JPH05324857A - Alm gathering system - Google Patents

Abstract

PURPOSE:To suppress an increase in throughput and speed up processing by starting ALM processing only when the input state of ALM changes. CONSTITUTION:An MPU 1, a memory 2, and a peripheral device 3 are connected with a data bus and an address bus. Further. an ALM input part is connected to the peripheral device 3 and the address input part of a two-way dynamically readable and writable memory (DPRAM) 4. A fixed data generator 5 is connected to the data input part D2 of the DPRAM 4. A reference time generator 6 is connected to the MPU 1 and fixed data generator 5. In this constitution, the ALM processing is started corresponding to data showing whether or not the input state of the ALM stored in the DPRAM 4 changes. Therefore, only when the input state of the ALM changes, the ALM processing can be started, so the increase in the throughput corresponding to the ALM state can be suppressed.

Description

Detailed Description of the Invention

[0001]

The present invention relates to Micro Processing Uni
The present invention relates to an ALM collection method in a t (hereinafter referred to as MPU) system.

[0002]

2. Description of the Related Art As a conventional ALM collection method, there is a method in which an ALM state is collected by a peripheral I / O device (hereinafter referred to as a peripheral) at regular time intervals and an ALM process is activated.

[0003]

However, in the above-described conventional ALM collection method, the ALM processing is activated regardless of whether or not the input state of the ALM is changed.
There is a problem in that the amount of work per unit time (hereinafter, referred to as throughput) increases due to the frequent occurrence of states, which causes a delay in other processing.

The present invention has been made in view of the above problems, and in the ALM collection method in the MPU system, it is possible to suppress an increase in throughput corresponding to the ALM state and cause a processing delay. It is an object of the present invention to provide an ALM collection method capable of preventing the above.

[0005]

An ALM collection method according to the present invention is an ALM collection method for inputting ALMs in parallel in an MPU system having an MPU, a storage device, and a peripheral to process the ALMs. Contents in the address of the bidirectional random read / write memory, which is determined according to the state of the bidirectional random read / write memory, the reference time generator, and the ALM input in parallel at constant time intervals measured by the reference time generator. Means for writing predetermined data to the memory, means for writing the state of the ALM input in parallel to an arbitrary address (hereinafter referred to as POINTER) in the storage device, and the POINTE
Means for writing predetermined data into the contents at the address of the bidirectional random read / write memory corresponding to the contents of R, and activating the ALM process according to the contents of the bidirectional random read / write memory. And

[0006]

In the ALM collection method according to the present invention, the MP
Input ALM in parallel in U system
In the ALM collection method that processes
LM is input in parallel, and means for writing predetermined data to the address of the bidirectional readable / writable memory corresponding to the state of this ALM, means for writing the state of ALM to POINTER, and contents of the POINTER It has a means for writing predetermined data to an address of a bidirectional readable / writable memory. With these, AL
The M process is activated in accordance with the data stored in the bidirectional readable / writable memory that indicates whether or not the input state of the ALM is changed. Therefore, the ALM process can be activated only when the input state of the ALM is changed. Therefore, it is possible to suppress an increase in throughput corresponding to the ALM state.

[0007]

Embodiments of the present invention will now be described with reference to the accompanying drawings.

FIG. 1 is a block diagram showing an ALM acquisition method according to an embodiment of the present invention. As shown in FIG.
The U1, the memory 2 and the peripheral 3 are connected by a data bus and an address bus. Also, ALM
The input unit is connected to the peripheral 3 and the address input unit AD2 of the bidirectional read / write memory (hereinafter referred to as DPRAM) 4. The fixed data generator 5 is connected to the data input section D2 of the DPRAM 4. The reference time generator 6 is connected to the MPU 1 and the fixed data generator 5.

Next, the operation of the ALM collection system according to the present embodiment configured as described above will be described.

In the initial state, the contents of POINTER created at an arbitrary address in the RAM area of the memory 2 are set to "0". Here, when all the ALM inputs are normal, the input of the address input unit AD2 is assumed to be "0". When "1" is written in the DPRAM 4, the ALM process is not activated.
The ALM input inputs ALM in parallel. The output data “1” of the fixed data generator 5 is written in the address content of the DPRAM 4 which is designated by the input state of the ALM at regular intervals.

When the MPU system is activated, the reference time generator 6 outputs a reference time signal to the MPU 1 and the fixed data generator 5. After that, the above operation is repeated at regular intervals (hereinafter referred to as intervals). When all the ALM inputs are normal in the first interval after start-up, the output data "1" of the fixed data generator 5 is included in the address input section AD in the content of the address "0" of the DPRAM4.
2 and the data input section D2. At the same time, the MPU 1 outputs the value “0” of POINTER to the address bus and inputs the content “1” of the address “0” from the data input section D2 of the DPRAM 4. Next, the MPU 1 changes the input state of the ALM input via the peripheral 3 to PO.
The data is stored in INTER and is output to the address bus, and the data “0” is output to the data bus. The contents of the address "0" of the DPRAM 4 are reset to "0" by these series of sequences. Here, the ALM process is not started because "1" is written in the DPRAM4.

At the next interval, the ALM input is A
When it becomes "N" indicating the LM state, as described above, DP
The data “1” is written in the address “N” of the RAM 4. At this time, since the value of POINTER is “0”,
The data "0" is input to the content of the address "0" of the DPRAM4. Then, the value of POINTER is updated to "N" and the content of the address "N" of the DPRAM 4 is reset. Here, the ALM process is performed because "0" is written in the DPRAM 4.

In addition, the ALM will be used in the next interval.
When the input becomes "N" indicating the ALM status, DPR
Data "1" is written in the address "N" of AM4. At this time, since the value of POINTER is “N”,
Data "1" is input to the content of address "N" of DPRAM4. Then, the value of POINTER is updated to "N" and the content of the address "N" of the DPRAM 4 is reset. Here, the ALM process is not performed because "1" is written in the DPRAM4.

As a result, the ALM collection method according to the present embodiment is arranged to repeat the above-mentioned sequence to generate the ALM.
The ALM process can be activated only when the input state of A has changed.

[0015]

As described above, the ALM according to the present invention
According to the collection method, since the ALM process is activated only when the input state of the ALM changes, it is possible to suppress an increase in throughput corresponding to the ALM state, and to prevent a delay in other processes. Can be prevented. Further, the ALM acquisition method according to the present invention requires less components and is more economical than the ALM acquisition method which is processed by the hardware configured by using the shift register or the like.

[Brief description of drawings]

FIG. 1 is a block diagram showing an ALM acquisition method according to an embodiment of the present invention.

[Explanation of symbols]

 1; MPU 2; Memory 3; Peripheral 4; DPRAM 5; Fixed Data Generator 6; Reference Time Generator

Claims (1)

[Claims] 1. In an MPU system having a microprocessing unit, a storage device, and a peripheral (peripheral I / O device), ALMs are input in parallel and A
In the ALM collection method for processing the LM, the bidirectional read / write memory, the reference time generator, and the ALM state input in parallel at regular time intervals measured by the reference time generator are determined according to the state of the ALM. A means for writing predetermined data in the contents of the address of the bidirectional read / write memory, a means for writing the state of the ALM input in parallel to an arbitrary address in the storage device, and a contents of the arbitrary address in the storage device. Means for writing predetermined data to the contents at the address of the corresponding bidirectional readable / writable memory,
An ALM collection method, wherein M processing is activated in accordance with the contents of the bidirectional readable / writable memory.