JPS63296156A - Input/output port control system - Google Patents

Abstract

PURPOSE:To make the modification of driver software due to the change of an extension port unnecessary, by providing an access means which makes access to plural ports equivalently. CONSTITUTION:When interruption is applied on the extension port, I/O driver software 301 senses an extension port (1)31 side first, and decides the arrival of data, and stores the data in an I/O buffer for the extension port (1)31 if the data arrives. After the above processing being completed, the 301 senses an extension port (2)32 side, and stores the data in an I/O buffer for the extension port (2)32 if the data exists. Thus, the extension port is sensed alternately until no more data exists, and a state is shifted to an interruption waiting state. Similarly, an I/O buffer for a reference port 30 is prepared for the reference port 30, and a data read request from interface software 300 is delivered from the I/O buffer. In such a way, it is possible to control the data from plural ports with one driver software.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an input/output port control method, and particularly to an input/output port control method for accessing an input/output port having a plurality of standard interfaces.

[Conventional technology]

Conventionally, when data communication is performed between devices using multiple standard interfaces, I10 driver software is installed on each device to access the input/output (hereinafter referred to as step 10) port connected by the standard interface. It is prepared by being built into the operating system (hereinafter referred to as O8) that runs on .

[Problem that the invention seeks to solve]

The conventional I10 port control method described above requires an expansion board for devices that are standard equipment and have only one standard interface, such as a personal computer, and if that expansion board is not the standard expansion board for that device, a built-in The drawback was that the driver software had to be modified. Further, since the driver software built into the O8 cannot freely change the communication speed, etc., there is a drawback that application software that uses the driver software lacks flexibility.

[Means for solving problems]

The input/output port control method of the present invention includes access means for equivalently accessing a plurality of ports in a system that uses an expansion port I10 port in addition to a standard I10 port.

〔Example〕

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of the I10 port control method of the present invention. A general device 1 and a device 6 that sends and receives data to and from this device 1. A personal computer 3 that mediates data between the device 7 and the device Wt.
1 and a personal computer 3, a standard interface 4 where the personal computer 3 and the device 6 are connected, and a standard interface 5 where the personal computer 3 and the device 7 are connected. . The personal computer 3 includes interface software 300 for accessing standard interfaces 2, 4.5, and I10 driver software 301 called by the interface software 300. Also, standard baud) 30. Expansion port rlJ 31. Equipped with expansion port '2J32.

Note that standard interfaces 2 and 4.5 are both CCI
It is a general-purpose standard interface that satisfies TT (International Telegraph and Telephone Advisory Committee), ErA (Electronic Industries Association) standards, JIS (Japanese Industrial Standards), etc.

Next, the operation of this embodiment will be explained with reference to FIG. 2, which is a flowchart of I10 port control processing.

Here, the description will be made assuming that the I10 driver software 301 has initialized interrupt processing by the interface software 300. If there is an interrupt on the expansion port,
I10 driver software 301 first connects expansion port "1" 3
1 side and determines whether data has arrived. If so, this data is stored in the I10 buffer (not shown) for the expansion port rl'31. When the processing is completed, the expansion port '2J 32 side is sensed, and if there is data, this data is stored in the I10 buffer (not shown) for the expansion port '2J' 32. In this way, the expansion ports are sensed alternately until there is no more data, and the state transitions to an interrupt wait state. Similarly, an I10 buffer (not shown) for the standard port 30 exists for the standard port 30, and data read requests from the interface software 300 are passed from this I10 buffer.

In this way, according to this embodiment, data from a plurality of I10 ports can be controlled with one driver software.

〔Effect of the invention〕

As explained above, according to the I10 port control method of the present invention, multiple ports can be controlled with a single driver software.
Furthermore, since it is not a built-in driver for O8, it is easy to change the driver software even if the expansion port is changed, so there is an effect that there is flexibility when changing the expansion board.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of the I10 port control method of the present invention, and FIG. 2 is a block diagram showing an embodiment of the I10 port control method of the present invention.
It is a flowchart of 10 port control processing. 1.6,7. ...Device, 2.4.5...Standard interface, 3...Personal computer, 30...
・Standard port, 31.32...Expansion baud) rlJ
. '2J, 300...Interface software, 301
...I10 driver software.

Claims (1)

[Claims] An input/output port control method characterized by having access means for equivalently accessing a plurality of ports in a system that uses extended input/output ports in addition to standard input/output ports.