JPH04294432A - Electronic apparatus controlled by built-in microcomputer - Google Patents

Abstract

PURPOSE:To easily seek the cause of abnormal operation and to easily obtain its counterplan by storing the execution order of respective moduled control procedures controlled by a built-in microcomputer and tracing control history at the time of occurrence of abnormal operation. CONSTITUTION:Prior to the start of execution of respective moduled control procedures for the built-in microcomputer by a prescribed procedure, the start addresses of the same modules are successively stored in a prescribed memory area constituted of a ring memory, and at the time of inputting a remote control signal having a prescribed code or inputting a key, the data stored in the memory are successively read out from the one next to the finally stored address in the reverse order and outputted from an output terminal through an output port.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control method for storing the execution order of each modularized control procedure of an electronic device controlled by a built-in microcomputer, and making it possible to trace control operations before an abnormal operation occurs.

0002

2. Description of the Related Art A plurality of modularized control procedures of an electronic device whose operation is controlled by a built-in microcomputer are simply executed sequentially according to a predetermined procedure.

0003

[Problem to be Solved by the Invention] During the development stage of control equipment based on the modularized control procedures, abnormal operations that occur only when the same control procedures are executed in a specific combination order rarely occur and It was difficult to reproduce and find the cause. The present invention stores the execution order of control procedures for each module in a memory, reads out the same history storage when an abnormality occurs, and traces the order of executed control procedures.
This makes it easier to discover the cause of abnormal operation and take countermeasures.

0004

[Means for Solving the Problems] Before starting execution of each modularized control procedure of an embedded microcomputer according to a predetermined procedure, the start address of the module is sequentially stored in a predetermined memory area having a ring memory configuration, In response to a remote control signal or key input of a predetermined code, the stored data is sequentially output from the last stored address to the next address in the same memory area via the output port.

[0005]

[Operation] In the main part block diagram of the electronic device 10 shown in FIG. It decodes the signal, executes specified control using the same signal, and outputs the corresponding control signal 14. When reading the input signals of the control unit 12, the control operation of the main control routine shown in FIG. 2 that is being executed is interrupted, and the interrupt request signals generated from each input signal are checked as shown in FIG. It executes the process corresponding to the signal that generated the interrupt request signal, turns on the corresponding signal flag, and returns to the interrupted control operation.

In the loop of the main control routine shown in FIG. 2 which has returned after completing the interrupt control routine shown in FIG. Execute the corresponding control procedure. In the main control routine, each signal flag is
3 before confirming N and executing the corresponding control procedure.
As shown in FIG. 2, the storage start address of the read-only memory (ROM) in the control unit 12 of the same control procedure is stored in a memory area set as a part of the memory (RAM) in the control unit 12, and the memory area is Increments the contents of a pointer that points to the next storage location within.

If the address in the memory area specified by the gradual increase in the contents of the pointer exceeds the set memory area, the start address of the memory area is set to the same pointer, and the old stored data is replaced with new data. It has a ring memory-like configuration that stores a predetermined capacity of the latest data that is rewritten in the memory area, and stores the latest processing history of the number of steps corresponding to the capacity of the memory area.

[0008] In response to a specific code operation signal output from the remote control transmitter 17 or the key input unit 11, the control unit 12 sequentially sequentially stores data in the memory area from the address specified by the pointer according to the processing procedure of the signal. By reading out the data, the oldest data stored in the same memory area is output via the output port 15 connected to the control unit 12, and is output to a printer or display device (not shown) connected to the output terminal 16 of the port output. indicate.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the main block diagram of a microcomputer-controlled electronic device shown in FIG. 1, a remote control signal code corresponding to a key operated by a remote control transmitter 17 is generated, and a remote control signal modulated with the code is output. The remote control signal receiving unit 13 of the electronic device 10 that receives the remote control signal demodulates the signal, supplies the output digital signal to the control unit 12, and also sends an interrupt request signal generated from the signal to the control unit 12. supply to. Similarly to the remote control signal, an operation signal outputted by a key operation of a key input section 11 provided in the electronic device 10 is also supplied to the control section 12 together with an interrupt request signal generated from the signal.

The control unit 12 to which the interrupt request signal is input interrupts the control procedure being executed and executes the control procedure of the interrupt routine shown in FIG. That is, the input signal and the input interrupt request signal are checked in a predetermined order, the respective control procedures are executed according to the input that has the same interrupt request, and the flag of the related control processing request is turned ON. . After executing the control procedure for which the interrupt request signal was issued, the control operation of the interrupt routine is terminated, and the control procedure returns to the interrupted control procedure and resumes execution of the same control procedure.

According to the main routine control procedure summarized in the example of the television receiver shown in FIG. 2, the control section 12 sequentially checks each flag of the control processing request, and executes the subroutine control procedure for which the flag is in the ON state. do. Prior to execution of a subroutine in the control unit 12, the storage start address of the subroutine to be executed is stored in a memory area of a predetermined capacity set in the memory within the control unit 12, and the next storage location within the same memory area is stored. Gradually increments the contents of the pointer that specifies .

FIG. 3 shows how the history of the subroutines to be executed is stored. That is, the storage start address of the processing routine to be executed next after being stored in the read-only memory in the control unit 12 is stored in the position specified by the pointer in the memory area. Subsequently, the contents of the pointer are gradually increased, and when the address of the memory in the control unit 12 specified by the contents of the pointer exceeds the memory area, the start address of the memory area is stored in the pointer.

[0013]

Effects of the Invention By storing the storage start address of the control procedure to be executed in the read-only memory before executing each control procedure in the modularized functional unit as described above,
It is possible to understand the history of control operations that lead to abnormal operation,
Program errors that occur when a specific combination of modularized control procedures of subdivided functional units are also easily discovered.

[Brief explanation of drawings]

FIG. 1 is a block diagram of main parts of an electronic device according to the present invention.

FIG. 2 is a flowchart of a main control routine of the electronic device of the present invention.

FIG. 3 is a flowchart of history storage of a processing subroutine.

FIG. 4 is a flowchart of an interrupt control routine of the electronic device of the present invention.

[Explanation of symbols]

10 Electronic equipment 11 Key input section 12 Remote control signal receiving section 13 Control section 16 Output terminal 17 Remote control transmitter

Claims (1)

[Claims] Claim 1: A specified control operation is performed by an operation signal output from a remote control transmitter or a key input section via a remote control signal receiving section, and a plurality of modularized control procedures are appropriately selected and executed according to a predetermined procedure. An electronic device controlled by an embedded microcomputer is equipped with a digital data output terminal in a predetermined format, and before the start of execution of each control procedure module, the start address of each control procedure module is sequentially stored in a memory area configured as a ring memory, and a predetermined data output terminal is provided. An electronic device controlled by a built-in microcomputer, characterized in that, in response to a remote control signal or key input, stored data is sequentially output from the same output terminal to an address next to the last stored data in the same memory area.