CN101782859A - Upgrading method of embedded system in application - Google Patents
Upgrading method of embedded system in application Download PDFInfo
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Abstract
The invention discloses an upgrading method of an embedded system in the application, which comprises the following steps: an external nonvolatile memory is firstly configured; the external nonvolatile memory is divided, a backup partition is respectively arranged in a core partition and a document system partition so as to prevent the abnormal running situation of the device caused by the abnormality during the upgrading process. When the system runs normally in the working environment, the upgrading process is remotely controlled by an upgrade server, finally the system is restarted, and the normal running state of the system is restored. The upgrading method greatly reduces the development difficulty and the development period, is free from making a precisely-simplified core, reduces the development complexity, improves the stability and makes remarkable progress.
Description
Technical field
The present invention relates to embedded software technology field, more precisely relate to the upgrade method (IAP) of a kind of embedded system in application.
Background technology
In the prior art, embedded product is removed proprietary embedded hardware, and the overwhelming majority all is that the embedded software of pattern blocking is realized its special function.Along with the enhancing day by day of embedded product function, the complexity of embedded software is also in continuous increase.The problem in original program is repaired in the renewal of carrying out program how can be more convenient, efficient, safe, also becomes more and more important function of a product, often just need consider at the initial stage of system design.
Embedded product is when dispatching from the factory, often need by JTAG or specific programming tool, by non-volatile memory modules (as: the nand flash of chip to the outside, nor flash) programmes, the basic boot of programming (is also referred to as: Bootloader), pass through the kernel and the file system on this boot programming upper strata then.When carrying out the renewal of program, be the application program of upgrading the upper strata by the Bootloader of bottom mostly.Therefore the stability that guarantees Bootloader is that embedded system is carried out the precondition of upgrading in application.
But, make that the fragility of system increases greatly in the escalation process because that the process of upgrading often is subjected to the influence of external condition is bigger.As: run into communicating interrupt in the process of system upgrade, situations such as the improper outage of system can cause system normally not start or the ROMPaq renewal of wait routine always, finally cause system can not return to normal operating condition.
Chinese patent literature CN1928820A and CN101477471A disclose respectively by means of the miniature kernel after Bootloader and the cutting to carry out the renewal of system by network in the mode of http or tftp, to reduce the complicacy that Bootloader realizes driver and procotol.The restore funcitons that carries out system when host file system damages is provided in addition.
But even so, prior art solutions still has following weak point:
1. in the time of can not normally moving in system, carry out auto-update, promptly can not carry out remote upgrade by Long-distance Control.
2., do not help the system that to guarantee to resume operation again by means of the external world if upgrading is interrupted.
3. all adopted the micro-kernel of Bootloader and cutting, functional necessarily strengthened in, the complicacy of upgrading increased greatly, lowered the stability and the reliability of upgrading.
4. can not be provided with upgrade parameter neatly.
Therefore, those skilled in the art is devoted to develop a kind of upgrade method of new embedded system in application that can overcome above-mentioned shortcoming.
Summary of the invention
Because the above-mentioned defective of prior art, technical matters to be solved by this invention provides a kind of situation in upgrading interruption or failure can guarantee that system has self-reparability, recovers can carry out once more under the normal situation upgrade method of embedded system in application of update functions in communication.
For achieving the above object, the invention provides the upgrade method of a kind of embedded system in application, at first need the configuring external nonvolatile memory; And described external non-volatile memory carried out following subregion: the Bootloader that is used to deposit boot; Be used to deposit the Bootloader Config of Bootloader boot configuration; The Kernel that is used for the storage system kernel; The Kernel BAK that is used for the backup of storage system kernel; Be used to deposit the File System of file system; Be used to deposit the FileSystem BAK of file system backup.
When system normally moved in working environment, described upgrade method may further comprise the steps at least:
Step 2, checking is passed through as version match, and then the object of storage upgrading relevant information and definite upgrading is provided with relevant upgrading zone bit;
Step 3 is restarted system, and Bootloader finishes system initialization, the detection of the zone bit of upgrading; As position, correlating markings position, then system is moved subregion and switch to corresponding backup subregion, appearance causes system not recover unusually in escalation process to avoid;
Step 4 is carried out the renewal of system by the tftp agreement, and data updated is carried out verification, checks successfully, writes Flash; After operating successfully, again system is moved subregion and switch to the main partition;
Step 5 is carried out system and is restarted, the normal operating condition of recovery system.
Further, described zone bit all has the characteristic that power down is not lost.
Further, described external non-volatile memory is nand flash or nor flash.
Further, the program of described Bootloader subregion is not in new range more.
Further, described File System and/or described File System BAK also comprise child partition respectively.
Further, the relevant information of described storage upgrading is update service device IP address, upgrades number of retries.
Further, the object of described upgrading is Kernel and/or FS.
Further, after the described step 3, reaching under the condition of number of retries, restarting system from the backup partition running.
Technical conceive of the present invention is, externally under the situation that the storage unit cost constantly reduces, utilize exterior storage to create the double copies of kernel and file system, guarantee that upgrading is interrupted or the situation of failure can guarantee that system has self-reparability, recover to carry out update functions once more under the normal situation in communication.
The effect that the present invention is useful is: at first, when system moves, can be by the long-range escalation process of controlling of upgrade server, not needing the engineering staff to arrive device context upgrades separately each equipment, improved update efficiency so greatly, avoid man power and material's waste, saved cost.Especially in a LAN (Local Area Network) that has a lot of equipment, the mode efficient of this kind upgrading improves more obvious, has more remarkable economic efficiency.
Secondly, improve constantly (as: nand flah) along with the cost performance of external non-volatile memory, the present invention utilizes the external memory space of increase, kernel subregion and file partition are provided with the backup subregion respectively, to avoid the situation that appearance causes equipment normally not move unusually in the process of upgrading.
Therefore the 3rd, Bootloader of the present invention does not need the access file system, do not need special-purpose Bootloader, the Bootloader that generally increases income all can, as Uboot.
The 4th, the present invention greatly reduces development difficulty and construction cycle, does not need to make to simplify kernel, has lowered the complexity of exploitation to a certain extent, has improved stability, compares with the technical scheme described in the background technology, has obvious improvement.
Be described further below with reference to the technique effect of accompanying drawing, to understand purpose of the present invention, feature and effect fully design of the present invention, concrete structure and generation.
Description of drawings
Fig. 1 is the block plan of external non-volatile memory;
Fig. 2 is the process flow diagram of whole software upgrading;
Fig. 3 is the whole software module map.
Wherein:
● KERNEL_UPDATE_FLAG: kernel upgrading sign
● FS_UPDATA_FLAG: file system upgrading sign
● KERNEL_BAK_USE_FLAG: kernel backup area service marking
● FS_BAK_USE_FLAG: file system backup area service marking
Embodiment
In the specific embodiment of the present invention, be example with the ARM9 platform software, outside non-volatile memories is NAND Flash, and operating system is Linux, and file system is Busybox, and Bootloader is Uboot.
As shown in Figure 1, at first need the configuring external nonvolatile memory; And external non-volatile memory carried out following subregion:
Be used to deposit the Bootloader of boot; Hidden partition, system is invisible;
Be used to deposit the Bootloader Config of Bootloader boot configuration; Hidden partition, system is invisible;
The Kernel that is used for the storage system kernel; Hidden partition, system is invisible;
The Kernel BAK that is used for the backup of storage system kernel; Hidden partition, system is invisible;
Be used to deposit the File System of file system; File partition, system are as seen;
Be used to deposit the File System BAK of file system backup; Hidden partition, system is invisible.
As Fig. 2, shown in Figure 3, method of the present invention comprises:
When step 1, system are normally moved, received the upgrading broadcasting packet that upgrade server sends.
Step 2, the agreement of Linux inside are uploaded to broadcasting packet the upgrading finger daemon of application layer.
Step 3, upgrading are guarded the legitimacy and the version match information of carrying out this upgrading order and are verified.
Step 4, under the situation that checking is passed through, analytic message obtains upgrade information.
Step 5 is written to physical memory with the relevant information of upgrading, this physical memory need be in untapped global address space (/dev/mem), Boot oader visit after being convenient to.And the upgrading flag set that will be correlated with.
Step 6, the Reboot order of application call linux system, hot restart system.
Step 7 begins to carry out again initialization from bottom hardware, but does not know data in EMS memory.
Step 8, initialization finishes, and the upgrading module brings into operation.
Step 9, upgrading module are obtained the upgrade detection of zone bit of data in the physical memory.
Step 10 detects and passes through then initialization network, starts the tftp module and downloads to the update service device of appointment.
Step 11, download successfully after, the upgrade data of memory cache is carried out legitimate verification.
Step 12, checking is by then writing Nand Flash subregion.
Step 13, write Nand Flash success after, remove the correlating markings in the physical memory.
Step 14 is restarted system, enters normal operating condition.
More than describe preferred embodiment of the present invention in detail.The ordinary skill that should be appreciated that this area need not creative work and just can design according to the present invention make many modifications and variations.Therefore, all technician in the art all should be in claim protection domain of the present invention under this invention's idea on the basis of existing technology by the available technical scheme of logical analysis, reasoning, or a limited experiment.
Claims (8)
1. the upgrade method of an embedded system in application at first needs the configuring external nonvolatile memory; And described external non-volatile memory carried out following subregion: the Bootloader that is used to deposit boot; Be used to deposit the Bootloader Config of Bootloader boot configuration; The Kernel that is used for the storage system kernel; The Kernel BAK that is used for the backup of storage system kernel; Be used to deposit the File System of file system; Be used to deposit the File SystemBAK of file system backup; When system normally moved in working environment, described upgrade method may further comprise the steps at least:
Step 1, system receive that remote server sends the laggard line command legitimate verification of broadcasting upgrading order; Verify by then carrying out version match as checking;
Step 2, checking is passed through as version match, and then the object of storage upgrading relevant information and definite upgrading is provided with relevant upgrading zone bit;
Step 3 is restarted system, and Bootloader finishes system initialization, the detection of the zone bit of upgrading; As position, correlating markings position, then system is moved subregion and switch to corresponding backup subregion, appearance causes system not recover unusually in escalation process to avoid;
Step 4 is carried out the renewal of system by the tftp agreement, and data updated is carried out verification, checks successfully, writes Flash; After operating successfully, again system is moved subregion and switch to the main partition;
Step 5 is carried out system and is restarted, the normal operating condition of recovery system.
2. the upgrade method of embedded system as claimed in claim 1 in application, it is characterized in that: described zone bit all has the characteristic that power down is not lost.
3. the upgrade method of embedded system as claimed in claim 1 in application is characterized in that: described external non-volatile memory is nand flash or nor flash.
4. the upgrade method of embedded system as claimed in claim 1 in application is characterized in that: the program of described Bootloader subregion is not in new range more.
5. the upgrade method of embedded system as claimed in claim 1 in application is characterized in that: described File System and/or described File System BAK also comprise child partition respectively.
6. the upgrade method of embedded system as claimed in claim 1 in application is characterized in that: the relevant information of described storage upgrading is update service device IP address, upgrades number of retries.
7. the upgrade method of embedded system as claimed in claim 1 in application is characterized in that: the object of described upgrading is Kernel and/or FS.
8. the upgrade method of embedded system as claimed in claim 1 in application is characterized in that: after the described step 3, reaching under the condition of number of retries, restarting system from the backup partition running.
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| CN102799452A (en) * | 2012-06-29 | 2012-11-28 | 深圳市安普尔科技有限公司 | Method and device for upgrading system software |
| CN103049343A (en) * | 2011-10-14 | 2013-04-17 | 腾讯科技（深圳）有限公司 | Method and device for restoring operating system blue screen |
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| CN103577201A (en) * | 2012-07-20 | 2014-02-12 | 上海斐讯数据通信技术有限公司 | Embedded dual system updating method and system |
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| CN104090796A (en) * | 2014-07-08 | 2014-10-08 | 成都万维图新信息技术有限公司 | Embedded device program updating method and system |
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| CN106325911A (en) * | 2015-07-02 | 2017-01-11 | 中兴通讯股份有限公司 | Method and device for implementing BOOTROM upgrade |
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| CN112363749A (en) * | 2020-09-04 | 2021-02-12 | 中核武汉核电运行技术股份有限公司 | Safe starting and upgrading method of MIPS architecture system |
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| CN112214360B (en) * | 2020-11-05 | 2023-12-22 | 中国航空工业集团公司西安航空计算技术研究所 | Redundant area data real-time backup starting method oriented to online data loading |
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| CN113031991B (en) * | 2021-04-13 | 2023-11-17 | 南京大学 | Remote self-adaptive upgrading method and device for embedded system |
| CN113031991A (en) * | 2021-04-13 | 2021-06-25 | 南京大学 | Remote self-adaptive upgrading method and device for embedded system |
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