CN103309814B - The storage means of odometry data of automobile in EEPROM - Google Patents
The storage means of odometry data of automobile in EEPROM Download PDFInfo
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- CN103309814B CN103309814B CN201310194940.4A CN201310194940A CN103309814B CN 103309814 B CN103309814 B CN 103309814B CN 201310194940 A CN201310194940 A CN 201310194940A CN 103309814 B CN103309814 B CN 103309814B
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Abstract
The storage means of odometry data of automobile in EEPROM, belongs to the technical field of memory of EEPROM.The mileage storage means that the invention solves EEPROM in existing automobile instrument can not verify data, once data change by environmental interference or lose, cannot recover; Write with a brush dipped in Chinese ink the time long, affect the problem of the operational efficiency of program.Setting Mod is stored data divided by the integer after 16; Judge whether stored data is zero divided by the remainder after 16; If non-vanishing, Mod=Mod+1; Try to achieve the value of address data memory side-play amount Addr, Addr equals (stored data-1) divided by the remainder after 16; Mod is stored in the memory address that Addr+AddrBase determines; AddrBase is base address, is the memory address of first data; After storage completes, read data Temp in Addr+AddrBase address; Carry out reading to judge, if the data of the data write and reading are inconsistent carry out the process of storage data exception.Mileage number is stored in 16 addresses by the present invention, and each unit is 62500 times by the number of times write with a brush dipped in Chinese ink, and is only 6.3% of its durable number of times.
Description
Technical field
The present invention relates to the storage means of a kind of odometry data of automobile in EEPROM, belong to the technical field of memory of EEPROM.
Background technology
Mileage on automobile instrument is concerning most important user, once mileage lose or inaccurate, to the maintenance of vehicle and after sale quality guarantee all have a great impact, along with the develop rapidly of automotive electronic technology, traditional mechanical type mileage counting all replace by electronic type mileage counting, for electronic instrument, mileage is all stored in the EEPROM in instrument, EEPROM, by the impact writing with a brush dipped in Chinese ink number of times and external electromagnetic environment, likely causes the loss of data or storage unit to damage.The EEPROM data storage generally adopted now mostly is opens up fixing unit in EEPROM, after being stored into the number of times set, open up a new unit again to store, avoiding writing with a brush dipped in Chinese ink the life-span that number of times crosses multipair EEPROM impacts, but the shortcoming of the method can not verify data, once data change by environmental interference or lose, cannot recover.In addition, the byte that the storage of data entirety takies is many, writes with a brush dipped in Chinese ink the time long, affects program operational efficiency.
The total kilometrage maximal value generally requiring instrument to store is 999999, if these data to be stored in a fixing address, mileage change once, just data to be write with a brush dipped in Chinese ink in this address once, so this address will be write with a brush dipped in Chinese ink nearly 1,000,000 times, and the life-span of writing with a brush dipped in Chinese ink of EEPROM is only 1,000,000 times.
Summary of the invention
The mileage storage means that the invention solves EEPROM in existing automobile instrument can not verify data, once data change by environmental interference or lose, the problem that cannot recover, solve data global storage to take byte many simultaneously, write with a brush dipped in Chinese ink the time long, affect the problem of program operational efficiency; And then provide the storage means of a kind of odometry data of automobile in EEPROM.
The present invention solves the problems of the technologies described above the technical scheme taked to be:
The storage means of odometry data of automobile in EEPROM, the detailed process of described storage means is:
Step one, setting Mod are stored data (odometry data of automobile) divided by the integer after 16;
Step 2, judge whether stored data is zero divided by the remainder after 16, if non-vanishing (namely stored data can not divide exactly 16) so perform step 3; If be so perform step 4 zero (namely stored data can divide exactly 16);
Step 3, Mod=Mod+1;
Step 4, try to achieve the value of address data memory side-play amount Addr, Addr equals (stored data-1) divided by the remainder after 16;
Step 5, Mod is stored in memory address that Addr+AddrBase determines; Here AddrBase is base address, is the memory address of first data;
Step 6, stored after, read data Temp in Addr+AddrBase address;
Step 7, carry out reading and judge, if the data Mod of write and the data Temp of reading is inconsistent, then perform step 8 again after carrying out the process of storage data exception; Otherwise directly perform step 8;
Step 8, complete storing process.
The invention has the beneficial effects as follows:
Mileage number is stored in 16 addresses by the inventive method, and each like this unit is 62500 times by the number of times write with a brush dipped in Chinese ink, and is only 6.3% of its durable number of times.In addition, the inventive method can verify storage mileage, under normal circumstances, the rule that the data fit in 16 data cells is certain, namely has at most the number that two kinds different in 16 data cells, different several if there is 3 kinds, confirm exception, can verify by storing rule, method of calibration is various, can using numbers maximum for occurrence number as valid data, be stored in 16 unit, also can using two of a hop place data as valid data.Meanwhile, the inventive method is judged by verification, if certain unit storing mileage damages, again will open up a continuous print 16 EEPROM unit, mileage is stored in new unit, and the data of impaired loss is recovered by verification.
After data are divided into 16 unit by the inventive method, it is relatively little that the byte length of each unit can be arranged, and only needs the data storing one of them unit at every turn, and the time stored in EEPROM data like this shortens greatly, improves the operational efficiency of program.
Accompanying drawing explanation
Fig. 1 is memorying data flow journey block diagram of the present invention, and Fig. 2 is the FB(flow block) of the storage data exception processing procedure in Fig. 1, and Fig. 3 is the FB(flow block) reading data check process.
Embodiment
Embodiment one: as shown in Figure 1, the detailed process of the storage means of a kind of odometry data of automobile in EEPROM described in present embodiment is:
Step one, setting Mod are stored data (odometry data of automobile) divided by the integer after 16;
Step 2, judge whether stored data is zero divided by the remainder after 16, if non-vanishing (namely stored data can not divide exactly 16) so perform step 3; If be so perform step 4 zero (namely stored data can divide exactly 16);
Step 3, Mod=Mod+1;
Step 4, try to achieve the value of address data memory side-play amount Addr, Addr equals (stored data-1) divided by the remainder after 16;
Step 5, Mod is stored in memory address that Addr+AddrBase determines; Here AddrBase is base address, is the memory address of first data;
Step 6, stored after, read data Temp in Addr+AddrBase address;
Step 7, carry out reading and judge, if the data Mod of write and the data Temp of reading is inconsistent, then perform step 8 again after carrying out the process of storage data exception; Otherwise directly perform step 8;
Step 8, complete storing process.
Embodiment two: as depicted in figs. 1 and 2, in present embodiment, storage data exception process in step 7 causes read-write error to distinguish the damage of EEPROM unit or being interfered, in storage data exception treatment scheme, add 8 read-writes judge, if 8 read-writes all failures, think that EEPROM unit is damaged, need again to open up a continuous print 16 EEPROM unit, mileage is stored in new unit; Detailed process is:
Step 1, i=0
Step 2, by Mod stored in Addr+AddrBase memory address;
Data Temp in step 3, reading Addr+AddrBase address;
Step 4, judge write data Mod whether consistent with the data Temp of reading, if so, execution step 10; Otherwise perform step 5;
The value of step 5, increase i;
Step 6, judge whether i is less than 8, if be back to step 2; Otherwise perform step 7;
Step 7, initial for AddrBase address 16 data are put into the address that (AddrBase+16) is start address;
Step 8, AddrBase=AddrBase+16;
Step 9, by Mod stored in Addr+AddrBase address;
Step 10, storage data exception processing procedure terminate.
Other step is identical with embodiment one.
Embodiment three: as shown in Figure 3, described in present embodiment, method also comprises step 9, and read the step of data check, its detailed process is as follows:
Step 9 (1), be start address with AddrBase, read 16 data;
Step 9 (2), inconsistent some quantity statistics is carried out to the data of step 9 (1);
Step 9 (3), judge whether inconsistent quantity is greater than 1, if it is perform step 9 (4), otherwise perform step 9 (5);
Step 9 (4), using the data of maximum consistent point as significant figure, verify data in other positions;
Step 9 (5), 16 data are added draw total kilometrage data, terminate the step reading data check.
Other step is identical with embodiment one or two.
Embodiment: memorying data flow journey illustrates:
Mod is stored data divided by the integer after 16
If data can divide exactly 16 so Mod=Mod+1;
Address data memory Addr is (data-1) divided by the remainder after 16
Be stored into by Mod in Addr+AddrBase, AddrBase is base address here, is exactly the memory address of first data.
After storage completes, carry out reading and judge, if the data of the data write and reading are inconsistent, then call and store data exception treatment scheme;
Read-write error is caused in order to distinguish the damage of EEPROM unit or be interfered, in storage data exception treatment scheme, add 8 read-writes judge, if 8 read-writes all failures, think that EEPROM unit is damaged, need from newly opening up a continuous print 16 EEPROM unit, mileage is stored in new unit.
Current mileage number is 15, then the data in 16 unit are as follows
| 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| 1 | 1 | 1 | 1 | 1 | 1 | 1 | 0 |
Current mileage number is 16, then the data in 16 unit are as follows
| 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
Current mileage number is 17, then the data in 16 unit are as follows
| 2 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
Current mileage number is 18, then the data in 16 unit are as follows
| 2 | 2 | 1 | 1 | 1 | 1 | 1 | 1 |
| 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
Find out from above data, under normal circumstances, the rule that data fit in 16 data cells is certain, namely the number that two are different is had at most in 16 data cells, different several if there is 3, confirming exception, can verify by storing rule, method of calibration is various, can, using numbers maximum for occurrence number as valid data, be stored in 16 unit, also can using two of a hop place data as valid data.
Claims (3)
1. the storage means of odometry data of automobile in EEPROM, is characterized in that: the detailed process of described storage means is:
Step one, setting Mod are odometry data of automobile divided by the integer after 16;
Step 2, judge whether odometry data of automobile is zero divided by the remainder after 16, so performs step 3 if non-vanishing; If be zero so perform step 4;
Step 3, Mod=Mod+1;
Step 4, try to achieve the value of address data memory side-play amount Addr, Addr=mod [(odometry data of automobile-1), 16];
Step 5, Mod is stored in memory address that Addr+AddrBase determines; Wherein AddrBase is base address, is the memory address of first data;
Step 6, stored after, read data Temp in Addr+AddrBase address;
Step 7, carry out reading and judge, if the data Mod of write and the data Temp of reading is inconsistent, then perform step 8 again after carrying out the process of storage data exception; Otherwise directly perform step 8;
Step 8, complete storing process.
2. the storage means of a kind of odometry data of automobile according to claim 1 in EEPROM, it is characterized in that: the storage data exception process in step 7 causes read-write error to distinguish the damage of EEPROM unit or being interfered, in storage data exception treatment scheme, add 8 read-writes judge, if 8 read-writes all failures, think that EEPROM unit is damaged, again open up a continuous print 16 EEPROM unit, odometry data of automobile is stored in new unit; Detailed process is:
Step 1, i=0
Step 2, by Mod stored in Addr+AddrBase memory address;
Data Temp in step 3, reading Addr+AddrBase address;
Step 4, judge write data Mod whether consistent with the data Temp of reading, if so, execution step 10; Otherwise perform step 5;
Step 5, i=i+1;
Step 6, judge whether i is less than 8, if be back to step 2; Otherwise perform step 7;
Step 7, initial for AddrBase address 16 data are put into the address that AddrBase+16 is start address;
Step 8, AddrBase=AddrBase+16;
Step 9, by Mod stored in Addr+AddrBase address;
Step 10, storage data exception processing procedure terminate.
3. the storage means of a kind of odometry data of automobile according to claim 1 and 2 in EEPROM, is characterized in that: described method also comprises step 9, and read the step of data check, its detailed process is as follows:
Step 9 (1), be start address with AddrBase, read 16 data;
Step 9 (2), inconsistent some quantity statistics is carried out to the data of step 9 (1);
Step 9 (3), judge whether inconsistent quantity is greater than 1, if it is perform step 9 (4), otherwise perform step 9 (5);
Step 9 (4), using the data of maximum consistent point as significant figure, verify data in other positions;
Step 9 (5), 16 data are added draw odometry data of automobile, terminate the step reading data check.
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| CN201310194940.4A CN103309814B (en) | 2013-05-23 | 2013-05-23 | The storage means of odometry data of automobile in EEPROM |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104978534A (en) * | 2014-04-11 | 2015-10-14 | 大陆汽车车身电子系统（芜湖）有限公司 | Method and system for preventing vehicle mileage tampering |
| CN105741881A (en) * | 2016-01-28 | 2016-07-06 | 浙江绍兴苏泊尔生活电器有限公司 | Storage verification method for static storage area |
| CN112380059B (en) * | 2020-11-13 | 2024-02-23 | 武汉蓝星科技股份有限公司 | Method and system for storing mileage information of vehicle instrument |
| CN112667433B (en) * | 2021-01-27 | 2022-06-17 | 安徽天健环保车辆部件有限公司 | Data calibration deviation correction method for mileage of automobile instrument |
| CN113010118B (en) * | 2021-03-25 | 2022-09-16 | 四川百纳科技有限责任公司 | Method for processing mileage and hour meter data stored in automobile |
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| CN102043722A (en) * | 2010-12-30 | 2011-05-04 | 重庆长安汽车股份有限公司 | Automobile total mileage storage method |
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| JP2004062328A (en) * | 2002-07-25 | 2004-02-26 | Renesas Technology Corp | Flash storage medium loading nand-type flash memory |
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| CN102043722A (en) * | 2010-12-30 | 2011-05-04 | 重庆长安汽车股份有限公司 | Automobile total mileage storage method |
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