CN100507921C - Words display process in embedded system and system thereof - Google Patents
Words display process in embedded system and system thereof Download PDFInfo
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Abstract
The invention discloses a character displaying method in an embedding type system. The invention comprises that: the invention confirms the current embedding type system display the needed characters without repeat in lattice word stock; the lattice database corresponding to the characters is stored without repeat in the preset lattice database; lattice data corresponding to the current character in the lattice database is found out according to the machine inner code corresponding to the current character to be displayed and based on the preset searching rule; and the current character is displayed according to the found lattice data. Besides, the invention also discloses a character displaying system in an embedding type system. As the technical proposal disclosed by the invention needs not to store complete lattice word stock, thereby saving the storing material of the system.
Description
Technical field
The present invention relates to graphical user interface (GUI) field of embedded system, relate in particular to character displaying method and system in a kind of embedded system.
Background technology
GUI mainly comprises the man-machine interaction graphic user interface, is the visual experience and the interactive operation part of screen product.In embedded system was used, the operability of man-machine interface was more and more paid attention to by the user, and coming display menu with literal then is the prerequisite of operability.
During specific implementation, literal adopts the mode of dot matrix to show usually, wherein, 8 (bit) in the byte (Byte), represent a point for every, be used to indicate this point whether to show, for example, this position 1 expression shows, puts 0 expression and does not show, then a byte can be represented 8 points, for Chinese character and character, if adopt 16 * 16 dot matrix demonstration, then this literal lattice data corresponding need take 2 * 16=32 byte, if adopt 8 * 16 dot matrix demonstration, then need to take 1 * 16=16 byte.In actual applications, need to store each literal lattice data corresponding in the system, at present, to use the literal lattice data corresponding in the GB always and be made into dot matrix word library, and for each literal in the dot matrix word library is provided with numbering, this numbering is called internal code, and the internal code of each literal is corresponding with the dot array data of this literal.For the literal of Chinese, Korean and Japanese etc., its pairing internal code takies two bytes usually.For shown literal is carried out record, and reduce literal as far as possible and store shared capacity, when the needs shorthand, only the pairing internal code of this literal need be stored and get final product, when the needs display text, then the internal code of this literal sequence number of depositing as the dot array data of storing in the system can be deposited sequence number is sought this literal correspondence from dot matrix word library dot array data according to this, call this dot array data and show.
In the prior art, in order to realize the demonstration of literal, in embedded system, adopt LCD (LCD) module of built-in dot matrix word library usually, promptly the Chinese character quantity no matter current system need show is to be mostly few, all set up a complete GB dot matrix word library, but in the practical application, demand based on embedded system, and it is less usually not have the literal number that repeats in the literal that needs to show, and because the memory capacity of embedded system is less usually, built-in complete dot matrix word library certainly will cause the waste of system's storage resources.
Summary of the invention
In view of this, provide two kinds of character displaying methods in the embedded system on the one hand among the present invention, two kinds of literal display systems in the embedded system are provided on the other hand, so that the system of saving storage resources.
Character displaying method in first kind of embedded system provided by the present invention comprises:
From dot matrix word library, determine the no replicated literal that current embedded system shows to be needed;
The dot array data of described no replicated literal correspondence is not had the compartment of terrain to be stored in the default dot array data table;
The internal code of described no replicated literal correspondence is deposited sequential storage in default internal code table according to the dot array data of described no replicated literal correspondence;
The internal code of the current literal correspondence that described desire is shown is as the described internal code table of index search, the internal code of determining described current literal correspondence is arranged in the serial number of described internal code table, according to the start address of described serial number and dot array data table and the byte-sized that dot array data takies, calculate the start address of dot array data in described dot array data table of described current literal correspondence, from described dot array data table, find out the dot array data of described current literal correspondence according to the start address of dot array data in described dot array data table of described current literal correspondence;
Show described current literal according to the described dot array data of finding out.
Wherein, the described dot array data that will not have the replicated literal correspondence does not have the compartment of terrain and is stored in the default dot array data table and is: with the dot array data of described no replicated literal correspondence, do not have the compartment of terrain according to the ascending order of the internal code of described no replicated literal correspondence or descending and be stored in the default dot array data table;
The internal code of the described current literal correspondence that desire is shown as the described internal code table of index search is: according to the method for binary search, the internal code of the current literal correspondence that desire is shown is as the described internal code table of index search.
Preferably, this method further comprises: utilize the literal of not storing corresponding dot array data in the default textual representation current embedded system.
Preferably, this method further comprises: when the current literal that shows in desire is shown as described default literal, the dot array data of described current literal correspondence is stored in the described dot array data table, the internal code of described current literal correspondence is stored in the described internal code table.
Character displaying method in second kind of embedded system provided by the present invention comprises:
From dot matrix word library, determine the no replicated literal that current embedded system shows to be needed;
With the dot array data of described no replicated literal correspondence, according to default be that the hash algorithm of key word is stored in the default dot array data table with the internal code;
According to default hash algorithm, the internal code of the current literal correspondence that shows with described desire is that key word carries out Hash calculation, obtain Hash result, the dot array data of described current literal correspondence is found out in the position corresponding with described Hash result from described dot array data table;
Show described current literal according to the described dot array data of finding out.
Preferably, this method further comprises: utilize the literal of not storing corresponding dot array data in the default textual representation current embedded system.
Preferably, this method further comprises: when the current literal that shows in desire is shown as described default literal, the dot array data of described current literal correspondence is stored in the described dot array data table.
Literal display system in first kind of embedded system provided by the present invention comprises:
The dot array data memory module is used for not having the compartment of terrain storage shows the no replicated literal correspondence of needs from the definite current embedded system of dot matrix word library dot array data;
The internal code memory module is used to store the internal code of described no replicated literal correspondence, the sequence consensus of depositing of depositing the order dot array data corresponding with described no replicated literal of the internal code of described no replicated literal correspondence;
Search module, the internal code that is used for current literal correspondence that described desire is shown is searched from described internal code memory module as index, determine the storage order of internal code in described internal code memory module number of described current literal correspondence, according to the start address of described serial number and dot array data memory module and the byte-sized that dot array data takies, calculate the start address of dot array data in described dot array data memory module of described current literal correspondence, from described dot array data memory module, find out the dot array data of described current literal correspondence according to the start address of dot array data in described dot array data table of described current literal correspondence;
Display module is used for showing described current literal according to the described dot array data of finding out.
Literal display system in second kind of embedded system provided by the present invention comprises:
The dot array data memory module is used for showing the dot array data of the no replicated literal correspondence of needs from the current embedded system that dot matrix word library is determined, is that the hash algorithm of key word is stored with the internal code according to what preset;
Search module, be used for according to default hash algorithm, the internal code of the current literal correspondence that shows with described desire is that key word carries out Hash calculation, obtain Hash result, the dot array data of described current literal correspondence is found out in the position corresponding with described Hash result from described dot array data memory module;
Display module is used for showing described current literal according to the described dot array data of finding out.
From such scheme as can be seen, need not to store complete dot matrix word library in the embedded system among the present invention, only need the storage current embedded system to show that required no replicated literal gets final product, and set in advance search rule, the internal code of the current literal correspondence that shows according to desire, from the dot array data of being stored, find out the dot array data of current literal correspondence and show according to this default search rule, owing to show the no replicated literal that needs corresponding character in the dot matrix word library usually in the embedded system, so the technical scheme among the present invention has been saved the storage resources of system.
In addition, because each embedded system can be stored repetition-free word according to the demand of self, and formulates search rule, thereby the literal that has improved embedded system shows dirigibility.
Description of drawings
Fig. 1 is the exemplary process diagram of the character displaying method in the embedded system in the embodiment of the invention;
Fig. 2 is the exemplary block diagram of the literal display system in the embedded system in the embodiment of the invention.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, below in conjunction with embodiment and accompanying drawing, the present invention is described in more detail.
Fig. 1 shows the exemplary process diagram of embedded system Chinese words display packing in the embodiment of the invention.As shown in Figure 1, this flow process comprises the steps:
Wherein, it shows that required no replicated literal may be identical different embedded systems, also may be different.In the practical application, can from dot matrix word library, determine the no replicated literal that needs according to the demand of current embedded system.
According to different specific implementation methods, wherein the mode that the dot array data of determined no replicated literal correspondence is stored can have multiplely, and correspondingly the type of dot matrix tables of data also can have multiple.Only enumerate two kinds of specific implementation methods wherein in the present embodiment:
Method one: default bidimensional array is as the dot array data table, this bidimensional array can be designated as FontLib[] [], if the dot array data of each literal correspondence takies 32 bytes, then the size of this bidimensional array is FontLib[] [32], afterwards, the dot array data of determined no replicated literal correspondence not being had the compartment of terrain is stored in this dot array data table.
In this method one, further, a predeterminable internal code table, this internal code table can be one-dimension array, as be designated as FontIndex[], the internal code of determined no replicated literal correspondence is deposited sequential storage in this internal code table according to the dot array data of described literal correspondence.Be FontLib[] dot array data of [] Chinese words correspondence deposit order and FontIndex[] internal code of Chinese words correspondence to deposit order be consistent.
Method two: default Hash table is as the dot array data table, afterwards, with the dot array data of determined no replicated literal correspondence, according to default be that the hash algorithm of key word is stored in the default dot array data table with the internal code.
Wherein, for method cited in the step 102 one, in this step, the internal code of the current literal correspondence that desire can be shown is as the internal code table described in the index search method one, for example, suppose to comprise " north " in the above-mentioned no replicated literal, and the current literal that desire shows is " north ", then since the internal code of depositing order and internal code table Chinese words correspondence of the dot array data of dot array data table Chinese words correspondence to deposit in proper order be consistent, therefore can search the internal code table according to the internal code 0x5317 of " north " word, the internal code of therefrom determining " north " word correspondence is arranged in the serial number of internal code table, suppose that " north " is n at the serial number of internal code table, the byte-sized (being assumed to be 32) that can take then according to the start address (being assumed to be FontLib) and the dot array data of described serial number n and dot array data table, calculate the start address of dot array data in the dot array data table described in the method one of " north " word correspondence, be that computing method can be: FontLib+n * 32, afterwards, from described dot array data table, find out the dot array data of " north " word correspondence according to the start address of being calculated.
For method two cited in the step 102, in this step, can be according to default hash algorithm, the internal code of the current literal correspondence that shows with desire is that key word carries out Hash calculation, obtain Hash result, the dot array data of current literal correspondence is found out in the position corresponding with described Hash result from the dot array data table described in the method two.
Further, for the method for describing in the present embodiment one, when the dot array data of determined no replicated literal correspondence and internal code are stored, can store according to the ascending order or the descending of internal code, when the internal code of the current literal correspondence that desire is shown is as index search internal code table afterwards, can search according to the method for binary search, thereby looked-up sequence is accelerated.
In addition, in the present embodiment, can also set in advance an alternative literal, be used for the literal of representing that current embedded system can't show, promptly not store the literal of corresponding dot array data in the system.Suppose this default literal is "? ", then correspondingly, in the dot array data table storage should "? " lattice data corresponding.
For the method for describing in the present embodiment one, also need in the internal code table, store should "? " corresponding internal code.When the internal code of the current literal correspondence that desire is shown during as index search internal code table, if can't find this internal code and corresponding serial number thereof, determine that then current literal can't show, and then will preset literal "? " corresponding internal code is as index search internal code table, and definite "? " corresponding internal code is arranged in the serial number of internal code table, afterwards, according to the start address of described serial number and dot array data table and the byte-sized that dot array data takies, calculate this "? " the corresponding start address of dot array data in the dot array data table, according to this start address from the dot array data table, find out "? " corresponding dot array data, so with "? " show.
Further, when the current literal that shows in desire is shown as default literal, the dot array data of literal correspondence before deserving can be stored in the dot array data table, correspondingly the internal code of literal correspondence before deserving can be stored in the internal code table.
For the method two of describing in the present embodiment, when according to default hash algorithm, the internal code of the current literal correspondence that shows with desire is after key word carries out Hash calculation and obtains Hash result, if the data of interspersing of preceding literal correspondence are not deserved in the position of this Hash result correspondence in the dot array data table, determine that then current literal can't show, and then according to default hash algorithm, with default literal "? " corresponding internal code is that key word carries out Hash calculation, obtain Hash result, the position corresponding from the dot array data table with described Hash result, find out "? " corresponding dot array data, so with "? " show.
Further, when the current literal that shows in desire is shown as default literal, the dot array data of literal correspondence before deserving can be stored in the dot array data table.
As seen, among the present invention by utilizing the literal that can't show in the default literal representative system, can avoid system to make mistakes on the one hand, can know the literal that system lacks according to shown default literal on the other hand, and then the dot array data of the literal that this can be lacked be stored.
More than the character displaying method in the embedded system in the embodiment of the invention is described in detail, again the literal display system in the embedded system in the embodiment of the invention is described in detail below.
Fig. 2 is the exemplary block diagram of the literal display system in the embedded system in the embodiment of the invention.As shown in Figure 2, this system comprises: the dot array data memory module, search module and display module.
Wherein, the dot array data memory module is used for storing the dot array data that shows the no replicated literal correspondence of needs from the definite current embedded system of dot matrix word library.
Search the internal code that module is used for the current literal correspondence that shows according to desire, from described dot array data memory module, find out the dot array data of described current literal correspondence according to default search rule.
Display module is used for showing described current literal according to the described dot array data of finding out.
During specific implementation, the method for describing in the corresponding present embodiment method one, the dot array data memory module in the present embodiment system can be carried out the dot array data of described no replicated literal correspondence continuously every storage.And can further comprise in the present embodiment system: the internal code memory module, be used to store the internal code of described no replicated literal correspondence, wherein, the sequence consensus of depositing of depositing the order dot array data corresponding of the internal code of described no replicated literal correspondence with described no replicated literal.And the internal code of searching the current literal correspondence that module can show described desire is searched from described internal code memory module as index, determine described internal code and search storage order number in the module at described internal code, according to the start address of described serial number and dot array data memory module and the byte-sized that dot array data takies, calculate the start address of dot array data in described dot array data memory module of described current literal correspondence, from described dot array data memory module, find out the dot array data of current literal correspondence according to described start address.
Wherein, also can store when dot array data memory module and internal code memory module are stored, then search module when in the internal code memory module, searching, can search according to the method for binary search according to the ascending order or the descending of internal code.
The method two of describing in the corresponding present embodiment method, the dot array data memory module in the present embodiment system can be with the dot array datas of described no replicated literal correspondence, according to default be that the hash algorithm of key word is stored with the internal code.Correspondingly, searching module can be according to default hash algorithm, the internal code of the current literal correspondence that shows with described desire is that key word carries out Hash calculation, obtain Hash result, the dot array data of described current literal correspondence is found out in the position corresponding with described Hash result from described dot array data memory module.
Wherein, the concrete operations of each module in the present embodiment system can be consistent with the operation described in the present embodiment method, gives unnecessary details no longer one by one herein.
Above-described specific embodiment; purpose of the present invention, technical scheme and beneficial effect are further described; institute is understood that; the above only is preferred embodiment of the present invention; be not to be used to limit protection scope of the present invention; within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (9)
1, the character displaying method in a kind of embedded system is characterized in that, this method comprises:
From dot matrix word library, determine the no replicated literal that current embedded system shows to be needed;
The dot array data of described no replicated literal correspondence is not had the compartment of terrain to be stored in the default dot array data table;
The internal code of described no replicated literal correspondence is deposited sequential storage in default internal code table according to the dot array data of described no replicated literal correspondence;
The internal code of the current literal correspondence that described desire is shown is as the described internal code table of index search, the internal code of determining described current literal correspondence is arranged in the serial number of described internal code table, according to the start address of described serial number and dot array data table and the byte-sized that dot array data takies, calculate the start address of dot array data in described dot array data table of described current literal correspondence, from described dot array data table, find out the dot array data of described current literal correspondence according to the start address of dot array data in described dot array data table of described current literal correspondence;
Show described current literal according to the described dot array data of finding out.
2, the method for claim 1, it is characterized in that, the described dot array data that will not have the replicated literal correspondence does not have the compartment of terrain and is stored in the default dot array data table and is: with the dot array data of described no replicated literal correspondence, do not have the compartment of terrain according to the ascending order of the internal code of described no replicated literal correspondence or descending and be stored in the default dot array data table;
The internal code of the described current literal correspondence that desire is shown as the described internal code table of index search is: according to the method for binary search, the internal code of the current literal correspondence that desire is shown is as the described internal code table of index search.
3, method as claimed in claim 1 or 2 is characterized in that, this method further comprises: utilize the literal of not storing corresponding dot array data in the default textual representation current embedded system.
4, method as claimed in claim 3, it is characterized in that, this method further comprises: when the current literal that shows in desire is shown as described default literal, the dot array data of described current literal correspondence is stored in the described dot array data table, the internal code of described current literal correspondence is stored in the described internal code table.
5, the character displaying method in a kind of embedded system is characterized in that, this method comprises:
From dot matrix word library, determine the no replicated literal that current embedded system shows to be needed;
With the dot array data of described no replicated literal correspondence, according to default be that the hash algorithm of key word is stored in the default dot array data table with the internal code;
According to default hash algorithm, the internal code of the current literal correspondence that shows with described desire is that key word carries out Hash calculation, obtain Hash result, the dot array data of described current literal correspondence is found out in the position corresponding with described Hash result from described dot array data table;
Show described current literal according to the described dot array data of finding out.
6, method as claimed in claim 5 is characterized in that, this method further comprises: utilize the literal of not storing corresponding dot array data in the default textual representation current embedded system.
7, method as claimed in claim 6 is characterized in that, this method further comprises: when the current literal that shows in desire is shown as described default literal, the dot array data of described current literal correspondence is stored in the described dot array data table.
8, the literal display system in a kind of embedded system is characterized in that, this system comprises:
The dot array data memory module is used for not having the compartment of terrain storage shows the no replicated literal correspondence of needs from the definite current embedded system of dot matrix word library dot array data;
The internal code memory module is used to store the internal code of described no replicated literal correspondence, the sequence consensus of depositing of depositing the order dot array data corresponding with described no replicated literal of the internal code of described no replicated literal correspondence;
Search module, the internal code that is used for current literal correspondence that described desire is shown is searched from described internal code memory module as index, determine the storage order of internal code in described internal code memory module number of described current literal correspondence, according to the start address of described serial number and dot array data memory module and the byte-sized that dot array data takies, calculate the start address of dot array data in described dot array data memory module of described current literal correspondence, from described dot array data memory module, find out the dot array data of described current literal correspondence according to the start address of dot array data in described dot array data table of described current literal correspondence;
Display module is used for showing described current literal according to the described dot array data of finding out.
9, the literal display system in a kind of embedded system is characterized in that, this system comprises:
The dot array data memory module is used for showing the dot array data of the no replicated literal correspondence of needs from the current embedded system that dot matrix word library is determined, is that the hash algorithm of key word is stored with the internal code according to what preset;
Search module, be used for according to default hash algorithm, the internal code of the current literal correspondence that shows with described desire is that key word carries out Hash calculation, obtain Hash result, the dot array data of described current literal correspondence is found out in the position corresponding with described Hash result from described dot array data memory module;
Display module is used for showing described current literal according to the described dot array data of finding out.
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| CNB2007101793265A CN100507921C (en) | 2007-12-12 | 2007-12-12 | Words display process in embedded system and system thereof |
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| CN102169423B (en) * | 2010-02-26 | 2013-03-27 | 腾讯科技（北京）有限公司 | Method and system for displaying characters |
| CN102208180B (en) * | 2011-06-02 | 2013-04-17 | 福建新大陆通信科技股份有限公司 | Method for rapidly displaying vector font by set top box (STB) |
| CN103699538B (en) * | 2012-09-27 | 2017-10-31 | 汉王科技股份有限公司 | A kind of method and device of file-sharing |
| CN102981795B (en) * | 2012-10-31 | 2015-05-27 | 飞天诚信科技股份有限公司 | Method of displaying information |
| CN104394332A (en) * | 2014-11-25 | 2015-03-04 | 冯为心 | Word stock establishing method applied to SDI (Serial Digital Interface) HD video character superimposition and word stock device |
| CN104598560A (en) * | 2015-01-06 | 2015-05-06 | 绍兴文理学院 | Display method and display system for multifont characters of embedded system |
| CN104639854B (en) * | 2015-01-29 | 2017-08-04 | 广东迅通科技股份有限公司 | A kind of string processing display methods based on davinci platform |
| CN109119048A (en) * | 2018-09-19 | 2019-01-01 | 武汉华风电子工程有限公司 | It is a kind of for be free of character library single-color dot matrix display screen character fast refresh display methods |
| CN112395828A (en) * | 2020-12-18 | 2021-02-23 | 深圳高通半导体有限公司 | Recording method of dot matrix character library information and generating method of dot matrix character |
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