CN101025844A - Method for ensuring reliable data for tax-controlling device - Google Patents
Method for ensuring reliable data for tax-controlling device Download PDFInfo
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- CN101025844A CN101025844A CN 200610042477 CN200610042477A CN101025844A CN 101025844 A CN101025844 A CN 101025844A CN 200610042477 CN200610042477 CN 200610042477 CN 200610042477 A CN200610042477 A CN 200610042477A CN 101025844 A CN101025844 A CN 101025844A
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Abstract
This invention discloses a method to guarantee reliability of the data of a tax control device. The technical program is unique: two independent data storage chips (FLASH1, FLASH2) for data storage and backup of each other are sent in the device MCU, the important data is stored as two copies by each independent chips, and all data are check out by using CRC to test the accuracy. When damaged partly or wholly, an independent data storage chip can automatically read data of another one to ensure data reliability.
Description
Technical field the present invention relates to the tax-controlling device technical field of memory, relates in particular to a kind ofly can guarantee the reliable method of data for tax-controlling device.
Background technology is widely used tax-control cash register, The Design of Tax Controled Device, fiscal printer, silver-colored tax all-in-one and data black box or the like tax-controlling device on market at present, though title is slightly variant, but its purposes all is the same, it all is the important tool of national collection, thereby the reliability of data for tax-controlling device becomes the vital performance index of tax-controlling device, also is country, enterprise, user's questions of common interest.For improving the reliability of data for tax-controlling device, those skilled in the art of the present technique are inquiring in earnest and are studying, wherein Chinese patent application number is: the disclosed technical scheme of 200410024296 patent of invention is exactly to adopt the method for software ECC verification dynamic assignment storage area to improve the reliability of data for tax-controlling device, present this method also is the method that everybody generally adopts, the method can guarantee the reliability of data for tax-controlling device to a great extent, but also have tangible weak point: after the FLASH physical damage of storage data, data will all be damaged (1); (2) because storage area is that dynamic assignment is not fixed, inquiry, analysis data will be searched the sector state mapping map earlier, and relatively how therefore trouble overcome the deficiency that prior art exists, guaranteeing the reliable of data for tax-controlling device, also is the problem that those skilled in the art of the present technique need to be resolved hurrily.
Summary of the invention goal of the invention of the present invention is to be to overcome the deficiencies in the prior art and a kind ofly backuping each other and set up checking data by two independent data storeies are set of providing can guarantee the method for data reliability.
Goal of the invention of the present invention is also by external and include battery and give data SRAM storage chip power supply mode, guarantees that data do not lose and guarantee the reliable method of data.
Goal of the invention of the present invention is achieved by following technical solution: a kind ofly can guarantee the reliable method of data for tax-controlling device, its special character be provided with on the central processing unit (MCU) at tax-controlling device two independently pin-saving chip (FLASH1, FLASH2) be used to store data and backup each other, important data each independently pin-saving chip respectively store two parts, total data is carried out verification with the CRC sign indicating number, detect the correctness of data; When one independently pin-saving chip partly or entirely damage, can read another independently data of pin-saving chip automatically, to guarantee the reliable of data.
For further realizing goal of the invention of the present invention, the reliable method of data for tax-controlling device that can guarantee of the present invention is: also be provided with on the central processing unit of tax-controlling device (MCU) two independently SRAM storage chip (SRAM1, SRAM2) be used to store data and backup each other, powered on moment in key carries out the signal blockade, read and write each sheet independently the SRAM storage chip must check password, even so that be interfered, can not destroy data wherein yet; Adopt different feed circuit to give two independently SRAM storage chip power supplies, external connection battery is given the power supply of SRAM1 storage chip, SRAM2 adopts the inner mode that contains battery to power, even external cell or feed circuit damage, still can guarantee that the data among the SRAM2 do not lose, make data true and reliable.
The present invention compared with prior art has following outstanding substantive distinguishing features and obvious improvement: the first since the present invention by be provided with two independently pin-saving chip be used to store data and backup each other, important data each independently pin-saving chip respectively store two parts, total data is carried out verification with the CRC sign indicating number, to detect the correctness of data, thereby guaranteed the reliable of data, compared with prior art, the reliability of data for tax-controlling device is further improved; Its two be the present invention also by on the central processing unit (MCU) of tax-controlling device, be provided with two independently SRAM storage chip (SRAM1, SRAM2) be used to store data and backup each other, powered on moment in key carries out the signal blockade, read and write each sheet independently the SRAM storage chip must check password, thereby guarantee that in read-write all can be by data during each data the CRC16 sign indicating number finds out correct data from 2 or 4 backed up data, not only data sector determines that read-write is fairly simple, and makes the reliability of data for tax-controlling device that sufficient safeguard measure arranged; It three is also to adopt external connection battery to give SRAM1 storage chip power supply in the technical scheme of the present invention, the SRAM2 storage chip is powered with internal cell, can guarantee so no matter which kind of feed circuit damages, all the time guaranteeing has one road feed circuit intact, guarantee that the data in the SRAM storage chip do not lose, data are true and reliable, so technical solutions according to the invention have application value preferably.
A kind of reliable method of data for tax-controlling device that can guarantee of description of drawings the present invention is provided by the following drawings.
Fig. 1 is a kind of block diagram that can guarantee the reliable method of data for tax-controlling device of the present invention.
Embodiment describes a kind of design proposal that can guarantee the reliable method of data for tax-controlling device of the present invention in detail below in conjunction with accompanying drawing.
Embodiment is a kind of to be guaranteed the reliable method of data for tax-controlling device (referring to accompanying drawing 1) it is to adopt following technical scheme: central processing unit 1 (MCU) bottom of tax-controlling device is connected with respectively separately independently by circuit that pin-saving chip 2 (FLASH1) and pin-saving chip 3 (FLASH2) are used to store data.In the program software of the central processing unit 1 (MCU) of tax-controlling device with two separately independently the data of pin-saving chip 2 (FLASH1) and pin-saving chip 3 (FLASH2) storage backup each other, important data each independently pin-saving chip respectively store two parts, total data is carried out verification with the CRC sign indicating number, to detect the correctness of data.When one independently pin-saving chip partly or entirely damage, can read another independently data of pin-saving chip automatically, to guarantee the reliable of data.Central processing unit 1 (MCU) top of tax-controlling device connects separately independently SRAM storage chip 4 (SRAM2) and storage chip 6 (SRAM1) by circuit, be used to store data and backup each other, powered on moment in key carries out the signal blockade, read and write each sheet independently the SRAM storage chip must check password, even be interfered, can not destroy data wherein yet; Adopt different feed circuit to give two independently SRAM storage chip power supplies, external connection battery 7 gives the SRAM1 storage chip 6 power supplies, SRAM2 storage chip 4 adopts the inner mode that contains battery 5 to power, even external cell or feed circuit damage, still can guarantee that the data among the SRAM2 do not lose, make data true and reliable.The specific implementation method is as follows:
(1) at system's powered on moment, block chip selection signal CS1, the CS2 of SRAM storage chip, make it can not be selected; Blocking WR3, WR4 makes it not accessed; WR1, WR2 are designed to the mode of password access, and necessary verification password has only password correctly just can carry out read or write operation before reading and writing data.
During (2) to data storage chip FLASH operation write operation, data are added that the CRC-16 verification writes among pin-saving chip 2 (FLASH1), 3 (FLASH2) simultaneously and check and write whether success, guarantee that data are correct in the process that writes by retaking of a year or grade; During reading of data, the correctness of coming recognition data by CRC-16 sign indicating number in the data is found out correct data from 2 or 4 backups.
When (3) writing the SRAM storage chip, check the password of SRAM storage chip earlier, with the same area of deposit data at different SRAM storage chips, operation locks after having write; During reading of data, the also first password of nuclear SRAM storage chip is found out correct data by CRC-16 sign indicating number in the data from 2 or 4 backups.
(4) external connection battery 7 powers to SRAM storage chip 6 (SRAM1), battery 5 power supplies are contained in storage chip 4 (SRAM2) storage chip inside, even external cell 7 or feed circuit damage like this, still can guarantee that the data in the SRAM storage chip do not lose, further improve the reliability of data for tax-controlling device.
Claims (2)
1, a kind ofly can guarantee the reliable method of data for tax-controlling device, it is characterized in that being provided with on the central processing unit (MCU) at tax-controlling device two independently pin-saving chip (FLASH1, FLASH2) be used to store data and backup each other, important data each independently pin-saving chip respectively store two parts, total data is carried out verification with the CRC sign indicating number, to detect the correctness of data; When one independently pin-saving chip partly or entirely damage, can read another independently data of pin-saving chip automatically, to guarantee the reliable of data.
2, according to claim 1ly can guarantee the reliable method of data for tax-controlling device, it is characterized in that on the central processing unit (MCU) of described tax-controlling device, also be provided with two independently SRAM storage chip (SRAM1, SRAM2) be used to store data and backup each other, powered on moment in key carries out the signal blockade, read and write each sheet independently the SRAM storage chip must check password, even so that be interfered, can not destroy data wherein yet; Adopt different feed circuit to give two independently SRAM storage chip power supplies, external connection battery is given the power supply of SRAM1 storage chip, SRAM2 adopts the inner mode that contains battery to power, even external cell or feed circuit damage, still can guarantee that the data among the SRAM2 do not lose, make data true and reliable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610042477 CN101025844A (en) | 2006-02-17 | 2006-02-17 | Method for ensuring reliable data for tax-controlling device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200610042477 CN101025844A (en) | 2006-02-17 | 2006-02-17 | Method for ensuring reliable data for tax-controlling device |
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| CN101025844A true CN101025844A (en) | 2007-08-29 |
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| CN 200610042477 Pending CN101025844A (en) | 2006-02-17 | 2006-02-17 | Method for ensuring reliable data for tax-controlling device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102968861A (en) * | 2010-03-10 | 2013-03-13 | 航天信息股份有限公司 | Tax copying method |
| CN104407943A (en) * | 2014-12-09 | 2015-03-11 | 武汉虹信通信技术有限责任公司 | Method for self-diagnosis recovery of remote radio-frequency unit based on all-optical distribution system |
| CN105761390A (en) * | 2014-12-16 | 2016-07-13 | 航天信息股份有限公司 | Tax control module and fiscal cash register |
| CN110062008A (en) * | 2019-05-21 | 2019-07-26 | 北京计算机技术及应用研究所 | Phonautograph system optimization method for software under harsh temperature conditions |
-
2006
- 2006-02-17 CN CN 200610042477 patent/CN101025844A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102968861A (en) * | 2010-03-10 | 2013-03-13 | 航天信息股份有限公司 | Tax copying method |
| CN102968861B (en) * | 2010-03-10 | 2015-07-15 | 航天信息股份有限公司 | Tax copying method |
| CN104407943A (en) * | 2014-12-09 | 2015-03-11 | 武汉虹信通信技术有限责任公司 | Method for self-diagnosis recovery of remote radio-frequency unit based on all-optical distribution system |
| CN105761390A (en) * | 2014-12-16 | 2016-07-13 | 航天信息股份有限公司 | Tax control module and fiscal cash register |
| CN110062008A (en) * | 2019-05-21 | 2019-07-26 | 北京计算机技术及应用研究所 | Phonautograph system optimization method for software under harsh temperature conditions |
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