CN106503542B - Equipment parameter rewriting prevention method, equipment and air conditioner - Google Patents
Equipment parameter rewriting prevention method, equipment and air conditioner Download PDFInfo
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- G06F21/50—Monitoring users, programs or devices to maintain the integrity of platforms, e.g. of processors, firmware or operating systems
- G06F21/51—Monitoring users, programs or devices to maintain the integrity of platforms, e.g. of processors, firmware or operating systems at application loading time, e.g. accepting, rejecting, starting or inhibiting executable software based on integrity or source reliability
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- G06F21/50—Monitoring users, programs or devices to maintain the integrity of platforms, e.g. of processors, firmware or operating systems
- G06F21/52—Monitoring users, programs or devices to maintain the integrity of platforms, e.g. of processors, firmware or operating systems during program execution, e.g. stack integrity ; Preventing unwanted data erasure; Buffer overflow
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Abstract
The invention discloses an equipment parameter rewriting prevention method, equipment and an air conditioner, and solves the technical problem that data in an EEPROM in the existing equipment is easy to rewrite. Reading starting data stored in an EEPROM after equipment is powered on; judging whether the starting data is normal or not; if yes, backing up the starting data; if not, writing the backup starting data into the EEPROM after judging the normal state when the equipment is powered on for the previous time so as to enable the equipment to execute the data starting equipment in the EEPROM; the protection of the starting data is realized through a mechanism of first power-on backup and then starting, so that the technical problem that the data in the EEPROM in the existing equipment is easy to rewrite is solved, and the backup and the recovery of the latest starting data are realized; in addition, the starting data does not need to be written in the running program, so that unified software can be developed when the same series of equipment models using different starting data are developed, and the universality of software design is improved.
Description
Technical Field
The invention belongs to the technical field of air conditioners, and particularly relates to an equipment parameter rewriting prevention method, equipment and an air conditioner.
Background
In a control circuit board of an electronic device, such as an air conditioner, a hardware filter circuit and a voltage stabilizing circuit are designed to maintain the anti-interference performance of the circuit and the stability of a power supply.
Generally, the lowest working voltage of an MCU (micro control unit) of the device is 4.5V, and the lowest working voltage of an EEPROM (electrically erasable programmable read only memory) is 1.8V, when a power supply is frequently turned on and off, the power supply voltage of the power supply is between 1.8V and 4.5V, at this time, the MCU stops working, and the EEPROM is still working, i.e., the EEPROM can be read and written, and at this time, the MCU stops working to make the EEPROM in an out-of-control state, at this time, the filter circuit and the voltage regulator circuit also stop working due to too low voltage, so that the EEPROM may be interfered, and the read and write instructions are interrupted and data are rewritten due to electromagnetic field or power supply abnormality.
The EEPROM generally stores application data of a facility system and an electric control, and for example, in the case of an air conditioner, the EEPROM stores operation parameters such as a position of a guide plate of the air conditioner, a wind speed, and a set temperature, and if these parameters are rewritten, an abnormal start-up of the air conditioner may be caused.
Disclosure of Invention
The application provides an equipment parameter rewriting prevention method, equipment and an air conditioner, and solves the technical problem that data in an EEPROM in the existing equipment is easy to rewrite.
In order to solve the technical problems, the application adopts the following technical scheme:
a device parameter rewriting prevention method is provided, which comprises the following steps: after the equipment is powered on, reading starting data stored in the EEPROM; judging whether the starting data is normal or not; if yes, backing up the starting data; if not, writing the backup starting data after judging to be normal into the EEPROM when the equipment is powered on for the previous time so as to enable the equipment to execute the data in the EEPROM to start the equipment; and the starting data is the operation setting parameters stored in the EEPROM when the equipment is powered off.
Further, when the device is powered on for the previous time, the backup starting data after being judged to be normal is written into the EEPROM, specifically: reading the backup starting data after the equipment is judged to be normal when the equipment is powered on for the previous time from a storage unit of an MCU of the equipment; writing the backup starting data into the EEPROM; or, reading the backup starting data from the backup area of the EEPROM after the equipment is judged to be normal when being powered on for the previous time; and writing the backup starting data into the EEPROM.
Further, the determining whether the start data is normal specifically includes: weighting and calculating the read starting data; comparing the weighted sum calculation result with a value stored in a check bit in the EEPROM; judging whether the comparison results are consistent; and the value stored by the check bit is the weighted sum of the operation setting parameters stored in the EEPROM when the equipment is powered on and is powered off last time.
An apparatus is proposed, comprising an MCU and an EEPROM; the EEPROM is used for storing starting data of the equipment; the device further comprises a backup unit; the MCU comprises a reading and writing unit, a judging unit and a starting unit; the read-write unit is used for reading the starting data stored in the EEPROM after the equipment is powered on; the judging unit is used for judging whether the starting data is normal or not; the backup unit is used for backing up the starting data judged to be normal by the judging unit when the equipment is powered on; when the judging unit judges that the starting data is abnormal, the reading and writing unit is also used for reading the starting number which is backed up when the judging unit judges that the equipment is normal when being powered on last time from the backup unit and writing the starting number into the EEPROM so as to start the equipment based on the backup starting data; and the starting data is the operation setting parameters stored in the EEPROM when the equipment is powered off.
Further, the backup unit is a storage unit of the MCU of the equipment; or, the backup unit is a backup area in the EEPROM.
Further, the judging unit comprises a weighting module and a comparing module; the weighting module is used for weighting and calculating the read starting data; the comparison module is used for comparing the weighting and calculation result with the value stored in the check bit in the EEPROM and judging whether the comparison result is consistent; and the value stored by the check bit is the weighted sum of the operation setting parameters stored in the EEPROM when the equipment is powered on and is powered off last time.
An air conditioner is provided, which comprises an MCU and an EEPROM; the EEPROM is used for storing starting data of the air conditioner; the air conditioner further comprises a backup unit; the MCU comprises a reading and writing unit, a judging unit and a starting unit; the read-write unit is used for reading the starting data stored in the EEPROM after the air conditioner is powered on; the judging unit is used for judging whether the starting data is normal or not; the backup unit is used for backing up the starting data judged to be normal by the judging unit when the air conditioner is powered on; when the judging unit judges that the starting data is abnormal, the reading and writing unit is also used for reading the starting data which is backed up when the judging unit judges that the air conditioner is normal when being powered on last time from the backup unit and writing the starting data into the EEPROM so as to start the air conditioner based on the backup starting data; and the starting data is the operation setting parameters stored in the EEPROM when the air conditioner is powered off.
Further, the backup unit is a storage unit of the MCU of the air conditioner; or, the backup unit is a backup area in the EEPROM.
Further, the judging unit comprises a weighting module and a comparing module; the weighting module is used for weighting and calculating the read starting data; the comparison module is used for comparing the weighting and calculation result with the value stored in the check bit in the EEPROM and judging whether the comparison result is consistent; and the value stored in the check bit is the weighted sum of the operation setting parameters stored in the EEPROM when the air conditioner is powered on and is powered off last time.
Compared with the prior art, the application has the advantages and positive effects that: in the method, the equipment and the air conditioner for preventing the equipment parameter from being rewritten, after the equipment is electrified and reads the starting data in the EEPROM, the step of starting the equipment according to the starting data is not directly executed, but whether the starting data is normal or not is judged firstly, if the starting data is normal, the starting data read from the EEPROM is backed up, after the backup is finished, a starting program is executed according to the starting data, if the starting data is abnormal, the starting data which is backed up after the equipment is electrified and judged to be normal is read out and written into the EEPROM, so that the equipment is started according to the rewritten backup starting data; therefore, the protection of the starting data is realized through a mechanism of firstly powering up and then starting, and the method is different from the conventional mode of backing up the factory starting data and recovering the EEPROM data by the factory starting data after the data in the EEPROM is damaged; in addition, the method can realize equipment starting only by writing the starting data into the EEPROM without writing the starting data into the running program, so that unified software can be developed when the same series of equipment models using different starting data are developed, different versions of software are not required to be modified for each model due to different starting data, the universality of software design is improved, and manual misoperation caused by software editing for many times is avoided.
Other features and advantages of the present application will become more apparent from the detailed description of the embodiments of the present application when taken in conjunction with the accompanying drawings.
Drawings
FIG. 1 is a flow chart of an apparatus parameter overwrite prevention method proposed in the present application;
fig. 2 is a diagram of the apparatus architecture proposed in the present application.
Detailed Description
The following describes embodiments of the present application in further detail with reference to the accompanying drawings.
The application aims to provide an equipment parameter anti-rewriting method, which realizes the anti-rewriting protection of equipment starting data, enhances the anti-jamming capability of equipment and ensures normal starting.
As shown in fig. 1, the present application provides a method for rewriting a device parameter room, which includes the following steps:
step S11: the device is powered on.
Step S12: and reading the starting data stored in the EEPROM.
When the equipment is powered off, starting data, such as equipment operation setting parameters, are written into the EEPROM for storage, and after the equipment is powered on, the starting data are read from the EEPROM according to the common steps, and the equipment is started according to the starting data. However, before power-off or power-on is stable, the operating voltage is between 1.8V and 4.5V, during which time, the EEPROM may be wrongly rewritten due to factors such as interference, and the start data may be damaged, so that the device may not be normally started.
Step S13: and judging whether the starting data is normal or not.
In the application, after the starting data is read from the EEPROM, the starting data is not directly used for starting the equipment, but firstly, after judgment, when the judgment is normal,
step S14: the startup data is backed up.
After the startup data is judged to be normal, the startup data is backed up, and the backup area is preferably a storage unit of the MCU, may also be a special backup area started in the EEPROM, and may also be an individual storage device.
If the startup data is not normal, step S15: and writing the backup starting data into the EEPROM after the equipment is judged to be normal when the equipment is powered on for the previous time so that the equipment executes the data in the EEPROM to start the equipment.
When the read data is judged to be abnormal, the backup boot data after the judgment of the normality is read out and written into the EEPROM through the steps S11 to S14 when the device is powered on from the backup area for the previous time, and then the device reads the rewritten backup boot data from the EEPROM to execute the boot program.
The method in the application is different from the conventional mode of backing up factory startup data and recovering EEPROM data by using the factory startup data after the data in the EEPROM is damaged, and not only is the technical problem that the data in the EEPROM in the conventional equipment is easy to rewrite solved, but also the equipment can be ensured to be normally started after the data in the EEPROM is damaged, and the backup and the recovery of the latest startup data are realized.
In addition, the method provided by the embodiment of the application can realize equipment starting only by writing the starting data into the EEPROM without writing the starting data into the running program, so that unified software can be developed when the same series of equipment models using different starting data are developed, different versions of software do not need to be modified for each model due to different starting data, the universality of software design is improved, and the problem of manual misoperation caused by multiple times of software editing is avoided.
When judging whether the starting data is normal or not, a weighting and checking mode can be used, specifically, the read starting data is weighted and calculated, then the weighting and calculation result is compared with a numerical value stored in a check bit in the EEPROM, the check bit is a storage space which is specially used for storing the check value and is arranged in the EEPROM except the starting data, the weighted sum of the operation setting parameters stored in the EEPROM is stored when the equipment is powered on for the previous time, if the judgment result is consistent, the starting data is normal, otherwise, the starting data is damaged. Of course, since the weighting sum occupies more storage bits, the check value here may also be the value of the weighting sum taking the last bit, and accordingly, the value of the last tail bit is also taken as the weighting sum calculation result to be compared with the check value, or the check value here may be the value of a set bit, for example, the bit value should be AA, and then it is checked whether the value of the set bit is AA during the check. The present application also does not limit the manner of determining whether the startup data is normal according to this embodiment.
Based on the above proposed method for preventing device parameters from being rewritten, the present application also proposes a device, as shown in fig. 2, the device includes an MCU 21, an EEPROM 22, and a backup unit 23; the EEPROM 22 is used to store startup data of the device; the MCU 21 specifically includes a reading/writing unit 211, a judging unit 212, and a starting unit 213; the read-write unit 211 is configured to read the start data stored in the EEPROM 22 after the device is powered on; the judging unit 212 is used for judging whether the starting data is normal; the backup unit 23 is used for backing up the startup data judged to be normal by the judging unit when the device is powered on; when the judging unit 212 judges that the startup data is abnormal, the reading and writing unit 211 is further configured to read, from the backup unit 23, the startup number that is backed up when the judging unit judges that the device is normal when the device was powered on last time and write the startup number into the EEPROM 22, so that the device is started based on the backup startup data; the starting data is operation setting parameters stored in an EEPROM when the equipment is powered off.
The backup unit 23 here may be a storage unit of the MCU of the device; or, as a backup area in the EEPROM 22; or, be a separate memory device.
The determining unit 212 may specifically include a weighting module and a comparing module; the weighting module is used for weighting and calculating the read starting data; the comparison module is used for comparing the weighting and calculation result with a numerical value stored in a check bit in the EEPROM and judging whether the comparison result is consistent or not; if the data are consistent, the starting data are normal, otherwise, the data are abnormal. The check bit stores a value which is a weighted sum of the operation setting parameters stored in the EEPROM when the equipment is powered on and powered off last time.
Based on the above method and device for preventing device parameters from being rewritten, the application also provides an air conditioner, which comprises an MCU, a backup unit and an EEPROM; the EEPROM is used for storing the starting data of the air conditioner; the MCU comprises a reading and writing unit, a judging unit and a starting unit; the read-write unit is used for reading the starting data stored in the EEPROM after the air conditioner is powered on; the judging unit is used for judging whether the starting data is normal or not; the backup unit is used for backing up the starting data judged to be normal by the judging unit when the air conditioner is powered on; when the judging unit judges that the starting data is abnormal, the reading and writing unit is also used for reading the starting data which is backed up when the judging unit judges that the air conditioner is normal when the air conditioner is powered on last time from the backup unit and writing the starting data into the EEPROM so as to start the air conditioner based on the backup starting data; the starting data is the operation setting parameters stored in the EEPROM when the air conditioner is powered off.
The backup unit can be a storage unit of the MCU of the air conditioner; or, it is a backup area in EEPROM; or, be a separate memory device.
The judging unit may specifically include a weighting module and a comparing module; the weighting module is used for weighting and calculating the read starting data; the comparison module is used for comparing the weighting and calculation result with a numerical value stored in a check bit in the EEPROM and judging whether the comparison result is consistent or not; the value stored in the check bit is the weighted sum of the operation setting parameters stored in the EEPROM when the air conditioner is powered on and is powered off last time.
It should be noted that the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and those skilled in the art should also make changes, modifications, additions or substitutions within the spirit and scope of the present invention.
Claims (8)
1. The method for preventing the equipment parameter from being rewritten is characterized by comprising the following steps:
after the equipment is powered on, reading starting data stored in the EEPROM;
judging whether the starting data is normal or not; if so,
backing up the starting data; if not, the user can not select the specific application,
writing the backup starting data into the EEPROM after the device is judged to be normal by the steps when the device is powered on for the previous time so as to enable the device to execute the data in the EEPROM to start the device;
the starting data are operation setting parameters stored in the EEPROM when the equipment is powered off;
when the device is powered on for the previous time, the backup starting data after the judgment of normality is written into the EEPROM, and the method specifically comprises the following steps:
reading the backup starting data after the equipment is judged to be normal when the equipment is powered on for the previous time from a storage unit of an MCU of the equipment;
writing the backup starting data into the EEPROM; or the like, or, alternatively,
reading the backup starting data after the equipment is judged to be normal when being powered on for the previous time from the backup area of the EEPROM;
and writing the backup starting data into the EEPROM.
2. The method according to claim 1, wherein the determining whether the startup data is normal specifically includes:
weighting and calculating the read starting data;
comparing the weighted sum calculation result with a value stored in a check bit in the EEPROM;
judging whether the comparison results are consistent;
and the value stored by the check bit is the weighted sum of the operation setting parameters stored in the EEPROM when the equipment is powered on and is powered off last time.
3. An apparatus for preventing rewriting parameter, including MCU and EEPROM; the EEPROM is used for storing starting data of the equipment; characterized in that the device further comprises a backup unit;
the MCU comprises a reading and writing unit, a judging unit and a starting unit;
the read-write unit is used for reading the starting data stored in the EEPROM after the equipment is powered on;
the judging unit is used for judging whether the starting data is normal or not;
the backup unit is used for backing up the starting data judged to be normal by the judging unit when the equipment is powered on;
when the judging unit judges that the starting data is abnormal, the reading and writing unit is also used for reading the starting number which is backed up when the judging unit judges that the equipment is normal when being powered on last time from the backup unit and writing the starting number into the EEPROM so as to start the equipment based on the backup starting data;
the starting data are operation setting parameters stored in the EEPROM when the equipment is powered off; when the device is powered on for the previous time, the backup starting data after the judgment of normality is written into the EEPROM, and the method specifically comprises the following steps:
reading the backup starting data after the equipment is judged to be normal when the equipment is powered on for the previous time from a storage unit of an MCU of the equipment;
writing the backup starting data into the EEPROM; or the like, or, alternatively,
reading the backup starting data after the equipment is judged to be normal when being powered on for the previous time from the backup area of the EEPROM;
and writing the backup starting data into the EEPROM.
4. The device for preventing rewriting of parameters of claim 3, wherein the backup unit is a storage unit of an MCU of the device; or the like, or, alternatively,
the backup unit is a backup area in the EEPROM.
5. The apparatus for rewriting parameters in accordance with claim 3, wherein the judging unit includes a weighting module and a comparing module;
the weighting module is used for weighting and calculating the read starting data;
the comparison module is used for comparing the weighting and calculation result with the value stored in the check bit in the EEPROM and judging whether the comparison result is consistent;
and the value stored by the check bit is the weighted sum of the operation setting parameters stored in the EEPROM when the equipment is powered on and is powered off last time.
6. An air conditioner comprises an MCU and an EEPROM; the EEPROM is used for storing starting data of the air conditioner; the air conditioner is characterized by further comprising a backup unit;
the MCU comprises a reading and writing unit, a judging unit and a starting unit;
the read-write unit is used for reading the starting data stored in the EEPROM after the air conditioner is powered on;
the judging unit is used for judging whether the starting data is normal or not;
the backup unit is used for backing up the starting data judged to be normal by the judging unit when the air conditioner is powered on;
when the judging unit judges that the starting data is abnormal, the reading and writing unit is also used for reading the starting data which is backed up when the judging unit judges that the air conditioner is normal when being powered on last time from the backup unit and writing the starting data into the EEPROM so as to start the air conditioner based on the backup starting data;
the starting data is operation setting parameters stored in the EEPROM when the air conditioner is powered off; when the air conditioner is powered on for the previous time, the backup starting data after the judgment of normality is written into the EEPROM, and the method specifically comprises the following steps:
reading the backup starting data after the air conditioner is judged to be normal when the air conditioner is powered on for the previous time from a storage unit of an MCU of the air conditioner;
writing the backup starting data into the EEPROM; or the like, or, alternatively,
reading the backup starting data after the air conditioner is judged to be normal when the air conditioner is powered on for the previous time from the backup area of the EEPROM;
and writing the backup starting data into the EEPROM.
7. The air conditioner of claim 6, wherein the backup unit is a storage unit of an MCU of the air conditioner; or the like, or, alternatively,
the backup unit is a backup area in the EEPROM.
8. The air conditioner according to claim 6, wherein the judging unit includes a weighting module and a comparing module;
the weighting module is used for weighting and calculating the read starting data;
the comparison module is used for comparing the weighting and calculation result with the value stored in the check bit in the EEPROM and judging whether the comparison result is consistent;
and the value stored in the check bit is the weighted sum of the operation setting parameters stored in the EEPROM when the air conditioner is powered on and is powered off last time.
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| CN108302724A (en) * | 2018-02-11 | 2018-07-20 | 四川虹美智能科技有限公司 | A kind of air-conditioner control system and method |
| CN109558083B (en) * | 2018-11-27 | 2020-08-14 | 惠科股份有限公司 | Method for preventing code from being rewritten and memory |
| CN110347430A (en) * | 2019-07-12 | 2019-10-18 | 四川虹美智能科技有限公司 | A kind of parameter of electric machine read method, apparatus and system |
| CN110865906B (en) * | 2019-11-05 | 2022-05-27 | 中国第一汽车股份有限公司 | Motor initial position angle storage method and device, vehicle and storage medium |
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