JP2005346536A - Information processing system, data acquisition method for information processing system, and microcomputer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an information processing system, data acquisition method of the information processing system, and microcomputer capable of acquiring specific data stored in a storage part only when identification data are authentic. <P>SOLUTION: The information processing system has: a microcomputer which has a storage part for storing the specific data and a housing part for housing first identification data; a converter for converting the first identification data into second identification data; and an information processor having a decision part for deciding whether or not the second identification data are authentic so as to acquire the specific data. The microcomputer outputs the first identification data and the converter converts the first identification data into the second identification data. When the information processor decides that the second identification data are authentic in the decision part, it can acquire specific data so as to execute specific processing with the specified data. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an information processing system, a data acquisition method for the information processing system, and a microcomputer.

  2. Description of the Related Art In recent years, a microcomputer is incorporated in a digital camera, an audio playback device, etc. (hereinafter referred to as equipment) to control video processing, audio processing, and the like. This microcomputer has a CPU (Central Processing Unit), a storage unit (for example, mask ROM, Flash ROM), and an input / output unit (for example, I / O port). Further, the storage unit stores predetermined data for controlling the device. For example, when an instruction for video processing provided in the digital camera is input, the CPU of the microcomputer reads predetermined data for video processing stored in the storage unit. Then, the CPU of the microcomputer performs video processing by performing predetermined calculation on the video data based on the predetermined data for performing the video processing.

  By the way, the predetermined data stored in the storage unit has a defect (hereinafter referred to as a bug) in the predetermined data due to an error in creation by the creator of the predetermined data, an error in writing to the storage unit, or the like. There was a case. Therefore, the microcomputer may not be able to perform normal control on the device. In particular, when the predetermined data having a bug is control program data, it may be a serious defect for the microcomputer. Therefore, when the storage unit is configured with a non-rewritable mask ROM, it is impossible to rewrite the predetermined data even if there is a bug in the predetermined data stored in the mask ROM. Therefore, before mass production of a microcomputer having a mask ROM, predetermined data to be written to the mask ROM is first written to an EEPROM (for example, Flash ROM) that can repeatedly write and read the predetermined data, and then the predetermined data. If there is a bug, the bug was corrected and written in a mask ROM cheaper than the EEPROM. Also, in the case of a microcomputer whose storage unit is composed of an EEPROM, a bug in predetermined data stored in the EEPROM has been corrected. An emulator has been used as one of methods for correcting a bug of predetermined data stored in such an EEPROM. However, this emulator is expensive and complicated to connect.

Therefore, as another method for correcting a bug in predetermined data, a method of incorporating a debugger function in a microcomputer is performed. For example, an evaluator or the like of a device that performs inspection of the device or the like is a personal computer (Personal Computer; hereinafter referred to as application software corresponding to the debugger function) installed in a microcomputer equipped with a debugger function via a relay device. PC). Then, the evaluator or the like of the device activates the application software by using the PC and instructs a predetermined command for reading predetermined data to the microcomputer. The microcomputer that has received the predetermined command transmits the predetermined data stored in the storage unit to the PC. Then, the evaluator or the like of the device checks whether or not there is a bug in the predetermined data. If there is a bug in the predetermined data, the evaluator of the device or the like instructs the microcomputer to perform a debugging process using the debugger function for the bug in the predetermined data. The microcomputer that has received the instruction performs a debugging process using a debugger function and corrects a bug in predetermined data.
JP 2004-38464 A

  However, in the microcomputer in which the debugger function described above is incorporated, a third party who is not an evaluator of the device connects the relay device and the PC to the microcomputer in which the debugger function is incorporated as described above. If a predetermined command for reading predetermined data is designated by an application corresponding to the above, the predetermined data can be easily read. This predetermined data is often unique to companies that manufacture equipment. However, there is a possibility that a third party who is not an evaluator of the device easily reads out the predetermined data, and modifies and abuses the predetermined data. In addition, the predetermined data may be imitated by other companies.

  Therefore, the present invention provides an information processing system that can acquire predetermined data stored in a storage unit only when identification data for reading the predetermined data stored in the storage unit is valid. An object of the present invention is to provide a data acquisition method for an information processing system and a microcomputer.

  The invention for solving the above-described problems includes a microcomputer having a storage unit storing predetermined data and a storage unit storing first identification data, and the first identification from the microcomputer. A conversion device that converts data into second identification data, and whether or not the second identification data from the conversion device is valid in order to obtain the predetermined data stored in the storage unit And the microcomputer outputs the first identification data stored in the storage unit to the conversion device based on an instruction from the information processing device. The conversion device converts the first identification data into the second identification data and outputs the second identification data to the information processing device, and the information processing device is configured to output the second identification data by the determination unit. Whether the second identification data is valid or not, based on the determination result of the determination unit when the second identification data is valid, the predetermined data stored in the storage unit The predetermined data can be acquired in order to execute processing.

  Furthermore, in order to obtain predetermined data, an information processing device that outputs first identification data, a conversion device that converts the first identification data from the information processing device into second identification data, and the predetermined data And a microcomputer having a storage unit that stores data and a determination unit that determines whether or not the second identification data from the conversion device is valid, the information processing device includes: The first identification data is output to the conversion device, the conversion device converts the first identification data into the second identification data and outputs the second identification data to the microcomputer, and the microcomputer performs the determination. The information processing apparatus determines whether the second identification data is valid or not, and the information processing apparatus determines whether the second identification data is valid based on a determination result of the determination unit when the second identification data is valid. In order to perform the predetermined processing with respect to said predetermined data stored in the part, it is possible to acquire the predetermined data, characterized in that.

  A microcomputer having a storage unit in which predetermined data is stored; and an information processing apparatus for acquiring the predetermined data to execute predetermined processing on the predetermined data stored in the storage unit; A data acquisition method in an information processing system having a relay device that relays data between the microcomputer and the information processing device, wherein the microcomputer is based on an instruction from the information processing device, The first identification data is output to the relay device, the relay device converts the first identification data into second identification data and outputs the second identification data to the information processing device, and the information processing device Whether the second identification data is valid, and based on the determination result when the second identification data is valid, the predetermined data stored in the storage unit In order to execute the predetermined processing on the data, it is possible to acquire the predetermined data, characterized in that.

  A microcomputer having a storage unit storing predetermined data; and an information processing apparatus for acquiring the predetermined data to execute predetermined processing on the predetermined data stored in the storage unit; A data acquisition method in an information processing system having a relay device that relays data between the microcomputer and the information processing device, wherein the information processing device sends first identification data to the relay device The relay device converts the first identification data into second identification data and outputs the second identification data to the microcomputer. The microcomputer determines whether or not the second identification data is valid. The information processing apparatus determines the predetermined data stored in the storage unit based on the determination result when the second identification data is valid. In order to the predetermined processing and, it is possible to acquire the predetermined data, characterized in that.

  Further, in a microcomputer that has a storage unit that stores predetermined data and executes predetermined processing on the predetermined data based on an instruction from the external device, the external device is stored in the storage unit. In order to obtain the predetermined data, the second identification data obtained by converting the first identification data of the external device is input, and it is determined whether or not the second identification data is valid. A determination unit configured to perform the predetermined process on the predetermined data by the external device based on a determination result of the determination unit when the second identification data is valid. The predetermined data can be output to an external device.

  Further, in a microcomputer that has a storage unit that stores predetermined data and executes predetermined processing on the predetermined data based on an instruction from the external device, the external device is stored in the storage unit. In addition, in order to obtain the predetermined data, a conversion unit that converts the first identification data of the external device into second identification data, and determination that determines whether the second identification data is valid And the predetermined processing performed on the predetermined data by the external device based on a determination result of the determination unit when the second identification data is valid. The predetermined data can be output to an external device.

  According to the present invention, it is possible to acquire predetermined data stored in the storage unit of the microcomputer only when the identification data is valid, the information processing system, the data acquisition method of the information processing system, the micro A computer can be provided.

  At least the following matters will become apparent from the description of this specification and the accompanying drawings.

<< First Embodiment >>
=== Example of Overall Configuration of Information Processing System ===
An information processing system according to the present invention will be described with reference to FIG. FIG. 1 is a functional block diagram showing an example of the overall configuration of an information processing system according to the present invention.

  The information processing system includes a microcomputer 1, a conversion device 2, and an information processing device 3. Data transmission / reception is performed between the information processing apparatus 3 and the conversion apparatus 2 using a first communication protocol via, for example, a USB 8 (Universal Serial Bus) which is a general-purpose data transmission path. Data is transmitted and received between the microcomputer 1 and the conversion device 2 via the debugger interface 7 using a second communication protocol that is a communication protocol different from the first communication protocol. The second communication protocol is a unique communication protocol for transmitting and receiving data between the microcomputer 1 and the conversion device 2. The debugger interface 7 is a data transmission path for transmitting and receiving data using a second communication protocol that is a specific communication protocol. That is, data transmission / reception between the microcomputer 1 and the conversion device 2 is provided so that data cannot be transmitted / received by a general-purpose data transmission path such as USB. Therefore, data transmission / reception between the microcomputer 1 and the conversion device 2 has high security. Furthermore, in the present embodiment, as described above, transmission / reception of data between the information processing device 3 and the conversion device 2 is provided so that communication can be performed via a general-purpose data transmission path. This is because the information processing system according to the present invention can be applied to, for example, a PC in which the information processing apparatus 3 is a general-purpose information processing apparatus.

  The microcomputer 1 includes a CPU 4, an EEPROM 5 (for example, FlashROM), and a debugger unit 6. Further, the EEPROM 5 has a password area portion 9 (storage portion) and a program area portion 10 (storage portion). The program area unit 10 stores data (predetermined data) for controlling a device (not shown) by the microcomputer 1, for example, program data. The CPU 4 includes an address counter (not shown) that specifies the address of the EEPROM 5, a program logic array (not shown) that decodes program data read from the program area unit 10, an arithmetic logic unit (not shown) that performs logical operations, and arithmetic data. Has a register (not shown) or the like for temporarily storing. The password area unit 9 stores a password V (first identification data) for determining whether or not the information processing apparatus 3 is allowed to read the program data stored in the program area unit 10. The debugger unit 6 is provided with a debugger function for performing debug processing for correcting bugs in the program data stored in the program area unit 10.

  The conversion device 2 includes a conversion device control unit 11. The conversion device control unit 11 includes a signal conversion unit 12 and a password conversion unit 13. The signal conversion unit 12 converts data corresponding to the second communication protocol from the microcomputer 1 into data corresponding to the first communication protocol, and outputs the data to the information processing apparatus 3 via the USB 8. Further, the signal conversion unit 12 converts data corresponding to the first communication protocol from the information processing device 3 into data corresponding to the second communication protocol, and outputs the data to the microcomputer 1 via the debugger interface 7. . The password conversion unit 13 converts the password V stored in the password area unit 9 of the microcomputer 1 into a password W (second identification data) and outputs the password W to the information processing device 3.

  The information processing apparatus 3 includes a determination unit 14 (determination unit), an input unit 15 (input unit), a monitor 17, and a storage unit 19. The storage unit 19 stores a debugger application program for executing a debugger function incorporated in the debugger unit 6 of the microcomputer 1. The input unit 15 receives a password. The determination unit 14 determines whether or not the password W and the password input by the input unit 15 have a predetermined relationship (for example, whether or not they match). When the determination unit 14 determines that the password W and the password input to the input unit 15 match, the information processing device 3 reads the program data stored in the program area unit 10 of the microcomputer 1. Read signal I is transmitted to converter 2. Further, when the determination unit 14 determines that the password W and the password input to the input unit 15 do not match, the information processing apparatus 3 displays on the monitor 17 that the password input to the input unit 15 is not valid. Exit the debugger application program.

=== Operation of Information Processing System ===
The operation of the information processing system according to the present invention will be described with reference to FIG. 1, FIG. 3, and FIG. FIG. 3 is a flowchart showing an example of the operation of the information processing system according to the present invention. FIG. 5 is an example of a monitor display (for example, a password input instruction, a password mismatch display, and a password change instruction) used in the information processing system according to the present invention.

  First, when an instruction for starting a debugger application program stored in the storage unit 19 is input to the input unit 15, the information processing apparatus 3 starts the debugger application program (FIG. 3, S1). . Then, the information processing apparatus 3 transmits a password input instruction display signal to the monitor 17 as a result of the activation of the debugger application. The monitor 17 displays a screen for instructing to input a password based on the password input instruction display signal (FIG. 3, S2, FIG. 5 (a)). Next, the information processing device 3 outputs the password read signal A to the conversion device 2 (FIG. 3, S3).

The signal conversion unit 12 of the conversion device 2 converts the password read signal A corresponding to the first communication protocol into a password read signal B corresponding to the second communication protocol, and outputs it to the microcomputer 1 (FIG. 3, FIG. 3). S4).
The microcomputer 1 outputs the password V stored in the password area unit 9 to the conversion device 2 based on the password read signal B (FIG. 3, S5).
The password conversion unit 13 of the conversion device 2 converts the password V into the password W and outputs it to the information processing device 3 (S6 in FIG. 3).

  The determination unit 14 of the information processing apparatus 3 determines whether or not the password W and the password input to the input unit 15 match (FIG. 3, S7). When the determination unit 14 determines that the password W and the password input to the input unit 15 match (FIG. 3, S8 · YES), the information processing apparatus 3 is stored in the program area unit 10 of the microcomputer 1. In order to read out the program data, the program data read signal I is output to the converter 2 (S9 in FIG. 3). When the determination unit determines that the password W and the password input to the input unit 15 do not match (FIG. 3, S8 / NO), the information processing apparatus 3 determines that the password input to the input unit 15 is valid. Is displayed on the monitor 17 (FIG. 3, S18, FIG. 5B), and the debugger application program is terminated.

The signal converter 12 of the conversion device 2 converts the program data read signal I corresponding to the first communication protocol into a program data read signal J corresponding to the second communication protocol, and outputs it to the microcomputer 1 (FIG. 3, S10).
The microcomputer 1 outputs the program data stored in the program area unit 10 to the conversion device 2 based on the program data read signal J (S11 in FIG. 3).
The signal conversion unit 12 of the conversion device 2 converts program data corresponding to the second communication protocol into program data corresponding to the first communication protocol, and outputs the program data to the information processing device 3 (S12 in FIG. 3).

  The information processing device 3 displays the program data from the conversion device 2 on the monitor 17 in the form of source code that can be viewed by the evaluator of the device, for example (FIG. 3, S13). The evaluator of the device checks whether or not there is a bug in the program data based on the program data in the form of source code displayed on the monitor 17. When the device evaluator finds a bug in the program data in the form of the source code, the device evaluator inputs a debug instruction command to execute the debugging process by the debugger function provided in the debugger unit 6 of the microcomputer 1. 15 The information processing device 3 outputs a debug instruction signal to the microcomputer 1 via the conversion device 2 based on the debug instruction command (S19 in FIG. 3). The debugger unit 6 of the microcomputer 1 performs a debugging process on a bug in the program data based on the debug instruction signal input via the conversion device 2.

  Next, for example, when a password change instruction command is input to the input unit 15 (FIG. 3, S14 / YES), the information processing apparatus 3 displays an instruction to input a new password on the monitor 17 (FIG. 3, S15, Fig. 5 (c)). When the new password X is input to the input unit 15, the information processing device 3 outputs the new password X to the conversion device 2.

The password conversion unit 13 of the conversion device 2 converts the new password X into the password Y and outputs it to the microcomputer 1 (S16 in FIG. 3).
The microcomputer 1 changes the password V stored in the password area 9 to the password Y (FIG. 3, S17).

  In the present embodiment, the information processing device 3 is provided with the input unit 15, and the determination unit 14 includes the password input to the input unit 15 and the password W input from the microcomputer 1 via the conversion device 2. However, the present invention is not limited to this. For example, the information processing device 3 may be provided with a holding unit (not shown) (holding unit) that holds a predetermined password. In this case, when the debugger application program is activated as described above, the information processing device 3 outputs the password read signal A to the conversion device 2 as a result of the activation of the debugger application program. Based on the password read signal A, the determination unit 14 determines whether or not the password W input from the microcomputer 1 via the conversion device 2 matches the predetermined password held in the holding unit. . Further, the predetermined password held in the holding unit may be the same as the password W, or a plurality of passwords having a predetermined relationship with the password W may be provided. In that case, for example, the information processing apparatus 3 may periodically change the password to enhance the security of the password held in the holding unit.

  According to the present embodiment, the information processing apparatus 3 stores the information in the program area unit 10 of the microcomputer 1 only when the determination unit 14 of the information processing apparatus 3 determines that the password V from the microcomputer 1 is valid. The read program data can be read out. Further, the password conversion unit 13 of the conversion device 2 converts the password V stored in the password area unit 9 of the microcomputer 1 into the password W, and the password W determines whether the determination unit 14 is valid. Therefore, it is possible to prevent the program data from being read by a third party who does not have the conversion device 2.

  Further, according to the present embodiment, the determination unit 14 of the information processing device 3 can determine whether the password V from the microcomputer 1 is valid based on the password input to the input unit 15. Become. Therefore, even if a third party who does not know the password for determining that the password V is valid by the determination unit 14 inputs a password different from the password to the input unit 15, it is stored in the program area unit 10 of the microcomputer 1. It is possible to prevent the read program data from being read.

  Further, according to the present embodiment, the determination unit 14 of the information processing device 3 has a predetermined relationship between the password input to the input unit 15 and the password W input from the microcomputer 1 via the conversion device 2. It is possible to determine that it is valid when

  Further, according to the present embodiment, the determination unit 14 of the information processing device 3 is valid when the password input to the input unit 15 matches the password W input from the microcomputer 1 via the conversion device 2. It is possible to determine that it is. Therefore, it is possible to prevent the program data stored in the program area unit 10 of the microcomputer 1 from being read by a third party who does not know the password that matches the password W to be input to the input unit 15. In addition, the password input to the input unit 15 by the determination unit 14 and the password W can be easily compared.

  Further, according to the present embodiment, the determination unit 14 of the information processing device 3 can determine whether the password W from the microcomputer 1 is valid based on the password held in the holding unit. . Therefore, the program stored in the program area unit 10 of the microcomputer 1 by the information processing apparatus 3 provided with the holding unit that does not hold the password necessary for the determination unit 14 to determine that the password W is valid. It is possible to prevent data from being read. Further, as described above, the trouble of inputting the password to the input unit 15 is eliminated. Further, as a result of the debugger application program being activated, the information processing device 3 can read the password W from the microcomputer 1 via the conversion device 2, and the determination unit 14 determines whether the password W is valid. Processing for determination can be performed quickly.

  Further, according to the present embodiment, the determination unit 14 of the information processing device 3 determines that the password held in the holding unit and the password W from the microcomputer 1 are valid when they have a predetermined relationship. It becomes possible to do. Accordingly, the password and password W held in the holding unit can define a relationship for determining that the determination unit 14 is valid.

  Further, according to the present embodiment, the determination unit 14 of the information processing device 3 can determine that the password is valid when the password held in the holding unit matches the password from the microcomputer 1. Therefore, it is possible to prevent the program data stored in the program area unit 10 of the microcomputer 1 from being read out by the information processing apparatus 3 provided with the holding unit that does not hold the password that should match the password W. It becomes.

  Further, according to the present embodiment, the information processing device 3 can change the password V stored in the password area unit 9 of the microcomputer 1 to the password Y. Therefore, even if a third party knows the password V stored in the password area 9, the password V can be changed, and the program data stored in the program area 10 of the microcomputer 1 can be read out. Can be prevented.

  Further, according to the present embodiment, the signal conversion unit 12 of the conversion device 2 converts the data corresponding to the first communication protocol from the information processing device 3 into data corresponding to the second communication protocol, and the microcomputer. 1, data corresponding to the second communication protocol from the microcomputer 1 can be converted into data corresponding to the first communication protocol and output to the information processing apparatus 3. Therefore, it is possible to prevent the program data stored in the program area unit 10 of the microcomputer 1 from being read by a third party who does not have the conversion device 2 using the information processing device 3.

  Furthermore, according to the present embodiment, when there is a bug in the program data stored in the program area unit 10 of the microcomputer 1, the program is executed by executing the debugging process by the debugger function provided in the debugger unit 6. Data bugs can be fixed.

<< Second Embodiment >>
=== Overall Configuration of Information Processing System ===
An information processing system according to the present invention will be described with reference to FIG. FIG. 2 is a functional block diagram showing an example of the overall configuration of the information processing system according to the present invention.

  The information processing system includes a microcomputer 21, a conversion device 22, and an information processing device 23. The information processing device 23 and the conversion device 22 transmit and receive data using the first communication protocol via, for example, the USB 28 that is a general-purpose data transmission path. The microcomputer 21 and the conversion device 22 transmit and receive data via the debugger interface 27 using a second communication protocol different from the first communication protocol. Note that the first communication protocol, the second communication protocol, and the debugger interface 27 described above are assumed to be the same as those described in the first embodiment.

  The microcomputer 21 includes a CPU 24, an EEPROM 25, a determination unit 34, a holding unit 36, and a debugger unit 26. Further, the EEPROM 25 has a password area 29 (storage section) and a program area section 30 (storage section). The program area unit 30 stores data (predetermined data) for controlling a device (not shown) by the microcomputer 21, for example, program data. The CPU 24 includes an address counter (not shown) that specifies the address of the EEPROM 25, a program logic array (not shown) that decodes program data read from the program area 30, an arithmetic logic unit (not shown) that performs logical operations, and arithmetic data Has a register (not shown). The password area 29 stores a password Z for determining whether or not to output the program data stored in the program area 30 to the information processing apparatus 23 via the conversion apparatus 22. The holding unit 36 holds the password C (second identification data) from the conversion device 22. The determination unit 34 determines whether or not the password Z stored in the password area unit 29 and the password C from the conversion device 22 stored in the storage unit 36 have a predetermined relationship (for example, whether or not they match). ). When the determination unit 34 determines that the password Z and the password C match, the microcomputer 21 reads the program data stored in the program area unit 30 and outputs it to the conversion device 22. Furthermore, when the determination unit 34 determines that the password Z and the password C do not match, the microcomputer 21 sends a password mismatch display instruction signal to the conversion device 22 for displaying that the password is not valid on the information processing device 23. The output of the program data stored in the program area unit 30 is prohibited. The debugger unit 26 is provided with a debugger function for performing debug processing for correcting bugs in the program data stored in the program area unit 30.

  The conversion device 22 includes a conversion device control unit 31. The conversion device control unit 31 includes a signal conversion unit 32 and a password conversion unit 33. The signal conversion unit 32 converts data corresponding to the second communication protocol from the microcomputer 21 into data corresponding to the first communication protocol, and outputs the data to the information processing apparatus 23 via the USB 28. The signal conversion unit 32 converts data corresponding to the first communication protocol from the information processing device 23 into data corresponding to the second communication protocol, and outputs the data to the microcomputer 21 via the debugger interface 27. . The password conversion unit 33 converts the password (first identification data) input to the input unit 35 of the information processing device 23 into a password C and outputs the password C to the microcomputer 21.

  The information processing apparatus 23 includes an input unit 35 (input unit), a monitor 37, and a storage unit 39. The storage unit 39 stores a debugger application program for executing a debugger function incorporated in the debugger unit 26 of the microcomputer 21. The input unit 35 receives a password.

=== Operation of Information Processing System ===
The operation of the information processing system according to the present invention will be described with reference to FIGS. FIG. 4 is a flowchart showing an example of the operation of the information processing system according to the present invention.

  First, when an instruction for starting a debugger application program stored in the storage unit 39 is input to the input unit 35, the information processing apparatus starts the debugger application program (FIG. 4, S101). Then, the information processing apparatus 23 transmits a password input instruction display signal to the monitor 37 as a result of the activation of the debugger application program. The monitor 37 displays a screen for instructing to input a password based on the password input instruction display signal (FIG. 3, S102). Then, the information processing device 23 outputs the password input by the input unit 35 to the conversion device 22.

  The password conversion unit 33 of the conversion device 22 converts the password from the information processing device 23 into the password C and outputs it to the microcomputer 21 (FIG. 4, S103).

  The holding unit 36 of the microcomputer 21 holds the password C (FIG. 4, S104). The determination unit 34 determines whether or not the password Z and the password C stored in the password area unit 29 match (FIG. 4, S105). When the determination unit 34 determines that the password Z and the password C match (FIG. 4, S106 YES), the microcomputer 21 reads the program data stored in the program area unit 30 and outputs it to the conversion device 22. (FIG. 4, S107).

  The signal conversion unit 32 of the conversion device 22 converts the program data corresponding to the second communication protocol into program data corresponding to the first communication protocol, and outputs the program data to the information processing device 23 (S108 in FIG. 4).

  The information processing device 23 displays the program data from the conversion device 22 on the monitor 37 in the form of source code that can be viewed by the evaluator of the device, for example (FIG. 4, S109). The evaluator of the device confirms whether there is a bug in the program data based on the program data in the form of the source code displayed on the monitor 37. When the device evaluator finds a bug in the program data in the form of the source code, the device evaluator inputs the debug instruction command to execute the debugging process by the debugger function provided in the debugger unit 26 of the microcomputer 21. 35. Based on the debug instruction command, the information processing device 23 outputs a debug instruction signal to the microcomputer 21 via the conversion device 22 (FIG. 4, S117). The debugger unit 26 of the microcomputer 21 performs a debugging process on a bug in the program data based on the debug instruction signal input via the conversion device.

When the determination unit 34 of the microcomputer 21 determines that the password C and the password Z do not match (FIG. 4, S106, NO), the microcomputer 21 displays on the information processing apparatus 23 that the password is not valid. The password mismatch display instruction signal G for causing the password to be generated is output to the converter 22 (FIG. 4, S110).
The signal converter 32 of the conversion device 22 converts the password mismatch display instruction signal G corresponding to the second communication protocol into a password mismatch display instruction signal H corresponding to the first communication protocol, and outputs it to the information processing device 23. (FIG. 4, S111).
Based on the password mismatch display instruction signal H, the information processing apparatus 23 displays on the monitor 37 that the password input to the input unit 35 is not valid (FIG. 4, S112), and ends the debugger application program.

  Next, for example, when a password change instruction command is input to the input unit 35 (FIG. 4, S113: YES), the information processing apparatus 23 instructs the monitor 37 to input a new password (FIG. 4, S114). When the new password S is input to the input unit 35, the information processing device 23 outputs the new password S to the conversion device 22.

The password conversion unit 33 of the conversion device 22 converts the new password S into the password T and outputs it to the microcomputer 21 (S115 in FIG. 4).
The microcomputer 21 changes the password Z stored in the password area 29 to the password T (FIG. 4, S116).

  In the present embodiment, the information processing apparatus 23 includes an input unit 35, and the determination unit 34 of the microcomputer 21 is input to the input unit 35 and input via the conversion device 22. Z is discriminated, but the present invention is not limited to this. For example, the information processing device 23 may be provided with a storage unit (not shown) (holding unit) in which a predetermined password is stored. In this case, when the debugger application program is activated as described above, the information processing device 23 uses the conversion device 22 to transfer a predetermined password stored in the storage unit as a result of the activation of the debugger application program. Output to the computer 21. Then, the determination unit 34 of the microcomputer 21 may determine whether or not the predetermined password input via the conversion device 22 matches the password Z. Further, the predetermined password stored in the storage unit may be a password that becomes the password C via the conversion device 22, or a plurality of passwords that have a predetermined relationship with the password C may be provided. In this case, for example, the information processing apparatus 23 may periodically change the password to increase the security of the password stored in the storage unit.

  According to the present embodiment, the information processing apparatus 23 stores the program area unit 30 of the microcomputer 21 only when the determination unit 34 of the microcomputer 21 determines that the password C from the information processing apparatus 23 is valid. The read program data can be read out. In addition, the password conversion unit 33 of the conversion device 22 converts the password from the information processing device 23 into the password C, and determines whether the determination unit 34 is legitimate by the password C. It is possible to prevent the program data from being read by a third party who has not done so.

  Further, according to the present embodiment, the determination unit 34 of the microcomputer 21 can determine whether or not the password C from the information processing apparatus 23 is valid based on the password Z stored in the password area unit 29. It becomes possible. Therefore, it is possible to prevent the program data stored in the program area unit 30 of the microcomputer 21 from being read out by the information processing apparatus 23 that outputs a password that the determination unit 34 does not determine as valid.

  Further, according to the present embodiment, the determination unit 34 of the microcomputer 21 determines in advance the password C input from the information processing device 23 via the conversion device 22 and the password Z stored in the password area unit 29. It is possible to determine that the relationship is valid when the relationship is correct.

  According to the present embodiment, the determination unit 34 of the microcomputer 21 matches the password C input from the information processing device 23 via the conversion device 22 and the password Z stored in the password area unit 29. It is possible to determine that it is valid. Therefore, it is possible to prevent the program data stored in the program area unit 30 of the microcomputer 21 from being read out by the information processing apparatus 23 that outputs a password that is not determined when the determination unit 34 matches the password Z. Further, the comparison between the password C and the password Z by the determination unit 34 is facilitated.

  Further, according to the present embodiment, the determination unit 34 of the microcomputer 21 has the password C input through the conversion device 22 as the password stored in the storage unit and the password Z stored in the password area unit 29. When they match, it can be determined to be valid. Therefore, it is possible to prevent the program data stored in the program area unit 30 of the microcomputer 21 from being read by the information processing apparatus 23 provided with a storage unit in which a password that should match the password Z is not stored. It becomes. Further, as described above, there is no need to bother entering a password into the input unit 35. Further, as a result of the debugger application program being activated, the information processing device 23 can output the password stored in the storage unit to the microcomputer 21 via the conversion device 22, and the determination unit 34 of the microcomputer 21 can The process for determining whether or not the password C and the password Z match can be quickly performed.

  Further, according to the present embodiment, the determination unit 34 of the microcomputer 21 includes the password C input through the conversion device 22 with the password input into the input unit 35 and the password Z stored in the password area unit 29. It is possible to determine that the two are valid. Therefore, it is possible to prevent the program data stored in the program area 30 of the microcomputer 21 from being read by a third party who does not know the password that matches the password Z to be input to the input unit 35.

  Further, according to the present embodiment, the information processing apparatus 23 can change the password Z stored in the password area 29 of the microcomputer 21 to the password T. Therefore, even if a third party knows the password Z stored in the password area 29, the password T can be changed, and the program data stored in the program area 30 of the microcomputer 21 can be read out. Can be prevented.

  Further, according to the present embodiment, the signal conversion unit 32 of the conversion device 22 converts the data corresponding to the first communication protocol from the information processing device 23 into data corresponding to the second communication protocol, and the microcomputer. The data corresponding to the second communication protocol from the microcomputer 21 can be converted into data corresponding to the first communication protocol and output to the information processing apparatus 23. Therefore, it becomes possible to prevent the program data stored in the program area unit 30 of the microcomputer 21 from being read by a third party who does not have the conversion device 22 using the information processing device 23.

  Furthermore, according to the present embodiment, when there is a bug in the program data stored in the program area unit 30 of the microcomputer 21, the program is executed by executing a debugging process using the debugger function provided in the debugger unit 26. Data bugs can be fixed.

<< Third Embodiment >>
=== Overall Configuration of Microcomputer ===
The microcomputer according to the present invention will be described with reference to FIG. FIG. 6 is a functional block diagram showing an example of the configuration of the microcomputer according to the present invention. Note that the microcomputer 41 described in the present embodiment is a microcomputer that replaces the above-described FIG. 2, the conversion device 22 of the information processing system, and the microcomputer 21.

  The microcomputer 41 includes a CPU 44, an EEPROM 45, a determination unit 54, a holding unit 56, a debugger unit 46, and a conversion unit 40. Further, the EEPROM 45 has a password area 49 and a program area 50 (storage section). Note that the functions of the components other than the conversion unit 40 constituting the microcomputer 41 are the same as the functions of the components of the microcomputer 21 in the second embodiment.

  The conversion unit 40 converts, for example, data corresponding to a first communication protocol from a PC (external device) (not shown) into a second communication protocol that is a communication protocol different from the first communication protocol. Further, the conversion unit 40 converts the password M (first identification data) for reading the program data (predetermined data) stored in the program area unit 50 output from the PC into the password N (second identification data). Convert to

=== Operation of microcomputer ===
The operation of the microcomputer according to the present invention will be described with reference to FIG.

  First, when the password M for reading the program data stored in the program area unit 50 is output from the PC, the conversion unit 40 of the microcomputer 41 converts the password M output from the PC into the password N. The holding unit 56 holds the password N via the debugger unit 46. The determination unit 54 determines whether or not the password stored in the password area unit 49, for example, the password L and the password N match. When the determination unit 54 determines that the password L and the password N match, the microcomputer 41 reads the program data stored in the program area unit 50 and transmits the program data to the conversion unit 40. When the determination unit 54 determines that the password L and the password N do not match, the microcomputer 41 transmits a signal for displaying, for example, that the password is not valid on a PC monitor (not shown) to the PC. Thus, reading of the program data stored in the program area unit 50 is prohibited. The conversion unit 40 converts program data corresponding to the second communication protocol into program data corresponding to the first communication protocol, and outputs the program data to the PC.

  Further, the PC displays the program data from the microcomputer 41 on the monitor in the form of source code that can be viewed by the evaluator of the device, for example. The evaluator of the device checks whether or not there is a bug in the program data based on the program data in the form of the source code displayed on the monitor. When the device evaluator finds a bug in the program data in the form of the source code, the device evaluator inputs a debug instruction command to execute debug processing by the debugger function provided in the debugger unit 46 of the microcomputer 41. Input (not shown). The PC outputs a debug instruction signal to the microcomputer 41 based on the debug instruction command.

  The conversion unit 40 of the microcomputer 41 converts the debug instruction signal corresponding to the first communication protocol into the debug instruction signal corresponding to the second communication protocol. The debugger unit 26 performs a debugging process on a bug in the program data stored in the program area unit 50 based on a debug instruction signal corresponding to the second communication protocol.

  According to the present embodiment, the program data stored in the program area unit 50 can be read only when the determination unit 54 of the microcomputer 41 determines that the password M from the PC is valid. Further, the conversion unit 40 can convert the password M from the PC into the password N, and can determine whether or not the determination unit 54 is legitimate by the password N.

=== Other Embodiments ===
As described above, in the information processing system, the data acquisition method of the information processing system, and the microcomputer according to the present invention, the acquisition of the program data stored in the program area unit has been described. The present invention is not intended to limit the present invention. The present invention can be changed and improved without departing from the gist thereof.

<< Change password >>
In this embodiment, when a password change instruction command is input to the input unit of the information processing apparatus, the password stored in the password area unit of the microcomputer is changed. However, the present invention is not limited to this. For example, a timer is provided in the microcomputer or the information processing apparatus, the time when the password is to be changed is set in advance in the timer, and when the timer is determined to be the set time, the password is stored in the password area portion of the microcomputer The microcomputer may perform a password change process to change the password.

<< Conversion Device Form >>
In this embodiment, the conversion device is provided with a signal conversion unit, converts data corresponding to the second communication protocol from the microcomputer into data corresponding to the first communication protocol, and outputs the data to the information processing device. The data corresponding to the first communication protocol from the information processing apparatus is converted into data corresponding to the second communication protocol and output to the microcomputer. However, the present invention is not limited to this. The conversion device may not be provided with a signal conversion unit, and the first communication protocol and the second communication protocol may be the same communication protocol, and data may be transmitted and received between the microcomputer and the information processing device without using the conversion device. .

It is a functional block diagram which shows an example of the whole structure of the information processing system which concerns on this invention. It is a functional block diagram which shows an example of the whole structure of the information processing system which concerns on this invention. It is a flowchart which shows an example of operation | movement of the information processing system which concerns on this invention. It is a flowchart which shows an example of operation | movement of the information processing system which concerns on this invention. It is an example of display (for example, password input instruction, password mismatch display, password change instruction) of the information processing apparatus used in the information processing system according to the present invention. It is a functional block diagram which shows an example of a structure of the microcomputer based on this invention.

Explanation of symbols

1, 21, 41 Microcomputer 2, 22 Conversion device 3, 23 Information processing device 4, 24, 44 CPU
5, 25, 45 FlashROM
6, 26, 46 Debugger part 7, 27 Debugger interface 8, 28 USB
9, 29, 49 Password area part 10, 30, 50 Program area part 11, 31 Conversion device control part 12, 32 Signal conversion part 13, 33 Password conversion part 14, 34, 54 Discrimination part 15, 35 Input part 17, 37 Monitor 19, 39 Storage unit 36, 56 Holding unit 40 Conversion unit

Claims (23)

A microcomputer having a storage unit storing predetermined data and a storage unit storing first identification data;
A conversion device for converting the first identification data from the microcomputer into second identification data;
An information processing device having a determination unit for determining whether or not the second identification data from the conversion device is valid in order to obtain the predetermined data stored in the storage unit;
The microcomputer outputs the first identification data stored in the storage unit to the conversion device based on an instruction from the information processing device,
The conversion device converts the first identification data into the second identification data and outputs the second identification data to the information processing device,
The information processing apparatus determines whether or not the second identification data is valid by the determination unit, and based on the determination result of the determination unit when the second identification data is valid, The predetermined data can be acquired in order to execute predetermined processing on the predetermined data stored in the storage unit.
An information processing system characterized by this. The information processing apparatus has an input unit to which data for determining whether or not the second identification data is valid is input;
The determination unit determines whether the second identification data is valid based on the data input to the input unit,
The information processing apparatus should execute the predetermined process on the predetermined data stored in the storage unit based on a determination result of the determination unit when the second identification data is valid. , It becomes possible to obtain the predetermined data,
The information processing system according to claim 1. The determination unit determines that the data and the second identification data are valid when the data has a predetermined relationship.
The information processing system according to claim 2. The determination unit determines that the data is valid when the data and the second identification data match.
The information processing system according to claim 3. The information processing apparatus includes a holding unit in which data for determining whether or not the second identification data is valid is held in advance.
The determination unit determines whether or not the second identification data is valid based on the data held in the holding unit,
The information processing apparatus applies the predetermined data stored in the storage unit based on the determination result of the determination unit when the second identification data held in the holding unit is valid. In order to execute the predetermined process, the predetermined data can be acquired.
The information processing system according to claim 1. The determination unit determines that the data and the second identification data are valid when the data has a predetermined relationship.
The information processing system according to claim 5. The determination unit determines that the data is valid when the data and the second identification data match.
The information processing system according to claim 6. The information processing device generates a change signal to change the first identification data stored in the storage unit to identification data different from the first identification data,
The microcomputer can change the first identification data stored in the storage unit to identification data different from the first identification data, based on the change signal from the information processing apparatus.
The information processing system according to any one of claims 1 to 7. The first communication protocol between the information processing device and the conversion device and the second communication protocol between the microcomputer and the conversion device are different communication protocols,
The conversion device converts the data corresponding to the first communication protocol output from the information processing device into data corresponding to the second communication protocol, and the second communication output from the microcomputer Converting data corresponding to the protocol into data corresponding to the first communication protocol;
The information processing system according to claim 1, wherein the information processing system is configured as described above. The microcomputer has a debugger unit for executing a debugging process on the predetermined data stored in the storage unit based on an instruction from the information processing apparatus,
The information processing apparatus can acquire the predetermined data in order to execute the debugging process by the debugger unit on the predetermined data.
The information processing system according to claim 1, wherein the information processing system is an information processing system. An information processing apparatus that outputs first identification data to obtain predetermined data;
A conversion device that converts the first identification data from the information processing device into second identification data;
A microcomputer having a storage unit in which the predetermined data is stored, and a determination unit that determines whether the second identification data from the conversion device is valid;
The information processing device outputs the first identification data to the conversion device,
The converter converts the first identification data into the second identification data and outputs the second identification data to the microcomputer;
The microcomputer determines whether the second identification data is valid by the determination unit,
The information processing apparatus performs a predetermined process on the predetermined data stored in the storage unit based on a determination result of the determination unit when the second identification data is valid. The predetermined data can be acquired.
An information processing system characterized by this. The microcomputer has a storage unit in which data for determining whether or not the second identification data is valid is stored in advance.
The determination unit determines whether the second identification data is valid based on the data stored in the storage unit,
The information processing apparatus applies the predetermined data stored in the storage unit based on the determination result of the determination unit when the second identification data stored in the storage unit is valid. In order to execute the predetermined process, the predetermined data can be acquired.
The information processing system according to claim 11. The determination unit determines that the data and the second identification data are valid when the data has a predetermined relationship.
The information processing system according to claim 12. The determination unit determines that the data is valid when the data and the second identification data match.
The information processing system according to claim 13. The information processing apparatus includes a holding unit in which data for determining whether or not the second identification data is valid by the determining unit is held in advance, and the data held in the holding unit And outputting the first identification data to the conversion device,
15. The information processing system according to claim 11, further comprising: The information processing apparatus includes an input unit to which data for determining whether or not the second identification data is valid is input by the determination unit, and is based on the data input to the input unit And outputting the first identification data to the conversion device,
15. The information processing system according to claim 11, further comprising: The information processing apparatus generates a change signal to change the data for determining whether or not the second identification data stored in the storage unit is valid to identification data different from the data And
The microcomputer uses the data for determining whether or not the second identification data stored in the storage unit is valid based on the change signal from the information processing apparatus as the data. Can be changed to different identification data,
The information processing system according to claim 12, wherein the information processing system is configured as described above. The first communication protocol between the information processing device and the conversion device and the second communication protocol between the microcomputer and the conversion device are different communication protocols,
The conversion device converts data corresponding to the first communication protocol output from the information processing device into data corresponding to the second communication protocol, and the second communication output from the microcomputer. Converting data corresponding to the protocol into data corresponding to the first communication protocol;
The information processing system according to any one of claims 11 to 17, wherein The microcomputer has a debugger unit for executing a debugging process on the predetermined data stored in the storage unit based on an instruction from the information processing apparatus,
The information processing apparatus can acquire the predetermined data in order to execute the debugging process by the debugger unit on the predetermined data.
The information processing system according to claim 11, wherein the information processing system is an information processing system. A microcomputer having a storage unit in which predetermined data is stored;
An information processing apparatus that acquires the predetermined data to execute predetermined processing on the predetermined data stored in the storage unit;
A data acquisition method in an information processing system having a relay device that relays data between the microcomputer and the information processing device,
The microcomputer outputs first identification data to the relay device based on an instruction from the information processing device,
The relay device converts the first identification data into second identification data and outputs the second identification data to the information processing device;
The information processing apparatus determines whether or not the second identification data is valid, and based on a determination result when the second identification data is valid, the predetermined information stored in the storage unit The predetermined data can be acquired to execute the predetermined processing on the data of
A data acquisition method for an information processing system. A microcomputer having a storage unit in which predetermined data is stored;
An information processing apparatus that acquires the predetermined data to execute predetermined processing on the predetermined data stored in the storage unit;
A data acquisition method in an information processing system having a relay device that relays data between the microcomputer and the information processing device,
The information processing device outputs first identification data to the relay device;
The relay device converts the first identification data into second identification data and outputs the second identification data to the microcomputer;
The microcomputer determines whether the second identification data is valid;
The information processing apparatus is configured to perform the predetermined process on the predetermined data stored in the storage unit based on a determination result when the second identification data is valid. Can be obtained,
A data acquisition method in an information processing system. In a microcomputer that has a storage unit that stores predetermined data and executes predetermined processing on the predetermined data based on an instruction from an external device.
Second identification data obtained by converting first identification data of the external device is input so that the external device acquires the predetermined data stored in the storage unit,
A determination unit that determines whether the second identification data is valid;
Based on the determination result of the determination unit when the second identification data is valid, the predetermined processing to the external device is performed so that the predetermined processing on the predetermined data by the external device can be executed. Data output is possible.
A microcomputer characterized by that. In a microcomputer that has a storage unit that stores predetermined data and executes predetermined processing on the predetermined data based on an instruction from an external device.
A conversion unit that converts first identification data of the external device into second identification data so that the external device acquires the predetermined data stored in the storage unit;
A determination unit for determining whether or not the second identification data is valid,
Based on the determination result of the determination unit when the second identification data is valid, the predetermined processing to the external device is performed so that the predetermined processing on the predetermined data by the external device can be executed. Data output is possible.
A microcomputer characterized by that.

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