WO2022037132A1

WO2022037132A1 - Dual-bus communication and power supply mcu system

Info

Publication number: WO2022037132A1
Application number: PCT/CN2021/092403
Authority: WO
Inventors: 罗绍仪; 丁柱; 颜胜; 罗圣江
Original assignee: 杭州并坚科技有限公司
Priority date: 2020-08-19
Filing date: 2021-05-08
Publication date: 2022-02-24
Also published as: CN111711553A; CN111711553B

Abstract

Disclosed is a dual-bus communication and power supply MCU system, comprising an intermediate control module, a terminal module, and a bus power supply communication circuit. The intermediate control module is communicatively connected to an external device via serial communication. The intermediate control module is communicatively and power connected to the terminal module via a bus power supply communication circuit. The intermediate control module comprises: a first driving circuit module, a first decoding circuit module, and a first MCU module having a serial communication module. The first MCU module is communicatively connected to the external device via the serial communication module and is used for receiving a device instruction of the external device and, at the same time, issuing a control instruction to the external device. The terminal module comprises an RX-TX circuit module, a DC-DC circuit module, an open circuit and short circuit detection module, a second driving circuit module, and a second MCU module. The present invention is characterized by high detection precision and great stability.

Description

A two-bus communication and power supply MCU system

technical field

The invention relates to the technical field of fire protection, in particular to a two-bus communication and power supply MCU system.

Background technique

MCU is called a micro-control unit, also known as a single-chip microcomputer or a single-chip microcomputer. It appropriately reduces the frequency and specifications of the central processing unit, and integrates memory, counter, USB, A/D conversion, UART, PLC, DMA and other peripherals. Interfaces, and even LCD driver circuits are integrated on a single chip to form a chip-level computer, which can be controlled in different combinations for different applications. Such as mobile phones, PC peripherals, remote controls, automotive electronics, industrial stepper motors, robotic arm control, etc., MCU can be seen. In addition, in order to protect people's safe and effective life and work, fire emergency lighting and evacuation indication systems, fire door monitoring systems, fire power monitoring systems, fire electrical fire systems, fire fire alarm systems, and intelligent lighting control systems are used. Widely used in production and life, various fire monitoring systems are controlled by MCU, and the existing equipment runs self-test to realize the detection function, the detection method is very inconvenient, and the detection accuracy is not ideal. With the rapid development of science and technology, the industry's safety requirements for fire monitoring systems are getting higher and higher. Therefore, providing a monitoring and detection control device with high detection accuracy and good stability has become an urgent issue for the industry to solve.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a two-bus communication and power supply MCU system. The invention has the characteristics of high detection precision and good stability.

The technical scheme of the present invention: a two-bus communication and power supply MCU system, comprising an intermediate control module, a terminal module and a bus power communication circuit, the intermediate control module is connected to external equipment through serial communication, and the intermediate control module is connected through a bus The power communication circuit is connected with the terminal module for communication and power supply; the intermediate control module includes a first driving circuit module, a first decoding circuit module and a first MCU module with a serial communication module;

The first MCU module is communicatively connected with the external device through the serial port communication module, and is used for receiving the device command of the external device and simultaneously transmitting the command information to the external device;

The first decoding circuit module is connected between the bus signal terminal of the bus power communication circuit and the decoding input port of the first MCU module, and is used for converting the signal output by the bus power communication circuit into a signal identifiable by the first MCU module;

The first driving circuit module is connected between the bus signal terminal of the bus power communication circuit and the signal sending port of the first MCU module; it is used for driving the bus power communication circuit to send high and low pulse signals to the terminal module;

The terminal module includes an RX-TX circuit module, a DC-DC circuit module, an open-circuit and short-circuit detection module, a second driving circuit module and a second MCU module;

The DC-DC circuit module is connected with the second MCU module, and is used for voltage drop on the terminal module;

The RX-TX circuit module is connected between the bus signal terminal of the bus power communication circuit and the second MCU module, and is used for receiving the high and low pulse signals sent by the bus power communication circuit and decoding, and is controlled by the second MCU module to the bus. The power communication circuit sends a return information signal;

The open-circuit and short-circuit detection module is respectively connected with the second driving circuit module and the second MCU module, and is used for outputting a signal indicating the failure of the second driving circuit module to the second MCU module when an open-circuit or short-circuit fault occurs in the second driving circuit module ;

The second driving circuit module is connected with the second MCU module, and is used for driving and outputting different currents.

In the above-mentioned two-bus communication and power supply MCU system, the first decoding circuit module includes a first fixed resistance R ₁ , a second fixed resistance R ₂ , a third fixed resistance R ₃ , a fourth fixed resistance R ₄ , and a fifth fixed resistance R 4 . Resistor R ₅ , first diode D ₁ , second diode D ₂ and first transistor VT ₁ ; one end of the first fixed resistor R ₁ is connected to the anode of the second diode D ₂ , and the first fixed resistor R 1 is connected to the anode of the second diode D 2 . The cathodes of the _two diodes D2 are connected to the reference voltage _V0 voltage terminal; the other end of the _first fixed resistor R1 is grounded; the cathodes of the _first diodes D1 are connected to the anodes of the _second diodes D2; The anode of a diode D1 is connected to _one end of the _second fixed resistor R2, the other end of the _second fixed resistor R2 is connected to the signal input terminal V _i ; one end of the third fixed resistor _R3 is connected to the signal input terminal V _i is connected, and the other end of the third fixed resistor _R3 is connected to the emitter of the _first transistor VT1, and the base of the _first transistor VT1 is connected to the non-ground terminal of the _first fixed resistor R1; One ends of the _fourth fixed resistor R4 and the _fifth fixed resistor R5 are respectively connected to the collector of the _first transistor VT1, the other end of the _fourth fixed resistor R4 is grounded, and the other end of the _fifth fixed resistor R5 The output terminal CK of the pulse signal terminal is connected.

In the aforementioned two-bus communication and power supply MCU system, the RX-TX circuit module includes a sixth fixed resistor R ₆ , a seventh fixed resistor R ₇ , an eighth fixed resistor R ₈ , a ninth fixed resistor R ₉ , and a tenth fixed resistor R 9 . Resistor R ₁₀ , Zener diode D ₃ , second transistor VT ₂ and third transistor VT ₃ ; one end of the seventh fixed resistor R ₇ , the eighth fixed resistor R ₈ , and the ninth fixed resistor R ₉ Grounding; the emitter of the _third triode VT3 is grounded; the base of the _second triode VT2 is connected to one end of the _sixth fixed resistor R6, and the other end of the _sixth fixed resistor R6 is connected with POUT output terminal, the POUT output terminal is connected to the POUT pin on the second MCU module; the emitter of the _second transistor VT2 is connected to the other end of the seventh fixed resistor _R7 , the second three _The collector of the diode VT2 is respectively connected with the cathode of the zener diode _D3 and the other end of the eighth fixed resistor _R8 , the anode of the zener diode _D3 and the other end of the ninth fixed resistor _R9 are respectively is connected with the base of the _third triode VT3 _; the collector of the third triode VT3 is connected with one end of the _tenth fixed resistor R10, and is connected with the PIN in input end, the PIN in The input end is connected to the PIN in pin on the second MCU module; the other end of the _tenth fixed resistor R10 is connected to the VDD voltage end.

Compared with the prior art, the present invention has the following advantages:

1. The present invention uses the terminal module to issue a detection instruction, the detection instruction is decoded by the RX-TX circuit module, and the decoded detection instruction is transmitted to the intermediate control module through the transmission of the bus power communication circuit, and the intermediate control module passes the first decoding circuit module. The detection instruction is decoded, and the decoded detection instruction is transmitted to the first MCU module. The first MCU module transmits the detection instruction information data to the external device through serial communication. The external device generates an action signal according to the corresponding detection command, and the action signal passes through The serial communication is transmitted to the intermediate control module; then the intermediate control module converts the high and low pulse signals to the terminal module according to the received action signal transmission of the external device, and the RX-TX circuit module in the terminal module responds to the high and low pulses transmitted by the bus power communication circuit. The signal is decoded, and the decoded information data is transmitted to the second MCU module, and the second MCU module obtains the detection result of the external device according to the decoded action signal. In addition, the present invention also makes specific improvements to each circuit, so that the present invention has the characteristics of high detection accuracy and good stability. The invention combines the power supply line and the signal line into one through the bus power communication circuit, realizes the technology of sharing one bus for the signal and the power supply, saves the cost of construction and cables, and brings great benefits to the on-site construction and later maintenance. Convenient, the bus power communication circuit has strong anti-interference ability, no need to isolate the power supply and the signal line, saves the cost of isolation, greatly reduces the cable requirements, and is easier and more reliable for on-site construction wiring, and saves labor and construction costs; Flexible wiring, support star, tree, bus topology, and has the characteristics of long communication distance.

2. The present invention converts the signal output by the bus power communication circuit into a signal identifiable by the first MCU module by setting a specific first decoding circuit module. Compared with the ordinary decoding circuit, the ordinary decoding The circuit amplifies the signal through the ordinary differential, but due to the difference of the IC itself and the influence of temperature, the CK will have a misjudgment, and the first decoding circuit module in the present invention does not cause misjudgment due to the difference of the device, and the stability is strong, so it is extremely stable. Greatly improved detection accuracy.

3. The present invention can send and return codes with small current to the bus power communication circuit by setting a specific RX-TX circuit module.

Description of drawings

Fig. 1 is a system block diagram of the present invention;

2 is a circuit diagram of a first decoding circuit module;

Fig. 3 is the circuit diagram of RX-TX circuit module;

FIG. 4 is a circuit diagram of a terminal module.

1. External equipment; 2. Intermediate control module; 3. Terminal module; 4. Bus power communication circuit; 5. First drive circuit module; 6. First decoding circuit module; 7. Serial communication module; 8. First MCU module; 9. RX-TX circuit module; 10. DC-DC circuit module; 11. Open-circuit and short-circuit detection module; 12. Second driving circuit module; 13. Second MCU module.

detailed description

The present invention will be further described below in conjunction with the accompanying drawings and embodiments, but not as a basis for limiting the present invention.

Embodiment: A two-bus communication and power supply MCU system, as shown in Figures 1-4, includes an intermediate control module 2, a terminal module 3 and a bus power communication circuit 4, and the intermediate control module 2 communicates with the external device 1 through serial port communication. Communication connection, the intermediate control module 2 communicates and supplies power to the terminal module 3 through the bus power communication circuit 4; the intermediate control module 2 includes a first drive circuit module 5, a first decoding circuit module 6 and a serial port communication module the first MCU module 8 of the module 7;

The first MCU module 8 is communicated and connected with the external device 1 through the serial port communication module 7, and is used to receive the device instruction of the external device 1 and transmit the instruction information to the external device 1 at the same time;

The first decoding circuit module 6 is connected between the bus signal terminal of the bus power communication circuit 4 and the decoding input port of the first MCU module 8, and is used to convert the signal output by the bus power communication circuit 4 into the first MCU module 8. identifiable signals;

The first drive circuit module 5 is connected between the bus signal terminal of the bus power communication circuit 4 and the signal sending port of the first MCU module 8; it is used to drive the bus power communication circuit 4 to send high and low pulse signals to the terminal module 3;

The terminal module 3 includes an RX-TX circuit module 9 , a DC-DC circuit module 10 , an open-circuit short-circuit detection module 11 , a second driving circuit module 12 and a second MCU module 13 ; FIG. 4 is a circuit diagram of the terminal module 3 . The circuit a is the LED light source circuit module, the circuit b is the rectifier circuit module, and the circuit c is the step-down circuit module; the 1 pin in the circuit diagram is the PBJ (TX) pin, the 2 pin is the RST pin; the 3 pin is the PBJ (TX) pin. It is PD0 (X1) pin; 4 pin is PD1 (X2) pin; 5 pin is VCAP pin; 6 pin is VSS pin; 7 pin is VDDM pin; 8 pin is PA6 (RX pin) ) pin; 9 pin is VDD pin; 10 pin is FB pin; 11 pin is GND pin; 12 pin is SW pin; 13 pin is VCC1 pin; 14 pin is VCC1 pin 15 pin is Vin pin; 17 pin is LOUT pin; 18 pin is COUT pin; 19 pin is ROUT pin; 20 pin is C&L pin; 21 pin is C&C pin; 22 pins are C&R pins; 23 pins are PBI (ADC9) pins; 24 pins are PA13 (D10) pins; 25 pins are PA14 (SCK) pins; 26 pins are PB3 pins; 27 pins The pin is the PB4 (BT0) pin; the 28 pin is the PB6 (REC) pin; the 29 pin is the PGND pin.

The DC-DC circuit module 10 is connected with the second MCU module 13, and is used for voltage drop on the terminal module 3;

The RX-TX circuit module 9 is connected between the bus signal terminal of the bus power communication circuit 4 and the second MCU module 13, and is used to receive and decode the high and low pulse signals sent by the bus power communication circuit 4. The module 13 controls to send a return information signal to the bus power communication circuit 4;

The open-circuit and short-circuit detection module 11 is respectively connected with the second driving circuit module 12 and the second MCU module 13, and is used for outputting to the second MCU module 13 when an open-circuit or short-circuit fault occurs in the second driving circuit module 12 indicating the second driving circuit The signal of the failure of the module 12 can be uploaded through the software of the loop failure of the second driving circuit module 12 .

The second driving circuit module 12 is connected to the second MCU module 13 for driving and outputting different currents, and the second driving circuit module 12 has a short-circuit and open-circuit protection function.

The present invention uses the terminal module 3 to issue a detection command, the detection command is decoded by the RX-TX circuit module 9, and the decoded information data is transmitted to the intermediate control module 2 through the transmission of the bus power communication circuit 4, and then the intermediate control module 2 passes the first A decoding circuit module 6 decodes the information data sent by the bus power communication circuit 4, and transmits the decoded information data to the first MCU module 8, then the first MCU module 8 transmits the detection instruction information data to the external through serial communication device 1, the external device 1 performs the corresponding device self-test, and transmits the device self-test result data of the external device 1 to the intermediate control module 2 through serial communication; then the intermediate control module 2 receives the device self-test of the external device 1 according to the device self-test For the result data, the first MCU module 8 controls the first drive circuit module 5 to drive the bus power communication circuit 4, and the bus power communication circuit 4 generates the corresponding high and low pulse signals of the device self-test result data to the terminal module 3, then the terminal module 3 The RX-TX circuit module 9 decodes the high and low pulse signals transmitted by the bus power communication circuit 4, and transmits the decoded information data to the second MCU module 13, then the second MCU module 13 according to the decoded information data Know the self-test result of the external device 1. The invention has the characteristics of high integration, high detection precision and good stability. In the present invention, the power supply line and the signal line are combined into one through the bus power communication circuit 4, realizing the technology of sharing one bus for the signal and the power supply, saving construction and cable costs at the same time, and bringing great benefits to on-site construction and later maintenance. The bus power communication circuit has strong anti-interference ability, no need to isolate the power supply and the signal line, saves the cost of isolation, greatly reduces the cable requirements, and is easier and more reliable for on-site construction wiring, and saves labor and construction costs. ; In addition, it can also be flexibly wired, support star, tree, bus topology, can carry out long-distance communication power supply connection, and has the characteristics of long communication distance.

As shown in FIG. 2 , the first decoding circuit module 6 includes a first fixed resistor R ₁ , a second fixed resistor R ₂ , a third fixed resistor R ₃ , a fourth fixed resistor R ₄ , a fifth fixed resistor R ₅ , a first diode D ₁ , a second diode D ₂ and a first transistor VT ₁ ;

_One end of the first fixed resistor R1 is connected to the anode of the _second diode D2, and the cathode of the _second diode D2 is connected to the reference voltage _V0 voltage terminal; the other end of the _first fixed resistor R1 is grounded; the reference The voltage terminal of the voltage V ₀ is connected to the output voltage terminal of the first MCU module 8 .

The cathode of the _first diode D1 is connected to the anode of the _second diode D2, the anode of the _first diode D1 is connected to one end of the _second fixed resistor R2, and the other end of the _second fixed resistor R2 is connected. One end is connected to the signal input end V _i ; wherein the signal input end V _i is connected to the signal end of the bus signal end of the bus power communication circuit 4 .

One end of the third fixed resistor _R3 is connected to the signal input terminal _Vi , the other end of the third fixed resistor _R3 is connected to the emitter of the transistor VT1, and the base of the _first transistor VT1 is connected to the _first transistor VT1. _A non-ground connection of a fixed resistor R1;

One ends of the _fourth fixed resistor R4 and the _fifth fixed resistor R5 are respectively connected to the collector of the _first transistor VT1, the other end of the _fourth fixed resistor R4 is grounded, and the other end of the _fifth fixed resistor R5 The pulse signal terminal output terminal CK is connected, and the pulse signal terminal output terminal CK is connected with the signal input terminal of the first MCU module. When V ₀ is low, CK is high; when V ₀ is high, CK is low. The present invention converts the signal output by the bus power communication circuit into a signal identifiable by the first MCU module by setting a specific first decoding circuit module. Compared with the ordinary decoding circuit, the first decoding circuit module is Amplifying the signal through ordinary differential, but due to the difference of the IC itself and the influence of temperature, CK will be misjudged, and the first decoding circuit module in the present invention does not cause misjudgment due to the difference of the device, and the stability is strong, thereby greatly improving the high detection accuracy.

As shown in FIG. 3 , the RX-TX circuit module 9 includes a sixth fixed resistance R ₆ , a seventh fixed resistance R ₇ , an eighth fixed resistance R ₈ , a ninth fixed resistance R ₉ , a tenth fixed resistance R ₁₀ , Zener diode D ₃ , second transistor VT ₂ and third transistor VT ₃ ; one end of the seventh fixed resistor R ₇ , the eighth fixed resistor R ₈ and the ninth fixed resistor R ₉ is grounded; the The emitter of the _third transistor VT3 is grounded; the base of the _second transistor VT2 is connected to one end of the _sixth fixed resistor R6, and the other end of the _sixth fixed resistor R6 is connected to the POUT output terminal, The POUT output terminal is connected with the POUT pin on the second MCU module 13; the emitter of the _second transistor VT2 is connected with the other end of the seventh fixed resistor _R7 , and the second transistor VT2 is connected to the other end of the seventh fixed resistor R7. The collector of ₂ is respectively connected with the cathode of the zener diode _D3 and the other end of the eighth fixed resistor _R8 , and the anode of the zener diode _D3 and the other end of the ninth fixed resistor _R9 are respectively connected with the The base of the _third triode VT3 is connected; the collector of the _third triode VT3 is connected to one end of the _tenth fixed resistor R10, and is connected to the PIN in input end, and the PINin input end is connected to the first end of the tenth fixed resistor R10. The PIN in pins on the two MCU modules 13 are connected; the other end of the _tenth fixed resistor R10 is connected with the VDD voltage terminal. In the present invention, by setting a specific RX-TX circuit module 9, a small current can be sent and returned to the bus power communication circuit.

Claims

A two-bus communication and power supply MCU system, characterized in that it comprises an intermediate control module (2), a terminal module (3) and a bus power communication circuit (4), wherein the intermediate control module (2) communicates with an external device via a serial port (1) Communication connection, the intermediate control module (2) communicates and supplies power to the terminal module (3) via a bus power communication circuit (4); the intermediate control module (2) includes a first drive circuit module (5) ), a first decoding circuit module (6) and a first MCU module (8) with a serial port communication module (7);

The first MCU module (8) is communicated and connected with the external device (1) via the serial port communication module (7), and is used for receiving the device instruction of the external device (1) and simultaneously transmitting the instruction information to the external device (1);

The first decoding circuit module (6) is connected between the bus signal terminal of the bus power communication circuit (4) and the decoding input port of the first MCU module (8), and is used for the output of the bus power communication circuit (4). The signal is converted into a signal identifiable by the first MCU module (8);

The first driving circuit module (5) is connected between the bus signal terminal of the bus power communication circuit (4) and the signal sending port of the first MCU module (8); it is used for driving the bus power communication circuit (4) to the terminal Module (3) sends out high and low pulse signals;

The terminal module (3) includes an RX-TX circuit module (9), a DC-DC circuit module (10), an open-circuit and short-circuit detection module (11), a second driving circuit module (12) and a second MCU module (13) ;

The DC-DC circuit module (10) is connected with the second MCU module (13), and is used for voltage drop on the terminal module (3);

The RX-TX circuit module (9) is connected between the bus signal terminal of the bus power communication circuit (4) and the second MCU module (13), and is used for receiving the high and low pulse signals sent by the bus power communication circuit (4) to Carrying out code receiving and decoding, and at the same time being controlled by the second MCU module (13) to send a return code information signal to the bus power communication circuit (4);

The open-circuit and short-circuit detection module (11) is respectively connected with the second driving circuit module (12) and the second MCU module (13), and is used for reporting to the second MCU when an open-circuit or short-circuit fault occurs in the second driving circuit module (12). The module (13) outputs a signal indicating that the second drive circuit module (12) is faulty;

The second driving circuit module (12) is connected with the second MCU module (13), and is used for driving and outputting different currents;

The first decoding circuit module (6) includes a first fixed resistor R 1 , a second fixed resistor R 2 , a third fixed resistor R 3 , a fourth fixed resistor R 4 , a fifth fixed resistor R 5 , a first diode tube D 1 , the second diode D 2 and the first transistor VT 1 ;

One end of the first fixed resistor R1 is connected to the anode of the second diode D2, and the cathode of the second diode D2 is connected to the reference voltage V0 voltage terminal; the other end of the first fixed resistor R1 is grounded;

The cathode of the first diode D1 is connected to the anode of the second diode D2, the anode of the first diode D1 is connected to one end of the second fixed resistor R2, and the other end of the second fixed resistor R2 is connected. One end is connected to the signal input terminal V i ;

One end of the third fixed resistor R3 is connected to the signal input terminal Vi , and the other end of the third fixed resistor R3 is connected to the emitter of the first triode VT1, and the first triode VT1 is connected to the emitter. The base is connected to the non-ground terminal of the first fixed resistor R1;

One ends of the fourth fixed resistor R4 and the fifth fixed resistor R5 are respectively connected to the collector of the first transistor VT1, the other end of the fourth fixed resistor R4 is grounded, and the other end of the fifth fixed resistor R5 The output terminal CK of the pulse signal terminal is connected.
The two-bus communication and power supply MCU system according to claim 1, wherein the RX-TX circuit module (9) comprises a sixth fixed resistor R 6 , a seventh fixed resistor R 7 , and an eighth fixed resistor R 8 , a ninth fixed resistor R 9 , a tenth fixed resistor R 10 , a Zener diode D 3 , a second transistor VT 2 and a third transistor VT 3 ;

One ends of the seventh fixed resistor R 7 , the eighth fixed resistor R 8 , and the ninth fixed resistor R 9 are grounded; the emitter of the third transistor VT 3 is grounded;

The base of the second transistor VT2 is connected to one end of the sixth fixed resistor R6, the other end of the sixth fixed resistor R6 is connected to the POUT output terminal, and the POUT output terminal is connected to the second MCU module (13). ) on the POUT pin connection;

The emitter of the second transistor VT2 is connected to the other end of the seventh fixed resistor R7 , and the collector of the second transistor VT2 is respectively the cathode of the zener diode D3 and the eighth fixed resistor. The other end of R 8 is connected;

The anode of the zener diode D3 and the other end of the ninth fixed resistor R9 are respectively connected to the base of the third triode VT3;

The collector of the third triode VT3 is connected with one end of the tenth fixed resistor R10, and is connected with a PIN in input terminal, and the PIN in input terminal is connected with the PIN in pin on the second MCU module (13) ;

The other end of the tenth fixed resistor R10 is connected to the VDD voltage end.