KR950013626B1 - Controlling method of computer-controlled tv receiver through communication port - Google Patents

Abstract

recording data inputted in an address area of a defined memory device, if a set mode of a microcomputer is set as a data writing mode to the memory device connected to a bus, and if the input data to be stored in the memory device or a storing address is not well defined, transmitting an error message to an external control unit; in the case where the input data is a non-performance command, if the address is well defined, informing the input data is data to be stored, but if the address is not defined, setting a flag for informing the address has been inputted; in case where a current set mode is a data reading mode from the memory device or a RAM data reading mode of an internal microcomputer of TV, if the address is well defined, reading the data from the address of the memory device or reading data from the RAM of the microcomputer to output the data to the external control unit, but if the address is not defined, outputting the error message to the external control unit; and in the case where a mode set flag value is a direct control mode for the operation of components connected to internal bus of TV, designating a data transmitting regulation with the external control unit in a mode designated by the input data value, and if the input data does not correspond with the above all conditions, outputting the error message to the external control unit.

Description

External control method of computer control TV receiver

1 is a circuit diagram of a conventional TV receiver bus system.

2 is a circuit diagram to which the external control method of the computer control TV receiver of the present invention is applied.

3 is a detailed view of a serial data transmission and reception interface unit in FIG.

4 is a control flowchart according to the external control method of the computer control TV receiver of the present invention.

* Explanation of symbols for main parts of the drawings

1: micom 2: remote control signal receiver

3: keyboard 4: station selection

5: PIP processing unit 6: memory element

7 chroma processing unit 8 deflection processing unit

9: voice processing unit 10: serial data transmission and reception interface unit

10-1: Bidirectional Buffer 10-2: Interface Unit

10-3: Address buffer 10-4: Connector

11: External controller X: Internal register

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bus control TV receiver, and more particularly, to an external control method of a computer receiver suitable for displaying a function call of a TV receiver, a status check on an internal circuit, and performing control from the outside on a screen.

The TV receiver circuit generally used is composed of a microcomputer that controls the entire system of the internal system and a peripheral circuit controlled by the microcomputer, and when a user calls a specific function among many functions provided by the television, the microcom receives a command from the user. In order to interpret and execute the appropriate command, it selects a suitable peripheral circuit and executes a control command through the system bus. The control using this bus is accompanied by the development of an integrated circuit (IC) that performs such a function. It is a general trend.

In this regard, a bus system in a conventional TV receiver, which is generally used in this regard, includes a remote control signal receiver 2 for remotely controlling various functions of the TV as shown in FIG. 1 and a TV receiver through key input. A keyboard 3 for inputting a command from a user to perform control of a specific function of the user, and a command for a TV receiver from the user through the keyboard 3 or the remote control signal receiver 2 and input the command. A microcomputer 1 which analyzes and controls a peripheral circuit to perform a designated command, and a peripheral circuit electrically connected to the microcomputer 1 through an internal bus to perform a unique function according to a control command, that is, a memory element ( The chroma processing unit 7 and the audio processing unit 9 which read out various video and audio data stored in 6) through a bus and process them. And a deflection processor 8 for adjusting deflection in scanning of the video signal, and a PIP (Picture In Picture) processor 5 for outputting a message by configuring another screen in the screen of the TV. do.

Referring to the operation and problems with respect to the general bus control TV receiver configured as described above in detail as follows.

First, a user inputs a command through a remote control signal receiver 2 or a keyboard 3 when calling a specific function or performing other control with respect to the TV receiver. In this case, the user's command input from the microcomputer 1 is input. In order to interpret and execute the command, the control command is applied to each part connected to the bus through the bus to execute an operation according to the user's request, and to send and receive the desired data.

However, the above method has many problems. As an example, the means for controlling the operation of various integrated circuits connected to the bus in the TV receiver is limited to the microcomputer 1, so that the integrated circuits controlled by these buses There is no means for directly checking externally without passing through the internal microcomputer 1 or for changing an error of data stored in the internal storage element by using an external control device.

That is, to check or control the circuit inside the TV receiver, it must be performed through the microcomputer 1 inside the TV receiver, and there is no method of performing the above functions directly from the outside without using the internal microcomputer 1. Or service-men have no way of knowing information about their operating states and no way to control integrated circuits controlled on the bus.

Accordingly, the present invention, in view of the above-described deficiencies according to the prior art, constitutes a configuration of a serial data transmission interface such as RS-232C and a part connecting the microcomputer with a data and address buffer, and an external controller and a microcomputer. It was invented for the purpose of providing a means for controlling the operation of the microcomputer by an external controller by setting the transmission protocol between the two, and will be described in detail with reference to the accompanying drawings.

The circuit applied to the method of the present invention includes the conventional TV receiver of FIG. 1, that is, the basic configuration of the remote control signal receiver 2 for remotely controlling various functions of the TV as described above, and a keyboard ( 3) and the microcomputer 1 for inputting a command for the TV receiver from the user through the keyboard 3 or the remote control signal receiving unit 2 and interpreting the command to control the surrounding times to perform a designated command, and A tuner 4, a PIP processor 5, a memory element 6, a chroma processor 7, which is a peripheral circuit electrically connected to the microcomputer 1 via a bus and performing a unique function according to a control command; In the TV receiver circuit composed of the deflection processing unit 8 and the voice processing unit 9, a direct data transmission / reception interface unit 10 is connected between the microcomputer 1 and the external controller 11 to connect the external controller 11. from The command is transmitted to the microcomputer 1 through the serial data transmission / reception interface unit 10, and the microcomputer 1 controls the peripheral units connected on the bus according to the command and receives the data received therefrom. This is again output to the external controller 11 through the serial data transmission and reception interface unit 10 is configured to determine the state of the TV receiver from the outside or to directly control.

On the other hand, the serial data transmission and reception interface unit 10 as shown in Figure 3, the read / write control signal of the microcomputer 1 ( Receive data from the external controller 11 and output to each part on the internal bus or output data to the external controller 11 and the bidirectional data buffer 10-1 and output enable control. An address buffer 10-3 for receiving and outputting an address signal, an interface unit 10-2 for interfacing with the data buffer 10-1 and the address buffer 10-3, and the interface unit ( 10-2) is configured as a connector (10-4) for connecting to the external controller (11).

An external control method, operation, and effect made by the circuit of the present invention configured as described above will be described in detail with reference to the flowchart of FIG. 4.

First, in order to explain the operation mode of the present invention, the operation mode and data transmission format of the microcomputer 1 will be described. When the mode flag is used as a flag for informing the operation state of the microcomputer 1, According to the value of the mode flag

modef = 0: normal mode

modef = 1: mode for writing to the memory device

modef = 2: mode for writing data of memory device

modef = 3: mode for reading the contents of RAM

modef = 4 is defined as a mode for writing data on the bus (ie, a mode for controlling various integrated circuits) and is a transmission format for data transmission between the external controller 11 and the microcomputer 1.

1: A, adl, dal, Ex: Transfer format for writing data to memory device

2: B, adl, Ex: Transmission format for reading data from memory device

3: C, adl, Ex: Transmission format for writing RAM contents

4: D, adl, ad2, dal, Ex: Transmission format for writing data on the bus

The protocol of data transmission and reception can be defined in the form of.

In the transmission format, A, B, C, and D designate the operation inside the microcomputer 1 to define what meaning the data to be next has, i.e., set the mode flag to the four modes described above. Is the mode selection data used for setting, adl is defined as the address of the storage element or the main address for each component on the bus, ad2 is defined as a sub-address, dal is defined as data, and Ex is defined as a microcomputer (1). Is a command to actually execute according to the data and mode previously entered, that is, it can be used to specify whether the data is data for execution before the Ex command is input. Referring to the above definition, the operation of the present invention will be described in detail with reference to the flowchart of FIG.

First, the microcomputer 1, which is an internal controller of a TV receiver, starts to execute a command according to a program stored therein in an initial state where power is applied, initializes peripheral circuits, and performs a series to perform a function related to the present invention. By applying the read control signal RD to the data buffer 10-1 of the data transmission / reception interface unit 10, the serial data output from the external controller 11 may be received through the serial data transmission / reception interface unit 10. It becomes possible. Therefore, the microcomputer 1 determines whether serial data is input through the serial data transmission / reception interface unit 10 (S1), and if so, stores the serial data in the internal register X (S2) and inputs the input. It is determined how the current mode flag is set to know what data is (S3, S4, S5, S6). If the current mode flag is in the normal mode (modef = 0) Is set to (S7, S8, S9, S10) by determining whether the data stored in the register X is the mode selection data (A, B, C, D) defined in the transmission format (S7, S8, S9, S10) According to this, the mode flag modef is set to the mode defined above (modef = 1, modef = 2, modef = 3, modef = 4) (S13, S14, S15, S16). On the other hand, in step S7 to S10, when the data is not the mode selection data A, B, C, and D, the write control signal (1) is transmitted to the serial data transmission / reception interface unit 10. ) Is set to the transmission state, and then an error is output to the external controller 11 through the serial data transmission / reception interface unit 10 (S11). After the step S11 and the steps S13 to S16, the address definition flag, the data definition flag, and the sub address definition flag are reset (S12), and the process returns to the step S1.

On the other hand, if the mode flag modef is set to the mode for writing to the memory element 6 (modef = 1) (S3), and the data stored in the register X is the execution data EX (S25). It is judged whether or not the data definition flag is set (S26). If not, the process returns to the step S11. If it is set, the data dal defined in the address adl of the previously set memory element 6 is set. Is stored (S27), and the process returns to the step S12.

On the other hand, in step S25, if it is not the execution data EX, it is determined whether the address definition flag is set (S28), and if it is set, the data stored in the register X is read and defined as data dal. After setting the data definition flag (S29), the process returns to the above step. If the address definition flag is not set, the data stored in the register (X) is read and defined as the address adl, and the address definition flag is set. Return to the step (1).

On the other hand, the mode flag modef is set to a mode for reading data from the memory element 6 (modef = 2) (S4) or a mode for reading RAM data in the microcomputer 1 (modef =). If it is set to 3) (S5), it is determined whether the data stored in the register 4 is execution data EX (S31), and if not, the data of the register X is not the execution data EX. Read to define as address adl, set address definition flag (S37), and then return to step S1, if execution data EX, determine again whether address definition flag is set (S32). If the address definition flag is not set at this time, the process returns to the step S11. If the address definition flag is set, it is again determined whether the mode for reading data from the storage element 6 (mode = 2f) is performed (S33). ), Where definition if mode (modef = 2) If the data is read from the address of the storage device 6 (S34), and if the mode (modef = 2) is not read (S36), the data is read from the defined RAM address (S36), and the serial data transmission / reception interface unit 10 is then read. After the output to the external controller 11 through the return to the step (S12).

On the other hand, in the above, the operation of each part connected with the mode flag on the internal bus, for example, the chroma processing unit 7, the deflection processing unit 8, the voice processing unit 9, or the PIP processing unit 5, etc. is directly performed. If the mode (modef = 4) for control is set (S6), it is determined whether the data stored in the register (X) is execution data (EX) (S17), and data is defined if execution data (EX). It is determined again whether or not a flag is set (S18), and if it is not set at this time, the process returns to the step S11, and if it is set, the data defined in the sub address ad2 of the defined address adl ( dal) is output via the bus (S19), the process returns to the step S12, and if the execution data EX is not the step S17, it is again determined whether the sub address definition flag is set (S20). Register if set Read the data of (X), define it as data (dal), set the data definition flag, and then return to the step S1. If the sub address definition flag is not set in the step S20, the address definition flag. Is again set (S22), and if it is set at this time, the data of the register (X) is read and defined as the sub address (ad2) and the sub address definition flag is set (S24), and the address definition flag is set. If not, the data in the register X is read and defined as the address adl, the address definition flag is set (S23), and after this step S23 or S24, the process returns to the step S1.

As a result, when A, adl, dal, and EX, which are transmission formats for writing data to the memory device 6, are sequentially input through the serial data transmission / reception interface unit 10, a mode flag is set by the A data. Set the mode to write (modef = 1), and then define the address adl of the memory element 6 and set an address definition flag, and then input the dal as data dal. And the data definition flag are set, and the data dal is stored in the address adl of the storage element 6 by the execution data EX input thereafter.

In addition, when B, ad1, and EX, which are transmission formats for reading data from the storage element 6, are sequentially input through the serial data transmission / reception interface unit 10, the mode flag is read by B. Set the mode (modef = 2), and define the adl input thereafter as the address adl of the memory element 6, set an address definition flag, and then execute the input data EX by the execution data EX. Data is read from the address adl of (6) and output through the serial data transmission / reception interface unit 10.

On the other hand, when C, adl, and EX, which are transmission formats for reading the contents of the RAM, are sequentially input through the serial data transmission / reception interface unit 10, a mode flag (modef) is read by the C to read the contents of the RAM. (modef = 3), the adl to be input is then defined as the address of the RAM (MDL), the address definition flag is set, and then the address of the RAM (adl) defined by the execution data (EX) input thereafter. Read the data from the) and outputs it through the serial data transmission and reception interface unit 10.

On the other hand, when D, adl, ad2, and EX, which are transmission formats for writing data on the bus, are sequentially input through the serial data transmission / reception interface unit 10, a mode flag (modef) is set by the D on the bus. Set the mode for writing (modef = 4), and then define the input adl as the address of the bus company (adl) and set the address definition flag, and then define the input ad2 as the sub address (ad2) and define the sub address. Set the flag, define the input dal as data (dal) and set the data definition flag, and then the sub-address (ad2) of the main address (AD1) on the bus defined by the input data (EX). Outputs the defined data da1, i.e., each part on the bus is selected by the main address ad1, and then the address of each selected part is supported by the sub address ad2. After it is determined, the data DA1 is input thereto to perform control.

Therefore, various components controlled by the bus in the TV receiver according to the present invention are not controlled by the internal microcomputer 1 of the TV via the serial data transmission / reception interface unit 10 but the external controller 11. By providing a control means by), the state of various components on the bus can be tested by the external controller 11, and it is easy to know when some of the various processing circuits connected on the bus are errors. Further development of the data transmission means between the microcomputer 1 and the external controller 11 of this type makes it possible to know the error of the microcomputer 1 program or the errors of the integrated circuits on the bus.

As described above, the present invention constitutes an interface unit for data transmission between a microcomputer that is a controller of a TV receiver and an external control means, and uses the same to control various integrated circuits controlled on the bus of the TV receiver, rather than a microcomputer. It provides a means to control by using the controller to provide the opportunity to communicate the status of various integrated circuits on the bus to an external controller and to test its function. It is easy to know that there is an effect that after-sales service becomes easy.

Claims (1)

If the setting mode of the microcomputer for TV control according to the input of the serial data is set to the mode for writing data to the memory device connected on the bus, and the data input from the external controller is a command for execution, the defined memory Recording the input data in the address area of the device, and if the input data or storage address to be stored in the memory device is not properly defined, sending an error message on the data transmission / reception format to an external controller, and the input data is not executed. In case of command, if the address is well defined, it indicates that the data is to be stored. If the address is not well defined, it sets a flag to indicate that the address has been entered. The currently set mode reads data from the memory. Mode for the internal or microcomputer's RAM data If the mode is set to read mode, if the address is properly defined for the inputted execution command, the data is read from the address of the memory device defined according to the current mode, or from the internal RAM defined. Output to an external controller and if the address is not defined properly, output an error message to the external controller, and directly control the operation of the components connected to the internal bus of the TV. In the case of the mode, the input data value designates a data transmission protocol with an external device. If the input data does not correspond to all the above conditions, an error message is output to an external controller. An external control method of a computer controlled TV receiver.