CN105468389A - CPLD-based remote upgrading control method and apparatus - Google Patents

Abstract

The present invention discloses a CPLD-based remote upgrading control method. The method comprises: receiving a to-be-loaded file sent from a remote control platform, wherein the to-be-loaded file comprising file content and an attached check code, and the attached check code is uniquely generated after checking the file content of the loaded file according to a conventional algorithm; re-checking the received to-be-loaded file according to the conventional algorithm, generating a new unique check code, and comparing the new unique check code with the attached check code; and if the new generated check code is detected to be the same with the attached checked code, loading the to-be-loaded file on a CPLD. The present invention further discloses a CPLD-based remote upgrading control apparatus. According to the control method and apparatus provided by the present invention, errors in transmission of a to-be-loaded file can be timely found before loading a file, thereby keeping reliability of CPLD remote upgrading, maintaining the normal operation of the whole system, and preventing damage of an electronic device.

Description

CPLD-based remote upgrade control method and device

technical field

The invention relates to the field of electronic communication control, in particular to a CPLD-based remote upgrade control method and device.

Background technique

In the communication system, the use of electronic equipment increases and the version is continuously upgraded, and there are more and more firmware versions, such as: BOOT (boot) version of the processor, logic version of CPLD (Complex Programable Logic Device, complex programmable logic device) and FPGA (FieldProgrammableGateArray, Field Programmable Logic Gate Array) logic version, and the firmware version of programmable devices is often not static, and needs to be upgraded when customers request new functions or some defects occur.

In order to meet the maintainability requirements of the communication system, the upgrade of programmable devices is currently mainly through remote upgrades. During remote upgrades, first obtain the upgrade file of the programmable device to be loaded from the remote control platform through the external communication port, and save it in the system In the non-volatile memory, then the remote control platform sends the instruction to load the programmable logic device to the CPU, and then the CPU reads the file to be loaded from the non-volatile memory and loads the file to the programmable device through the loading interface of the loading circuit. Load, and feed back the loading result to the remote control platform, and output the corresponding result.

Generally, the loading circuit of the communication system has a certain fault-tolerant ability, and there is a corresponding processing mechanism for abnormal situations that occur during the loading process, but there is a situation that is difficult to deal with, that is, errors will occur during file transmission, An essential link in the remote upgrade process is to copy the file to be upgraded from the remote control platform to the communication device to be upgraded. There are certain risks in this process, and the uncertainty of the data transmission link leads to Errors may occur during file transfer that would go undetected during file loading. Although the probability of damage and error of the upgrade file during transmission is low, since the functions of programmable devices are generally very important in the communication system, once the file is loaded incorrectly, it is likely to cause abnormal operation of the entire system and even damage the equipment. High reliability requirements of communication equipment, this situation is absolutely not allowed and needs to be avoided. Therefore, how to ensure the reliability of CPLD remote upgrade is an urgent problem to be solved.

Contents of the invention

The main purpose of the present invention is to provide a remote upgrade control method and device based on CPLD complex programmable logic devices, aiming at ensuring the reliability of CPLD remote upgrade.

In order to achieve the above object, the present invention provides a CPLD-based remote upgrade control method, the CPLD-based remote upgrade control method includes the following steps:

Receive the file to be loaded sent by the remote control platform; the file to be loaded includes the file content and the attached check code, and the attached check code is unique after verifying the file content of the loaded file according to the agreed algorithm generate;

re-checking the received file to be loaded according to the agreed algorithm, generating a new unique check code, and comparing the newly generated check code with the attached check code;

If it is detected that the newly generated check code is the same as the attached check code, then load the file to be loaded to the CPLD.

Preferably, the step of re-checking the received file to be loaded according to the agreed algorithm, generating a new unique check code, and comparing the newly generated check code with the attached check code Then also include:

If it is detected that the newly generated check code is different from the attached check code, the result is fed back to the remote control platform to re-receive the file to be loaded sent by the remote control platform, and re-checking the received file to be loaded according to the agreed algorithm, generating a new unique check code, comparing the newly generated check code with the attached check code until the check codes are the same, Load the file to be loaded to the CPLD.

Preferably, the step of re-checking the received file to be loaded according to the agreed algorithm, generating a new unique check code, and comparing the newly generated check code with the attached check code Then also include:

If it is detected that the newly generated check code is the same as the attached check code, then save the file to be loaded to a non-volatile memory; if it detects that the newly generated check code is the same as the attached check codes are not the same, then delete the file to be loaded.

Preferably, the verification code of the file to be loaded is located at the head or tail of the file content.

Preferably, the agreed algorithm is MD5 algorithm.

In order to solve the above-mentioned technical problems, the present invention also provides a remote upgrade control device based on CPLD, the remote upgrade device includes:

The receiving module is used to receive the file to be loaded sent by the remote control platform; the file to be loaded includes file content and a unique check code corresponding to the file content;

A verification module, configured to verify the received file to be loaded according to an agreed algorithm, generate a new verification code, and compare the generated verification code with the verification code of the file to be loaded,

A loading module, configured to load the file to be loaded to the CPLD if it is detected that the newly generated check code is the same as the attached check code.

Preferably, the verification module is further configured to feed back the result to the remote control platform to receive the remote control again if it is detected that the newly generated verification code is different from the attached verification code The file to be loaded sent by the platform, and re-check the received file to be loaded according to the agreed algorithm, generate a new unique check code, and combine the newly generated check code and the attached check code The verification codes are compared until the verification codes are the same, and the file to be loaded is loaded to the CPLD.

Preferably, the CPLD-based remote upgrade control device further includes a storage module, which is used to re-check the received file to be loaded according to the agreed algorithm, generate a new unique check code, and store the Compare the newly generated check code with the attached check code, if it is detected that the newly generated check code is the same as the attached check code, save the file to be loaded to a non-volatile If it is detected that the newly generated check code is different from the attached check code, then delete the file to be loaded.

Preferably, the verification code of the file to be loaded is located at the head or tail of the file content.

Preferably, the agreed algorithm is MD5 algorithm.

The remote upgrade control method based on the CPLD complex programmable logic device provided by the present invention receives the file to be loaded sent by the remote control platform; the file to be loaded includes the file content and the attached check code, and the attached checksum The verification code is uniquely generated after verifying the file content of the loaded file according to the agreed algorithm; the received file to be loaded is re-verified according to the agreed algorithm to generate a new unique verification code, and the newly generated Check code and described attached check code are compared; If detect that described newly generated check code is identical with described attached check code, then load described to-be-loaded file to CPLD, the present invention is loading file It can detect errors in the transmission of the files to be loaded in time, so as to ensure the reliability of CPLD remote upgrade, maintain the normal operation of the entire system, and prevent damage to electronic equipment.

Description of drawings

Fig. 1 is the schematic flow chart of the first embodiment of the remote upgrade control method based on CPLD complex programmable logic device of the present invention;

Fig. 2 is the schematic flow chart of the second embodiment of the remote upgrade control method based on CPLD complex programmable logic device of the present invention;

Fig. 3 is the schematic flow chart of the third embodiment of the remote upgrade control method based on CPLD complex programmable logic device of the present invention;

FIG. 4 is a schematic diagram of functional modules of an embodiment of the remote upgrade control device based on CPLD complex programmable logic devices of the present invention.

The realization of the purpose of the present invention, functional characteristics and advantages will be further described in conjunction with the embodiments and with reference to the accompanying drawings.

detailed description

It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

The present invention provides a kind of remote upgrade control method based on CPLD, with reference to Fig. 1, Fig. 1 is the schematic flow chart of the first embodiment of the remote upgrade control method based on CPLD complex programmable logic device of the present invention, in the first embodiment, the The remote upgrading method based on CPLD comprises the following steps:

Step S100, receiving the file to be loaded sent from the remote control platform; the file to be loaded includes file content and an attached check code, and the attached check code verifies the file content of the loaded file according to the agreed algorithm Uniquely generated after verification.

The CPLD-based remote upgrade control device receives the file to be loaded sent by the remote control platform. The file to be loaded includes the content of the file and the attached check code, wherein the attached check code has been generated before the file to be loaded is received. The check code is a set of check codes generated according to the agreed algorithm Y=F(X) based on the file content of the loaded file. The agreed algorithm is uniquely determined for the check codes output by different files. The attached check code and the loading file are combined into a complete file according to the agreed method, which is used as the file of the system to be loaded. Verify the uploaded file according to the agreed algorithm before transferring it. The selection of the algorithm is relatively flexible, but in order to ensure the reliability of transmission, it is required that the check code output by the algorithm is unique for different file contents. In this embodiment, the agreed algorithm is MD5 (Message-DigestAlgorithm5, information-digest algorithm 5) The algorithm is illustrated as an example:

The MD5 algorithm is used to ensure the integrity and consistency of information transmission. It is one of the hash algorithms widely used by computers (also translated as digest algorithm, hash algorithm). The mainstream programming language generally has MD5 implementation. The typical application of MD5 is to process a message (byte string) to generate a unique "fingerprint" to prevent the content of the file from being "tampered with". Specifically, for different file MD5 algorithms, its byte string can be mapped to a group of 128-bit large integers. If the content of the file is damaged by mistake during the transmission process, the "fingerprint" generated by the MD5 algorithm of the damaged file, that is, a 128-bit large integer, must be different from the "fingerprint" generated by the MD5 algorithm of the original file, so that it can be loaded in time to be upgraded Find transmission errors in time before the file to avoid the situation that the system cannot work normally after the upgrade.

The 128-bit check code mapped by the MD5 algorithm of the file to be loaded is merged with the content of the file to be loaded into a complete file. The specific method of merging has no specific requirements, such as putting the MD5 check code at the head of the file to be loaded or At the end, the remote upgrade control device based on CPLD can quickly analyze which is the file content and which is the MD5 check code from the merged files to be loaded, so that the operation is convenient and the time for checking is not wasted.

Step S200, re-check the received file to be loaded according to the agreed algorithm, generate a new unique check code, and compare the newly generated check code with the attached check code.

The CPLD-based remote upgrade control device re-verifies the file to be loaded sent by the remote control platform according to the agreed algorithm, and parses the file content and check code from the file to be loaded according to the agreed method, and checks the file content according to the specific algorithm Y =F(X) also calculates a set of check codes, and compares the calculated check codes with the check codes contained in the received file to be loaded. In this embodiment, the CPU of the CPLD-based remote upgrade control device analyzes the file content of the file to be loaded and the attached 128-bit MD5 check code according to the agreed file merging method, and the CPU maps out the received file to be loaded according to the MD5 algorithm. Load the 128bit check code corresponding to the file content of the file, compare the mapped check code with the parsed 128bit MD5 check code, and feed back the result to the remote control platform.

Step S300, if it is detected that the newly generated check code is the same as the attached check code, load the file to be loaded to the CPLD.

The CPLD-based remote upgrade control device compares the mapped check code with the parsed 128bitMD5 check code, and feeds back the result to the remote control platform. If the check codes are the same, it proves that there is no error in the transmission of the file to be loaded. The file to be loaded is loaded to the CPLD.

This embodiment is based on the remote upgrade control method of the CPLD complex programmable logic device. Before the file is loaded, the error in the transmission of the file to be loaded is found in time, thereby ensuring the reliability of the remote upgrade of the CPLD, maintaining the normal operation of the entire system, and preventing Damage to electronic equipment.

Referring to Fig. 2, Fig. 2 is the schematic flow chart of the second embodiment of the remote upgrade control method based on the CPLD complex programmable logic device of the present invention, on the basis of the first embodiment, after the step S200, it also includes:

Step S300A, if it is detected that the newly generated check code is different from the attached check code, feedback the result to the remote control platform to re-receive the to-be-loaded check code sent by the remote control platform file, and re-check the received file to be loaded according to the agreed algorithm to generate a new unique check code, and compare the newly generated check code with the attached check code until the verification code is the same, load the file to be loaded to the CPLD.

If the CPLD-based remote upgrade control device detects that the newly generated check code is not the same as the attached check code during the check code comparison process, it will prove that an error occurred during the transmission of the file, and the result will be fed back To the remote control platform to prompt the file transmission error, the file to be loaded needs to be retransmitted, and the re-received file to be loaded is checked again according to the agreed algorithm, and a new unique check code is generated, which is the same as the checksum attached to the received file to be loaded. Check the codes for comparison until the check codes are the same, load the file to be loaded to the CPLD, and complete the normal loading and upgrading, thereby ensuring the reliability of the CPLD remote upgrade and ensuring that the CPLD is remotely upgraded to the latest version of the software.

Referring to Fig. 3, Fig. 3 is the schematic flow chart of the third embodiment of the remote upgrade control method based on the CPLD complex programmable logic device of the present invention, on the basis of the first embodiment, after the step S200, it also includes:

Step S300B, if it is detected that the newly generated check code is the same as the attached check code, then save the file to be loaded to a non-volatile memory; if it is detected that the newly generated check code and If the attached check codes are different, the file to be loaded is deleted.

If the CPLD-based remote upgrade control device detects that the newly generated check code is identical to the attached check code during the check code comparison process, the file to be loaded is saved to a non-volatile If it is detected that the newly generated check code is different from the attached check code, then the file to be loaded will be deleted, and the remote upgrade control device based on CPLD will detect the abnormal transmission The files to be loaded are deleted in time to ensure the storage space capacity of the non-volatile memory, so as to effectively receive the files to be loaded transmitted by the remote control platform next time, thereby ensuring the reliability of the remote upgrade of the CPLD.

The present invention further provides a remote upgrade control device based on CPLD complex programmable logic devices, referring to Fig. 4, Fig. 4 is a functional module schematic diagram of an embodiment of the present invention based on CPLD complex programmable logic device remote upgrade control devices, in a In an embodiment, the remote upgrade device includes:

The receiving module 10 is configured to receive the file to be loaded sent by the remote control platform; the file to be loaded includes file content and a unique check code corresponding to the file content;

The verification module 20 is used to verify the received file to be loaded according to the agreed algorithm, generate a new verification code, and compare the generated verification code with the verification code of the file to be loaded;

The loading module 30, if it is detected that the newly generated check code is the same as the attached check code, then load the file to be loaded to the CPLD.

The receiving module 10 of the CPLD-based remote upgrade control device receives the file to be loaded sent by the remote control platform. The file to be loaded includes file content and an attached check code, wherein the attached check code is received before the file to be loaded is received. It has already been generated, and the attached check code is a set of check codes generated according to the agreed algorithm Y=F(X) for the file content of the loaded file. The agreed algorithm is uniquely determined for the check codes output by different files. The verification code and the file to be loaded are combined into a complete file according to the agreed method, which is used as the file of the system to be loaded. Before the file to be loaded is transmitted, it is verified according to a specific algorithm. The selection of the algorithm is relatively flexible, but in order to ensure the reliability of transmission, it is required that the check code output by the algorithm is unique for different file contents. In this embodiment, the agreed algorithm is MD5 (Message-DigestAlgorithm5, information-digest algorithm 5) The algorithm is illustrated as an example:

The MD5 algorithm is used to ensure the integrity and consistency of information transmission. It is one of the hash algorithms widely used by computers (also translated as digest algorithm, hash algorithm). The mainstream programming language generally has MD5 implementation. The typical application of MD5 is to process a message (byte string) to generate a unique "fingerprint" to prevent the content of the file from being "tampered with". Specifically, for different file MD5 algorithms, its byte string can be mapped to a group of 128-bit large integers. If the content of the file is damaged by mistake during the transmission process, the "fingerprint" generated by the MD5 algorithm of the damaged file, that is, a 128-bit large integer, must be different from the "fingerprint" generated by the MD5 algorithm of the original file, so that it can be loaded in time to be upgraded Find transmission errors in time before the file to avoid the situation that the system cannot work normally after the upgrade.

The 128-bit check code mapped by the MD5 algorithm of the file to be loaded is merged with the content of the file to be loaded into a complete file. The specific method of merging has no specific requirements, such as putting the MD5 check code at the head of the file to be loaded or At the end, the remote upgrade control device based on CPLD can quickly analyze which is the file content and which is the MD5 check code from the merged files to be loaded, so that the operation is convenient and the time for checking is not wasted.

The verification module 20 of the CPLD-based remote upgrade control device re-verifies the file to be loaded sent by the remote control platform according to the agreed algorithm, and parses the file content and the check code from the file to be loaded according to the agreed method, and checks the file. The content also calculates a set of check codes according to the specific algorithm Y=F(X), and compares the calculated check codes with the check codes contained in the received file to be loaded. In this embodiment, the CPU of the CPLD-based remote upgrade control device analyzes the file content of the file to be loaded and the attached 128-bit MD5 check code according to the agreed file merging method, and the CPU maps out the received file to be loaded according to the MD5 algorithm. Load the 128bit check code corresponding to the file content of the file, compare the mapped check code with the parsed 128bit MD5 check code, and feed back the result to the remote control platform.

The loading module 30 of the remote upgrade control device based on CPLD compares the mapped check code with the parsed 128bitMD5 check code, and the result is fed back to the remote control platform. If the check code is the same, it proves that the file to be loaded has no Error, load the file to be loaded to CPLD.

This embodiment is based on the remote upgrade control device of the CPLD complex programmable logic device. Before the file is loaded, the error in the transmission of the file to be loaded is found in time, thereby ensuring the reliability of the remote upgrade of the CPLD, maintaining the normal operation of the entire system, and preventing Damage to electronic equipment.

Further referring to Fig. 4, the remote upgrade control device based on the CPLD complex programmable logic device provided by the present embodiment, the verification module 20 is also used for detecting the newly generated verification code and the attached verification code If the codes are not the same, the result is fed back to the remote control platform to re-receive the file to be loaded sent by the remote control platform, and re-check the received file to be loaded according to the agreed algorithm to generate a new unique check Code, compare the newly generated check code with the attached check code until the check code is the same, load and transmit the normal file to be loaded to the CPLD.

In the verification code comparison process, if the verification module 20 of the CPLD-based remote upgrade control device detects that the newly generated verification code is not the same as the attached verification code, it proves that the file is in the transmission process. If there is an error, the result will be fed back to the remote control platform to indicate that the file transmission error, the file to be loaded needs to be retransmitted, and the re-received file to be loaded will be checked again according to the agreed algorithm to generate a new unique check code, which is consistent with the received The check code attached to the file to be loaded is compared until the check code is the same, the file to be loaded is loaded to the CPLD, and the normal loading and upgrading is completed, thereby ensuring the reliability of the remote upgrade of the CPLD and ensuring that the CPLD is remotely upgraded to the latest version of the software.

With further reference to Fig. 4, the remote upgrade control device based on CPLD complex programmable logic device provided by the present embodiment, the remote upgrade control device based on CPLD also includes a storage module 40, and the storage module 40 is used to detect the The newly generated check code is the same as the attached check code, then save the file to be loaded to a non-volatile memory; if the newly generated check code and the attached check code are detected If they are not the same, the file to be loaded is deleted.

In the check code comparison process, if the storage module 40 of the CPLD-based remote upgrade control device detects that the newly generated check code is identical to the attached check code, the file to be loaded is saved to the nonvolatile memory; if it is detected that the newly generated check code is different from the attached check code, the file to be loaded will be deleted, and the storage module 40 of the remote upgrade control device based on CPLD will detect the abnormally transmitted pending The loading file is deleted in time to ensure the storage space capacity of the non-volatile memory, so as to effectively receive the file to be loaded transmitted by the remote control platform next time, thereby ensuring the reliability of CPLD remote upgrade.

The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process conversion made by using the description of the present invention and the contents of the accompanying drawings, or directly or indirectly used in other related technical fields , are all included in the scope of patent protection of the present invention in the same way.

Claims (10)

1. a kind of remote upgrade control method based on complex programmable logic device CPLD, it is characterized in that, described remote upgrade control method based on CPLD comprises the following steps: Receive the file to be loaded sent by the remote control platform; the file to be loaded includes the file content and the attached check code, and the attached check code is unique after verifying the file content of the loaded file according to the agreed algorithm generate; re-checking the received file to be loaded according to the agreed algorithm, generating a new unique check code, and comparing the newly generated check code with the attached check code; If it is detected that the newly generated check code is the same as the attached check code, then load the file to be loaded to the CPLD. 2. the remote upgrade control method based on CPLD as claimed in claim 1, is characterized in that, the described to-be-loaded file of described reception is verified again by agreed algorithm, generates new unique verification code, and described After the step of comparing the newly generated check code with the attached check code, it also includes: If it is detected that the newly generated check code is different from the attached check code, the result is fed back to the remote control platform to re-receive the file to be loaded sent by the remote control platform, and re-checking the received file to be loaded according to the agreed algorithm, generating a new unique check code, comparing the newly generated check code with the attached check code until the check codes are the same, Load the file to be loaded to the CPLD. 3. the remote upgrade control method based on CPLD as claimed in claim 1 or 2, it is characterized in that, the described to-be-loaded file of described reception is checked again by agreed algorithm, generates new unique check code, will After the step of comparing the newly generated check code with the attached check code, it also includes: If it is detected that the newly generated check code is the same as the attached check code, then save the file to be loaded to a non-volatile memory; if it detects that the newly generated check code is the same as the attached check codes are not the same, then delete the file to be loaded. 4. The CPLD-based remote upgrade control method according to claim 3, wherein the check code of the file to be loaded is located at the head or tail of the file content. 5. The remote upgrade control method based on CPLD as claimed in claim 1 or 2, characterized in that, the agreed algorithm is an MD5 algorithm. 6. A remote upgrade control device based on CPLD complex programmable logic device, it is characterized in that, described remote upgrade device comprises: The receiving module is used to receive the file to be loaded sent by the remote control platform; the file to be loaded includes file content and a unique check code corresponding to the file content; A verification module, configured to verify the received file to be loaded according to an agreed algorithm, generate a new verification code, and compare the generated verification code with the verification code of the file to be loaded; A loading module, configured to load the file to be loaded to the CPLD if it is detected that the newly generated check code is the same as the attached check code. 7. The remote upgrade control device based on CPLD as claimed in claim 6, wherein the verification module is also used for detecting that the newly generated verification code is different from the attached verification code , the result is fed back to the remote control platform to re-receive the file to be loaded sent by the remote control platform, and re-check the received file to be loaded according to the agreed algorithm to generate a new unique calibration Check code, compare the newly generated check code with the attached check code until the check codes are the same, and load the file to be loaded to the CPLD. 8. The remote upgrade control device based on CPLD as claimed in claim 6 or 7, characterized in that, the remote upgrade control device based on CPLD also includes a storage module, and the storage module is used to detect if the new The generated check code is the same as the attached check code, then save the file to be loaded to a non-volatile memory; if it is detected that the newly generated check code is not the same as the attached check code , then delete the file to be loaded. 9. The CPLD-based remote upgrade control device according to claim 8, characterized in that, the check code of the file to be loaded is located at the head or tail of the file content. 10. The CPLD-based remote upgrade control method according to claim 6 or 7, wherein the agreed algorithm is an MD5 algorithm.