CN102904564B - For method and the relevant apparatus of the drive current of adjustment transmission interface - Google Patents
For method and the relevant apparatus of the drive current of adjustment transmission interface Download PDFInfo
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- CN102904564B CN102904564B CN201110217245.6A CN201110217245A CN102904564B CN 102904564 B CN102904564 B CN 102904564B CN 201110217245 A CN201110217245 A CN 201110217245A CN 102904564 B CN102904564 B CN 102904564B
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Abstract
The invention discloses the method for the drive current of adjustment transmission interface and relevant apparatus.Embodiments of the invention provide a kind of method of the drive current in order to adjustment data transmission interface.The method comprises: utilize the drive current with present current value constantly to transmit test data to receiving end from data transmission interface; The number of times that this test data accumulative is transmitted, to produce transmission count results; Judge to transfer in the process of receiving end whether transmission error occurs in this test data, and the number of times that this transmission error accumulative occurs, to produce transmission error count results; And when transmitting count results and reaching predetermined value, determine the present current value of how this drive current of adjustment according to this transmission error count results.
Description
Technical field
The present invention relates to data transmission, particularly, relate to a kind of data transmission method and relevant apparatus thereof of adjustment drive current.
Background technology
In general, data transmission interface standard can formulate related specifications for the physical layer characteristic of signal (as: electric current, voltage and frequency etc.), and therefore, the hardware manufacturing chamber of commerce carrys out deisgn product according to the specification in data transmission interface standard.Reliability and stability when transmitting in order to ensure data, therefore the intensity (e.g., higher current value) of signal improves in the hardware manufacturing chamber of commerce, and then reduces the generation of transmission error.In addition, in data transmission specification, require that the current value of the signal of transmission ends must be greater than a reference value (minimum value of norm-setting, each specification is not identical), to guarantee the accuracy of data transmission in certain distance.
But, for the part functional module (such as: bluetooth transceiver module, wireless transport module, digital television module etc.) in some portable electron device (as: notebook computer), larger signal intensity can cause unnecessary power loss, or, when Signal transmissions distance in fact much smaller than during norm-setting when, signal attenuation is also not obvious and also not easily cause transmission error, therefore, the signal intensity meeting specification also can cause unnecessary power loss.Therefore, how enough design flexibilitys be provided and reduce the apparatus and method of power consumption, still having the part that haves much room for improvement.
Summary of the invention
Given this, the invention provides the mechanism that a kind of foundation data for peripheral device transmission accuracy carrys out the drive current of the data transmission interface of this peripheral device of adjustment.In order to optimal driving current value can be determined, in an embodiment of the present invention, utilize test data to carry out test transmission, and pass through the transmission accuracy of observation test data, and then determine whether drive current still has the space downgraded, or the drive current after downgrading has been not enough to guarantee data transmission can keep certain correctness, thus increase driving current value and improve transmission accuracy to improve the intensity of signal transmission.
Embodiments of the invention are to provide a kind of method of the drive current for adjustment data transmission interface.The method comprises: utilize the drive current with present current value constantly to transmit test data to receiving end from this data transmission interface; The number of times that this test data accumulative is transmitted, to produce transmission count results; Judge whether to transfer in the process of this receiving end in this test data transmission error occurs, and the number of times that this transmission error accumulative occurs, to produce transmission error count results; And when this transmission count results reaches predetermined value, decide the present current value of how this drive current of adjustment according to this transmission error count results.
The present invention obtains another embodiment and provides a kind of drive unit.This drive unit comprises: driving circuit, transmission counting unit, control module and transmission error counting unit.This driving circuit is for providing the drive current with present current value, constantly to transmit test data to receiving end from data transmission interface.This transmission counting unit is coupled to this driving circuit, and for the number of times that this test data accumulative is transmitted, to produce transmission count results.This control module is coupled to this transmission counting unit, and in order to judge whether to transfer in the process of this receiving end in this test data transmission error occurs.This transmission error counting unit is coupled to this control module, and in order to carry out the number of times that this transmission error accumulative occurs according to the judgement of this control module, to produce transmission error count results.When this transmission count results reaches predetermined value, this control module decides the present current value of how this drive current of adjustment according to this transmission error count results.
Accompanying drawing explanation
Fig. 1 is the process flow diagram of the embodiment of the inventive method.
Fig. 2 is the decision flow chart of the step terminating drive current adjustment operation in the inventive method.
Fig. 3 is the application schematic diagram of drive unit of the present invention.
Primary clustering symbol description
110 ~ 140,210 ~ 260 steps
310 electronic installations
320,342 core cells
330,341 data transmission interfaces
332 receiving circuits
336 driving circuits
338 processing units
3361,3363 counting units
3362 control modules
Embodiment
Below will clearly demonstrate technical characteristic of the present invention with embodiment, these embodiments are only use as an example.
Please refer to Fig. 1, it is the process flow diagram drawn according to the embodiment of the inventive method.
Step 110: utilize the drive current with present current value constantly to transmit test data to receiving end from data transmission interface;
Step 120: the number of times that this test data accumulative is transmitted, to produce transmission count results;
Step 130: judge to transfer in the process of this receiving end whether transmission error occurs in this test data, and the number of times that this transmission error accumulative occurs, to produce transmission error count results; And
Step 140: when this transmission count results reaches predetermined value, decides the present current value of how this drive current of adjustment according to this transmission error count results.
First, in step 110, drive current first by having present current value carrys out transmitting test data, and (it is any given data, for test), and constantly transmit this test data (to please note to this receiving end, the data content of the test data of each transmission might not be identical, as long as given data), and then recorded frequency and the frequency of transmission error by follow-up step, to learn whether the present current value of this drive current is enough to the correctness guaranteeing that data are transmitted.Therefore, in the step 120, the number of times that this test data is transmitted can be added up, to produce transmission count results.In other words, in the present embodiment, when this test data is sent to this receiving end by this data transmission interface, just can produces and once count, by the successively counting to this test data, transmission count results can be obtained.Then, in step 130, judge to transfer in the process of this receiving end whether transmission error occurs in this test data, and the number of times that this transmission error accumulative occurs, to produce transmission error count results, wherein in order to judge whether the foundation that transmission error occurs is whether this receiving end sends repeat request.Finally, in step 140, if when this transmission count results reaches predetermined value, the present current value of how this drive current of adjustment can be decided in this embodiment according to this transmission error count results.
In an embodiment of the present invention, how the step of this drive current of adjustment can comprise again: this transmission error count results and threshold value are compared; If this transmission error count results is less than this threshold value, then this present current value is downgraded; And if when this transmission error count results is more than or equal to this threshold value, then this present current value is increased.In other words, when method of the present invention obtain primary data transmission correctness by drive current downgrade affect time, then can increase the present current value of this drive current.And when the correctness of data transmission is still in safe range, then can continue the present current value downgrading this drive current, to find the minimum current value being enough to correctly transmit data.In addition, once this present current value is by after adjustment, this transmission count results and this transmission error count results can be reset, and re-execute the flow process of the drive current of this data transmission interface of adjustment, to observe the correctness whether present current value after adjustment is enough to maintain data transmission.In an embodiment of the present invention, the determination of this threshold value decides by the specification of this data transmission interface for transmission error tolerance limit.Particularly, if required in the specification of this data transmission interface: within a period of time, when transmission error number of times exceedes particular value, forced interruption is online.Therefore, by selecting the numerical value being less than this particular value as threshold value, can avoid in the process of adjustment drive current, at present current value too close to when correctly can transmit the minimum current value of data, because data transmission error rate raises, the online forced interruption caused.
In addition, in an embodiment of the present invention, cause attention interruption for avoiding to cause transmission error owing to being transmitted across continuously many test datas, therefore test data can be assigned in the transmitting procedure of normal data, for example, when normal data and test data are all packets, in every 5 normal data packet, insert a test packet, to avoid attention interruption, it should be noted, above are only an embodiment, scope of the present invention is not limited thereto, and the present invention is not limited the configuration relation between normal data packet and test packet.In fact, the configuration of normal data, can't affect the observation of test transmission, because method of the present invention observes the transmission error that test data occurs.And the transmission of these normal data, be utilize this drive current of the present current value after having adjustment to transmit.Thus, can avoid using without being confirmed whether that the drive current of palpus adjustment is to transmit normal data, in other words, judges whether in the present invention that the flow process of adjustment drive current can not affect the transmission correctness of normal data.
Moreover in step 110, receiving end sends solicited message to data transmission interface, data transmission interface receives solicited message and transmits this test data to receiving end in response to this solicited message.In other words, the transmission of this test data carries out based on this solicited message, therefore, in step 130, there occurs transmission error when this test data is sent in the process of this receiving end, and cause the operation that this receiving end sends a repeat requests, is also carry out based on this solicited message.That is, after data transmission interface transmits this test data to this receiving end, receive again this solicited message (being a repeat requests) immediately, then judge to transfer in the process of receiving end in this test data to there occurs transmission error.In other words, method of the present invention is by judging whether to receive continuously the solicited message that sends for this test data for twice to detect the generation of transmission error.
In an embodiment of the present invention, in order to determine drive current size, therefore, can meet under specified conditions, terminate the adjustment of this present current value, and determine the final current value of drive current, and the deciding means of this final current value is by the initial setting depending on this present current value.For example, when this present current value is set to the maximal value meeting this data transmission interface defined when initial, namely, this present current value is downgraded gradually in adjustment operation afterwards, in this case, once in certain drive current adjustment operation, the number of times (when transmission error number of times exceedes particular value) occurred according to this transmission error and judge that these present current value needs are increased, then represent this present current value too low and be not suitable for being downgraded again, and using after increasing present current value as drive current final current value and stop drive current adjustment operation, after this, this data transmission interface can utilize this final current value stably to carry out the transmission of normal data.Pass on concept of the present invention for knowing, the flow process about foregoing description is summarized in step 210 in Fig. 2 to step 260.Refer to Fig. 2, in a step 220, this operating process can judge whether present current value by adjustment, if so, then can enter step 230 because too frequent (transmission error number of times exceedes particular value) occurs transmission error result; If not, then continue to rest on step 220, wait for that the adjustment of this present current value occurs.In step 230, after the adjustment of this present current value occurs, can judge that whether this adjustment is for downgrading, if downgrade, then return step 220, if not downgrade, then entering step 240, judging that whether the adjustment of this present current value is for increasing further, if not, then return step 220, if so, then enter step 250, utilize the adjustment result of this present current value, as final current value, terminate the adjustment operation of this present current value.For example, if this present current value be initially set 50mA, and present current value is downgraded 30mA, then flow process can go through step 220 and step 230, is then back to the generation that step 220 waits for adjustment next time.If after upper once adjustment occurs, this present current value is increased to 35mA, then can terminate adjustment operation (flow process as described in step 110 to step 140) of present current value, and the present current value of the 35mA utilizing the adjustment of previous institute to obtain is as the final current value of this drive current, in other words, normal data (packet) afterwards all utilizes the drive current of 35mA to transmit.Similarly, if when this present current value is set to the minimum value of the specification meeting this data transmission interface when initial, then can to decide this final current value in contrast to the mode of aforesaid operations, successively check that whether the adjustment operation of this present current value is for downgrading, and once this present current value is downgraded, then terminate the adjustment of this present current value.Please note, if this present current value is set to a too low numerical value when initial, then may cause the problem of attention interruption in practice, therefore, initial current value (such as, can the specification of reference data transmission interface or experimental data determine for initial current value setting) must suitably be set, thus, the object finding and be enough to the minimum current value correctly transmitting data can be reached equally, and the change in this design, also belong to category of the present invention.
Moreover, when method of the present invention realizes at USB (universal serial bus) (UniversalSerialBus, USB) time, then this solicited message can utilize the input token data bag (INtokenpacket) defined for USB (universal serial bus) to implement, and this receiving end can be main control end (USBhost), this main control end can utilize this input token data bag to carry out the carrying out of leading the inventive method, namely, when this main control end sends this input token data bag, the inventive method just can transmit test data by this data transmission interface.
Based on aforesaid method, another embodiment of the present invention there is provided the drive unit of the drive current for control data transmission interface.Explanation below about drive unit of the present invention will utilize the electronic installation comprising data transmission interface and drive unit, and the master control set that this electronic installation connects illustrates.As shown in Figure 3, the approach that data transmission interface 330 transmits in order to provide electronic installation 310 data, can make electronic installation 310 be connected with master control set 340 and carry out data transmission.Wherein, electronic installation 310 and master control set 340 according to identical data transmission interface specification to carry out data transmission.Electronic installation 310 can be bluetooth transceiver module or wireless transport module.If electronic installation 310 and master control set 340 carry out data transmission according to USB (universal serial bus) (UniversalSerialBus, USB) specification, then master control set 340 can be USB line concentrator (USBhub).
As shown in Figure 3, electronic installation 310 includes core cell 320 and data transmission interface 330.Core cell 320 is responsible for the function performing electronic installation 310, and it may include CPU (central processing unit) and internal memory, or also comprises other functional module, such as Bluetooth Receiver.Data transmission interface 330 comprises receiving circuit 332, driving circuit 334, physical layer circuit 336 and processing unit 338 (in an embodiment, it may be serial interface engine (SerialInterfaceEngine, SIE)).Physical layer circuit 336 comprises transmission error counting unit 3361, control module 3362 and transmission counting unit 3363, and physical layer circuit 336 is the accuracy of observing test transmission of the present invention, and carry out the current value of the drive current that adjustment driving circuit 334 provides according to preceding method.In the present embodiment, drive unit of the present invention is made up of driving circuit 334, transmission error counting unit 3361, control module 3362.In drive current adjustment mechanism of the present invention, driving circuit 334 provides the drive current with present current value constantly to transmit test data from data transmission interface 330 to receiving end (that is, the master control set 340 in the present embodiment).Transmission counting unit 3363 is the number of times transmitted in order to this test data accumulative, to produce transmission count results.Control module 3362 is in order to judge transferring in the process of receiving end whether transmission error occurs in test data.Transmission error counting unit 3361 is the frequencies in order to carry out accumulative transmission error according to the judgement of control module 3362, to produce transmission error count results, wherein, when this transmission count results reaches predetermined value, the present current value of the drive current that the driving circuit 334 that control module 3362 just decides how adjustment drive unit of the present invention according to this transmission error count results provides.Wherein, before the mode of drive current adjustment and principle of operation are specified in, in order to instructions for purpose of brevity, just seldom repeat at this.Processing unit 338 is control data transmission interfaces 330, with the data that core cell 320 will be transmitted or be received by physical layer circuit 336, is received according to the direction of data transmission or is transmitted by receiving circuit 332 or driving circuit 334.
In addition; master control set 340 is by its data transmission interface 341 transmission request information; to start drive current adjustment of the present invention mechanism; and when master control set 340 receives by its data transmission interface 341 test data transmitted from data transmission interface 330; core cell 342 can be utilized whether correct to the test data judging it and receive; if when error being detected; then again can send this solicited message to electronic installation 310 by data transmission interface 341, to require that it retransmits test data (again sending solicited message).Thus, the control module 3362 of drive unit of the present invention just can judge the generation of transmission error, and notification transmission error count unit 3361 carries out counting to upgrade above-mentioned transmission error count results.
When master control set 340 cannot correctly be received from certain proportion the test data that data transmission interface 330 transmits, the present current value of the drive current that the driving circuit 334 namely representing drive unit of the present invention provides is not enough to the Stability and dependability guaranteeing that data are transmitted, therefore will the control module 3362 of drive unit be utilized to the present current value of the drive current adjusting driving circuit 334 and provide, control module 3362 then carries out the adjustment of drive current according to preceding method.Once control module 3362 pairs of present current value carry out adjustment, transmission counting unit 3363 will be reset with the count results of transmission error counting unit 3361, and whether the present current value after making physical layer circuit 336 can again observe adjustment can guarantee the correctness (the need of adjustment again) that data are transmitted.Because data transmission interface of the present invention is according to designed by preceding method, therefore, the details of operation of each assembly changes all identical with the description of previous corresponding step with enforcement, and those skilled in the art should understand easily after the paragraph reading the above-mentioned method for adjustment drive current, therefore for asking instructions concise and to the point, will seldom repeat at this.
Claims (16)
1., in order to a method for the drive current of adjustment data transmission interface, comprise:
Utilize the drive current with present current value constantly to transmit test data to receiving end from described data transmission interface;
The number of times that accumulative described test data is transmitted, to produce transmission count results;
Judge to transfer in the process of described receiving end whether transmission error occurs in described test data, and the number of times that accumulative described transmission error occurs, to produce transmission error count results; And
When described transmission count results reaches predetermined value, carry out the described present current value of drive current described in adjustment according to described transmission error count results,
Wherein determine that the step of the described present current value of drive current described in how adjustment comprises:
Described transmission error count results and threshold value are compared;
If when described transmission error count results is less than described threshold value, then described present current value is downgraded; And
If when described transmission error count results is more than or equal to described threshold value, then described present current value is increased.
2. method according to claim 1, also comprises;
Utilize this drive current of the described present current value after there is adjustment, transmit multiple non-test data.
3. method according to claim 2, wherein, test data described in each and non-test data described in each are all packet.
4. method according to claim 1, wherein utilizes the described drive current with described present current value to comprise to transmit described test data to the step of described receiving end from described data transmission interface:
Transmit described test data each time in the operation of described receiving end, the solicited message sent according to described receiving end, thus transmit described test data to described receiving end from described data transmission interface.
5. method according to claim 4, wherein judges whether that transferring in described test data the step that described transmission error occurs in the process of described receiving end comprises:
The described request information sent according to described receiving end in described test data and receive described request information immediately after transferring to described receiving end, then judge to transfer in the process of described receiving end in described test data described transmission error occurs.
6. method according to claim 1, it also comprises:
When the described present current value of described drive current is downgraded, reset described transmission count results and described transmission error count results, and repeat the flow process of the described drive current of data transmission interface described in adjustment;
Wherein the step that described present current value increases also is comprised:
Terminate the flow process of the described drive current of data transmission interface described in adjustment.
7. method according to claim 1, it also comprises:
When the described present current value of described drive current is increased, reset described transmission count results and described transmission error count results, and repeat the flow process of the described drive current of data transmission interface described in adjustment;
Wherein the step that described present current value downgrades also is comprised:
Terminate the flow process of the described drive current of data transmission interface described in adjustment.
8. method according to claim 1, wherein said data transmission interface meets USB (universal serial bus) (UniversalSerialBus, USB) specification.
9. a drive unit, comprises:
Driving circuit, in order to provide the drive current with present current value constantly to transmit test data to receiving end from data transmission interface;
Control module, in order to judge transferring in the process of described receiving end whether transmission error occurs in described test data;
Transmission error counting unit, is coupled to described control module, in order to carry out the number of times that accumulative described transmission error occurs according to the judgement of described control module, to produce transmission error count results;
Wherein when corresponding to the transmission count results of described test data the number of transmissions and reaching predetermined value, described control module determines the described present current value of drive current described in how adjustment according to described transmission error count results,
Described transmission error count results and threshold value compare by wherein said control module; If described transmission error count results is less than described threshold value, then described present current value downgrades by described control module; And if described transmission error count results is more than or equal to described threshold value, then described present current value increases by described control module.
10. drive unit according to claim 9, wherein said driving circuit also utilizes the described drive current of the described present current value with adjustment to transmit multiple non-test data.
11. drive units according to claim 10, wherein said driving circuit transmit each described in test data and non-test data described in each be all packet.
12. drive units according to claim 9, wherein said test data is the solicited message sent according to described receiving end, to be sent to described receiving end by described driving circuit and then from described drive unit.
13. drive units according to claim 12, the described request information wherein sent according to described receiving end in described test data and receive described request information immediately after transferring to described receiving end, then described control module judges that described test data transfers in the process of described receiving end described transmission error occurs.
14. drive units according to claim 9, wherein when described control module downgrades the described present current value of described drive current, described control module resets described transmission count results and described transmission error count results, and repeats the adjustment of described drive current; And when described control module increases the described present current value of described drive current, described control module terminates the adjustment of described drive current.
15. drive units according to claim 9, wherein when described control module increases the described present current value of described drive current, described control module resets described transmission count results and described transmission error count results, and repeats the adjustment of described drive current; And when described control module downgrades the described present current value of described drive current, described control module terminates the adjustment of described drive current.
16. drive units according to claim 9, wherein said data transmission interface accords with USB (universal serial bus) (UniversalSerialBus, USB) specification.
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| CN109921959A (en) * | 2019-03-22 | 2019-06-21 | 维沃移动通信有限公司 | A kind of parameter regulation means and communication equipment |
| CN115114217B (en) * | 2022-05-07 | 2025-01-03 | 浙江华睿科技股份有限公司 | A method for improving data transmission quality, USB device and storage medium |
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| US5438699A (en) * | 1992-06-09 | 1995-08-01 | Coveley; Michael | Adaptive system for self-tuning a receiver in an RF communication system |
| CN101354688A (en) * | 2007-07-27 | 2009-01-28 | 佛山市顺德区顺达电脑厂有限公司 | Apparatus and method for regulating data transmission velocity |
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| US6735543B2 (en) * | 2001-11-29 | 2004-05-11 | International Business Machines Corporation | Method and apparatus for testing, characterizing and tuning a chip interface |
| US8104950B2 (en) * | 2007-12-07 | 2012-01-31 | Finisar Corporation | Avoiding air flow penetration in temperature measurement |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US5438699A (en) * | 1992-06-09 | 1995-08-01 | Coveley; Michael | Adaptive system for self-tuning a receiver in an RF communication system |
| CN101354688A (en) * | 2007-07-27 | 2009-01-28 | 佛山市顺德区顺达电脑厂有限公司 | Apparatus and method for regulating data transmission velocity |
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