JPS63157240A - Digital control device - Google Patents

Abstract

PURPOSE:To shorten the time needed for production of an object program by executing a source program by an interpreter and at the same time converting the source program into an object program. CONSTITUTION:When an overall rise is given to a digital control device, an OS stored in an external memory 2 is automatically loaded into a memory area 31 exclusive for main arithmetic unit. Then a compiler-only OS and a compiler are loaded into a memory area 41 exclusive for secondary arithmetic unit. When a program debugging job is started, an interpreter is loaded into the area 31 from the memory 2. At the same time, a source program is loaded into a common memory 5 and carried out by the interpreter in a main arithmetic unit.

Description

DETAILED DESCRIPTION OF THE INVENTION <Field of Industrial Application> The present invention relates to a digital control device, and more specifically, to a digital control device that executes a control program for an automatic machine or the like.

<Prior Art> In the above-mentioned digital control device, when inputting a source program written in a high-level language such as Basic or Fortran, using only an interpreter is advantageous for debugging because it is an interactive format. The disadvantage is that it takes a long time to execute.

Further, if only a compiler is used, the execution time is shortened, but there is a drawback that debugging cannot be performed easily because the translation is performed all at once.

Therefore, an interpreter and a compiler are stored in the same storage device, and when the source program is modified, the interpreter is used for debugging, and when the source program is completed, the compiler is used to convert it all at once. It has been proposed (Japanese Unexamined Patent Publication No. 81-1185)
(See Publication No. 8).

According to this, the program is modified while debugging as appropriate using an interpreter, making it easier to create and modify the program. You can get the object program in no time.

<Problems to be Solved by the Invention> However, in the conventional example described above, after the program is completed, an object program must be created again using a compiler, which takes time.

<Object of the invention> This invention was made in view of the above problems,
It is an object of the present invention to provide a digital control device that can save time for creating object programs.

Means for Solving Problems> A digital control device of the present invention for achieving the above object includes a main processing unit that executes each stage of a source program by an interpreter, and a main processing unit that executes each stage of a source program by an interpreter, and The computer has an arithmetic device including a sub-arithmetic device that compiles programs.

With the digital control device described above, the source program is compiled by the sub-processing unit at each stage when the source program is executed by the main processing unit.
An object program based on the source program at each stage can be obtained. Therefore, immediately after the execution of the source program is completed, the object program corresponding to the finally completed source program is completed.

<Example> Hereinafter, embodiments will be described in detail with reference to the accompanying drawings showing examples.

Figure 1 shows an example of a digital control device.The digital control device includes an input/output device that exchanges signals with external equipment, and records and stores source programs, operating systems (OS), and object programs. an external storage device ■ that executes the source program using the interpreter, a main processing unit ■ that executes the source program using the interpreter, and a sub-processor that compiles the source program by identifying a predetermined execution flag (described later) after the interpreter starts executing the source program. It is constituted by a common storage device (2) that can be accessed from both the device (4), the main processing device (G) and the sub-processing device (4), and a bus (B) that connects these devices to each other.

The main processing unit G) and the sub processing unit (4) each have dedicated storage areas (31) and (41) (see Fig. 2), and the main processing unit dedicated storage area (31) includes: O81
An O81 compiler dedicated to the compiler is loaded into the storage area (41) dedicated to the interpreter and the sub-processing unit.

The common storage device ■ stores the source program and is also provided with a control area (51) (see Figure 3).The control area (51) contains the source program storage address, program size, and program information. Execution result,
Information such as compiler execution instructions and completion of compiler execution is temporarily stored. As mentioned above, the common storage device (■) can be accessed from both the main processing unit (G) and the sub-processing unit (4), so the interpreter and compiler can perform work using the same source program stored in the common storage device (G). It can be carried out.

The digital control device having the above configuration will be explained. When the entire device is started up, the O8 stored in the external storage device ■ is automatically loaded into the storage area dedicated to the main processing unit (31), and after this, the O81 dedicated to the compiler and the compiler are loaded into the storage area dedicated to the subprocessing unit (41). ) is loaded. When debugging the program is started, the interpreter is loaded from the external storage device (G) into the main processing unit exclusive storage area (31), and the source program is loaded into the common storage device (G). Execution is performed by an interpreter. In this case, since an interpreter is used, the program is executed at each stage of the source program.

The following procedure will be explained with reference to the flowchart (FIG. 4). The stage of the source program is represented by the symbol S,
Let the total number of stages be m. First, set S-1 (step ■
), when the first stage execution command is issued, the first stage is executed by the interpreter (step ■). At the time this execution instruction is issued, a compiler execution flag is set in the control area (51) (step ■). When the sub-processing unit ■ identifies this compiler execution flag, it compiles the source program at the relevant stage (step ■),
The corresponding object program is stored in an external storage device (step ①). Thereafter, when information indicating the program execution result is input to the control area (51), the compiler execution flag is reset (step ■). After this, in step ■, it is determined whether an error occurred during execution. If an error occurs, the interpreter corrects the source program, and returns to step ■, again.
Execute the modified S-stage program. If no error occurs, determine whether s - m, that is, whether all steps have been executed, and if not, add 1 to S to make s + 1, return to step Execute s+1 stages.

After returning to step ■, when an execution instruction is issued, the compiler execution flag is set in the control area (51) (step ■), and compilation is performed in the sub-processing unit (4) (step ■) . Then, if there is an object program previously stored in the external storage device (2), it is dynamically deleted and the latest compiled object program is stored (step (2)). In other words, compilation will be performed regardless of the quality of the execution result by the interpreter. After this, in the same way as above, reset the execution flag (step ■), check for errors (step ■), and determine whether it is s-m (
Step -〇). In step (2), if s-m, it means that all stages of program modification have been completed, and the procedure ends. As described above, even if an error occurs during execution, the program is compiled again based on the corrected program, so when a complete source program is finally completed, an executable object program can be stored in the external storage device. This means that a file has been created.

Note that the present invention is not limited to the above-mentioned embodiments. For example, when compiling a source program, if there is an error in the result of execution at that stage by the interpreter, compiling is not performed and the result is corrected again. After confirming that the data is correct, the next step may be to compile the relevant step. By doing this, the number of compilations can be kept to a minimum.

Various other design changes can be made without changing the gist of the invention.

<Effects of the Invention> As described above, in this invention, the source program is executed by the interpreter while being converted into an object program, so that the modification of the program using the interpreter is completed and the complete program is completed. At the same time, an object program created by a compiler can be dynamically obtained without requiring much time to create an object program, which is a unique effect.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of the digital control device, FIG. 2 is a diagram showing the storage area of the arithmetic unit, FIG. 3 is a diagram showing the storage area of the external storage device, and FIG. 4 is a flowchart.

Claims (1)

[Claims] 1. Memorize programs and data storage device and stored programs. An arithmetic unit that performs operations according to instructions. input for exchanging signals between the equipment and the outside. A digital control device consisting of an output device In this case, the arithmetic unit is an interpreter. Executes each step of the source program using The main processing unit that performs Compile the source program at this stage. Equipped with a sub-processing unit that piles up digital, which is characterized by being Control device.