodiment in FIG. 2; It is a flowchart which shows a part of other operation | movement of CPU applied to the FIG. 2 Example. FIG. 11 is a flowchart showing still another portion of behavior of the CPU applied to the embodiment in FIG. 2;

Embodiments of the present invention will be described below with reference to the drawings.
[Basic configuration]

  Referring to FIG. 1, the access control device of the present invention is basically configured as follows. The plurality of access means 1, 1,... Are respectively assigned to a plurality of operation modes for access processing to the recording medium 5 on which a plurality of partitions are formed. The selection unit 2 selects any one of a plurality of operation modes. The activation unit 3 activates the access unit corresponding to the operation mode selected by the selection unit 2 among the plurality of access units. The permission unit 4 permits the access unit activated by the activation unit to access a part of the partitions corresponding to the operation mode selected by the selection unit 2 among the plurality of partitions.

Accordingly, when a certain operation mode is selected, a certain access means corresponding to the selected operation mode accesses a certain part of the partition. When another operation mode is selected, another access means corresponding to the selected operation mode accesses another part of the partition. Thereby, the single recording medium 5 can be properly used according to the operation mode.
[Example]

  Referring to FIG. 2, the digital camera 10 of this embodiment includes a focus lens 12 and an aperture unit 14 driven by drivers 18a and 18b, respectively. The optical image of the object scene that has passed through these members is irradiated onto the imaging surface of the imager 16 and subjected to photoelectric conversion.

  When the power is turned on, the CPU 32 accesses the NOR type flash memory 40. Referring to FIG. 3, flash memory 42 includes MBR0 (MBR: Master Boot Record), PBR0 (PBR: Partition Boot Record), FAT0 (FAT: File Allocation Table), directory entry 0, and data area 0. Here, in the data area 0, a μIRON specification OS (Operating System), a program corresponding to a plurality of tasks (details will be described later) executed under this OS, and a font serving as a basis for text representing menu items Data etc. are stored.

  The CPU 32 first recognizes the mapping state of the flash memory 40 by referring to the descriptions of MBR0 and PBR0, and then starts the OS and the main task by referring to the FAT0 and the directory entry 0.

  In the main task, the setting of the mode selector switch 34sw provided in the key input device 34 (that is, the current operation mode) is determined, and the task corresponding to the current operation mode is activated. If the current operation mode is the camera mode, the imaging task is activated, and if the current operation mode is the reproduction mode, the reproduction task is activated. If the current operation mode is the setting change mode, the setting change task is activated. If the current operation mode is the USB communication mode, the USB communication task is activated.

  The NAND flash memory 38 is accessed in any of the camera mode, playback mode, setting change mode, and USB communication mode. Referring to FIG. 4, flash memory 38 has slots 1 to 3.

  Here, slot 1 is formed by MBR1, PBR1, FAT1, directory entry 1 and data area 1, slot 2 is formed by MBR2, PBR2, FAT2, directory entry 2 and data area 2, and slot 3 is MBR3, PBR3. , FAT3, directory entry 3 and data area 3.

  The offset OFST1 described in the partition table of MBR1 indicates the distance from the beginning of MBR1 to the beginning of PBR1, the offset OFST2 described in the partition table of MBR2 indicates the distance from the beginning of MBR2 to the beginning of PBR2, The offset OFST3 described in the partition table of MBR3 indicates the distance from the head of MBR3 to the head of PBR3.

  Further, the data area 1 is prepared for storing image files, the data area 2 is prepared for storing alternative font data in place of the font data stored in the flash memory 40, and the data area 3 is prepared for the digital camera 10. Prepared to store operation manual data.

  When the imaging task or the reproduction task is activated, “ADRS1”, which is the start address of slot 1, is set in the register RGST1 as shown in FIG. When the setting change task is activated, “ADRS2”, which is the start address of slot 2, is set in the register RGST1 as shown in FIG. 5B. Further, when the USB communication task is activated, ADRS1 which is the leading address of slot 1 and ADRS3 which is the leading address of slot 3 are set in register RGST1 in the manner shown in FIG. 5C.

  The started task recognizes the mapping state of the flash memory 38 with reference to the setting of the register RGST1. Therefore, under the imaging task and the reproduction task, the flash memory 38 is recognized as having the mapping shown in FIG. Under the setting change task, the flash memory 38 is recognized as having the mapping shown in FIG. Further, under the USB communication task, the flash memory 38 is recognized as having the mapping shown in FIG.

  As a result, the activated task accesses the flash memory 38 without being aware of the actual mapping state of the flash memory 38. For memory accesses that do not require consideration of the actual mapping state, a partition table is provided for each of MBR1 to MBR3, and the distance from the head of MBR * (*: 1 to 3, the same applies hereinafter) to PBR * is offset. This is realized by describing it in the partition table of MBR * as OFST * and setting the head address of the slot to which access is permitted in register RGST1.

  When the imaging task is activated, the CPU 32 instructs the driver 18c to repeat the exposure operation and the charge readout operation in order to execute the moving image capturing process. The driver 18c exposes the imaging surface of the imager 16 in response to a periodically generated vertical synchronization signal Vsync, and reads out the charges generated on the imaging surface in a raster scanning manner. From the imager 16, raw image data based on the read charges is periodically output.

  The signal processing circuit 20 performs processing such as white balance adjustment, color separation, and YUV conversion on the raw image data output from the imager 16, and writes the generated YUV image data to the SDRAM 24 through the memory control circuit 22. . The LCD driver 26 repeatedly reads out the image data stored in the SDRAM 24 through the memory control circuit 22 and drives the LCD monitor 28 based on the read image data. As a result, a moving image representing the object scene is displayed on the monitor screen.

  Of the image data generated by the signal processing circuit 20, Y data is also given to the CPU 32. The CPU 32 performs a simple AE process on the given Y data to calculate an appropriate EV value. The aperture amount and the exposure time that define the calculated appropriate EV value are set in the drivers 18b and 18c, respectively, whereby the brightness of the moving image is appropriately adjusted.

  When the shutter button 34 sh is half-pressed, the CPU 32 performs a strict AE process on the Y data given from the signal processing circuit 20 to calculate an optimum EV value. The aperture amount and the exposure time that define the calculated optimal EV value are set in the drivers 18b and 18c, respectively, as described above. As a result, the brightness of the moving image is adjusted strictly. The CPU 32 also performs AF processing on the high frequency component of the Y data given from the signal processing circuit 20. As a result, the focus lens 12 is placed at the focal point, and the sharpness of the moving image is improved.

  When the shutter button 34sh is fully pressed, the CPU 32 commands the I / F 36 to execute the recording process. The I / F 36 reads one frame of image data representing the object scene at the time when the shutter button 34 sh is operated from the SDARM 24 through the memory control circuit 22, and reads an image file including the read image data in the data in the flash memory 38. Write to area 1. The I / F 36 further updates the directory entry 1 and the FAT1 in connection with this writing process.

  When the reproduction task is activated, the CPU 32 detects the latest image file stored in the data area 1 with reference to the directory entry 1, and executes the reproduction process focusing on the detected image file and the I / F 36 and Commands the LCD driver 26. The I / F 36 reads the image data of the designated image file with reference to the FAT 1 and writes the read image data to the SDRAM 24 through the memory control circuit 22.

  The LCD driver 26 reads the image data stored in the SDRAM 24 through the memory control circuit 22 and drives the LCD monitor 28 based on the read image data. As a result, a reproduced image based on the image data of the designated image file is displayed on the LCD monitor 28.

  When the feed / return button 34 fw of the key input device 34 is operated, the CPU 32 refers to the directory entry 1 and detects a subsequent image file or a preceding image file. The detected image file is subjected to reproduction processing similar to that described above, and as a result, the reproduction image is updated.

  When the setting change task is activated, the CPU 32 gives the font data stored in the flash memory 40 to the character generator 30 in order to display the menu image. The character generator 30 creates menu image data based on the given font data, and gives the created menu image data to the LCD driver 26. As a result, the menu image shown in FIG. 8A is displayed on the LCD monitor 28.

  Here, when the item “exposure setting” is selected, the exposure mode is changed. When the item “focus setting” is selected, the focus mode is changed. The AE process and the AF process executed in response to the half-press of the shutter button 34sh under the imaging task are executed in a manner according to the exposure mode and the focus mode set in this way.

  When “change font” is selected on the menu image shown in FIG. 8A, the CPU 32 reads the alternative font data stored in the data area 2 of the flash memory 38 through the I / F 36 and is read out. The substitute font data is overwritten on the font data stored in the data area 0 of the flash memory 42. As a result, the menu image is updated from FIG. 8 (A) to FIG. 8 (B).

  When the USB communication task is activated, it is determined whether or not the USB cable CBL1 is connected to the USB device 42. In the disconnected state, a default notification is output, while in the connected state, menu data in which two items of “operation manual” and “image file” are described through the USB device 42 to a PC (not shown). Forwarded to

  If the item selected by the PC is “operation manual”, the CPU 32 reads the operation manual data stored in the data area 3 of the flash memory 38 through the I / F 36, and reads the read operation manual data as the USB device 42. To the PC. As a result, the operation manual is displayed on the screen of the PC.

  On the other hand, if the item selected by the PC is “image file”, the CPU 32 reads out the image file stored in the data area 1 of the flash memory 38 through the I / F 36, and reads the read image file into the USB device 42. To the PC. As a result, the image file is reproduced by the PC.

  The CPU 32 executes the main task shown in FIGS. 10 to 11 regardless of the operation mode, and when the camera mode is selected, the imaging task shown in FIG. 12 and the playback task shown in FIG. 13 when the playback mode is selected. When the setting change mode is selected, the setting change task shown in FIG. 14 is executed. When the USB communication mode is selected, the USB communication task shown in FIG. 15 is executed.

  Referring to FIG. 10, in step S1, initialization processing is executed. In step S3, it is determined whether or not the current operation mode is a camera mode. In step S7, it is determined whether or not the current operation mode is a playback mode. In step S17, it is determined whether or not the current operation mode is the setting change mode. In step S23, it is determined whether or not the current operation mode is the USB communication mode.

  If YES in step S3, the imaging task is activated in step S5, and if YES in step S7, the reproduction task is activated in step S9. When the process of step S5 or S9 is completed, “ADRS1”, which is the start address of slot 1, is set in the register RGST1.

  In step S13, it is repeatedly determined whether or not a mode switching operation has been performed. When the determination result is updated from NO to YES, the active task is stopped in step S15. When the stop process is completed, the process returns to step S3.

  If “YES” in the step S17, a setting change task is started in a step S19, and “ADRS2” which is the head address of the slot 2 is set in the register RGST1 in a step S21. When the process of step S21 is completed, the process proceeds to step S13.

  If “YES” in the step S23, the USB communication task is activated in a step S25. In step S27, “ADRS1”, which is the start address of slot 1, is set in register RGST1, and in step S29, “ADRS3”, which is the start address of slot 3, is set in register RGST3. When the process of step S29 is completed, the process proceeds to step S13.

  If the current operation mode is not any of the camera mode, the playback mode, the setting change mode, and the USB communication mode, another process is executed in step S31, and then the process proceeds to step S13.

  Referring to FIG. 12, in step S41, the mapping state of flash memory 38 is recognized with reference to register RGST1 set in the manner shown in FIG. As a result, the flash memory 38 is recognized as having the mapping shown in FIG.

  In step S43, a moving image capturing process is executed. As a result, a through image representing the scene is displayed on the LCD monitor 28. In step S45, it is determined whether or not the shutter button 34sh has been half-pressed, and the simple AE process in step S47 is repeated as long as the determination result is NO. As a result, the brightness of the through image is appropriately adjusted.

  When the shutter button 34sh is half-pressed, AE processing is executed in step S49, and AF processing is executed in step S51. As a result, the brightness and sharpness of the through image are strictly adjusted. In step S53, it is determined whether or not the shutter button 34sh has been fully pressed. In step S55, it is determined whether or not the operation of the shutter button 34sh has been released.

  If YES is determined in the step S55, the process returns to the step S45 as it is. If “YES” in the step S53, the recording process is executed in a step S57, and thereafter, the process returns to the step S45.

  Referring to FIG. 13, in step S61, the mapping state of flash memory 38 is recognized with reference to register RGST1 set in the manner shown in FIG. As a result, the flash memory 38 is recognized as having the mapping shown in FIG.

  In step S63, the latest image file on the data area 1 is detected with reference to the description of the directory entry 1, and the detected image file is designated as a reproduction file. In step S65, the I / F 36 and the LCD driver 26 are instructed to perform reproduction processing focusing on the designated image file.

  The I / F 36 reads the image data stored in the designated image file from the data area 1 with reference to the FAT 1, and writes the read image data to the SDRAM 24 through the memory control circuit 22. The LCD driver 26 reads the image data stored in the SDRAM 24 through the memory control circuit 22 and drives the LCD monitor 28 based on the read image data. As a result, the reproduced image is displayed on the LCD monitor 28.

  In step S67, it is determined whether or not the image advance / return button 34fr has been operated. When the determination result is updated from NO to YES, the process proceeds to step S69, and the next image file or the previous image file is designated with reference to the directory entry 1. When the designation process is completed, the process returns to step S65. As a result, another reproduced image is displayed on the LCD monitor 28.

  Referring to FIG. 14, in step S71, the mapping state of flash memory 38 is recognized with reference to register RGST1 set in the manner shown in FIG. As a result, the flash memory 38 is recognized as having the mapping shown in FIG.

  In step S73, the font data stored in the flash memory 42 is given to the character generator 30 to display the menu image. As a result, the menu image shown in FIG. 8A or 8B is displayed on the LCD monitor 28.

  In step S75, it is determined whether or not the “exposure setting” item is selected. In step S79, it is determined whether or not the “focus setting” item is selected. In step S83, the “font change” item is selected. It is determined whether or not it has been done.

  If YES in step S75, the exposure mode is changed in step S77. If YES in step S79, the focus mode is changed in step S81. When the process of step S77 or S81 is completed, the process returns to step S75.

  If “YES” in the step S83, the process proceeds to a step S85 to read the substitute font data stored in the flash memory 38 through the I / F 36. In step S87, the read alternative font data is overwritten on the font data stored in the flash memory. When the process of step S87 is completed, the process returns to step S73.

  Referring to FIG. 15, in step S91, the mapping state of flash memory 38 is recognized with reference to register RGST1 set in the manner shown in FIG. As a result, the flash memory 38 is recognized as having the mapping shown in FIG.

  In step S93, it is determined whether or not the USB cable CBL1 is connected to the USB device. If the determination result is NO, a predetermined notification is output in step S95, and then the process returns to step S93. If the determination result is YES, menu data in which two items of “operation manual” and “image file” are described is transferred to the PC through the USB device 42.

  In step S99, it is determined whether or not the item selected by the PC is “operation manual”. In step S101, it is determined whether or not the item selected by the PC is “image file”. If YES in step S99, the process proceeds to step S103, and if YES in step S101, the process proceeds to step S107.

  In step S103, the operation manual data is read from the flash memory 38 through the I / F 36, and in step S105, the read operation manual data is transferred to the PC through the USB device 42. In step S107, the image file is read from the flash memory 38 through the I / F 36, and in step S109, the read image file is transferred to the PC through the USB device 42. When the process of step S105 or S109 is completed, the process returns to step S99.

  As can be seen from the above description, the CPU 32 switches the mode between the imaging task corresponding to the camera mode, the reproduction task corresponding to the reproduction mode, the setting change task corresponding to the setting change mode, and the USB communication task corresponding to the USB communication mode. It is selectively activated in response to the operation of the switch 32sw (S3 to S5, S7 to S9, S17 to S19, S23 to S25). The flash memory 38 in which a plurality of partitions are formed is accessed by the activated task (S41, S57, S61, S65, S71, S85, S91, S103, S107). Here, the CPU 32 permits the activated task to access a part of the partitions corresponding to the selected operation mode (S11, S21, S27, S29).

  Therefore, when a certain operation mode is selected, a certain task corresponding to the selected operation mode accesses a certain partition. When another operation mode is selected, another task corresponding to the selected operation mode accesses another part of the partition. Thereby, the single flash memory 38 can be used properly depending on the operation mode.

  In this embodiment, a digital camera is assumed, but the present invention can be applied to any electronic device having a plurality of operation modes and accessing a recording medium.

  In this embodiment, the program and data are distributedly stored in the NOR type flash memory 38 and the NAND type flash memory 40. However, the program and data are collectively stored in the NAND type flash memory 40. You may make it make it.

DESCRIPTION OF SYMBOLS 10 ... Digital camera 16 ... Imager 20 ... Signal processing circuit 30 ... Character generator 32 ... CPU
38 ... NAND type flash memory 40 ... NOR type flash memory

Claims (7)

A plurality of access means respectively assigned to a plurality of operation modes for processing to access a recording medium on which a plurality of partitions are formed;
Selecting means for selecting any one of the plurality of operation modes;
An activation means for activating an access means corresponding to the operation mode selected by the selection means among the plurality of access means; and a part of the partitions corresponding to the operation mode selected by the selection means among the plurality of partitions An access control device comprising permission means for permitting access to the access means activated by the activation means. The permission means sets a part of identifiers corresponding to the operation mode selected by the selection means among a plurality of identifiers for identifying the plurality of partitions in a register,
The access control apparatus according to claim 1, wherein each of the plurality of access means executes an access process with reference to a setting state of the register. The plurality of partitions includes a first partition for storing image data;
The plurality of operation modes include an image recording / playback mode,
3. The access control apparatus according to claim 1, wherein the plurality of access means include first access means for accessing the first partition in correspondence with the image recording / reproducing mode. It further comprises playback means for playing back font data for guide display,
The plurality of partitions includes a second partition storing alternative font data;
The plurality of operation modes include a setting change mode,
4. The access control apparatus according to claim 1, wherein the plurality of access means includes second access means for accessing the second partition corresponding to the setting change mode. 5. The plurality of partitions include a third partition for storing operation manual data,
The plurality of operation modes include an external transfer mode,
5. The access control apparatus according to claim 1, wherein the plurality of access means includes third access means for accessing the third partition corresponding to the external transfer mode. In the processor of the access control device,
A plurality of access steps respectively assigned to a plurality of operation modes for processing to access a recording medium on which a plurality of partitions are formed;
A selection step of selecting any one of the plurality of operation modes;
An activation step of activating an access unit corresponding to the operation mode selected by the selection step among the plurality of access units; and a part of the partitions corresponding to the operation mode selected by the selection step among the plurality of partitions An access control program for executing an authorization step for permitting access to the access means activated by the activation step. An access control method executed by an access control device, comprising:
A plurality of access steps respectively assigned to a plurality of operation modes for processing to access a recording medium on which a plurality of partitions are formed;
A selection step of selecting any one of the plurality of operation modes;
An activation step of activating an access unit corresponding to the operation mode selected by the selection step among the plurality of access units; and a part of the partitions corresponding to the operation mode selected by the selection step among the plurality of partitions An access control method comprising a permission step of permitting access to the access means activated by the activation step.

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