CN101814009B - Flash device, data storage system and method for transmitting special command to flash device - Google Patents
Flash device, data storage system and method for transmitting special command to flash device Download PDFInfo
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- CN101814009B CN101814009B CN2009100466176A CN200910046617A CN101814009B CN 101814009 B CN101814009 B CN 101814009B CN 2009100466176 A CN2009100466176 A CN 2009100466176A CN 200910046617 A CN200910046617 A CN 200910046617A CN 101814009 B CN101814009 B CN 101814009B
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Abstract
The invention provides a flash device, a data storage system and a method for transmitting a special command to the flash device. In an embodiment, the flash device is coupled with a host, the flash device comprises a flash and a controller, wherein the flash stores multiple files and a command-code correspondence table, each file has a corresponding number, the command-code correspondence table records the correspondence relationships between multiple codes and multiple commands, and each code comprises multiple numbers. The controller receives a series of access commands from the host. When the access commands instruct to access multiple files, the controller orderly generates multiple numbers corresponding to files to be accessed by the access commands to form a numeric string, converts the numeric string into multiple corresponding special commands based on the command-code correspondence table, and executes corresponding operation based on the special commands.
Description
Technical field
The invention relates to storer, particularly relevant for flash memory (flash memory).
Background technology
Flash memory is a kind ofly can and remove the non-volatility memorizer of its data by electricity programming.Flash memory is mainly used to do storage card and USB (universal serial bus), and (Universal Serial Bus, USB) device is for the general data storage of computer and other digital products.(Electrically-Erasable Programmable Read-Only Memory, cost EEPROM) therefore become the main product on the market to the manufacturing cost of flash memory far below electric erasable programmable read only memory.The range of application of flash memory comprises palmtop computer (PDA), notebook computer, digital music player, digital camera and mobile phone.
Generally speaking, flash memory be contained in one independently in the data storage device for storing data, this data storage device is referred to as flash memory device, for example aforesaid storage card.Flash memory device is couple on the main frame again, thinks that this main frame stores data, and wherein this main frame can be computer, digital camera or digital music player.When main frame needed the access flash memory, main frame directly sent a command to flash memory device, again the order access flash memory of being received by main frame by the controller foundation of flash memory device.
Yet for various reasons, main frame necessarily requires flash memory device to carry out the special action with specific function sometimes.For example, manufacturer is detected for the flash memory device product to firm output, and starts the selftest function of flash memory device.Lift an example again, manufacturer is in order to get rid of sending the flash memory device product of repairing to carry out fault, and starts the self-regeneration function of flash memory device.Because in the ordinary course of things, flash memory device can't be carried out this type of specific function, so main frame must be via improper pattern transmission order to flash memory, to avoid the execution of flash memory in wrong at ordinary times startup special action.Therefore, need a kind of method that transmits special command to flash device, so that flash memory device is carried out corresponding special action according to special command.
Summary of the invention
In view of this, the object of the present invention is to provide a kind of method that transmits special command to flash device, to solve the problem that prior art exists.In an embodiment, this flash memory device couples mutually with a main frame.At first, store a plurality of files in this flash memory device, each these file has a corresponding numeral.Then, store an order-Fu sign indicating number corresponding tables in this flash memory device, wherein should a plurality of symbol sign indicating numbers of order-Fu sign indicating number corresponding tables record and the corresponding relation of a plurality of orders, and each these symbol yard is formed by a plurality of digital.Then, when a plurality of special commands are sent in this main frame tendency to develop to this flash memory device, make this main frame send a succession of access command of these files of access to this flash memory device.Then, make this flash memory device produce a plurality of numerals of the file correspondence of these access command institute accesses in regular turn, and form one first numeric string.Then make this flash memory device change this numeric string and be corresponding a plurality of special commands according to this order-Fu sign indicating number corresponding tables.At last, make this flash memory device carry out corresponding action according to these special commands.
The invention provides a kind of flash memory device.In an embodiment, this flash memory device couples mutually with a main frame, and this flash memory device comprises a flash memory (flash memory) and a controller.The a plurality of files of this flash memory stores, and store an order-Fu sign indicating number corresponding tables, wherein each these file has a corresponding numeral, the corresponding relation of a plurality of symbol sign indicating numbers of this order-Fu sign indicating number corresponding tables record and a plurality of orders, and each these symbol sign indicating number is made up of a plurality of numerals.This controller receives a succession of access command from this main frame, when these access commands are these files of access, produce the pairing a plurality of numerals of file of these access command institute accesses in regular turn and form a numeric string, change this numeric string according to this order-Fu sign indicating number corresponding tables and be corresponding a plurality of special commands, and carry out corresponding action according to these special commands.
The present invention more provides a kind of data storage system.In an embodiment, this data storage system comprises a main frame and a flash memory device.When a plurality of special command to a flash memory device was sent in this main frame tendency to develop, this main frame sent a succession of access command of a plurality of files of access to this flash memory device, and wherein each these file has a corresponding numeral.This flash memory device stores these files and an order-Fu sign indicating number corresponding tables, produce in regular turn these access command institute accesses the file correspondence a plurality of numerals and form one first numeric string, change this numeric string according to this order-Fu sign indicating number corresponding tables and be corresponding a plurality of special commands, and carry out corresponding action according to these special commands.Wherein should order-Fu sign indicating number corresponding tables the corresponding relation of a plurality of symbol sign indicating numbers of record and a plurality of orders, and each these symbol sign indicating number is formed by a plurality of digital.
Description of drawings
For above-mentioned purpose of the present invention, feature and advantage can be become apparent, below in conjunction with accompanying drawing the specific embodiment of the present invention is elaborated, wherein:
Figure l is the block diagram according to data storage system of the present invention;
Fig. 2 is the process flow diagram according to the method for identification flash memory device of the present invention;
The embodiment of the numeral of Fig. 3 A display file 0～N correspondence;
Fig. 3 B shows the embodiment according to order of the present invention-Fu sign indicating number corresponding tables;
Fig. 4 is the process flow diagram that sends the method for special command according to main frame of the present invention; And
Fig. 5 is the process flow diagram according to the method for flash memory device decipher special command of the present invention.
The main element symbol description:
(Fig. 1)
100～data storage system;
102～main frame;
104～flash memory device;
106～controller;
108～flash memory; And
110～block
112,103～order-Fu sign indicating number corresponding tables.
Embodiment
Fig. 1 is the block diagram according to data storage system 100 of the present invention.Data storage system 100 comprises main frame 102 and flash memory device 104.In an embodiment, main frame 102 is a computer, and flash memory device 104 is a storage card.Flash memory device 104 comprises controller 106 and flash memory 108.Flash memory 108 stores a plurality of file 0～N, and each these files 0～N has a corresponding numeral.In an embodiment, file 0～file N all is stored in the block (block) of flash memory 108.The embodiment of the numeral of Fig. 3 A display file 0～N correspondence.File 0, file 1, file 2 ..., file 8, file 9 correspond respectively to numeral 0,1,2 ..., 8,9.Therefore, file 0～9 can completely correspond to all numerals 0～9 of the decimal system.
The data access of controller 106 control flash memories 108.When main frame 102 was desired the data of storage in the access flash memory 108, main frame 102 at first sent access command to controller 106.Controller 106 is then according to the access command access flash memory of receiving from main frame 102 108.For example, when access command is write command, controller 106 will be in the data write command that main frame 102 is received the logical address of the flash memory 108 of appointment.When access command was reading order, controller 106 read flash memory 108 according to the logical address of receiving from main frame 102, and the data that will read gained again is passed to main frame 102.
Yet flash memory device 104 more can receive a plurality of special commands that main frame 102 is sent, and carry out the action of corresponding these special commands except the general access command access of foundation main frame 102 in it stored data of flash memory 108.When sending these special commands, main frame 102 can directly not be sent to flash memory device 104.Opposite, main frame 102 can send the access command of accessing file 0～file N to flash memory device 104.Flash memory storage apparatus 104 can't actually according to access command carry out access for file 0～file N at this moment, and access command can be read as special command, and carries out the action corresponding to special command.The detailed step that main frame 102 sends special command will illustrate in Fig. 4, and the detailed step that flash memory device 104 is understood special command will illustrate in Fig. 5.
Fig. 2 is the process flow diagram according to the method 200 of identification flash memory device 104 of the present invention.When a flash memory device is coupled to main frame 102, main frame 102 must identification whether this flash memory device can receive the special command that main frame 102 is sent, could send special command to this flash memory device.Otherwise if the special command that flash memory device can't identification main frame 102 be sent, the special command that main frame 102 sends will be used as general access command by flash memory device.When main frame 102 detects existing of flash memory device 104 (step 202), main frame 102 at first reads flash memory device 104 (step 204), stores file 0～file N (step 206) to determine whether flash memory device 104.In an embodiment, main frame 102 is borrowed the file name of comparison file 0～file N, stores file 0～file N to determine whether flash memory device 104.At this moment, if flash memory device 104 stores file 0～file N, then main frame 102 can determine that flash memory device can receive special command (step 208).Otherwise if flash memory device 104 does not store file 0～file N, then main frame 102 can determine that flash memory device can't receive special command (step 210).
In an embodiment, main frame 102 respectively stores same order-Fu sign indicating number corresponding tables 103 and 112 with flash memory 110, for sending and the reference that receives special command.Fig. 3 B shows the embodiment according to order of the present invention-Fu sign indicating number corresponding tables 350.The corresponding relation of the order-Fu sign indicating number corresponding tables 350 a plurality of symbol sign indicating numbers of record (symbol) and a plurality of orders.In addition, each symbol sign indicating number is made up of a plurality of numerals (digit) of fixed number.Suppose that a symbol sign indicating number is made up of two decimal numbers,, therefore have 100 kinds of symbols such as 00～99 grade and yard can represent 100 kinds of special commands because two decimal numbers have the combination of 10 * 10=100 kind.For instance, the symbol sign indicating number 18 in the order-Fu sign indicating number corresponding tables 350 is made up of numeral 1 and numeral 8, and expression one transmits code word.Symbol sign indicating number 99 in the order-Fu sign indicating number corresponding tables 350 is made up of numeral 9 and numeral 9, and expression one transmits data the finish command.
Fig. 4 is the process flow diagram that sends the method 400 of special command according to main frame of the present invention.When a special command to flash device 104 was sent in main frame 102 tendencies to develop, main frame 102 just sent a succession of access command of accessing file 0～file 9 to flash memory device 104 according to method 400.At first, main frame is a corresponding symbol sign indicating number according to order-Fu sign indicating number corresponding tables 350 these special commands of conversion of Fig. 3 B, and wherein this symbol sign indicating number comprises first numeral and second numeral (step 402).Then, main frame 102 sends the write command (step 404) of the file 0～9 that writes corresponding first numeral to flash memory device 104, sends the write command (step 406) of the file 0～9 that writes corresponding second numeral again to flash memory device 104.
At this moment, if this special command need not transmit data (step 408), then special command has transmitted and has finished.Otherwise if this special command need transmit data (step 408) in the lump, then main frame 102 sends the reading order (step 410) that reads the file 0～9 of a plurality of numerals that should data to flash memory device 104 in regular turn.When the numeral of this data transmitted all finish after (step 412), main frame 102 more sends the order (step 414) of the file 9 that writes for twice to flash memory device 104, finish with expression transmission data.In the above-mentioned method 400, main frame 102 is to transmit the numeral that the symbol sign indicating number of order comprises in the mode that sends write command, and transmits the numeral that the data of order comprises in the mode that sends reading order.In another embodiment, main frame 102 transmits the numeral that the symbol sign indicating number of order comprises in the mode that sends reading order, and transmits the numeral that the data of order comprises in the mode that sends write command.
For instance, suppose that main frame 102 desires send the transmission code word in the order of 3B figure-Fu sign indicating number corresponding tables 350, and transmit code word corresponding to symbol sign indicating number 18.Therefore, main frame 102 at first sends the write command (step 404) of the file 1 that writes corresponding numeral 1 to flash memory device 104, sends the write command (step 406) of the file 8 that writes corresponding numeral 8 again to flash memory device 104.Then, suppose that password is 9876, this password will transmit with the auxiliary information that transmits code word.Therefore main frame 102 sends to flash memory device 104 in regular turn and reads numeral 9 that should password 9876, numeral 8, numeral 7, and 4 reading orders (step 410) of the file 9 of numeral 6, file 8, file 7, file 6.At last, main frame 102 sends the order (step 414) of the file 9 that writes for twice again to flash memory device 104, finish with expression transmission data.
Fig. 5 is the process flow diagram according to the method 500 of flash memory device decipher special command of the present invention.When flash memory device 104 when main frame 102 is received the access command of accessing file 0～file 9, be a special command just, and carry out subsequent action according to this special command according to these access commands of method 500 conversion.At first, the controller 106 of flash memory device 104 receives a plurality of access commands (step 502) from main frame 102.Controller 106 judges whether that then these ` access commands carry out access (step 504) to file 0～file 9.If these access commands are not that file 0～file 9 is carried out access, then controller 106 according to access command with general procedure access flash memory 108.If these access commands are that file 0～file 9 is carried out access, then controller 106 judges whether that these access commands are write command (steps 506).
If these access commands are write commands, then controller 106 can judge that main frame 102 is at the symbol sign indicating number that sends special command.Therefore a series of numeral (step 508) that produces corresponding to the file that these access commands write of controller 106, and the symbol sign indicating number that these numerals constituted is converted to a special command (step 510) according to order-Fu sign indicating number corresponding tables 305.In an embodiment, controller 106 is a plurality of symbol sign indicating numbers according to a series of numeral that a symbol yardage number of words order segmentation procedure 508 produces, and more a plurality of symbol sign indicating numbers is converted to a plurality of special commands, and wherein this symbol yardage number of words order is represented the number of the numeral that a symbol sign indicating number is comprised.Otherwise if these access commands are reading order (steps 506), then controller 106 can judge that main frame 102 is in the data that sends special command.Therefore a plurality of numerals of the controller 106 file correspondence that produces these reading orders in regular turn and read, and form a data (step 512).At last, controller 106 is according to the pairing action of special command of data execution in step 510 generations of step 512 generation.
For instance, flash memory device 104 is received 6 access commands that write file 0～9 from main frame 102, in regular turn for writing the write command of file 1,4 reading orders that write the write command of file 8 and read file 9, file 8, file 7, file 6.Therefore, controller 102 produces file 1, the file 8 pairing numeric strings 18 (step 508) that write command write, and the symbol sign indicating number that numeric string 18 is constituted according to order-Fu sign indicating number corresponding tables 305 is converted to and transmits code word (step 510) again.Then, file 9, file 8, file 7, file 6 pairing numeric strings 9876 that controller 102 produces reading order again and read are to obtain data 9876 (step 512).At last, whether controller 106 just meets according to transmitting code word comparison keying material 9876, if meet the complete authority of the data that then allows main frame 102 have access flash memory device 104.
Though the present invention discloses as above with preferred embodiment; right its is not in order to qualification the present invention, any those skilled in the art, without departing from the spirit and scope of the present invention; when can doing a little modification and perfect, so protection scope of the present invention is when with being as the criterion that claims were defined.
Claims (11)
1. method that transmits special command to flash device, this flash memory device couples mutually with a main frame, and this method comprises the following steps:
Store a plurality of files in this flash memory device, each file has a corresponding numeral;
Store an order-Fu sign indicating number corresponding tables in this flash memory device, wherein should a plurality of symbol sign indicating numbers of order-Fu sign indicating number corresponding tables record and the corresponding relation of a plurality of orders, and each symbol yard is formed by a plurality of digital;
When a plurality of special commands are sent in this main frame tendency to develop to this flash memory device, make this main frame send a succession of access command of the described a plurality of files of access to this flash memory device;
Make this flash memory device produce a plurality of numerals of the file correspondence of described access command institute access in regular turn, and form one first numeric string;
Make this flash memory device change this first numeric string and be corresponding described a plurality of special commands according to this order-Fu sign indicating number corresponding tables; And
Make this flash memory device carry out corresponding action according to described a plurality of special commands.
2. the method for transmission special command to flash device as claimed in claim 1 is characterized in that, this first numeric string to the conversion of described a plurality of special commands comprises:
When described access command is the write command that writes described a plurality of files, making this flash memory device change this first numeric string is a plurality of first symbol sign indicating numbers, and changes the described a plurality of special commands of described a plurality of first symbol sign indicating number for correspondence according to this order-Fu sign indicating number corresponding tables; And
When described access command is the reading order that reads described a plurality of files, making this flash memory device change this first numeric string is one first data.
3. the method for transmission special command to flash device as claimed in claim 2 is characterized in that, this method more comprises makes this flash memory device handle this first data.
4. the method for transmission special command to flash device as claimed in claim 2, it is characterized in that, this first numeric string comprises that to the conversion of described a plurality of first symbol sign indicating numbers cutting apart this first numeric string according to a symbol yardage number of words order is described a plurality of first symbol sign indicating number, and wherein this symbol yardage number of words order is represented the number of the numeral that a symbol sign indicating number is comprised.
5. the method for transmission special command to flash device as claimed in claim 1 is characterized in that, the transmission of described access command comprises:
Make this main frame change the second symbol sign indicating number that described a plurality of special command is a plurality of correspondences according to this order-Fu sign indicating number corresponding tables;
Make this main frame produce one second numeric string according to described a plurality of second symbol sign indicating numbers; And
Make this main frame send the described access command of access to this flash memory device in regular turn corresponding to described a plurality of files of the numeral of this second numeric string.
6. the method for transmission special command to flash device as claimed in claim 5 is characterized in that, described access command is the write command that writes described a plurality of files, and this method more comprises:
When one second data is sent in this main frame tendency to develop to this flash memory device, make this main frame send a succession of reading order of the described a plurality of files that read the numeral that is comprised corresponding to this second data to this flash memory device.
7. the method for transmission special command to flash device as claimed in claim 5 is characterized in that, described access command is the reading order that reads described a plurality of files, and this method more comprises:
When one second data is sent in this main frame tendency to develop to this flash memory device, make this main frame send a succession of write command of the described a plurality of files that write the numeral that is comprised corresponding to this second data to this flash memory device.
8. the method for transmission special command to flash device as claimed in claim 1 is characterized in that, this method more comprises:
When this main frame detected existing of this flash memory device, this main frame read this flash memory device to confirm whether to store described a plurality of file in this flash memory device;
When this flash memory device stored described a plurality of file, this flash memory device of this host acknowledgement can receive described access command; And
When this flash memory device did not store described a plurality of file, this flash memory device of this host acknowledgement can't receive described access command.
9. flash memory device, this flash memory device couples mutually with a main frame, and this flash memory device comprises:
One flash memory stores a plurality of files, and stores an order-Fu sign indicating number corresponding tables, and wherein each file has a corresponding numeral, the corresponding relation of a plurality of symbol sign indicating numbers of this order-Fu sign indicating number corresponding tables record and a plurality of orders, and each symbol sign indicating number is made up of a plurality of numerals; And
One controller, receive a succession of access command from this main frame, when described access command is the described a plurality of file of access, produce the pairing a plurality of numerals of file of described access command institute access in regular turn and form a numeric string, change this numeric string according to this order-Fu sign indicating number corresponding tables and be corresponding a plurality of special commands, and carry out corresponding action according to described a plurality of special commands.
10. flash memory device as claimed in claim 9, it is characterized in that, when described access command is when writing the write command of described a plurality of files, it is a plurality of first symbol sign indicating numbers that this controller is changed this numeric string, and changes the described a plurality of special commands of described a plurality of first symbol sign indicating number for correspondence according to this order-Fu sign indicating number corresponding tables; And when described access command be when reading the reading order of described a plurality of files, it is one first data that this controller is changed this numeric string.
11. flash memory device as claimed in claim 10, it is characterized in that, it is the described first symbol sign indicating number that this controller is cut apart this numeric string according to a symbol yardage number of words order, and to change this numeric string to the described first symbol sign indicating number, wherein this symbol yardage number of words order is represented the number of the numeral that a symbol sign indicating number is comprised.
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| CN2662333Y (en) * | 2003-10-27 | 2004-12-08 | 群联电子股份有限公司 | Portable multimedia apparatus for international association interface of personal computer memory card |
| US7316007B2 (en) * | 1999-11-12 | 2008-01-01 | Sun Microsystems, Inc. | Optimization of n-base typed arithmetic expressions |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7316007B2 (en) * | 1999-11-12 | 2008-01-01 | Sun Microsystems, Inc. | Optimization of n-base typed arithmetic expressions |
| CN2662333Y (en) * | 2003-10-27 | 2004-12-08 | 群联电子股份有限公司 | Portable multimedia apparatus for international association interface of personal computer memory card |
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| JP特开2000-322294A 2000.11.24 |
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