JPS62295241A - Mode processing circuit for electronic apparatus - Google Patents

Abstract

PURPOSE:To apparently eliminate a transition time by providing a transition vector table and making mode transition according to the transition vector table. CONSTITUTION:A mechanism controlling section 1 is provided with a loading motor 11 that makes loading and unloading of a tape, a control motor 12 that controls mode of a VTR (mechanism), and controller 2 is supplied to the controlling section 1 to make respective mode, and at the same time, signals indicating the state are supplied from the controlling section 1 to the controller 2. A mode transition table and a transition vector table are provided in the ROM of a microcomputer that constitutes the controller 2. When an operation key of a key inputting means 3 or an operation key of the controller of a remote- controller is depressed, this is processed by the controller 2, and the result of processing is supplied to the controlling section 1, and the controlling section 1 is controlled to attain a specified operation mode, and at the same time, the mode is displayed by a displaying means.

Description

[Detailed description of the invention] Detailed description of the invention [Industrial application field] The present invention relates to a mode processing circuit for electronic equipment.

[Summary of the invention]

This invention provides a transition vector table in an electronic device that transitions modes based on external manual commands,
By executing mode transitions according to this transition vector table, the processing time for human commands can be significantly reduced.

[Conventional technology]

VTRs have various operating modes such as play mode and rewind mode, but when changing these operating modes, it is necessary to switch mechanisms such as turning on and off the brake and pinch.

When switching this mechanism, if a plunger is used, the switching can be done almost instantaneously, but if a plunger is used, a fairly large current flows at startup, and the current must continue to flow even during normal operation. As a result, the wire circuit becomes larger and the power consumption increases.

Therefore, it has been considered to use a motor instead of a plunger. In other words, by using a motor and a gear, even a small motor can obtain the 8A power necessary for switching the mechanism, and in addition, the power consumption can be reduced, and the power supply circuit can also be reduced. Can be made smaller.

However, when switching mechanisms using a motor like this, the mode transition (switching)
For example, it takes about 2 seconds to change from stop mode to playback mode, about 1.5 seconds to go from playback mode to stop mode, and about 1.8 seconds to go from stop mode to recording mode.

Therefore, when pressing the first operation key and then pressing the second operation key, the user must wait until the mode transition by the first operation key is completed before operating the second operation key.

However, this is very inconvenient to use, so a method of stacking the human power of the operation keys is being considered.

That is, for example, as shown in FIG. 6 1'', the VTR is in the stop mode before time L1, and the trouble of cultivating soil can be resolved at time t1.

[Problem that the invention seeks to solve]

However, in the above-mentioned stacking method, as shown in FIG. 7, for example, after pressing the stop key at time t2, the process starts at time 1. When you press the Bose key, this pause key is valid for the recording mode that is the mode after transition (pressing the pause key in recording mode changes to recording Bose mode), so the modes stored in the mode stack are: It updates from stop mode to recording Bose mode.

Therefore, from time t3, the VTR transitions to recording Bose mode, and from time t4 to recording pause mode.

However, this is a different operating mode from the case of FIG. 6 even though the operating order of the stop key and pause key is the same.

That is, if a plurality of valid operation keys are pressed during mode transition, the mode stored in the mode stack is assumed to be the mode of the last pressed operation key when the update recording key is pressed. Then, the mode of the VTR (mechanism) is set at time t.
1 to the recording mode.

If, for example, the stop key is pressed at time t2 during this transition, this stop key is valid for the recording mode that is the mode after the transition, so the moat tank will know that it should be in the stop mode after the transition. be remembered.

Then, when the transition ends at time t3, the VTR enters the recording mode, but at this time, from the mode stack to time t
The stop mode instruction stored in step 2 is retrieved and executed.

Therefore, the VTR transitions to the stop mode from time t3, and enters the stop mode from time t4. Note that even if the pause key is pressed at time L5 during the stop mode, the Bose mode is meaningless compared to the stop mode, so this will not be executed.

Therefore, according to the stacking method, the next operation key must not be pressed (it will be ignored even if pressed) until the VTR mode transition has finished, and all keys pressed before then will be ignored. Therefore, depending on the timing at which the N operation key is pressed (during or after the mode transition), the operation mode changes to a different one.

Therefore, in such a stacking method, it has been considered that the mode stack has a multi-stage configuration, and input motes are sequentially stacked and executed in sequence.

However, in this multi-stage stack method, it is necessary to perform garbage collection on the mode stack to remove meaningless modes from the mode stack, which makes the microcomputer program for mode control complicated. It takes time. This is especially true when processing an 8-bit mode with a CPU that only has 4-bit comparison instructions. Also, RAM
requires an area for the mode stack.

This invention attempts to solve the above problems.

[Means for solving problems]

Therefore, in the present invention, a transition vector table is provided, and mode transition is performed according to this transition vector table.

[Effect]

Transitions to the desired mode with the minimum number of mode transitions.

〔Example〕

FIG. 1 shows the hardware related to mode transition of a VTR. (1) is its mechanism control unit, which includes a loading motor (11) that loads and unloads the tape, and a VTR (mechanism). It has a control motor (12) for controlling the mode of the drum and a servo circuit (13) for the drum and the main bustan.

In addition, (2) is a mode controller composed of a microcomputer, and its output is supplied to the control unit fl) to set the respective operation mode, and the state (mode) is not changed from the control unit (1). (No. 4 is supplied to the controller (2).

Further, (3) is a key manual means having respective operation keys, and (4) is a receiving circuit that receives operation key signals from the remote controller when operating the VTR by remote control. (4
A key human power signal from 1 is supplied to the controller (2). Further, (5) is a mode display means, which displays the mode of the VTR based on the output of the controller (2).

For example, a mode transition table and a transition vector table as shown in FIGS. 3 and 4 are provided in the ROM of the microcomputer constituting the controller (2).

Then, when you press the operation key of the human power means (3) or the operation key of the remote control controller, this controller (
2), and the processing result is supplied to the control unit (1) so that the control unit (1) enters a predetermined operation mode.
is controlled, and the mode is displayed by the display means (5).

FIG. 2 shows an example of mode transitions in response to manual keystrokes of the operating keys.

In the following description, the current mode is the mode of the VTR (mechanism) at that point in time, and during transition, it is the mode to which it is transitioning.

Final mode: This is the last mode stored in the controller (2) at that time, and whether or not the pressed operation key is valid is determined by whether it is valid for this final mode. Further, this final mode is displayed on the display means (5).

It is. Note that an area for storing the current mode and final mode is provided in the RAM of the microcomputer that constitutes the controller (2).

That is, in this example, °ζ is VT before time t1.
Since R is in stop mode, the current mode is of course stop mode, and the final mode and display is also stop mode.

Then, when the playback key is pressed at time t1, the neo mode transition table shown in FIG. 3 is referred to. This table shows when you press an operation key, whether that key is valid or invalid for the final mode at that time, and if it is valid, which mode you should transition to. It is. At time t1, the final mode is the stop mode, and the playback key is pressed manually, so the table shows that the playback mode should be entered.

Therefore, the final mode and display is set to the reproduction mode from time t1. Furthermore, the VTR (mechanism) starts to transition from the stop mode to the playback mode, and the current mode is also set to the playback mode.

Then, at time t2 during this transition, the stop key is pressed (11), and the mode transition table is referenced, which indicates that the transition should be made to the stop mode, so the final mode and display are changed. It is set to stop mode. However, V 'r R
The user himself continues to transition to the student mode (current mode) by key manual operation at time t1.

Furthermore, when the recording key is pressed at time t3 during this transition, the mode transition table is referred to, and according to this, the recording mode is changed to J.
M Since it is indicated that it should be moved, the final mode and display is set to recording mode. However, the VTR itself continues to transition to the playback mode manually operated by the key at time t1.

Then, at time t4, when the transition to the playback mode by the key input at time L1 is completed, the transition vector table shown in FIG. 4 is referred to. This table shows whether or not the VTR should make further mode changes from the current mode and final mode at that point, and which mode it should go to when it should make a mode change. ! This indicates whether the file should be moved. In this case (time 1+), the current mode is playback mode,
Since the final mode is recording mode, it is also indicated that the playback Bose mode should be entered. Therefore °ζ
, the VTR starts transitioning to the playback Bose mode from time t4, and the current mode is also changed to the playback Bose mode.

When the transition to the playback Bose mode is completed at time t5, the transition vector table is referred to again, and in this case, the current top mode is the 111 raw Bose mode and the final mode is the recording mode, so the next It shows that you should go into Bose mode. Therefore, the VTR starts transitioning to the recording Bose mode from time t5, and the current mode is also set to the recording Bose mode.

Furthermore, when the transition to the recording Bose mode ends at time t6, the transition vector table is referred to again, and in this case, the current mode is the recording Bose mode and the final mode is the recording mode, so the recording mode will be next. It shows what should be done. Therefore, in case 1''R, the transition to the recording mode starts from time t6, and the current mode is also set to the recording mode.

Then, when the transition to the recording mode ends at time t7, the transition vector table is referred to, and in this case, since the current mode and the final mode are both the same recording mode, no further mode transition will be performed. Therefore, after time t7, the VTR remains in the recording mode.

The above is an example of mode transition, and this can be summarized using a general algorithm as shown in FIG.

That is, this algorithm uses the mode controller (
It is also a flowchart of a program executed by the microcomputer that constitutes 2). Then, in step (21), it is checked whether or not there is any key force using the operation keys, and if there is key force, the microcomputer (controller)
2)) Processing is from step (21) to step (22)
In this step (22), step (2
Whether the key input checked in step 1) is valid or invalid for the final mode is checked according to the mode transition table.

Then, if it is determined that the key human power is effective in step (22), the process proceeds from step (22) to step (23).
), and finally the tot and display are updated according to the mode transition table, as shown at time t1 in FIG. 2, for example.

The process then proceeds from step (23) to step (31). Further, when there is no key human power in step (21) and when it is determined that key human power is invalid in step (22), the process is performed in step <21),
Proceed from step (22) to step (31).

Then, in this step (31), the mechanism (
It is checked whether the mode transition of VTR') has been completed, and if the mode transition is in progress, the process proceeds to step (
31) and returns to step (21).

Therefore, steps (21) to (23) and (31) are repeated during the period t1 to t4 in FIG. 2.

However, when it is determined in step (31) that the transition of the mechanism has ended, the process proceeds from step (31) to step (32), and this step (
32), it is checked whether the current mode and the final mode are equal, and if they are not equal, the process proceeds from step (32) to step (33), in which the transition vector table is referenced to determine the new The transition destination is determined and the current mode is updated to the new transition destination.

Subsequently, the process proceeds from step (33) to step (34).
In this step (34), step (34) is performed.
The transition to the current mode updated by 3) is started,
The process then returns to step (21).

Therefore, at time L4+ts+t6 in FIG. 2, the processes of steps (31) to (34) are being performed.

Further, when it is determined in step (32) that the current mode and the final mode are equal, the process returns from step (32) to step (21).

Therefore, this process is being performed at time t7.

In this way, according to the above processing routine, the mode changes as shown in FIG. 2, for example.

Note that the key manual check in step (22) can also be executed by a condition judgment command without using the mode transition table. Furthermore, in the above description, the case is VTR, but tape deck, video disc player, C
It can be used with any electronic device that requires time to change modes, such as a D player.

〔Effect of the invention〕

According to this invention, no matter how many operation keys are pressed, the mote to be transitioned to is optimized by the transition vector table.
It is possible to transition from the mode at the time the operation key is pressed to the desired mode with the minimum number of transitions.

In addition, the operation key reception and mode display are executed immediately if the key input is effective, and mode transitions are performed in the minimum number of times, so the user does not feel that the transition is slow. Therefore, the apparent transition time can be eliminated.

Furthermore, since no garbage collection is required, programming the controller (2) becomes simpler and less time consuming. Further, a stack area is also not required.

Furthermore, no matter what timing you press the operation key, the final mode will be the same.

[Brief explanation of the drawing]

FIG. 1 is a system diagram of an example of the present invention, and FIGS. 2 to 7 are diagrams for explaining the same. tel is a mechanism control unit, (2) is a mode controller, (3) is a key manual means, and (5) is a mode display means.

Claims (1)

[Scope of Claims] It has a transition vector table indicating the transition destination of the mode of the electronic device, determines the final mode of the electronic device according to the input command, and determines the final mode of the electronic device from the final mode and the mode after the transition. A mode processing circuit of an electronic device that determines a new transition destination mode by referring to the transition vector table and executes a transition to the determined mode to enter the final mode.