CN104331382A - Multiple-serial-port data transmitting and receiving control circuit based on STM32 single chip microcomputer - Google Patents

Multiple-serial-port data transmitting and receiving control circuit based on STM32 single chip microcomputer Download PDF

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Publication number
CN104331382A
CN104331382A CN201410479177.4A CN201410479177A CN104331382A CN 104331382 A CN104331382 A CN 104331382A CN 201410479177 A CN201410479177 A CN 201410479177A CN 104331382 A CN104331382 A CN 104331382A
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China
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pin
chip
level transferring
ceramic disc
disc capacitor
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CN201410479177.4A
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CN104331382B (en
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章雪挺
曾凡宗
高祎轩
魏晗冬
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Zhejiang Morgan Intelligent Technology Co Ltd
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Hangzhou Dianzi University
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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
    • G06F13/382—Information transfer, e.g. on bus using universal interface adapter
    • G06F13/385—Information transfer, e.g. on bus using universal interface adapter for adaptation of a particular data processing system to different peripheral devices
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B19/00—Programme-control systems
    • G05B19/02—Programme-control systems electric
    • G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
    • G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
    • 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)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • General Engineering & Computer Science (AREA)
  • Power Sources (AREA)
  • Details Of Connecting Devices For Male And Female Coupling (AREA)

Abstract

The invention relates to a multiple-serial-port data transmitting and receiving control circuit based on a STM32 single chip microcomputer. A power supply circuit provides +5Vpower supply input for a level switching circuit, and provides +3.3V power supply input for other circuits; a master control circuit controls a switch and an indicator light in an indicator light circuit to be turned on and off, and an input signal of a toggle switch is received; two universal asynchronous receiver transmitters of the master control circuit are expanded into 10 serial ports through a serial port extension chip in the serial port extension circuit; the TTL (transistor transistor logic) levels of other three universal asynchronous receiver transmitters of the master control circuit and the expansion serial ports are converted into RS232 level through a conversion chip in the level switching circuit to connect with peripheral equipment. The invention uses the STM32 single chip microcomputer to expand a plurality of serial ports and controls the a plurality of serial port data to be transmitted and received, data from different pieces of equipment is transmitted to a far end after the data is preliminarily integrated, and the reliability and the easy maintenance of a monitoring system can be greatly enhanced.

Description

Based on the Multi-serial port data transmit-receive control circuit of STM32 single-chip microcomputer
Technical field
The invention belongs to the technology of serial communication scope based on RS-232 agreement, be specifically related to a kind ofly carry out to 3 of its inside universal synchronous/asynchronism transceiver (USART) interfaces and 10 asynchronism transceiver interfaces being expanded by other 2 UART Universal Asynchronous Receiver Transmitter (UART) circuit that Based Intelligent Control realizes multi-path serial data transmit-receive based on STM32 single-chip microcomputer.
Background technology
RS-232 serial communication is a kind of conventional communication mode, and many digitizers, surveying instrument all have serial line interface.These equipment can be connected with the controller such as PC, PLC easily and carry out exchanges data, thus composition one test detection/monitoring system.
Be arranged on different types of monitoring water environment equipment at the water body scenes such as river, river, lake, sea at present, by gathering water sample, periodically generate one group of data and outwards being transmitted by serial ports.If need at the scene to configure one or more PC, both uneconomical, be difficult to again safeguard.
Summary of the invention
The object of the invention is to design a kind of Multi-serial port data transmit-receive control circuit based on STM32 single-chip microcomputer, controlled the break-make of each serial communication interface by the switch of multichannel, and utilize LED light to show the duty of each interface.Thus the control realized Multi-serial port data transmit-receive.
The present invention includes power-supplying circuit, switch and indicator light circuit, level shifting circuit, serial expanded circuit and governor circuit.
Power-supplying circuit comprises primary power source conversion chip U0, secondary power supply conversion chip U1,2 electrochemical capacitor C0 and C1,2 tantalum electric capacity C2-2 and C2-1, stabilivolt D5, LED 0, ceramic disc capacitor C3, power inductance L1, resistance R2, diode D1 and switch S.1 pin of interface in is connected with one end of switch S, and the other end of switch S is connected with the positive pole of diode D1, and the negative pole of diode D1 is connected with 1 pin of U0; The 2 pin ground connection of interface in.1 pin of primary power source conversion chip U0 is input end, be connected with the positive pole of electrochemical capacitor C0, 2 pin of primary power source conversion chip U0 are output terminal, be connected with the negative electrode of stabilivolt D5 and one end of inductance L 1, 4 pin of primary power source conversion chip U0 are connected with the positive pole of the other end of inductance L 1 and electrochemical capacitor C1, 3 pin of secondary power supply conversion chip U1 are input end, be connected with 4 pin of tantalum electric capacity C2-1 and one-level conversion chip U0, 2 pin of secondary power supply conversion chip U1 are output terminal, with the positive pole of tantalum electric capacity C2-2, one end of ceramic disc capacitor C3 is connected with the anode of LED 0, the negative pole of LED 0 is connected with one end of resistance R2, 3 and 5 pin of primary power source conversion chip U0, 1 pin of secondary power supply conversion chip U1, the anode of stabilivolt D5, the negative pole of electrochemical capacitor C0 and C1, the negative pole of tantalum electric capacity C2-1 and C2-2, the other end of ceramic disc capacitor C3 and the other end ground connection of resistance R2.
Switch and indicator light circuit comprise toggle switch circuit and LED light circuit two parts.Wherein toggle switch circuit comprises 9 toggle switch S1,4 toggle switch S2 and 13 resistance R20 ~ R32.1 pin to the 9 pin ground connection of the toggle switch S1 of 9,10 to 18 pin of toggle switch S1 are connected with one end of resistance R20 to R28 respectively, the other end of resistance R20 to R28 is connected with output terminal 2 pin of the power conversion chip IC2 in power-supplying circuit respectively, 1 pin to the 4 pin ground connection of 4 toggle switch S2,5 pin to 8 pin of toggle switch S2 are connected with one end of resistance R29 to R32 respectively, and the other end of resistance R29 to R32 is connected with output terminal 2 pin of the power conversion chip IC2 in power-supplying circuit respectively.LED light circuit comprises 13 light emitting diodes and 13 resistance.The anode of each light emitting diode is connected with one end of a resistance respectively, and the other end of resistance is connected with output terminal 2 pin of the power conversion chip IC2 in power-supplying circuit.
Level shifting circuit comprises level transferring chip U2, U3, three DB9 female interface USART1, USART2, USART3 and eight ceramic disc capacitors.7 pin of level transferring chip U2 are connected with 2 pin of DB9 female interface USART1, 8 pin of level transferring chip U2 are connected with 3 pin of DB9 female interface USART1, 14 pin of level transferring chip U2 are connected with 2 pin of DB9 female interface USART2, 13 pin of level transferring chip U2 are connected with 3 pin of DB9 female interface USART2, two DB9 female interface USART1, the 5 pin ground connection respectively of USART2 interface, 6 pin of level transferring chip U2 are connected with one end of ceramic disc capacitor C6, the other end of ceramic disc capacitor C6 and 15 pin of level transferring chip U2 are connected to ground, 2 pin of level transferring chip U2 are connected with one end of ceramic disc capacitor C9, the other end of ceramic disc capacitor C9 is connected with 4 pin of primary power source conversion chip U0 in power-supplying circuit with 16 pin of level transferring chip U2.4 pin of level transferring chip U2 are connected with one end of ceramic disc capacitor C7, the other end of ceramic disc capacitor C7 is connected with 5 pin of level transferring chip U2,1 pin of level transferring chip U2 is connected with one end of ceramic disc capacitor C8, and the other end of ceramic disc capacitor C8 is connected with 3 pin of level transferring chip U2.
7 pin of level transferring chip U3 are connected with 2 pin of DB9 female interface USART3, 8 pin of level transferring chip U3 are connected with 3 pin of DB9 female interface USART3, the 5 pin ground connection of DB9 female interface USART3, 6 pin of level transferring chip U3 are connected with one end of ceramic disc capacitor C44, the other end of ceramic disc capacitor C44 and 15 pin of level transferring chip U3 are connected to ground, 2 pin of level transferring chip U3 are connected with one end of ceramic disc capacitor C46, the other end of ceramic disc capacitor C46 is connected with 4 pin of primary power source conversion chip U0 in power-supplying circuit with 16 pin of level transferring chip U3, 4 pin of level transferring chip U3 are connected with one end of ceramic disc capacitor C45, the other end of ceramic disc capacitor C45 is connected with 5 pin of level transferring chip U3, 1 pin of level transferring chip U3 is connected with one end of ceramic disc capacitor C47, the other end of ceramic disc capacitor C47 is connected with 3 pin of level transferring chip U3.
Serial expanded circuit comprises two panels serial port extended chip U10 and U11, five level transferring chip U4, U5, U6, U7 and U8,5 two DB9 female interface COM1-2, COM3-4, COM5-6, COM7-8 and COM9-10, two 12MHz crystal oscillators and 22 ceramic disc capacitors.2 pin of serial port extended chip U10 are connected with one end of one end of crystal oscillator Y1 and ceramic disc capacitor C10, and 3 pin of serial port extended chip U10 are connected with one end of the other end of crystal oscillator Y1 and ceramic disc capacitor C11, and the other end of ceramic disc capacitor C10, C11 is connected to ground respectively.4 pin of serial port extended chip U10 are connected with 10 pin of level transferring chip U4,5 pin of serial port extended chip U10 are connected with 9 pin of level transferring chip U4,11 pin of serial port extended chip U10 are connected with 11 pin of level transferring chip U4, and 12 pin of serial port extended chip U10 are connected with 12 pin of level transferring chip U4; 6 pin of serial port extended chip U10 and 8 pin are connected with 10 pin of level transferring chip U5 and 11 pin respectively, and 7 pin of serial port extended chip U10 and 9 pin are connected with 9 pin of level transferring chip U5 and 12 pin respectively; 13 pin of serial port extended chip U10 are connected with 10 pin of level transferring chip U6 in level shifting circuit, and 19 pin of serial port extended chip U10 are connected with 9 pin of level transferring chip U6; 10 pin, 20 pin of serial port extended chip U10 are connected with output terminal 2 pin of the power conversion chip U1 in power-supplying circuit with 28 pin, 1 pin of serial port extended chip U10 and 14 pin ground connection.
4 pin of serial port extended chip U11 are connected with 11 pin of level transferring chip U6,5 pin of serial port extended chip U11 are connected with 12 pin of level transferring chip U6,11 pin of serial port extended chip U11 are connected with 10 pin of level transferring chip U7, and 12 pin of serial port extended chip U11 are connected with 9 pin of level transferring chip U7; 6 pin of serial port extended chip U11 are connected with 11 pin of level transferring chip U7, and 8 pin of serial port extended chip U11 and 13 pin are connected with 10 pin of level transferring chip U8 and 11 pin respectively; 9 pin of serial port extended chip U11 and 19 pin are connected with 9 pin of level transferring chip U8 and 12 pin respectively; 10 pin, 20 pin of serial port extended chip U11 are connected with output terminal 2 pin of the power conversion chip U1 in power-supplying circuit with 28 pin, 1 pin of serial port extended chip U11 and 14 pin ground connection.
6 pin of level transferring chip U4 are connected with one end of ceramic disc capacitor C12, the other end of ceramic disc capacitor C12 and 15 pin of level transferring chip U4 are connected to ground, 2 pin of level transferring chip U4 are connected with one end of ceramic disc capacitor C15, the other end of ceramic disc capacitor C15 is connected with 4 pin of primary power source conversion chip U0 in power-supplying circuit with 16 pin of level transferring chip U4, 4 pin of level transferring chip U4 are connected with one end of ceramic disc capacitor C13, the other end of ceramic disc capacitor C13 is connected with 5 pin of level transferring chip U4, 1 pin of level transferring chip U4 is connected with one end of ceramic disc capacitor C14, the other end of ceramic disc capacitor C14 is connected with 3 pin of level transferring chip U4.
6 pin of level transferring chip U5 are connected with one end of ceramic disc capacitor C18, the other end of ceramic disc capacitor C18 and 15 pin of level transferring chip U5 are connected to ground, 2 pin of level transferring chip U5 are connected with one end of ceramic disc capacitor C21, the other end of ceramic disc capacitor C21 is connected with 4 pin of primary power source conversion chip U0 in power-supplying circuit with 16 pin of level transferring chip U5, 4 pin of level transferring chip U5 are connected with one end of ceramic disc capacitor C19, the other end of ceramic disc capacitor C19 is connected with 5 pin of level transferring chip U5, 1 pin of level transferring chip U5 is connected with one end of ceramic disc capacitor C20, the other end of ceramic disc capacitor C20 is connected with 3 pin of level transferring chip U5.
6 pin of level transferring chip U6 are connected with one end of ceramic disc capacitor C22, the other end of ceramic disc capacitor C22 and 15 pin of level transferring chip U6 are connected to ground, 2 pin of level transferring chip U6 are connected with one end of ceramic disc capacitor C25, the other end of ceramic disc capacitor C25 is connected with 4 pin of primary power source conversion chip U0 in power-supplying circuit with 16 pin of level transferring chip U6, 4 pin of level transferring chip U6 are connected with one end of ceramic disc capacitor C23, the other end of ceramic disc capacitor C23 is connected with 5 pin of level transferring chip U6, 1 pin of level transferring chip U6 is connected with one end of ceramic disc capacitor C24, the other end of ceramic disc capacitor C24 is connected with 3 pin of level transferring chip U6.
6 pin of level transferring chip U7 are connected with one end of ceramic disc capacitor C31, the other end of ceramic disc capacitor C31 and 15 pin of level transferring chip U7 are connected to ground, 2 pin of level transferring chip U7 are connected with one end of ceramic disc capacitor C34, the other end of ceramic disc capacitor C34 is connected with 4 pin of primary power source conversion chip U0 in power-supplying circuit with 16 pin of level transferring chip U7, 4 pin of level transferring chip U7 are connected with one end of ceramic disc capacitor C32, the other end of ceramic disc capacitor C32 is connected with 5 pin of level transferring chip U7, 1 pin of level transferring chip U7 is connected with one end of ceramic disc capacitor C33, the other end of ceramic disc capacitor C33 is connected with 3 pin of level transferring chip U7.
6 pin of level transferring chip U8 are connected with one end of ceramic disc capacitor C40, the other end of ceramic disc capacitor C40 and 15 pin of level transferring chip U8 are connected to ground, 2 pin of level transferring chip U8 are connected with one end of ceramic disc capacitor C43, the other end of ceramic disc capacitor C43 is connected with 4 pin of primary power source conversion chip U0 in power-supplying circuit with 16 pin of level transferring chip U8, 4 pin of level transferring chip U8 are connected with one end of ceramic disc capacitor C41, the other end of ceramic disc capacitor C41 is connected with 5 pin of level transferring chip U8, 1 pin of level transferring chip U8 is connected with one end of ceramic disc capacitor C42, the other end of ceramic disc capacitor C42 is connected with 3 pin of level transferring chip U8.
7 pin of level transferring chip U4 are connected with 2 pin of two DB9 female interface COM1-2,8 pin of level transferring chip U4 are connected with 3 pin of two DB9 female interface COM1-2,13 pin of level transferring chip U4 are connected with 12 pin of two DB9 female interface COM1-2,14 pin of level transferring chip U4 are connected with 11 pin of two DB9 female interface COM1-2, and 5 pin and 14 pin of two DB9 female interface COM1-2 are connected to ground respectively.
7 pin of level transferring chip U5 are connected with 2 pin of two DB9 female interface COM3-4,8 pin of level transferring chip U5 are connected with 3 pin of two DB9 female interface COM3-4,13 pin of level transferring chip U5 are connected with 12 pin of two DB9 female interface COM3-4,14 pin of level transferring chip U5 are connected with 11 pin of two DB9 female interface COM3-4, and 5 pin and 14 pin of two DB9 female interface COM3-4 are connected to ground respectively.
7 pin of level transferring chip U6 are connected with 2 pin of two DB9 female interface COM5-6,8 pin of level transferring chip U6 are connected with 3 pin of two DB9 female interface COM5-6,13 pin of level transferring chip U6 are connected with 12 pin of two DB9 female interface COM5-6,14 pin of level transferring chip U6 are connected with 11 pin of two DB9 female interface COM5-6, and 5 pin and 14 pin of two DB9 female interface COM5-6 are connected to ground respectively.
7 pin of level transferring chip U7 are connected with 2 pin of two DB9 female interface COM7-8,8 pin of level transferring chip U7 are connected with 3 pin of two DB9 female interface COM7-8,13 pin of level transferring chip U7 are connected with 12 pin of two DB9 female interface COM7-8,14 pin of level transferring chip U7 are connected with 11 pin of two DB9 female interface COM7-8, and 5 pin and 14 pin of two DB9 female interface COM7-8 are connected to ground respectively.
7 pin of level transferring chip U8 are connected with 2 pin of two DB9 female interface COM9-10,8 pin of level transferring chip U8 are connected with 3 pin of two DB9 female interface COM9-10,13 pin of level transferring chip U8 are connected with 12 pin of two DB9 female interface COM9-10,14 pin of level transferring chip U8 are connected with 11 pin of two DB9 female interface COM9-10, and 5 pin and 14 pin of two DB9 female interface COM9-10 are connected to ground respectively.
Governor circuit mainly comprises main control chip U9 and download program and debugging interface JTAG.
10 pin of main control chip U9,19 pin, 20 pin, 27 pin, 49 pin, 74 pin, 94 pin and 99 pin ground connection, 11 pin, 21 pin, 22 pin, 28 pin, 50 pin, 75 pin are connected with output terminal 2 pin of 100 pin with the secondary power supply conversion chip U1 of power-supplying circuit, one end of ceramic disc capacitor C26 is connected with 11 pin of main control chip IC5, one end of ceramic disc capacitor C27 is connected with 28 pin of main control chip U9, one end of ceramic disc capacitor C28 is connected with 50 pin of main control chip U9, one end of ceramic disc capacitor C29 is connected with 75 pin of main control chip U9, one end of ceramic disc capacitor C30 is connected with 100 pin of main control chip U9, one end of ceramic disc capacitor C35 is connected with 21 pin of main control chip U9, one end of ceramic disc capacitor C36 is connected with 22 pin of main control chip U9, the other end ground connection respectively of ceramic disc capacitor C26, C27, C28, C29, C30, C35 and C36, 37 pin of main control chip U9 are connected with one end of resistance R4, the other end ground connection of resistance R4, 6 pin of main control chip U9 are connected with the negative electrode of one end of ceramic disc capacitor C37, diode D2 and the negative electrode of diode D3, the other end ground connection of ceramic disc capacitor C37, the anode of diode D2 is connected with output terminal 2 pin of the secondary power supply conversion chip U1 of power-supplying circuit, and the anode of diode D3 is connected with the positive pole of reserve battery, 12 pin of main control chip U9 are connected with one end of one end of crystal oscillator Y3 and ceramic disc capacitor C38, and 13 pin are connected with the other end of crystal oscillator Y3 and one end of ceramic disc capacitor C39, the other end ground connection respectively of ceramic disc capacitor C38 and C39, 14 pin of main control chip U9 are connected with one end of one end of resistance R1 and ceramic disc capacitor C5, the other end ground connection of ceramic disc capacitor C5, and the other end of resistance R1 is connected with output terminal 2 pin of the secondary power supply conversion chip IC2 of power-supplying circuit, 68 pin of main control chip U9 are connected with 10 pin of the level transferring chip U2 in level shifting circuit, 69 pin are connected with 9 pin of the level transferring chip U2 in level shifting circuit, 25 pin are connected with 11 pin of the level transferring chip U2 in level shifting circuit, and 26 pin are connected with 12 pin of the level transferring chip U2 in level shifting circuit, 47 pin of main control chip U9 are connected with 10 pin of the level transferring chip IU3 in level shifting circuit, and 48 pin are connected with 9 pin of the level transferring chip U2 in level shifting circuit, 30 pin of main control chip U9 are connected with 7 pin of the toggle switch S2 in switch and indicator light circuit, 31 pin are connected with 6 pin of the toggle switch S2 in switch and indicator light circuit, 32 pin are connected with 5 pin of the toggle switch S2 in switch and indicator light circuit, and 51 pin are connected with 8 pin of the toggle switch S2 in switch and indicator light circuit, 35 pin of main control chip U9 are connected with 18 pin of the toggle switch S1 in switch and indicator light circuit, 36 pin are connected with 17 pin of the toggle switch S1 in switch and indicator light circuit, 39 pin are connected with 16 pin of the toggle switch S1 in switch and indicator light circuit, 90 pin are connected with 15 pin of the toggle switch S1 in switch and indicator light circuit, 91 pin are connected with 14 pin of the toggle switch S1 in switch and indicator light circuit, 92 pin are connected with 13 pin of the toggle switch S1 in switch and indicator light circuit, 93 pin are connected with 12 pin of the toggle switch S1 in switch and indicator light circuit, 95 pin are connected with 11 pin of the toggle switch S1 in switch and indicator light circuit, 96 pin are connected with 10 pin of the toggle switch S1 in switch and indicator light circuit, 15 pin of main control chip U9 are connected with the negative electrode of the light emitting diode serial ports 1 in switch and indicator light circuit, 16 pin are connected with the negative electrode of the light emitting diode serial ports 2 in switch and indicator light circuit, 17 pin are connected with the negative electrode of the light emitting diode serial ports 3 in switch and indicator light circuit, 18 pin are connected with the negative electrode of the light emitting diode serial ports 4 in switch and indicator light circuit, 33 pin are connected with the negative electrode of the light emitting diode serial ports 5 in switch and indicator light circuit, 34 pin are connected with the negative electrode of the light emitting diode serial ports 6 in switch and indicator light circuit, 63 pin are connected with the negative electrode of the light emitting diode serial ports 7 in switch and indicator light circuit, 64 pin are connected with the negative electrode of the light emitting diode serial ports 8 in switch and indicator light circuit, 65 pin are connected with the negative electrode of the light emitting diode serial ports 9 in switch and indicator light circuit, 66 pin are connected with the negative electrode of the light emitting diode serial ports 10 in switch and indicator light circuit, 97 pin are connected with the negative electrode of the LED 1 in switch and indicator light circuit, 98 pin are connected with the negative electrode of the LED 2 in switch and indicator light circuit, 1 pin is connected with the negative electrode of the LED 3 in switch and indicator light circuit, 88 pin of main control chip U9 are connected with 18 pin of serial port extended chip U10 and U11 of two in serial expanded circuit, and 54 pin are connected with 27 pin of serial port extended chip U10 and U11 in two serial expanded circuits, 55 pin of main control chip IC5 are connected with 26 pin of the serial port extended chip U10 in serial expanded circuit, 56 pin are connected with 25 pin of the serial port extended chip U10 in serial expanded circuit, 57 pin are connected with 24 pin of the serial port extended chip U10 in serial expanded circuit, 58 pin are connected with 23 pin of the serial port extended chip U10 in serial expanded circuit, 59 pin are connected with 22 pin of the serial port extended chip U10 in serial expanded circuit, and 60 pin are connected with 21 pin of the serial port extended chip U10 in serial expanded circuit, 38 pin of main control chip U9 are connected with 26 pin of the serial port extended chip U11 in serial expanded circuit, 39 pin are connected with 25 pin of the serial port extended chip U11 in serial expanded circuit, 40 pin are connected with 24 pin of the serial port extended chip U11 in serial expanded circuit, 41 pin are connected with 23 pin of the serial port extended chip U11 in serial expanded circuit, 42 pin are connected with 22 pin of the serial port extended chip U11 in serial expanded circuit, and 43 pin are connected with 21 pin of the serial port extended chip U11 in serial expanded circuit, 78 pin of main control chip U9 are connected with 17 pin of the serial port extended chip U10 in serial expanded circuit, and 79 pin are connected with 16 pin of the serial port extended chip U10 in serial expanded circuit, 80 pin of main control chip U9 are connected with 17 pin of the serial port extended chip U11 in serial expanded circuit, and 83 pin are connected with 16 pin of the serial port extended chip U11 in serial expanded circuit.
Download program is connected with output terminal 2 pin of 4 pin of debugging interface JTAG with the secondary power supply conversion chip IC2 in power-supplying circuit, and 3 pin are connected with 72 pin of main control chip IC5, and 2 pin are connected with 76 pin of main control chip IC5,1 pin ground connection.
Described primary power source conversion chip U0 adopts the LM2576 of NI company; Secondary power supply conversion chip U1 adopts the AMS1117 of AMS company; Level transferring chip U2, U3, U4, U5, U6, U7 and U8 adopt the AD202E of AD company; Serial port extended chip U10 and U11 adopts the extended chip GM8125 of 1 expansion 5; Main control chip U9 adopts the STM32F103VCT6 of ST company.
The present invention uses the multiple serial ports of STM32 single-chip microcomputer extension and controls multiple serial data transmitting-receiving, Multi-serial port data transmit-receive control circuit one side based on STM32 single-chip microcomputer can replace computing machine and be installed on monitoring field, transmit to the central control room away from scene after the data coming from distinct device tentatively being integrated, then the reliability of monitoring system, ease for maintenance all greatly strengthen again.Also can simulate multiple sensor device interface sends a large amount of data to multichannel data storer simultaneously on the other hand, detects the reliability and stability of this multichannel data storer with this.
Accompanying drawing explanation
Fig. 1 is integrated circuit schematic diagram of the present invention;
Fig. 2 is the power-supplying circuit schematic diagram in Fig. 1;
Fig. 3 is switch in Fig. 1 and indicator light circuit schematic diagram;
Fig. 4 is the level shifting circuit schematic diagram in Fig. 1;
Fig. 5 a is the serial expanded circuit part schematic diagram in Fig. 1;
Fig. 5 b is the serial expanded circuit another part schematic diagram in Fig. 1;
Fig. 6 is the governor circuit schematic diagram in Fig. 1.
Embodiment
The present embodiment comprises power-supplying circuit 1, switch and indicator light circuit 2, level shifting circuit 3, serial expanded circuit 4 and governor circuit 5.
As shown in Figure 1, power-supplying circuit 1 provides the power supply of+5V to input, for switch and indicator light circuit 2, serial expanded circuit 4 and governor circuit 5 provide the power supply of+3.3V to input for level shifting circuit 3.The light on and off of pilot lamp in governor circuit 5 gauge tap and indicator light circuit 2, and accept the input signal of toggle switch.The serial port extended chip of UART4 and UART5 in 2 serial expanded circuits 4 of governor circuit 5 expands to 10 serial ports.The conversion chip of Transistor-Transistor Logic level in level shifting circuit 3 of 10 serial ports of USART1, USART2 of governor circuit 5 and USART3 and expansion is converted to RS232 level and is connected with peripherals.
As shown in Figure 2, power-supplying circuit comprises primary power source conversion chip U0, secondary power supply conversion chip U1,2 electrochemical capacitor C0 and C1,2 tantalum electric capacity C2-2 and C2-1, stabilivolt D5, LED 0, ceramic disc capacitor C3, power inductance L1, resistance R2, diode D1 and switch S.1 pin of interface in is connected with one end of switch S, and the other end of switch S is connected with the positive pole of diode D1, and the negative pole of diode D1 is connected with 1 pin of U0; The 2 pin ground connection of interface in.1 pin of primary power source conversion chip U0 is input end, be connected with the positive pole of electrochemical capacitor C0, 2 pin of primary power source conversion chip U0 are output terminal, be connected with the negative electrode of stabilivolt D5 and one end of inductance L 1, 4 pin of primary power source conversion chip U0 are connected with the positive pole of the other end of inductance L 1 and electrochemical capacitor C1, 3 pin of secondary power supply conversion chip U1 are input end, be connected with 4 pin of tantalum electric capacity C2-1 and one-level conversion chip U0, 2 pin of secondary power supply conversion chip U1 are output terminal, with the positive pole of tantalum electric capacity C2-2, one end of ceramic disc capacitor C3 is connected with the anode of LED 0, the negative pole of LED 0 is connected with one end of resistance R2, 3 and 5 pin of primary power source conversion chip U0, 1 pin of secondary power supply conversion chip U1, the anode of stabilivolt D5, the negative pole of electrochemical capacitor C0 and C1, the negative pole of tantalum electric capacity C2-1 and C2-2, the other end of ceramic disc capacitor C3 and the other end ground connection of resistance R2.
As shown in Figure 3, switch and indicator light circuit comprise toggle switch circuit and LED light circuit two parts.Wherein toggle switch circuit comprises 9 toggle switch S1,4 toggle switch S2 and 13 resistance R20 ~ R32.1 pin to the 9 pin ground connection of the toggle switch S1 of 9,10 to 18 pin of toggle switch S1 are connected with one end of resistance R20 to R28 respectively, the other end of resistance R20 to R28 is connected with output terminal 2 pin of the power conversion chip IC2 in power-supplying circuit respectively, 1 pin to the 4 pin ground connection of 4 toggle switch S2,5 pin to 8 pin of toggle switch S2 are connected with one end of resistance R29 to R32 respectively, and the other end of resistance R29 to R32 is connected with output terminal 2 pin of the power conversion chip IC2 in power-supplying circuit respectively.LED light circuit comprises 13 light emitting diodes and 13 resistance.The anode of each light emitting diode is connected with one end of a resistance respectively, and the other end of resistance is connected with output terminal 2 pin of the power conversion chip IC2 in power-supplying circuit.
As shown in Figure 4, level shifting circuit comprises level transferring chip U2, U3, three DB9 female interface USART1, USART2, USART3 and eight ceramic disc capacitors.7 pin of level transferring chip U2 are connected with 2 pin of DB9 female interface USART1, 8 pin of level transferring chip U2 are connected with 3 pin of DB9 female interface USART1, 14 pin of level transferring chip U2 are connected with 2 pin of DB9 female interface USART2, 13 pin of level transferring chip U2 are connected with 3 pin of DB9 female interface USART2, two DB9 female interface USART1, the 5 pin ground connection respectively of USART2 interface, 6 pin of level transferring chip U2 are connected with one end of ceramic disc capacitor C6, the other end of ceramic disc capacitor C6 and 15 pin of level transferring chip U2 are connected to ground, 2 pin of level transferring chip U2 are connected with one end of ceramic disc capacitor C9, the other end of ceramic disc capacitor C9 is connected with 4 pin of primary power source conversion chip U0 in power-supplying circuit with 16 pin of level transferring chip U2.4 pin of level transferring chip U2 are connected with one end of ceramic disc capacitor C7, the other end of ceramic disc capacitor C7 is connected with 5 pin of level transferring chip U2,1 pin of level transferring chip U2 is connected with one end of ceramic disc capacitor C8, and the other end of ceramic disc capacitor C8 is connected with 3 pin of level transferring chip U2.
7 pin of level transferring chip U3 are connected with 2 pin of DB9 female interface USART3, 8 pin of level transferring chip U3 are connected with 3 pin of DB9 female interface USART3, the 5 pin ground connection of DB9 female interface USART3, 6 pin of level transferring chip U3 are connected with one end of ceramic disc capacitor C44, the other end of ceramic disc capacitor C44 and 15 pin of level transferring chip U3 are connected to ground, 2 pin of level transferring chip U3 are connected with one end of ceramic disc capacitor C46, the other end of ceramic disc capacitor C46 is connected with 4 pin of primary power source conversion chip U0 in power-supplying circuit with 16 pin of level transferring chip U3, 4 pin of level transferring chip U3 are connected with one end of ceramic disc capacitor C45, the other end of ceramic disc capacitor C45 is connected with 5 pin of level transferring chip U3, 1 pin of level transferring chip U3 is connected with one end of ceramic disc capacitor C47, the other end of ceramic disc capacitor C47 is connected with 3 pin of level transferring chip U3.
As shown in figure 5 a and 5b, serial expanded circuit comprises two panels serial port extended chip U10 and U11, five level transferring chip U4, U5, U6, U7 and U8,5 two DB9 female interface COM1-2, COM3-4, COM5-6, COM7-8 and COM9-10, two 12MHz crystal oscillators and 22 ceramic disc capacitors.2 pin of serial port extended chip U10 are connected with one end of one end of crystal oscillator Y1 and ceramic disc capacitor C10, and 3 pin of serial port extended chip U10 are connected with one end of the other end of crystal oscillator Y1 and ceramic disc capacitor C11, and the other end of ceramic disc capacitor C10, C11 is connected to ground respectively.4 pin of serial port extended chip U10 are connected with 10 pin of level transferring chip U4,5 pin of serial port extended chip U10 are connected with 9 pin of level transferring chip U4,11 pin of serial port extended chip U10 are connected with 11 pin of level transferring chip U4, and 12 pin of serial port extended chip U10 are connected with 12 pin of level transferring chip U4; 6 pin of serial port extended chip U10 and 8 pin are connected with 10 pin of level transferring chip U5 and 11 pin respectively, and 7 pin of serial port extended chip U10 and 9 pin are connected with 9 pin of level transferring chip U5 and 12 pin respectively; 13 pin of serial port extended chip U10 are connected with 10 pin of level transferring chip U6 in level shifting circuit, and 19 pin of serial port extended chip U10 are connected with 9 pin of level transferring chip U6; 10 pin, 20 pin of serial port extended chip U10 are connected with output terminal 2 pin of the power conversion chip U1 in power-supplying circuit with 28 pin, 1 pin of serial port extended chip U10 and 14 pin ground connection.
4 pin of serial port extended chip U11 are connected with 11 pin of level transferring chip U6,5 pin of serial port extended chip U11 are connected with 12 pin of level transferring chip U6,11 pin of serial port extended chip U11 are connected with 10 pin of level transferring chip U7, and 12 pin of serial port extended chip U11 are connected with 9 pin of level transferring chip U7; 6 pin of serial port extended chip U11 are connected with 11 pin of level transferring chip U7, and 8 pin of serial port extended chip U11 and 13 pin are connected with 10 pin of level transferring chip U8 and 11 pin respectively; 9 pin of serial port extended chip U11 and 19 pin are connected with 9 pin of level transferring chip U8 and 12 pin respectively; 10 pin, 20 pin of serial port extended chip U11 are connected with output terminal 2 pin of the power conversion chip U1 in power-supplying circuit with 28 pin, 1 pin of serial port extended chip U11 and 14 pin ground connection.
6 pin of level transferring chip U4 are connected with one end of ceramic disc capacitor C12, the other end of ceramic disc capacitor C12 and 15 pin of level transferring chip U4 are connected to ground, 2 pin of level transferring chip U4 are connected with one end of ceramic disc capacitor C15, the other end of ceramic disc capacitor C15 is connected with 4 pin of primary power source conversion chip U0 in power-supplying circuit with 16 pin of level transferring chip U4, 4 pin of level transferring chip U4 are connected with one end of ceramic disc capacitor C13, the other end of ceramic disc capacitor C13 is connected with 5 pin of level transferring chip U4, 1 pin of level transferring chip U4 is connected with one end of ceramic disc capacitor C14, the other end of ceramic disc capacitor C14 is connected with 3 pin of level transferring chip U4.
6 pin of level transferring chip U5 are connected with one end of ceramic disc capacitor C18, the other end of ceramic disc capacitor C18 and 15 pin of level transferring chip U5 are connected to ground, 2 pin of level transferring chip U5 are connected with one end of ceramic disc capacitor C21, the other end of ceramic disc capacitor C21 is connected with 4 pin of primary power source conversion chip U0 in power-supplying circuit with 16 pin of level transferring chip U5, 4 pin of level transferring chip U5 are connected with one end of ceramic disc capacitor C19, the other end of ceramic disc capacitor C19 is connected with 5 pin of level transferring chip U5, 1 pin of level transferring chip U5 is connected with one end of ceramic disc capacitor C20, the other end of ceramic disc capacitor C20 is connected with 3 pin of level transferring chip U5.
6 pin of level transferring chip U6 are connected with one end of ceramic disc capacitor C22, the other end of ceramic disc capacitor C22 and 15 pin of level transferring chip U6 are connected to ground, 2 pin of level transferring chip U6 are connected with one end of ceramic disc capacitor C25, the other end of ceramic disc capacitor C25 is connected with 4 pin of primary power source conversion chip U0 in power-supplying circuit with 16 pin of level transferring chip U6, 4 pin of level transferring chip U6 are connected with one end of ceramic disc capacitor C23, the other end of ceramic disc capacitor C23 is connected with 5 pin of level transferring chip U6, 1 pin of level transferring chip U6 is connected with one end of ceramic disc capacitor C24, the other end of ceramic disc capacitor C24 is connected with 3 pin of level transferring chip U6.
6 pin of level transferring chip U7 are connected with one end of ceramic disc capacitor C31, the other end of ceramic disc capacitor C31 and 15 pin of level transferring chip U7 are connected to ground, 2 pin of level transferring chip U7 are connected with one end of ceramic disc capacitor C34, the other end of ceramic disc capacitor C34 is connected with 4 pin of primary power source conversion chip U0 in power-supplying circuit with 16 pin of level transferring chip U7, 4 pin of level transferring chip U7 are connected with one end of ceramic disc capacitor C32, the other end of ceramic disc capacitor C32 is connected with 5 pin of level transferring chip U7, 1 pin of level transferring chip U7 is connected with one end of ceramic disc capacitor C33, the other end of ceramic disc capacitor C33 is connected with 3 pin of level transferring chip U7.
6 pin of level transferring chip U8 are connected with one end of ceramic disc capacitor C40, the other end of ceramic disc capacitor C40 and 15 pin of level transferring chip U8 are connected to ground, 2 pin of level transferring chip U8 are connected with one end of ceramic disc capacitor C43, the other end of ceramic disc capacitor C43 is connected with 4 pin of primary power source conversion chip U0 in power-supplying circuit with 16 pin of level transferring chip U8, 4 pin of level transferring chip U8 are connected with one end of ceramic disc capacitor C41, the other end of ceramic disc capacitor C41 is connected with 5 pin of level transferring chip U8, 1 pin of level transferring chip U8 is connected with one end of ceramic disc capacitor C42, the other end of ceramic disc capacitor C42 is connected with 3 pin of level transferring chip U8.
7 pin of level transferring chip U4 are connected with 2 pin of two DB9 female interface COM1-2,8 pin of level transferring chip U4 are connected with 3 pin of two DB9 female interface COM1-2,13 pin of level transferring chip U4 are connected with 12 pin of two DB9 female interface COM1-2,14 pin of level transferring chip U4 are connected with 11 pin of two DB9 female interface COM1-2, and 5 pin and 14 pin of two DB9 female interface COM1-2 are connected to ground respectively.
7 pin of level transferring chip U5 are connected with 2 pin of two DB9 female interface COM3-4,8 pin of level transferring chip U5 are connected with 3 pin of two DB9 female interface COM3-4,13 pin of level transferring chip U5 are connected with 12 pin of two DB9 female interface COM3-4,14 pin of level transferring chip U5 are connected with 11 pin of two DB9 female interface COM3-4, and 5 pin and 14 pin of two DB9 female interface COM3-4 are connected to ground respectively.
7 pin of level transferring chip U6 are connected with 2 pin of two DB9 female interface COM5-6,8 pin of level transferring chip U6 are connected with 3 pin of two DB9 female interface COM5-6,13 pin of level transferring chip U6 are connected with 12 pin of two DB9 female interface COM5-6,14 pin of level transferring chip U6 are connected with 11 pin of two DB9 female interface COM5-6, and 5 pin and 14 pin of two DB9 female interface COM5-6 are connected to ground respectively.
7 pin of level transferring chip U7 are connected with 2 pin of two DB9 female interface COM7-8,8 pin of level transferring chip U7 are connected with 3 pin of two DB9 female interface COM7-8,13 pin of level transferring chip U7 are connected with 12 pin of two DB9 female interface COM7-8,14 pin of level transferring chip U7 are connected with 11 pin of two DB9 female interface COM7-8, and 5 pin and 14 pin of two DB9 female interface COM7-8 are connected to ground respectively.
7 pin of level transferring chip U8 are connected with 2 pin of two DB9 female interface COM9-10,8 pin of level transferring chip U8 are connected with 3 pin of two DB9 female interface COM9-10,13 pin of level transferring chip U8 are connected with 12 pin of two DB9 female interface COM9-10,14 pin of level transferring chip U8 are connected with 11 pin of two DB9 female interface COM9-10, and 5 pin and 14 pin of two DB9 female interface COM9-10 are connected to ground respectively.
As shown in Figure 6, governor circuit mainly comprises main control chip U9 and download program and debugging interface JTAG.
10 pin of main control chip U9,19 pin, 20 pin, 27 pin, 49 pin, 74 pin, 94 pin and 99 pin ground connection, 11 pin, 21 pin, 22 pin, 28 pin, 50 pin, 75 pin are connected with output terminal 2 pin of 100 pin with the secondary power supply conversion chip U1 of power-supplying circuit, one end of ceramic disc capacitor C26 is connected with 11 pin of main control chip IC5, one end of ceramic disc capacitor C27 is connected with 28 pin of main control chip U9, one end of ceramic disc capacitor C28 is connected with 50 pin of main control chip U9, one end of ceramic disc capacitor C29 is connected with 75 pin of main control chip U9, one end of ceramic disc capacitor C30 is connected with 100 pin of main control chip U9, one end of ceramic disc capacitor C35 is connected with 21 pin of main control chip U9, one end of ceramic disc capacitor C36 is connected with 22 pin of main control chip U9, the other end ground connection respectively of ceramic disc capacitor C26, C27, C28, C29, C30, C35 and C36, 37 pin of main control chip U9 are connected with one end of resistance R4, the other end ground connection of resistance R4, 6 pin of main control chip U9 are connected with the negative electrode of one end of ceramic disc capacitor C37, diode D2 and the negative electrode of diode D3, the other end ground connection of ceramic disc capacitor C37, the anode of diode D2 is connected with output terminal 2 pin of the secondary power supply conversion chip U1 of power-supplying circuit, and the anode of diode D3 is connected with the positive pole of reserve battery, 12 pin of main control chip U9 are connected with one end of one end of crystal oscillator Y3 and ceramic disc capacitor C38, and 13 pin are connected with the other end of crystal oscillator Y3 and one end of ceramic disc capacitor C39, the other end ground connection respectively of ceramic disc capacitor C38 and C39, 14 pin of main control chip U9 are connected with one end of one end of resistance R1 and ceramic disc capacitor C5, the other end ground connection of ceramic disc capacitor C5, and the other end of resistance R1 is connected with output terminal 2 pin of the secondary power supply conversion chip IC2 of power-supplying circuit, 68 pin of main control chip U9 are connected with 10 pin of the level transferring chip U2 in level shifting circuit, 69 pin are connected with 9 pin of the level transferring chip U2 in level shifting circuit, 25 pin are connected with 11 pin of the level transferring chip U2 in level shifting circuit, and 26 pin are connected with 12 pin of the level transferring chip U2 in level shifting circuit, 47 pin of main control chip U9 are connected with 10 pin of the level transferring chip IU3 in level shifting circuit, and 48 pin are connected with 9 pin of the level transferring chip U2 in level shifting circuit, 30 pin of main control chip U9 are connected with 7 pin of the toggle switch S2 in switch and indicator light circuit, 31 pin are connected with 6 pin of the toggle switch S2 in switch and indicator light circuit, 32 pin are connected with 5 pin of the toggle switch S2 in switch and indicator light circuit, and 51 pin are connected with 8 pin of the toggle switch S2 in switch and indicator light circuit, 35 pin of main control chip U9 are connected with 18 pin of the toggle switch S1 in switch and indicator light circuit, 36 pin are connected with 17 pin of the toggle switch S1 in switch and indicator light circuit, 39 pin are connected with 16 pin of the toggle switch S1 in switch and indicator light circuit, 90 pin are connected with 15 pin of the toggle switch S1 in switch and indicator light circuit, 91 pin are connected with 14 pin of the toggle switch S1 in switch and indicator light circuit, 92 pin are connected with 13 pin of the toggle switch S1 in switch and indicator light circuit, 93 pin are connected with 12 pin of the toggle switch S1 in switch and indicator light circuit, 95 pin are connected with 11 pin of the toggle switch S1 in switch and indicator light circuit, 96 pin are connected with 10 pin of the toggle switch S1 in switch and indicator light circuit, 15 pin of main control chip U9 are connected with the negative electrode of the light emitting diode serial ports 1 in switch and indicator light circuit, 16 pin are connected with the negative electrode of the light emitting diode serial ports 2 in switch and indicator light circuit, 17 pin are connected with the negative electrode of the light emitting diode serial ports 3 in switch and indicator light circuit, 18 pin are connected with the negative electrode of the light emitting diode serial ports 4 in switch and indicator light circuit, 33 pin are connected with the negative electrode of the light emitting diode serial ports 5 in switch and indicator light circuit, 34 pin are connected with the negative electrode of the light emitting diode serial ports 6 in switch and indicator light circuit, 63 pin are connected with the negative electrode of the light emitting diode serial ports 7 in switch and indicator light circuit, 64 pin are connected with the negative electrode of the light emitting diode serial ports 8 in switch and indicator light circuit, 65 pin are connected with the negative electrode of the light emitting diode serial ports 9 in switch and indicator light circuit, 66 pin are connected with the negative electrode of the light emitting diode serial ports 10 in switch and indicator light circuit, 97 pin are connected with the negative electrode of the LED 1 in switch and indicator light circuit, 98 pin are connected with the negative electrode of the LED 2 in switch and indicator light circuit, 1 pin is connected with the negative electrode of the LED 3 in switch and indicator light circuit, 88 pin of main control chip U9 are connected with 18 pin of serial port extended chip U10 and U11 of two in serial expanded circuit, and 54 pin are connected with 27 pin of serial port extended chip U10 and U11 in two serial expanded circuits, 55 pin of main control chip IC5 are connected with 26 pin of the serial port extended chip U10 in serial expanded circuit, 56 pin are connected with 25 pin of the serial port extended chip U10 in serial expanded circuit, 57 pin are connected with 24 pin of the serial port extended chip U10 in serial expanded circuit, 58 pin are connected with 23 pin of the serial port extended chip U10 in serial expanded circuit, 59 pin are connected with 22 pin of the serial port extended chip U10 in serial expanded circuit, and 60 pin are connected with 21 pin of the serial port extended chip U10 in serial expanded circuit, 38 pin of main control chip U9 are connected with 26 pin of the serial port extended chip U11 in serial expanded circuit, 39 pin are connected with 25 pin of the serial port extended chip U11 in serial expanded circuit, 40 pin are connected with 24 pin of the serial port extended chip U11 in serial expanded circuit, 41 pin are connected with 23 pin of the serial port extended chip U11 in serial expanded circuit, 42 pin are connected with 22 pin of the serial port extended chip U11 in serial expanded circuit, and 43 pin are connected with 21 pin of the serial port extended chip U11 in serial expanded circuit, 78 pin of main control chip U9 are connected with 17 pin of the serial port extended chip U10 in serial expanded circuit, and 79 pin are connected with 16 pin of the serial port extended chip U10 in serial expanded circuit, 80 pin of main control chip U9 are connected with 17 pin of the serial port extended chip U11 in serial expanded circuit, and 83 pin are connected with 16 pin of the serial port extended chip U11 in serial expanded circuit.
Download program is connected with output terminal 2 pin of 4 pin of debugging interface JTAG with the secondary power supply conversion chip IC2 in power-supplying circuit, and 3 pin are connected with 72 pin of main control chip IC5, and 2 pin are connected with 76 pin of main control chip IC5,1 pin ground connection.
The present invention is made up of power-supplying circuit, switch and indicator light circuit, level shifting circuit, serial expanded circuit and governor circuit.Wherein power-supplying circuit is mainly other circuit modules of the present invention and provides+5V and+3.3V power supply; Switch and indicator light circuit major function turn on and off PORT COM, and show the port situation of communication by pilot lamp.Its workflow: by the open and close of toggle switch, transmission of signal, to single-chip microcomputer, turns on and off PORT COM with this, and single-chip microcomputer utilizes pilot lamp to show the state of Current communications port simultaneously; Level shifting circuit realizes the level translation function of the communication of STM32 single-chip microcomputer and host computer, and the Transistor-Transistor Logic level of STM32 is converted to the communication that RS232 level realizes single-chip microcomputer and host computer; Serial expanded circuit mainly realizes the expansion of STM32 microcontroller serial port, uses altogether two panels extended chip in circuit, and every sheet extended chip can expand 5 ports; Governor circuit, as control center of the present invention, realizes the transmitting-receiving of communication, the light on and off of pilot lamp and the switch etc. of monitoring communication.
The present invention can connect the dissimilar water quality monitoring equipment of multiple stage simultaneously, the data that on-the-spot reception gathers also are integrated, then only transmitted to control center by a serial line interface, Multi-serial port data transmit-receive control circuit is different from multi-serial-port card, a kind of completely new approach can work alone by divorced from computer, be serial ports of computers expansion, extending.
The present invention is mainly used in needing to utilize the RS-232 of Multi-serial port to carry out in communication environment, particularly in the water body environment monitoring in river, river, lake, sea, this circuit can replace computing machine and be arranged on scene, and the data sent multiple sensor are collected, process and transmitted.This circuit structure is simple, and cost is low, is convenient to safeguard, reliability is strong.Along with China strengthens the dynamics of environmental protection, particularly in the exploitation and protection of marine environment, the range of application of this circuit can be more and more extensive.

Claims (1)

1., based on the Multi-serial port data transmit-receive control circuit of STM32 single-chip microcomputer, comprise power-supplying circuit, switch and indicator light circuit, level shifting circuit, serial expanded circuit and governor circuit, it is characterized in that:
Power-supplying circuit comprises primary power source conversion chip U0, secondary power supply conversion chip U1,2 electrochemical capacitor C0 and C1,2 tantalum electric capacity C2-2 and C2-1, stabilivolt D5, LED 0, ceramic disc capacitor C3, power inductance L1, resistance R2, diode D1 and switch S, 1 pin of interface in is connected with one end of switch S, and the other end of switch S is connected with the positive pole of diode D1, and the negative pole of diode D1 is connected with 1 pin of U0, the 2 pin ground connection of interface in, 1 pin of primary power source conversion chip U0 is input end, be connected with the positive pole of electrochemical capacitor C0, 2 pin of primary power source conversion chip U0 are output terminal, be connected with the negative electrode of stabilivolt D5 and one end of inductance L 1, 4 pin of primary power source conversion chip U0 are connected with the positive pole of the other end of inductance L 1 and electrochemical capacitor C1, 3 pin of secondary power supply conversion chip U1 are input end, be connected with 4 pin of tantalum electric capacity C2-1 and one-level conversion chip U0, 2 pin of secondary power supply conversion chip U1 are output terminal, with the positive pole of tantalum electric capacity C2-2, one end of ceramic disc capacitor C3 is connected with the anode of LED 0, the negative pole of LED 0 is connected with one end of resistance R2, 3 and 5 pin of primary power source conversion chip U0, 1 pin of secondary power supply conversion chip U1, the anode of stabilivolt D5, the negative pole of electrochemical capacitor C0 and C1, the negative pole of tantalum electric capacity C2-1 and C2-2, the other end of ceramic disc capacitor C3 and the other end ground connection of resistance R2,
Switch and indicator light circuit comprise toggle switch circuit and LED light circuit two parts; Wherein toggle switch circuit comprises 9 toggle switch S1,4 toggle switch S2 and 13 resistance R20 ~ R32; 1 pin to the 9 pin ground connection of the toggle switch S1 of 9,10 to 18 pin of toggle switch S1 are connected with one end of resistance R20 to R28 respectively, the other end of resistance R20 to R28 is connected with output terminal 2 pin of the power conversion chip IC2 in power-supplying circuit respectively, 1 pin to the 4 pin ground connection of 4 toggle switch S2,5 pin to 8 pin of toggle switch S2 are connected with one end of resistance R29 to R32 respectively, and the other end of resistance R29 to R32 is connected with output terminal 2 pin of the power conversion chip IC2 in power-supplying circuit respectively; LED light circuit comprises 13 light emitting diodes and 13 resistance; The anode of each light emitting diode is connected with one end of a resistance respectively, and the other end of resistance is connected with output terminal 2 pin of the power conversion chip IC2 in power-supplying circuit;
Level shifting circuit comprises level transferring chip U2, U3, three DB9 female interface USART1, USART2, USART3 and eight ceramic disc capacitors, 7 pin of level transferring chip U2 are connected with 2 pin of DB9 female interface USART1, 8 pin of level transferring chip U2 are connected with 3 pin of DB9 female interface USART1, 14 pin of level transferring chip U2 are connected with 2 pin of DB9 female interface USART2, 13 pin of level transferring chip U2 are connected with 3 pin of DB9 female interface USART2, two DB9 female interface USART1, the 5 pin ground connection respectively of USART2 interface, 6 pin of level transferring chip U2 are connected with one end of ceramic disc capacitor C6, the other end of ceramic disc capacitor C6 and 15 pin of level transferring chip U2 are connected to ground, 2 pin of level transferring chip U2 are connected with one end of ceramic disc capacitor C9, the other end of ceramic disc capacitor C9 is connected with 4 pin of primary power source conversion chip U0 in power-supplying circuit with 16 pin of level transferring chip U2, 4 pin of level transferring chip U2 are connected with one end of ceramic disc capacitor C7, the other end of ceramic disc capacitor C7 is connected with 5 pin of level transferring chip U2,1 pin of level transferring chip U2 is connected with one end of ceramic disc capacitor C8, and the other end of ceramic disc capacitor C8 is connected with 3 pin of level transferring chip U2,
7 pin of level transferring chip U3 are connected with 2 pin of DB9 female interface USART3, 8 pin of level transferring chip U3 are connected with 3 pin of DB9 female interface USART3, the 5 pin ground connection of DB9 female interface USART3, 6 pin of level transferring chip U3 are connected with one end of ceramic disc capacitor C44, the other end of ceramic disc capacitor C44 and 15 pin of level transferring chip U3 are connected to ground, 2 pin of level transferring chip U3 are connected with one end of ceramic disc capacitor C46, the other end of ceramic disc capacitor C46 is connected with 4 pin of primary power source conversion chip U0 in power-supplying circuit with 16 pin of level transferring chip U3, 4 pin of level transferring chip U3 are connected with one end of ceramic disc capacitor C45, the other end of ceramic disc capacitor C45 is connected with 5 pin of level transferring chip U3, 1 pin of level transferring chip U3 is connected with one end of ceramic disc capacitor C47, the other end of ceramic disc capacitor C47 is connected with 3 pin of level transferring chip U3,
Serial expanded circuit comprises two panels serial port extended chip U10 and U11, five level transferring chip U4, U5, U6, U7 and U8,5 two DB9 female interface COM1-2, COM3-4, COM5-6, COM7-8 and COM9-10, two 12MHz crystal oscillators and 22 ceramic disc capacitors; 2 pin of serial port extended chip U10 are connected with one end of one end of crystal oscillator Y1 and ceramic disc capacitor C10, and 3 pin of serial port extended chip U10 are connected with one end of the other end of crystal oscillator Y1 and ceramic disc capacitor C11, and the other end of ceramic disc capacitor C10, C11 is connected to ground respectively; 4 pin of serial port extended chip U10 are connected with 10 pin of level transferring chip U4,5 pin of serial port extended chip U10 are connected with 9 pin of level transferring chip U4,11 pin of serial port extended chip U10 are connected with 11 pin of level transferring chip U4, and 12 pin of serial port extended chip U10 are connected with 12 pin of level transferring chip U4; 6 pin of serial port extended chip U10 and 8 pin are connected with 10 pin of level transferring chip U5 and 11 pin respectively, and 7 pin of serial port extended chip U10 and 9 pin are connected with 9 pin of level transferring chip U5 and 12 pin respectively; 13 pin of serial port extended chip U10 are connected with 10 pin of level transferring chip U6 in level shifting circuit, and 19 pin of serial port extended chip U10 are connected with 9 pin of level transferring chip U6; 10 pin, 20 pin of serial port extended chip U10 are connected with output terminal 2 pin of the power conversion chip U1 in power-supplying circuit with 28 pin, 1 pin of serial port extended chip U10 and 14 pin ground connection;
4 pin of serial port extended chip U11 are connected with 11 pin of level transferring chip U6,5 pin of serial port extended chip U11 are connected with 12 pin of level transferring chip U6,11 pin of serial port extended chip U11 are connected with 10 pin of level transferring chip U7, and 12 pin of serial port extended chip U11 are connected with 9 pin of level transferring chip U7; 6 pin of serial port extended chip U11 are connected with 11 pin of level transferring chip U7, and 8 pin of serial port extended chip U11 and 13 pin are connected with 10 pin of level transferring chip U8 and 11 pin respectively; 9 pin of serial port extended chip U11 and 19 pin are connected with 9 pin of level transferring chip U8 and 12 pin respectively; 10 pin, 20 pin of serial port extended chip U11 are connected with output terminal 2 pin of the power conversion chip U1 in power-supplying circuit with 28 pin, 1 pin of serial port extended chip U11 and 14 pin ground connection;
6 pin of level transferring chip U4 are connected with one end of ceramic disc capacitor C12, the other end of ceramic disc capacitor C12 and 15 pin of level transferring chip U4 are connected to ground, 2 pin of level transferring chip U4 are connected with one end of ceramic disc capacitor C15, the other end of ceramic disc capacitor C15 is connected with 4 pin of primary power source conversion chip U0 in power-supplying circuit with 16 pin of level transferring chip U4, 4 pin of level transferring chip U4 are connected with one end of ceramic disc capacitor C13, the other end of ceramic disc capacitor C13 is connected with 5 pin of level transferring chip U4, 1 pin of level transferring chip U4 is connected with one end of ceramic disc capacitor C14, the other end of ceramic disc capacitor C14 is connected with 3 pin of level transferring chip U4,
6 pin of level transferring chip U5 are connected with one end of ceramic disc capacitor C18, the other end of ceramic disc capacitor C18 and 15 pin of level transferring chip U5 are connected to ground, 2 pin of level transferring chip U5 are connected with one end of ceramic disc capacitor C21, the other end of ceramic disc capacitor C21 is connected with 4 pin of primary power source conversion chip U0 in power-supplying circuit with 16 pin of level transferring chip U5, 4 pin of level transferring chip U5 are connected with one end of ceramic disc capacitor C19, the other end of ceramic disc capacitor C19 is connected with 5 pin of level transferring chip U5, 1 pin of level transferring chip U5 is connected with one end of ceramic disc capacitor C20, the other end of ceramic disc capacitor C20 is connected with 3 pin of level transferring chip U5,
6 pin of level transferring chip U6 are connected with one end of ceramic disc capacitor C22, the other end of ceramic disc capacitor C22 and 15 pin of level transferring chip U6 are connected to ground, 2 pin of level transferring chip U6 are connected with one end of ceramic disc capacitor C25, the other end of ceramic disc capacitor C25 is connected with 4 pin of primary power source conversion chip U0 in power-supplying circuit with 16 pin of level transferring chip U6, 4 pin of level transferring chip U6 are connected with one end of ceramic disc capacitor C23, the other end of ceramic disc capacitor C23 is connected with 5 pin of level transferring chip U6, 1 pin of level transferring chip U6 is connected with one end of ceramic disc capacitor C24, the other end of ceramic disc capacitor C24 is connected with 3 pin of level transferring chip U6,
6 pin of level transferring chip U7 are connected with one end of ceramic disc capacitor C31, the other end of ceramic disc capacitor C31 and 15 pin of level transferring chip U7 are connected to ground, 2 pin of level transferring chip U7 are connected with one end of ceramic disc capacitor C34, the other end of ceramic disc capacitor C34 is connected with 4 pin of primary power source conversion chip U0 in power-supplying circuit with 16 pin of level transferring chip U7, 4 pin of level transferring chip U7 are connected with one end of ceramic disc capacitor C32, the other end of ceramic disc capacitor C32 is connected with 5 pin of level transferring chip U7, 1 pin of level transferring chip U7 is connected with one end of ceramic disc capacitor C33, the other end of ceramic disc capacitor C33 is connected with 3 pin of level transferring chip U7,
6 pin of level transferring chip U8 are connected with one end of ceramic disc capacitor C40, the other end of ceramic disc capacitor C40 and 15 pin of level transferring chip U8 are connected to ground, 2 pin of level transferring chip U8 are connected with one end of ceramic disc capacitor C43, the other end of ceramic disc capacitor C43 is connected with 4 pin of primary power source conversion chip U0 in power-supplying circuit with 16 pin of level transferring chip U8, 4 pin of level transferring chip U8 are connected with one end of ceramic disc capacitor C41, the other end of ceramic disc capacitor C41 is connected with 5 pin of level transferring chip U8, 1 pin of level transferring chip U8 is connected with one end of ceramic disc capacitor C42, the other end of ceramic disc capacitor C42 is connected with 3 pin of level transferring chip U8,
7 pin of level transferring chip U4 are connected with 2 pin of two DB9 female interface COM1-2,8 pin of level transferring chip U4 are connected with 3 pin of two DB9 female interface COM1-2,13 pin of level transferring chip U4 are connected with 12 pin of two DB9 female interface COM1-2,14 pin of level transferring chip U4 are connected with 11 pin of two DB9 female interface COM1-2, and 5 pin and 14 pin of two DB9 female interface COM1-2 are connected to ground respectively;
7 pin of level transferring chip U5 are connected with 2 pin of two DB9 female interface COM3-4,8 pin of level transferring chip U5 are connected with 3 pin of two DB9 female interface COM3-4,13 pin of level transferring chip U5 are connected with 12 pin of two DB9 female interface COM3-4,14 pin of level transferring chip U5 are connected with 11 pin of two DB9 female interface COM3-4, and 5 pin and 14 pin of two DB9 female interface COM3-4 are connected to ground respectively;
7 pin of level transferring chip U6 are connected with 2 pin of two DB9 female interface COM5-6,8 pin of level transferring chip U6 are connected with 3 pin of two DB9 female interface COM5-6,13 pin of level transferring chip U6 are connected with 12 pin of two DB9 female interface COM5-6,14 pin of level transferring chip U6 are connected with 11 pin of two DB9 female interface COM5-6, and 5 pin and 14 pin of two DB9 female interface COM5-6 are connected to ground respectively;
7 pin of level transferring chip U7 are connected with 2 pin of two DB9 female interface COM7-8,8 pin of level transferring chip U7 are connected with 3 pin of two DB9 female interface COM7-8,13 pin of level transferring chip U7 are connected with 12 pin of two DB9 female interface COM7-8,14 pin of level transferring chip U7 are connected with 11 pin of two DB9 female interface COM7-8, and 5 pin and 14 pin of two DB9 female interface COM7-8 are connected to ground respectively;
7 pin of level transferring chip U8 are connected with 2 pin of two DB9 female interface COM9-10,8 pin of level transferring chip U8 are connected with 3 pin of two DB9 female interface COM9-10,13 pin of level transferring chip U8 are connected with 12 pin of two DB9 female interface COM9-10,14 pin of level transferring chip U8 are connected with 11 pin of two DB9 female interface COM9-10, and 5 pin and 14 pin of two DB9 female interface COM9-10 are connected to ground respectively;
Governor circuit mainly comprises main control chip U9 and download program and debugging interface JTAG;
10 pin of main control chip U9,19 pin, 20 pin, 27 pin, 49 pin, 74 pin, 94 pin and 99 pin ground connection, 11 pin, 21 pin, 22 pin, 28 pin, 50 pin, 75 pin are connected with output terminal 2 pin of 100 pin with the secondary power supply conversion chip U1 of power-supplying circuit, one end of ceramic disc capacitor C26 is connected with 11 pin of main control chip IC5, one end of ceramic disc capacitor C27 is connected with 28 pin of main control chip U9, one end of ceramic disc capacitor C28 is connected with 50 pin of main control chip U9, one end of ceramic disc capacitor C29 is connected with 75 pin of main control chip U9, one end of ceramic disc capacitor C30 is connected with 100 pin of main control chip U9, one end of ceramic disc capacitor C35 is connected with 21 pin of main control chip U9, one end of ceramic disc capacitor C36 is connected with 22 pin of main control chip U9, the other end ground connection respectively of ceramic disc capacitor C26, C27, C28, C29, C30, C35 and C36, 37 pin of main control chip U9 are connected with one end of resistance R4, the other end ground connection of resistance R4, 6 pin of main control chip U9 are connected with the negative electrode of one end of ceramic disc capacitor C37, diode D2 and the negative electrode of diode D3, the other end ground connection of ceramic disc capacitor C37, the anode of diode D2 is connected with output terminal 2 pin of the secondary power supply conversion chip U1 of power-supplying circuit, and the anode of diode D3 is connected with the positive pole of reserve battery, 12 pin of main control chip U9 are connected with one end of one end of crystal oscillator Y3 and ceramic disc capacitor C38, and 13 pin are connected with the other end of crystal oscillator Y3 and one end of ceramic disc capacitor C39, the other end ground connection respectively of ceramic disc capacitor C38 and C39, 14 pin of main control chip U9 are connected with one end of one end of resistance R1 and ceramic disc capacitor C5, the other end ground connection of ceramic disc capacitor C5, and the other end of resistance R1 is connected with output terminal 2 pin of the secondary power supply conversion chip IC2 of power-supplying circuit, 68 pin of main control chip U9 are connected with 10 pin of the level transferring chip U2 in level shifting circuit, 69 pin are connected with 9 pin of the level transferring chip U2 in level shifting circuit, 25 pin are connected with 11 pin of the level transferring chip U2 in level shifting circuit, and 26 pin are connected with 12 pin of the level transferring chip U2 in level shifting circuit, 47 pin of main control chip U9 are connected with 10 pin of the level transferring chip IU3 in level shifting circuit, and 48 pin are connected with 9 pin of the level transferring chip U2 in level shifting circuit, 30 pin of main control chip U9 are connected with 7 pin of the toggle switch S2 in switch and indicator light circuit, 31 pin are connected with 6 pin of the toggle switch S2 in switch and indicator light circuit, 32 pin are connected with 5 pin of the toggle switch S2 in switch and indicator light circuit, and 51 pin are connected with 8 pin of the toggle switch S2 in switch and indicator light circuit, 35 pin of main control chip U9 are connected with 18 pin of the toggle switch S1 in switch and indicator light circuit, 36 pin are connected with 17 pin of the toggle switch S1 in switch and indicator light circuit, 39 pin are connected with 16 pin of the toggle switch S1 in switch and indicator light circuit, 90 pin are connected with 15 pin of the toggle switch S1 in switch and indicator light circuit, 91 pin are connected with 14 pin of the toggle switch S1 in switch and indicator light circuit, 92 pin are connected with 13 pin of the toggle switch S1 in switch and indicator light circuit, 93 pin are connected with 12 pin of the toggle switch S1 in switch and indicator light circuit, 95 pin are connected with 11 pin of the toggle switch S1 in switch and indicator light circuit, 96 pin are connected with 10 pin of the toggle switch S1 in switch and indicator light circuit, 15 pin of main control chip U9 are connected with the negative electrode of the light emitting diode serial ports 1 in switch and indicator light circuit, 16 pin are connected with the negative electrode of the light emitting diode serial ports 2 in switch and indicator light circuit, 17 pin are connected with the negative electrode of the light emitting diode serial ports 3 in switch and indicator light circuit, 18 pin are connected with the negative electrode of the light emitting diode serial ports 4 in switch and indicator light circuit, 33 pin are connected with the negative electrode of the light emitting diode serial ports 5 in switch and indicator light circuit, 34 pin are connected with the negative electrode of the light emitting diode serial ports 6 in switch and indicator light circuit, 63 pin are connected with the negative electrode of the light emitting diode serial ports 7 in switch and indicator light circuit, 64 pin are connected with the negative electrode of the light emitting diode serial ports 8 in switch and indicator light circuit, 65 pin are connected with the negative electrode of the light emitting diode serial ports 9 in switch and indicator light circuit, 66 pin are connected with the negative electrode of the light emitting diode serial ports 10 in switch and indicator light circuit, 97 pin are connected with the negative electrode of the LED 1 in switch and indicator light circuit, 98 pin are connected with the negative electrode of the LED 2 in switch and indicator light circuit, 1 pin is connected with the negative electrode of the LED 3 in switch and indicator light circuit, 88 pin of main control chip U9 are connected with 18 pin of serial port extended chip U10 and U11 of two in serial expanded circuit, and 54 pin are connected with 27 pin of serial port extended chip U10 and U11 in two serial expanded circuits, 55 pin of main control chip IC5 are connected with 26 pin of the serial port extended chip U10 in serial expanded circuit, 56 pin are connected with 25 pin of the serial port extended chip U10 in serial expanded circuit, 57 pin are connected with 24 pin of the serial port extended chip U10 in serial expanded circuit, 58 pin are connected with 23 pin of the serial port extended chip U10 in serial expanded circuit, 59 pin are connected with 22 pin of the serial port extended chip U10 in serial expanded circuit, and 60 pin are connected with 21 pin of the serial port extended chip U10 in serial expanded circuit, 38 pin of main control chip U9 are connected with 26 pin of the serial port extended chip U11 in serial expanded circuit, 39 pin are connected with 25 pin of the serial port extended chip U11 in serial expanded circuit, 40 pin are connected with 24 pin of the serial port extended chip U11 in serial expanded circuit, 41 pin are connected with 23 pin of the serial port extended chip U11 in serial expanded circuit, 42 pin are connected with 22 pin of the serial port extended chip U11 in serial expanded circuit, and 43 pin are connected with 21 pin of the serial port extended chip U11 in serial expanded circuit, 78 pin of main control chip U9 are connected with 17 pin of the serial port extended chip U10 in serial expanded circuit, and 79 pin are connected with 16 pin of the serial port extended chip U10 in serial expanded circuit, 80 pin of main control chip U9 are connected with 17 pin of the serial port extended chip U11 in serial expanded circuit, and 83 pin are connected with 16 pin of the serial port extended chip U11 in serial expanded circuit,
Download program is connected with output terminal 2 pin of 4 pin of debugging interface JTAG with the secondary power supply conversion chip IC2 in power-supplying circuit, and 3 pin are connected with 72 pin of main control chip IC5, and 2 pin are connected with 76 pin of main control chip IC5,1 pin ground connection;
Described primary power source conversion chip U0 adopts the LM2576 of NI company; Secondary power supply conversion chip U1 adopts the AMS1117 of AMS company; Level transferring chip U2, U3, U4, U5, U6, U7 and U8 adopt the AD202E of AD company; Serial port extended chip U10 and U11 adopts the extended chip GM8125 of 1 expansion 5; Main control chip U9 adopts the STM32F103VCT6 of ST company.
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