CN110633242A - Control circuit of serial port communication circuit - Google Patents
Control circuit of serial port communication circuit Download PDFInfo
- Publication number
- CN110633242A CN110633242A CN201910736699.0A CN201910736699A CN110633242A CN 110633242 A CN110633242 A CN 110633242A CN 201910736699 A CN201910736699 A CN 201910736699A CN 110633242 A CN110633242 A CN 110633242A
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- Prior art keywords
- resistor
- triode
- serial port
- circuit
- capacitor
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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
- G06F13/40—Bus structure
- G06F13/4063—Device-to-bus coupling
- G06F13/4068—Electrical coupling
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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
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2213/00—Indexing scheme relating to interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F2213/0002—Serial port, e.g. RS232C
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- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Cookers (AREA)
Abstract
The invention discloses a control circuit of a serial port communication circuit, which comprises a main control board circuit and a display board circuit; the main control board circuit comprises a triode Q1, a triode Q2 and a serial port CN1, wherein a collector of the triode Q1 is connected with a resistor R1 and a capacitor C1, an emitter of the triode Q1 is connected with a resistor R5, a capacitor C1 and the ground, the other end of a resistor R1 is connected with the resistor R2, a resistor R3 and a power supply connected with 5V, the other end of the resistor R2 is connected with a pin 3 of the capacitor C3 and the serial port CN1 and a collector of the triode Q2, and the other end of the resistor R3 is connected with a pin 2 of the capacitor C2, the resistor R4 and the serial port CN 1. The anti-interference performance of the whole household appliance product is obviously enhanced, and the electrical performance of the product is more optimized.
Description
Technical Field
The invention relates to the technical field of communication, in particular to a control circuit of a serial communication circuit.
Background
At present, a common household appliance control part, a communication circuit between a main control board and a display board is shown in fig. 1 and 2, CN1 and CN2 are connected by a flat cable, a main control board CPU chip sends a signal through a resistor R3 and receives the signal for a display board CPU chip through a resistor R5, after the display board receives a designation, the display board sends the signal through a resistor R6, the main control board CPU chip receives the signal through a resistor R4, the main control board and the display board transmit an instruction mutually to meet the communication requirement, the mode of directly carrying out communication control with the display board is easy to interfere, and the anti-interference capability needs to be improved and optimized.
Disclosure of Invention
The present invention is directed to a control circuit for a serial communication circuit, so as to solve the problems in the background art.
In order to achieve the purpose, the invention provides the following technical scheme:
a control circuit of a serial port communication circuit comprises a main control board circuit and a display board circuit; the display panel comprises a triode Q1, a triode Q2 and a serial port CN1, wherein the collector of the triode Q1 is connected with a resistor R1 and a capacitor C1, the emitter of the triode Q1 is connected with a resistor R5, a capacitor C1 and the ground, the other end of the resistor R1 is connected with a resistor R2, a resistor R3 and a 5V power supply, the other end of the resistor R2 is connected with a capacitor C3, a pin 3 of the serial port CN1 and the collector of the triode Q2, the other end of the resistor R3 is connected with a capacitor C2, a resistor R4 and a pin 2 of the serial port CN1, the other end of the resistor R4 is connected with the other end of the resistor R5 and the base of the triode Q1, the base of the triode Q2 is connected with the resistor R7 and the resistor R8, the other end of the resistor R8 is connected with the resistor R8 and the main control panel CPU, the display panel comprises a triode Q8, the collector of the transistor Q8 and the emitter of the serial port CN 8, the base of a triode Q3 is connected with the other end of a resistor R15 and a resistor R14, the other end of a resistor R14 is connected with a resistor R13 and a display panel CPU, the other end of a resistor R13 is connected with a resistor R12 and a 5V power supply, the other end of a resistor R12 is connected with a resistor R11, a capacitor C7 and the collector of a triode Q4, the base of a triode Q4 is connected with a resistor R9 and a resistor R10, the other end of the resistor R9 is connected with a capacitor C6 and a pin 3 of a serial port CN2, a main control panel circuit is connected with a serial port CN 35 2 of the display panel circuit through a serial port CN1, and the other end.
As a further technical scheme of the invention: the serial port CN1 and the serial port CN2 are connected by a flat cable.
Compared with the prior art, the invention has the beneficial effects that: the control circuit of the serial communication circuit has stable and reliable performance and strong anti-interference capability. The anti-interference performance of the whole household appliance product is obviously enhanced, and the electrical performance of the product is more optimized.
Drawings
FIG. 1 is a circuit diagram of a prior art main control board circuit;
FIG. 2 is a circuit diagram of a prior art display panel circuit;
FIG. 3 is a circuit diagram of the main control board circuit of the present invention;
fig. 4 is a circuit diagram of the display panel circuit of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1: referring to fig. 3-4, a control circuit of a serial communication circuit includes a main control board circuit and a display board circuit; the display panel comprises a triode Q1, a triode Q2 and a serial port CN1, wherein the collector of the triode Q1 is connected with a resistor R1 and a capacitor C1, the emitter of the triode Q1 is connected with a resistor R5, a capacitor C1 and the ground, the other end of the resistor R1 is connected with a resistor R2, a resistor R3 and a 5V power supply, the other end of the resistor R2 is connected with a capacitor C3, a pin 3 of the serial port CN1 and the collector of the triode Q2, the other end of the resistor R3 is connected with a capacitor C2, a resistor R4 and a pin 2 of the serial port CN1, the other end of the resistor R4 is connected with the other end of the resistor R5 and the base of the triode Q1, the base of the triode Q2 is connected with the resistor R7 and the resistor R8, the other end of the resistor R8 is connected with the resistor R8 and the main control panel CPU, the display panel comprises a triode Q8, the collector of the transistor Q8 and the emitter of the serial port CN 8, the base of a triode Q3 is connected with the other end of a resistor R15 and a resistor R14, the other end of a resistor R14 is connected with a resistor R13 and a display panel CPU, the other end of a resistor R13 is connected with a resistor R12 and a 5V power supply, the other end of a resistor R12 is connected with a resistor R11, a capacitor C7 and the collector of a triode Q4, the base of a triode Q4 is connected with a resistor R9 and a resistor R10, the other end of the resistor R9 is connected with a capacitor C6 and a pin 3 of a serial port CN2, a main control panel circuit is connected with a serial port CN 35 2 of the display panel circuit through a serial port CN1, and the other end. Serial port CN1 and serial port CN2 are connected by flat cables. The main control board CPU chip sends high level signal through the resistor R6, controls the base of the triode Q2, the triode Q2 is conducted, the collector (CN 1_3 pin) is low level and is transmitted to the base of the Q4 of the display board through a lead, the triode Q4 is cut off, and the CPU chip of the display board receives high level through the resistor R11. The main control board CPU chip sends low level signal through resistance R6, triode Q2 does not work, collector (CN 1_3 pin) is high level, and is transmitted to the Q4 base of the display panel through the wire, triode Q4 is conducted, and the CPU chip of the display panel receives low level through resistance R11. Similarly, the display panel CPU chip transmits signals to the main control panel CPU chip.
Example 2: on the basis of example 1: the model of triode Q1, triode Q2, triode Q3 and triode Q4 are 9013, and the 9013 type triode is small in size, low in cost, stable in performance and suitable for being used in the design.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (2)
1. A control circuit of a serial port communication circuit comprises a main control board circuit and a display board circuit; the display panel comprises a triode Q1, a triode Q2 and a serial port CN1, wherein the collector of the triode Q1 is connected with a resistor R1 and a capacitor C1, the emitter of the triode Q1 is connected with a resistor R5, a capacitor C1 and ground, the other end of the resistor R1 is connected with a resistor R2, a resistor R3 and a 5V power supply, the other end of the resistor R2 is connected with a capacitor C3, a pin 3 of a serial port CN1 and the collector of the triode Q2, the other end of the resistor R3 is connected with a capacitor C2, a resistor R4 and a pin 2 of the serial port CN1, the other end of the resistor R4 is connected with the other end of a resistor R5 and the base of the triode Q1, the base of the triode Q2 is connected with a resistor R7 and a resistor R8, the other end of the resistor R7 is connected with a resistor R6 and a main control panel CPU, the display panel comprises a triode Q6, the emitter of the triode Q6, the triode Q6 and the serial port CN 6, the collector of the, The circuit comprises a resistor R15 and the ground, the base of a triode Q3 is connected with the other end of a resistor R15 and a resistor R14, the other end of a resistor R14 is connected with a resistor R13 and a display panel CPU, the other end of a resistor R13 is connected with resistors R12 and a 5V power supply, the other end of a resistor R12 is connected with a resistor R11, a capacitor C7 and the collector of a triode Q4, the base of a triode Q4 is connected with a resistor R9 and a resistor R10, the other end of a resistor R9 is connected with a capacitor C6 and a pin 3 of a serial port CN2, a main control panel circuit is connected with a serial port CN2 of the display panel circuit through the serial port CN1, and.
2. The control circuit of claim 1, wherein the serial port CN1 and the serial port CN2 are connected by a flat cable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910736699.0A CN110633242A (en) | 2019-08-10 | 2019-08-10 | Control circuit of serial port communication circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910736699.0A CN110633242A (en) | 2019-08-10 | 2019-08-10 | Control circuit of serial port communication circuit |
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| Publication Number | Publication Date |
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| CN110633242A true CN110633242A (en) | 2019-12-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910736699.0A Pending CN110633242A (en) | 2019-08-10 | 2019-08-10 | Control circuit of serial port communication circuit |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103457595A (en) * | 2012-06-01 | 2013-12-18 | 海尔集团公司 | Single chip microcomputer full duplex communication device and communication method |
| CN203608175U (en) * | 2013-11-29 | 2014-05-21 | 深圳市航盛电子股份有限公司 | Circuit improving I2C anti-interference capability |
| US20160142370A1 (en) * | 2013-06-28 | 2016-05-19 | Schneider Electric It Corporation | System and method for automatically addressing devices in a multi-drop master/slave network |
| CN106790761A (en) * | 2017-01-05 | 2017-05-31 | 广州南盾通讯设备有限公司 | Host node distribution, the method from node acquisition address, bus address auto-allocation method and device under ModBus buses |
| CN108036518A (en) * | 2018-01-02 | 2018-05-15 | 成都前锋电子有限责任公司 | A kind of expansible communication system of gas instantaneous water heater compatibility |
| WO2018114937A2 (en) * | 2016-01-19 | 2018-06-28 | Elmos Semiconductor Aktiengesellschaft | Concatenated two-wire data bus consisting of two single-wire data buses, each with a plurality of differential levels for transmitting illumination data on the basis of the jtag protocol |
| CN208777007U (en) * | 2018-08-17 | 2019-04-23 | 宁波思朗智能科技发展有限公司 | A kind of air exhaust dryer button controller |
-
2019
- 2019-08-10 CN CN201910736699.0A patent/CN110633242A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103457595A (en) * | 2012-06-01 | 2013-12-18 | 海尔集团公司 | Single chip microcomputer full duplex communication device and communication method |
| US20160142370A1 (en) * | 2013-06-28 | 2016-05-19 | Schneider Electric It Corporation | System and method for automatically addressing devices in a multi-drop master/slave network |
| CN203608175U (en) * | 2013-11-29 | 2014-05-21 | 深圳市航盛电子股份有限公司 | Circuit improving I2C anti-interference capability |
| WO2018114937A2 (en) * | 2016-01-19 | 2018-06-28 | Elmos Semiconductor Aktiengesellschaft | Concatenated two-wire data bus consisting of two single-wire data buses, each with a plurality of differential levels for transmitting illumination data on the basis of the jtag protocol |
| CN106790761A (en) * | 2017-01-05 | 2017-05-31 | 广州南盾通讯设备有限公司 | Host node distribution, the method from node acquisition address, bus address auto-allocation method and device under ModBus buses |
| CN108036518A (en) * | 2018-01-02 | 2018-05-15 | 成都前锋电子有限责任公司 | A kind of expansible communication system of gas instantaneous water heater compatibility |
| CN208777007U (en) * | 2018-08-17 | 2019-04-23 | 宁波思朗智能科技发展有限公司 | A kind of air exhaust dryer button controller |
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Application publication date: 20191231 |
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