CN110879693A - Printing data transmission method, terminal, printer and printing system - Google Patents
Printing data transmission method, terminal, printer and printing system Download PDFInfo
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- CN110879693A CN110879693A CN201911021453.1A CN201911021453A CN110879693A CN 110879693 A CN110879693 A CN 110879693A CN 201911021453 A CN201911021453 A CN 201911021453A CN 110879693 A CN110879693 A CN 110879693A
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- 238000007639 printing Methods 0.000 title claims abstract description 105
- 230000005540 biological transmission Effects 0.000 title claims abstract description 91
- 238000000034 method Methods 0.000 title claims abstract description 50
- 125000004122 cyclic group Chemical group 0.000 claims description 9
- 238000004590 computer program Methods 0.000 claims description 7
- 230000008901 benefit Effects 0.000 description 6
- 230000006837 decompression Effects 0.000 description 5
- 238000007906 compression Methods 0.000 description 4
- 230000006835 compression Effects 0.000 description 4
- 238000004891 communication Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 238000010295 mobile communication Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013144 data compression Methods 0.000 description 1
- 238000013500 data storage Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/12—Digital output to print unit, e.g. line printer, chain printer
- G06F3/1201—Dedicated interfaces to print systems
- G06F3/1202—Dedicated interfaces to print systems specifically adapted to achieve a particular effect
- G06F3/1203—Improving or facilitating administration, e.g. print management
- G06F3/1209—Improving or facilitating administration, e.g. print management resulting in adapted or bridged legacy communication protocols, e.g. emulation, protocol extension
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
- G06F21/60—Protecting data
- G06F21/606—Protecting data by securing the transmission between two devices or processes
- G06F21/608—Secure printing
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/12—Digital output to print unit, e.g. line printer, chain printer
- G06F3/1201—Dedicated interfaces to print systems
- G06F3/1202—Dedicated interfaces to print systems specifically adapted to achieve a particular effect
- G06F3/1222—Increasing security of the print job
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/12—Digital output to print unit, e.g. line printer, chain printer
- G06F3/1201—Dedicated interfaces to print systems
- G06F3/1223—Dedicated interfaces to print systems specifically adapted to use a particular technique
- G06F3/1237—Print job management
- G06F3/1238—Secure printing, e.g. user identification, user rights for device usage, unallowed content, blanking portions or fields of a page, releasing held jobs
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/12—Digital output to print unit, e.g. line printer, chain printer
- G06F3/1201—Dedicated interfaces to print systems
- G06F3/1278—Dedicated interfaces to print systems specifically adapted to adopt a particular infrastructure
- G06F3/1285—Remote printer device, e.g. being remote from client or server
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- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Human Computer Interaction (AREA)
- Computer Security & Cryptography (AREA)
- Health & Medical Sciences (AREA)
- Bioethics (AREA)
- General Health & Medical Sciences (AREA)
- Computer Hardware Design (AREA)
- Software Systems (AREA)
- Accessory Devices And Overall Control Thereof (AREA)
Abstract
The invention discloses a printing data transmission method, a terminal, a printer and a printing system, wherein after the terminal establishes NFC connection with the printer, a command and data to be sent by the terminal are compressed firstly, the command and the data are encrypted, then a printing command head, an NFC transmission identifier and CRC check code are added, the command and the data are sent to the printer through an NFC driving program, after the printer receives the command and the data, the data are decompressed according to the information of the printing command head after the CRC check code is verified to be error-free, the original command and data sent by the terminal are obtained, the data transmission can be completed safely and reliably, in addition, the NFC is adopted for data transmission, the NFC connection can be quickly established when the terminal is close to the NFC antenna position of the printer, the pairing step is omitted, and the printing system is quick and convenient.
Description
Technical Field
The invention relates to the technical field of communication, in particular to a printing data transmission method, a terminal, a printer and a printing system.
Background
The portable printer has the advantages that the traditional mode that the printer uses a cable to transmit the printing data is abandoned, and the wireless communication technology is adopted to transmit the printing data. There are various wireless communication technologies, such as Zigbee, bluetooth, WIFI, and the like. Most portable printer at present realizes printing data transmission with the bluetooth mostly, but uses bluetooth equipment to pair earlier, only successfully pairs, just can use, and is not high-efficient enough, and user experience is relatively poor.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide a printing data transmission method, a terminal, a printer and a printing system, which can safely, reliably and efficiently complete printing data transmission.
The technical scheme adopted by the invention for solving the problems is as follows:
an embodiment of a first aspect of the present invention provides a print data transmission method, which is applied to a terminal, and includes:
establishing an NFC connection with a printer;
compressing commands and data to be sent to a printer to obtain compressed data;
adding a printing command head to the compressed data to obtain printing data;
adding an NFC transmission identifier on the head part of the printing data and adding a CRC (cyclic redundancy check) code on the tail part of the printing data to obtain NFC transmission data;
and transmitting the NFC transmission data to a printer.
The embodiment of the second aspect of the invention provides a printing data transmission method, which is applied to a printer and comprises the following steps:
establishing NFC connection with a terminal;
receiving NFC transmission data sent by a terminal through NFC;
an NFC transfer identifier that identifies a header of the NFC transfer data;
obtaining printing data after the CRC check code at the tail part of the NFC transmission data is verified to be correct;
and decompressing the compressed data behind the printing command head according to the printing command head in the printing data to obtain the command and the data sent by the terminal.
An embodiment of a third aspect of the present invention provides a print data transmission method, applied to a printing system, including:
the printer establishes NFC connection with the terminal;
the terminal compresses commands and data to be sent to the printer to obtain compressed data;
adding a printing command head to the compressed data by the terminal to obtain printing data;
adding an NFC transmission identifier on the head of the printing data and adding a CRC (cyclic redundancy check) code on the tail of the printing data by the terminal to obtain NFC transmission data;
the terminal transmits the NFC transmission data to a printer;
the printer receives NFC transmission data sent by the terminal through NFC;
a printer identifies an NFC transfer identifier of a header of the NFC transfer data;
the printer obtains printing data after verifying that the CRC code at the tail of the NFC transmission data is correct;
and the printer decompresses the compressed data behind the printing command head according to the printing command head in the printing data to obtain the command and the data sent by the terminal.
According to some embodiments of the invention, the print command header includes processing instructions of the printer and a length of the compressed data.
The printing data transmission method provided by the embodiment of the invention at least has the following beneficial effects: after the terminal is connected with the printer through NFC, commands and data to be sent by the terminal are compressed firstly, the commands and the data are encrypted, then a command head is printed, NFC transmission identifiers and CRC check codes are checked, the commands and the data are sent to the printer through an NFC driving program, after the printer receives the commands and the data, after no error is verified through the CRC check codes, the data are decompressed according to information of the command head, original commands and data sent by the terminal are obtained, data transmission can be completed safely and reliably, data are transmitted through NFC, NFC connection can be quickly established when the terminal is close to an NFC antenna of the printer, the step of pairing is omitted, and the method is quick and convenient.
An embodiment of a fourth aspect of the present invention provides a terminal, including: a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the print data transmission method as described in the embodiments of the first aspect above when executing the computer program.
An embodiment of a fifth aspect of the present invention provides a printer, including: a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the print data transmission method as described in the embodiment of the second aspect when executing the computer program.
An embodiment of a sixth aspect of the present invention provides a printing system, including a terminal and a printer: the printer establishes NFC connection with the terminal;
the terminal compresses commands and data to be sent to the printer to obtain compressed data;
adding a printing command head to the compressed data by the terminal to obtain printing data;
adding an NFC transmission identifier on the head of the printing data and adding a CRC (cyclic redundancy check) code on the tail of the printing data by the terminal to obtain NFC transmission data;
the terminal transmits the NFC transmission data to a printer;
the printer receives NFC transmission data sent by the terminal through NFC;
a printer identifies an NFC transfer identifier of a header of the NFC transfer data;
the printer obtains printing data after verifying that the CRC code at the tail of the NFC transmission data is correct;
and the printer decompresses the compressed data behind the printing command head according to the printing command head in the printing data to obtain the command and the data sent by the printer.
A seventh aspect embodiment of the present invention provides a computer-readable storage medium storing computer-executable instructions for performing the print data transmission method described in the first, second, or third aspect embodiment.
Additional features and advantages of the application will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the application. The objectives and other advantages of the application may be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
The invention is further illustrated with reference to the following figures and examples.
Fig. 1 is a flowchart of a print data transmission method provided in an embodiment of a first aspect of the present invention;
FIG. 2 is a flow chart of a print data transmission method according to an embodiment of a second aspect of the present invention;
FIG. 3 is a flow chart of a print data transmission method according to an embodiment of the third aspect of the present invention;
fig. 4 is a schematic structural diagram of a terminal according to a fourth embodiment of the present invention;
FIG. 5 is a schematic structural diagram of a printer according to an embodiment of a fifth aspect of the present invention;
fig. 6 is a schematic diagram of a print data transmission method according to an embodiment of the third aspect of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
It should be noted that, if not conflicted, the various features of the embodiments of the invention may be combined with each other within the scope of protection of the invention. Additionally, while functional block divisions are performed in apparatus schematics, with logical sequences shown in flowcharts, in some cases, steps shown or described may be performed in sequences other than block divisions in apparatus or flowcharts.
Referring to fig. 1, a print data transmission method according to an embodiment of a first aspect of the present invention is applied to a terminal, and includes the steps of:
s100: establishing an NFC connection with a printer;
s200: compressing commands and data to be sent to a printer to obtain compressed data;
s300: adding a printing command head to the compressed data to obtain printing data;
s400: adding an NFC transmission identifier on the head part of the printing data and adding a CRC (cyclic redundancy check) code on the tail part of the printing data to obtain NFC transmission data;
s500: and transmitting the NFC transmission data to a printer.
Referring to fig. 2, a print data transmission method according to an embodiment of a second aspect of the present invention is applied to a printer, including:
a100: establishing NFC connection with a terminal;
a200: receiving NFC transmission data sent by a terminal through NFC;
a300: an NFC transfer identifier that identifies a header of the NFC transfer data;
a400: obtaining printing data after the CRC check code at the tail part of the NFC transmission data is verified to be correct;
a500: and decompressing the compressed data behind the printing command head according to the printing command head in the printing data to obtain the command and the data sent by the terminal.
Referring to fig. 3 and 6, a print data transmission method according to an embodiment of a third aspect of the present invention is applied to a printing system, including:
t100: the printer establishes NFC connection with the terminal;
t200: the terminal compresses commands and data to be sent to the printer to obtain compressed data;
t300: adding a printing command head to the compressed data by the terminal to obtain printing data;
t400: adding an NFC transmission identifier on the head of the printing data and adding a CRC (cyclic redundancy check) code on the tail of the printing data by the terminal to obtain NFC transmission data;
t500: the terminal transmits the NFC transmission data to a printer;
t600: the printer receives NFC transmission data sent by the terminal through NFC;
t700: a printer identifies an NFC transfer identifier of a header of the NFC transfer data;
t800: the printer obtains printing data after verifying that the CRC code at the tail of the NFC transmission data is correct;
t900: and the printer decompresses the compressed data behind the printing command head according to the printing command head in the printing data to obtain the command and the data sent by the terminal.
In some embodiments of the invention, the print command header includes processing instructions for the printer and a length of the compressed data.
For example, the print command header is: 0x1D 0x81 len, where 0x1D is the command identifier, 0x81 is the command parameter, len is the data length, 2 bytes long, indicating that len long compressed data follows, and further decompression is required to get the original data.
The compression algorithm selected in step S300 and step T300 is LZO, the LZO algorithm is a fast lossless data compression and decompression algorithm, the decompression speed of the LZO is faster than the compression speed thereof, but the compression ratio thereof can be freely adjusted as required, and the decompression speed is not affected. The algorithm decompression is simple, and the memory support is not needed; and LZO can provide lossless compression. The advantages of the LZO base are especially suitable for embedded devices (resource-limited devices). Another benefit of compressing the data is that it is encrypted so that the customer's data is not simply exposed to the atmosphere.
According to the printing data transmission method provided by the embodiment of the invention, after the terminal is connected with the printer in an NFC mode, commands and data to be sent by the terminal are compressed, the commands and the data are encrypted, then a printing command header, an NFC transmission identifier and a CRC check code are added, the commands and the data are sent to the printer through an NFC driving program, after the commands and the data are received by the printer and verified to be error-free through the CRC check code, the data are decompressed according to information of the printing command header, the original commands and data sent by the terminal are obtained, data transmission can be completed safely and reliably, data are transmitted by adopting the NFC, the NFC connection can be quickly established when the terminal is close to an NFC antenna of the printer, the step of pairing is omitted, and the printing data transmission method is quick and convenient.
Referring to fig. 4, the fourth embodiment of the present invention further provides a terminal, such as a mobile phone, a tablet computer, a personal computer, etc.
Specifically, the terminal 100 includes: one or more processors 101 and memory 102, one processor 101 being illustrated in fig. 4.
The processor 101 and the memory 102 may be connected by a bus or other means, such as the bus connection shown in fig. 4.
The memory 102, which is a non-transitory computer-readable storage medium, may be used to store non-transitory software programs, non-transitory computer-executable programs, and modules, such as program instructions/modules corresponding to the print data transmission method in the embodiment of the first aspect of the present invention.
The memory 102 may include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application program required for at least one function. Further, the memory 102 may include high speed random access memory, and may also include non-transitory memory, such as at least one magnetic disk storage device, flash memory device, or other non-transitory solid state storage device. In some embodiments, the memory 102 may optionally include memory located remotely from the processor 101, which may be connected to the terminal 100 via a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The one or more modules are stored in the memory 102 and, when executed by the one or more processors 101, perform the print data transmission method in the above-described method embodiments, e.g., perform the above-described method steps S100 to S500 in fig. 1.
Referring to fig. 5, the fifth embodiment of the invention also provides a printer.
Specifically, the printer 200 includes: one or more processors 201 and memory 202, with one control processor 201 being illustrated in fig. 5.
The processor 201 and the memory 202 may be connected by a bus or other means, and fig. 5 illustrates the connection by a bus as an example.
The memory 202, which is a non-transitory computer-readable storage medium, may be used to store non-transitory software programs, non-transitory computer-executable programs, and modules, such as program instructions/modules corresponding to the print data transmission method in the embodiment of the first aspect of the present invention.
The memory 202 may include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function. Further, the memory 202 may include high speed random access memory, and may also include non-transitory memory, such as at least one magnetic disk storage device, flash memory device, or other non-transitory solid state storage device. In some embodiments, memory 202 may optionally include memory located remotely from processor 201, which may be connected to printer 200 via a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The one or more modules are stored in the memory 202 and, when executed by the one or more processors 201, perform the print data transmission method in the above-described method embodiments, e.g., performing the above-described method steps a100 to a500 in fig. 2.
An embodiment of a sixth aspect of the present invention provides a printing system, including a terminal and a printer:
t100: the printer establishes NFC connection with the terminal;
t200: the terminal compresses commands and data to be sent to the printer to obtain compressed data;
t300: adding a printing command head to the compressed data by the terminal to obtain printing data;
t400: adding an NFC transmission identifier on the head of the printing data and adding a CRC (cyclic redundancy check) code on the tail of the printing data by the terminal to obtain NFC transmission data;
t500: the terminal transmits the NFC transmission data to a printer;
t600: the printer receives NFC transmission data sent by the terminal through NFC;
t700: a printer identifies an NFC transfer identifier of a header of the NFC transfer data;
t800: the printer obtains printing data after verifying that the CRC code at the tail of the NFC transmission data is correct;
t900: and the printer decompresses the compressed data behind the printing command head according to the printing command head in the printing data to obtain the command and the data sent by the printer.
It should be noted that, since the printing system in the present embodiment is based on the same inventive concept as the above-mentioned print data transmission method, the corresponding contents in the method embodiment are also applicable to the present embodiment, and are not described in detail herein.
A seventh embodiment of the invention provides a computer-readable storage medium storing computer-executable instructions for execution by one or more processors, for example, to perform the above-described method steps S100 to S500 in fig. 1, method steps a100 to a500 in fig. 2, and method steps T100 to T900 in fig. 3.
Through the above description of the embodiments, those skilled in the art can clearly understand that the embodiments can be implemented by software plus a general hardware platform. Those skilled in the art will appreciate that all or part of the processes of the methods of the above embodiments may be implemented by hardware related to instructions of a computer program, which may be stored in a computer readable storage medium, and when executed, may include the processes of the embodiments of the methods described above. The storage medium may be a magnetic disk, an optical disk, a Read Only Memory (ROM), a Random Access Memory (RAM), or the like.
While the preferred embodiments of the present invention have been described in detail, it will be understood by those skilled in the art that the foregoing and various other changes, omissions and deviations in the form and detail thereof may be made without departing from the scope of this invention.
Claims (10)
1. A printing data transmission method is applied to a terminal and is characterized by comprising the following steps:
establishing an NFC connection with a printer;
compressing commands and data to be sent to a printer to obtain compressed data;
adding a printing command head to the compressed data to obtain printing data;
adding an NFC transmission identifier on the head part of the printing data and adding a CRC (cyclic redundancy check) code on the tail part of the printing data to obtain NFC transmission data;
and transmitting the NFC transmission data to a printer.
2. The print data transmission method according to claim 1, wherein the print command header includes a processing instruction of a printer and a length of the compressed data.
3. A printing data transmission method is applied to a printer and is characterized by comprising the following steps:
establishing NFC connection with a terminal;
receiving NFC transmission data sent by a terminal through NFC;
an NFC transfer identifier that identifies a header of the NFC transfer data;
obtaining printing data after the CRC check code at the tail part of the NFC transmission data is verified to be correct;
and decompressing the compressed data behind the printing command head according to the printing command head in the printing data to obtain the command and the data sent by the terminal.
4. The print data transmission method according to claim 3, wherein the print command header includes a processing instruction of a printer and a length of the compressed data.
5. A printing data transmission method is applied to a printing system and is characterized by comprising the following steps:
the printer establishes NFC connection with the terminal;
the terminal compresses commands and data to be sent to the printer to obtain compressed data; adding a printing command head to the compressed data by the terminal to obtain printing data;
adding an NFC transmission identifier on the head of the printing data and adding a CRC (cyclic redundancy check) code on the tail of the printing data by the terminal to obtain NFC transmission data;
the terminal transmits the NFC transmission data to a printer;
the printer receives NFC transmission data sent by the terminal through NFC;
a printer identifies an NFC transfer identifier of a header of the NFC transfer data;
the printer obtains printing data after verifying that the CRC code at the tail of the NFC transmission data is correct;
and the printer decompresses the compressed data behind the printing command head according to the printing command head in the printing data to obtain the command and the data sent by the terminal.
6. The print data transmission method according to claim 5, wherein the print command header includes a processing instruction of a printer and a length of the compressed data.
7. A terminal, comprising: memory, processor and computer program stored on the memory and executable on the processor, which when executed by the processor implements the print data transmission method according to any of claims 1 to 2.
8. A printer, comprising: memory, processor and computer program stored on the memory and executable on the processor, which when executed by the processor implements the print data transmission method according to any of claims 3 to 4.
9. A printing system comprising a terminal and a printer, characterized in that:
the printer establishes NFC connection with the terminal;
the terminal compresses commands and data to be sent to the printer to obtain compressed data;
adding a printing command head to the compressed data by the terminal to obtain printing data;
adding an NFC transmission identifier on the head of the printing data and adding a CRC (cyclic redundancy check) code on the tail of the printing data by the terminal to obtain NFC transmission data;
the terminal transmits the NFC transmission data to a printer;
the printer receives NFC transmission data sent by the terminal through NFC;
a printer identifies an NFC transfer identifier of a header of the NFC transfer data;
the printer obtains printing data after verifying that the CRC code at the tail of the NFC transmission data is correct;
and the printer decompresses the compressed data behind the printing command head according to the printing command head in the printing data to obtain the command and the data sent by the printer.
10. A computer-readable storage medium storing computer-executable instructions for performing the print data transmission method of any one of claims 1 to 2 or for performing the print data transmission method of any one of claims 3 to 4 or for performing the print data transmission method of any one of claims 5 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911021453.1A CN110879693A (en) | 2019-10-25 | 2019-10-25 | Printing data transmission method, terminal, printer and printing system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911021453.1A CN110879693A (en) | 2019-10-25 | 2019-10-25 | Printing data transmission method, terminal, printer and printing system |
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| CN110879693A true CN110879693A (en) | 2020-03-13 |
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| CN201911021453.1A Pending CN110879693A (en) | 2019-10-25 | 2019-10-25 | Printing data transmission method, terminal, printer and printing system |
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| JP2016027453A (en) * | 2014-07-01 | 2016-02-18 | キヤノン株式会社 | Information processing system and control method thereof |
| CN105389138A (en) * | 2014-08-25 | 2016-03-09 | 佳能株式会社 | Printing apparatus, portal terminal, control method of portal terminal and printing system |
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2019
- 2019-10-25 CN CN201911021453.1A patent/CN110879693A/en active Pending
Patent Citations (4)
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| US7199891B1 (en) * | 1999-08-19 | 2007-04-03 | Sony Corporation | Image processing method and apparatus, printing method and apparatus, image printing system and method and recording medium |
| JP2012160207A (en) * | 2012-04-27 | 2012-08-23 | Canon Inc | Information processor and program |
| JP2016027453A (en) * | 2014-07-01 | 2016-02-18 | キヤノン株式会社 | Information processing system and control method thereof |
| CN105389138A (en) * | 2014-08-25 | 2016-03-09 | 佳能株式会社 | Printing apparatus, portal terminal, control method of portal terminal and printing system |
Non-Patent Citations (3)
| Title |
|---|
| 王晓华: "《NFC技术基础篇》", 30 June 2017, 北京航空航天大学出版社, pages: 41 - 42 * |
| 蒋明礼等: "《微型计算机硬件组成》", 31 October 2000, 机械工业出版社, pages: 165 - 166 * |
| 高飞: "《EDA技术基础》", 31 March 2013, 中山大学出版社, pages: 179 - 180 * |
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