JPH11112721A - Device and method for controlling switch in scanner device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To correctly report a switch state to a host device regardless of a switch depressing time and the cycle of a reporting request from the host device by providing a reporting switch information part for storing the reported switch state as against a request to fetch the switch state from the host device. SOLUTION: When a switch 2 is being continuously depressed for more than a prescribed time, the state where the switch is being depressed is set in the reporting switch information part 7 and an input switch information part 6. The state where the switch 2 is not depressed is monitored in a state where the input switch information part 6 is depressed and the state where the switch 2 is not depressed is set in the input switch information part 6 when the state where the switch is not continuously depressed for more than the prescribed time is recognized. When the report of the switch state is requested from the host device 9, contents set in the reporting switch information part 7 is reported and the state where the switch 2 is not depressed is set in the reporting switch information part 7 after reporting.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a switch control method and apparatus in a scanner device provided with a switch and capable of monitoring the state of the switch from a host device. It is possible to accurately notify the switch state regardless of the time and the cycle of the switch state notification request from the host device.

[0002]

2. Description of the Related Art FIG. 7 is a block diagram showing a conventional structure.
In the figure, 71 is a scanner device, and 79 is a host device.

The scanner device 71 is provided with a switch 72 and a switch control device 73. The switch control device 73 has a switch information section 75 for storing a switch state.
And switch state setting means 74 for setting the switch state operated by the operator in the switch information section 75.

[0004] The switch state setting means 74 is connected via an interface in which the host device 79 is not described.
When a request for capturing the switch state of the scanner device 71 is issued, the host device 79 is notified of the state set in the switch information section 75.

In some cases, the switch state setting means 74 may cause the switch 72 to appear to be depressed even though it is not depressed due to external noise. A removal process is provided.

When a mechanical sensor is used as a switch, the switch state setting means 74 may cause a chattering phenomenon, and the switch may appear to have been pressed a plurality of times. A chattering elimination process that waits for stabilization is provided.

FIG. 8 shows a processing flowchart of the switch state setting means of one embodiment of the prior art. Hereinafter, the operation will be described according to this flow.

Step S801: It is determined whether a switch has been pressed. If pressed, step S802
If not, the process proceeds to step S804.

Step S802: It is determined whether the switch has been pressed for a predetermined time. If the button has been pressed, the process proceeds to step S803. If the button has not been pressed, the process proceeds to step S806. In this process, noise of the switch and chattering generated when the switch is pressed are removed.

Step S803: The state where the switch is pressed is set in the switch information section. Then, the process proceeds to step S806.

Step S804: It is determined whether the switch has not been pressed for a predetermined time. If the button has not been pressed, the process proceeds to step S805. If the button has been pressed within a predetermined time, the process proceeds to step S806. In this process, chattering that occurs when the switch is released is removed.

Step S805: A state where no switch is pressed is set in the switch information section.

Step S806: It is determined whether or not a command has been issued to capture the state of the switch from the host device. If it has been issued, the process proceeds to step S807, and if it has not been issued, the process ends.

Step S807: The host device is notified of the contents set in the switch information section. Then, the process ends.

[0015]

However, in the prior art, in order for the host device to know the switch status of the scanner device, a command for capturing the switch status is issued at a constant cycle. If the command issuance cycle is short, the command is issued two or more times during the time when the switch is confirmed to be stable, and as a result, the switch appears to be pressed multiple times. there were. Also, when the operator keeps pressing the switch for a long time, there is also a problem that the switch looks like being pressed a plurality of times.

In addition, when the command issuance cycle is long and the switch pressing time is short, there is a problem that the switch pressing is lost.

FIG. 9 is a timing chart showing the issuance of a request command for switch information and switch status notification from the host device, and the notification information. This figure illustrates the above problem in an easy-to-understand manner.

FIG. 9A shows a case where the command issuance cycle is short. When the switch is pressed once, the host apparatus issues short-cycle command issuance P1 to P6.
Is issued, the switch information is pressed between the command issuances P3 and P4. Therefore, the host device is notified twice of the notification information indicating that the switch is pressed.

FIG. 9B shows a case where the command issuance cycle is long. When the switch is pressed once, the host apparatus issues a long-term command issuance P1.
~ P3 are issued, the pressed state of the switch is completed between the command issuances P1 and P2. Therefore, the host device is not notified of the notification information indicating that the switch is pressed.

That is, there is a problem in that the switch state of the scanner device is not correctly notified due to the correlation between the switch pressing time and the period of issuing a command for capturing the switch state from the host device.

Further, in order to eliminate noise generated in the input signal of the switch and chattering generated when the switch is pressed or released, a process for waiting for a change in the input signal of the switch to stabilize is provided. For this reason, there has been a problem that the processing time for removing noise and chatter becomes longer and the response of the switch becomes slower.

[0022]

SUMMARY OF THE INVENTION The present invention has been made in consideration of the above problems, and has an input switch information section for storing a state of a switch operation by an operator;
By having a notification switch information section that stores a switch state notified in response to a request to capture the switch state from the host device, regardless of the switch pressing time and the cycle of the switch status notification request from the host device, The switch state can be accurately notified to the host device.

[0023]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In a switch control method for a scanner device provided with a switch and capable of monitoring the state of the switch from a host device, there are provided two methods: a state in which the switch is not pressed and a state in which the switch is pressed.
An input switch information section for storing one state and a notification switch information section, and when the input switch information section is not pressed, monitors whether the switch is pressed, and continuously monitors for a predetermined time or more. When it is confirmed that the switch is pressed, the state where the switch is pressed is set in the notification switch information section and the input switch information section, and when the input switch information section is pressed, the switch is set. The state where the switch is not pressed is monitored.If the state where the switch is not pressed continuously for a predetermined time or more is confirmed, the state where the switch is not pressed is set in the input switch information section, and the switch state of the switch state is set from the host device. When a notification is requested, the content set in the notification switch information part is notified, and after the notification, the state where the switch is not pressed is set in the notification switch information part. It makes regardless of the period of the switch state of the notification request from depression time the host device switches by the operator, it is possible to notify the precise host device switches state.

When the input switch information section is not depressed, the predetermined time for confirming whether the switches are continuously depressed is shortened, and when the input switch information section is depressed, By increasing the predetermined time for confirming that the switch is not continuously pressed, the state in which the switch is pressed can be quickly set in the input switch information section, and the switch state notification performance can be set. Can be increased.

Further, when the request for the notification of the switch status from the host device is stopped for a predetermined time, or between the time when the scanner device is turned on and the time when the host device issues the request for the notification of the switch status, the notification switch information portion is provided. By setting the state in which the switch is not pressed down, when the switch is pressed down when the host device is not operating,
The state in which the switch is pressed can be released, and even when the host device starts operating, the scanner device does not suddenly operate.

Also, the interval time at which a request for notification of the switch status is generated from the host device is measured, and when the request for the notification of the switch status is cut off beyond a predetermined time based on the measured time, the switch information for notification is transmitted. By setting the switch to a state where the switch is not pressed, the switch information can be canceled at an optimal time even if the cycle of the switch status notification request varies depending on the hardware performance of the host device or the system environment.

[0027]

FIG. 1 is a block diagram showing the configuration of the present invention. In the figure, 1 is a scanner device, and 9 is a host device.

The scanner device 1 is provided with a switch 2 and a switch control device 3.
Is an input switch information section 6 for storing a switch state operated by the operator, a notification switch information section 7 for storing a switch state to be notified when a notification of the switch state is requested from the host device, Switch state setting means 4 for setting the set switch state in the input switch information section 6 and notifying the contents of the notification switch information section 7 when a notification of the switch state is requested from the host device, and a switch from the host device. A command issuance cycle setting unit 5 for setting a cycle in which a status notification request is made in the command cycle storage unit 8.

FIG. 2 shows a processing flowchart of the switch state setting means according to one embodiment of the present invention. Hereinafter, the operation will be described according to this flow.

Step S201: It is determined whether a switch has been pressed. If pressed, step S202
If not, the process proceeds to step S205.

Step S202: It is determined whether the switch has been pressed for a predetermined time. If the button has been pressed, the process proceeds to step S203. If the button has not been pressed, the process proceeds to step S207. In this process, noise of the switch and chattering generated when the switch is pressed are removed.

Step S203: The state where the switch is pressed is set in the input switch information section.

Step S204: The state where the switch is pressed is set in the notification switch information section. And
Proceed to step S207.

Step S205: It is determined whether the switch has not been pressed for a predetermined time. If it has not been pressed, the process proceeds to step S206, and if it has been pressed for a predetermined time, the process proceeds to step S207. In this process, chattering that occurs when the switch is released is removed.

Step S206: A state in which no switch is pressed is set in the input switch information section.

Step S207: It is determined whether a command has been issued from the host device to capture the switch state. If it has been issued, the process proceeds to step S208. If it has not been issued, the process proceeds to step S211.

Step S208: The cycle at which the command is issued is calculated and set in the command cycle storage unit. In addition,
Details of this processing will be described later.

Step S209: The contents set in the notification switch information section are notified to the host device.

Step S210: A state where no switch is pressed is set in the notification switch information section. Then, the process ends.

Step S211: It is determined whether the time during which no command is issued is longer than the command cycle set at step S208. If it is longer than the command period, the process proceeds to step S210, and if it is not longer than the command period, the process ends.

Next, the states of the input switch information, the notification switch information, the command issued from the host device, and the notification information to be notified to the host device, which are executed in the processing flowchart of FIG.

FIGS. 3 and 4 are timing charts (1/2) of input / notification switch information, issuance of a request command for switch status notification from the host device, and the notification information.

FIG. 3 shows a case where the command issuance cycle is short. The command issuance P1 to P6 having a short cycle is issued from the host device, and the switch is pressed once at the time of the command issuance P3 and P4. I have.

At the time of the command issuances P1 and P2, the notification switch information is in a state where the switch is not pressed, and the host device is notified of the notification information in a state where the switch is not pressed. Then, when the switch is pressed at the time T1, the state where the switch is pressed is set in the input switch information section and the notification switch information section.

At the time of the command issuance P3, the notification switch information is in a pressed state, so that the host device is notified of the notification information of the state in which the switch is pressed.
Then, immediately after the notification to the host device, the notification switch information is released, that is, the switch is set in a state where the switch is not pressed.

Since the notification switch information is not pressed at the time of the command issuance P4, the host device is notified of the notification information indicating that the switch is not pressed. Therefore, even if the host device issues a switch status notification request a plurality of times while the switch is pressed once, the host device is notified of the state in which the switch is pressed once.

FIG. 4 shows a case where the command issuance cycle is long. The command issuance P1 to P3 having a long cycle is issued from the host device, and a switch is set between the command issuance P1 and the command issuance P2. Pressed twice.

At the time of the command issuance P1, the notification switch information is in a state where the switch is not pressed, and the host device is notified of the notification information in a state where the switch is not pressed. Then, when the switch is pressed at the time T1, the state where the switch is pressed is set in the input switch information section and the notification switch information section.

Then, at time T2, the switch is released,
The state where the switch is not pressed is set in the input switch information section, whereas the state where the switch is pressed is set in the notification switch information section. At the time of the command issuance P2, since the notification switch information is in a pressed state, the host device is notified of the notification information indicating that the switch is being pressed. Then, immediately after the notification to the host device, the notification switch information is released, that is, the switch is set in a state where the switch is not pressed.

Therefore, even if the switch is pressed once without a switch status notification request from the host device, the host device is notified of the state of the switch being pressed once by the next notification request. Become.

Next, the process of calculating the command issuing cycle from the host device in step S208 in FIG. 2 will be described in detail.

FIG. 5 is a processing flowchart for setting a cycle at which a switch status notification request is generated from the host device. Hereinafter, the operation will be described according to this flow.

Step S501: It is determined whether the switch status notification request from the host device is the first time. If it is the first time, the process proceeds to step S502, and if it is not the first time, the process proceeds to step S503.

Step S502: The timer is read and the current time is stored in the temporary storage. Then, the process ends.

Step S503: The timer is read, and the difference between the current time and the time stored in the temporary storage unit is calculated. Then, the current time is stored in the temporary storage unit.

Step S504: The time difference calculated in step S503 is stored in the command cycle storage unit. Then, the process ends.

FIG. 6 shows an input signal diagram of the switch when noise and chattering occur. The arrow A is noise, the time during which noise is generated is T1, and the arrow B is
Is the chattering that occurs when the switch is pressed, and the arrow C is the chattering that occurs when the switch is released. The time during which the chattering occurs is T2,
T3.

The time T1 during which noise occurs is shorter than the times T2 and T3 during which chattering occurs.
Therefore, the switch is changed from a non-pressed state to a pressed state, and the switch is pressed down by shortening the monitoring time that is stabilized in the pressed state, that is, the predetermined time in step S202 in FIG. The state can be quickly set in the input switch information section.

[0059]

The present invention is embodied in the form described above, and has the following effects.

The switch status can be accurately notified to the host device regardless of the switch pressing time by the operator and the cycle of the switch status notification request from the host device.

Further, it is possible to quickly set the pressed state of the switch in the input switch information section, and it is possible to improve the performance of notifying the switch state.

When the switch is pressed when the host device is not operating, the state in which the switch is pressed can be released, so that even if the host device starts operating, the scanner device is immediately operated. Can be prevented.

Although the cycle of the switch status notification request varies depending on the hardware performance of the host device and the system environment, the switch information can be canceled in an optimum time in any case.

[Brief description of the drawings]

FIG. 1 is a configuration block diagram of the present invention.

FIG. 2 is a processing flowchart of a switch state setting unit according to one embodiment of the present invention.

FIG. 3 is a time chart (1) of input / notification switch information, issuance of a request command for switch state notification from a host device, and notification information thereof.

FIG. 4 is a time chart (2) of input / notification switch information, issuance of a request command for switch status notification from the host device, and notification information thereof.

FIG. 5 is a processing flowchart for setting a cycle in which a switch state notification request is generated from a host device.

FIG. 6 is an input signal diagram of a switch when noise and chattering occur.

FIG. 7 is a block diagram of a conventional configuration.

FIG. 8 is a processing flowchart of a switch state setting unit according to a conventional embodiment.

FIG. 9 is a time chart of issuance of switch information, a request command for switch status notification from the host device, and the notification information.

[Explanation of symbols]

 4 switch status setting means 6 input switch information section 7 notification switch information section

Claims (8)

[Claims] 1. A scanner device provided with a switch,
And a switch control method for a scanner device capable of monitoring a switch state from a host device, wherein an input switch information section (6) for storing two states of a state where the switch is not pressed and a state where the switch is pressed, and a notification switch. When the input switch information section (6) is not depressed, it is monitored whether the switch has been depressed and it has been confirmed that the switch has been depressed continuously for a predetermined time or more. In this case, the state in which the switch is pressed is set in the notification switch information section (7) and the input switch information section (6), and when the input switch information section (6) is in the pressed state, The state where the switch is not pressed is monitored, and when it is confirmed that the switch has not been pressed continuously for a predetermined time or more, the switch is pressed in the input switch information section (6). When the host device requests the switch state to be notified from the host device, the switch unit notifies the switch information unit for notification (7) of the set contents. After the notification, the switch is notified to the switch information unit for notification (7). A switch control method, wherein a state in which the switch is not pressed is set. 2. When the input switch information section (6) is not depressed, a predetermined time for checking whether switches are continuously pressed is shortened, and the input switch information section (6) is depressed. 2. The switch control method according to claim 1, wherein a predetermined time for confirming that the switch is not continuously pressed when the switch is pressed is extended. 3. The switch information unit for notification when the request for notification of the switch status from the host device has been stopped for a predetermined time, or from when the power of the scanner device is turned on until the host device issues a request for notification of the switch status. 2. The switch control method according to claim 1, wherein the state in which the switch is not pressed is set in (7). 4. A switching time for a switch status notification request from a host device is measured, and when the request for a switch status notification is cut off for more than a predetermined time based on the measured time, notification switch information. 4. The switch control method according to claim 3, wherein the switch is set to a state where the switch is not pressed. 5. A scanner device provided with a switch,
And a switch control unit in the scanner device capable of monitoring the state of the switch from the host device, wherein an input switch information unit (6) for storing two states of a state where the switch is not pressed and a state where the switch is pressed, and a notification switch. When the information section (7) and the input switch information section (6) are not pressed, it is monitored whether the switch is pressed, and when it is confirmed that the switch is continuously pressed for a predetermined time or more, The state where the switch is pressed is set in the notification switch information section (7) and the input switch information section (6), and when the input switch information section (6) is in the pressed state, the switch is set. A state where the switch is not pressed is monitored, and when a state where the switch is not pressed continuously for a predetermined time or more is confirmed, the switch is not pressed in the input switch information section (6). When the status is set and a notification of the switch status is requested from the host device, the content set in the notification switch information unit (7) is notified, and after the notification, the switch is pressed in the notification switch information unit (7). A switch state setting means (4) for setting a state not set. 6. When the input switch information section (6) is not depressed, a predetermined time for checking whether or not the switches are continuously depressed is shortened, and the input switch information section (6) is depressed. 6. The switch control device according to claim 5, further comprising: a switch state setting means for extending a predetermined time for confirming that the switch is not continuously pressed when the switch is set. . 7. A switch information unit for notification when a request for notification of a switch status from the host device has been stopped for a predetermined period of time, or during a period from when the power of the scanner device is turned on until the host device issues a request for notification of the switch status. 6. The switch control device according to claim 5, wherein a switch state setting means for setting a state in which the switch is not pressed is provided in (7). 8. A switch unit for notifying a switch status when a request for notification of a switch status is measured from a host apparatus and the request for notification of the switch status is cut off for a predetermined time based on the measured time. Switch state setting means (4) for setting the section (7) to a state where the switch is not pressed
The switch control device according to claim 7, wherein a switch is provided.