CN206249301U - A kind of short distance UART bus communication structures - Google Patents
A kind of short distance UART bus communication structures Download PDFInfo
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- CN206249301U CN206249301U CN201621183878.4U CN201621183878U CN206249301U CN 206249301 U CN206249301 U CN 206249301U CN 201621183878 U CN201621183878 U CN 201621183878U CN 206249301 U CN206249301 U CN 206249301U
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Abstract
The utility model discloses a kind of short distance UART bus communication structures, its structure is：In equipment transmitting terminal, a Zener diode is all connected with per the TX ends of pipeline equipment serial ports, and is connected to Zener diode negative pole, a first resistor is all connected with per the RX ends of pipeline equipment serial ports, be attached to one end of corresponding first resistor；In equipment receiving terminal, all of Zener diode positive pole is connected, and is connected to serial port of host computer RX ends by second resistance, and the other end of all of first resistor is connected, and is connected to serial port of host computer TX ends by 3rd resistor.The utility model is added one " thresholding " to each transmitting terminal, i.e. Zener diode, allows transmitting terminal mutually to avoid interference, and greatly saves considerable amount of hardware communication element, and reduces cost reduces power consumption, saves motherboard space.
Description
Technical field
The utility model is related to bus communication field, and in particular to a kind of short distance UART bus communication structures.
Background technology
UART, full name Universal Asynchronous Receiver/Transmitter, i.e. universal asynchronous receiving-transmitting are passed
Defeated device, is a part for computer hardware, by data by making transmission conversion between serial communication and parallel communications.Specifically object display is
Independent modularization chip, or as the peripheral equipment being integrated in microprocessor.General and RS-232C specifications, it is similar to
The standard signal amplitude conversion chip of the MAX232 of Maxim etc is arranged in pairs or groups, used as the interface of connection external equipment.
UART is used for asynchronous communication, the bus two-way communication, it is possible to achieve full duplex transmission and reception.In embedded design
In, UART communicates for main frame with auxiliary equipment, such as the communication between automobile audio and external AP, communicated with PC including with prison
Control debugger and other devices, such as EEPROM communications.
Computer-internal uses parallel data, it is impossible to data are directly dealt into Modem, it is necessary to arrange just enter by UART
Line asynchronous is transmitted, and its process is：CPU is first put into the data for preparing write-in serial device in the register (interim memory block) of UART
In, then serial device is sent to by FIFO (First Input First Output, First Input First Output), if not having
FIFO, information will become disorderly and unsystematic, it is impossible to be sent to Modem.It is the chip for control computer and serial device.
Have a little it should be noted that it provide RS-232C data terminal equipment interfaces, such computer just can and modem
Or other are communicated using the serial device of RS-232C interfaces.
Used as a part for interface, UART also provides following functions：The parallel data that will be sent by computer-internal
Be converted to the serial data stream of output.The serial data come outside computer is converted into byte, for computer-internal and line number
According to device use.Parity check bit is added in the serial data stream of output, and to being carried out very from the data flow of external reception
Even parity check.Start and stop mark is added in output stream, and start and stop mark is deleted from data flow is received.Place reason keyboard or mouse
The interrupt signal that mark sends (keyboard and mouse are also serial device).The lock-in tube of computer and external series equipment can be processed
Reason problem.There are some that the buffering area of inputoutput data is also provided than the UART of higher gears, relatively newer UART is 16550, it
Can be before computer need processing data in its byte data of buffering area memory storage 16, and common UART is 8250.If
You buy a built-in modem, and this modem inside generally just has 16550UART.
Traditional TTL (Transistor-Transistor Logic, logic gates) communication mode is a kind of one-to-one
Serial communication mode.The reason for traditional TTL communications can not realize one-to-many be, it is impossible to realizes multiple transmitting terminal sending signals
One receiving terminal receives the ability of signal, and multiple signals can be disturbed each other when multiple transmitting terminal sending signals, be caused
Accurate signal is not received.
Utility model content
Technical problem to be solved in the utility model is to provide a kind of short distance UART bus communication structures, is a kind of one
To many serial ports, change traditional communication mode.
In order to solve the above technical problems, the technical solution adopted in the utility model is：
A kind of short distance UART bus communication structures, its structure is：In equipment transmitting terminal, the TX ends per pipeline equipment serial ports are all
A Zener diode is connected with, and is connected to Zener diode negative pole, the RX ends per pipeline equipment serial ports are all connected with one the
One resistance, is attached to one end of corresponding first resistor；In equipment receiving terminal, all of Zener diode positive pole is connected, and logical
Cross second resistance and be connected to serial port of host computer RX ends, the other end of all of first resistor is connected, and is connected to by 3rd resistor
Serial port of host computer TX ends.
According to such scheme, all devices are all altogether.
According to such scheme, in equipment transmitting terminal, six pipeline equipment serial ports are provided with.
Compared with prior art, the beneficial effects of the utility model are：The utility model adds one to each transmitting terminal
Individual " thresholding ", i.e. Zener diode, allow transmitting terminal mutually to avoid interference, and greatly save considerable amount of hardware communication element (such as：
485th, Mbus etc.), reduces cost reduces power consumption, saves motherboard space.
Brief description of the drawings
Fig. 1 is a kind of short distance UART bus communication structure schematic diagrames of the utility model.
Specific embodiment
The utility model is described in further detail with reference to the accompanying drawings and detailed description.The utility model knot
Structure is used and added one " thresholding " to each transmitting terminal, i.e. Zener diode, allows transmitting terminal mutually to avoid interference, and realizes short distance
From UART bus communications, considerable amount of hardware communication element is greatly saved (such as：485th, Mbus etc.), cost is greatly reduced,
Power consumption is greatly reduced, motherboard space is greatly saved.
Embodiment 1
A kind of short distance UART bus communication structures, its structure is：In equipment transmitting terminal, the TX ends per pipeline equipment serial ports are all
A Zener diode is connected with, and is connected to Zener diode negative pole, the RX ends per pipeline equipment serial ports are all connected with one the
One resistance, is attached to one end of corresponding first resistor；In equipment receiving terminal, all of Zener diode positive pole is connected, and logical
Cross second resistance and be connected to serial port of host computer RX ends, the other end of all of first resistor is connected, and is connected to by 3rd resistor
Serial port of host computer TX ends.
Embodiment 2
A kind of short distance UART bus communication structures, its structure is：In equipment transmitting terminal, the TX ends per pipeline equipment serial ports are all
A Zener diode is connected with, and is connected to Zener diode negative pole, the RX ends per pipeline equipment serial ports are all connected with one the
One resistance, is attached to one end of corresponding first resistor；In equipment receiving terminal, all of Zener diode positive pole is connected, and logical
Cross second resistance and be connected to serial port of host computer RX ends, the other end of all of first resistor is connected, and is connected to by 3rd resistor
Serial port of host computer TX ends, all devices are all altogether.
Embodiment 3
A kind of short distance UART bus communication structures, its structure is：In equipment transmitting terminal, the TX ends per pipeline equipment serial ports are all
A Zener diode is connected with, and is connected to Zener diode negative pole, the RX ends per pipeline equipment serial ports are all connected with one the
One resistance, is attached to one end of corresponding first resistor；In equipment receiving terminal, all of Zener diode positive pole is connected, and logical
Cross second resistance and be connected to serial port of host computer RX ends, the other end of all of first resistor is connected, and is connected to by 3rd resistor
Serial port of host computer TX ends, in equipment transmitting terminal, are provided with six pipeline equipment serial ports.
Claims (3)
1. a kind of short distance UART bus communication structures, it is characterised in that in equipment transmitting terminal, the TX ends per pipeline equipment serial ports are all
A Zener diode is connected with, and is connected to Zener diode negative pole, the RX ends per pipeline equipment serial ports are all connected with one the
One resistance, is attached to one end of corresponding first resistor；In equipment receiving terminal, all of Zener diode positive pole is connected, and logical
Cross second resistance and be connected to serial port of host computer RX ends, the other end of all of first resistor is connected, and is connected to by 3rd resistor
Serial port of host computer TX ends.
2. a kind of short distance UART bus communication structures as claimed in claim 1, it is characterised in that all devices are all altogether.
3. a kind of short distance UART bus communication structures as claimed in claim 1 or 2, it is characterised in that in equipment transmitting terminal,
It is provided with six pipeline equipment serial ports.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621183878.4U CN206249301U (en) | 2016-11-03 | 2016-11-03 | A kind of short distance UART bus communication structures |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621183878.4U CN206249301U (en) | 2016-11-03 | 2016-11-03 | A kind of short distance UART bus communication structures |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206249301U true CN206249301U (en) | 2017-06-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201621183878.4U Active CN206249301U (en) | 2016-11-03 | 2016-11-03 | A kind of short distance UART bus communication structures |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107704415A (en) * | 2017-11-06 | 2018-02-16 | 郑州华力信息技术有限公司 | Simple RS232 multifunctional serial port expanding units |
| CN111427824A (en) * | 2020-03-30 | 2020-07-17 | 深圳市汇川技术股份有限公司 | Serial port communication circuit |
| CN114301732A (en) * | 2022-03-08 | 2022-04-08 | 深圳市驰普科达科技有限公司 | Circuit for realizing bus communication, bus communication system and power supply energy storage device |
-
2016
- 2016-11-03 CN CN201621183878.4U patent/CN206249301U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107704415A (en) * | 2017-11-06 | 2018-02-16 | 郑州华力信息技术有限公司 | Simple RS232 multifunctional serial port expanding units |
| CN111427824A (en) * | 2020-03-30 | 2020-07-17 | 深圳市汇川技术股份有限公司 | Serial port communication circuit |
| CN111427824B (en) * | 2020-03-30 | 2022-03-04 | 深圳市汇川技术股份有限公司 | Serial port communication circuit |
| CN114301732A (en) * | 2022-03-08 | 2022-04-08 | 深圳市驰普科达科技有限公司 | Circuit for realizing bus communication, bus communication system and power supply energy storage device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20180711 Address after: 610041 Sichuan Chengdu hi tech Zone, China (Sichuan) free trade zone, 1700 north section of Tianfu Road, Chengdu hi tech Zone. Patentee after: AI noo Measurement & Technology Co., Ltd. Address before: No. 8, gaon Dong Road, high tech Zone, Chengdu, Sichuan Province Patentee before: Chengdu sound Li Deke Technology Co., Ltd. |
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| TR01 | Transfer of patent right |