CN102426565A - SOC (System on Chip) chip with font processing function - Google Patents
SOC (System on Chip) chip with font processing function Download PDFInfo
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- CN102426565A CN102426565A CN2011103437276A CN201110343727A CN102426565A CN 102426565 A CN102426565 A CN 102426565A CN 2011103437276 A CN2011103437276 A CN 2011103437276A CN 201110343727 A CN201110343727 A CN 201110343727A CN 102426565 A CN102426565 A CN 102426565A
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Abstract
The invention discloses a SOC (System on Chip) chip with a font processing function, belonging to the technical field of embedded system application. The SOC chip comprises a microprocessor, a font storer, a first storer and a second storer which are connected through an address bus; in addition, the SOC chip also comprises a font processing module which is connected with the microprocessor through the address bus and used for processing a font file. Through special hardware inside the SOC chip, the concrete application is realized, and the font is processed at the same time; and the font can be a vector font or a dot font; the SOC chip has the advantages of flexible application, good font display effect, high processing speed, high font information safety and is a font processing chip which has high generality.
Description
Technical field
The present invention relates to the embedded system applied technical field, particularly a kind of SOC chip with character library processing capacity.
Background technology
Development along with embedded system; Adopt the equipment of embedded system also to emerge in an endless stream; From I.D. card reader, TV set-top box to printer, tax-control cash register and portable terminal, MP3/MP4; The application of embedded system is increasingly extensive, and user experience is also increasing to come into one's own, and this just all has higher requirement to the portability of embedded device, interface display effect, security, handling property etc.
Owing to present quite a few embedded device all has LCDs, to realize the demonstration of information in the application, therefore storage and the processing to font file is just indispensable.The existing character library that is used for the demonstration of embedded system interface font mainly contains two types: vector font library and dot matrix word library.Vector font library takes up space greatly, but flexibly, font is scaling infinitely; Dot matrix word library takes up space little, and display speed is fast, but does not support the amplification of font or dwindle, and display effect is poor.Because font file is generally all bigger; The dot character library file less even if take up room also needs the space about the 0.5M byte at least; If therefore deposit vector font library or deposit multiple dot matrix word library simultaneously and just need take bigger storage space; But embedded device receives the restriction of own characteristic; Storage space is generally all smaller, only can realize depositing of application programs and personal data, and therefore the font file of present most of embedded device all leaves in the FLASH chip that is connected with control chip.There is following shortcoming in this location mode:
1) owing to adopt being connected of serial mode realization data between control chip and the FLASH chip of depositing font file, this connected mode greatly reduces processing speed of data.
2) the font file major part all is to leave in the FLASH chip that is connected with chip with clear-text way; Do not have any secrecy provision, illegal person can be easily through distorting internal code information or lattice information, or change character library through the mode of direct replacement character library; Change the application apparatus content displayed; Thereby mislead the user, very easily cause user's private information to be revealed, cause potential safety hazard.Though for improving the security of font file; Some equipment is through guaranteeing the font file method of encrypting in the FLASH chip confidentiality of font file at present; Though this mode can improve the security of font file; But the file that at every turn reads among the FLASH all need be deciphered data wherein, influences the processing speed of embedded device equally.
3) embedded device that adopts control chip and FLASH chip mode connected in series to encapsulate; Because the existence of FLASH chip causes whole embedded device volume excessive; Lost the portable advantage of embedded device, appearance design is difficult to hold, and is also competitiveless on the price.
4) in order to reach literal, the high-quality real effect of character; Other processing operations to font file are also indispensable; As to the conversion of coded format, dot matrix word library horizontal/selection of vertical delivery etc.; If only rely on the processor of embedded device chip self when realizing concrete the application, again character library to be carried out processing operations, the processing speed of device chip is had a greatly reduced quality.
This shows how a kind of SOC (System on Chip) chip with character library processing capacity is provided, guarantee that when realizing concrete the application security of font file storage, effect and the speed that font is handled are of great practical significance.
Summary of the invention
The object of the present invention is to provide a kind of SOC chip of realizing the character library processing capacity; Make it to realize that concrete Embedded Application can guarantee the flexible demonstration of the safety storing and the font of font file again; Improved the portability and the handling property of the embedded device that uses this SOC chip simultaneously, also more competitive on the price.
The invention provides a kind of SOC chip with character library processing capacity; Said SOC chip comprises microprocessor, library stores device, first memory and second memory; Connect through address bus; Said SOC chip also comprises the character library processing module that is connected with microprocessor through said address bus, is used to realize the processing to font file.
Said character library processing module comprises:
The coded format converting unit is used for realizing the selection of different application to the different coding form;
The character library converting unit is used for realizing the conversion of vector font library file to dot character library file according to practical application;
Dot matrix horizontal stroke/vertical delivery selected cell is used for when adopting dot character library file to carry out the font demonstration, realizing the selection of horizontal, the vertical delivery of data.
Said microprocessor is used to control the setting of access, transmission and the parameter of said SOC data inside chips, and receives and carry out external command, to realize the concrete application of equipment; Said library stores device is used for the memory word library file, and said font file comprises vector font library file or dot character library file; The type of said library stores device comprises mask model ROM, otp memory or FLASH storer; Said first memory is the RAM storer, is used to store intermediate data; Said second memory is the FLASH storer, is used to store the Embedded Application data.
Said SOC chip also comprises interface module, connects through said address bus, is used to realize and extraneous data interaction; Said interface module comprises common apparatus interface module and I/O interface module.
Said SOC chip also comprises the AES coprocessor, connects through said address bus, is used to realize the encryption and decryption to the chip internal application data.
The present invention also provides a kind of SOC chip with character library processing capacity; Said SOC chip comprises microprocessor, first memory and second memory; Connect through address bus; Said SOC chip also comprises the character library processing module that is connected with microprocessor through said address bus, is used to realize the processing to font file.
Said character library processing module comprises:
The coded format converting unit is used for realizing the selection of different application to the different coding form;
The character library converting unit is used for realizing the conversion of vector font library file to dot character library file according to practical application;
Dot matrix horizontal stroke/vertical delivery selected cell is used for when adopting dot character library file to carry out the font demonstration, realizing the selection of horizontal, the vertical delivery of data.
Said microprocessor is used to control the setting of access, transmission and the parameter of said SOC data inside chips, and receives and carry out external command, to realize the concrete application of equipment; Said first memory is the RAM storer, is used to store intermediate data; Said second memory is the FLASH storer, is used to store Embedded Application data and font file; Said font file comprises vector font library file or dot character library file.
Said SOC chip also comprises interface module, connects through said address bus, is used to realize and extraneous data interaction; Said interface module comprises common apparatus interface module and I/O interface module.
Said SOC chip also comprises the AES coprocessor, connects through said address bus, is used to realize the encryption and decryption to the chip internal application data.
Compared with prior art, the SOC chip with character library processing capacity provided by the invention has following advantage:
1, for guaranteeing the security of word-base data; Font file is stored in the storage medium of SOC chip internal; It is safer compared to prior art font file to be put into the mode of the FLASH chip that is connected with the SOC chip, and owing to saved FLASH, makes that to adopt the embedded device volume of this SOC chip littler; Cost is lower, and portability is stronger;
2, added the character library processing module at the SOC chip internal through hardware circuit design; Realized the processing capacity of word-base data; Realize that than software the mode of this function more can guarantee the processing speed of character library; Owing to be independent of the processor of chip itself, each its duty of holding concurrently that makes both: the character library processing module is specifically designed to and realizes the various processing operations of chip internal to font file, and the microprocessor of chip self then is mainly used in the concrete application of realization embedded device; Do not influencing on the basis of SOC chip to concrete application processes speed like this, guaranteeing the speed that character library is handled;
3, for making full use of the advantage of dot matrix word library and vector font library; To realize the display requirement of different application to different fonts; SOC chip among the present invention can be realized the conversion of vector font library to dot matrix word library; To adapt to the different demands of different application to font, can also realize the operation that other character libraries are handled simultaneously, guaranteed the display quality of font.
Description of drawings
Fig. 1 is the theory structure synoptic diagram of the SOC chip with character library processing capacity of the embodiment of the invention 1;
Fig. 2 is the theory structure synoptic diagram that the embodiment of the invention 1 has the liquid crystal type intelligent code key of character library processing capacity SOC chip;
Fig. 3 is the structural representation of the embodiment of the invention 1 character library processing module;
Fig. 4 is the theory structure synoptic diagram of the SOC chip with character library processing capacity of the embodiment of the invention 2;
Fig. 5 is the theory structure synoptic diagram that the embodiment of the invention 2 has the liquid crystal type intelligent code key of character library processing capacity SOC chip.
Embodiment
Below in conjunction with accompanying drawing and embodiment, technical scheme of the present invention is further described.
As shown in Figure 1; The embodiment of the invention provides a kind of SOC chip with character library processing capacity; This SOC chip comprises microprocessor, library stores device, character library processing module, RAM, FLASH, usb interface module and I/O interface module, connects through address bus.Wherein, the character library processing module is connected with microprocessor through address bus, is used to realize the processing to font file; Usb interface module and I/O interface module are used to realize SOC chip and extraneous data interaction.
Be example with plug-in LCDs of SOC chip with character library processing capacity and the liquid crystal type intelligent code key that button is processed below, come the function and the effect of the SOC chip with character library processing capacity of sets forth in detail the present invention realization.The liquid crystal type intelligent code key is a kind of high-end intelligent code key; Be characterized in data presentation to be signed in the process of exchange being come out through plug-in LCDs; The user treats and just can realize the signature operation to said data after signing messages is confirmed; Guarantee " finding is promptly signed ", improved network bank business based security.
As shown in Figure 2, the liquid crystal type intelligent code key is made up of the SOC chip 1 with character library processing capacity, LCD display 2 and button 3 in the present embodiment.Wherein, SOC chip 1 with character library processing capacity comprises microprocessor 11 (MPU), character library processing module 12, FLASH13, RSA coprocessor 15, DES coprocessor 16, SSF33 coprocessor 17, library stores device 18 (ROM), RAM19, usb interface module 20, GPIO interface module 21 and SPI interface module 22, and above-mentioned all parts connect through address bus 14.
Wherein, MPU11 is used to control the setting of access, transmission and the parameter of SOC data inside chips as the controller of whole SOC chip, and receives and carry out external command, to realize the concrete application of equipment.
Wherein, As shown in Figure 3, character library processing module 12 realizes the processing to font file through hardware design circuit, specifically comprises: coded format converting unit 121; Be used for realizing the selection of different application, for example conversion from the GBK character set to the UTF8 character set to the different coding form; Character library converting unit 122 is used for realizing the conversion of vector font library file to dot character library file according to practical application; Dot matrix horizontal stroke/vertical delivery selected cell 123 is used for when adopting dot character library file to carry out the font demonstration, realizing the selection of horizontal, the vertical delivery of data.
Wherein, FLASH13 be used to store the COS program that realizes Embedded Application and with user-dependent various data; RAM19 is used to realize the intermediate storage of operational data.
Wherein, ROM18 is used for the memory word library file.Font file comprises vector font library file or dot character library file.In practical application, can only store the vector font library file among the ROM18, can perhaps only store dot character library file through 122 conversions of realization from the vector font library to the dot matrix word library of the character library converting unit in the inner character library processing module 12 according to actual needs.Owing to the space that font file especially vector font library file occupies is bigger, and the ROM space is generally all less in the common SOC chip, in order to realize the storage of big data; Need to enlarge the ROM addressing space; According to prior art, this point has been easy to realize, no longer has been described in detail.
Wherein, RSA coprocessor 15, DES coprocessor 16 and SSF33 coprocessor 17 realize that through hardware RSA, DES, SSF33 enciphering and deciphering algorithm are to accomplish the protection to transaction data respectively.
Wherein, usb interface module 20 is realized being connected of this intelligent code key and exterior PC when being used to conclude the business; GPIO interface module 21, be used to realize with the liquid crystal type intelligent code key on being connected of button 3; SPI interface module 22, realization is connected with LCD display 2.In practical application; Can also increase the device interface module and the I/O interface module of other types as required; For example A/D translation interface module and D/A translation interface module, RS-232 interface module and I2C interface module, these modules connect through address bus.
In practical application, can also use other storage mediums to replace the storage that ROM realizes font file, for example otp memory (One Time Programable, One Time Programmable), FLASH or EEPROM according to actual needs.Various storage mediums respectively have characteristics: 1. MASK ROM, and program has cured when chip dispatches from the factory, and is fit to the changeless application scenario of program; 2. FLASH can be erasable repeatedly, and dirigibility is very strong, but price is higher, is fit to the insensitive application scenario of price or does the exploitation purposes; 3. the OTP price has the One Time Programmable ability simultaneously again between between the above two, is fit to both require certain dirigibility, requires application scenario cheaply again.Constantly update, need the electronic product of rapid volume production for function, can confirm the type of font file storer according to actual needs.
The SOC chip with character library processing capacity of the embodiment of the invention; Utilize the special hardware of chip internal when realizing concrete the application, realize processing operation, can use vector font library also can use dot matrix word library character library; Applying flexible, font display effect are good; Processing speed is fast, and character library information is safer, is the stronger character library process chip of a kind of versatility.
When the liquid crystal type intelligent code key that uses present embodiment is concluded the business; Usb interface module 20 is connected with outer PC; And treat that signing messages is transferred to this liquid crystal type intelligent code key (being commonly called as liquid crystal KEY) in will concluding the business through this interface; MPU11 is transferred to character library processing module 12 with data to be displayed, and character library processing module 12 specifies good font display requirement that font file among the ROM18 is handled according to the application program of FLASH13 stored, and the font file after will finishing dealing with is transferred to LCD display 2 and shows; The user need confirm the data in the LCD display 2; And realize this is treated the affirmation of signing messages that through pressing button 3 MPU11 will carry out signature operation to data to be signed subsequently, and realizes the signature transaction flow through usb interface module 20 passbacks to PC.
Workflow by above-mentioned liquid crystal KEY can be found out; The requirement that mainly shows according to character library in the practical application among the liquid crystal KEY through the character library processing module in the SOC chip with character library processing capacity; Realization comprises specifically that to the processing of character library vector font library is to the conversion of dot matrix word library, the selection of coded format and the selection of horizontal stroke/vertical delivery etc.; Chip self processor then is mainly used in the processing that device subscription is used, and has guaranteed processing speed separately; Simultaneously through enlarging addressing space; Font file is stored among the ROM of chip internal; Compared to prior art font file is stored in the FLASH storer of chip exterior saferly, has eliminated potential safety hazard, and make the volume of whole embedded device littler thus, cost is lower.
Referring to Fig. 4, the difference of present embodiment and embodiment 1 is: present embodiment only through a FLASH storer both can realize font file, Embedded Application the COS program and with user-dependent various data storage.Adopt in the embodiment 1 ROM memory word library file, FLASH storage Embedded Application the COS program and with two reservoir designs schemes of user-dependent various data; The technical scheme of this enforcement can further be simplified the circuit structure design of SOC chip internal; The processing speed of application data is faster, and being particularly useful for the library stores device is the SOC chip internal structure design of FLSAH storer.In addition, among Fig. 4 the function of miscellaneous part and structure annexation all with embodiment 1 in corresponding components identical, repeat no more here.
Fig. 5 has the theory structure synoptic diagram of the liquid crystal type intelligent code key that the SOC chip 2 of character library processing capacity constitutes for present embodiment.These SOC chip 2 inside are not used in the ROM of memory word library file, FLASH23 ' not only store Embedded Application the COS program and with user-dependent various data, but also store font file.Liquid crystal type intelligent code key than embodiment 1; The inner structure of the liquid crystal type intelligent code key of present embodiment is further simplified; The application data processing speed is faster, and being particularly useful for the library stores device is the SOC chip internal structure design of FLSAH storer.In addition, among Fig. 5 the function of miscellaneous part and structure annexation all with embodiment 1 in corresponding components identical, repeat no more here.
The SOC chip with character library processing capacity in the embodiment of the invention will be realized concrete Embedded Application on the one hand; Guarantee to occupy the safety storing of the font file of storage space greatly on the other hand again; The processing capacity that also will have character library simultaneously is to realize the flexible demonstration of font, and this has just proposed very high requirement to the processing speed of MPU11.If depend merely on the processing that MPU11 itself realizes data; The handling property of so whole embedded device is difficult to ensure; Therefore the embodiment of the invention has added the character library processing module that is exclusively used in the font file processing through the method for hardware circuit design in the SOC chip, and the speed of comparing data processing with the mode of software realization character library processing operation is faster.Owing to be independent of the processor of chip itself, each its duty of holding concurrently that makes both: the character library processing module is specifically designed to and realizes that chip internal operates the various processing of font file, and the processor of chip self then is mainly used in the concrete application of realization equipment.Do not influencing on the basis of chip to concrete application processes speed like this, guaranteeing the speed that character library is handled, thereby improving the handling property of whole embedded device.
The embodiment of the invention stores font file wherein into through the mode that enlarges SOC chip internal ROM addressing space; Because the parts of other SOC chips such as font file and MPU are together integrated; The mode that compared to prior art font file is stored in the FLASH chip that chip exterior connects has with it guaranteed the security of font file, and has improved the speed of data transmission.Simultaneously,, therefore significantly reduced the volume of embedded device, improved portability, made the price of embedded device also have more competitive power owing to do not need again external FLASH storer.
Certainly; The SOC chip that the embodiment of the invention has the character library processing capacity also comprises the module that other are used to realize SOC chip basic function; For example timer, randomizer, interrupt system, reset circuit etc. owing to have nothing to do with summary of the invention of the present invention, here repeat no more.
In addition, utilize the SOC chip with character library processing capacity of the embodiment of the invention to process like other embedded devices such as printer, tax-control cash registers.
What be worth pointing out a bit is that the character library processing module is not limited in the realization above-mentioned functions among the present invention, in order to reach better font display effect, can add other modules according to real needs and handle operation to realize other word-base datas.All within the spirit and principle of technical scheme of the present invention, any modification of being made, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. SOC chip with character library processing capacity; Said SOC chip comprises microprocessor, library stores device, first memory and second memory; Connect through address bus; It is characterized in that said SOC chip also comprises the character library processing module that is connected with microprocessor through said address bus, be used to realize processing font file.
2. the SOC chip with character library processing capacity as claimed in claim 1 is characterized in that, said character library processing module comprises:
The coded format converting unit is used for realizing the selection of different application to the different coding form;
The character library converting unit is used for realizing the conversion of vector font library file to dot character library file according to practical application;
Dot matrix horizontal stroke/vertical delivery selected cell is used for when adopting dot character library file to carry out the font demonstration, realizing the selection of horizontal, the vertical delivery of data.
3. according to claim 1 or claim 2 SOC chip with character library processing capacity; It is characterized in that; Said microprocessor is used to control the setting of access, transmission and the parameter of said SOC data inside chips, and receives and carry out external command, to realize the concrete application of equipment; Said library stores device is used for the memory word library file, and said font file comprises vector font library file or dot character library file; The type of said library stores device comprises mask model ROM, otp memory or FLASH storer; Said first memory is the RAM storer, is used to store intermediate data; Said second memory is the FLASH storer, is used to store the Embedded Application data.
4. the SOC chip with character library processing capacity as claimed in claim 3 is characterized in that said SOC chip also comprises interface module, connects through said address bus, is used to realize and extraneous data interaction; Said interface module comprises common apparatus interface module and I/O interface module.
5. the SOC chip with character library processing capacity as claimed in claim 4 is characterized in that said SOC chip also comprises the AES coprocessor, connects through said address bus, is used to realize the encryption and decryption to the chip internal application data.
6. SOC chip with character library processing capacity; Said SOC chip comprises microprocessor, first memory and second memory; Connect through address bus; It is characterized in that said SOC chip also comprises the character library processing module that is connected with microprocessor through said address bus, be used to realize processing font file.
7. the SOC chip with character library processing capacity as claimed in claim 6 is characterized in that, said character library processing module comprises:
The coded format converting unit is used for realizing the selection of different application to the different coding form;
The character library converting unit is used for realizing the conversion of vector font library file to dot character library file according to practical application;
Dot matrix horizontal stroke/vertical delivery selected cell is used for when adopting dot character library file to carry out the font demonstration, realizing the selection of horizontal, the vertical delivery of data.
8. like claim 6 or 7 described SOC chips with character library processing capacity; It is characterized in that; Said microprocessor is used to control the setting of access, transmission and the parameter of said SOC data inside chips, and receives and carry out external command, to realize the concrete application of equipment; Said first memory is the RAM storer, is used to store intermediate data; Said second memory is the FLASH storer, is used to store Embedded Application data and font file; Said font file comprises vector font library file or dot character library file.
9. the SOC chip with character library processing capacity as claimed in claim 8 is characterized in that said SOC chip also comprises interface module, connects through said address bus, is used to realize and extraneous data interaction; Said interface module comprises common apparatus interface module and I/O interface module.
10. the SOC chip with character library processing capacity as claimed in claim 9 is characterized in that said SOC chip also comprises the AES coprocessor, connects through said address bus, is used to realize the encryption and decryption to the chip internal application data.
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| CN2011103437276A CN102426565A (en) | 2011-11-03 | 2011-11-03 | SOC (System on Chip) chip with font processing function |
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| CN2011103437276A CN102426565A (en) | 2011-11-03 | 2011-11-03 | SOC (System on Chip) chip with font processing function |
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| CN103745710A (en) * | 2013-12-04 | 2014-04-23 | 西安诺瓦电子科技有限公司 | Text information playing device and method |
| CN109358901A (en) * | 2018-12-06 | 2019-02-19 | 深圳高通半导体有限公司 | A kind of processor chips and implementation method of decodable code dot matrix word library |
| CN109992221A (en) * | 2019-04-12 | 2019-07-09 | 深圳高通半导体有限公司 | A kind of implementation method of the processor chips for vector font library operation |
| CN112114798A (en) * | 2020-09-25 | 2020-12-22 | 深圳市易优电气有限公司 | Display method, device, terminal and storage medium of LCD |
| CN112230873A (en) * | 2020-10-14 | 2021-01-15 | 天津津航计算技术研究所 | Display processing method based on DSP |
| CN113806278A (en) * | 2021-09-13 | 2021-12-17 | 珠海趣印科技有限公司 | Word stock chip processing method capable of arbitrarily changing vector word stock and word stock chip |
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| CN112230873A (en) * | 2020-10-14 | 2021-01-15 | 天津津航计算技术研究所 | Display processing method based on DSP |
| CN112230873B (en) * | 2020-10-14 | 2022-07-08 | 天津津航计算技术研究所 | Display processing method based on DSP |
| CN113806278A (en) * | 2021-09-13 | 2021-12-17 | 珠海趣印科技有限公司 | Word stock chip processing method capable of arbitrarily changing vector word stock and word stock chip |
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Application publication date: 20120425 |