WO2009136731A2

WO2009136731A2 - Clock generation method, an identifier issuing method and a data acquisition method

Info

Publication number: WO2009136731A2
Application number: PCT/KR2009/002377
Authority: WO
Inventors: 공경식
Original assignee: 주식회사 테라칩스
Priority date: 2008-05-08
Filing date: 2009-05-06
Publication date: 2009-11-12
Also published as: WO2009136731A3

Abstract

The present invention relates to a method for generating a clock for communication between a controller generating and outputting communication data and a device receiving the communication data from the controller, the method comprising: the controller assigning communication-clock generation command information in a communication protocol to output communication data; the communication data-receiving device counting the number of clocks generated from a built-in clock generator, while receiving the communication-clock generation command information; the device dividing the number of clocks counted by a fixed value; and the device producing a communication clock by using a resulting value from the division. The present invention is advantageous in that communication speed related information can be assigned in a part of the communication protocol, without the use of a precision clock generator, so as to generate a communication clock in an effective way to attain accurate communication.

Description

How to generate a clock, how to grant an identifier, and how to obtain data

The present invention relates to a method for generating a clock, a method for providing an identifier, and a method for acquiring data, and more particularly, to a method and apparatus for generating a clock for communication between a controller for generating and outputting communication data and a device receiving communication data from the controller. A method of giving an identifier and a method of obtaining data of a particular device.

1 is a conceptual diagram illustrating a connection form between a controller and each device, the controller 110 having a function of generating and outputting communication data and analyzing received state information, and receiving and operating communication data from the controller 110. And

devices

120A, 120B, 120C, and 120D for transmitting status information. The

devices

120A, 120B, 120C, and 120D herein refer to lighting devices that operate under the control of the controller 110. These

devices

120A, 120B, 120C, and 120D are referred to as respective input ports ( in series) and the output port (marked as 'out' in the figure). At this time, the output port (out) of the last device (120D) is connected to the input port (in) of the controller 110. When the controller 110 does not implement a function of reading a state value of a specific device, the last device 120D and the controller 110 do not need to be connected.

On the other hand, in order to convey essential information, transmit specific option change information, or read the status of a device in a serially connected device, a unique identifier must be given to each device. The communication protocol consisting of the data according to this should be defined in advance. Also, in order to communicate properly, information about the speed at which communication is to be made must be defined in advance.

And, if you want to deliver the desired information to each device using the communication protocol in the serially connected devices, the communication speed must be defined in advance and the desired information must be delivered according to the speed. However, in order to support this, there is a problem in that a high cost is required by installing a precise clock generator that operates constantly regardless of the external environment (temperature, operating voltage, product error, etc.).

In addition, in general, a method of giving a unique identifier must insert a nonvolatile memory into each device to program before the product is applied. Alternatively, instead of configuring nonvolatile memory, you can configure multiple input ports and program the input ports before they can be applied. However, this method has problems in terms of cost of configuring non-volatile memory or multiple input ports and product management of how to program.

Accordingly, the present invention is to solve the above problems, in the serially connected devices, each device generates a clock so that it can correctly communicate without installing a precise clock generator that operates constantly regardless of the external environment To provide a method, to provide a unique identifier for each device without configuring nonvolatile memory or multiple input ports, and to provide a method for effectively obtaining data from a specific device. There is this.

In order to achieve the above object, a clock generation method according to the present invention is a method for generating a clock for communication between a controller for generating and outputting communication data and a device receiving communication data from the controller, the communication in the controller Allocating clock generation command information to a communication protocol to output communication data; Counting the number of clocks generated from a built-in clock generator while receiving communication clock generation command information in a device receiving communication data; Dividing the counted clock number by a fixed value in a device; And generating a communication clock using the divided result in the device.

In addition, in order to achieve the above object, the identifier providing method according to the present invention, the controller for generating and outputting the communication data and the device in a plurality of devices connected side by side so as to sequentially transmit the communication data input from the controller CLAIMS 1. A method for assigning an identifier, comprising: assigning identifier information and identifier information about a identifier to a communication protocol in a controller and outputting communication data; In the device receiving the communication data, the communication state is stopped, the information on the identifier is set as the identifier of the identifier, and the communication data including the identifier confirmation command information and the information on the identifier added or subtracted from the fixed value is confirmed. And outputting to the device.

In addition, in order to achieve the above object, a data acquisition method according to the present invention, a controller for generating and outputting communication data, and a specific device in a plurality of devices connected side by side to sequentially transmit communication data input from the controller CLAIMS 1. A method of obtaining data, comprising: assigning status value transfer command information and specific device information to a communication protocol at a controller and outputting communication data; Outputting communication data including a state value at the specific device when the device is identified as the specific device; And obtaining a state value of a specific device in the controller.

Herein, the data acquisition method may determine whether or not a specific device is provided after assigning an identifier to the device by the identifier providing method.

According to the present invention, it is possible to efficiently generate a communication clock and communicate accurately by allocating information on a communication speed to a part of a communication protocol without having a precise clock generator, and without configuring a nonvolatile memory or multiple input ports. Also, the identifier can be automatically assigned by assigning identifier assignment command information to a part of the communication protocol, and the information of a specific device can be obtained and effectively controlled by assigning the status value transfer command information to a part of the communication protocol. .

1 is a conceptual diagram illustrating a connection form between a controller and respective devices.

2 is a block diagram of an apparatus according to the invention.

3 is a communication protocol diagram for a command for transferring information from a controller to a device according to the present invention.

4 is a structure of a communication protocol used in the present invention.

5 is a flowchart of a clock generation method according to the present invention;

6 is a detailed flowchart of FIG.

7 is a structural diagram of all information except a delimiter in a communication protocol used in the present invention.

8 is a communication protocol diagram for an identifier providing command according to the present invention.

9 is a flowchart illustrating a method for assigning an identifier according to the present invention.

10 is a communication protocol diagram for a data acquisition method according to the present invention.

11 is a flowchart of a data acquisition method according to the present invention.

Hereinafter, with reference to the accompanying drawings will be described in detail the present invention.

2 is a block diagram of an apparatus according to the present invention, FIG. 3 is a communication protocol diagram for a command for transferring information from a controller according to the present invention, FIG. 4 is a communication protocol structure diagram used in the present invention, and FIG. Flow chart of a clock generation method according to the present invention, Figure 6 is a detailed flowchart of FIG. 7 is a structural diagram of all information except the delimiter in the communication protocol used in the present invention.

As shown in FIG. 2, the apparatus includes a device unit 160 that performs a predetermined original function, a communication protocol controller 170 that analyzes, manipulates, and processes communication data received from the controller 110, and a clock that generates a clock. Generator 180 and a communication clock generator 190 for generating a communication clock. The communication protocol controller 170 analyzes the received communication data according to a predefined communication protocol and outputs a control signal according to the defined command. That is, an operation command is instructed to the device unit 160, and a communication clock generation command is instructed to the communication clock generator 190. In addition, the device unit 160 receives a state value. The clock generator 180 generates a clock that is not precise but is much faster than the communication speed. The communication clock generator 190 analyzes the communication data received when the communication clock generation command is received from the communication protocol controller 170 to generate a communication clock.

In FIG. 3, an output port (out) of the controller 110 and communication data exchanged between the input port (in) and the output port (out) of the

devices

120A, 120B, 120C, and 120D are shown. The horizontal line is the time axis and shows two

communication data

130A and 130B (indicated by 'frame' in the drawing) when time passes to the right. The communication data frame in FIG. 3 shows a command for transmitting information to a specific device. Each communication data frame consists of a header (hereinafter referred to as 'header') and a message (denoted as 'message' in the drawing). There is a delay depending on the network condition from the output port (out) of the controller 110 to the input port (in) of the first device (120A), and communication from the input port (in) to the output port (out) of the device (120A) There is a delay according to the protocol control unit 170. In the case of general data transmission to the

devices

120A, 120B, 120C, and 120D, there is almost no delay as shown in FIG. 3, and there is a delay of one data length when a status value is transmitted to the controller 110 or an identifier is given. Occurs. A similar delay follows each time through each port repeatedly.

As shown in FIG. 4, the communication data frame 130 includes a header and a message, and the header includes a delimiter 150 (indicated as 'break' in the drawing). Information 140A on the communication speed (indicated by 'sync' in the figure). The message is composed of a data length 140B (denoted as 'length' in the figure), a data type 140C (denoted as 'identifier' in the figure), and

actual data

140D, 140E, and 140F. It is composed.

The delimiter 150 is defined as a continuous zero of a given length as a signal indicating that a new communication protocol is started. This zero length determines the tolerance of the clock generator 180 of each of the

devices

120A, 120B, 120C, 120D. For example, if the length of zero is at least 52 as the reference communication clock and each of the

devices

120A, 120B, 120C, and 120D detects at least 25 zeros with the previously set communication clock, the tolerance of the clock generator 180 is +/- 30%.

Information about the communication speed 140A is information on the communication speed to determine the communication speed during this period. Data length 140B has information about the length of data that follows, and data type 140C has information about the type of data that follows. This data type 140C is a command for what to do.

A clock generation method according to the present invention will be described with reference to FIG. 5 as follows. First, the controller 110 allocates communication clock generation command information to a communication protocol to output communication data (S110). Then, the device 120A receiving the communication data counts the number of clocks generated from the built-in clock generator 180 while receiving the communication clock generation command information (S120). Finally, the device 120A divides the counted clock number by a fixed value, and then generates a communication clock using the divided result value (S130) (S140).

Referring to Figure 6 as follows. Information about the communication speed (140A) is always 55h (AAh in case of transmission from the upper bit), there are a total of four 1 to 0 (or 0 to 1). The communication protocol controller 170 of each of the

devices

120A, 120B, 120C, and 120D issues a communication clock generation command during this period, and the communication clock generator 190 switches four times from 1 to 0 (or 0 to 0). The number of clocks received from the clock generator 180 during the conversion to 1). Thereafter, the number of clocks counted above is divided by a predetermined value (divisor), and the communication clock is inverted for each clock as much as the quotient and transferred to the communication protocol controller 170. If you are sampling once for one bit of communication data, set the divisor to 4; if you are sampling twice, set the divisor to 8; if you are sampling three times, set the divisor to 12. That is, it is set to a multiple of 4 of the number of times to sample for one bit.

In the case of FIG. 7, each of the

information

140A, 140B, 140C, 140D, 140E, and 140F includes 11 bits in case of 1 byte of data. The first bit is the start signal, which is always zero. For reference, the status of communication data is normally 1. It consists of eight bits of data, one parity bit, and an end bit that is always one.

8 is a communication protocol diagram for an identifier providing command according to the present invention, and FIG. 9 is a flowchart illustrating an identifier providing method according to the present invention.

In the case of Figure 8, the output port (out) of the controller 110 for the command to automatically assign an identifier, the input port (in) and output port (out) of each device (120A, 120B, 120C, 120D) Shows communication data to and from. Similar to the communication protocol shown in Fig. 4, it includes delimiters, information on the communication speed, and data length.

A method of automatically assigning a unique identifier without a nonvolatile memory or multiple input ports according to the present invention will be described with reference to FIG. 9. First, the controller 110 assigns an instruction to give an identifier to 140C, which is information on the type of data, and allocates information about the initial value of the identifier to 140D, which is actual data information, to output communication data (S210). Then, the first device 120A stops the communication state by fixing the communication data to 1 as opposed to the general data transmission shown in FIG. 3 immediately after receiving the command (located at 140C) to give an identifier (S220). Subsequently, the terminal receives information (located at 140D) regarding the following identifier to be set as its own identifier (S230).

Then, the communication data including the identifier assignment command information and the information about the identifier determined by adding or subtracting a fixed value from the set identifier thereof is outputted to the second device 120B (S240). For example, information about an identifier may be calculated by adding or subtracting a fixed value 1 from its identifier. In the case of the second device 120B, the communication data is fixed to 1 immediately after receiving the command (positioned at 140C) to feed back to step S220 to give an identifier, and stops the communication state. ), It sets it as its own unique identifier, and then outputs the communication data including information about the confirmed identifier calculated by adding or subtracting a fixed value from the established own identifier to the third device 120C.

By repeating this operation, the information about the identifier 140D is continuously added or decremented as the device passes through each of the

devices

120A, 120B, 120C, and 120D, and each

device

120A, 120B, 120C, or 120D is transmitted. Sets the unique identifier (located at 140D) about the added identifier as its own identifier. If a total of N devices are connected, a fixed value of (N-1) is added to the input port (in) of the last device (120D) and assigned to the 140D. In addition, the last device 120D outputs the controller 110 by adding or subtracting the last fixed value to the controller 110 so that the controller 110 can recognize how many devices are connected in total.

10 is a communication protocol diagram of a data acquisition method according to the present invention, and FIG. 11 is a flowchart illustrating a data acquisition method according to the present invention.

In the case of Figure 10, the output port (out) of the controller 110 for the command to obtain the data of a particular device, the input port (in) and output port (out) of each device (120A, 120B, 120C, 120D) ) Shows communication data. Similar to the communication protocol shown in Fig. 4, it includes delimiters, information on the communication speed, and data length.

Referring to Figure 11 describes a method of obtaining data of a specific device according to the present invention. First, the controller 110 assigns a command to deliver a status value to 140C, which is information on the type of data, and outputs a unique identifier of a specific device for which data is to be obtained, to 140D, which is actual data information, and outputs it (S310). .

In addition, if it is confirmed as the specific device, the corresponding specific device outputs communication data including the state value, and accordingly, the controller 110 obtains the state value of the specific device (S320) and (S330). Herein, the data acquisition method may determine whether or not a specific device is provided after assigning an identifier to the device by the identifier providing method.

A detailed example will be described with reference to FIG. 10 as follows. In FIG. 10, the unique identifier of a particular device refers to device 120B as 2.

Devices

120A, 120C, and 120D that receive this communication data but do not coincide with the unique identifier maintain normal data transmission as shown in FIG. 3. However, the device 120B, which matches the unique identifier, maintains normal data transmission as shown in FIG. 3 until the unique identifier 140D is input, but when the unique identifier 140D is input, its state The value is appended to the communication data by the number of data length minus 2. That is, all devices 120A located before the device 120B matching the unique identifier 140D output the communication data up to the unique identifier 140D, and the device matching the unique identifier 140D. All

subsequent devices

120B, 120C, and 120D, including this, output communication data including the state value of the specific device 120B. Accordingly, the controller 110 obtains the state value of the specific device 120B.

Meanwhile, although the clock generation method, the identifier providing method, and the data obtaining method according to the present invention have been described according to a limited embodiment, the scope of the present invention is not limited to the specific embodiment, and the present invention has ordinary knowledge in connection with the present invention. Many alternatives, modifications and variations can be made without departing from the scope of the disclosure.

Claims

A method of generating a clock for communication between a controller for generating and outputting communication data and a device receiving communication data from the controller,

Assigning, by the controller, communication clock generation command information to a communication protocol to output communication data;

Counting the number of clocks generated from a built-in clock generator while receiving communication clock generation command information in a device receiving communication data;

Dividing the counted clock number by a fixed value in a device;

And generating a communication clock using the divided result value in the apparatus.
A method of assigning an identifier to a controller for generating and outputting communication data and a device in a plurality of devices connected side by side to sequentially transmit communication data input from the controller,

Allocating identifier identification command information and information on the identifier to a communication protocol in a controller and outputting communication data;

In the device receiving the communication data, the communication state is stopped, the information on the identifier is set as the identifier of the identifier, and the communication data including the identifier confirmation command information and the information on the identifier added or subtracted from the fixed value is confirmed. And a step of outputting to the device.
A method for obtaining data of a specific device from a plurality of devices connected side by side so as to sequentially transmit communication data inputted from the controller and a controller for generating and outputting communication data,

Assigning state value transfer command information and specific device information to a communication protocol and outputting communication data in a controller;

Outputting communication data including a state value at the specific device when the device is identified as the specific device;

And obtaining a state value of a specific device from the controller.
The method according to claim 3, wherein the data acquisition method,

The method for acquiring data according to claim 2, wherein the device is confirmed whether or not a specific device is provided after the device is assigned an identifier.