CN1909606A - Single-wire pseudo two-way communication - Google Patents
Single-wire pseudo two-way communication Download PDFInfo
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- CN1909606A CN1909606A CNA2005100283904A CN200510028390A CN1909606A CN 1909606 A CN1909606 A CN 1909606A CN A2005100283904 A CNA2005100283904 A CN A2005100283904A CN 200510028390 A CN200510028390 A CN 200510028390A CN 1909606 A CN1909606 A CN 1909606A
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Abstract
The invention relates to a single-wire bidirectional communication method, which arranges circuit between two modules that exchange signal, and control the input-output port of one module to make it in two different states, to realize different transmission directions at two states, therefore; it can use one input-output wire to bidirectional transmit signal.
Description
[technical field]
The present invention relates to a kind of communication means, especially the communication means that transmits about intermodule signal in the electronic product.
[background technology]
The world today, the electronic technology develop rapidly, the electronic product of various functions has entered huge numbers of families, has improved people's living standard.But these electronic product functions are single relatively, if will realize multiple function, each electronic product need be coupled together, and the connection complexity between each electronic product, complex operation uses very inconvenient.Electronic product with multiple function is integrated into a new product with a plurality of electronic products originally, and is simple to operate because it has, with low cost, the outward appearance grace, advantages such as it is little to take up room become user's new lover, also become an important directions of industry product development
In the process that these products are integrated, circuit module co-ordination mutually with various functions, operation such as sending controling instruction, transmission operating state each other, these operations must take input/output port (the In/Out port of each module, be called for short the I/O port), former the design with regard to compact condition under, do not have the space to increase new I/O port, at this moment the original I/O port of some module will become not enough.As shown in Figure 1, be with originally independently A module and B module combinations, the A module will intercom mutually with the B module, just must take the A1 of A module, the B1 of A2 and B module, each two I/O mouth of B2, the A module does not just have abundant port to be connected with other functional module like this.Therefore after combination A, B module, the not enough situation of I/O port may appear in the A module.
Therefore, be necessary to propose a kind of new technical scheme and solve foregoing problems.
[summary of the invention]
The object of the present invention is to provide a kind of communication means, it can realize only carrying out the two-way signaling transmission by an input-output line.
For reaching above-mentioned purpose, a kind of single-wire pseudo two-way communication of the present invention, this method is used for communicating in first module and second intermodule, wherein first module has first input/output port, second module has first input/output port and second input/output port, it is characterized in that: series resistance forms bleeder circuit between second input/output port of the power supply and second module, first input/output port of first module and second module is connected in this bleeder circuit, the first signal input output end mouth of first module is changeable to be two kinds of different states of input and output, and signal is transferred to first input/output port transmission of second module from first input/output port of first module under first state; Under second state, signal is transferred to first input/output port transmission of first module from second input/output port of second module.
Compared with prior art the present invention has following beneficial effect: the present invention is by being provided with circuit between two handshaking modules, be in two kinds of different states by the input/output port of controlling a module, and the different transmission direction of realization signal under two states, reach the requirement that only just can realize the transmitted in both directions signal, under the condition of limited of module space, can save the input/output port of module with an input/output port of one of them module.
[description of drawings]
Fig. 1 is the transmission of the signal between a module schematic diagram in the prior art.
Fig. 2 is the signal transmission schematic diagram between the module of the present invention.
[embodiment]
See also shown in Figure 2ly, present embodiment is a kind of LCD TV with ground digital signal reception.It is to increase a DVB (Digital VideoBroadcasting on the basis of original television set (TV) solution, digital video broadcasting) digital received plate, from TV module 1 output order to DVB module 2, the OSD of DVB module 2 (On-Screen Display, screen display) state feedback is given TV module 1.
TV module 1 comprises the first input/output port A1 and the second input/output port A2, and DVB module 2 comprises the first input/output port B1 and the second input/output port B2.Between the second input/output port B2 of power supply VCC and DVB module 2, be in series with two resistance R 1, R2.The first input/output port A1, the B1 of TV module 1 and DVB module 2 is connected in and forms node J between aforementioned two resistance R 1, the R2.
When the user operates, TV module 1 at first needs to detect the OSD state of DVB module 2, signal demand passes to port A1 from port B2, change the high-low level of DVB module 2 software control port B2 output this moment, this moment, port A1 switched to buck stages OD door input state, the level height that node J is ordered is controlled by port B2 fully, thereby can finish the transmission from port B2 to port A1.
When TV module 1 was given an order, signal demand was by the port B1 of the port A1 input DVB module 2 of TV module 1.Switch to the first input/output port A1 of TV module 1 and recommend output state this moment, the first input/output port A1 output current of TV module 1 is enough big under this kind state, no matter how the second input/output port B2 of DVB module 2 level of ordering changes, the first input/output port A1 of TV module 1 can control the level height that node J is ordered fully, and the first input/output port B1 point of DVB module 2 then receives the signal that transmits from port A1.
Behind port A1 end of transmission, port A1 is switched to OD door input state by output state, be used to receive the signal that transmits from port B2, thus when the input/output port A1 of TV module 1 is in two kinds of different conditions, signal all can folk prescription to transmission.
The transmission direction of signal is to be controlled by the main control module of entire product, and main control module is a TV module 1 in the present embodiment, and main control module can be controlled the time and the direction of TV module 1 and 2 signal transmission of DVB module.
The signal of transmission from port A1 to port B1 with from port B2 to port A1, its content and coding can design voluntarily, can transmit data by rising or the trailing edge that detects level, also can transmit data by the pulsewidth that changes high-low level, can also utilize some coding rules commonly used to realize transfer of data, for example remote control mode transmission etc.
When signal was transferred to port A1 by port B2, this moment, port B1 also received this signal, therefore can design port B2 and be transferred to the port B1 that is coded in of port A1 to receive backsight be invalid, and this problem can solve by software.
The resistance of R1 is 10K Ω in the present embodiment, the resistance of R2 is 1K Ω, the selection of resistance R 1 and resistance R 2 resistances in other embodiments is a principle to satisfy following requirements: when signal by port A1 input port B 1 time, port A1 recommends output current much larger than the dividing potential drop electric current; When signal during by port B2 input port A1, the change in voltage that node J is ordered during port B2 control output meets the height threshold voltage of port A1.In the signal transmission, port A1, the B1 of two modules, B2 high-low level require and can match each other in addition, can not cause damage and thresholding not to match.
Communication means principle of the present invention is simple, easy to implement, increases with low costly, can save an input/output port B2 of TV module, is convenient to the mutual combination of intermodule.
Claims (6)
1. single-wire pseudo two-way communication, this method is used for communicating in first module and second intermodule, wherein first module has first input/output port, second module has first input/output port and second input/output port, it is characterized in that: series resistance forms bleeder circuit between second input/output port of the power supply and second module, first input/output port of first module and second module is connected in this bleeder circuit, the first signal input output end mouth of first module is changeable to be two kinds of different states of input and output, and signal is transferred to first input/output port transmission of second module from first input/output port of first module under first state; Under second state, signal is transferred to first input/output port transmission of first module from second input/output port of second module.
2. single-wire pseudo two-way communication as claimed in claim 1 is characterized in that: be in series with two resistance between second input/output port of the power supply and second module; First input/output port of first module and second module is connected between aforementioned two resistance and forms common junction.
3. single-wire pseudo two-way communication as claimed in claim 1, it is characterized in that: first state of first input/output port of first module is for recommending output state, the level height of described node is by first input/output port control of first module, and signal is imported the first signal input output end mouth of second module by the first signal input output end mouth of first module.
4. single-wire pseudo two-way communication as claimed in claim 1, it is characterized in that: second state of the first signal input output end mouth of first module is a buck stages OD door input state, the level height of node is controlled by second input/output port of second module fully, and signal is transferred to first input/output port of first module from second input/output port of second module.
5. single-wire pseudo two-way communication as claimed in claim 4, it is characterized in that: when signal when second input/output port of second module is transferred to first input/output port of first module, this moment second module first input/output port also receive this signal, but be considered as invalid.
6. as one of any described single-wire pseudo two-way communication of claim 1 to 5, it is characterized in that: described first module and second module are function submodule independently in the audio frequency and video electronic product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100283904A CN100384232C (en) | 2005-08-02 | 2005-08-02 | Single-wire pseudo two-way communication |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100283904A CN100384232C (en) | 2005-08-02 | 2005-08-02 | Single-wire pseudo two-way communication |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1909606A true CN1909606A (en) | 2007-02-07 |
| CN100384232C CN100384232C (en) | 2008-04-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100283904A Expired - Fee Related CN100384232C (en) | 2005-08-02 | 2005-08-02 | Single-wire pseudo two-way communication |
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| CN (1) | CN100384232C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109067505A (en) * | 2018-07-04 | 2018-12-21 | 深圳市明微电子股份有限公司 | The acquisition methods and acquisition system of feedback information |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4477896A (en) * | 1981-10-02 | 1984-10-16 | Aker Eric M | Single-wire data transmission system having bidirectional data synchronization, and D.C. power for remote units |
| DE4327035A1 (en) * | 1993-08-12 | 1995-02-16 | Daimler Benz Ag | Arrangement for bidirectional data transmission |
| CN1506865A (en) * | 2002-12-12 | 2004-06-23 | 上海科星自动化技术有限公司 | Client and server mode network |
| DE10335904B4 (en) * | 2003-08-06 | 2018-12-13 | Robert Bosch Gmbh | Method and device for bidirectional single-wire data transmission |
-
2005
- 2005-08-02 CN CNB2005100283904A patent/CN100384232C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109067505A (en) * | 2018-07-04 | 2018-12-21 | 深圳市明微电子股份有限公司 | The acquisition methods and acquisition system of feedback information |
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| Publication number | Publication date |
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| CN100384232C (en) | 2008-04-23 |
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| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
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Assignee: SHANGHAI KITKING ELECTRONIC CO., LTD. Assignor: Dongjie Electric (Shanghai) Co., Ltd. | Dongjie Electric (China) Co., Ltd. Contract record no.: 2010310000105 Denomination of invention: Single-wire pseudo two-way communication Granted publication date: 20080423 License type: Exclusive License Open date: 20070207 Record date: 20100705 |
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| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080423 Termination date: 20100802 |