CN217113060U - A control circuit for real-time communication - Google Patents

Abstract

The utility model relates to the technical field of hardware communication control, in particular to a control circuit for real-time communication. , the communication circuit includes: a first interface circuit, which is used to connect the CLK signal, DATD signal, and power supply of the main control circuit, and a second interface circuit, which is used to connect an external HU er signal, a shift register, the shift register is electrically connected to the first interface circuit and the second interface circuit, respectively, the shift register communicates with the main control circuit through the first interface circuit, and the shift register communicates with the main control circuit through the first interface circuit. The second interface circuit detects the Hall signal.

Description

A control circuit for real-time communication

technical field

The utility model relates to the technical field of hardware communication control, in particular to a control circuit for real-time communication.

Background technique

In the prior art, almost all tool products contain a main board (large board) and a communication board (large board), and the two boards are connected by a connecting line; in order to solve the abnormality of the communication line (pressure break or line short circuit, etc.), the large and small boards are conventionally used. A single-chip communication, including serial port or PWM communication; but because of the use of a single-chip, the price of the single-chip is usually high, and the software needs to be written, and there is a big shortage in the real-time performance of the signal.

Utility model content

The purpose of the utility model is to provide a control circuit for real-time communication to overcome the problem of using a single-chip microcomputer, which is usually expensive and needs to write software, and there is also a great lack of real-time signal performance.

In order to achieve the above purpose, the utility model is widely used in the technical scheme of hardware communication control, and especially provides the following technical scheme: a control circuit for real-time communication, comprising;

a main control circuit, the main control circuit is used for outputting the CLK signal, inputting the DATA signal, and providing power to the subordinate circuit;

A communication circuit, the communication circuit includes:

a first interface circuit, the first interface circuit is used to connect the CLK signal, the DATD signal, and the power supply of the main control circuit,

a second interface circuit, the second interface circuit is used to connect an external Hall signal,

a shift register, the shift register is electrically connected to the first interface circuit and the second interface circuit respectively, the shift register communicates with the main control circuit through the first interface circuit, and the shift register communicates with the main control circuit through the second interface The circuit detects the Hall signal;

The encoding circuit is used for expanding the communication circuit, or for judging whether the communication between the shift register and the main control circuit is normal.

Preferably, the main control circuit includes an MCU chip, a resistor R1, a transistor Q1, and a first CON1 interface; the LD port of the MCU chip is electrically connected to the base of the transistor Q1 via the resistor R1, and the collector of the transistor Q1 is connected to an external 5V power supply, the emitter of the transistor Q1 is connected to one end of the first CON1 interface, and the other ports of the first CON1 interface are respectively electrically connected to the CLK signal terminal and the DATD signal terminal of the MCU chip.

Preferably, the first interface circuit includes a second CON1 interface, a diode D1, and an RC filter circuit; the second interface circuit is respectively connected with the corresponding ports of the first CON1 interface in a one-to-one correspondence, and one end of the diode D1 is connected to the first CON1 interface. The corresponding ends of the two CON1 interfaces are connected, the other end of the diode D1 is connected to the RC filter circuit, and one end of the RC filter circuit is connected to the corresponding end of the second CON1 interface.

Preferably, the RC filter circuit includes a circuit composed of a capacitor C1, a capacitor C2, and a resistor R5.

Preferably, the shift register is set as a 74HC165 chip.

Preferably, the second interface circuit is electrically connected to the E pin, the F pin, the G pin and the H pin of the 74HC165 chip, respectively.

Preferably, the encoding circuit is electrically connected to the SET pin, the A pin, the B pin, the D pin and the C pin of the 74HC165 chip, respectively.

Compared with the prior art, the beneficial effects of the present utility model are:

The utility model supplies power to the 74HC165 chip through the transistor Q4, the first CON1 interface and the second CON1 interface when the LD end of the MCU chip is at a low level;

When the MCU chip needs to collect signals, when the LD terminal of the MCU chip is at a high level, that is, when the high level is 2us, the 74HC165 chip collects the Hall signal through the second interface circuit, and collects the collected Hall signal. Input to MCU chip

When coding is possible for the SET pin, A pin, B pin, D pin, and C pin of the 74HC165 chip, when the coding circuit encodes the signal, it is not required to be all 0 or all 1, because the 74HC165 chip and the MCU There is only one data line of the chip. If the signal of this line is high or low, it means that the communication is normal. Using this feature, the main control circuit can detect whether the communication is abnormal;

When the main control circuit requires to connect multiple communication circuits, the encoding circuit can be an address code, which is equivalent to the uniqueness of the lower computer, then the main control circuit can be connected to at least a dozen communication circuits; of course, the encoding signal can also be defined as Therefore, the utility model replaces the single-chip microcomputer through the displacement register, the cost of the circuit is low, and the circuit does not need software writing and programming, and the required signals are collected at the same time. Enhanced beneficial effects.

Description of drawings

Fig. 1 is the main control circuit principle schematic diagram of the present utility model;

FIG. 2 is a schematic diagram of a communication circuit, a shift register and an encoding circuit of the present invention.

Detailed ways

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the implementations. example. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

Please refer to Figure 1 and Figure 2, an embodiment provided by the present invention:

A control circuit for real-time communication, comprising;

a main control circuit 1, the main control circuit 1 is used for outputting the CLK signal, inputting the DATA signal, and providing power to the lower-level circuit;

A communication circuit, the communication circuit includes:

The first interface circuit 2, the first interface circuit 2 is used to connect the CLK signal, the DATD signal and the power supply of the main control circuit 1,

The second interface circuit 3, the second interface circuit 3 is used to connect the external Hall signal,

a shift register, the shift register is electrically connected to the first interface circuit 2 and the second interface circuit 3 respectively, the shift register communicates with the main control circuit 1 through the first interface circuit 2, the shift register The Hall signal is detected by the first interface circuit 2;

The encoding circuit 4 is used for extending the communication circuit, or for judging whether the communication between the shift register and the main control circuit 1 is normal.

Further, the main control circuit 1 includes an MCU chip, a resistor R1, a transistor Q1, and a first CON1 interface; the LD port of the MCU chip is electrically connected to the base of the transistor Q1 through the resistor R1, and the collector of the transistor Q1 is electrically connected. External 5V power supply, the emitter of the transistor Q1 is connected to one end of the first CON1 interface, and the other ports of the first CON1 interface are respectively electrically connected to the CLK signal terminal and the DATD signal terminal of the MCU chip.

Further, the first interface circuit 2 includes a second CON1 interface, a diode D1, and an RC filter circuit; the second interface circuit 3 is respectively connected to the corresponding ports of the first CON1 interface in a one-to-one correspondence, and one end of the diode D1 It is connected to the corresponding end of the second CON1 interface, the other end of the diode D1 is connected to the RC filter circuit, and one end of the RC filter circuit is connected to the corresponding end of the second CON1 interface.

Further, the RC filter circuit includes a circuit composed of a capacitor C1, a capacitor C2, and a resistor R5.

Further, the shift register is set as a 74HC165 chip.

Further, the second interface circuit 3 is electrically connected to the E pin, the F pin, the G pin and the H pin of the 74HC165 chip, respectively.

Further, the encoding circuit 4 is electrically connected to the SET pin, A pin, B pin, D pin, and C pin of the 74HC165 chip, respectively.

The working principle of the present utility model is as follows:

When the LD terminal of the MCU chip is at a low level, power is supplied to the 74HC165 chip through the transistor Q4, the first CON1 interface, and the second CON1 interface;

When the MCU chip needs to collect signals, when the LD terminal of the MCU chip is at a high level, that is, when the high level is 2us, the 74HC165 chip collects the Hall signal through the second interface circuit, and collects the collected Hall signal. Input to MCU chip

When coding is possible for the SET pin, A pin, B pin, D pin, and C pin of the 74HC165 chip, when the coding circuit encodes the signal, it is not required to be all 0 or all 1, because the 74HC165 chip and the MCU There is only one data line of the chip. If the signal of this line is high or low, it means that the communication is normal. Using this feature, the main control circuit 1 can detect whether the communication is abnormal;

When the main control circuit 1 needs to connect multiple communication circuits, the encoding circuit can be an address code, which is equivalent to the uniqueness of the lower computer, then the main control circuit 1 can be connected to at least a dozen communication circuits; of course, this encoding signal can also be used. Defined as product number, etc.

It will be apparent to those skilled in the art that the present invention is not limited to the details of the above-described exemplary embodiments, and that the present invention may be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments are to be considered in all respects as exemplary and not restrictive, and the scope of the present invention is defined by the appended claims rather than the foregoing description, and it is therefore intended that the All changes within the meaning and range of the required equivalents are embraced within the present invention. Any reference signs in the claims shall not be construed as limiting the involved claim.

Claims (7)

1. a control circuit of real-time communication, is characterized in that: comprise: a main control circuit, the main control circuit is used for outputting the CLK signal, inputting the DATA signal, and providing power to the subordinate circuit; A communication circuit, the communication circuit includes: a first interface circuit, the first interface circuit is used to connect the CLK signal, the DATD signal and the power supply of the main control circuit, a second interface circuit, the second interface circuit is used to connect an external Hall signal, a shift register, the shift register is electrically connected to the first interface circuit and the second interface circuit respectively, the shift register communicates with the main control circuit through the first interface circuit, and the shift register communicates with the main control circuit through the second interface The circuit detects the Hall signal; The encoding circuit is used for expanding the communication circuit, or for judging whether the communication between the shift register and the main control circuit is normal. 2. a kind of control circuit of real-time communication according to claim 1 is characterized in that: described main control circuit comprises MCU chip, resistance R1, transistor Q1, first CON1 interface; The LD port of described MCU chip is connected through resistance R1 is electrically connected to the base of the transistor Q1, the collector of the transistor Q1 is connected to a 5V power supply, the emitter of the transistor Q1 is connected to one end of the first CON1 interface, and the other ports of the first CON1 interface are respectively connected to the CLK of the MCU chip The signal end and the DATD signal end are electrically connected. 3. The control circuit for real-time communication according to claim 1, wherein the first interface circuit comprises a second CON1 interface, a diode D1, and an RC filter circuit; The corresponding ports of the CON1 interface are connected one by one, one end of the diode D1 is connected to the corresponding end of the second CON1 interface, the other end of the diode D1 is connected to the RC filter circuit, and one end of the RC filter circuit is connected to the second CON1 interface Corresponding end connections. 4 . The control circuit for real-time communication according to claim 3 , wherein the RC filter circuit comprises a circuit composed of a capacitor C1 , a capacitor C2 and a resistor R5 . 5 . 5 . The control circuit for real-time communication according to claim 1 , wherein the shift register is set as a 74HC165 chip. 6 . 6. the control circuit of a kind of real-time communication according to claim 1, is characterized in that: described second interface circuit is electrically connected with E pin, F pin, G pin, H pin of 74HC165 chip respectively . 7. the control circuit of a kind of real-time communication according to claim 1 is characterized in that: described coding circuit is electrically connected with SET pin, A pin, B pin, D pin, C pin of 74HC165 chip respectively. sexual connection.

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