KR101492452B1 - Apparatus for controlling external electric devices - Google Patents

Abstract

An external electronic device control apparatus is disclosed. The external electronic device control device includes a first external device using an interface conforming to the first communication standard and an external device connection portion connected to a second external device using an interface conforming to a second communication standard different from the first communication standard; And a second communication module for converting the signal according to the first communication standard into a signal conforming to the second communication standard and transmitting the signal to the second external device, And a data converter for transmitting the data to the first external device.

Description

[0001] Apparatus for controlling external electric devices [

The present invention relates to an external device control apparatus.

A motor is a device that generates a rotational force on a shaft accommodated therein using a supplied current. Motors are used in a variety of mechanisms, particularly for precise automatic control of specific devices, such as servo mechanisms.

Generally, electronic devices connected to a computer are controlled using an ASCII code. In Korean Patent Laid-Open No. 1998-0003961, a printer is provided with a method of transmitting and receiving information to and from a host using an ASCII code.

However, when an ASCII code is directly input by a user to test or directly control an electronic device connected to a computer, there is a problem that the input itself is difficult because the combination of ASCII codes is not a combination of characters generally used. In addition, when a plurality of electronic components using different communication standards are included in one machine, there is a problem in that interfaces that meet communication standards must be mixed in order to individually communicate with the corresponding electronic components.

The above-described background technology is technical information that the inventor holds for the derivation of the present invention or acquired in the process of deriving the present invention, and can not necessarily be a known technology disclosed to the general public prior to the filing of the present invention.

The present invention provides an external electronic device control device capable of mutually exchanging data between various communication standards to simplify the wires used in the device and to establish a development environment for the user.

The technical problems other than the present invention can be easily understood from the following description.

According to an aspect of the present invention, there is provided a communication system including: a first external device using an interface according to a first communication standard; an external device connection unit connected to a second external device using an interface according to a second communication standard different from the first communication standard; And a second communication module for converting the signal according to the first communication standard into a signal conforming to the second communication standard and transmitting the signal to the second external device, There is provided an external electronic device control apparatus including a data converter for transmitting data to a first external device.

Here, the first communication standard may be RS-485, and the second communication standard may be RS-232C.

Other aspects, features, and advantages will become apparent from the following drawings, claims, and detailed description of the invention.

The external electronic device control apparatus according to the present invention has an effect of automatically transmitting and receiving mutual data between various communication standards in order to simplify the wires used in the device and to establish a development environment for the user with ease.

1 is a block diagram of an external device control apparatus according to an embodiment of the present invention;
2 is a diagram showing general instructions of an external device control apparatus according to an embodiment of the present invention.
3 is a diagram showing a multi-command of an external device control apparatus according to an embodiment of the present invention.
4 is a circuit diagram of an external device control apparatus according to another embodiment of the present invention.
5 is a circuit diagram of an external device control apparatus according to another embodiment of the present invention.

While the invention is susceptible to various modifications and alternative forms, specific embodiments thereof are shown by way of example in the drawings and will herein be described in detail. It is to be understood, however, that the invention is not to be limited to the specific embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

Terms including ordinals, such as first, second, etc., may be used to describe various elements, but the elements are not limited to these terms. The terms are used only for the purpose of distinguishing one component from another.

It is to be understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, .

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In this specification, the terms "comprises" or "having" and the like refer to the presence of stated features, integers, steps, operations, elements, components, or combinations thereof, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

The term " part, "" module," " means, "or the like, which is described in the specification, refers to a unit for processing at least one function or operation and may be implemented by hardware or software or a combination of hardware and software .

In the following description of the present invention with reference to the accompanying drawings, the same components are denoted by the same reference numerals regardless of the reference numerals, and redundant explanations thereof will be omitted. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail.

1 is a block diagram of an external electronic device control apparatus according to an embodiment of the present invention. 1, the external electronic device control apparatus 100 may include a character receiving unit 110, a command storage unit 120, an external device control unit 130, and a control unit 140. [

The present embodiment is characterized in that a user directly inputs a character from a terminal to a keyboard to control an external electronic device. Specifically, the present embodiment specifically provides a command for controlling an external electronic device using only a character that can be input by a user using a keyboard.

The external electronic device of this embodiment is an apparatus operated by an electrical signal transmitted by a user through a computer, and may be, for example, a motor, an LCD panel, or the like. Hereinafter, embodiments will be described with reference to the case where the external electronic device is a servo motor. The user can test the external electronic device using the keyboard of the computer or make the external electronic device according to the specific position and the specification.

The character receiving unit 110 receives a character corresponding to an ASCII code input from a keyboard connected to the computer. The ASCII codes that can be input from the keyboard are the characters displayed on the keyboard. That is, the user inputs characters, such as numbers, letters, and special characters ($, #, @, *, etc.) that can be normally input using the keyboard, to the character receiving unit 110. Thereafter, the input characters can be combined or modified into an ASCII code recognizable by the external electronic device.

The command storage unit 120 combines the ASCII codes received by the character receiving unit 110 and generates and stores a command to be received and controlled by an external electronic device connected to the computer. Here, the external electronic device can perform a specific operation such as initialization, positioning, speed control, torque generation, rotation direction, optical output, specific data output, etc., by receiving a command to be stored.

The command stored in the command storage unit 120 may be a command that can be immediately recognized by the external electronic device. In this case, the stored command may be a combination of characters corresponding to the ASCII code input from the keyboard connected to the computer, or may be a specific command corresponding to the ASCII code input from the keyboard. In the latter case, a combination of characters input from the keyboard and a specific command for controlling the external electronic device may correspond to each other. In this case, the present embodiment may include a table in which characters of a keyboard character and external electronic device control commands are associated with each other and a table of correspondence of commands.

When the combination of the ASCII codes received by the character receiving unit 110 corresponds to a specific instruction stored in the instruction storage unit 120, the external device control unit 130 controls the external electronic device connected to the computer to perform a combination of ASCII codes, Control according to the command.

The control unit 140 controls each of the functional units so that the character receiving unit 110, the instruction storage unit 120, and the external device control unit 130 interlock with each other and perform their own functions.

2, general instructions of an external electronic device control apparatus are shown. Here, the general command represents a command applied to one device. Each command consists only of characters that the user can enter using the keyboard of the computer.

For example, the code indicating the factory initialization command, which is a command type included in the command, is $ I, the command parameter is 0, the source ID is the source device specified by the user, and the destination ID (Dest ID) And the data (Data1 and Data2) may be actual data to be transmitted to the device. In addition, CRC8 can be used for error detection, and the termination of an instruction can be specified by a character such as "\ r (0x0D)".

In addition, various commands can be specified as characters, such as $ P for a command indicating a motor position and $ S for a command indicating a motor operation speed. In this embodiment, the commands for controlling the motor may be combined using only the characters displayed on the keyboard of the computer in general.

For example, $ I001020000 can be a command to initialize the first motor to the second motor, and $ P000010360 can be the command to turn the 360th (03,60) rotation command to the first master .

In this case, since the CRC8 for detecting protocol communication error is not used in the short distance communication (terminal mode), the CRC digit can be deleted. At this time, the present embodiment may include a mode changing unit for changing to a terminal mode, for example, a switch, a button, and the like. In this mode, both sending and receiving can be in terminal mode.

Further, in the telecommunication (error detection mode), an error can be detected using the CRC8 for protocol error detection. The error retransmission request can be set to about 2 to 5 times. In this mode both sender and receiver can be in error detection mode.

Referring to Fig. 3, a multi-instruction of the external electronic device control apparatus is shown. Here, the multi-instruction word indicates a command applied to a plurality of devices collectively. The multi-command consists of only the characters that the user can input using the keyboard of the computer.

For example, a code indicating a control command of a plurality of external electronic devices as command types is $ M, a command parameter is 0, a source ID is a source device specified by a user, and a destination ID (Dest ID) The data (Data1 and Data2) can be the actual data to be transmitted to the device. In the case of the motor, the position data and the speed data are included can do. As described above, in addition, the CRC 8 can be used for error detection, and the end of an instruction can be specified by a character such as "\ r (0x0D) ".

Here, every time the number of motors increases by one, the amount of data increases by 10 bytes in total from ID_1st to Data4. That is, if the number of motors is two, Up to ID_1st-Data4, which is the ID of the motor, is added immediately to ID_2nd-Data4 which is the ID of the second motor. The source ID for sending the message is all 00 to 98, but the destination ID in the multi-command is 99, and the receiver can recognize that this command is a multi-command. IDs corresponding to ID_1st are all possible up to 00-98.

In this case, according to the present embodiment, it is possible to save the size of the whole data as compared with the case of controlling each of the plurality of external electronic devices at a time by controlling each of the external electronic devices individually. For example, the external device control unit 130 can control a plurality of external electronic devices of the same type by using the same command parameters, source ID, and data in the command.

In this case, the size of data to be saved will be described with reference to FIG. If the signal size is separately transmitted for each motor, the CRC 8 and the end field value (b) not shown in FIG. 3 are added to the field size value (a) from the command field to the Dest ID, Is a value D obtained by multiplying a value c corresponding to the number of motors to be controlled. However, when the data is transmitted to a plurality of motors at one time, the signal size required is 1 byte indicating the motor count field in the result value obtained by adding CRC8 and the end field value (b) to the field value (a) And the magnitude value (E) is the sum of the magnitudes. Therefore, when data is transmitted to a plurality of motors at one time, the saved signal size becomes D-E.

In the case of the motor, the present embodiment can transmit the position data and the speed data in a single instruction word. In this case, assuming that the position data size is p and the speed data size is s, the total signal size for transmitting the data individually is (a + b + p + s) * c, (a + b + p + s) +1, the signal size can be saved by the difference between the two values according to the present embodiment.

According to the above-described embodiment, a general and multi-command system can be constructed by combining a plurality of ASCII codes that can be generated in the keyboard among the ASCII codes. In this embodiment, the external electronic device can be controlled by directly inputting the character with the keyboard in the terminal, the external electronic device can be directly tested by inputting from the communication terminal of the window, for example, the hyper terminal, Even if you do not use it, you can test it immediately.

An external electronic device control device has been described above, and an apparatus for controlling a plurality of external devices using one interface according to different communication standards will be described below. The embodiments described below may be additionally implemented in addition to the above-described embodiments, or may be independently implemented without being combined with other embodiments.

Generally, the motor is controlled using RS-485, RS-232C, Half Duplex RS-485, Half Duplex RS-232C, I2C, CAN communication, etc. This embodiment proposes a circuit capable of mutually exchanging data between RS-485 and Half RS-232C UART in order to construct a development environment for the user and simplify the wires used in the device. That is, this embodiment proposes an embedded module for controlling through a single PHY when a communication PHY (physical layer) of a motor is mixed (for example, Half RS-232C and Half RS-485).

The present invention can be applied to other standards such as RS-485, RS-232C, Half Duplex RS-485, Half Duplex RS-232C, I2C, and CAN communication standards.

The present embodiment is characterized in that a first external device using an interface conforming to a first communication standard, an external device connection portion connected to a second external device using an interface conforming to a second communication standard different from the first communication standard, Converts the signal according to the second communication standard into a signal according to the first communication standard and transmits the signal according to the second communication standard to the first external device and transmits the signal according to the first communication standard to the first external device . Here, the first communication standard may be RS-485, and the second communication standard may be RS-232C.

Here, the board manufactured according to the present embodiment transmits a command through the RS-485 to the RX signal of the Half RS-232C, that is, the command is automatically sent to the motor, and the TX signal of the Half RS-232C , And the response signal (ACK) of the motor is transmitted to the RX of RS-485, so that mutual data exchange is possible in real time. As a result, the two types of motors are very conveniently placed into the same control network via a single 485 cable, so thin cables can be used. Therefore, according to the present embodiment, there is less failure or the like, the weight of the electric wire is reduced, and the torque applied to the motor is also reduced.

In the conventional technology, the RS-232C is capable of a full duplex system in which both the transmission and the reception are present, whereas the technology according to the present embodiment converts the RS-232C into Half RS-232C to RS-485 Provide the board. In this case, the number of control lines is advantageous because the number of lines is controlled by one common line. In this case, automatic transmission / reception conversion is not easy due to a timing relationship. According to the present embodiment, mutual data can be transmitted at high speed without automatically losing data to different serial PHYs (Physical Layers).

Also, during downloading of data to the AVR by the ISP, the download data comes out to the serial monitoring port, which causes the terminal to fail. This embodiment uses a 74HC4053D to fabricate a specially designed circuit to eliminate this fault. 4 and 5 show a circuit for performing the above-mentioned functions.

In Fig. 4, the above circuit is a circuit that automatically communicates from RS-485 to RS-232C. The / SHDN of the chip is always operated by inputting HIGH, and / RE is inputted HIGH to determine the automatic communication direction to the receiver. In addition, by controlling R4, the impedance can be adjusted, and DI is pulled up to make the output form non-inverting output.

In the signal flow, the RS-485 output uses A and B, and A connects to TX + and B connects to TX-. RO (Receiver Output) and DI (Driver Transmitter Input) are connected to RXD and TXD of TTL level, respectively, and directly connected to MCU. That is, when outputting from the MCU, it outputs through the DI, and when the data is inputted to the RO side, the MCU receives the input data. In a normal reception mode, if there is no data reception, the accumulated data can be transmitted.

The circuit in the lower part of Fig. 4 is a circuit which communicates with RS-232C in Half RS-232C. When SEND_232 is HIGH, it is possible to output TTL level transmission data of MCU. When it is LOW, it is possible to transmit data received by Half RS-232C to MCU in TTl Level reception data form.

The operational function of this embodiment can be circuitly connected to UART0 (Auto RS-485) and UART1 (Half RS-232C) shown in the circuit.

First, in case of UART0, the data received by UART0 is transmitted via UART1. UART0 can be in normal receive mode. In this case, the SEND 232 pin can be output as 0. If there is data to be sent from UART0, change to transmit mode. In this case, the SEND232 pin can be output as 1.

In case of UART1, the data received by UART1 is transmitted via UART1. UART1 can be in the normal receive mode. If there is data to be sent from UART1, UART1 can be changed to transmit mode. In this case, if there is data to be transmitted, the mode changing unit can change the UART1 to the transmission mode.

In this case, since the data must be received and transmitted at a very high speed, a timing relationship problem may arise. To solve this problem, the present embodiment can receive data in the ring buffer for each UART in an interrupt manner, and slowly transmit the received data when the AVR is not busy.

Here, changing the SEND 232 pin does not directly change the transmission mode or the reception mode, but it requires a settling time, stabilizes the data using an appropriate delay, and then transmits the data.

The present embodiment can operate in two modes as follows. First, when an RS-485 command is received, the motor bit on the RS-232C side receives the command. After moving, the ACK signal is transmitted to the RS-485. Also, according to another embodiment, an RS-485 motor operates in an instruction issued from the RS-485 line, and the ACK can be simultaneously transmitted to the RS-232C side and the RS-485 side.

In this way, the present embodiment provides a communication hardware converter so that even if the hardware protocols are different, the communication hardware converter can be interlocked with one control line, so that devices of different communication PHY types can be connected to each other and operate. This feature can be used between serial protocol type motors, lighting devices, and various network devices.

The description of the specific operation method, the type of external electronic device, and the use place of the external electronic device control device according to the embodiment of the present invention is obvious to those skilled in the art. .

In addition, each of the above-described components may be embodied as one physically adjacent component or may be implemented as a different component. In the latter case, each component can be controlled to be coupled adjacently, detachably coupled to each other, or positioned in different zones.

In the above description, the respective components and / or functions described in the embodiments may be combined and combined, and those skilled in the art will understand that the present invention It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention.

100: external electronic device control unit 110: character receiving unit
120: command storage unit 130: external device control unit
140: control unit

Claims (2)

An external device connection unit connected to a first external device (UART0) using an interface according to a first communication standard and a second external device (UART1) using an interface according to a second communication standard different from the first communication standard; And
Converts the signal according to the first communication standard into a signal according to the second communication standard and transmits the signal according to the second communication standard to the second external device, 1 < / RTI > to an external device,
Wherein the first external device transmits data received by the first external device through the second external device and the first external device is in a normal reception mode and changes to a transmission mode when data to be transmitted from the first external device occurs,
Wherein the second external device transmits data received by the second external device through the second external device and the second external device is in a normal reception mode and changes to a transmission mode when data to be transmitted to the second external device occurs,
Wherein the change of the first external device and the second external device to the transmission mode is performed in an interrupt manner.
The method according to claim 1,
Wherein the first communication standard is RS-485, and the second communication standard is RS-232C.

Images