CN219533777U - Remote communication serial communication equipment - Google Patents

Abstract

The utility model discloses serial communication equipment for remote communication, which comprises four paths of bidirectional self-adaptive IO modules, wherein each path of bidirectional self-adaptive IO module can output high level and low level; the microprocessor unit is connected with the four paths of the bidirectional self-adaptive IO modules and is used for sending control instructions to each path of the bidirectional self-adaptive IO modules and controlling the output level of the bidirectional self-adaptive IO modules; the serial interface chip is respectively connected with the bidirectional self-adaptive IO module through four paths of line measuring units and is used for carrying out remote communication interaction with the bidirectional self-adaptive IO module.

Description

Remote communication serial communication equipment

Technical Field

The utility model relates to the technical field of serial bus connection, in particular to serial communication equipment for long-distance communication.

Background

The universal serial bus is a serial bus standard for connecting external devices, is widely used on computers, but can also be used on set-top boxes and game machines, and supplements the standard to enable the direct exchange of data between portable devices.

The common serial bus interface protocols SPI, I2C and the like are defined as short-distance application or 'board-level' application, namely, ideal use conditions of electronic elements with the serial bus ports SPI and I2C are all in the same PCB, and the communication distance of the common SPI and I2C communication interface protocols is severely limited.

Disclosure of Invention

The utility model aims to provide serial communication equipment for long-distance communication, which solves the technical problem that the communication distance of electronic elements with serial bus ports SPI and I2C in the prior art is short.

In order to solve the technical problems, the utility model specifically provides the following technical scheme:

a serial communications device for long range communications, comprising:

four paths of bidirectional self-adaptive IO modules, wherein each path of bidirectional self-adaptive IO module can output high level and low level;

the microprocessor unit is connected with the four paths of the bidirectional self-adaptive IO modules and is used for sending control instructions to each path of the bidirectional self-adaptive IO modules and controlling the output level of the bidirectional self-adaptive IO modules;

and the serial interface chip is respectively connected with the bidirectional self-adaptive IO module through four paths of test line units and is used for carrying out remote communication interaction with the bidirectional self-adaptive IO module.

As a preferable scheme of the utility model, each line unit comprises a 1Wire signal line and an equivalent resistor, wherein the 1Wire signal line has bidirectional data transmission and clock transmission functions.

As a preferred embodiment of the present utility model, the serial interface chip is a chip having an I2C interface or an SPI interface.

As a preferred scheme of the present utility model, the bidirectional adaptive IO module includes two logic signal isolators, a data line strong driving circuit disposed on the line unit connected to the logic signal isolators, and a programmable level logic regulator connected to the logic signal isolators;

the microprocessor unit is connected with the two logic signal isolators through four IO ports, and the data line strong driving circuit is in communication connection with the serial interface chip through the 1Wire signal line.

As a preferable scheme of the utility model, the four IO ports are respectively an IO1 port and an IO2 port which are connected with the same logic signal isolator, and an IO3 port and an IO4 port which are connected with the other logic signal isolator.

Compared with the prior art, the utility model has the following beneficial effects:

the utility model solves the problem of limited distance during long-distance low-voltage communication, and increases the communication distance to the kilometer level compared with the communication on the same PCB, thereby realizing the function of changing the board-level bus protocol into long-distance self-adaption.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It will be apparent to those of ordinary skill in the art that the drawings in the following description are exemplary only and that other implementations can be obtained from the extensions of the drawings provided without inventive effort.

FIG. 1 is a block diagram of a serial bus device according to an embodiment of the present utility model;

fig. 2 is a connection diagram of a bidirectional adaptive IO module according to an embodiment of the present utility model.

Reference numerals in the drawings are respectively as follows:

1-a line measuring unit; 2-a bi-directional adaptive IO module; a 3-microprocessor unit; 4-serial interface chip.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

As shown in fig. 1 and 2, the present utility model provides a serial communication device for remote communication, which includes a microprocessor unit 3, four paths of bidirectional adaptive IO modules 2 connected to the microprocessor unit 3, and a serial interface chip 4 connected to the four paths of bidirectional adaptive IO modules 2 through a line unit 1.

Each path of the bidirectional self-adaptive IO module 2 can output high level and low level, the microprocessor unit 3 is connected with four paths of the bidirectional self-adaptive IO modules 2, and the microprocessor unit 3 is used for sending control instructions to each path of the bidirectional self-adaptive IO modules 2 and controlling the output level of the bidirectional self-adaptive IO modules.

Each line unit 1 comprises a 1Wire signal line and an equivalent resistor, wherein the 1Wire signal line has bidirectional data transmission and clock transmission functions.

The serial interface chip 4 is respectively connected with the bidirectional self-adaptive IO module 2 through four-way line units 1 and is used for carrying out remote communication interaction with the bidirectional self-adaptive IO module 2, and the serial interface chip 4 is specifically a serial chip provided with an I2C interface or an SPI interface.

The existing common serial buses SPI, I2C, etc. are all defined as short range applications or "board level" applications, namely: the ideal use cases are all in the same PCB board, and the application range of the common communication interface protocols is severely limited.

The implementation mode solves the problem of limited distance during long-distance low-voltage communication through a 1Wire long-distance communication technology, and the technology is expanded to meet the use requirement of the plurality of other interfaces, so that the board level is changed into long-distance, and compared with the situation that the board level is communicated on the same PCB, the implementation mode enables the communication distance to be increased to the kilometer level, has isolation protection and has strong engineering application prospect.

The conventional serial interface chip 4 is commonly used as serial buses such as SPI, I2C, etc., and is defined as a short-range application or a "board-level" application, namely: the ideal use cases are all in the same PCB board, and the application range of the common communication interface protocols is severely limited.

In the present embodiment, the problem of limiting the communication distance during the long-distance low-voltage communication is solved by using the long-distance communication technology of the 1Wire signal line, so that the board level is changed into long-distance, and the communication distance in the present embodiment is increased to the kilometer level compared with the communication on the same PCB.

The line unit 1 is specifically a 1Wire signal line, the 1-1Wire single bus adopts a single signal line, so that clock is transmitted, data is transmitted, and data transmission is bidirectional.

It should be noted that, as shown in fig. 2, the bidirectional adaptive IO module 2 includes two logic signal isolators, a data line strong driving circuit connected to one of the logic signal isolators, and a programmable level logic regulator connected to the other logic signal isolator.

The microprocessor unit 3 is connected with two logic signal isolators by using four IO ports, the data line strong driving circuit is connected with the serial interface chip 4 in a communication way through the 1Wire signal line, and the specific bidirectional self-adaptive IO module 2 can complete the tasks of floating level adaptation, comparator voltage setting and the like under the control of the microprocessor unit 3.

The four IO ports are respectively an IO1 port and an IO2 port which are connected with the same logic signal isolator, and an IO3 port and an IO4 port which are connected with the other logic signal isolator.

It should be noted that, in this embodiment, the microprocessor unit 3 regulates the input/output data of the logic signal isolator by controlling the output levels of the IO1 port and the IO2 port, and the IO3 port and the IO4 port, and the logic signal isolator completes the conduction of the bidirectional communication signal between the serial interface chips 4.

The logic signal isolator consists of two groups of digital magnetic isolation chips which are respectively connected with the I/O interface of the microprocessor unit 3 and are mainly used for conducting the bidirectional communication data signals and logic signals between the microprocessor unit 3 and the serial interface chip 4.

The data line strong driving circuit comprises a pull-up resistor R3 and a pull-up resistor R4 which are connected with a digital magnetic isolation chip, and a PMOS tube which is connected between the pull-up resistor R3 and the pull-up resistor R4.

The microprocessor unit 3 has four I/O interfaces, i.e. an IO1 interface, an IO2 interface, an IO3 interface and an IO4 interface, respectively.

The IO1 interface is responsible for controlling the strong pull-up PMOS tube when the input direction and the output direction of the data are switched.

The IO2 interface is used for outputting in the communication process.

The IO3 interface is used for receiving a data logic high signal returned by the 1Wire chip.

The IO4 interface is used for receiving a data logic low signal returned by the 1Wire chip.

The IO3 interface and the IO4 interface are both open-drain inputs, the IO3 interface defaults to be low level under the action of a pull-down resistor, and the IO4 interface defaults to be high level under the action of the pull-up resistor.

Further, the IO1 interface and IO2 interface combination is connected with one digital magnetic isolation chip, and the IO3 interface and IO4 interface combination is connected with the other digital magnetic isolation chip.

The data line strong driving circuit is arranged on the 1Wire signal line, is connected with the microprocessor unit 3 through a logic signal isolator connected with the IO1 interface and the IO2 interface, and is controlled by the microprocessor unit 3.

The programmable level logic regulator consists of a multi-path programmable voltage divider, a multi-path operational amplifier and a linear optical coupler isolator, wherein the programmable voltage divider adopts AD5246, and the linear optical coupler isolator adopts HCPL7800.

The multiple programmable voltage dividers are respectively connected with the microprocessor unit 3, and the adjustable potentiometer in the programmable voltage divider is connected with the microprocessor unit 3 and adjusts the output voltage of the programmable voltage divider under the control of the microprocessor unit 3.

The linear optocoupler isolator is connected with the microprocessor unit 3 and is responsible for conducting the voltage signal on the line unit 3 to the ADC converter inside the microprocessor unit 3.

The output ends of the multi-path operational amplifier of the programmable voltage divider are respectively arranged on the digital magnetic isolation chips connected with the IO3 interface and the IO4 interface, the reverse output ends of the multi-path operational amplifier are respectively connected to the multi-path programmable voltage divider, and the homodromous input ends of the multi-path operational amplifier are respectively connected with the linear optocoupler isolator and connected to the 1Wire signal line.

Therefore, the multi-channel bidirectional self-adaptive IO module 2 of the present embodiment is respectively used for implementing the bidirectional functions of data reading and data writing of the serial interface chip 4 by the microprocessor unit 3, and reducing the influence of the equivalent resistance of the line unit 1 on communication by using the voltage adjustment mode of the programmable voltage divider.

The implementation mode solves the problem of limited distance during long-distance low-voltage communication, and compared with the technology which has to communicate on the same PCB, the technology increases the communication distance to the level of kilometers, and realizes the function of changing a board-level bus protocol into a long-distance self-adaption.

The above embodiments are only exemplary embodiments of the present utility model and are not intended to limit the present utility model, the scope of which is defined by the claims. Various modifications and equivalent arrangements of this utility model will occur to those skilled in the art, and are intended to be within the spirit and scope of the utility model.

Claims (5)

1. A serial communications device for remote communications, comprising:

four paths of bidirectional self-adaptive IO modules (2), wherein each path of bidirectional self-adaptive IO module (2) can output high level and low level;

the microprocessor unit (3) is connected with the four paths of the bidirectional self-adaptive IO modules (2), and the microprocessor unit (3) is used for sending control instructions to each path of the bidirectional self-adaptive IO modules (2) and controlling the output level of the bidirectional self-adaptive IO modules;

the serial interface chip (4) is respectively connected with the bidirectional self-adaptive IO module (2) through four paths of test line units (1) and is used for carrying out remote communication interaction with the bidirectional self-adaptive IO module (2).

2. A telecommunications device according to claim 1, wherein,

each line unit (1) comprises a 1Wire signal line and an equivalent resistor, wherein the 1Wire signal line has bidirectional data transmission and clock transmission functions.

3. A telecommunications device according to claim 1, wherein,

the serial interface chip (4) is a chip with an I2C interface or an SPI interface.

4. A serial communication device for long distance communication according to claim 2, wherein,

the bidirectional self-adaptive IO module (2) comprises two logic signal isolators, a data line strong driving circuit arranged on the test line unit (1) connected with the logic signal isolators, and a programmable level logic regulator connected with the logic signal isolators;

the microprocessor unit (3) is connected with the two logic signal isolators by using four IO ports, and the data line strong driving circuit is in communication connection with the serial interface chip (4) through the 1Wire signal line.

5. A telecommunications device according to claim 4, wherein,

the four IO ports are respectively an IO1 port and an IO2 port which are connected with the same logic signal isolator, and an IO3 port and an IO4 port which are connected with the other logic signal isolator.