CN104091616A - Method for detecting data consistency of set top box built-in flash chip - Google Patents
Method for detecting data consistency of set top box built-in flash chip Download PDFInfo
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Abstract
The invention discloses a method for detecting data consistency of a set top box built-in flash chip. The method includes the steps: acquiring a first cyclic redundancy check code corresponding to original data of each partition in a flash chip burning process; calculating a second cyclic redundancy check code corresponding to data of each partition in a flash chip storage space; and judging whether the first cyclic redundancy check code is consistent with the second cyclic redundancy check code, if yes, the data of each partition of the flash chip is consistent with the burnt original data, and if no, the data of each partition of the flash chip is inconsistent with the burnt original data. With application of the method of the invention, the data can be detected after the flash chip is integrated into a set-top box mainboard, and whether the data stored in the flash chip is consistent and complete compared with the burnt data is judged.
Description
Technical field
The present invention relates to Set Top Box and produce and detection technique field, particularly relate to the built-in flash chip data of a kind of Set Top Box consistency detecting method.
Background technology
Set Top Box (STB, Set Top Box digital video switching box), is the equipment of the display device such as a kind of connecting TV machine and outside source, and it can change into the digital signal of compression television content, and shows in display device.
Under normal circumstances, Set Top Box in process of production, to assembling complete Set Top Box, can detect.For example current, can detect Set Top Box peripheral hardware interface by test procedure, for example USB interface, network interface, audio and video output interface etc., judge that whether peripheral hardware interface function is normal.
At present, along with the development of software development technique, the built-in flash storage chip of Set Top Box also can pass through the certain system file of cd-rom recorder programming, application supervisor data, thereby can make Set Top Box provide many services to user.In the programming of flash chip after routine data, by flash chip paster to set top box main, on production line, needing high temperature to cross stove welds various components and parts on mainboard, now the routine data in flash chip may destroyed (especially NAND Flash) under hot environment, while causing follow-up Set Top Box follow-up operation, there are various uncertain abnormal conditions, as lacked menu, deadlock under application interface, and a lot of hidden problem.Therefore, need to detect the consistance of built-in flash chip data in Set Top Box production run, judge that whether the built-in flash chip of Set Top Box is to be integrated into data after mainboard complete, consistent with the raw data of programming.But in current testing process, do not provide flash chip data conforming detection.
Summary of the invention
Based on this, be necessary to provide the built-in flash chip data of a kind of Set Top Box consistency detecting method, can, at flash integrated chip after set top box main, its data be detected, the data that judge flash chip-stored whether compared with the data of programming whether one make peace complete.
The built-in flash chip data of a kind of Set Top Box consistency detecting method, is characterized in that, described method comprises:
Obtain the superfluous She's check code of the first circulation corresponding to each subregion raw data in described flash chip programming process;
Calculate the superfluous She's check code of the second circulation corresponding to each partition data in described flash chip-stored space;
Judge that whether the superfluous She's check code of described the first circulation is consistent with the superfluous She's check code of described the second circulation;
If so, the each partition data of described flash chip is consistent with the raw data of programming, otherwise inconsistent.
In one embodiment, described method also comprises:
After the each subregion programming of described flash chip raw data, and while described flash integrated chip not being arrived to Set Top Box, calculate the superfluous She's check code of the first circulation corresponding to the each subregion raw data of described flash chip, and store the superfluous She's check code of described the first circulation into described flash chip.
In one embodiment, the each subregion raw data of the described flash chip of described calculating corresponding first circulation superfluous She's check code step, comprising:
The scale-of-two image file producing in programming raw data process according to non-file layout subregion and read-only file form subregion, adopts the superfluous She's algorithm of circulation, generates the corresponding superfluous She's check code of the first circulation;
According to the scale-of-two image file of predefine file in read-write file layout subregion, adopt the superfluous She's algorithm of circulation, generate the corresponding superfluous She's check code of the first circulation.
In one embodiment, the described step that the superfluous She's check code of described the first circulation is stored into described flash chip, comprising:
The superfluous She's check code of described the first circulation is stored into the sequence number subregion of described flash chip.
In one embodiment, the step of the superfluous She's check code of the second circulation that each partition data in the described flash chip-stored of described calculating space is corresponding, comprising:
According to the scale-of-two image file of non-file layout subregion and read-only file form partition data, adopt the superfluous She's algorithm of circulation, generate the corresponding superfluous She's check code of the second circulation;
According to the scale-of-two image file of predefine file in read-write file layout subregion, adopt the superfluous She's algorithm of circulation, generate the corresponding superfluous She's check code of the second circulation.
In one embodiment, after the raw data of judging described flash chip each partition data and programming is consistent, described method also comprises:
To sequence number corresponding to Set Top Box described in the programming of described sequence number subregion.
The built-in flash chip data of above-mentioned Set Top Box consistency detecting method, in flash chips welding after set top box main, in trace routine, first obtain the superfluous She's check code of the first circulation corresponding to each subregion raw data in flash chip programming process, calculate again the superfluous She's check code of the second circulation corresponding to each partition data in flash chip-stored space, afterwards the superfluous She's check code of the first circulation and the superfluous She's check code of the second circulation are compared, judge whether consistent, if consistent, the each partition data of flash chip is consistent with the raw data of programming, technique scheme thus, realize at flash integrated chip after set top box main, its data are detected, the data that judge flash chip-stored whether compared with the data of programming whether one make peace complete.
Brief description of the drawings
Fig. 1 is the schematic flow sheet of the built-in flash chip data of the Set Top Box in an embodiment consistency detecting method;
Fig. 2 is the schematic flow sheet of the built-in flash chip data of the Set Top Box in an embodiment consistency detecting method.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
Referring to Fig. 1, provide the built-in flash chip data of a kind of Set Top Box consistency detecting method at an embodiment.The method can be applied in factory's Set Top Box production run, be specially when programming in advance the flash integrated chip (welding) of routine data after set top box main, data to flash chip detect, and judge that whether data are consistent with the raw data of programming.The method comprises:
Step 101, obtains the superfluous She's check code of the first circulation corresponding to each subregion raw data in flash chip programming process.
Concrete, adopt in the present embodiment CRC (Cyclic Redundancy Check, superfluous She's verification circulates) proof of algorithm flash integrated chip whether consistent with the raw data of programming to the data after set top box main.CRC is a kind of error checking and correction mode, as more reliable in parity checking with respect to other verification mode, it is characterized in that the length of information field and check field can be selected arbitrarily.The principle of CRC check is: at k position information code splicing R bit check code, whole code length is N, and CRC coding is also referred to as (N, k) code.For one (N, k) code, there is the polynomial expression G (x) that high order power is R.Can generate the check code of k position information according to G (x), G (x) is called the generator polynomial of CRC code.The concrete generative process of check code is: establish the Information Availability polynomial expression C (x) that will send and represent, by C (x) the R position that moves to left, make the right of C (x) vacate the position of R bit check code.With C (x) 2
rthe remainder obtaining divided by generator polynomial G (x) is exactly check code.Generator polynomial can, with the binary number representation of an agreement, remain unchanged in whole checking procedure.
Under normal circumstances, in software development process, flash chip is divided into multiple subregions according to different software functions in advance, comprises file system format subregion and non-file system format subregion, and file system format subregion can be divided into again read-only file system subregion and read-write file partition.Above-mentioned subregion, as passed through cd-rom recorder programming original program data in boot subregion, system kernel subregion, application partition etc., can calculate in advance the superfluous She's check code of the first circulation corresponding to original program data by computing machine, and the superfluous She's check code of this first circulation is written in flash chip.
When flash integrated chip is after set top box main, only test the test process of peripheral hardware interface with respect to prior art, can in test pattern procedure, increase by a flash chip data consistency detection function.In its relevant operation process, first obtain the superfluous She's check code of the first circulation corresponding to each subregion raw data flash chip programming process from predetermined memory address.
Step 102, calculates the superfluous She's check code of the second circulation corresponding to each partition data in flash chip-stored space.
Concrete, in flash chip high-temperature soldering, in the process of set top box main, in flash chip, data may change.Test pattern procedure, according to the data of the each subregion in flash chip-stored space, is calculated the corresponding superfluous She's code of the second circulation.
Step 103, judges that the superfluous She's check code of the first circulation is consistent with the superfluous She's check code of the second circulation.
Concrete, the superfluous She's check code of the first circulation is compared with the superfluous She's check code of the second circulation, judge whether unanimously, if unanimously perform step 104, otherwise execution step 105.
Step 104, judges that the each partition data of flash chip is consistent with the raw data of programming.
Step 105, judges that the raw data of the each partition data of flash chip and programming is inconsistent.
Referring to Fig. 2, provide in another embodiment the built-in flash chip data of a kind of Set Top Box consistency detecting method.The method relate to the programming of flash chip data and at flash integrated chip to the process detecting after set top box main.The method comprises flow process:
Step 201, after the each subregion programming of flash chip raw data, and by flash integrated chip when the Set Top Box, calculate the superfluous She's check code of the first circulation corresponding to the each subregion raw data of flash chip.
Concrete, flash chip is divided into multiple subregions according to different software functions, comprises file system format subregion and non-file system format subregion, and file system format subregion can be divided into again read-only file system subregion and read-write file partition.In prior art, write corresponding original program data by cd-rom recorder to each subregion, can generate scale-of-two image file corresponding to each original program data, and store in each subregion.Due to the unique corresponding relation of scale-of-two image file and each subregion original program data, and scale-of-two image file volume is little, therefore calculating the superfluous She's check code of the first circulation corresponding to the each subregion raw data of flash chip can calculate for scale-of-two image file, is divided into two kinds:
The first, the scale-of-two image file producing in programming raw data process according to non-file layout subregion and read-only file form subregion, adopts the superfluous She's algorithm of circulation, generates the corresponding superfluous She's check code of the first circulation.Non-file layout subregion and read-only file form subregion, as boot subregion, system kernel subregion etc., the data of these subregions can not be revised under normal circumstances, therefore by CRC algorithm, directly calculate the superfluous She's check code of circulation corresponding to scale-of-two image file of these subregions.
The second, according to the scale-of-two image file of predefine file in read-write file layout subregion, adopts the superfluous She's algorithm of circulation, generates the corresponding superfluous She's check code of the first circulation.Read-write file system format subregion, as file partition, application partition etc., can adopt yaffs or ubifs form as image file conventionally, in the time that follow-up Set Top Box is moved by test macro, and can real time modifying its data.But in test pattern, normally test to mainboard in flash chips welding, therefore in read-write file layout subregion data also can think major part do not change (normally can by test situation under).Just can select the scale-of-two image file to predefined critical file in file in read-write file system format subregion, adopt CRC algorithm to calculate the superfluous She's check code of corresponding circulation, verify, wherein predefined critical file can be that library file, system are moved required picture resource file etc.
Step 202, stores the superfluous She's check code of the first circulation into flash chip.
Concrete, calculate after the superfluous She's code of the first circulation by abovementioned steps 201, the superfluous She's code character of the first circulation bag can be stored in flash chip.Processing mode is as follows:
(1) the crc value group packet mode calculating for non-file system format subregion or read-only file system form subregion is: flash zone name+CRC check mode+subregion mirror image size+crc value.
Wherein, the flash subregion concrete flash zone name of carrying out CRC calculating of describing by name.CRC check mode is carried out mark with numerical value 1, in order to indicate CRC check mode.Subregion mirror image size is the scale-of-two image file size that this partition data is corresponding, the data length while calculating as CRC.Crc value: the superfluous She's check code of the first circulation calculating for this subregion scale-of-two image file.
(2) the CRC group packet mode calculating for read-write file system format subregion is: flash zone name+CRC check mode+total number of files+filename 1+ file path 1+ file crc value 1+ filename 2+ file path 2+ file crc value 2+...+ filename n+ file path n+ file crc value n.
Wherein, the flash subregion concrete flash zone name of carrying out CRC calculating of describing by name.Numerical value 2 marks for CRC check mode (distinguishing with numerical value 1), in order to indicate CRC check mode.Total number of files is the total number of files that in this flash subregion, predefine is carried out CRC check.The file concrete filename that carries out CRC check by name.File path is to describe the concrete path, file place of carrying out CRC check.File crc value: the superfluous She's check code of the first circulation calculating for this file.
(3) above-mentioned two kinds of modes are assemblied into binary file (crc.bin) to the superfluous She's check code of the first circulation of each partition data, this file is conventionally smaller, is less than 64KB.
(4) crc.bin file is stored in flash chip.In Set Top Box flash subregion, conventionally there is a sequence number subregion stbid, for depositing sequence number of set top box partition data.In the time of flash burning chip data, this subregion stbid.bin is the data file of a full OxFF, size is generally 64KB or 128KB, therefore can be there is to the ad-hoc location in stbid.bin in the data in crc.bin, as: stbid.bin file starts to store the data crc.bin from the place of skew file header 1KB.Thus, do not need newly-increased extra flash subregion just crc.bin can be stored in flash subregion.Simultaneously, from starting to be offset certain length, stbid.bin file header stores crc.bin, do not affect the program judgement to stbid partition data originally, under normal circumstances, set-top-box opening reads a bit of data of stbid partition start after starting, as tens bytes, if be 0xFF entirely, represent also writing sequence number not of Set Top Box, program can jump to factory testing interface and carry out the operation of programming serial number of set-top box.
Step 203, obtains the superfluous She's check code of the first circulation corresponding to each subregion raw data in flash chip programming process.
Concrete, when flash integrated chip is after set top box main, can in test pattern procedure, increase by a flash chip data consistency detection function.In its relevant operation process, first obtain the superfluous She's check code of the first circulation corresponding to each subregion raw data flash chip programming process from predetermined memory address.Its processing procedure is: read the crc.bin data in stbid subregion, and resolve, obtain the superfluous She's check code of the first circulation that scale-of-two image file corresponding to each subregion raw data is corresponding.
Step 204, calculates the superfluous She's check code of the second circulation that the each partition data in flash chip-stored space is corresponding.
Concrete, in test process, again calculate the superfluous She's check code of the second circulation corresponding to scale-of-two image file of each partition data, the computation process of its computation process and the superfluous She's check code of the first circulation is similar, does not repeat them here.
Step 205, judges that whether the superfluous She's check code of the first circulation is consistent with the superfluous She's check code of the second circulation.
Concrete, the superfluous She's check code of the first circulation is compared with the superfluous She's check code of the second circulation, judge whether unanimously, if unanimously perform step 206, otherwise execution step 207.
Step 206, judges that the each partition data of flash chip is consistent with the raw data of programming.
Concrete, when judging that the each partition data of flash chip is consistent with the raw data of programming, can redirect execution step 208.
Step 207, judges that the raw data of the each partition data of flash chip and programming is inconsistent.
Concrete, if inconsistent, can point out not by test.Need to be to flash chip again programming routine data.
Step 208, writes sequence number corresponding to Set Top Box to flash chip serial number subregion.
Concrete, by test, to flash chip serial number subregion burning serial number of set-top box, now, and can be by the data dump of subregion crc.bin in stbid, preserve new burned sequence number of set top box data.
The built-in flash chip data of Set Top Box consistency detecting method in above-described embodiment, in flash chips welding after set top box main, in trace routine, first obtain the superfluous She's check code of the first circulation corresponding to each subregion raw data in flash chip programming process, calculate again the superfluous She's check code of the second circulation corresponding to each partition data in flash chip-stored space, afterwards the superfluous She's check code of the first circulation and the superfluous She's check code of the second circulation are compared, judge whether consistent, if consistent, the each partition data of flash chip is consistent with the raw data of programming, technique scheme thus, realize at flash integrated chip after set top box main, its data are detected, the data that judge flash chip-stored whether compared with the data of programming whether one make peace complete.
The above embodiment has only expressed several embodiment of the present invention, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (6)
1. the built-in flash chip data of a Set Top Box consistency detecting method, is characterized in that, described method comprises:
Obtain the superfluous She's check code of the first circulation corresponding to each subregion raw data in described flash chip programming process;
Calculate the superfluous She's check code of the second circulation corresponding to each partition data in described flash chip-stored space;
Judge that whether the superfluous She's check code of described the first circulation is consistent with the superfluous She's check code of described the second circulation;
If so, the each partition data of described flash chip is consistent with the raw data of programming, otherwise inconsistent.
2. method according to claim 1, is characterized in that, described method also comprises:
After the each subregion programming of described flash chip raw data, and while described flash integrated chip not being arrived to Set Top Box, calculate the superfluous She's check code of the first circulation corresponding to the each subregion raw data of described flash chip, and store the superfluous She's check code of described the first circulation into described flash chip.
3. method according to claim 2, is characterized in that, the each subregion raw data of the described flash chip of described calculating corresponding first circulation superfluous She's check code step, comprising:
The scale-of-two image file producing in programming raw data process according to non-file layout subregion and read-only file form subregion, adopts the superfluous She's algorithm of circulation, generates the corresponding superfluous She's check code of the first circulation;
According to the scale-of-two image file of predefine file in read-write file layout subregion, adopt the superfluous She's algorithm of circulation, generate the corresponding superfluous She's check code of the first circulation.
4. method according to claim 3, is characterized in that, the described step that the superfluous She's check code of described the first circulation is stored into described flash chip, comprising:
The superfluous She's check code of described the first circulation is stored into the sequence number subregion of described flash chip.
5. method according to claim 4, is characterized in that, the step of the superfluous She's check code of the second circulation that each partition data in the described flash chip-stored of described calculating space is corresponding, comprising:
According to the scale-of-two image file of non-file layout subregion and read-only file form partition data, adopt the superfluous She's algorithm of circulation, generate the corresponding superfluous She's check code of the second circulation;
According to the scale-of-two image file of predefine file in read-write file layout subregion, adopt the superfluous She's algorithm of circulation, generate the corresponding superfluous She's check code of the second circulation.
6. method according to claim 5, is characterized in that, after the raw data of judging described flash chip each partition data and programming is consistent, described method also comprises:
To sequence number corresponding to Set Top Box described in the programming of described sequence number subregion.
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Application publication date: 20141008 |