KR20160121034A - Apparatus and method for serial communication control - Google Patents

Abstract

Disclosed are an apparatus and a method for serial communication control. The apparatus for serial communication control includes an interrupt process part which analyzes serial data received through a serial port of a smart plug device in a byte unit to be configured in a packet unit, a buffer process part which classifies reception data configured in the packet unit according to types of messages, so as to be stored as buffer data of a packet column type, and a reception function process part which extracts real data from the buffer data and transmits the extracted real data to an application program through an application program interface. So, serial communication with high reliability can be provided.

Description

[0001] Apparatus and method for serial communication control [

The present invention relates to an apparatus and a method for controlling a serial communication.

In order to cope with the rapid increase of energy demand and to cope with environmental change, researches on demand management technology based on energy saving at the consumer end are becoming active all over the world. In addition to the information of total energy consumption in houses, buildings and factories, The spread of smart plug devices that perform energy consumption monitoring and power control functions for individual load devices consuming energy is becoming more active.

Smart plug devices are developed in the form of ultra-lightweight embedded systems mainly due to the characteristics of devices corresponding to the end users in terms of smart grid technology. RS232C-based serial communication is mainly used for communication between internal hardware modules. However, the Smart Plug technology requires a high reliability of the serial communication due to the nature of the energy network in which a plurality of Smart Plug devices are connected to one Smart Plug concentrator (access point) and a control message is transmitted in addition to the metering data.

Therefore, there is a need for a communication message format, a processing procedure, and an optimal management method for various kinds of messages for enhancing the reliability of serial communication in software without adding hardware in a Smart Plug device in the form of an embedded system of low power and low cost.

The present invention proposes a serial communication control apparatus and method for providing a highly reliable serial communication in a smart plug device in the form of an embedded system of low power and low cost.

According to an aspect of the present invention, a serial communication control device for controlling serial communication of a smart plug device is disclosed.

The serial communication control apparatus according to an embodiment of the present invention includes an interrupt processor for analyzing serial data received through a serial port of the Smart Plug device on a byte-by-byte basis to form packet units, And a reception function processor for extracting actual data from the buffer data and transmitting the extracted actual data to an application program through an application program interface.

The present invention can provide a highly reliable serial communication in a Smart Plug device in the form of an embedded system of low power and low cost.

1 schematically illustrates a configuration of a smart plug device;
2 is a diagram schematically illustrating a configuration of a serial communication control device;
3 is a view schematically illustrating the configuration of the interrupt processing unit of FIG. 2;
Fig. 4 is a diagram for explaining a method of processing received data in the serial communication control apparatus of Fig. 2; Fig.
Fig. 5 is a diagram for explaining a method of processing transmission data in the serial communication control apparatus of Fig. 2; Fig.

While the present invention has been described in connection with certain exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and similarities. It should be understood, however, that the invention is not intended to be limited to the particular embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the following description of the present invention, detailed description of known related arts will be omitted when it is determined that the gist of the present invention may be unnecessarily obscured. In addition, numerals used in the description of the present invention are merely an identifier for distinguishing one component from another.

Also, in this specification, when an element is referred to as being "connected" or "connected" with another element, the element may be directly connected or directly connected to the other element, It should be understood that, unless an opposite description is present, it may be connected or connected via another element in the middle.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In order to facilitate a thorough understanding of the present invention, the same reference numerals are used for the same means regardless of the number of the drawings.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic illustration of a configuration of a smart plug device. FIG.

Referring to FIG. 1, the smart plug device 100 includes an energy metering module 110, an embedded CPU module 120, a power control module 130, and a wired / wireless communication module 140.

The energy metering module 110 measures energy usage of the load device 300 and collects energy usage data of the load device 300. Here, the collected energy usage data may be transmitted to the CPU module 120 via the serial communication.

The power control module 130 controls power supply to the load device 300 under the control of the embedded CPU module 120.

The wired / wireless communication module 140 is connected to the smart plug concentrator 200 and performs communication with other smart plug devices.

The embedded CPU module 120 controls the overall operation of the smart plug device 100 and uses the energy usage data of the load device 300 collected by the energy metering module 110, The on / off state of the load device 300 can be controlled according to the energy consumption of the load device 300.

In addition, the embedded CPU module 120 has a serial communication interface and can provide a serial communication control function for processing energy usage data and control messages in a low-power and low-operation operating environment. That is, the serial communication control apparatus and method according to the present invention can be implemented in an embedded CPU module 120 having a serial communication interface.

2 is a diagram schematically illustrating a configuration of a serial communication control device. The serial communication control device 20 of FIG. 2 performs a packet processing procedure for assembling and dividing a packet using a special field, in order to control serial communication of the smart plug device 100.

2, the serial communication control device 20 includes an interrupt processing unit 21, a buffer processing unit 22, a reception function processing unit 23, and a transmission function processing unit 24.

The interrupt processing unit 21 analyzes serial data received through the serial port 10 on a byte-by-byte basis to form a packet unit. In the embedded system of low power and low cost, since the serial data received by the buffer unit is difficult to be processed by the upper application software, the interrupt processing unit 21 can directly access the interrupt service routine (ISR) And analyzes the received serial data to form a packet unit.

The buffer processing unit 22 classifies received data configured in units of packets into message types and stores the received data as buffer data in the form of a packet column.

The reception function processing unit 23 extracts the actual data from the buffer data in the form of a packet column, and delivers the extracted actual data to the application program via the application program interface (API) For example, an upper application program calls the application program interface 30 using a function as a function, and the receive function processor 23 can search the buffer and transmit actual data to an upper application program according to the call.

The transmission function processing unit 24 packet-processes the transmission request data of the application program according to the transmission request of the application program transmitted through the application program interface 30 and transmits the data to the serial port 10.

FIG. 3 is a diagram schematically illustrating the configuration of the interrupt processing unit of FIG. 2. FIG.

3, the interrupt processing unit 21 includes an interrupt service routine 25, an S0 state processing unit 26, an S01 state processing unit 27, and a S02 state processing unit 28. [

The serial data received through the serial port 10 is transferred to the interrupt service routine 25.

The S0 state processing unit 26 checks the received data transmitted to the interrupt service routine 25 in units of bytes. That is, the SO state processing unit 26 confirms whether the received data in byte units is SOF (Start_Of_Frame), and in the case of SOF, transfers the control right to the S01 state processing unit 27 which is the next state.

SOF is used twice in succession to increase reliability. Thus, the S01 state processing unit 27 confirms whether the received data in byte units is SOF, and in the case of the SOF, the SOF is transmitted again and the data is considered to be normally started, and the control is transferred to the S02 state processing unit 28. [

The S02 state processing unit 28 collects the data in units of bytes until the EOF (End_Of_Frame) is received and processes it in a packet form.

If the SOF is not received, the S0 state processing unit 26 and the S01 state processing unit 27 determine that normal data reception has not been performed, and transfer the control right to the S0 state processing unit 26, which is the initial state.

Based on this state-based data control right processing method, since the start and end points of the data received in the serial can be accurately grasped and the packet processing is performed in the interrupt service routine 25, And low-end embedded systems can provide serial communication with high reliability and flexibility.

4 is a diagram for explaining a method of processing received data in the serial communication control apparatus of FIG. FIG. 4 is a flowchart illustrating a process of assembling received data in units of bytes by the serial communication control unit 20 illustrated in FIG.

Referring to FIG. 4, the received serial data is converted into a data format including TYPE and LEN by removing the SOF and EOF by the interrupt processing unit 21. Then, the buffer processor 22 examines the TYPE field and stores the received data by dividing the buffer according to the message type used in the smart plug device 100. The reception function processing unit 23 extracts actual data from each of the data of the packet type stored in this way.

5 is a diagram for explaining a method of processing transmission data in the serial communication control apparatus of FIG. 5 shows a transmission data processing procedure when a transmission message is transmitted, such as when an application program changes the energy metering cycle of the smart plug device 100 or performs a power on / off control for the connected load device 300 .

Referring to FIG. 5, the transmission function processing unit 24 called by the application program receives the information of the TYPE field and the LEN field in a parameter form, receives the user message in the form of transmission data, combines them, adds SOF and EOF And generates final transmission data. Then, the transmission function processing unit 24 transmits the generated transmission data through the serial port 10.

The receiving and transmitting function can be applied to the smart plug device 100 and the smart plug concentrator 200 interlocked with the serial communication interface and the transmitting and receiving function can be performed through the energy metering module 110 and the wired / wireless communication module 140 Can be implemented.

Meanwhile, the serial communication control method according to an embodiment of the present invention may be implemented in a form of a program command that can be executed through a variety of means for processing information electronically and recorded in a storage medium. The storage medium may include program instructions, data files, data structures, and the like, alone or in combination.

Program instructions to be recorded on the storage medium may be those specially designed and constructed for the present invention or may be available to those skilled in the art of software. Examples of storage media include magnetic media such as hard disks, floppy disks and magnetic tape, optical media such as CD-ROMs and DVDs, magneto-optical media such as floptical disks, magneto-optical media and hardware devices specifically configured to store and execute program instructions such as ROM, RAM, flash memory, and the like. The above-mentioned medium may also be a transmission medium such as a light or metal wire, wave guide, etc., including a carrier wave for transmitting a signal designating a program command, a data structure and the like. Examples of program instructions include machine language code such as those produced by a compiler, as well as devices for processing information electronically using an interpreter or the like, for example, a high-level language code that can be executed by a computer.

The hardware devices described above may be configured to operate as one or more software modules to perform the operations of the present invention, and vice versa.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention as defined in the appended claims. It will be understood that the invention may be varied and varied without departing from the scope of the invention.

10: Serial port
20: Serial communication control device
21:
22: buffer processor
23: Receive function processor
24: Transmission function processor
30: Application Interface

Claims (1)

A serial communication control device for performing a packet processing procedure for assembling and dividing a packet using a special field to control serial communication of a smart plug device,
An interrupt processing unit for analyzing serial data received through a serial port of the smart plug device by byte unit and structuring it in packet units;
A buffer processor for classifying received data configured in units of packets into message types and storing the received data as buffer data in a packet column; And
And a reception function processor for extracting actual data from the buffer data and transmitting the extracted actual data to an application program via an application program interface.

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