CN101465839A - Transmission control method and apparatus for serial data - Google Patents
Transmission control method and apparatus for serial data Download PDFInfo
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- CN101465839A CN101465839A CNA2008102250398A CN200810225039A CN101465839A CN 101465839 A CN101465839 A CN 101465839A CN A2008102250398 A CNA2008102250398 A CN A2008102250398A CN 200810225039 A CN200810225039 A CN 200810225039A CN 101465839 A CN101465839 A CN 101465839A
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Abstract
The invention provides a serial data transmission control method and a device thereof. A data sending list is built for each serial port, after a serial port server is started up, all the serial ports are arranged to be in the open modes, and all the data operations are intercepted. The method includes the following steps: establishing sending items of terminals in a data sending list of the serial ports in advance; or after the serial port server receives subscription order which are sent by the terminals and contain serial port identifiers, establishing the sending items of the terminals in the data sending list of the serial ports corresponding to the serial port identifiers; once the data operations to the serial ports are intercepted, sending the operational data into all the sending items in the data sending list of the serial ports, and sending the data in all the sending items and the operation information corresponding to the data to the terminals corresponding to the sending items. Therefore, all the terminals subscribing the serial port operation can intercept the data operation conducted to the serial ports.
Description
Technical field
The present invention relates to the network communications technology, particularly a kind of transfer control method of serial data and device.
Background technology
When existing certain distance to need again to communicate between two terminal equipments by serial ports, often can not realize data communication by the local serial ports of terminal equipment, and serial server need be set between two terminal equipments, and the serial port drive program is installed on terminal equipment, by the local serial ports of communicating by letter with pseudo-terminal equipment between serial server and the serial port drive program.
Fig. 1 is for simulating the schematic diagram of local serial ports by serial server in the prior art, when needing to carry out serial communication between PC and the long-range miscellaneous equipment, the serial port drive program need be installed in PC, this serial port drive program by with serial server between communicate by letter and realize from the serial ports read data, data are write the parameter configuration of serial ports and serial ports etc., thereby the long-range serial ports of serial server is modeled as the local serial ports of PC, as shown in Figure 1, when PC need operate serial ports 1, send the OPEN of carrying serial ports 1 sign by the serial port drive program to serial server, serial server is set to open mode with serial ports 1; PC sends to serial server by the serial port drive program and carries serial ports 1 sign and comprise the corresponding operating information instruction, for example, read instruction, write command or parameter setting instruction, after the serial port drive program receives this instruction, according to the operation information that comprises in the instruction serial ports 1 is carried out corresponding operation, for example, receive carry the reading instruction of serial ports 1 sign after, from serial ports 1 reading of data and send to PC, receive carry serial ports 1 sign write command after, carry data in the write command that PC is sent and write serial ports 1.
Because in the said method of prior art, serial server is only carried out corresponding operation according to the instruction that receives passively, therefore, be connected in the network that is constituted with same serial server by a plurality of terminals, when one of them terminal is carried out read operation or write operation to serial data, other terminal then can't be known this behavior, yet in actual conditions, often need read operations all in this network or write operation are monitored, for example, when PC1 and PC2 are connected the control that realizes same video camera with serial server, PC1 and PC2 only can be by read operation or the independent controls that realizes video camera of write operation to serial data, and can not monitor each other which control video camera has been carried out, also just can't realize the collaborative work of controlling between PC1 and the PC2.Therefore, realize that terminal can monitor that other terminal is very necessary to the operation of serial data in many cases.
Summary of the invention
In view of this, the invention provides a kind of transfer control method and device of serial data, so that realize that terminal can monitor the operation of other terminal to serial data.
A kind of transfer control method of serial data is created data for each serial ports of serial server and is sent tabulation, and serial server is open mode with all serial port setting, and all data manipulations are intercepted after starting; This method comprises:
Data at first serial send the sending item of creating terminal in the tabulation in advance; Perhaps, after serial server received the subscription instruction that comprises the first serial sign that described terminal sends, the data that identify pairing first serial at described first serial sent the sending item of creating described terminal in the tabulation;
In case listen to described first serial is carried out data manipulation, the data of then data of operation being sent into described first serial send in all sending items in the tabulation, the data in each sending item and this data corresponding operation information are sent to the terminal of each sending item correspondence.
A kind of transmission control unit of serial data, this transmission control unit is arranged in the serial server, and this device comprises: list storage unit, main control unit and socket;
Described list storage unit, the data transmission tabulation that is used to store each serial ports;
Described main control unit is used for being open mode with all serial port setting, and all data manipulations being intercepted after described serial server starts; Data at first serial send the sending item of creating terminal in the tabulation in advance, perhaps, after receiving the subscription instruction that comprises the first serial sign that described terminal sends by described socket, the data that identify pairing first serial at described first serial send the sending item of creating described terminal in the tabulation; In case listen to described first serial is carried out data manipulation, the data of then data of operation being sent into described first serial send in all sending items in the tabulation, the data in each sending item and this data corresponding operation information are sent to the terminal of each sending item correspondence by described socket.
As can be seen from the above technical solutions, in the method and apparatus provided by the invention, serial server is no longer only carried out corresponding operation of serial-port according to the instruction that receives passively, but send tabulation by creating data for each serial ports, data at serial ports send the sending item of creating terminal in the tabulation in advance, perhaps, after receiving the subscription instruction that comprises the serial ports sign that terminal sends, identify pairing serial data at this serial ports and send the sending item of creating this terminal in the tabulation; In case listen to this serial ports is carried out data manipulation, the data of then data of operation being sent into this serial ports send in all sending items in the tabulation, the data in each sending item and this data corresponding operation information are sent to the terminal of each sending item correspondence.Make the terminal of having subscribed to this operation of serial-port can both listen to the data manipulation that this serial ports is carried out.
Description of drawings
Fig. 1 is for simulating the schematic diagram of local serial ports by serial server in the prior art;
The network connection layout schematic diagram that Fig. 2 provides for the embodiment of the invention;
The network connection diagram that the realization serial data that Fig. 3 provides for the embodiment of the invention merges;
The structure chart of the transmission control unit of the serial data that Fig. 4 provides for the embodiment of the invention;
The network connection diagram of the realization remote data transmission that Fig. 5 provides for the embodiment of the invention.
Embodiment
In order to make the purpose, technical solutions and advantages of the present invention clearer, describe the present invention below in conjunction with the drawings and specific embodiments.
Method provided by the present invention mainly comprises: create data for each serial ports and send tabulation, serial server is open mode with all serial port setting, and all data manipulations is intercepted after starting; Data at serial ports send the sending item of creating terminal in the tabulation in advance; Perhaps, after serial server receives the subscription instruction that comprises the serial ports sign that terminal sends, send the sending item of this terminal of establishment in the tabulation in the data of this corresponding serial ports of serial ports sign institute; In case listen to this serial ports is carried out data manipulation, the data of then data of operation being sent into this serial ports send in all sending items in the tabulation, the data in each sending item and this data corresponding operation information are sent to the terminal of each sending item correspondence.
Wherein, said method can be applied to the read operation of serial ports or write operation, and the data of corresponding establishment send tabulation can be respectively read data transmission tabulation and write data transmission tabulation, is that example is described in detail this method with read operation and write operation respectively below.
At first describing the read operation process, is example with annexation shown in Figure 2, supposes to realize the supervision of PC1 and 2 pairs of serial ports 1 read operations of PC, and its implementation procedure can be as follows:
For serial ports 1 and serial ports 2 are created the read data tabulation respectively.Serial server is open mode with all serial port setting, and the data manipulation on all serial ports 1 and the serial ports 2 is intercepted after starting.
After serial server starts, PC1 and PC2 send the read data that comprises serial ports 1 sign to serial server respectively and subscribe to instruction, serial server receives after read data that PC1 and PC2 send respectively subscribes to instruction, in the read data tabulation of serial ports 1, be respectively PC1 and PC2 establishment sending item, this sending item of creating can correspondingly respectively adopt PC1 and PC2 to identify, and the sending item form of its establishment can be as shown in table 1.
Table 1
| Subscribe to the terminal iidentification of this serial ports read operation | The data of read operation |
| PC1 | |
| PC2 |
In case read data from serial ports 1, these data are sent into all sending items of having created in the serial ports 1, be the sending item of PC1 and the sending item of PC2, then the data in all sending items in the read data transmission tabulation are sent to corresponding terminal PC 1 and PC2 respectively, and the read operation information in addition along with described data send shows that the data manipulation that serial ports 1 is carried out is read operation.
By above process, can realize that then PC1 and PC2 are to the supervision from serial ports 1 reading of data.
If PC1 no longer needs serial ports 1 reading of data is monitored, then can send the read data cancellation instruction of carrying serial ports 1 sign to serial server, then serial server is with the sending item deletion of PC1 in the serial ports 1.
The write operation process is described below, and is example with annexation shown in Figure 2 still, supposes to realize that PC1 and PC2 write the supervision of data to serial ports 1, and its implementation procedure can be as follows:
For serial ports 1 and serial ports 2 are created the write data tabulation respectively.Serial server is open mode with all serial port setting, and the data manipulation on all serial ports 1 and the serial ports 2 is intercepted after starting.
After serial server starts, PC1 and PC2 send the write data that comprises serial ports 1 sign to serial server respectively and subscribe to instruction, serial server receives after write data that PC1 and PC2 send respectively subscribes to instruction, in the write data tabulation of serial ports 1, be respectively PC1 and PC2 establishment sending item, this sending item of creating can correspondingly respectively adopt PC1 and PC2 to identify, and the sending item form of creating in serial ports 1 and the serial ports 2 can be as shown in table 2.
Table 2
| Subscribe to the terminal iidentification of this serial ports write operation | The data of write operation |
| PC?1 | |
| PC?2 |
After serial server receives the write command that carries serial ports 1 sign that PC3 sends, the data that this write command is comprised write serial ports 1, and these data are sent into all sending items of having created in the serial ports 1, be the sending item of PC1 and the sending item of PC2, then the data in all sending items in the write data transmission tabulation are sent to corresponding terminal PC 1 and PC2 respectively, and, also have write operation information along with what these data sent together, show to be operating as write operation to what serial ports 1 carried out.
By above process, can realize that then PC1 and PC2 write the supervision of data to serial ports 1.
If PC1 does not need the data of serial ports 1 to be carried out the supervision of write operation again, then can send the write data cancellation instruction of carrying serial ports 1 sign to serial server, then serial server is with the sending item deletion of PC1 in the serial ports 1.
In above-mentioned read operation process, can also utilize read data to send tabulation and realize data forwarding function between the serial ports.Be example still, for example, can send the sending item of establishment second serial in the tabulation in advance at the read data of serial ports 1 with structure shown in Figure 2.When serial ports 1 reads in data, the read data of these data being sent into serial ports 1 sends in all sending items of tabulation, when the read data of follow-up transmission serial ports 1 sends the data of all sending items of tabulating, these data also can be sent to serial ports 2, promptly realize after serial ports 1 reading of data, writing serial ports 2.And the PC that subscribes to serial ports 1 read operation and serial ports 2 write operations can monitor above-mentioned operation to serial ports, and for example, in said process, PC1 and PC2 can monitor the data that read from serial ports 1, also monitors simultaneously serial ports 2 is write data.
Adopt this method can realize the merging of serial data, as shown in Figure 3, in advance the read data that the read data of serial ports 1 sends tabulation and serial ports 2 send disposed the sending item of serial ports 3 in tabulating after, the data that read from serial ports 1 and serial ports 2 can both write serial ports 3.
Can also realize the distribution of serial data, for example, read data at serial ports 1 sends the sending item that disposes serial ports 2 and serial ports 3 in the tabulation in advance, the sending item of serial ports 2 and serial ports 3 read data that the data that read can be sent into serial ports 1 in the time of then from serial ports 1 reading of data sends and tabulates, and the data in this sending item are write serial ports 2 and serial ports 3 respectively, thereby realize being distributed to serial ports 2 and serial ports 3 from serial ports 1 reading of data.
In addition, in above-mentioned read operation and write operation process, the sending item type in read data tabulation or the write data tabulation can be distinguished, promptly can be set to regime type and static types.After serial server is restarted, the sending item of regime type will not exist, and the sending item of static types is retained.For example, the sending item that can the IP address fixing terminal is created is set to static types, then serial server is after restarting, can continue to send the data in the sending item of static types, guarantee the function for monitoring of this terminal to the serial data operation with this, the sending item that also can be pre-configured in read data tabulation or the write data tabulation is set to static types; The sending item that can the IP address unfixed terminal is created is set to regime type, the heartbeat message that the sending item of regime type need rely on terminal to send is kept, be that terminal sends heartbeat message to serial server at interval with regular time, if serial server does not receive the heartbeat message that this terminal sends in the default time interval, then the dynamic sending item of this terminal is deleted, can break down or IP address when upheaval in terminal like this, the continuation that stops data in the sending item of this terminal sends, thereby reduces junk data and expendable sending item in the network.
Still can adopt mode of the prior art for operations such as the parameter configuration of serial ports and inquiries, be that terminal sends the instruction that comprises parameter configuration to serial server, serial server utilizes the parameter configuration in this instruction that serial ports is configured, wherein, configuration information can be baud rate information, verification type information, data bit information or the position of rest information etc. of serial ports; Terminal sends the instruction that comprises Query Information to serial ports, and serial server utilizes the Query Information in this instruction that com-state is inquired about, and returns to terminal.
More than be the description that method provided by the present invention is carried out, below device provided by the present invention be described in detail.The structure chart of the transmission control unit of the serial data that Fig. 4 provides for the embodiment of the invention, this device is arranged in the serial server, and as shown in Figure 4, this device can comprise: list storage unit 401, socket 402 and main control unit 403.
Different according to the read operation demand of terminal and write operation demand can exist following two kinds of situations or its combination:
The data of one, 401 storages of list storage unit send tabulation and send tabulation for read data.
Two, the data of list storage unit 401 storages send tabulation and send tabulation for write data.
On the basis of above two kinds of situations, main control unit 403 can also be used for restarting the sending item that the back keeps list storage unit 401 all static types at serial server, does not keep the sending item of all regime types in the list storage unit 401.
In addition, this device can also comprise: overtime detecting unit 404 is used to detect the time that 403 the last times of current distance main control unit receive the heartbeat message of this terminal.
Usually terminal is when serial ports writes data, the command word that can carry this protocol type in data according to the employed protocol type of destination device, the main control unit 503 of serial server can be converted to the protocol type data that the destination device of these data is supported according to the data that the command word of carrying in these data will write serial ports.
By above description as can be seen, the method and apparatus that provides of the embodiment of the invention can have the following advantages:
1) in the method and apparatus provided by the invention, serial server is no longer only carried out corresponding operation of serial-port according to the instruction that receives passively, but send tabulation by creating data for each serial ports, data at serial ports send the sending item of creating terminal in the tabulation in advance, perhaps, after receiving the subscription instruction that comprises the serial ports sign that terminal sends, identify pairing serial data at this serial ports and send the sending item of creating this terminal in the tabulation; In case listen to this serial ports is carried out data manipulation, the data of then data of operation being sent into this serial ports send in all sending items in the tabulation, the data in each sending item and this data corresponding operation information are sent to the terminal of each sending item correspondence.Make the terminal of having subscribed to this operation of serial-port can both listen to the data manipulation that this serial ports is carried out.
2) can send the mode of creating the sending item of another serial ports in the tabulation by read data in the method that provides in the embodiment of the invention, realize that the data between the different serial ports are distributed and merged at a serial ports.
3) differentiation by the sending item type is carried out, promptly can guarantee the function for monitoring of static types sending item counterpart terminal, the mode of regime type sending item that again can be by timely deletion inactive terminals reduces junk data and the expendable sending item in the network.
4) before serial ports is write data, increased protocol conversion function, made terminal to control, had the function of code converter the miscellaneous equipment that uses the different agreement type.
5) when carrying out remote data transmission, can realize transparent data transmission channel.As shown in Figure 5, when control appliance and controlled device need carry out remote data transmission, can adopt connection framework shown in Figure 5, read data at the serial ports 1 of serial server 1 sends the sending item that is pre-created the port one of serial server 2 in the tabulation, and the data that configuration receives from port one on serial server 2 write serial ports 2.When control appliance sends data to controlled device, serial server 1 will be sent into the sending item of port one of serial server 2 from the data that serial ports 1 reads, then these data are sent to the port one of serial server 2 from sending item, serial server 2 writes serial ports 2 according to configuration with these data again, just can realize these data are sent to controlled device; The process that is sent to control appliance from controlled device is similar, thereby has realized the transparent data transmission channel between control appliance and the controlled device, and for example, above-mentioned control appliance can be keyboard, and controlled device can be video camera.
The above only is preferred embodiment of the present invention, and is in order to restriction the present invention, within the spirit and principles in the present invention not all, any modification of being made, is equal to replacement, improvement etc., all should be included within the scope of protection of the invention.
Claims (13)
1, a kind of transfer control method of serial data is characterized in that, creates data for each serial ports of serial server and sends tabulation, and serial server is open mode with all serial port setting, and all data manipulations are intercepted after starting; This method comprises:
Data at first serial send the sending item of creating terminal in the tabulation in advance; Perhaps, after serial server received the subscription instruction that comprises the first serial sign that described terminal sends, the data that identify pairing first serial at described first serial sent the sending item of creating described terminal in the tabulation;
In case listen to described first serial is carried out data manipulation, the data of then data of operation being sent into described first serial send in all sending items in the tabulation, the data in each sending item and this data corresponding operation information are sent to the terminal of each sending item correspondence.
2, method according to claim 1 is characterized in that, described data send tabulation and send tabulation for read data, and described subscription instruction is subscribed to instruction for read data; Perhaps,
Described data send tabulation and send tabulation for write data, and described subscription instruction is subscribed to instruction for write data.
3, method according to claim 2, it is characterized in that, in case listen to from described first serial and read data, then will send in all sending items the tabulation, the read data of described first serial will be sent the terminal that the data in each sending item and read operation information send to each sending item correspondence in the tabulation from the read data that the data that described first serial reads are sent into described first serial;
In case listen to described first serial is write data, then will send in all sending items in the tabulation, the write data of described first serial will be sent the terminal that the data in each sending item and write operation information send to each sending item correspondence in the tabulation the write data that the data that described first serial writes are sent into described first serial.
4, method according to claim 2 is characterized in that, this method also comprises: the read data at first serial sends the sending item of creating second serial in the tabulation in advance;
In case listen to from described first serial and read data, after then in all sending items in the described data transmission of the data of operating being sent into described first serial is tabulated, also comprise: the data in the sending item of second serial in the read data transmission tabulation of described first serial are write described second serial.
According to the described method of the arbitrary claim of claim 1 to 4, it is characterized in that 5, the type of described sending item is regime type or static types;
Wherein, the sending item of regime type does not exist after described serial server is restarted, and the sending item of static types still keeps after described serial server is restarted.
6, method according to claim 5, it is characterized in that, this method also comprises: described terminal sends heartbeat message to described serial server at interval with regular time, described serial server does not receive described heartbeat message in the default time interval, then delete the sending item of the regime type of all described terminals.
7, method according to claim 3 is characterized in that, before described first serial was write data, the data that described serial server will write described first serial were converted to the protocol type data that the destination device of these data is supported.
8, a kind of transmission control unit of serial data is characterized in that, this transmission control unit is arranged in the serial server, and this device comprises: list storage unit, main control unit and socket;
Described list storage unit, the data transmission tabulation that is used to store each serial ports;
Described main control unit is used for being open mode with all serial port setting, and all data manipulations being intercepted after described serial server starts; Data at first serial send the sending item of creating terminal in the tabulation in advance, perhaps, after receiving the subscription instruction that comprises the first serial sign that described terminal sends by described socket, the data that identify pairing first serial at described first serial send the sending item of creating described terminal in the tabulation; In case listen to described first serial is carried out data manipulation, the data of then data of operation being sent into described first serial send in all sending items in the tabulation, the data in each sending item and this data corresponding operation information are sent to the terminal of each sending item correspondence by described socket.
9, device according to claim 8 is characterized in that, the data of described list storage unit storage send tabulation and send tabulation for read data;
Described main control unit receives after the read data that comprises the first serial sign that terminal sends subscribes to instruction by described socket, sends the sending item of creating described terminal in the tabulation at the read data of described first serial; In case listen to from described first serial and read data, then will send in all sending items the tabulation, the read data of described first serial be sent the terminal that the data in each sending item and read operation information send to each sending item correspondence in the tabulation by described socket from the read data that the data that described first serial reads are sent into described first serial.
10, device according to claim 8 is characterized in that, the data of described list storage unit storage send tabulation and send tabulation for write data;
Described main control unit receives after the write data that comprises the first serial sign that terminal sends subscribes to instruction by described socket, sends the sending item of creating described terminal in the tabulation in the write data of described first serial; In case listen to described first serial is write data, then will send in all sending items in the tabulation, the write data of described first serial be sent the terminal that the data in each sending item and write operation information send to each sending item correspondence in the tabulation by described socket to the write data that the data that described first serial writes are sent into described first serial.
11, according to Claim 89 or 10 described devices,, it is characterized in that, described main control unit also is used for restarting the sending item that the back keeps all static types of described list storage unit at described serial server, does not keep the sending item of all regime types in the described list storage unit.
12, device according to claim 11 is characterized in that, this device also comprises: overtime detecting unit is used to detect the time that described main control unit the last time of current distance receives the heartbeat message of described terminal;
Described main control unit also is used for deleting the sending item of the regime type of all described terminals in the described list storage unit when the described detected time of overtime detecting unit surpasses default time threshold.
13, according to Claim 89 or 10 described devices,, it is characterized in that, described main control unit also was used for before described first serial is write data, and the data that will write described first serial are converted to the protocol type data that the destination device of these data is supported.
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| CN2008102250398A CN101465839B (en) | 2008-10-24 | 2008-10-24 | Transmission control method and apparatus for serial data |
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| CN2008102250398A CN101465839B (en) | 2008-10-24 | 2008-10-24 | Transmission control method and apparatus for serial data |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101989250A (en) * | 2010-11-03 | 2011-03-23 | 中兴通讯股份有限公司 | Serial communication method and system |
| CN102819513A (en) * | 2012-06-29 | 2012-12-12 | 安科智慧城市技术（中国）有限公司 | Interactive method and interactive device based on serial port communication |
| CN103051716A (en) * | 2012-12-25 | 2013-04-17 | 中标软件有限公司 | Method and system for redirecting network-oriented serial device |
| CN104699649A (en) * | 2015-03-16 | 2015-06-10 | 中煤科工集团上海研究院 | Multi-branch serial bus interface and data exchange method |
| CN104811359A (en) * | 2015-04-10 | 2015-07-29 | 深圳市元征科技股份有限公司 | Serial port communication method and terminal |
| CN105868149A (en) * | 2016-03-24 | 2016-08-17 | 杭州昆海信息技术有限公司 | A serial port information transmission method and device |
| CN109194442A (en) * | 2018-08-08 | 2019-01-11 | 济南浪潮高新科技投资发展有限公司 | A kind of serial port data forwarding device, method and system |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1210882C (en) * | 2001-12-30 | 2005-07-13 | 华为技术有限公司 | Serial port wire with monitoring interface |
| CN1316387C (en) * | 2002-02-20 | 2007-05-16 | 贵州以太科技信息产业有限责任公司 | Serial interface bus communication controller |
| CN101122894A (en) * | 2006-08-13 | 2008-02-13 | 朱金怀 | Asynchronous serial communication control device |
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- 2008-10-24 CN CN2008102250398A patent/CN101465839B/en not_active Expired - Fee Related
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101989250A (en) * | 2010-11-03 | 2011-03-23 | 中兴通讯股份有限公司 | Serial communication method and system |
| CN102819513A (en) * | 2012-06-29 | 2012-12-12 | 安科智慧城市技术（中国）有限公司 | Interactive method and interactive device based on serial port communication |
| CN103051716A (en) * | 2012-12-25 | 2013-04-17 | 中标软件有限公司 | Method and system for redirecting network-oriented serial device |
| CN104699649A (en) * | 2015-03-16 | 2015-06-10 | 中煤科工集团上海研究院 | Multi-branch serial bus interface and data exchange method |
| CN104699649B (en) * | 2015-03-16 | 2018-10-30 | 中煤科工集团上海研究院 | A kind of multiple-limb serial bus interface and method for interchanging data |
| CN104811359A (en) * | 2015-04-10 | 2015-07-29 | 深圳市元征科技股份有限公司 | Serial port communication method and terminal |
| CN104811359B (en) * | 2015-04-10 | 2018-12-07 | 深圳市元征科技股份有限公司 | A kind of serial port communication method and terminal |
| CN105868149A (en) * | 2016-03-24 | 2016-08-17 | 杭州昆海信息技术有限公司 | A serial port information transmission method and device |
| CN109194442A (en) * | 2018-08-08 | 2019-01-11 | 济南浪潮高新科技投资发展有限公司 | A kind of serial port data forwarding device, method and system |
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| CN101465839B (en) | 2012-07-04 |
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