CN104834625A - Single-wire communication device between two devices and bidirectional communication control method thereof - Google Patents
Single-wire communication device between two devices and bidirectional communication control method thereof Download PDFInfo
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- CN104834625A CN104834625A CN201510282759.8A CN201510282759A CN104834625A CN 104834625 A CN104834625 A CN 104834625A CN 201510282759 A CN201510282759 A CN 201510282759A CN 104834625 A CN104834625 A CN 104834625A
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- 230000006854 communication Effects 0.000 title claims abstract description 60
- 238000004891 communication Methods 0.000 title claims abstract description 60
- 238000000034 method Methods 0.000 title claims abstract description 9
- 230000007175 bidirectional communication Effects 0.000 title abstract 2
- 238000001914 filtration Methods 0.000 claims abstract description 11
- 230000005540 biological transmission Effects 0.000 claims description 23
- 238000009790 rate-determining step (RDS) Methods 0.000 claims description 18
- 239000003990 capacitor Substances 0.000 claims description 8
- 238000005516 engineering process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
Classifications
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F13/38—Information transfer, e.g. on bus
- G06F13/42—Bus transfer protocol, e.g. handshake; Synchronisation
- G06F13/4282—Bus transfer protocol, e.g. handshake; Synchronisation on a serial bus, e.g. I2C bus, SPI bus
Abstract
The invention discloses a single-wire communication device between two devices and a bidirectional communication control method thereof, wherein the communication device comprises 2 sending/receiving modules and 1 communication wire connected between the two sending/receiving modules, each sending/receiving module comprises a data sending connecting end used for being connected with a data sending end of an external device, a data receiving connecting end used for being connected with a data receiving end of the external device and a grounding connecting end used for being connected with a grounding end of the external device, a forward diode module is connected between the data sending connecting end and the communication wire, a resistance current-limiting module is connected between the data receiving connecting end and the communication wire, and a pull-down resistance module and a capacitance filtering module are respectively connected between the communication wire and the grounding connecting end. The present case simple structure easily realizes, saves the wire rod, and communication control is convenient moreover.
Description
[technical field]
The present invention relates to single-wire communication device and both-way communication control method thereof between a kind of two equipment.
[background technology]
At present, the communication modes between electronic circuit is mainly divided into parallel communication and serial communication: the advantage of parallel communication is that communications protocol is simple, and shortcoming is that signal wire is more; The advantage of serial communication is that signal wire is less, easily realizes long-distance transmissions, and shortcoming is that communications protocol is complicated, and namely interface circuit is complicated.
General low and middle-end electronic product, such as, signal between main frame with liquid crystal driving module is connected, single-chip microcomputer and light-emitting element array, communication between charactron, these communication interfaces generally only carry out one-way data transfer, and to data rate also less demanding Microsecond grade even Millisecond, but all need communication interface simple as much as possible, be easy to realize, and because LCD MODULE, charactron is generally arranged on electronic product, on the panel of instrument and equipment, and there is a segment distance between main frame, so be not suitable for using parallel communication, this just needs a kind of agreement simple, easy realization, the serial communication interface that Seize ACK message line is less.
Conventional universal serial bus has I2C, USB etc., serial line interface has SPI, RS232 etc., wherein I2C, the communications protocol more complicated of USB and RS232, realize cost slightly high, be not suitable for general low and middle-end electronic product, the communications protocol of SPI is not very complicated, but need 3 to 4 signal wires, in addition, also have the 3 line serial line interfaces that a kind of industry is conventional, there is position datawire, bit clock line, frame completes line/frame loaded line, bit data output line is also wanted for transmitted in both directions, its protocol comparison is simple, but it is the same with SPI, because signal wire is more, the advantage of serial communication can not be brought into play completely.
Therefore, be necessary to solve as above problem.
[summary of the invention]
Instant invention overcomes the deficiency of above-mentioned technology, provide single-wire communication device and both-way communication control method thereof between a kind of two equipment, its structure is simple and easy to realize, and saves wire rod, and Communication Control is convenient.
For achieving the above object, present invention employs following technical proposal:
Single-wire communication device between a kind of two equipment, include 2 transmission/reception module 10 and be connected to 1 connection 20 between two transmission/reception module 10, the data that each transmission/reception module 10 includes for being connected with external device data transmitting terminal send link 11, for the data receiver link 12 be connected with external device data receiving end, and the grounding connection end 13 for being connected with external unit earth terminal, described data send between link 11 and described connection 20 and are connected with forward diode module 14, resistance current limliting module 15 is connected with between described data receiver link 12 and described connection 20, the pull down resistor module 16 be connected between described connection 20 and described grounding connection end 13 and capacitor filtering module 17.
Single-wire communication device between a kind of two equipment as above, described forward diode module 14 includes forward serial or parallel connection several forward diode between described data transmission link 11 and described connection 20.
Single-wire communication device between a kind of two equipment as above, described resistance current limliting module 15 comprises serial or parallel connection several resistance between described data receiver link 12 and described connection 20.
Single-wire communication device between a kind of two equipment as above, described pull down resistor module 16 includes serial or parallel connection several resistance between described connection 20 and described grounding connection end 13.
Single-wire communication device between a kind of two equipment as above, described capacitor filtering module 17 includes serial or parallel connection several electric capacity between described connection 20 and described grounding connection end 13.
The both-way communication control method of single-wire communication device between two equipment described above, includes following steps:
Opportunity awaiting control for linear step, connected data are sent link 11 and are set to low level by certain equipment, and detect level conditions on described connection 20 in real time by connected data receiver link 12;
Data send rate-determining steps, when certain equipment needs to send data, first detect the level conditions of described connection 20 in time T by connected data receiver link 12, when high level having been detected in time T, this equipment enters data receiver rate-determining steps, and when high level not detected in time T, this equipment sends link 11 by described data and send low and high level data on described connection 20, data are sent, and certain equipment reenters Opportunity awaiting control for linear step;
Data receiver rate-determining steps, when certain equipment is detected on connection 20 described in certain moment with low and high level data by described data receiver link 12, if this equipment judges self not in transmission data, the then low and high level data that receive from described data receiver link 12 of this device storage, and when this equipment does not detect low and high level data in time T, this equipment reenters Opportunity awaiting control for linear step, if this equipment judges that self sends data, then enter preset priority rate-determining steps;
Preset priority rate-determining steps, certain equipment judges self preset priority level height, if preset priority level is high, then this equipment continues through described data transmission link 11 and send low and high level data on described connection 20, if preset priority level is low, then this equipment enters Opportunity awaiting control for linear step.
Compared with prior art, the invention has the beneficial effects as follows:
1, this case single-wire communication apparatus structure is simple and easy to realize, by the two ends of 1 connection, the single-wire communication function that the identical transmission/reception module of structure realizes between two equipment is set, each transmission/reception module comprises data and sends link, data receiver link, and grounding connection end, data send between link and connection and are connected with forward diode module, effectively data can be sent on connection while playing buffer action, resistance current limliting module is connected with between data receiver link and connection, effectively overcurrent protection is carried out to data receiver link, pull down resistor module is connected with between connection and grounding connection end, being convenient to drop-down for connection level making during its idle condition is low level, capacitor filtering module is also connected with between connection and grounding connection end, be convenient to filtering reduction connection disturbs, improve communication quality.
2, this case both-way communication control method comprises Opportunity awaiting control for linear step, data send rate-determining steps, data receiver rate-determining steps and preset priority rate-determining steps, and its control is simple and convenient, and the both-way communication effectively realizing single-wire communication device controls.
[accompanying drawing explanation]
Fig. 1 is circuit diagram of the present invention.
[embodiment]
Feature of the present invention and other correlated characteristic are described in further detail by embodiment below in conjunction with accompanying drawing, so that the understanding of technician of the same trade:
As shown in Figure 1, single-wire communication device between a kind of two equipment, include 2 transmission/reception module 10 and be connected to 1 connection 20 between two transmission/reception module 10, the data that each transmission/reception module 10 includes for being connected with external device data transmitting terminal send link 11, for the data receiver link 12 be connected with external device data receiving end, and the grounding connection end 13 for being connected with external unit earth terminal, described data send between link 11 and described connection 20 and are connected with forward diode module 14, resistance current limliting module 15 is connected with between described data receiver link 12 and described connection 20, the pull down resistor module 16 be connected between described connection 20 and described grounding connection end 13 and capacitor filtering module 17.
Single-wire communication device between a kind of two equipment as above, described forward diode module 14 includes forward serial or parallel connection several forward diode between described data transmission link 11 and described connection 20.
Single-wire communication device between a kind of two equipment as above, described resistance current limliting module 15 comprises serial or parallel connection several resistance between described data receiver link 12 and described connection 20.
Single-wire communication device between a kind of two equipment as above, described pull down resistor module 16 includes serial or parallel connection several resistance between described connection 20 and described grounding connection end 13.
Single-wire communication device between a kind of two equipment as above, described capacitor filtering module 17 includes serial or parallel connection several electric capacity between described connection 20 and described grounding connection end 13.
As mentioned above, the both-way communication control method of single-wire communication device between above-mentioned two equipment is also protected in this case, and it includes following steps:
Opportunity awaiting control for linear step, connected data are sent link 11 and are set to low level by certain equipment, and detect level conditions on described connection 20 in real time by connected data receiver link 12;
Data send rate-determining steps, when certain equipment needs to send data, first detect the level conditions of described connection 20 in time T by connected data receiver link 12, when high level having been detected in time T, this equipment enters data receiver rate-determining steps, and when high level not detected in time T, this equipment sends link 11 by described data and send low and high level data on described connection 20, data are sent, and certain equipment reenters Opportunity awaiting control for linear step;
Data receiver rate-determining steps, when certain equipment is detected on connection 20 described in certain moment with low and high level data by described data receiver link 12, if this equipment judges self not in transmission data, the then low and high level data that receive from described data receiver link 12 of this device storage, and when this equipment does not detect low and high level data in time T, this equipment reenters Opportunity awaiting control for linear step, if this equipment judges that self sends data, then enter preset priority rate-determining steps;
Preset priority rate-determining steps, certain equipment judges self preset priority level height, if preset priority level is high, then this equipment continues through described data transmission link 11 and send low and high level data on described connection 20, if preset priority level is low, then this equipment enters Opportunity awaiting control for linear step.
As mentioned above, this case single-wire communication apparatus structure is simple and easy to realize, by the two ends of 1 connection 20, the single-wire communication function that the identical transmission/reception module of structure 10 realizes between two equipment is set, each transmission/reception module 10 comprises data and sends link 11, data receiver link 12, and grounding connection end 13, data send between link 11 and connection 20 and are connected with forward diode module 14, effectively data can be sent on connection 20 while playing buffer action, resistance current limliting module 15 is connected with between data receiver link 12 and connection 20, effectively overcurrent protection is carried out to data receiver link 12, pull down resistor module 16 is connected with between connection 20 and grounding connection end 13, being convenient to drop-down for connection 20 level making during its idle condition is low level, capacitor filtering module 17 is also connected with between connection 20 and grounding connection end 13, be convenient to filtering and reduce interference on connection 20, improve communication quality.All technical schemes identical or close with this case structure all should be shown for falling in the protection domain of this case.
Claims (6)
1. single-wire communication device between an equipment, it is characterized in that 1 connection (20) including 2 transmission/reception module (10) and be connected between two transmission/reception module (10), each transmission/reception module (10) data included for being connected with external device data transmitting terminal send link (11), for the data receiver link (12) be connected with external device data receiving end, and the grounding connection end (13) for being connected with external unit earth terminal, described data send between link (11) and described connection (20) and are connected with forward diode module (14), resistance current limliting module (15) is connected with between described data receiver link (12) and described connection (20), the pull down resistor module (16) be connected between described connection (20) and described grounding connection end (13) and capacitor filtering module (17).
2. single-wire communication device between a kind of two equipment according to claim 1, is characterized in that described forward diode module (14) includes forward serial or parallel connection several forward diode between described data transmission link (11) and described connection (20).
3. single-wire communication device between a kind of two equipment according to claim 1, is characterized in that described resistance current limliting module (15) comprises serial or parallel connection several resistance between described data receiver link (12) and described connection (20).
4. single-wire communication device between a kind of two equipment according to claim 1, is characterized in that described pull down resistor module (16) includes serial or parallel connection several resistance between described connection (20) and described grounding connection end (13).
5. single-wire communication device between a kind of two equipment according to claim 1, is characterized in that described capacitor filtering module (17) includes serial or parallel connection several electric capacity between described connection (20) and described grounding connection end (13).
6. adopt a both-way communication control method for single-wire communication device between two equipment described in claim 1-5 any one, it is characterized in that including following steps:
Opportunity awaiting control for linear step, connected data are sent link (11) and are set to low level by certain equipment, and detect the upper level conditions of described connection (20) in real time by connected data receiver link (12);
Data send rate-determining steps, when certain equipment needs to send data, first detect described connection (20) level conditions in time T by connected data receiver link (12), when high level having been detected in time T, this equipment enters data receiver rate-determining steps, when high level not detected in time T, this equipment sends link (11) by described data and sends low and high level data to described connection (20) is upper, data are sent, and certain equipment reenters Opportunity awaiting control for linear step;
Data receiver rate-determining steps, when by described data receiver link (12), certain equipment detects that connection (20) described in certain moment is upper with low and high level data, if this equipment judges self not in transmission data, the then low and high level data that receive from described data receiver link (12) of this device storage, and when this equipment does not detect low and high level data in time T, this equipment reenters Opportunity awaiting control for linear step, if this equipment judges that self sends data, then enter preset priority rate-determining steps;
Preset priority rate-determining steps, certain equipment judges self preset priority level height, if preset priority level is high, then this equipment continues through described data and sends link (11) to described connection (20) upper transmission low and high level data, if preset priority level is low, then this equipment enters Opportunity awaiting control for linear step.
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| CN201510282759.8A CN104834625B (en) | 2015-05-28 | 2015-05-28 | Single-wire communication device between two devices and bidirectional communication control method thereof |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106227691A (en) * | 2016-08-09 | 2016-12-14 | 苏交科集团股份有限公司 | A kind of based on the reciprocity bi-directional single-wire serial communication protocol between MCU |
| CN106385304A (en) * | 2016-08-31 | 2017-02-08 | 华为技术有限公司 | Data transmission method, device and system |
| CN106528484A (en) * | 2016-10-28 | 2017-03-22 | 中国科学院上海微系统与信息技术研究所 | Serial communication method |
| CN110176945A (en) * | 2019-05-15 | 2019-08-27 | 金华市西祠安防科技有限公司 | A kind of novel single-wire communication system mode |
| CN112003775A (en) * | 2020-07-27 | 2020-11-27 | 苏州浪潮智能科技有限公司 | Single-level single-wire full-duplex bus communication method and system |
| CN113747627A (en) * | 2021-11-08 | 2021-12-03 | 深圳合芯谷微电子有限公司 | Method and system for rapid communication of series LED lamp beads |
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| CN106528484A (en) * | 2016-10-28 | 2017-03-22 | 中国科学院上海微系统与信息技术研究所 | Serial communication method |
| CN110176945A (en) * | 2019-05-15 | 2019-08-27 | 金华市西祠安防科技有限公司 | A kind of novel single-wire communication system mode |
| CN112003775A (en) * | 2020-07-27 | 2020-11-27 | 苏州浪潮智能科技有限公司 | Single-level single-wire full-duplex bus communication method and system |
| CN112003775B (en) * | 2020-07-27 | 2022-02-18 | 苏州浪潮智能科技有限公司 | Single-level single-wire full-duplex bus communication method and system |
| US11741037B2 (en) | 2020-07-27 | 2023-08-29 | Inspur Suzhou Intelligent Technology Co., Ltd. | Single-level single-line full-duplex bus communication method and system |
| CN113747627A (en) * | 2021-11-08 | 2021-12-03 | 深圳合芯谷微电子有限公司 | Method and system for rapid communication of series LED lamp beads |
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