CN101132377B - Device and method for receiving and transmitting serial application - Google Patents
Device and method for receiving and transmitting serial application Download PDFInfo
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- CN101132377B CN101132377B CN2006101125743A CN200610112574A CN101132377B CN 101132377 B CN101132377 B CN 101132377B CN 2006101125743 A CN2006101125743 A CN 2006101125743A CN 200610112574 A CN200610112574 A CN 200610112574A CN 101132377 B CN101132377 B CN 101132377B
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Abstract
This invention discloses a T-R serial application device and a method, in which, said device includes a data transmitting device, a data receiving device characterizing that the sending device includes: a channel application configuring module, a received application management module, a deserializer and a data transmitting module, the receiving device also includes: a channel threshold value configuration module, a sent application management module, a serializer and a data receiving module, in which, the sent application management module enquires the data receiving module and the channel threshold value configuration module and transmits channel numbers and sending application order to the serializer, which sends the application corresponding to the numbers to the deserializer according to the serial application protocol to receive it and sends it to the received application management module to determine if it allows the sending module to send data.
Description
Technical field
The present invention relates to communication information switching technology, particularly relate to the apparatus and method of a kind of reliable receiving and transmitting serial application between the R-T unit in data communication.
Background technology
Along with network application is increasingly extensive, also more and more higher to the transfer of data rate request.In order to improve transmission speed, in system design, data/address bus adopts the one-way transmission method usually, promptly sends data/address bus and uses different buses respectively with the reception data/address bus.Adopt under the situation of one-way transmission, can receive the data that all send in order to guarantee data sink, data sending device need be known the state information of data sink, thereby whether decision allows to send Frame to data sink.The state information method that obtains data sink at present mainly contains two kinds, the one, data sink passes through special-purpose condition line and clock bus, the state information of oneself is passed to data sending device, the advantage of this method has been to use the method for source clock synchronization, information can be transmitted reliably, can support the multi-channel data transmission simultaneously; Another kind method is the state information of coming the Data transmission receiving system by a holding wire, and the advantage of this method is the holding wire transmit mode information of utilizing seldom, has significantly reduced system resource and cost.A kind of method in back can be divided two kinds again, and the one, Ready (being ready to) pattern is represented the state information of data sink with high-low level, this method is very reliable, but shortcoming is only suitable single channel transfer of data; Another kind method is Request (application) pattern, this pattern is to utilize the transmission data clock that each channel status information of data sink is sent to data sending device with serial data mode, the advantage of this method is: the state information that can send a plurality of passages with the individual signals line, because the holding wire that this pattern is used is few, powerful, so more and more be applied in the various data communication.
The data transmission system block diagram that adopts the Request pattern as shown in Figure 1, system mainly is made up of data sending device 102, data sink 101, data/address bus (D[n:0]), clock (Clock) signal and application (Request) signal.The method that sends application at present is that data sink 101 determines that according to the state of each channel memory what applications each passage can send to data sending device 102.Because this method does not have feedback mechanism, can both correctly be received by data sending device 102 so always suppose the application that all data sinks 101 send.If fail correctly to receive to be dropped owing to ectocine makes certain application, system can not find this mistake so, and data sink 101 also just can not be corrected this mistake by resending; After a plurality of wrong generations, data sending device 102 can not send data because there being application, and data sink 101 can think that data sending device 102 has enough applications and do not have data to send; Cause the system data transmission to interrupt thus, show as network and interrupt, the user is caused immeasurable loss.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of receiving and transmitting serial application devices and methods therefor, is used for solving the prior art receiving and transmitting serial application and can not overcomes external environmental interference, causes applying for losing and then causing the problem and the defective of transfer of data interruption.
To achieve these goals, the invention provides a kind of receiving and transmitting serial application device, comprise data sending device, data sink, it is characterized in that described data sending device comprises again:
One passage application configuration module is used to dispose the maximum application number that each passage allows reception;
Receive applications management module, be used for safeguarding the counter group of the current application number of each passage of management according to the channel number of described maximum application number and reception, and determine whether to allow to receive application according to described maximum application number, determine whether to allow to send Frame according to described current application number;
One deserializer is used for receiving application and channel number is sent to described reception applications management module; And
One data transmission blocks is used for determining whether to send Frame according to the Frame sign that the Frame situation and the described reception applications management module of channel queue are returned;
Described data sink comprises again:
One passage threshold value configuration module is used to dispose the minimum idle storage space that each passage allows to send application;
One sends applications management module, is used for determining whether to allow to send application by the fifo queue state and the described minimum idle storage space of inquiring about each passage;
Serializer is used to receive the transmission instruction and the channel number of described transmission applications management module, and connects serial application agreement transmission application; And
One data reception module is used to manage the fifo queue of each passage, receives Frame that described data transmission blocks sends and stores by passage.
Described receiving and transmitting serial application device, wherein, the maximum application number that described each passage allows to receive is disposed by described data sending device; The minimum idle storage space that described each passage allows to send application is disposed by described data sink.
To achieve these goals, the invention provides a kind of method of utilizing described device to realize receiving and transmitting serial application, it is characterized in that, comprising:
Step 2, described serializer receive described channel number and described transmission application order, and the application of described channel number correspondence is sent to deserializer by the serial application agreement;
Step 4, described reception applications management module receives described channel number, and obtains the current application number of described channel number respective channel by query counts device group, obtains maximum application number by inquiry passage application configuration module; Safeguard described counter group according to described current application number, described maximum application number again, and determine whether to allow to receive application and determine whether to allow described data transmission blocks to send data according to described current application number according to described maximum application number.
Described receiving and transmitting serial application method, wherein, described step 2 is specially: described serializer receives described channel number and described transmission application order, sends out the beginning flag of two bits in road, and described channel number is pressed low level transmission earlier and the continuous send mode transmission of each bit application; Described serializer enters idle condition after finishing described application transmission, wait for sending the application order next time.
Described receiving and transmitting serial application method, wherein, in the described step 2, also comprise one by judging whether to allow described serializer to send the step of application by the current idle storage space value of the more described data reception module of described transmission applications management module and the minimized storage space value of described passage threshold value configuration module, if described current idle storage space value is during more than or equal to described minimized storage space value, then allow described serializer to send application, otherwise, do not allow described serializer to send application.
Described receiving and transmitting serial application method wherein, in the described step 3, also comprises by described deserializer by detecting the step that described beginning flag detects the state of described application signal; If the state of described application signal becomes high level by low level, judge further whether described deserializer receives a correct beginning flag, otherwise described deserializer continues to detect the state of described application signal.
Described receiving and transmitting serial application method, wherein, by two clock cycle of the described application signal of described deserializer joint detection, if described application signal all is in high level in described two clock cycle, then described deserializer is received correct beginning flag.
Described receiving and transmitting serial application method, wherein, in the described step 3, also comprise when described deserializer and receive that described channel number is received in the follow-up continued access of correct beginning flag and to the double reception of each bit of described channel number and judge the step that the bit that receives for twice is whether identical, if identical, then this bit is correctly received; Otherwise it is wrong that then described deserializer receives described channel number, is provided with to receive the error flag position.
Described receiving and transmitting serial application method, wherein, in the described step 3, also comprise the step that the channel number that judge to be received according to described reception error flag position by described deserializer is whether correct, if correct, then described deserializer transmits this channel number and gives described reception applications management module; Otherwise described deserializer abandons this channel number.
Described receiving and transmitting serial application method, wherein, in the described step 4, comprise that also one judges whether to allow to increase the step of described current application number, if described current application number then allows described current application number to add 1 less than described maximum application number, otherwise, keep described current application number constant.
Described receiving and transmitting serial application method, wherein, in the described step 4, comprise that also one judges whether to allow described data transmission blocks to send the step of Frame, if described current application number is greater than zero, then described reception applications management module is returned one to described data transmission blocks and is allowed to send the Frame sign, allows to send Frame; Otherwise described reception applications management module is returned one to described data transmission blocks and is not allowed to send the Frame sign, does not allow to send Frame.
Beneficial effect of the present invention is:
Adopt the method for the invention and device, compared with prior art, obtained the technological progress that accidental error of transmission appears in the tolerance system, the electronically jamproof effect of the system that reached has improved system reliability or the like.
Describe the present invention below in conjunction with the drawings and specific embodiments, but not as a limitation of the invention.
Description of drawings
Fig. 1 is existing receiving and transmitting serial application system schematic;
Fig. 2 is a receiving and transmitting serial application device schematic diagram of the present invention;
Fig. 3 is that serial application agreement of the present invention (is supported 16 access diagrams;
Fig. 4 is a receiving and transmitting serial application schematic flow sheet of the present invention.
Embodiment
Be described in further detail below in conjunction with the enforcement of accompanying drawing reliable receiving and transmitting serial application technical scheme.
See also shown in Figure 2ly, be receiving and transmitting serial application device schematic diagram of the present invention.This application device comprises: data sending device 102, data sink 101; The hardware module part of data sink 101 comprises again: passage threshold value configuration module 201, transmission applications management module 203, serializer 204 and data reception module 207; The hardware module part of data sending device 102 comprises again: passage application configuration module 202, deserializer 205, reception applications management module 206 and data transmission blocks 208.
Passage threshold value configuration module 201 is used to dispose/store the minimized storage space value K that each passage allows to send to data sending device 102 application
n(wherein K is the minimized storage space value, and unit is byte, and n is a channel number, and the n span is 0 to N-1, and N is the largest passages number that system supports), K
nBy system configuration.The value of K is relevant with the maximum data frame length L (byte gets in unit) that passage maximum application number C and system can send, and relational expression is as follows:
K
n＝(C
n+1)*L (1)
Passage application configuration module 202, being used to dispose/store each passage can count C from the maximum application that data sink 101 receives
n(wherein n is a channel number, and the n span is 0 to N-1, and N is the largest passages number that system supports), C
nBy system configuration.
Send applications management module 203, FIFO (the First-In First-Out that is used for data query receiver module 207 each passage, first in first out) permission of each passage sends the threshold value of applying in quene state and the passage threshold value configuration module 201, and whether decision allows to send application.Send applications management module 203 and safeguard a channel number index value, index value is channel number n, and according to n value data query receiver module 207 and passage threshold value configuration module 201.Send the current idle storage space value k that applications management module 203 comparing data receiver modules 207 return
nThe minimized storage space value K that returns with passage threshold value configuration module 201
n, according to comparative result decision subsequent operation.If k
nBe greater than or equal to K
n, allow to send application, send applications management module 203 so and send startup transmission application order, and the n value is passed to serializer 204 to serializer 204, continue to inquire about next channel status then; Otherwise directly inquire about next channel status.Inquire about next passage and add 1 realization by the n value, if n equals N-1, then n zero clearing.
Serializer 204 is used to receive the transmission instruction that sends applications management module 203, will apply for sending (as shown in Figure 3) by the serial application agreement.After serializer 204 receives and sends applications management module 203 and pass the transmission application order of coming, at first send the beginning flag of two bits (bit) position, then channel number n is sent by low level transmission earlier and the continuous principle serial that sends twice of each bit, after finishing a transmit operation, serializer 204 enters idle condition, waits for sending order next time.
Deserializer 205 is used to detect beginning flag, after detecting an application transmission beginning, whole application is received, and obtains channel number and pass to receive applications management module 206 from the Request holding wire.After deserializer 205 only detects the Request holding wire and continuously two high level occur, just begin each bit of receive path number, each bit requires twice of reception continuously.If the level that certain bit receives for twice is inequality, then be provided with and receive the error flag position, after whole channel number finishes receiving, abandon this channel number; Receive if each bit is all accurate, then this channel number n is extracted and pass to reception applications management module 206.
Receive applications management module 206, be used to safeguard a counter group c who manages the current application number of each passage, receive deserializer 205 and pass application number, the request of increase application number of coming, inquiry passage application configuration module 202 determines whether to allow to receive an application; Accept the query requests of data transmission blocks 208 simultaneously.After receiving applications management module 206 and receiving the channel number n that deserializer 205 sends over, c is counted in the current application that can directly obtain this passage by the current application counter group c of inquiry self maintained
n, be that index removes to inquire about passage application configuration module 202 with n simultaneously, C is counted in the maximum application that obtains system configuration
nWith the C that returns
nAnd c
nCompare, if c
nLess than C
n, c then
nAdd 1, otherwise c
nRemain unchanged.After reception applications management module 206 receives the query requests of data transmission blocks 208, the current application number of inquiry respective channel number is if the application number greater than zero, then returns to data transmission blocks 208 and allows to send the Frame sign, and current application number subtracted 1, finish inquiry; Otherwise return to data transmission blocks 208 and not allow to send the Frame sign, directly finish inquiry then.
Data reception module 207 is used to manage the fifo queue of each passage, from data/address bus D[n:0] receive the Frame that data transmission blocks 208 sends, and Frame press passage store; And from data frame head acquisition channel number, the payload with Frame deposits in the corresponding fifo queue then, manages the fifo queue of each passage simultaneously.Data reception module 207 responses send the query requests of applications management module 203, return the current queue idle storage space k of the passage of inquiring about
nGive and send applications management module 203.
Data transmission blocks 208 is used to send the Frame of each passage, and inquiry receives applications management module 206, if allow to send data and have data etc. to be sent, then sends a Frame.The Frame transmit queue of data transmission blocks 208 each passage of management, when in data transmission blocks 208 has the formation of certain passage, having Frame etc. to be sent, at first inquiry receives applications management module 206 these passages and whether allows to send Frame, if what return is to allow to send sign, then the individual Frame with this passage sends, and whether continue the next passage of inquiry then has data to send; What return else if is not allow to send sign, and whether then directly continue the next passage of inquiry has data to send.
See also shown in Figure 3ly, be serial application agreement of the present invention (supporting 16 passages) schematic diagram.As follows for the serial application protocol specification that the present invention uses:
The serial application protocol system is made up of clock signal C lock and two signals of application signal Request; The Clock signal is driven by data sending device 102, and data sink 101 receives; The Request signal is driven by data sink 101, and lock is synchronous through clock signal C, sends to data sending device 102, and the Request signal must drive the free time and be low level.Serial application protocol data structure is made up of start bit/sign and channel number, and each bit occupies two clock cycle.The port number decision that the length of channel number is supported by system, as shown in Figure 3, the channel number of 4 bit lengths can make 16 passages of the maximum support of system.
See also shown in Figure 4ly, be receiving and transmitting serial application schematic flow sheet of the present invention.Treatment step for reliable receiving and transmitting serial application of the present invention is as follows:
Step 2, the threshold value of inquiry channel arrangement, sending applications management piece 203 is that index removes to inquire about passage threshold value configuration module 201 with channel number n, and the permission that passage threshold value configuration module 201 returns n institute respective channel sends the minimized storage space value K that applies for to data sending device 102
n
Step 4, send serial application, after serializer 204 receives and sends the transmission application order and channel number n that applications management module 203 passes over, start and send the application handling procedure, at first send the beginning flag of two bits (bit) positions, then channel number n sent earlier by low level and the principle serial of the double transmission of each bit sends, finish a transmit operation after, serializer 204 enters idle condition, waits for sending order next time.
Step 5 is inquired about next passage, after finishing a serial application transmission, sends applications management module 203 and revises channel number n values, continues next passage of inquiry, execution in step 1.
Step 6 detects beginning flag, and deserializer 205 constantly detects the states of Request signals, after detecting the Request signal and becoming high level by low level, and execution in step 7, otherwise continue to detect the state of Request signal.
Step 7, judge whether to receive a correct beginning flag, deserializer two clock cycle of 205 continuous detecting Request signals, if in two clock cycle, all be to detect high level, think a correct beginning flag so, execution in step 8, otherwise think the beginning flag of a mistake, execution in step 6.
Step 8, receive path n, deserializer 205 continue receive path number after detecting a correct beginning flag.Each bit all needs to receive twice continuously, and judge whether the value that receives for twice is the same, when to have only the value that receives for twice be the same, think that just this bit is correctly sent and receives, if a bit receives mistake arbitrarily, think that then the channel number n reception of this application is wrong, and reception error flag position is set.After whole channel number n finishes receiving, execution in step 9, otherwise continue to receive the subsequent bits position.
Step 9 judges whether the channel number that receives is correct, and deserializer 205 judges according to the reception error flag position that step 8 is provided with whether the current channel number n that receives is correct.If correct, then channel number n is passed to and receive applications management module 206, execution in step 10, otherwise, abandon channel number n, execution in step 13.
Step 10, the maximum application number of inquiry channel arrangement, after receiving applications management module 206 and receiving the channel number n that deserializer 205 sends over, be that index removes to inquire about passage application configuration module 202 with channel number n, passage application configuration module 202 is returned as the C of this channel arrangement
n
Step 12, the application number of increase passage receives applications management module 206 with the c that oneself safeguards
nValue increases by 1.
Step 13 finishes a complete serial application and receives handling process, and pending next application such as continuation receives handling process, execution in step 6.
The method and the device thereof of a kind of reliable receiving and transmitting serial application that the present invention proposes have solved that receiving and transmitting serial application can not overcome external environmental interference in the prior art, cause application to be lost, and then the problem and the defective that cause transfer of data to be interrupted.Compare with traditional method, the inventive method has higher reliability, and concrete manifestation is as follows:
1), at first the present invention has adopted the method for continuous transmission application.This method is just as the Ready pattern, as long as this passage energy receiving data frames, just constantly pass on the information that can continue receiving data frames to data sending device, so, even in the process that sends application, certain or some applications have been lost, and lose so long as not all applications, can both guarantee that data correctly transmit.This method just looks like to make that each passage all is operated in the Ready pattern in the system.And conventional method is under the prerequisite that each application of supposition can both correctly receive, data sink sends application according to the application number of the maximum transmission of system's setting, after the application number of certain passage transmission reaches maximum, just can not continue to send, have only receive a Frame by the time after, could send an application to data sending device, promptly application and Frame must be one to one; Therefore this method can not solve after each application is lost, and system reissues an application automatically; When the application number of losing when certain passage reached maximum, data sending device can be because the not application of this passage and abandon all messages, and data sink thinks there that also data sending device does not have data to send.
2), the inventive method guarantees that by the minimum free space that individual permission sends application each Frame in the passage can both be received, and guarantees that overflowing can not appear in fifo queue.When the parameter value of minimum free space is set, stay the space (K of a Frame more
n=(C
n+ 1) * L), this is because system may appear at when sending certain passage application, just in time this passage is receiving a Frame, because the memory space that this Frame occupies does not embody when sending the applications management module inquiry, therefore need to stay the space of a Frame to prevent that memory space from overflowing more.
3), the present invention also has a flexible part: the maximum application number of each passage that can receive in can the configuration data dispensing device, this just provides means more flexibly for system design.And the maximum application number of traditional all passages of method all is a fixed value, can not control by passage.
4), each bit sends and receives twice, can find some errors of transmission at receiving terminal.
Certainly; the present invention also can have other various embodiments; under the situation that does not deviate from spirit of the present invention and essence thereof; those of ordinary skill in the art work as can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection range of the appended claim of the present invention.
Claims (11)
1. a receiving and transmitting serial application device comprises data sending device, data sink, it is characterized in that, described data sending device comprises again:
One passage application configuration module is used to dispose the maximum application number that each passage allows reception;
One receives applications management module, be used for safeguarding the counter group of the current application number of each passage of management according to the channel number of described maximum application number and reception, and determine whether to allow to receive application according to described maximum application number, determine whether to allow to send Frame according to described current application number;
One deserializer is used for receiving application and channel number is sent to described reception applications management module; And
One data transmission blocks is used for determining whether to send Frame according to the Frame sign that the Frame situation and the described reception applications management module of channel queue are returned;
Described data sink comprises again:
One passage threshold value configuration module is used to dispose the minimum idle storage space that each passage allows to send application;
One sends applications management module, is used for determining whether to allow to send application by the fifo queue state and the described minimum idle storage space of inquiring about each passage;
One serializer is used to receive the transmission instruction and the channel number of described transmission applications management module, and presses serial application agreement transmission application; And
One data reception module is used to manage the fifo queue of each passage, receives Frame that described data transmission blocks sends and stores by passage.
2. receiving and transmitting serial application device according to claim 1 is characterized in that, the maximum application number that described each passage allows to receive is disposed by described data sending device; The minimum idle storage space that described each passage allows to send application is disposed by described data sink.
3.
OnePlant and utilize claim 1 or 2 described devices to realize the method for receiving and transmitting serial applications, it is characterized in that, comprising:
Step 1 sends applications management module data query receiver module and passage threshold value configuration module, and acquisition allows to send the channel number of application, and described channel number and transmission application order are sent to serializer;
Step 2, described serializer receive described channel number and described transmission application order, and the application of described channel number correspondence is sent to deserializer by the serial application agreement;
Step 3, described deserializer receive described channel number and are sent to the reception applications management module; And
Step 4, described reception applications management module receives described channel number, and obtains the current application number of described channel number respective channel by query counts device group, obtains maximum application number by inquiry passage application configuration module; Safeguard described counter group according to described current application number, described maximum application number again, and determine whether to allow to receive application and determine whether to allow described data transmission blocks to send data according to described current application number according to described maximum application number.
4. receiving and transmitting serial application method according to claim 3, it is characterized in that, described step 2 is specially: described serializer receives described channel number and described transmission application order, send the beginning flag of two bits, and described channel number is sent application by low level transmission earlier and the continuous mode that sends twice of each bit; Described serializer enters idle condition after finishing described application transmission, wait for sending the application order next time.
5. according to claim 3 or 4 described receiving and transmitting serial application methods, it is characterized in that, in the described step 2, also comprise one by judging whether to allow described serializer to send the step of application by the current idle storage space value of the more described data reception module of described transmission applications management module and the minimized storage space value of described passage threshold value configuration module, if described current idle storage space value is during more than or equal to described minimized storage space value, then allow described serializer to send application, otherwise, do not allow described serializer to send application.
6. receiving and transmitting serial application method according to claim 5 is characterized in that, in the described step 3, also comprises by described deserializer by detecting the step that beginning flag detects the state of described application signal; If the state of described application signal becomes high level by low level, judge further whether described deserializer receives a correct beginning flag, otherwise described deserializer continues to detect the state of described application signal.
7. receiving and transmitting serial application method according to claim 6, it is characterized in that, by two clock cycle of the described application signal of described deserializer joint detection, if described application signal all is in high level in described two clock cycle, then described deserializer is received correct beginning flag.
8. receiving and transmitting serial application method according to claim 7, it is characterized in that, in the described step 3, comprise that also receiving the follow-up continued access of correct beginning flag when described deserializer receives described channel number, and to the double reception of each bit of described channel number and judge the step that the bit that receives for twice is whether identical, if identical, then this bit is correctly received; Otherwise it is wrong that then described deserializer receives described channel number, is provided with to receive the error flag position.
9. receiving and transmitting serial application method according to claim 8, it is characterized in that, in the described step 3, also comprise the step that the channel number that judge to be received according to described reception error flag position by described deserializer is whether correct, if correct, then described deserializer transmits this channel number and gives described reception applications management module; Otherwise described deserializer abandons this channel number.
10. according to claim 3,4 or 9 described receiving and transmitting serial application methods, it is characterized in that, in the described step 4, comprise that also one judges whether to allow to increase the step of described current application number, if described current application number is less than described maximum application number, then allow described current application number to add 1, otherwise, keep described current application number constant.
11. according to claim 3,4 or 9 described receiving and transmitting serial application methods, it is characterized in that, in the described step 4, comprise that also one judges whether to allow described data transmission blocks to send the step of Frame, if described current application number is greater than zero, then described reception applications management module is returned one to described data transmission blocks and is allowed to send the Frame sign, allows to send Frame; Otherwise described reception applications management module is returned one to described data transmission blocks and is not allowed to send the Frame sign, does not allow to send Frame.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006101125743A CN101132377B (en) | 2006-08-23 | 2006-08-23 | Device and method for receiving and transmitting serial application |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006101125743A CN101132377B (en) | 2006-08-23 | 2006-08-23 | Device and method for receiving and transmitting serial application |
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| Publication Number | Publication Date |
|---|---|
| CN101132377A CN101132377A (en) | 2008-02-27 |
| CN101132377B true CN101132377B (en) | 2010-06-23 |
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|---|---|---|---|
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| JP6351672B2 (en) * | 2016-09-14 | 2018-07-04 | 三菱電機株式会社 | Data transmitting / receiving apparatus and data transmitting / receiving method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0213768A2 (en) * | 1985-08-12 | 1987-03-11 | International Control Automation Finance S.A. | On-line serial communication interfaces |
| CN1236134A (en) * | 1998-04-15 | 1999-11-24 | 精工爱普生株式会社 | Peripher device and control method thereof |
-
2006
- 2006-08-23 CN CN2006101125743A patent/CN101132377B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0213768A2 (en) * | 1985-08-12 | 1987-03-11 | International Control Automation Finance S.A. | On-line serial communication interfaces |
| CN1236134A (en) * | 1998-04-15 | 1999-11-24 | 精工爱普生株式会社 | Peripher device and control method thereof |
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