JPH04160548A - Data read control system - Google Patents

Abstract

PURPOSE:To reduce the overhead by reading data stored in the buffer of an input controller into a data read part to read in data outputted from an input device at the time of output of a timer part. CONSTITUTION:Leading data is read in accordance with an interrupt request to read in succeeding data stored in a buffer 4 after the time required to store succeeding data outputted from an input device 2 into the buffer 4. Output data of the input device 2 is read in this manner. Consequently, one interrupt request is only accepted to read in data stored in the buffer 4. Thus, the overhead required for the read processing of output data of the input device 2 is reduced.

Description

Detailed Description of the Invention [Summary] Regarding a data reading control method executed when a data processing device reads data output from an input device via a buffer of an input control device, the data output from the input device is
The data processing device includes a data reading section that reads the first data stored in the buffer of the input control device when an interrupt request is received from the input control device; a data analysis unit that analyzes data length information of subsequent data following the first data according to a display value of the read first data;
a timer section that is activated by the data analysis section and outputs an output value after a time period corresponding to the analyzed data length information has elapsed; By reading the data stored in the buffer, the data output from the input device is read.

[Industrial application field]

The present invention relates to a data read control method executed when a data processing device reads data output from an input device via a buffer of an input control device, and in particular, the present invention relates to a data read control method executed when a data processing device reads data output from an input device through a buffer of an input control device, and in particular, the present invention relates to a data read control method executed when a data processing device reads data output from an input device via a buffer of an input control device. This relates to a data reading control method that allows data to be read according to the loading process.

In order to read data output from an input device such as a keyboard or mouse, the data processing device accepts interrupt requests from the input control device connected to the input device.Data processing device data In order to prevent processing efficiency from deteriorating, it is necessary to reduce the number of times interrupt processing is executed each time.

[Conventional technology] The prior art will be explained according to the fourth example.

Here, in the figure, 1 is a data processing device, 2a is a keyboard, 2b is a mouse, 3 is an input control device, 4 is a buffer provided in the input control device 3, 5 is an interrupt request unit provided in the input control device 3, and 6 1 is a communication line, 7 is a data line, 8 is an interrupt request signal line, and 9 is an interrupt release signal line.

The data output by input devices such as the keyboard 2a and the mouse 2b is divided into multiple highs according to each device, such as the data output by the keyboard 2a is 3 high 1~ and the data output by the mouse 2b is 5 high. It is configured with a keyboard 2a and a mouse 2 as input devices.
b, exclusive control is performed within the keyboard 2a in order to prevent data from the keyboard 2a from being mixed with data from the mouse 2b.

The buffer 4 has the maximum capacity for multiple hides of this input device, and according to the FIFO format,
Data from the communication line 6 is written in the order in which it arrives, and read out in the order in which it was written.The data that has been read out is erased, and new data is written in the area where the data has been erased. It will be processed as follows.

The keyboard 2a generates data such as a keyboard identification code, additional information on whether a key is pressed or released, and keyboard data for each key operation.

On the other hand, the mouse 2b generates data such as a mouse identification code, mouse button press state information, horizontal movement amount, vertical movement amount, etc. each time the mouse is moved or a button is operated. The input device data generated in this way is transferred to the input control device 3 via the communication line 6 and stored in the buffer 4. At this time, the interrupt request unit 5 sends an interrupt request signal to the data processing device 1 via the interrupt request signal line 8, and upon receiving this interrupt request signal, the data processing device 1: The data stored in the buffer 4 is read out via the data line 7.

Then, the data processing device 1 sends an interrupt confirmation signal indicating the end of the interrupt processing via the interrupt cancellation signal line 9. Upon receiving the interrupt Tiv and acknowledgment signal, the interrupt request unit 5 checks whether or not there is any data left in the buffer 4, and if there is, the interrupt request unit 5 requests the interrupt again. Via the signal line 8,
A process of sending an interrupt request signal to the data processing device 1 is executed.

In this way, conventionally, the input control device 3 generates an interrupt request signal for each byte, and receives this interrupt request signal.
Therefore, the data processing device 1 was processing by reading the data stored in the buffer 4 one by one.

[Problem to be solved by the invention]

However, in the prior art such as S2, the interrupt processing must be executed every time the data processing device 1, 4, and 2 are used, which has the problem of increasing overhead. From now on, according to the conventional technology,
There was a problem in that the data processing efficiency of the data processing device 1 deteriorated.

The present invention has been made in view of the above circumstances, and is designed to allow a data processing device to read data output from an input device via a buffer of an input control device in accordance with one interrupt process. The purpose is to provide a new data reading control method.

[Means to solve the problem]

FIG. 1 is a diagram showing the principle configuration of the present invention.

In the figure, the same components as those explained in FIG. 4 are indicated by the same symbols.

Reference numeral 2 indicates a plurality of types of input devices connected to the data processing device 1. 10 is a device driver included in the data processing device 1, which executes interface processing with the input control device 3; 20 is a data processing unit included in the data processing device 1, which performs interface processing with the input control device 3; Data processing is executed by referring to the output data of the input device 2.

The device driver 10 accepts the interrupt request signal from the interrupt requesting section 5, and when the accepted interrupt processing is completed, the device driver 10 issues an interrupt request signal to the interrupt requesting section 5 to terminate the interrupt processing. an interrupt control unit 11 that sends out a read-in confirmation signal; a data reading unit 12 that executes reading processing of the data stored in the buffer 4; a data analysis section 13 that analyzes data length information of subsequent data; and a timer section 14 that is activated by the data analysis section 13 and outputs an output value after a period of time corresponding to the data length information analyzed by the data analysis section 13 has elapsed. , and a driver buffer 15 that stores data read by the data reading section 12.

[Effect]

In the present invention, upon receiving an interrupt request from the interrupt requesting section 5, the interrupt control section 11 instructs the data reading section 12 to read the data stored in the buffer 4. Upon receiving this instruction, the data reading unit 12 reads the first byte of data from the buffer 4, stores the data in the driver buffer 15, and identifies the input device 2 that the first data has. The code is notified to the data analysis unit 13.

Upon receiving the notification of this identification code, the data analysis unit 13
By specifying the data length information of the subsequent data to be stored in the buffer 4 according to the identification code, the timer section 14 specifies the time required for the subsequent data to be stored in the buffer 4. It instructs the user to enter the 81:00 process at the specified time. In response to this instruction, the timer section 14 enters time counting processing, and when it detects that the storage time of the subsequent data has elapsed, it instructs the data reading section 12 to perform processing for reading the remaining subsequent data stored in the buffer 4. instruct.

Upon receiving this instruction, the data reading unit 12 performs c.

The remaining subsequent data stored in the buffer 4 is read in and stored in the driver buffer 15, and when this reading process is completed, an indication is given to the interrupt control unit 11 that the process of reading the data stored in the buffer 4 is completed. do.

Upon receiving this display, the interrupt control unit 11 sends an interrupt confirmation signal indicating the end of the interrupt processing to the interrupt requesting unit 5, and ends the processing.

In this way, in the present invention, when the first data is read in accordance with an interrupt request, the buffer 4 waits for the subsequent data output from the input device 2 to be stored in the buffer 4.
Since the configuration is such that the output data of the input device 2 is read by reading the subsequent data stored in the The data stored in the buffer 4 can now be read.

From this, it is possible to greatly reduce the amount of IS required for reading the output data of the input device 2. L is going to turn out.

〔Example] Hereinafter, the present invention will be explained in detail according to examples.

FIG. 2 shows a flowchart of the processing executed by the device driver 10 described in FIG. 1.

Next, the operational processing of the present invention will be explained in detail according to this flowchart.

As shown in step 1, when the device driver 10 receives an interrupt request from the input control device 3, if the interrupt request is related to a data read request, the device driver 10 proceeds to step 2. , reads the first one hide's worth of data from the buffer 4 provided in the input control device 3, and stores the data in the driver buffer 15. Then, in the following step 3, information on the total number of bytes of the subsequent data to be stored in the buffer 4 is specified from the identification code added to the leading data.

The identification code added to this first data indicates which input device 2 the first data and subsequent data are related to, such as data related to the keyboard 2a or data related to the mouse 2b. It expresses whether something exists.

From now on, as shown in FIG. 3, when the identification code indicates the keyboard '2a, the total number of hides of the remaining subsequent data is 2 hides, or when the identification code indicates the mouse 2b, The correspondence relationship between the identification code and the total number of devices in the subsequent data is managed, such as that the total number of hides in the remaining subsequent data is 4 hides, and this management data is referred to in step 3. The total number of hides of the subsequent data to be stored in the buffer 4 is determined from the identification code added to the read first data.

Once the device driver 10 specifies the total high I/number information of the subsequent data, the device driver 10 then proceeds to step 4 to determine the time required for subsequent data corresponding to the specified total high number to be stored from the input device 2 to the buffer 4. is specified, and the process of measuring the specified time begins.

Then, in step 5, when the elapse of the storage time of the subsequent data is detected, in the subsequent step 6, the remaining subsequent data stored in the buffer 4 of the input control device 3 is read, and the remaining data stored in the driver buffer 15 is read. Store in. Finally, in step 7, an interrupt confirmation signal indicating the end of the interrupt processing is sent to the input control device 3, thereby terminating the processing.

In this way, in the present invention, when the first data is read in accordance with an interrupt request, the buffer 4 waits for the subsequent data output from the input device 2 to be stored in the buffer 4.
The configuration is such that the output data of the input device 2 is read by reading subsequent data stored in the input device 2 .

[Effects of the Invention] As explained above, according to the present invention, the data processing device can read data output from the input device by simply accepting and accepting one interrupt request from the input control device. . From now on, it will be possible to greatly reduce the overhand required for reading the output data of the input device.

[Brief explanation of drawings]

FIG. 1 is a diagram showing the principle configuration of the present invention, FIG. 2 is a flowchart executed by a device driver, FIG. 3 is an explanatory diagram of management data of a device driver, and FIG. 4 is an explanatory diagram of a conventional technique. In the figure, 1 is a data processing device, 2 is an input device, 2a is a keyboard, 2b is a mouse, 3 is an input control device, 4 is a buffer, 5 is an interrupt request unit, 6 is a communication line, 7 is a data line, 8
9 is an interrupt request signal line, 9 is an interrupt release signal line, 10 is a device driver, 11 is an interrupt control section, 12 is a data reading section,
13 is a data analysis section, 14 is a timer section, 15 is a driver buffer, and 20 is a data processing section.

Claims (1)

[Scope of Claims] Consisting of a data processing device, a plurality of types of input devices, and an input control device including a buffer (4) for storing data output from the input device, the data processing device In a data processing system configured to read data stored in the buffer (4) in response to an interrupt request, the data processing device reads the data stored in the buffer (4) when there is an interrupt request from the input control device. a data reading section (12) that reads the first data read by the data reading section (12); and a data analysis section (12) that analyzes the data length information of the subsequent data following the first data according to the display value of the first data read by the data reading section (12). 13), and a timer section (14) that is activated by the data analysis section (13) and outputs an output value after a time corresponding to the data length information analyzed by the data analysis section (13), The data reading unit (12) reads data output from the input device by reading the data stored in the buffer (4) when the timer unit (14) outputs an output value. A data read control method characterized by processing.