CN105354063A - Online program upgrading method and system - Google Patents
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Abstract
The invention discloses an online program upgrading method and system. The method comprises the following steps: powering a system so as to start the system; inquiring the orientation of a flag value; and executing a normal function program or a backup upgrade function program according to the orientation of the flag value; the method further comprises: after the system is started, judging whether a resetting manner is an upgrading abnormality reset one; and if judging the resetting manner as the upgrading abnormality reset one, executing the backup upgrade function program. The online program upgrading manner disclosed by the invention can be used for guaranteeing a completely reliable upgrading function of an embedded system. In the case of upgrading failure, the embedded system absolutely has the ability to perform a recovery operation, and thus requiring no depot repair.
Description
Technical field
The present invention relates to program on-line upgrading method, particularly the online upgrading method of firmware program in embedded system.
Background technology
Be disclose a kind of online upgrading method in the Chinese patent of CN101271396 at publication number, whether effectively judge to upgrade mark after being specially system electrification; If upgrade mark effectively, carry out downloading and upgrading; Enter subsequently and judge the whether successful step of download firmware; Be judged as downloading successfully in described step, can enter arrange upgrade be masked as invalid step.Now, likely occurred that the following two kinds is abnormal:
The first, if firmware itself has problem, the firmware itself as: burning is destroyed, or the reason such as the wrong firmware of burning effectively cannot be run in embedded system, and so this embedded system just cannot normally work again;
The second, if firmware itself has problem, as the firmware version mistake of burning, though effectively can be run in embedded system, but cannot perform and arrange renewal and be masked as effective step, so this embedded system just no longer has online upgrading function.
For above-mentioned two kinds of exceptions, this embedded system has not all had ability to perform recovery operation, just needs to carry out depot repair.
In order to avoid the problems referred to above, be describe one in CN102857818 and CN1464386 two parts of Chinese patents to upgrade more reliably mode at publication number.Its ultimate principle is: after embedded system powers on, and first runs one section of code, judges whether to need to carry out online upgrading operation.If needed, then perform online upgrading operation.Otherwise, perform embedded system regular traffic function program in redirect.
For the upgrading flow process of described CN1464386 patent, after system electrification, first run one section of setup code; Communicate to connect with outside afterwards, judge whether to need to carry out online upgrading operation according to the instruction of outside.This upgrading mode seems very reliable, allows system all possess online upgrading function always.But, this upgrading mode can bring a very large hidden danger to system: after embedded system powers on, need first to run one section of code, if this section of program is wrong, had influence on the execution of follow-up embedded system regular traffic function program, this section of code that so embedded system is first run after powering on just must must upgrade.And, reliable in order to ensure this section of code update operation, do not affect embedded system and use and online upgrading function, generally all need depot repair, this section of code of upgrading.
Summary of the invention
To be solved by this invention be the firmware itself that may occur in escalation process have problem or setup code wrong cause cannot normal ROMPaq problem.
For solving the problem, the invention provides a kind of program on-line upgrading method, comprising:
System electrification starts;
Judge that the mode resetted is no as upgrading exceptional reset;
If exceptional reset, perform upgrade function program;
If not exceptional reset, inquiry mark value, points to according to mark value and performs normal function program or upgrade function program,
Described upgrade function program is used for upgrading to normal function program.
Further, described program on-line upgrading method, also comprises, when performing described normal function program:
Receive upgrade command;
Confirm mark value, make it point to upgrade function program.
Further, described program on-line upgrading method, also comprises, when performing described upgrade function program:
Confirm mark value, make it point to upgrade function program.
Further, described program on-line upgrading method, also comprises:
Judge that whether upgrading is successful;
After confirmation upgrades successfully, confirm mark value, make it point to normal function program; And
By software restarting system.
The present invention also provides another kind of program on-line upgrading method, and internal memory comprises first interval and the second interval,
System electrification starts;
The sensing of inquiry mark value;
The first interval program is performed when mark value points to the first interval;
Judge whether that needs are upgraded;
After confirming upgrading, upgraded in the second interval.
Further, described program on-line upgrading method, also comprises:
To upgrade rear confirmation mark value, made it point to second interval; And
By software restarting system.
Further, described program on-line upgrading method, also comprises:
Described first interval and the second interval comprise the first value and the second value respectively;
Confirm mark value after starting to upgrade, make it point to second value in the first interval; And
Confirm mark value after completing upgrading, make it point to first value in the second interval.
Further, described program on-line upgrading method, also comprises:
System electrification judges whether reset mode is exceptional reset after starting;
Be judged as exceptional reset, confirm the sensing of mark value;
If point to the first value, the contrary interval program of execution flag value indication;
If point to the second value, execution flag value indication space program.
Further, described inspection AKU is correctly carry out according to the mode of CRC and School Affairs.
The present invention also provides a kind of program on-line upgrading system, comprising:
Controller, supports at least two kinds of reset modes;
Upgrading exceptional reset key, to controller input exceptional reset state; And
FLASH module,
Wherein, described FLASH module comprises:
Start redirect interval, be provided with at least two kinds of reset modes;
Between mark zone, between indicia point upgrade function program area or between normal function program area;
Between upgrade function program area, store upgrade function program; And
Between normal function program area, store normal function program,
Described upgrade function program is used for upgrading to described normal function program.
The present invention also provides a kind of program on-line upgrading system, comprising:
Controller, supports at least two kinds of reset modes;
Upgrading exceptional reset key, to controller input upgraded version rollback reset mode; And
FALSH module,
Wherein, described FALSH module comprises:
Start redirect interval, be provided with at least two kinds of reset modes;
Between mark zone, indicia point first interval or the second interval; And
First interval and the second interval, independently stores normal function program.
Further, described upgrading exceptional reset key and upgrading exceptional reset key are the reset modes of the pin level state adopting ERIP or GPIO.
Compared with prior art, program on-line upgrading mode according to the present invention can ensure that embedded system upgrade function is completely reliable.When upgrading unsuccessfully, embedded system has the ability to perform recovery operation completely, does not need to carry out depot repair.
Accompanying drawing explanation
Fig. 1 is the selection process flow diagram between the backup mode program area during upgrading of first embodiment of the invention;
Upgrading process flow diagram when Fig. 2 is the system executive utility interval program of first embodiment of the invention;
Fig. 3 be first embodiment of the invention execution backup upgrading functional areas between program time upgrading process flow diagram;
Fig. 4 is the upgrading process flow diagram of the dual system mode of second embodiment of the invention;
Fig. 5 is the upgrading process flow diagram of the dual system mode of third embodiment of the invention.
Embodiment
For enabling above-mentioned purpose of the present invention, feature and advantage more become apparent, and are described in detail the specific embodiment of the present invention below in conjunction with accompanying drawing.Set forth detail in the following description so that fully understand the present invention.But the present invention can be different from alternate manner described here to implement with multiple, those skilled in the art can when without prejudice to doing similar popularization when intension of the present invention.Therefore the present invention is not by the restriction of following public embodiment.
The upgrading mode introduced herein there are certain requirements hardware, and its requirement is as follows:
CPU needs to support to reset to control (ResetControl) function.From reset types (ResetType) register, at least can distinguish following several reset mode: electrification reset (PowerOnReset), software trigger reset (SoftwareReset), external pin resets (ExternalResetInputPin, be called for short: ERIP), described external pin is reset to external reset button, press this button, be equivalent to use ERIP function.
embodiment 1: the upgrading of backup mode
In FLASH, back up one there is upgrade function system, normal for ensureing system upgrade function.As shown in the table, in this type systematic, at least comprise 4 parts.
Flash allocation of space:
| Start redirect interval |
| Backup upgrading function program is interval |
| Between mark zone |
| Normal APP application program is interval |
Upon power-up of the system, the program in " starting redirect interval " is first performed.This program, according to marking interval mark (Flag) value in the current reset types (ResetType) of system and FLASH as basis for estimation, selects the program running " backup upgrading function program is interval " or " normal APP application program is interval ".Mark value only needs two kinds, and a kind of sensing is run " backup upgrading function program is interval "; The another kind of program pointing to operation " normal APP application program is interval ".Described backup upgrading function program is for upgrading to described normal function program.
Fig. 1 is the selection process flow diagram between the backup mode program area during upgrading of first embodiment of the invention.As shown in Figure 1, the selection flow process between program area comprises: S11, the value that after system electrification starts, inquiry reset types is corresponding; S12, judges whether described value is that upgrading exceptional reset key starts, if perform S16, otherwise performs S13; S13, the mark value in inquiry FLASH; S14, judges whether described mark value is pointed to " normal APP application program is interval ", if perform S15, otherwise performs S16; S15, performs the program of " normal use is interval "; S16, performs the program of " backup upgrading function program is interval ".
Upgrading process flow diagram when Fig. 2 is the system executive utility interval program of first embodiment of the invention.Flow process in continuous Fig. 1, as shown in Figure 2, when performing the program of " normal APP application program is interval ", upgrading flow process specifically comprises: S21, performs the program of " normal APP application program is interval "; S22, receives outside upgrade; S23, confirms mark value after receiving described outside upgrade, mark value is pointed to and performs " backup upgrading function program is interval "; S24, is restarted by software.Again the flow process shown in Fig. 1 can be carried out after carrying out restarting.Perform " backup upgrading function program is interval " because mark value has been set to point in said process, and reset key without exception starts, and can proceed to according to the flow process shown in Fig. 1 the step performing " backup upgrading function program is interval " program.
Fig. 3 be first embodiment of the invention execution backup upgrading functional areas between program time upgrading process flow diagram.Flow process in continuous Fig. 1 and Fig. 2, as shown in Figure 3, when performing the program of " between backup upgrading functional areas ", upgrading flow process specifically comprises: S31, the program that system performs " backup upgrading function program is interval "; S32 confirms mark value, makes it point to the program of execution " backup upgrading function program is interval "; S33, receives the outside level instruction risen; S34, according to the outside upgrading data packet of described command reception, and writes " normal APP application program is interval " in FLASH; S35, utilize the superfluous She's verification of circulation (CyclicRedundancyCheck, be called for short: CRC) or School Affairs (Checksum) mechanism, check the correctness of the upgrading data packet in write FLASH space, S36, judge that whether upgrading is successful, if successfully carry out S37, otherwise get back to S33; S37, confirms mark value after upgrading successfully, and makes it point to " normal APP application program is interval "; S38, restarts system by software control.Wherein mark value being pointed in S32 and performing " backup upgrading function program is interval " is occur in escalation process extremely, can carrying out updating operation all the time after system reboot to prevent; In S37, mark value is pointed to perform " normal APP application program interval " in order to system after having upgraded can perform upgrading after " normal APP application program interval " program.
When above-mentioned escalation process occurs abnormal, need according to occurring that abnormal reason carries out recovery operation.The exception that escalation process occurs is roughly divided into several as follows:
1, updating operation is abnormal, and mark value is pointed to " backup upgrading function program is interval ".Now, system is de-energized restarts, and system according to mark value, can select the program running " backup upgrading function program is interval ".Like this, system still has online upgrading function, can carry out updating operation to " normal APP application program is interval ".
2, updating operation is abnormal, and mark value is pointed to " normal APP application program is interval ".This situation generally there will not be.According to above-mentioned flow process, after performing updating operation, the upgrading data packet needing again to read new write in FLASH carries out CRC or check sum check.When after verification succeeds, just can confirm mark value, make it point to " normal APP application program is interval ".This illustrate, in updating operation, be not effective application program in upgrading data packet, however the CRC of upgrading data packet or check sum check successful.Except system testers deliberately and for it, the probability of the appearance of this abnormal conditions is very low.For this exception, need the upgrading exceptional reset key of Help of System outside.After pressing this upgrading exceptional reset key, the program that Systematic selection runs " backup upgrading function program is interval ".Like this, system is provided with again online upgrading function, can carry out updating operation to " normal APP application program is interval ".
For the parts having (SuSE) Linux OS, " normal APP application program is interval " comprising: boot (Bootloader), linux system kernel (LinuxKernel), linux root file system (LinuxRootfs).Although, this part code can be copied to RAM from FLASH space after the program that when systems are functioning properly, system performs " normal APP application program is interval " and run.But, have LinuxRootfs in system, thus cause the program of " normal APP application program is interval " updating operation cannot be carried out to self, use the content of the program upgrade " normal APP application program is interval " of " backup upgrading function program is interval " completely.In addition, when occurring abnormal when upgrading, the same during upgrading flow process when its abnormality processing mode and executive utility interval program.
the upgrading of embodiment 2: the first dual system mode
The method is mainly used in the upgrading of the parts without operating system.The advantage of this upgrading mode is: upgrade unsuccessfully, and system still can run the application program of legacy version.
Deposit in FLASH two " normal APP application program is interval ", for alternately upgrading and use.As shown in the table, in this type systematic, at least comprise 4 parts.
Flash allocation of space:
| Start redirect interval |
| Between mark zone |
| First is interval |
| Second is interval |
Upon power-up of the system, the program started in redirect interval is first performed.This program as basis for estimation, selects the program in interval or the second interval of operation first according to the mark value in the current reset types of system and FLASH.As shown in table 1, Systematic selection runs the judgment mode in the first/the second interval.Described first and second intervals are for storing the identical function interval of normal APP application program.
Fig. 4 is the upgrading process flow diagram of the dual system mode of second embodiment of the invention.Wherein, when X represents the first interval, Y represents that second is interval; When X represents the second interval, Y represents that first is interval, and its idiographic flow comprises: after S41 electrifying startup, execution flag value points to interval program; S42, the interval that described mark value is pointed to is that X is interval, performs the interval regular traffic function of X; In execution regular traffic function, S43, judges whether that needs are upgraded simultaneously, if perform S44, otherwise get back to S42 and proceed regular traffic function program; S44, receives upgrade, upgrades to Y interval; S45, receives outside upgrading data packet, and writes in Y interval; S46, utilizes CRC or School Affairs mechanism, checks the correctness of the upgrading data packet in write Y interval; S47, judges whether to upgrade successfully, if successful execution S48, otherwise gets back to S44 and re-starts upgrading; S48, confirms mark value, makes it point to " Y " interval; S49, restarts system by software control.
The advantage of described scheme:
1., when system needs to upgrade, in the first or second interval, select current untapped space to carry out updating operation.Such as, current system runs, and selects the program in operation first interval.So, when upgrading, needing upgrading data packet to put into the second interval, being upgraded in the second interval.Like this, even if upgrade unsuccessfully, the program in the first interval is still kept intact, there do not have to be destroyed, and system still can select the program in operation first interval.
2. updating operation is abnormal, and mark value points to X interval.Now, system is de-energized restarts, and system according to mark value, can select the program running X interval.Like this, system still runs the application program of legacy version.
the upgrading of embodiment 3: the second dual system mode
In order to improve the stability of dual system mode further, the present embodiment is when being included in two " normal APP application program is interval " that embodiment 2 is mentioned, and the method arranging two marks in each interval strengthens the stability of upgrade-system further.Table 1:
In above-mentioned table, as embodiment 2 is mentioned, when X represents the first interval, Y represents that second is interval; When X represents the second interval, Y represents that first is interval.Below with reference to Fig. 5, upgrade method is according to a third embodiment of the present invention described in detail.
Fig. 5 is the upgrading process flow diagram of the dual system mode of third embodiment of the invention.As shown in Figure 5, described upgrading flow process comprises: S51, inquires about the value of register corresponding to reset types after electrifying startup; S52, determines whether that upgrading exceptional reset starts, if perform S54, otherwise performs S53; S53, execution flag value points to interval program; S54, judges whether that sensing second is worth, if perform S53, otherwise performs S56; S56, execution flag value points to contrary interval program; S55, the interval normal business function program of the correspondence that continuous S55 or S56 determines, corresponding interval described here is set as that X is interval; S57, judges whether to need upgrading, if desired performs S58, otherwise get back to S55; S58, confirms mark value, makes it point to second value in X interval, S59, receives upgrade, upgrades to Y interval; S510, receives outside upgrading data packet, and writes in Y interval; S511, utilizes CRC or School Affairs mechanism, checks the correct of the upgrading data packet in write Y interval; S512, judges upgrading whether success, if successful execution S513, otherwise gets back to S59 and re-starts upgrading; S513, determines mark value, makes it point to interval first value of Y; S514, by software control restarting systems.Wherein, in S58, indicia point is referred to that second value in row X interval keeps a record to start upgrade step, and in escalation process, carry out upgrading exceptional reset start, the Y interval program that system can not be caused to perform also do not upgraded; By restarting the interval recent program of the Y after running upgrading by first value in indicia point Y interval in S513 after upgrading successfully.
Described scheme possesses the advantage of embodiment 2, meanwhile, when upgrading unsuccessfully, if FLAG value also points to Y system, according to determining whether it is that the mode of the first value or the second value is got back to and performed the interval program of X.Like this, system still can run the application program of legacy version.
The ultimate principle of the upgrading mode introduced herein is: according to mark value, the interval that Systematic selection starts.When occurring that serious upgrading is abnormal, cause mark value normally to be manipulated, then by a special hardware state, the program in startup optimization backup upgrading function program interval or legacy version interval, allows system be recovered.Here, this " special hardware state " upgrading exceptional reset key control.From reset types register, check whether the mode employing exceptional reset, judge that system is recovered in abnormal from serious upgrading.
Certainly, also according to the actual conditions of hardware, can select described " special hardware state ".Such as, (GeneralPurposeInputOutput, is called for short: pin level state GPIO), emitting, changing the pin level state value of GPIO by jumping to use universal input to export.
Although the present invention with preferred embodiment openly as above; but it is not for limiting the present invention; any those skilled in the art without departing from the spirit and scope of the present invention; the Method and Technology content of above-mentioned announcement can be utilized to make possible variation and amendment to technical solution of the present invention; therefore; every content not departing from technical solution of the present invention; the any simple modification done above embodiment according to technical spirit of the present invention, equivalent variations and modification, all belong to the protection domain of technical solution of the present invention.
Claims (10)
1. a program on-line upgrading method, comprising:
System electrification starts;
Judge whether the mode resetted is upgrading exceptional reset;
If exceptional reset, perform upgrade function program;
If not exceptional reset, inquiry mark value, points to according to mark value and performs normal function program or upgrade function program,
Described upgrade function program is used for upgrading to described normal function program.
2. program on-line upgrading method according to claim 1, also comprises, when performing described normal function program:
Receive upgrade command;
Confirm mark value, make it point to upgrade function program.
3. program on-line upgrading method according to claim 1 and 2, also comprises, when performing described upgrade function program:
Confirm mark value, make it point to upgrade function program.
4. program on-line upgrading method according to claim 4, also comprises:
Judge that whether upgrading is successful;
After confirmation upgrades successfully, confirm mark value, make it point to normal function program; And
By software restarting system.
5. a program on-line upgrading method, internal memory comprises first interval and the second interval:
System electrification starts;
The sensing of inquiry mark value;
The first interval program is performed when mark value points to the first interval;
Judge whether that needs are upgraded;
After confirming upgrading, upgraded in the second interval.
6. program on-line upgrading method according to claim 5, also comprises:
To upgrade rear confirmation mark value, made it point to second interval; And
By software restarting system.
7. program on-line upgrading method according to claim 6, also comprises:
Described first interval and the second interval comprise the first value and the second value respectively;
Confirm mark value after starting to upgrade, make it point to second value in the first interval; And
Confirm mark value after completing upgrading, make it point to first value in the second interval.
8. program on-line upgrading method according to claim 7, comprising:
System electrification judges whether reset mode is exceptional reset after starting;
Be judged as exceptional reset, confirm the sensing of mark value;
If point to the first value, the contrary interval program of execution flag value indication;
If point to the second value, execution flag value indication space program.
9. a program on-line upgrading system, comprises
Controller, supports at least two kinds of reset modes;
Upgrading exceptional reset key, to controller input exceptional reset state; And
FALSH module,
Wherein, described FLASH module comprises:
Start redirect interval, be provided with at least two kinds of reset modes;
Between mark zone, between indicia point upgrade function program area or between normal function program area;
Between upgrade function program area, store upgrade function program; And
Between normal function program area, store normal function program,
Described upgrade function program is used for upgrading to described normal function program.
10. a program on-line upgrading system, comprising:
Controller, supports at least two kinds of reset modes;
Upgrading exceptional reset key, to controller input upgrading exceptional reset state; And
FALSH module,
Wherein, described FALSH module comprises:
Start redirect interval, be provided with at least two kinds of reset modes;
Between mark zone, indicia point first interval or the second interval; And
First interval and the second interval, independently stores normal function program.
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| CN112181455B (en) * | 2020-09-24 | 2024-04-26 | 深圳数联天下智能科技有限公司 | Online upgrading method of microcontroller, microcontroller and storage medium |
| CN112631627A (en) * | 2020-12-10 | 2021-04-09 | 武汉联影医疗科技有限公司 | Software upgrading method and device, computer equipment and storage medium |
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