CN101415017A - Method for transmitting embedded system document based on telnet protocol - Google Patents
Method for transmitting embedded system document based on telnet protocol Download PDFInfo
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- CN101415017A CN101415017A CNA2007101759531A CN200710175953A CN101415017A CN 101415017 A CN101415017 A CN 101415017A CN A2007101759531 A CNA2007101759531 A CN A2007101759531A CN 200710175953 A CN200710175953 A CN 200710175953A CN 101415017 A CN101415017 A CN 101415017A
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Abstract
The invention discloses an embedded system file transmission method based on a telnet protocol, relating to the file transmission technique of embedded systems and aiming at solving the inconvenient maintenance of the existing embedded system. In order to solve the problem, the proposal comprises the steps as follows: A. a local host machine sends file reading/writing instructions to the embedded system by the Telnet protocol; B. after the file reading/writing instruction is received, the embedded system distributes the cache area for the file; C. the caches are cut for the file to be read or written according to the size of the distributed cache area; furthermore, the cached file data is printed to the local host machine or written into the embedded system. The method is simple and practical and the embedded system can still realize the file transmission when supporting the serial port only.
Description
Technical field
The present invention relates to the file transfer technology of embedded system, relate in particular to a kind of embedded system document transmission method based on Telnet (Telnet) agreement.
Background technology
Embedded system uses the serial ports that is simple and easy to usefulness to carry out software debugging and exploitation usually, and during in the embedded system breakdown maintenance or to its software upgrading, can only send equipment back to factory, use special-purpose Flash to read the file system of installing among the Flash in the equipment fetch equipment, analyzing failure cause, or by special-purpose Flash write device refresh routine is write.Like this, will be quite high to the independent maintenance cost of embedded system.And for the network system that embedded system is the master, the cost of safeguarding will become the important cost factor of operator separately.
At the problems referred to above, embedded system generally also is provided with network interface, and to carry out telefile transmission and Long-distance Control etc., this makes things convenient for remote maintenance.Though the setting of network interface has made things convenient for the maintenance of embedded system, and between the main frame during information interaction resource overhead bigger, and be unfavorable for maintenance to the limited embedded system of disposal ability.In case and network interface damage, network congestion or network failure will have to safeguard by the embedded system that network interface is not set.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of embedded system document transmission method based on Telnet, with the telefile transmission of real-time support embedded system, convenient maintenance to embedded system.
For achieving the above object, technical scheme of the present invention is achieved in that
A kind of embedded system document transmission method based on Telnet comprises:
A, local host send the read/write file instruction by Telnet Telnet agreement to embedded system;
B, receive the read/write file instruction after, the buffer area of embedded system allocate file;
C, will continue/written document by distribution buffer area size cut apart buffer memory, and the file data of institute's buffer memory is printed to local host or writes embedded system.
Wherein, reading file among the step C comprises:
C1, embedded system open file, and distribute buffer size setting to read the number of times of file data, reading of data amount at every turn according to file size and institute;
C2, successively file data is read buffer area, and file data in the buffer area is printed to local host by the Telnet agreement.
Wherein, written document comprises among the described step C:
C11, local host inquiry buffer size that embedded system is distributed, and according to the number of times of file size setting transmission file to be written, each transmitted data amount;
C12, successively file data to be written is transferred to buffer area that embedded system is distributed, and file data in the buffer area is written to respective memory regions by embedded system by the Telnet agreement.
Wherein, described embedded system is by the Telnet physical connection of serial ports or network interface support and local host.
The present invention realizes and being connected of embedded system by the Telnet agreement, and by the instruction transmission between foundation of Telnet agreement and the embedded system, thereby finish writing and reading of embedded system file, realize the embedded system file maintenance under the support of Telnet agreement.The present invention is simple and practical, and embedded system is only supported still can realize file transfer under the serial ports situation.
Description of drawings
Fig. 1 is the flow chart that the present invention is based on the embedded system document transmission method of Telnet.
Embodiment
Core concept of the present invention is: embedded system is used comparatively extensive in communication network, is an important ring in the network operation to its maintenance.Present embedded system is not all supported remote maintenance, and those of network interface particularly are not set, and does not support the embedded system of remote maintenance must send factory back to and safeguards that by Special Equipment this has increased the maintenance cost of embedded system undoubtedly.The present invention is directed to this situation, adopt the Telnet agreement to realize information interaction with embedded system, thereby finish reading and writing of file in the embedded system, thereby realize fault detect and file maintenance embedded system.The present invention need not to make embedded system special configuration network interface, can realize also that by serial ports the file of embedded system writes and reads.The present invention is simple and practical, and embedded system is only supported still can realize file transfer under the serial ports situation.Describe the present invention below in conjunction with accompanying drawing.
Fig. 1 is the flow chart that the present invention is based on the embedded system document transmission method of Telnet, and as shown in Figure 1, the embedded system document transmission method that the present invention is based on Telnet may further comprise the steps:
Step 101: the Telnet agreement support of setting up embedded system.Be embedded system Telnet agreement corresponding software is installed.The purpose of this step is to make embedded system support the Telnet agreement, to realize the Telnet control to embedded system.Telnet is a VTP in the ICP/IP protocol bunch, and it allows to be connected to distance host.By using telnet command, remote equipment can be used as a virtual terminal and carries out Telnet, can also check the availability of the application layer software of Source Site and purpose website.It is less that Telnet mode network connects shared resource, can finish message transmission quickly; Fully by keyboard operation, operate fastly, and the powerful of Telnet enriched again.Telnet uses more extensive.Because Telnet protocol application technology is a known technology, the present invention repeats no more.
Step 102: local host sends the read/write file instruction by Telnet Telnet agreement to embedded system.Finish by local host and to treat the Telnet login of safeguarding embedded system, and send the read/write file instruction to this embedded system.Because the support of Telnet agreement is arranged, local host is equivalent to direct operation to embedded system to the remote operation of embedded system.
Step 103: after receiving the read/write file instruction, the buffer area of embedded system allocate file.After embedded system receives the read/write file instruction, in its Flash, distribute a read/write file dedicated cache district, to realize the transmission of file.The buffer area of this distribution generally can be very not big, specifically decides according to the current available Flash capacity of embedded system, as 1K etc.
Step 104: will continue/written document by distribution buffer area size cut apart buffer memory, and the file data of institute's buffer memory is printed to local host or writes embedded system.At the characteristic of embedded system, when the bigger file of transmitted data amount, need handle respectively file data is separated.Below describe it in detail.
The mode of reading file from embedded system is: embedded system receives to be read to open this document behind the file command, and local host distributes buffer size setting to read the number of times of file data, reading of data amount at every turn according to file size and institute.For example desiring to read file is 1M, and the buffer memory that embedded system is distributed is 1K, and the number of times of then determining to read file is 1024 times, and each reading of data amount is 1K.Successively file data is read buffer area, and file data in the buffer area is printed to local host by the Telnet agreement.Reading the file data amount can realize by pointer technique.
To the mode of embedded system written document by: local host inquiry embedded system is distributed buffer size, and sets the number of times of transmission file to be written, transmitted data amount at every turn according to file size.Telnet by the Telnet agreement can inquire quickly distribute buffer size, perhaps store about constant volume of buffer memory that embedded system is distributed.Successively file data to be written is transferred to buffer area that embedded system is distributed, and file data in the buffer area is written to respective memory regions by embedded system.
The above is preferred embodiment of the present invention only, is not to be used to limit protection scope of the present invention.
Claims (4)
1, a kind of embedded system document transmission method based on Telnet is characterized in that this method comprises:
A, local host send the read/write file instruction by Telnet Telnet agreement to embedded system;
B, receive the read/write file instruction after, the buffer area of embedded system allocate file;
C, will continue/written document by distribution buffer area size cut apart buffer memory, and the file data of institute's buffer memory is printed to local host or writes embedded system.
2, the embedded system document transmission method based on Telnet according to claim 1 is characterized in that, reads file among the step C and comprises:
C1, embedded system open file, and local host distributes buffer size setting to read the number of times of file data, reading of data amount at every turn according to file size and institute;
C2, successively file data is read buffer area, and file data in the buffer area is printed to local host by the Telnet agreement.
3, the embedded system document transmission method based on Telnet according to claim 1 is characterized in that written document comprises among the described step C:
C11, local host inquiry buffer size that embedded system is distributed, and according to the number of times of file size setting transmission file to be written, each transmitted data amount;
C12, successively file data to be written is transferred to buffer area that embedded system is distributed, and file data in the buffer area is written to respective memory regions by embedded system by the Telnet agreement.
According to each described embedded system document transmission method in the claim 1 to 3, it is characterized in that 4, described embedded system is by the Telnet physical connection of serial ports or network interface support and local host based on Telnet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101759531A CN101415017A (en) | 2007-10-16 | 2007-10-16 | Method for transmitting embedded system document based on telnet protocol |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101759531A CN101415017A (en) | 2007-10-16 | 2007-10-16 | Method for transmitting embedded system document based on telnet protocol |
Publications (1)
| Publication Number | Publication Date |
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| CN101415017A true CN101415017A (en) | 2009-04-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNA2007101759531A Pending CN101415017A (en) | 2007-10-16 | 2007-10-16 | Method for transmitting embedded system document based on telnet protocol |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012006898A1 (en) * | 2010-07-13 | 2012-01-19 | 中兴通讯股份有限公司 | Embedded system and method for implementing virtual screen thereof |
| CN102546769A (en) * | 2011-12-23 | 2012-07-04 | 福建升腾资讯有限公司 | Method for automatically transmitting files of USB (universal serial bus) flash disk of user based on Telnet protocol |
| CN102956027A (en) * | 2011-08-30 | 2013-03-06 | 安凯(广州)微电子技术有限公司 | Image enhancement processing system and method based on camera image processing chip |
| CN106293494A (en) * | 2015-05-18 | 2017-01-04 | 高德软件有限公司 | The method and device of reading information, the method and device of write information |
| CN110753039A (en) * | 2019-09-29 | 2020-02-04 | 苏州浪潮智能科技有限公司 | Method and device for remote login safety protection |
-
2007
- 2007-10-16 CN CNA2007101759531A patent/CN101415017A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012006898A1 (en) * | 2010-07-13 | 2012-01-19 | 中兴通讯股份有限公司 | Embedded system and method for implementing virtual screen thereof |
| CN102956027A (en) * | 2011-08-30 | 2013-03-06 | 安凯(广州)微电子技术有限公司 | Image enhancement processing system and method based on camera image processing chip |
| CN102546769A (en) * | 2011-12-23 | 2012-07-04 | 福建升腾资讯有限公司 | Method for automatically transmitting files of USB (universal serial bus) flash disk of user based on Telnet protocol |
| CN106293494A (en) * | 2015-05-18 | 2017-01-04 | 高德软件有限公司 | The method and device of reading information, the method and device of write information |
| CN106293494B (en) * | 2015-05-18 | 2020-04-10 | 高德软件有限公司 | Method and device for reading information and method and device for writing information |
| CN110753039A (en) * | 2019-09-29 | 2020-02-04 | 苏州浪潮智能科技有限公司 | Method and device for remote login safety protection |
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Application publication date: 20090422 |