JPH03216838A - Electronic equipment - Google Patents

Abstract

PURPOSE:To smooth an operation and to prevent a device from being complicated by eliminating contents stored in a storage means when the priority of a newly inputted code is higher than that of a code whose priority is the highest of stored codes. CONSTITUTION:When an input code is inputted from a key matrix 4, a controller 1 compares the priority of the input codes stored in a processing waiting buffer memory 2 with that of the input code newly inputted by the sue of a priority decision memory 3. When the priority of the input code newly inputted is higher, the contents in the memory 2 is erased. Therefore, the action of the input code whose priority is high is executed without waiting for the execution of the input code stored in the memory 2. Thus, the smooth operation is accomplished and the device is prevented from being complicated because a hardware for interruption need not be added.

Description

[Detailed Description of the Invention] <Industrial Application Field> This invention relates to electronic equipment. Prior Art> In electronic equipment, when an input device is operated continuously, the input code is stored once in a buffer memory and then
It is widely practiced to execute processes corresponding to input codes in the order in which they are input.

Figure 3 shows an example of this in a tape recorder. Now when the tape is running, FF. When APC:, EJECT is input continuously, F is stored in the buffer memory waiting for key processing in the order of input.
F. APC. EJECT code is stored (a).
Then, FF. APC. The EJECT operation is configured to be executed (b, c, d). Problems to be Solved by the Invention In the case of such a configuration, in the example of Fig. 3, EJECT
Even if you press the key, the E
The JECT operation will not be executed. However, E.J.
The function of ECT is to eject the tape from the deck, so when this EJECT operation is performed, FF. AP
It is more convenient for the user if it is executed before the C operation. Therefore, the operation time of the FF and APC is wasted and has the disadvantage of resulting in unnecessary waiting time.

In order to improve this problem, some systems have installed separate hardware for interrupts in the operating device, so that when there is an interrupt input with a high priority, that process is executed with priority. Are known. However, in this configuration, it is necessary to separately provide hardware for interrupts, which complicates the structure of the device and increases its cost.In addition, if there are many operations that need to be processed with priority, the hardware for interrupts may be required. It had the disadvantage of being complicated. SUMMARY OF THE INVENTION The object of the present invention is to improve the above-mentioned conventional drawbacks and improve operability without complicating the device.

For this purpose, the electronic device of the present invention includes means for storing input codes in the order of input, means for determining the priority of the input codes, and a code having the highest priority among the codes stored in the storing means. A basic feature of the present invention is that it includes means for deleting the contents stored in the storing means when a newly input code has a higher priority than a higher-ranked code.

<Operation> The priority of the input code is determined by the determining means. This newly input code is compared with the code with the highest priority among the codes already stored in the storage means. If the priority of the newly input code is higher than the code with the highest priority among the codes stored in the storage means, the contents stored in the storage means are deleted.

Embodiment> An embodiment in which the present invention is applied to a tape recorder will be described below with reference to the drawings.

In FIG. 1, various operation command signals from each key of a key matrix 4 are input to a control device 1 mainly composed of a microcomputer. The control device 1 is configured to control the mechanism section 5 of the device based on this operation command signal and the like. A processing buffer memory 2 and a priority order determination memory 3 are connected to the control device 1.
The input code input from the key matrix 4 is temporarily stored in the processing buffer memory 2. Furthermore, the priority order determination memory 3 is configured to store the priority order code of the input code having the highest priority among the input codes stored in the key matrix 4.

The input code from key matrix 4 is assigned a priority code as shown in Table 1 below, and the lower 4
The larger the bit number, the higher the operation priority.

Table 1 When an input code is input from the key matrix 4, the control device 1 compares the priority order of the input code stored in the processing waiting buffer memory 2 with the priority order of the newly input input code, and creates a new input code. If the priority of the input code input is high, the contents of the processing buffer memory 2 are erased. This makes it possible to execute the operation of the input code with a high priority without waiting for the execution of the input code stored in the pending buffer memory 2.

This operation will be explained in detail with reference to FIG.

The control device 1 refers to the priority order of the newly inputted input code and stores the warp priority code in the internal X register (step 20). Then, it is determined whether or not there is a waiting input code in the waiting buffer memory 2 (step 2).
1) If there is no priority code, store the priority code placed in the X register in the priority determination memory 3 (step 24), and store the newly input input code in the processing buffer memory 2 (step 25) 6. If there is an input code waiting to be processed in the pending buffer memory 2 at step 21, the priority code stored in the X register is compared with the priority code in the priority determination memory 3 (step 22). The priority order determination memory 3 always contains the highest priority code among the input codes up to that point. If the priority code of the X register is large, that is, if the newly inputted input code has a high priority, the contents of the waiting buffer memory 2 are erased, and the waiting input code stored in the waiting buffer memory 2 is (Step 23). Then, the priority code of the new manual code is stored in the priority determination memory 3,
The new input code is also stored in the processing buffer memory 2 (steps 24 and 25). In step 22, if the priority of the new input code is low, the input code is added to the processing buffer memory 2 (step 25),
The execution of the input code is put into a waiting state.

Note that the priority order determination memory 3 is not essential and may have any configuration as long as it is possible to compare priorities, and it is also possible to compare data between the control device 1 and the processing buffer memory 2. ．． According to the above configuration, when an input code with a high priority is input from the key matrix 4, the contents of the processing buffer memory 2 are erased.
There is no waiting time, and smooth operation can be achieved. In addition, there is no need to add hardware for interrupts, etc.
This prevents the device from becoming more complex. Effects of the Invention> As explained above, the electronic device of the present invention has a means for storing input codes in the order of input, a means for determining the priority order of the input codes, and a means for storing input codes in the storing means. When a newly input code has a higher priority than the code with the highest priority among the codes that have been input, the code with the highest priority is deleted. When the code is input, the contents of the storage means are erased. Therefore, operations can be performed smoothly, and there is no need to add hardware or the like for this purpose, which has the effect of preventing the device from becoming complicated.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention, FIG. 2 is a flowchart for explaining the operation, and FIG. 3 is an explanatory diagram of a conventional configuration. 12 control device, 2: processing buffer memory, 3: priority order determination memory, 4: key matrix, 5: mechanism section.

Claims (1)

[Scope of Claims] Means for storing input codes in the order of input, means for determining the priority of the input codes, and a code having the highest priority among the codes stored in the storing means, An electronic device comprising: means for deleting contents stored in the storing means when a newly input code has a high priority.