KR100427020B1 - Method of processing self diagnosis and program loop - Google Patents

Abstract

The present invention relates to a method of performing a self diagnosis function and a program in a digital television. In the digital television to which the present invention is applied, a processor (i.e., a microcomputer) performs a predetermined self-diagnosis function to facilitate maintenance, and when an error occurs in some peripheral integrated circuit elements and the error content is not fatal, By excluding the integrated circuit device and operating it, it is possible to prevent performance deterioration as a whole. In addition, the execution time of the main program loop is made constant to stabilize various control operations.

This configuration of the present invention comprises the steps of setting initial values of integrated circuit elements used in digital television; Checking an error state by communicating with integrated circuit elements having an initial value set; Setting a flag according to an error check result; Checking each bit of the flag to display a normal state if the corresponding integrated circuit devices are normal, to perform a main program loop, and to determine a state of an error if it is abnormal; And terminating if the state of the error is fatal, indicating that it is an executable error state if not fatal, and modifying the initially set value to bypass the error portion to perform a main program loop.

Description

Method of processing self diagnosis and program loop in digital television

The present invention relates to a method of performing a self diagnosis function and a program in a digital television.

In general, thanks to the development of semiconductor and processor technology, most home appliances are equipped with a processor for controlling the function of the entire system, and the processor operates according to a program in a ROM, and the like. It is supposed to control the function.

However, most home appliances have a problem in that they are difficult to maintain due to the fact that they do not have a self-diagnostic function even though they employ a processor (microcom). In particular, in the case of a microcomputer program, it repeats the process of executing a certain loop in the program and processing interrupts occurring in the middle of executing the loop. If an error occurs in a specific chip, it takes time to wait for a response from the chip. There is a problem in that the performance of the program is abnormal, and thus the performance of the entire system is degraded due to a partial failure.

Accordingly, the present invention has been proposed to solve the above problems, and an object thereof is to provide a method for performing a self-diagnosis function and a program in a digital television.

In order to achieve the above object, the method of the present invention comprises the steps of: setting initial values of integrated circuit elements used in a digital television; Checking an error state by communicating with integrated circuit elements having an initial value set; Setting a flag according to an error check result; Checking each bit of the flag to indicate a normal state when the integrated circuit devices are normal, to perform a main program loop, and to determine an error state if abnormal; And terminating if the error state is fatal, displaying an executable error state if not fatal, and modifying the set initial value to bypass the error portion to perform a main program loop, wherein the main program loop is executed. The loop starts a program execution timer and executes a plurality of subroutines according to a condition, and then checks the program execution time. If the execution time is greater than the set time, the loop resets the program execution timer and returns to the start of the program execution timer. The program loop is repeatedly executed, and if the execution time is less than the set time, the program execution is delayed by the time calculated by the difference between the set time and the execution time, the program execution timer is reset, and the program is returned to the start of the program execution timer. Can loop loop And it characterized in that.

1 is a block diagram showing the configuration of a general digital television;

2 is a flowchart illustrating a magnetic failure diagnosis procedure operating at power-on in accordance with the present invention;

3 is a flowchart illustrating a procedure of performing a program loop of a microcomputer according to the present invention.

* Explanation of symbols for main parts of the drawings

11: RF demodulation unit 12: channel decoding unit

13: Transport packet assembly and demultiplexer 14: Application decoder

15: display unit 16: clock reproduction unit

17: memory 18: processor

19: I / O

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

1 is a block diagram showing the configuration of a general digital television, Figure 2 is a flow chart illustrating a self-diagnosis procedure operating at power-on in accordance with the present invention, Figure 3 is a microcomputer performs a main program loop in accordance with the present invention It is a flowchart showing the procedure.

Referring to FIG. 1, a digital television receiver includes an RF demodulator 11, a channel decoder 12, a transport packet assembly and demultiplexer 13, an application decoder 14, a display 15, and a clock reproducing unit. 16, memory 17, processor 18, I / O 19 and the like.

In such a digital television receiver, each block is connected to the processor 18 via a bus, and a memory 17, an I / O 19, and the like are connected to the bus to participate in the operation of the processor 18.

In the digital television of this configuration, the procedure for self-diagnosing the abnormality of each of the peripheral integrated circuit elements when the processor 18 (called a microcomputer) is powered on is performed in steps 201 to 210, as shown in FIG. .

Referring to FIG. 2, in step 201, initial values of respective peripheral integrated circuit devices are set (i.e., initial settings), and in step 202, the peripheral integrated circuit devices are communicated to check for errors. In this case, the error check is performed by the microcomputer 18 accessing the peripheral integrated circuit device and responding thereto. If there is no response from the peripheral integrated circuit device, it is regarded as an error state. In step 203, a corresponding flag FLAG is set according to a response from the peripheral integrated circuit device. In step 204, the flag bit value is set to determine whether the corresponding peripheral integrated circuit device is normal. If it is determined in step 204 that the peripheral integrated circuit device is in a normal state, the normal state is displayed in step 205, and in step 206, the main program loop of the procedure as shown in FIG. 3 is performed.

As a result of the determination in step 207, if the error state is not normal (i.e., an error occurs), it is determined in step 207 whether the error state is fatal. Here, whether the error state is fatal or not is determined as a fatal error if there is no peripheral integrated circuit device, and if it is operable without the corresponding peripheral integrated circuit device, it is determined as an executable error state.

As a result of determining the error state in step 204, if it is an executable error state, it indicates that it is an executable error state in step 208, corrects the initial setting value in step 209, and then executes the main program loop in step 206.

If it is determined in step 207 that the error state is fatal, in step 210 the fatal error state is displayed and the process ends.

That is, in the operation of the present invention, first, peripheral ICs are checked in each program initialization process, and a flag of a related register is set according to whether there is an error, and each initial value selected in the initialization process with reference to the flag. Some modifications are made to ensure that the performance of the program is not affected by defective peripheral ICs. In addition, even when initialization is normally performed and a screen is displayed, the state of peripheral integrated circuit devices is periodically accessed to check for abnormalities. In this way, even in the execution of the normal operation, each time the main program loop is executed, it checks whether there is an abnormality, and sets a corresponding flag when the abnormal operation occurs more than a predetermined number of times and displays it.

The detailed procedure performed in the main program loop of step 206 consists of steps 301 to 309, as shown in FIG.

Referring to Fig. 3, in step 301, a program execution timer is started. In the present invention, the execution time of the program loop is made constant to stabilize the operation of the system. Each time the program loop starts, it starts the program execution timer.

Subroutine 1 to subroutine N are then performed. That is, the main program loop consists of a plurality of subroutines that perform a specific function in practice, and each subroutine is executed according to a condition, so that the execution time of the main program loop is not constant. In step 306, after completing the processing of each subroutine, the program execution time is checked and if the time is greater than the set time, the program execution timer is reset in step 309, and the steps 301 to 306 are repeated.

If the program execution time is less than or equal to the set time in step 306, the time to delay is calculated in step 307. The delay time is obtained by the difference between the setting time and the actual program execution time. And the set time is made in the initial value setting step 201 of FIG. In step 308, the program execution is delayed by the calculated delay time, the timer is reset in step 309, and the program loop is repeated from step 301 again.

In this way, in the coding of the microcomputer, a main program loop which essentially performs various operations is configured. In the method of performing the microcomputer, various methods are used to stabilize the operation. For example, there is a method of modularizing a program to operate each module sequentially, and configuring the module in one loop.

However, the operation of the present invention, as described above, checks the time taken while performing a normal program loop and delays the difference time depending on the system situation, thereby maintaining a constant time taken to execute the actual program. Can be.

As described above, the digital television to which the present invention is applied automatically diagnoses a failure of its own at power-on and informs the result, and if it is a non-fatal failure, it operates after excluding an incomplete part of the corresponding part. There is an advantage that it is easy to repair, and by making the execution time of the main program loop constant, it is possible to predict the program execution time and to ensure stable operation.

Claims (1)

Setting initial values of integrated circuit elements used in the digital television; Checking an error state by communicating with integrated circuit elements having an initial value set; Setting a flag according to an error check result; Checking each bit of the flag to indicate a normal state when the integrated circuit devices are normal, to perform a main program loop, and to determine an error state if abnormal; And Terminating if the error state is fatal, indicating that the error state is executable if not fatal, and performing a main program loop after bypassing the error part by modifying the set initial value, The main program loop starts a program execution timer, performs a plurality of subroutines according to a condition, and then examines a program execution time. If the execution time is greater than the set time, the program execution timer is reset and the program loop is returned to the start process of the program execution timer to repeat the program loop. If the execution time is less than the set time, delay the program execution by the time calculated by the difference between the set time and the execution time, reset the program execution timer and return to the start process of the program execution timer to repeat the program loop Self-diagnosis and program execution method in digital television.