JPH0381831A - Interrupting operation device for microcomputer - Google Patents

Abstract

PURPOSE:To execute the power ON/OFF operation of plural modes by a single operation by means of an interruption port by one interruption port by preparing plural ON/OFF switches corresponding to plural normal ports and connecting these switches to one interruption port. CONSTITUTION:A master microcomputer 1 is provided with the interruption port 4 having a stand-by releasing function and plural ON/OFF switches 2 are connected to the port 4 in common. Respective switches 2 are connected to corresponding normal ports 5 through a key matrix 3, and in the case of keying in the computer 1, the matrix 3 inputs a code corresponding to the depressed switch out of plural switches 2. When the switch 2 is depressed in an interruption allowable state, the computer 1 is turned to an interruption mode and decides which key out of the switches 2 is depressed while scanning the port 5. When an operation command corresponding to the depressed key is sent to a slave microcomputer 6, the power ON/OFF operation of plural modes such as CD and a cassette tape recorder can be executed only by a single operation.

Description

DETAILED DESCRIPTION OF THE INVENTION <Field of Industrial Application> The present invention relates to an interrupt operation device for a microcomputer.

<Prior Art> In order to directly turn on/off power in each mode from the standby mode of a microcomputer, conventionally a microcomputer has been used that is equipped with the same number of interrupt ports as each mode that can release standby, or - After interrupting with the power-on key, it was necessary to press the on/off switch corresponding to each mode using the key scan operation.

FIG. 5 shows an example of a master microcomputer 10 having the number of interrupt ports 12 corresponding to the modes. An on/off switch 13 is connected to each interrupt port 12 to turn power on and off for each mode. It has become. Then, the master microcomputer 10 responds to the pressed switch.

It is configured to send commands to the slave microcomputer 11 in each mode. In addition, 14 is a display, 15
is a key matrix.

FIG. 6 shows an example of a master microcomputer 10' having one interrupt port. In this example, the power on key 16 is connected to the interrupt port 12', and the mode is selected by pressing the power on key 16 once and then pressing the on/off switch 13'. The master microcomputer 10' is configured to execute a key scan of the on/off switch 13' by turning on the power on key 16, determine the selected mode, and send a command to the slave microcomputer 11.

<Problems to be Solved by the Invention> However, the configuration in which the above-mentioned interrupt ports are provided corresponding to each mode has the drawback of increasing costs. Also, 1
The configuration using two interrupt ports is simple and the cost is low, but on the other hand, it requires two operations, resulting in poor operability.

<Summary of the Invention> The present invention has been made in order to improve the drawbacks of the conventional configuration described above, and includes a plurality of normal ports corresponding to various operations and a port commonly used for these plurality of normal ports. It is equipped with a microcomputer having one interrupt port, and a plurality of on/off switches 2 provided corresponding to a plurality of normal ports, and all of the plurality of on/off switches are connected to one interrupt port. When the on/off switch of the microcomputer is turned on, that signal is input to the interrupt port to release the microcomputer from standby, and then the microcomputer scans which on/off switch was turned on and detects the instructed operation. This is a basic feature.

Function> When one of the multiple on/off switches is turned on, that signal is input to the interrupt port.

The microcomputer scans the on/off switches that are turned on and executes the corresponding mode of operation. Thereby, power on/off in multiple modes can be performed in one operation using one interrupt port.

<Example> An embodiment of the present invention will be described below based on the drawings.

In FIG. 1, a master microcomputer 1 has one interrupt port 4 having a standby release function, and a plurality of on/off switches 2 are commonly connected to this interrupt port 4. The on/off switch 2 is normally connected to the port 5 via a key matrix 3, and the key matrix 3 is configured to input a code corresponding to a pressed switch in the on/off switch 2 to a key of the master microcomputer 1. has been done.

The master microcomputer 1 is configured to send commands to the slave microcomputers 6 of devices that execute each mode. In this embodiment, a slave microcomputer 6 for a CD, a cassette tape recorder, and a tuner is controlled. The master microcomputer 1 is also connected to the display 7, and is supplied with power by the power source Ace and the backup power source. Note that r is a pull-up resistor and R is a pull-down resistor.

When the on/off switch 2 is pressed while the master microcomputer 1 is in an interrupt enabled state, it enters an interrupt mode, scans the normal port 5, and determines which key in the on/off switch 2 has been pressed. Then, an operation command corresponding to the pressed key is sent to the slave microcomputer 6 to cause it to execute each operation.

Next, the operation will be explained.

As shown in Figure 2, when the backup power supply Vdd is turned on, initialization should start (Step 20)
, set the key output port to Hi (step 21), enable interrupts (step 22), perform other initialization (step 23), enter standby mode 1 (step 24), and ) As shown in step 2, it is difficult to judge whether the Acc power is on or not.
5), if it is off, continue standby mode 1 (step 26) * If the AC power is on,
It is determined whether the Ace was operating in any mode the last time the Ace power was turned off (step 27), and if the Ace power is turned off while operating in that mode, interrupts are disabled and the operation returns to normal. performs the operation (step 28), and if the Ace power is not turned off during mode operation, enters standby mode 2 (step 29); in this state, any key a to c in Figure 1 is turned on. A signal is input to lNTl, an interrupt is generated, and the microcomputer starts operating (step 30).At the same time, in order to avoid the inconvenience caused by another key being turned on due to a slight difference, lNTl
Interrupt input from is prohibited (step 31).

Then, it is checked whether any of the on/off switches 2 has been pressed and an interrupt has occurred (step 32).
When an interrupt occurs, it usually scans port 5 and determines whether the tuner key was pressed (step 33), the cassette key (step 34), or the CD key (step 34).
Step 35) is sequentially determined, and the operations shown in FIG. 3(B) are sequentially executed according to the determination results.

In FIG. 3(B), the tuner operation is executed (Step 40), it is determined whether the key of the other on/off switch 2 is pressed (Step 41), and if it is pressed, it is determined whether or not it is a CD (Step 42). ), if it is not pressed, it is determined whether the tuner key is turned off or not (step 43); if it is turned off, the process returns to standby mode 2 (step 44); if it is not turned off, the process returns to step 40.

If the CD key is pressed in step 42, the CD operation is executed (step 45), and it is determined whether another on/off switch 2 key has been pressed (step 46), and if it is, it is determined whether the key is the tuner or not. Determine (step 47)
If it is not pressed, it is determined whether the CD key is turned off or not (step 48). If it is turned off, the process returns to standby mode 2 (step 49); if it is not turned off, the process returns to step 45.

If the tuner key is pressed in step 47, the process returns to step 40. If the cassette key is pressed in step 42 or 47, the cassette operation is executed (step 50), and it is determined whether another on/off switch 2 key has been pressed (step 51); if it is, it is the tuner. If it is not pressed, it is determined whether the cassette key is turned off (step 53); if it is off, the mode returns to standby mode 2 (step 54); if it is not Return to step 50.

Another embodiment is shown in FIG. 4. In this embodiment, the present invention is applied to a type of cassette recorder without a power switch, and when a cassette is inserted into the device, the power is turned on and the predetermined operation is performed. It has become. In this embodiment, a cassette pack-in detection switch and an eject and play/stop switch are used as the on/off switch 2', which are connected to the normal port 5' and also to the interrupt port 4'. The master microcomputer 1 is configured to cause the cassette mechanism 9 to perform an operation corresponding to each switch in response to the pressed on/off switch 2'.

In the configuration described above, the master microcomputer 1 only needs to be equipped with one interrupt port 4, and when the on/off switch 2 is pressed once, an interrupt signal is input to the interrupt port 4, and the master microcomputer 1 is pressed. Scan the switch and cause the switch to perform the corresponding action.

Therefore, various modes can be selected with a simple operation.

<Effects of the Invention> As explained above, the microcomputer interrupt operation device of the present invention has a plurality of normal ports corresponding to various operations and one interrupt commonly used for these plurality of normal ports. It is equipped with a microcomputer having a port, and a plurality of on/off switches provided corresponding to the plurality of normal ports, and the plurality of on/off switches are all connected to one interrupt port, and when any of the on/off switches When it is turned on, the signal is input to the interrupt port and the standby state of the microcomputer is canceled, and then the microcomputer scans which on/off switch 2 is turned on and detects the instructed operation. Therefore, it has the advantage of being able to execute interrupts in multiple modes with a relatively simple configuration and simple operations.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing one embodiment of the present invention, FIGS. 2 and 3 are flowcharts for explaining the operation, FIG. 4 is a block diagram showing another embodiment, and FIGS. The figure is a block diagram showing a conventional example. l: Master microcomputer, 2: On/off switch, 3: Key matrix, 4: Interrupt port, 5: Normal port, 6: Slave microcomputer, 7: Display, 9: Cassette mechanism, 10: Master microcomputer, 11 Nislep microcomputer, 12
: Interrupt port, 13: On/off switch, 14: Display, 15: Key matrix, 16: Power on key

Claims (1)

[Claims] A microcomputer having a plurality of normal ports corresponding to various operations, one interrupt port commonly used for the plurality of normal ports, and a microcomputer having a plurality of normal ports corresponding to each of the plurality of normal ports. The on/off switches are all connected to one interrupt port, and when any of the on/off switches is turned on, the signal is input to the interrupt port and sent to the microcomputer. A microcomputer interrupt operating device characterized in that when the standby state of the microcomputer is released, the microcomputer subsequently scans which on/off switch has been turned on and detects the instructed operation.