JPH04111631U - Microcomputer program evaluation device - Google Patents

Abstract

(57) [Summary] [Purpose] When performing an evaluation operation using an evaluation microcomputer, the present invention stops access at an external memory address specified by the user, and otherwise runs the program in real time. The purpose of the present invention is to provide a microcomputer program evaluation device that can accurately evaluate a program. [Structure] According to the present invention, when performing program evaluation,
A break memory is provided that corresponds one-to-one with the address of the program memory, and break data is written to the address of the break memory that corresponds to the address at which access to the program memory is to be stopped. A program can be executed in real time from a certain address to a predetermined address, and it is effective for control objects where correct program evaluation cannot be performed unless the program is executed in real time.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The present invention relates to a microcomputer program evaluation device, and in particular, to a microcomputer program evaluation device. When evaluating data inside program memory using a microcomputer , access the program memory at the program memory address specified by the user. Regarding a microcomputer program evaluation device suitable for stopping a program .

0002

[Conventional technology]

Generally, a one-chip microcomputer has a A ROM in which program data for making the program is stored and read from the ROM. The processing data was written or read according to the result of decoding the program data. It has a built-in RAM for reading. Mass production of microcomputers here In this case, all program data stored in the built-in ROM is masked during manufacturing. Once the program data is written to ROM, the program is system data cannot be easily rewritten. In other words, a microcomputer Before mass production, it is necessary to evaluate the program data that should be written to the ROM. It becomes. For this reason, it is called an evaluation microcomputer without built-in ROM. There is an external memory that can be written to and read from (EPROM, etc.). Write the same program data as the program data to be stored in the ROM. Then, access each address of the external memory one address at a time. In other words, the program data in the external memory is executed one address at a time. , the program data at each address was evaluated independently. In other words, external After decoding the program data at one address of the memory and executing the specified operation, this execution Evaluate whether the row result is normal or not, and then repeat this operation to evaluate the program. was going on. Then, the program counter value is stored at the address specified by the user. After confirming the change, the program counter was stopped. This evaluation This method is called a step function.

0003

[Problem that the idea aims to solve]

However, the program evaluation operation of the evaluation microcomputer is limited to one address. Because it is performed step by step, the program-controlled object can be operated in real time. I can't do it. In particular, if the object to be controlled is operated in steps, the It is not possible to determine whether the target object is operating normally or not, i.e. the program is not working normally. Sometimes it is not possible to determine whether it is present or not. For example, the cylinder motor of a VTR When evaluating a program for the servo control of a If the servo is not processed at the time, the servo will not work properly, so the program cannot be evaluated correctly. Can not.

0004 Therefore, in this invention, when performing evaluation operations using an evaluation microcomputer, Access is stopped at the external memory address specified by the user, and the rest is real. A microcomputer that can perform program operations on time and accurately evaluate programs. The purpose is to provide a computer program evaluation device.

[0005]

[Means to solve the problem]

This invention was created to solve the above problems, and its characteristics are: There is a program memory in which program data is stored, and a program memory in which program data is stored. A program counter that accesses a predetermined address of the program memory and a program counter that accesses a specified address of the program memory. Instructions to decode program data read from a specified address an evaluation microcomputer having a decoder; A microcomputer that evaluates the program data by decoding the data. In the program evaluation device of the computer, one to one has an address corresponding to the address of the program memory and the address corresponding to the address of the program memory. the corresponding address is accessed simultaneously by the program counter. address where the access operation of the program memory and the program memory should be stopped. A break to stop access to the corresponding break memory address. A break control circuit that stores data and a break control circuit that stores data and When the data is determined and reading of the break data is determined, the evaluation micro Outputs a stop signal to the computer to stop the operation of the program counter. A data discrimination circuit is provided.

[0006]

[Effect]

According to the present invention, when evaluating a program, the program memory address and A break memory corresponding to 1 is provided to stop program memory access. Write break data to the break memory address corresponding to the desired address. Therefore, according to the user's instructions, it is possible to move from a certain address to a predetermined address. The program can be executed in real time, and the program can be executed in real time. For a controlled object where correct program evaluation cannot be performed unless the system is executed. and become effective.

[0007]

【Example】

The details of the present invention will be specifically explained with reference to the drawings. FIG. 1 is a block diagram showing the device of the present invention. In Figure 1, (1) is a microcomputer for evaluation, and a microcomputer for mass production. Is there any error in the program data to be stored in the ROM built into the computer? This is to confirm whether This evaluation microcomputer (1) is Program for accessing the address of external program memory (2) The program data read from the ram counter (3) and the program memory (2) It has a built-in instruction decoder (4) that decodes the data. Here, the said The program memory (2) is an EPROM or RA that can write and read data. M, and for the purpose of program evaluation, a mass production microcontroller is The same program data as the ROM program data that should be built into the computer Assume that it has been written. Then, the program counter (3) When a predetermined address of RAM memory (2) is accessed, data is read from the predetermined address. The program data is decoded by the instruction decoder (4), Processing will be performed according to the result of decoding this program data. and, The program is evaluated by checking whether the processing result is normal or not. Ru.

[0008] (5) is the input of the program counter (3) inside the evaluation microcomputer (1). This is a break memory for stopping the increment operation, and the break memory (5) is the same number of addresses that correspond one-to-one to each address in program memory (1). has a For example, one word of program memory (2) and break memory (5) - It is assumed that the code is 8 bits. (6) is a break memory control circuit; Controls address access and data writing/reading of the network memory (5). It is. (7) is an address switch and is obtained from the program counter (3). The address data and the address data obtained from the break memory control circuit (5) This is to switch and output to the break memory (5). In other words, the address switch ( 7) is a break memory control circuit (6) when writing data to the break memory (5). ) and break memory (5), and connect the address bus from break memory (5) to Address of program counter (3) and break memory (5) when reading data The address lines are switched in order to connect the bus. (8) is data This is a switch that transfers the data read from the break memory (5) to the break memory (5). 6) is used to switch whether or not to output. Here, program memory (2) The increment operation by the program counter (3) is stopped at a predetermined address. When you want to set the break memory (5) corresponding to the specified address of the program memory (2) FF, that is, "11111111" shall be written to the corresponding address of the brake. Write 00, that is, “00000000” to other addresses in memory (5). shall be kept.

[0009] (9) is a data discrimination circuit, which outputs a break through the data switch (8). It is determined whether the read output of the memory (5) is FF or 00. This de If the discrimination result by the data discrimination circuit (9) is FF, the data discrimination circuit (9) Incrementing the program counter (3) for the microcomputer (1) Outputs a stop signal to stop the operation.

0010 The operation of FIG. 1 will be explained below. First, at which address in the program memory (2) is the program counter (3) determined? Make sure that you want to stop the increment operation, and use the address switch (7). Connect the address bus between the break memory control circuit (6) and the break memory (5). do. Then, the break memory control circuit (6) controls the program memory (2). Access the break memory (5) address corresponding to the stop address and cut the data. An FF is written in the corresponding address of the break memory (5) via the converter (8). After that, the address bar between the evaluation microcomputer (1) and the break memory (5) is Connect the address via the address switch (7).

[0011] Then, by incrementing the program counter (3), the program The same address of memory (2) and break memory (5) is accessed at the same time. become. In this access state, the FF is read from the break memory (5). Then, this FF is discriminated by the data discrimination circuit (9) and the program counter ( The stop signal for stopping the increment operation in 3) is sent to the evaluation microcomputer. from which the address of the program memory (2) can be accessed. stops at the same address where the FF is written to the break memory (5). That will happen. In other words, the FF written to the predetermined address of break memory (5) The address of the program memory (2) is determined by the data determination circuit (9). access is done in real time, i.e. when a controlled object such as a servo motor is The operations will be executed until the series of operations is completed. And program notes The program data at the stop address of the library (2) is transferred to the block via the data switch (8). It is taken into the break memory control circuit (6), and the break memory control circuit (6) is loaded in advance. It will be debugged using the program provided in .

0012 From the above, if you want to stop accessing the program memory (2) address, It can be stopped at an address, and the program can be programmed to the address the user wants to debug. Programs can be executed in real time using the RAM memory (2). child This allows correct program evaluation if the operation is not executed in real time. Program evaluation can be performed reliably for controlled objects that cannot be In addition, program evaluation becomes easier.

[0013] Furthermore, when writing break data FF to break memory (5), write it to multiple addresses. There is no problem even if it comes to that.

[0014]

[Effect of the idea]

According to the present invention, when evaluating a program, the program memory address and A break memory corresponding to 1 is provided to stop program memory access. Write break data to the break memory address corresponding to the desired address. Therefore, according to the user's instructions, it is possible to move from a certain address to a predetermined address. The program can be executed in real time, and the program can be executed in real time. For a controlled object where correct program evaluation cannot be performed unless the system is executed. This provides benefits that can be effectively achieved.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the device of the present invention.

[Explanation of symbols]

(1) Evaluation microcomputer (2) Program memory (5) Break memory (9) Data discrimination circuit

Claims (2)

[Scope of utility model registration request] 1. An evaluation microcomputer comprising a program memory in which program data is stored, a program counter that accesses a predetermined address of the program memory, and an instruction decoder that decodes the program data read from the predetermined address of the program memory. A program evaluation device for a microcomputer that evaluates the program data by decoding the program data, the program evaluation device having a one-to-one correspondence with each address of the program memory, and an address corresponding to the address are simultaneously accessed by the program counter, and an address of the break memory corresponding to an address at which access operation of the program memory should be stopped, for stopping access. a break control circuit that stores break data; and a break control circuit that determines the data read from the break memory, and when it is determined that the break data has been read, sends a stop signal to the evaluation microcomputer to stop the operation of the program counter. A program evaluation device for a microcomputer, comprising: a data discrimination circuit for outputting data. 2. The microcomputer program evaluation device according to claim 1, wherein the break data to be stored in the break memory is at least one address.