CN206773692U - A kind of telecommunication circuit - Google Patents

Abstract

The utility model discloses a kind of telecommunication circuit, the telecommunication circuit includes controller, and the controller includes master controller and from controller；The RXD pins of the UART interface of the master controller are connected with the TXD pins of the UART interface from controller, and the TXD pins of the UART interface of the master controller are connected with the RXD pins of the UART interface from controller；It is also positive to concatenate a diode between the RXD pins of the UART interface of the master controller and the TXD pins of the UART interface from controller；Its effect is：Using two data lines cans and multiple UART equipment communications, more economized on resources than traditional scheme.

Description

A kind of telecommunication circuit

Technical field

The utility model belongs to telecommunication circuit technical field, and in particular to a kind of telecommunication circuit.

Background technology

With the continuous development of electronic industry, there is increasing electronic module, these modules make it that user can be with Certain electric function can be used not the circuit design or written in code that contact the bottom, has substantial amounts of electronics on existing market Module is to be used as communication interface using UART interface.

But in the prior art, UART interface can only realize man-to-man communication, but need to use a variety of electricity in many occasions Submodule, it just may require that a UART interface and multiple UART equipment communications.

The content of the invention

In order to solve the above problems, the utility model proposes a kind of telecommunication circuit, to overcome a band in the prior art The defects of equipment of UART interface can only be with a UART equipment communication.

The technical scheme that the utility model is taken is：A kind of telecommunication circuit, including controller, the controller include master control Device processed and from controller；The RXD pins of the UART interface of the master controller and the TXD of the UART interface from controller draw Pin is connected, and the TXD pins of the UART interface of the master controller are connected with the RXD pins of the UART interface from controller； Between the RXD pins of the UART interface of the master controller and the TXD pins of the UART interface from controller, also positive string Connect a diode；By series diode, when preventing multiple slaves output varying levels, there is communication contention aware, short circuit in bus Situation.

The RXD pins of the UART interface of the master controller electrically connect with described from a detection input of controller；It is logical The high and low level state for monitoring the detection input is crossed, judges whether bus is idle condition.

For the quantity from controller to be multiple, such master controller can passes through a UART port and multiple from control Device processed is communicated.

The master controller and it is described use MCU processors from controller, using MCU processor low costs, disposal ability By force, the development and application for meeting user are entirely capable of.

The master controller and it is described from controller when carrying out communications, the baud rate that the UART interface is set is Any baud rate；By in this way, being easy to carry out data exchange with extraneous miscellaneous equipment.

The master controller and it is described from controller when carrying out communications, UART protocol be provided with one or two stopping Position；Improve the master controller and described can enter when carrying out communications row clock synchronization from controller.

Using above-mentioned technical proposal, there is advantages below：It will not be interfered with each other from the TXD between controller, use two Data wire can and multiple UART equipment communications, more economize on resources than traditional scheme.

Brief description of the drawings

Fig. 1 is telecommunication circuit schematic diagram of the present utility model.

Embodiment

To make the technical problems to be solved in the utility model, technical scheme and advantage clearer, below in conjunction with accompanying drawing And specific embodiment is described in detail, description here is not meant that corresponding to all of the instantiation stated in embodiment Theme all refer in the claims.

With reference to shown in figure 1, a kind of telecommunication circuit, including controller, the controller includes master controller and from controller； The RXD pins of the UART interface of the master controller are connected with the TXD pins of the UART interface from controller, the master control The TXD pins of the UART interface of device processed are connected with the RXD pins of the UART interface from controller；The master controller It is also positive to concatenate a diode between the RXD pins of UART interface and the TXD pins of the UART interface from controller；It is logical So connection is crossed, the data that master controller transmission can be received from controller is ensure that, each diode of series connection, avoids It will not be interfered with each other between each TXD pins from controller, as long as being sent during each difference from controller, master controller is with regard to energy Correct data are received, multiple UART equipment is controlled using two data lines cans, is more economized on resources than traditional scheme.

A kind of described telecommunication circuit, the RXD pins of the UART interface of the master controller with it is described from the one of controller Detection input electrically connects；By monitoring the high and low level state of the detection input, confirm Current bus whether in sky Not busy state, it is idle condition, vice versa during high level；Monitor that for the free time, data are just sent from controller for bus.

Further, the quantity from controller is multiple.

Further, the master controller and described MCU processors are used from controller.

Further, the master controller and it is described from controller when carrying out communications, the UART interface is set Baud rate be any baud rate.

Further, the master controller and it is described from controller when carrying out communications, UART protocol be provided with one Or two stop positions.

Operation principle of the present utility model is：When master controller is needed with multiple UART equipment communications, pass through main control TXD pins in the UART interface of device send data, when sending data by data content and destination address one from controller Rise and transmit, from controller by after the parsing of the data of the packet, by destination address with itself from address compared with, Address matching then preserves data, and mismatch then gives up data, so as to realize that two data lines cans are led to multiple UART equipment Letter, more economizes on resources than traditional scheme；It is empty in bus from controller by monitoring the high and low level state of detection input Idle, data are sent to the master controller, are avoided from conflicting mutually between controller.

Here, it is to be noted that, the function that the utility model is related to, algorithm, method etc. are only the routine of prior art Adaptability application.Therefore, improvement of the utility model for prior art, the annexation being substantially between hardware, rather than For function, algorithm, method in itself, i.e., although the utility model is related to some functions, algorithm, method, but and not comprising to work( The improvement that energy, algorithm, method propose in itself.The utility model is to preferably say for function, the description of algorithm, method Bright the utility model, to be better understood from the utility model.

Finally it should be noted that foregoing description is preferred embodiment of the present utility model, the ordinary skill people of this area Member on the premise of without prejudice to the utility model aims and claim, can make a variety of under enlightenment of the present utility model Similar expression, such conversion are each fallen within the scope of protection of the utility model.

Claims (6)

1. a kind of telecommunication circuit, it is characterised in that including controller, the controller includes master controller and from controller；Institute The RXD pins for stating the UART interface of master controller are connected with the TXD pins of the UART interface from controller, the main control The TXD pins of the UART interface of device are connected with the RXD pins of the UART interface from controller；The UART of the master controller It is also positive to concatenate a diode between the RXD pins of interface and the TXD pins of the UART interface from controller.

A kind of 2. telecommunication circuit according to claim 1, it is characterised in that the RXD of the UART interface of the master controller Pin electrically connects with described from a detection input of controller.

3. a kind of telecommunication circuit according to claim 2, it is characterised in that the quantity from controller is multiple.

4. a kind of telecommunication circuit according to claim 3, it is characterised in that the master controller and described adopted from controller With MCU processors.

5. a kind of telecommunication circuit according to claim 4, it is characterised in that the master controller and described exist from controller When carrying out communications, the baud rate that the UART interface is set is any baud rate.

A kind of 6. telecommunication circuit according to claim 5, it is characterised in that：The master controller and described exist from controller When carrying out communications, UART protocol is provided with one or two stop positions.