KR920010339B1 - Interfacing method of communication device - Google Patents

Abstract

The equipments having different protocols are interfaced by one interface board using the method. Frame data, operation data, and interface functions are input by a user and then the transmission frame is selected by the interface functions to meet the receiver's frame. The data is transmitted by asynchronous method, and start bit and end bit are added to data by character units.

Description

Interface method of communication device with different protocol

1 is an interface block diagram for explaining a general interface method.

2 is a block diagram of a communication device to which the interface method of the present invention is applied.

3 is an exemplary diagram of a hierarchical structure of input frame information.

4 is an exemplary diagram of a hierarchical structure for determining a path of a transmission frame for a reception frame.

5 is an exemplary view showing a correspondence between an operator and condition information.

6a to (b) are operational relationship diagrams of actual interface functions.

7 is an exemplary diagram of ASCII code frame information applied to the present invention.

8 is a flowchart of an interface signal of the present invention.

* Explanation of symbols for the main parts of the drawings

11: first communication device 11A, 12A: transmitting / receiving unit

12: second communication device 13: input unit

14: central processing unit 20: interface unit

The present invention relates to a method for interfacing communication devices having different protocols. In particular, when a protocol differs between devices whose communication methods are synchronous, the protocol which allows a general purpose of interfacing protocols using a program is provided. It relates to an interface method of different communication devices.

In general, since the controllers produced by each company adopt their own protocols, the operating software (OS S / W) of the central processing unit is used to communicate with the controllers of other companies as shown in FIG. The interbase process is as follows.

When the first communication device 1 sends out the frame FA1 to the central processing unit 3 via the transmitting / receiving unit 1A, it is connected to the second communication device 2 by the operating software of the central processing unit 3. Data and a frame are converted into a frame FB1 through the transmitter / receiver 2A and applied to the second communication device 2, and the second communication device 2 receives the frame FB1. When transmitted, it is converted into a frame FA1 through the interface unit 10 and provided to the first communication device 1.

However, since the operating software that implements the interface of the protocol is designed to be suitable for the device between the two companies, the protocol is impossible to communicate with different devices, and to overcome this, the interface board is purchased for all devices with different protocols. To do so, there was a problem that the additional burden of the cost is generated accordingly.

The present invention has been made in order to solve such a conventional problem, the protocol can perform an interface function using one interface board for different controllers, which will be described in detail with reference to the accompanying drawings.

2 is a block diagram of a communication device to which an interface method having different protocols according to the present invention is applied, and as shown therein, the first and second communication devices 11 and 12 having a predetermined protocol, and the first and second communication methods. (11A) and (12A) for transmitting and receiving data to and from the communication devices (11) and (12), an input unit (13) for receiving user input information, and input information for the input unit (13). In accordance with the present invention, a central processing unit 14 which derives the interface functions of the first and second communication devices 11 and 12 is constructed.

3 is a diagram illustrating a hierarchical structure of frame information input by an input device, and FIG. 4 is a diagram illustrating a hierarchical structure for determining a path of a transmission frame with respect to a reception frame. FIG. 5 is an exemplary diagram showing a correspondence relationship between an operator and condition information. FIGS. 6A and 6B are diagrams illustrating the operation of an actual interface function, and the present invention will be described in detail with reference to the drawings.

The co-synchronization method applied to the present invention transmits data in an asynchronous manner, in which a character unit transmits and inserts a start bit and an end bit before and after the character, respectively.

First, referring to FIGS. 3 to 8 to help understand the present invention, the algorithm of the present invention determines the frame information as shown in FIG. 3 input through the input unit 13 and the path of the transmission frame with respect to the received frame. Consisting of condition information composed of hierarchical structure as shown in FIG. 4 and operator as shown in FIG. 5 in which data conversion and code conversion are performed according to condition information, and functional relationship of frame information, condition information and operation information is expressed. The interface function, which is a method, is performed. The contents of the function are the same as those in FIGS.

The above frame information refers to information defining the start and end of the data and the nature of the data when the data is transmitted, which is shown in FIG. 7 as an ASCII code, where fa1, fa2, fa3, and fa4 are frame information. Say. The condition information refers to the condition equation and condition factor for determining the transmission frame based on the reception frame information. In addition, conditional factor expresses each conditional establishment as logical information (“1” or “0”), and conditional expression is logical expression of several conditional factors.

For example, in the frame,

J1 = (STX = RX_fa1) → J1 = 1 if the first character of received frame is STX

J2 = (W = RX_fa3) → If the third character of the received frame is W, J2 = 1

J3 = (ETX = RX_fa4) → J3 = 1 if the last character of the received frame is ETX

C1 = J1 * J2 * J3 → Condition information C1 becomes “1” when both J1, J2, and J3 are “1”, and is used in the function of determining the transmission frame.

The operation information is information that can be programmed to perform data conversion and correction according to the condition information. In the above example, the example of L1 for C1 can be expressed as L1 → (fa2 = fa2 + 1). When the condition information C1 becomes "1", it is information to increase fa2 by one.

Referring to FIG. 8, the interface process will be described. First, frame information for the A-side and B-side communication devices is inputted into the program device, and the conditional factors, the conditional information, and the operation information are generated and inputted. And input interface function for A side and B side communication device.

Conditional parameters and condition information registered in the I _BA interface function interfaced from A side to B side are calculated and operation information is calculated according to the result, and the transmission frame to be sent to B side is selected based on the condition information.

Transmit to the selected frame B side ③

Condition factors and condition information registered in the I _BA interface function interfaced from B side to A side are calculated, and operation information is calculated according to the result, and the transmission frame to be sent to A side is determined based on the condition information.

Send the selected frame to A side ⑤

In addition, as shown in FIG. 3, the transmission frame T1, T2, T3, ..., Tn and the reception frame R1, R2, R3, ..., Rn are frame configuration factors input by the user through the input unit 13. It is determined by the hierarchical structure of the frame information among (f _A 1, f _{A2, ...,} f _{An + 1} ). As shown in FIG. 4, the condition information C1, C2, ..., Cn is also input by the user. The condition inputted through) is determined as a subset by the hierarchical structure of the condition information in (J1, J2, ..., Jn), and the operators (L1, L2, ..., Ln) are the condition information as shown in FIG. Perform data conversion and code conversion performed on (J1, J2, ..., Jn), and in FIG. 6, T _C , T _D , T _E , T _F ,. , Tn is a transmission frame to be transmitted to the first communication device 11, Re, Rf, Rg, Rh, ... , Rn represents a received frame received at the second communication device 12.

The central processing unit 14 receives a frame configuration factor (e.g., basic unit constituting the frame, STX, EXT, DLE, ..., etc.) and frame configuration factors set by the input unit 13 by the user by the following equation. Indicates.

Transmission frame (T1) = F-fun (f _A1 , f _A3 , f _A4 )

Receive frame (R1) = F-fun (f _A3 , f _A4 )

Further, conditional factors and conditional information are also expressed as follows.

C1 = C-fun (J1, J2)

C2 = C-fun (J3, J4)

Where J1, J2,... , Jn is a condition factor and consists of reception completion, reception error, transmission completion, and user-defined condition factor. However, F_fun (A, B) is a kind of aggregate function that indicates the frame structure and indicates that this frame is composed of A and B frame information, and T1 = F_fun (fa1, fa2, fa3, fa4) transmits T1. The frame indicates that the frame information consists of fa1, fa2, fa3, fa4 in turn.

When the frame information Re registered by the user on the second communication device 12 side is received, the frames T _c and T _E to be transmitted to the first communication device 11 are determined according to the condition information C _ce and C _Ee . If the condition information C _ce is 1, the transmission frame T _c is transmitted. If the condition information C _Ee is 1, the transmission frame T _E is transmitted.

In addition, when the condition information C _ce is 1, the transmission frame T _E is also transmitted to the reception frame R _A received by the first communication device 11 side, and when the condition information C _Ab is 1, the transmission frame T _b is transmitted.

When the operator (L _ce , L _cf ,…,), which is a data conversion code conversion expression, is combined with the path of the transmit frame for the receive frame, the following interface functions are obtained, where L _ce is the receive frame Re in FIG. 6a. Is a formula that can modify or add information of a reception frame when is received or when a transmission frame T _c is transmitted, and L _cf is an operator that is calculated when T _c is transmitted in an R _f frame.

Referring to Equations (1) and (2), the transmission frames T _C and T _D can be transmitted when the reception frame Re is received, and the selection of the transmission frame T _C or T _D is the condition information C _ce , C. It can be seen that it is performed according to the value of _Df , and performed according to the calculation information L _ce , L _Cf , where I _AB (RA) is the first communication device for Re received from the B side, which is the second communication device 12. (11) is an interface function for determining a transmission frame to be transmitted to the A side, and I _BA (RA) is an interface function for determining a transmission frame to be transmitted to the B side for the RA frame received at the A side.

As described in detail above, the present invention can interface with a communication device having any protocol according to the contents of a program by determining an interface function according to operation information and condition information registered by a user to selectively transmit information of a corresponding frame. It works.

Claims (1)

In performing an interface with a communication device having a protocol different from a predetermined communication device, a user inputs frame information, condition information, and operation information of both sides to a program device, and inputs an interface function to a receiving frame of one side. Wherein the selection of the other transmission frame is performed by the interface function.

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