JPH0392915A - Initialization processing method for ram - Google Patents

Abstract

PURPOSE:To move to objective application in a short time without waiting for the initialization processings of all RAMs by executing the initialization processing of the RAM with the sequence along the working format of a user and starting the work stepwise. CONSTITUTION:A RAM initialization processing means 3 executes the initialization of RAM area in a common area based on the leading address and end address of the common area. The RAM initialization processing means 3 next reads out the task of a first activation order from a task activation order table 2, reads out the leading address and end address of the corresponding task from RAM area information 1 and executes the initialization processing of the RAM area. When the initialization processing is finished, the task is activated by a task activating means 4 under the control of a monitoring means 5 and a correspondent work processing is executed. Afterwards, the divided RAM initialization processings are executed in the order along the flow of the work and moved to operation stepwise. Thus, after a power source is turned on, the objective work can be started in a short time.

Description

[Detailed Description of the Invention] [Industrial Field of Application] This invention is directed to
This relates to an initialization processing method for M.

[Prior Art] A microcomputer application device generally executes initialization processing when the power is turned on. The contents of the initialization process include a hash total check of the ROM in which the firmware is installed,
It consists of a write/read check of RAM such as working memory and buffer memory, detection of abnormalities in mechanical parts, hardware initialization processing, and firmware initialization processing.

FIG. 7 is a timing chart showing a conventional RAM initialization method, and as shown in the figure, operation is started after initialization processing for all RAM areas is completed.

[Question 8 to be solved by the invention] In recent years, microcomputer-applied devices have become more sophisticated and complex, and as a result, the time required for initialization processing, especially the time required to initialize RAM such as working memory and buffer memory, has become longer. Therefore, there was a problem in that it took a long time to become ready to start work after the power was turned on.

The present invention has been made to solve these problems, and an object of the present invention is to provide a RAM initialization processing method that shortens the time from power-on to starting a desired task.

[Means for Solving the Problems] The RAM initialization processing method according to the present invention is applicable to users who normally do not start multiple tasks at the same time after turning on the power, for example, start a specific routine task. Focusing on the fact that users often move on to other tasks one after the other, the RAM area to be initialized is divided according to the user's business type, and the RAM is divided in the order in which it is divided in accordance with the flow of business. RAM that has undergone area initialization processing and has completed initialization processing
By activating the tasks in the area one after another, the system is able to transition to operation in stages.

[Operation] In this invention, the RAM initialization process is divided according to the user's business type, and the divided RAM initialization processes are executed in the order that follows the business flow, and the operation is shifted to operation in stages. After the power is turned on, the desired work can be started in a short time.

[Embodiment] FIG. 1 is a flowchart showing a RAM initialization processing method according to an embodiment of the present invention, and FIG. 2 is a functional block diagram of an apparatus that implements the method. In Figure 2,
(1) is RAM area information used by each business task, and RAM area information is the RAM area information that corresponds to each business task.
Information indicating the start address and end address of the M area,
There are as many tasks as there are tasks. (2) is a task activation order table showing the activation order of each business task according to the user's business type, which exists for the number of tasks. (3) is a RAM initialization processing means that initializes the RAM based on the RAM area information (1). (4) is the RAM initialization processing means (3
) is a startup processing means that starts the task indicated by the task startup order table (2) when the initialization of the RAM is completed, and executes a macro instruction under monitor management. (5) is a monitor means that executes a management program that realizes multitasking processing.

FIG. 3 is an explanatory diagram showing each area of the RAM to be initialized. As shown, a common area (20),
Area for task #1 (2l), task # according to each job
Area for task #2 (22), area for task #3 (23),
...Divided into areas (2n) for task #n.

FIG. 4 is an explanatory diagram of RAM area information (1).

This RAM area information (1) includes the common area (2) first.
1> start address and end address (30) are stored, then the start address and end address (31>) of task #1 area (2l), and task #2 area (22).
Start address and end address (32), task #3
The start address and end address (3) of the area for
B), . . . The start address and end address (3n) of the area for task #n (2n) are stored.

FIG. 5 is an explanatory diagram of the task activation order table (2). In this example, task #1, task #2, task #3
, . . . It is assumed that the tasks are started in the order of task #n.

Next, the operation of the apparatus shown in FIG. 2 will be explained according to the flowchart shown in FIG.

The RAM initialization processing means (3) is activated when the device is powered on. Then, the RAM initialization processing means (3) calculates the start address of the common area shown in FIG. 4 and ! % 7 dresses (
30), the RA of the common area (20) in Figure 3
Initialize the M area (Sll). Here, the initialization of the RAM area is a process of checking the write/read conveyor of the RAM using check data and initial clearing.

When the initialization of the RAM area of the common area (20) is completed, the RAM initialization processing means (3>) next reads task #1 having the first start order from the task start order table (2), and then loads the RAM area. Applicable task # from information (1)
The start address and end address (3l) of task #1 are read out, and the RAM area of the task #1 area (2{) is initialized (S12). When the initialization process of the RAM area is completed, task #1 is started by the task start processing means (4) under the control of the monitor means (5) (Sl
3). This task #1 receives the dispatching service of the monitoring means (5>) and executes the corresponding business process (S
l4).

Thereafter, task #2, which is ranked second in the startup order, is read out from the startup order table (2), and the above-described process is performed on the task #2 area (22) to start task #2.

Similarly, the above-described process is repeated according to the activation order of the activation order table (2) until the RAM area initialization of the final task #n is completed (S15).

FIG. 6 is a timing chart showing the above-mentioned processing. After the initialization of the common area is completed, the area for task #1 is initialized and its operation starts, and the area for task #2 is initialized and its operation starts, and so on. When the initialization process of each task area of the RAM is completed, its operation is started sequentially.

Incidentally, in this embodiment, the task activation order table (2) includes task activation orders for the number of tasks, but the activation orders may be grouped into several groups for control. Further, in this embodiment, the RAM area information (1) includes a start address and a final address for each task,
Although address information is managed using these methods, if the RAM areas to be used are randomly distributed, address information may be managed using a queue method.

[Effects of the Invention] As described above, according to the present invention, RAM initialization processing is executed in the order according to the user's business type, and business can be started in stages, so that it is possible to initialize all RAM. You can move to the desired task in a short time without waiting for processing.

[Brief explanation of drawings]

FIG. 1 is a flowchart showing a RAM initialization processing method according to an embodiment of the present invention, FIG. 2 is a functional block diagram of a device that implements the method shown in FIG. An explanatory diagram of the RAM used, Figure 4 shows the RAM used by each task.
FIG. 5 is an explanatory diagram of the M area information, FIG. 5 is an explanatory diagram of the task activation order table, FIG. 6 is a timing chart showing the process of FIG. 1 over time, and FIG. 7 is a diagram of the conventional RAM initialization processing method. It is a timing chart shown over time. (1) ... RAM area information used for each task (2) ...
Task start order table (3)...RAM initialization processing means (4)...Task start processing means change Timing chart Figure 7

Claims (1)

[Claims] In a method for initializing RAM when power is turned on for a microcomputer application device, the RAM area to be initialized is divided according to the user's business style, and divided in an order according to the business flow. Execute the initialization process for the RAM area that was
A RAM characterized by sequentially starting tasks in an area.
How to initialize.