JPH04263351A - Peripheral device control system - Google Patents

Abstract

PURPOSE:To only reconnect a peripheral device to a main body device when they are not connected yet with each other and also to change the peripheral device into another of a different type without cutting off the power supply of the main body device. CONSTITUTION:A main body device 1 is provided together with a peripheral device 4 which is connected to the device 1. When the power supplies of both devices 1 and 4 are applied, the initialization processing is carried out for the device 4 and then the data input/output control is carried out between both devices 1 and 4. In such a system, a means which detects whether the device 4 is connected to the device 1 or not is added together with a means which reports a state where the device 4 is not connected to the device 1 yet, and a means which performs the initialization processing for the device 4 based on the preceding report when the device 4 is connected to the device 1.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a peripheral device control method in a system consisting of a main unit and peripheral devices, such as a personal computer and a printer, and particularly to a control method when the peripheral devices are not connected.

0002

2. Description of the Related Art FIG. 2 is a schematic diagram showing a general main unit and peripheral devices. In FIG. 2, 1 is a main body device such as an information processing device, a personal computer, or a word processor. The main body device 1 includes a main body control section 2 for controlling the main body device 1 and a peripheral device control section 3 for controlling the peripheral devices 4 . As the peripheral device 4,
These include keyboards, displays, printers, etc.

Next, a conventional monitoring and control system for the peripheral device 4 will be explained with reference to FIG. In FIG. 3, first, in S (step) 31, the main device 1 and the peripheral device 4 are powered on. When the power is turned on, initial processing of a program for controlling the peripheral device is executed in S32, and initial settings of the peripheral device control section 3 are performed in S33. Next, it is determined in S34 whether the peripheral device 4 is not connected to the main device 1, and if it is connected, data input/output control with the peripheral device 4 is performed in S35. If the peripheral device 4 is not connected, a disconnection process is performed in S36 to notify the user that the peripheral device 4 is not connected. To determine whether the peripheral device 4 is not connected,
The main body control section 2 performs this depending on the presence or absence of a signal on a signal line connecting the peripheral device control section 3 and the peripheral device 4.

0004

[Problem to be solved by the invention] In the conventional control method,
If the peripheral device was not connected, data could not be input/output to/from the peripheral device simply by reconnecting it. That is, it was necessary to turn off the power to the main unit and peripheral devices, and then turn them on again. Also, if the type of peripheral device changes,
In order to perform the initial settings again on the main unit according to the type of peripheral device, it was necessary to turn off the power to the main unit and then turn it on again.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to solve the above-mentioned problems, so that when a peripheral device is not connected, it is sufficient to simply reconnect the peripheral device, and a different one can be connected without disconnecting the power to the main device. An object of the present invention is to provide a peripheral device control method that can change the type of peripheral device.

[0006]

[Means for Solving the Problems] The present invention relates to a peripheral device control method capable of solving the above-mentioned problems, and includes a main unit and a peripheral device connected to the main unit, and a power source for the main unit and the peripheral device. means for detecting whether the peripheral device is connected to the main device in a system that performs data input/output control between the main device and the peripheral device after initializing the peripheral device when the main device is installed. , a means for notifying that the peripheral device is in an unconnected state when the peripheral device is not connected, and a means for initializing the connected peripheral device when the peripheral device is connected to the main device by this notification. and the means to do so.

[0007]

Embodiments Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a flowchart showing the flow of processing in one embodiment of the peripheral device control method of the present invention. Note that the hardware configuration will be explained using FIG. 2 here.

In FIG. 1, when the main unit 1 and the peripheral device 4 are powered on in S11, first the peripheral device 4 is turned on in S12.
Initial processing of the program that controls the peripheral device controller 3 is performed, and initial settings of the peripheral device control unit 3 are performed in S13. Next, S14
In step S15, it is determined whether the peripheral device 4 is unconnected to the main device 1, and if it is unconnected, a disconnection process is performed to notify the user that the peripheral device 4 is unconnected. After that, S
In step 16, the disconnection occurrence flag indicating that the disconnection state has occurred is turned on, and the process returns to step S14. Here, when the peripheral device 4 is connected to the main device 1, the process proceeds to S17, where it is determined whether or not the disconnection state occurrence flag is on. In S17, since the disconnection occurrence flag was previously turned on in S16, it is determined that it is on, and the process advances to S18.

[0009] In S18, the disconnection occurrence flag that was previously turned on is turned off, and the process returns to S13. Then, in S13, after the initial settings of the peripheral device control unit 3 are performed again,
The process advances to S19 via S14 and S17, and data input/output control with the peripheral device 4 is performed. On the other hand, in S14, if the peripheral device 4 has been connected from the beginning, the process advances to S19 via S17, and data input/output control with the peripheral device 4 is performed.

As described above, in this embodiment, if the peripheral device is not connected to the main unit, the peripheral device control section is automatically initialized, so that all you need to do is reconnect the peripheral device. This eliminates the troublesome trouble of turning off the power and then turning it on again, which is required in the past. Also, when changing to another type of peripheral device,
Similarly, there is no need to turn on the power to the main device again, and changes to peripheral devices can be easily made.

[0011]

[Effects of the Invention] As explained above, in the present invention, when a peripheral device is not connected to the main unit, the peripheral device can be used simply by reconnecting it, and without cutting off the power to the main unit. This has the advantage that it is possible to change to a different type of peripheral device.

[Brief explanation of the drawing]

FIG. 1 is a flowchart showing one embodiment of the present invention.

FIG. 2 is a schematic configuration diagram of a main unit and peripheral devices.

FIG. 3 is a flowchart of a conventional method.

[Explanation of symbols]

1 Main unit 2 Main body control section 3 Peripheral device control section 4 Peripheral devices

Claims (1)

[Claims] Claim 1: Consisting of a main unit and a peripheral device connected to the main unit, when the main unit and peripheral device are powered on, initialization processing of the peripheral device is performed, and then the main unit and peripheral device are connected to the main unit and the peripheral device. In a system that performs data input/output control with a main unit, means for detecting whether a peripheral device is connected to a main unit, and means for notifying an unconnected state when a peripheral device is not connected. and, when the peripheral device is connected to the main unit based on this notification, means for performing initial setting processing for the connected peripheral device.