JPH11149288A - Electronic musical instrument system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently operate an automatic power source cutting off function in an electronic instrument without inconsistency considering the actual operation state and the motion state of peripheral apparatus by providing a control means controlling motion of an automatic power source cutting off device according to detection of a state signal. SOLUTION: A CPU 10 and a CPU 20 process communication, between an electronic instrument 1 and peripheral apparatuses connected to it, and the power source cutting off control of a floppy disk module 2, data concering bulk dump control, MIDI data, and the like are signal exchanged for each other. Whether a signal showing a motion state output from the CPU 20 is an access signal or a non-access signal (power off completion signal) is controlled. Namely, whether the signal showing a motion state from the CPU 20 is a power off completion signal or not is judged, and in the case of the power off completion signal (YES), stop of power supply to the respective peripheral apparatuses is indicated to a power supply means 1c.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic musical instrument system having an automatic power-off (auto power-off) function for automatically stopping power supply when no operation is performed for a predetermined time.

[0002]

2. Description of the Related Art Recently, some electronic musical instruments include an automatic power supply that automatically stops power supply when an operator does not perform any operation on various switches, keyboards, and other controls within a predetermined time. Some have a power-off function. An electronic musical instrument having such an automatic power-off function is described in Japanese Utility Model Laid-Open No. 59-161191. As a similar technique, there is a technique in which power is supplied not by a hardware switch but by a software-controlled switch. For example, there is a type in which power is turned on / off by operating a keyboard instead of a hardware switch. Such an electronic musical instrument has a disk drive for storing data and a MIDI for assisting performance.
By expandingly connecting peripheral devices such as a keyboard, an electronic musical instrument system capable of performing various operations and the like that cannot be achieved by an electronic musical instrument alone can be configured. In such an electronic musical instrument system, the operation of a peripheral device can be controlled by operating the electronic musical instrument of the main unit, and the operation of the electronic musical instrument of the main unit can be controlled by operating the peripheral device. it can.

[0003]

The electronic musical instrument constituting the electronic musical instrument system has an auto power-off function.
The auto power off function does not operate as long as the electronic musical instrument on the main unit is operated. However, when only the peripheral device is operated or operating without operating the electronic musical instrument on the main body side, the auto power off function of the electronic musical instrument on the main body side operates, and the main musical instrument on the main body side operates. May be automatically turned off.

[0004] For example, even if a MIDI keyboard is connected as a peripheral device, and a player operates by operating only the MIDI keyboard, the power of the main body is automatically turned off and the sound is stopped. That situation occurs. Also, if a disk drive is connected as a peripheral device, and various data in the electronic musical instrument is stored by operating this disk drive, if the power of the main unit is automatically turned off, the data being written will be lost. It is destroyed. Therefore, until the data writing process is completed,
In order to prevent the auto power-off function of the main unit from operating, there has been a trouble that it is necessary to continuously apply unnecessary operations to the electronic musical instrument of the main unit.

[0005] The present invention has been made in view of the above-mentioned point, and even when a peripheral device is extendedly connected to an electronic musical instrument having an automatic power-off function, the operation of the peripheral device depends on the operating state or the operating state of the peripheral device. It is another object of the present invention to provide an electronic musical instrument system configured to operate an automatic power-off function without contradiction.

[0006]

An electronic musical instrument system according to the present invention comprises an electronic musical instrument having an automatic power-off device for automatically turning off a power supply according to whether or not the electronic musical instrument is operated, and an electronic musical instrument system comprising: In an electronic musical instrument system including a peripheral device that is extendedly connected, the peripheral device includes a status signal generating unit that generates a status signal indicating that the peripheral device is in an operating state or an operating state. Wherein the electronic musical instrument has control means for detecting the status signal generated by the status signal generating means and controlling the operation of the automatic power supply disconnection device in accordance with the detection of the status signal. Is what you do.

[0007] The automatic power-off device is built in the electronic musical instrument, and controls automatic power-off according to whether or not the electronic musical instrument is operated. Peripheral devices are extendedly connected to such electronic musical instruments. Here, the term “expandably connected” refers to a case where a CPU board having a new function is mounted inside the electronic musical instrument or connected to the outside of the electronic musical instrument via a cable. Here, according to the present invention, the electronic musical instrument is configured such that the peripheral device has status signal generating means for generating a status signal indicating that the peripheral device is operating or operating. Is configured to have a control means for detecting the status signal generated by the status signal generating means and controlling the operation of the automatic power disconnection device in response to the detection of the status signal. Thus, the automatic power-off device built in the electronic musical instrument not only controls the automatic power-off according to whether or not the electronic musical instrument body is operated, but also responds to the status signal output from the peripheral device. Controls automatic power off. Therefore, when a peripheral device is extendedly connected to an electronic musical instrument having an automatic power-off function, the automatic power-off function does not operate when the peripheral device is operated or is operating, and the automatic power-off function does not conflict. A disconnection function can be performed.

[0008]

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 is a block diagram showing a hardware configuration of one embodiment of an electronic musical instrument system according to the present invention. In the figure, for the electronic musical instrument 1,
This shows a case where peripheral devices of the floppy disk module 2 and the MIDI keyboard 3 are extendedly connected. Here, the floppy disk module 2 is built in the electronic musical instrument 1, and the MIDI keyboard 3 is connected to the outside of the electronic musical instrument 1 via a MIDI signal line 4.

In this embodiment, the overall control of the electronic musical instrument 1 is performed by a microprocessor unit (CPU)
This is performed by a microcomputer system including the OM 11 and the RAM 12. The CPU 10 controls the overall operation of the electronic musical instrument 1. This CPU 10
To the ROM via the data and address bus 13
11, a RAM 12, a key press detection circuit 14, a switch detection circuit 16, a display circuit 18, and a sound source circuit 1a are connected.

The ROM 11 stores a processing program for controlling the overall operation of the electronic musical instrument 1 and various data (tone data, key code KC, etc.). R
The AM 12 is used as a register or a flag for temporarily storing data relating to musical sounds and various data generated when the CPU 10 executes a program, and is assigned a predetermined address area of a random access memory (RAM). .

The keyboard 15 has a plurality of keys for selecting the pitch of a musical tone to be produced, and has a key switch corresponding to each key. The key press detection circuit 14 includes a key switch circuit provided corresponding to each key of the keyboard 15 for designating a pitch of a musical tone to be generated. The key press detection circuit 14 detects a change from the key release state of the keyboard 15 to the key press state and outputs a key-on event, and detects a change from the key press state to the key release state and outputs a key-off event. At the same time, a key code indicating the pitch of the key for each key-on event and key-off event is output. Instead of the keyboard 15 and the key press detection circuit 14, M
The IDI keyboard 3 includes the MIDI signal line 4 and the CPU 10
To the data and address bus 13 to input the same performance information.

The panel switch 17 has various operators for selecting, setting, and controlling a tone color, a volume, a pitch, an effect, and the like. The switch detection circuit 16 includes a panel switch 17
And outputs operation data corresponding to the operation status of each operator as event information.

The display circuit 18 displays various information such as the control state of the CPU 10 and the contents of setting parameters on the display unit 19. The display unit 19 is a liquid crystal display panel (LC
D), and its display operation is controlled by the display circuit 18.

The tone generator circuit 1a includes a key code, a key-on,
Key-off, tone color data and the like are input, and a tone signal is generated based on these various data. The digital tone signal generated from the tone generator 1a is output to the sound system 1b via a D / A converter (not shown). The sound system 1b includes a speaker, an amplifier, and the like, and generates a tone according to an analog tone signal from the D / A converter.

The power supply means 1c supplies power to each component in the electronic musical instrument 1. Here, the connection relation with each constituent means is omitted.
The power supply unit 1c also supplies power to the floppy disk module 2 built in the electronic musical instrument 1.

The floppy disk module 2 writes data in the electronic musical instrument 1 to a floppy disk, reads data stored in the floppy disk, and stores the data in the RAM 12 in the electronic musical instrument 1. The floppy disk module 2 is built in the electronic musical instrument 1 and its operation is controlled by a microcomputer system independent of the microcomputer system for controlling the operation of the electronic musical instrument 1. That is, the floppy disk module 2 is
It is controlled by a microcomputer system consisting of U20, ROM21 and RAM22.

The CPU 20 controls the overall operation of the floppy disk module 2. This CP
ROM 21, RAM 22, floppy disk control circuit 24, switch detection circuit 26, and display circuit 28 are connected to U 20 via a data and address bus 23. It should be noted that the floppy disk module 2 has a function of transmitting MIDI data from the CPU 10 of the electronic musical instrument 1 to the CPU 20 in addition to the original function of the floppy disk device.
And has a function as a MIDI interface for transmitting to other external MIDI devices via the.

The ROM 21 stores a processing program for controlling the operation of the entire module and various data. The RAM 22 is used as a register or a flag for temporarily storing data relating to a musical tone transmitted from the electronic musical instrument 1 and various data generated when the CPU 20 executes a program. Address areas are respectively assigned.

Floppy disk drive (FDD) 2
5 holds the floppy disk, rotates it,
The head assembly is moved to a predetermined position on the recording surface of the floppy disk, and data is read or written while the head assembly is in contact with the recording surface. The floppy disk control circuit 24 controls the floppy disk drive 2
5 to control the operation of each mechanism.

The switch section 27 is composed of various operators for setting and controlling the operation of the floppy disk drive 25, and has a data load switch, a data save switch and the like. The switch detection circuit 26 is provided corresponding to each operator of the switch unit 27, and outputs operation data corresponding to the operation status of each operator.

The display circuit 28 controls the state of the CPU 20,
Various kinds of information such as the contents of the setting parameters are displayed on the display unit 29. For example, it is displayed that data is being written or being read. The display unit 29 includes an LED or the like, and its display operation is controlled by the display circuit 28.

The MIDI keyboard 3 is provided for the electronic musical instrument 1.
Connected via DI signal line 4. The operation of the MIDI keyboard 3 is controlled by a microcomputer system including a CPU 30, a ROM 31, and a RAM 32. Although the MIDI keyboard 3 is directly connected to the CPU 10 of the electronic musical instrument 1,
The connection may be made via the CPU 20 of the floppy disk module 2.

The CPU 30 controls the MIDI keyboard 3
This controls the overall operation of. The CPU 30 is connected to the ROM 3 via a data and address bus 33.
1, a RAM 32, a key press detection circuit 34, a switch detection circuit 36, and a display circuit 38 are connected. This MIDI
The keyboard 3 does not include the sound source circuit 1a and the sound system 1b of the electronic musical instrument 1 except that the keyboard 3 does not include the sound source circuit 1a and the sound system 1b.
Therefore, the description is omitted here. Note that the MIDI keyboard 3 may or may not have its own power supply means. If not, power is supplied from the power supply means 1c of the electronic musical instrument 1 via a power line.

Next, an example of processing of an electronic musical instrument system including the electronic musical instrument 1 and a floppy disk drive will be described with reference to FIG.
This will be described with reference to the flowchart of FIG. FIG. 2 shows C
FIG. 3 is a diagram illustrating an example of a “power-on interrupt process” performed by a PU 10; The CPU 10 is always in a sleep mode in which the presence or absence of a power-on interrupt or the like can be detected even in a power-off state, and executes the power-on interrupt process when a power-on interrupt occurs. Accordingly, when a power-on interrupt occurs, the CPU 10 processes this power-on interrupt processing in the following steps in order.

Step 2A: The power-on interrupt flag is set to "1" to invalidate the power-on interrupt generated thereafter. Step 2B: Initialization is performed by setting an initial value in each register and flag in the RAM 12. Step 2C: Perform normal tone processing according to the operation of the keyboard 15.

Step 2D: The operation state of each operator on the panel switch 17 is scanned. Step 2E: As a result of the previous panel switch scan processing, it is determined whether there is a panel event. If there is a panel event (YES), the process proceeds to the next step 2F, and if not (NO), the process jumps to step 2K. I do. Step 2F: Since it was determined in the previous step 2E that there was a panel event, here, it is determined whether or not the panel event is for the power-off key, and if it is for the power-off key (YES), the step is performed. Proceed to 2J; otherwise (NO) proceed to 2G.

Step 2G: Since it was determined in the previous step 2F that the panel event did not correspond to the power-off key, other switch processing corresponding to keys other than the power-off key is executed here. Step 2H: Since some switch processing has been executed by a panel event, a counter for automatic power-off (power-off counter) is cleared to start measurement of a predetermined time from the time of this operation.

This power-off counter is a counter for measuring time, and every time a switch on the panel switch 17 is operated, or a peripheral device (in this embodiment, extendedly connected to the electronic musical instrument 1). The flag is cleared each time the operator of the floppy disk module 2 and the MIDI keyboard 3) is operated. That is, the power-off counter measures a time interval from when a switch on the panel switch 17 is operated to when a switch is operated again. Therefore, when the count value of the power-off counter reaches a predetermined value, the panel switch 17 is turned off within a time corresponding to the predetermined value.
Since it means that none of the above switches has been operated, the power-off process is executed at step 2M at that time.

Step 2J: Since it was determined in the previous step 2F that the panel event corresponds to the power-off key, power-off processing is executed here. The details of the power-off process are shown in FIG. Step 2K: The CPU 10 and the CPU 20 perform communication processing with the peripheral device connected to the electronic musical instrument 1 to exchange data and MIDI data relating to power-off control and bulk dump control of the floppy disk module 2. In this embodiment, communication processing between the electronic musical instrument 1 and the floppy disk module 2 will be described.

Step 2L: It is determined whether or not the power-off counter has reached a predetermined value.
In the case of S), the process proceeds to the next step 2M, in which the same power-off process as in the step 2J is executed. If the power-off process is not the predetermined value (NO), the process returns to the step 2C to execute the processes of steps 2C to 2K. . That is, in this step, it is determined whether or not the panel switch 17 or the switch unit 27 of the floppy disk module 2 has been operated within a predetermined time. Step 2M: Since the fact that the power-off counter has reached the predetermined value in the previous step 2L means that the panel switch 17 has not been operated within a predetermined time, the same power-off processing as in step 2J is executed here. I do.
The details of the power-off process are shown in FIG.

The flowchart of the power-off interrupt processing shows only the case where the power-off counter is cleared every time the switch on the panel switch 17 is operated, and the case where the keyboard 15 is operated is omitted. However, during the normal tone processing of step 2C, the keyboard 1
Each time 5 is operated, the power-off counter is cleared in the same manner. The power-off counter is also cleared when the keyboard 35 and the panel switch 37 of the MIDI keyboard 3 are operated.

FIG. 3 is a diagram showing an example of the "power-off process" of FIG. The CPU 10 performs this power-off process sequentially in the following steps. Step 3A: CP of floppy disk module 2
A power-off request signal is sent to U20. This power-off request signal is a signal that is output when the power-off key of the electronic musical instrument 1 is operated or when no operation is performed on the panel switch 17 for a certain period of time. This is a signal for inquiring of the floppy disk module whether it is OK.

Accordingly, the CPU 20 of the floppy disk module 2 which has received the power-off request signal detects the current operation state, that is, whether or not the drive is currently being accessed, and generates a signal indicating the drive state.
Either an access signal indicating that the current data is being written or read or a non-access signal indicating that the drive is not currently being accessed is transmitted to the CPU 10 of the electronic musical instrument 1.

The floppy disk module 2 temporarily writes data from the electronic musical instrument 1 to a buffer, then reads out the data from the buffer and writes the data in order to a floppy disk. If the power is turned off during such processing, accurate reading and writing of data may not be possible, or in the worst case, the data itself may be destroyed. The next step 3 until the write processing and the read processing are completed and the floppy disk drive 25 is in the non-access state.
The power off function is controlled so as not to operate by the processing of B and 3C. Since the power may be turned off in the non-access state, the non-access signal is referred to as a power-off completion signal.

Step 3B: It is monitored whether the signal indicating the operating state output from the CPU 20 of the floppy disk module 2 is an access signal or a non-access signal (power-off completion signal). That is, whether the floppy disk module 2 is currently performing a data write operation,
It monitors whether the data is being read or not. Step 3C: It is determined whether or not the signal indicating the operation state from the CPU 20 is a power-off completion signal (non-access signal). If the signal is a power-off completion signal (YES), the process proceeds to the next step 3D to perform power-off processing. Execute. If not (NO), the process returns to step 3B, and steps 3B, 3C until the signal indicating the operating state from the floppy disk module 2 becomes the power-off completion signal.
Is repeated.

Step 3D: The power supply means 1c is instructed to stop supplying power to each peripheral device (in this embodiment, the floppy disk module 2). The power supply means 1c receiving the instruction to stop the power supply supplies the electronic musical instrument 1
The supply of power to the peripheral devices connected to the electronic musical instrument 1 as well as the components within the electronic musical instrument 1 is simultaneously stopped. Step 3E: The power-on interrupt flag set in step 2A of FIG. 2 is set to “0” so that power-on interrupts generated thereafter can be handled as valid. Step 3F: Enter a sleep mode in which a power-on interrupt can be detected, and end the power-on interrupt process of FIG. C
Thereafter, the PU 10 enters the sleep mode and constantly monitors only the occurrence of the power-on interrupt. CPU1
Since 0 only monitors the occurrence of a power-on interrupt, power consumption can be minimized. In order to completely terminate the operation of the CPU 10, the main switch provided in the power supply means may be set to off.

FIG. 4 is a diagram showing an example of the "communication process" of FIG. The CPU 10 processes this communication processing in the following steps in order. Note that CP
It is assumed that data is exchanged between U10 and CPU 20 via a buffer memory (not shown).

Step 4A: Since the data transmitted from the CPU 20 of the floppy disk module 2 is temporarily stored in the buffer memory of the CPU 10, the contents of the data stored in the buffer memory are scanned. Step 4B: As a result of the data scan, it is determined whether or not transmission data from the CPU 20 exists in the buffer memory. If transmission data exists (YES), the process proceeds to the next step 4C; otherwise (NO). It returns to step 2L of FIG.

Step 4C: It is determined whether or not the transmission data from the CPU 20 is a counter clear request signal.
Step 4 if the counter clear request signal (YES)
Go to D, otherwise (NO), go to step 4E. Here, the counter clear request signal is a signal that the CPU 20 outputs to the CPU 10 when any operation element on the switch unit 27 of the floppy disk module 2 is operated, that is, the switch unit 27 of the floppy disk module 2 It is also a signal indicating that the operation has been performed. Step 4D: Upon receiving this counter clear request signal, the CPU 10 clears the counter for auto power off so that the power off process in step 2M in FIG. 2 is not executed, and then returns to step 2L in FIG.

Step 4E: It is determined whether or not the transmission data from the CPU 20 is a bulk dump request signal. If the received data is a bulk dump request signal (YES), the process proceeds to step 4F, and if not (NO), the process proceeds to step 4J. .
Here, the bulk dump request signal is generated when the data save switch SAVE-SW of the switch unit 27 of the floppy disk module 2 is operated.
Is a signal output to the CPU 10 from the electronic musical instrument 1 to request that all of the bulk data stored in the RAM 12 of the electronic musical instrument 1 be transmitted to the floppy disk module 2 and that the bulk data be stored on the floppy disk. is there.

Step 4F: Since it was determined in the previous step 4E that the transmission data was a bulk dump request signal,
Here, the CPU 20 of the floppy disk module 2
A MIDI off request signal is transmitted to the CPU 20 in order to prevent MIDI data from being output via the CPU 20. The floppy disk module 2 has an original function as a floppy disk device for writing data to a floppy disk and reading data from a floppy disk, and a function as a MIDI interface. Therefore, when writing the bulk data of the electronic musical instrument 1 to the floppy disk by the pulse dump processing, the data should be interpreted as data for the floppy disk module 2,
There is no need to output it as data to the outside. Therefore, the CPU 20, which has received the MIDI off request signal, sets the MIDI output inhibition flag MIDIOUT at step 6H in FIG.
Is reset to "0" to prohibit the output of MIDI data to the outside.

Step 4G: The floppy disk module 2 executes a bulk dump process of storing all of the bulk data stored in the RAM 12 of the electronic musical instrument 1 on a floppy disk. Step 4H: Since the bulk dump processing of step 4G has been completed, the CP of the floppy disk
A MIDI on request signal is transmitted to the CPU 20 so that MIDI data can be output via the U20,
It returns to step 2L of FIG. Upon receiving the MIDI on request signal, the CPU 20 proceeds to step 6F in FIG.
To set the MIDI output prohibition flag MIDIOUT to "1" to release the prohibition of MIDI data output to the outside.

Step 4J: It is determined whether or not the transmission data from the CPU 20 is bulk data. If the data is bulk data (YES), the process proceeds to step 4K, otherwise (NO), the process proceeds to step 4L. Here, the bulk data is data output from the CPU 20 to the CPU 10 when the data load switch LOAD-SW of the switch unit 27 of the floppy disk module 2 is operated, and the bulk data stored on the floppy disk. It is data.

Step 4K: Since it is determined in the previous step 4J that the transmission data is bulk data, here, the bulk data is written into the RAM 12 of the electronic musical instrument 1, and the process returns to step 2L of FIG. Step 4L: Since it is determined in the previous step 4J that the transmission data is not the bulk data, it means that the transmission data is MIDI data input from the outside via the CPU 20, so that the normal MIDI data is used here. And the process returns to step 2L of FIG.

FIG. 5 is a diagram showing an example of "floppy disk module start processing" which is performed by the CPU 20 of the floppy disk module 2. This floppy disk module start processing is performed by the power supply means 1c.
Start by receiving power supply from. That is, when the CPU 10 starts the power-on interrupt processing of FIG. 2, this floppy disk module start processing also starts executing at the same time. The CPU 20 sequentially performs the floppy disk module start processing in the following steps.

Step 5A: An initializing process is performed by setting initial values in registers, flags, and the like in the RAM 22 of the floppy disk module 2. Step 5B: CPU 10 of electronic musical instrument 1 (main CP)
Since the data transmitted from U) is temporarily stored in the buffer memory in the CPU 20, the contents of the data stored in the buffer memory are scanned.

Step 5C: As a result of the data scan, it is determined whether or not transmission data from CPU 10 exists in the buffer memory, and transmission data exists (YES).
If so, proceed to the next step 5D, otherwise (NO), proceed to step 5E. Step 5D: Perform data processing according to the transmission data from the CPU 10. Details of this data processing are shown in FIG.

Step 5E: Each switch (data load switch LOAD-SW and data save switch SAV) on the switch section 27 of the floppy disk module 2
The operation state of the E-SW or the like is scanned. Step 5F: As a result of the switch scan, it is determined whether or not there is a switch event. If there is a switch event (YES), the process proceeds to the next step 5G, and if not (NO), the process returns to step 5B. Step 5G: Since it was determined in the previous step 5F that there was a switch event, a switch process corresponding to the switch event is executed here. The details of this switch processing are shown in FIG.

Step 5H: In the previous step 5G, the switch unit 27 was operated, so that some switch processing was executed. Therefore, the electronic musical instrument 1 measures a predetermined time from the time when the switch unit 27 of the floppy disk module 2 was operated. A counter reset request signal is sent to the CPU 10 to cause the power-off counter to perform the operation, and the process returns to step 5B. The CPU 10 receiving the counter reset request signal clears the auto power-off counter (power-off counter) by executing steps 4A to 4D in FIG.

FIG. 6 is a diagram showing an example of the "data processing" of step 5D in FIG. 5, which is performed by the CPU 20 of the floppy disk module 2. The CPU 20 executes this data processing sequentially in the following steps.

Step 6A: It is determined whether or not the transmission data from the CPU 10 of the electronic musical instrument 1 is a power-off request signal. If the signal is a power-off request signal (YES), the process proceeds to step 6B, otherwise (NO). Step 6E
Proceed to. Here, the power-off request signal is a signal transmitted from the CPU 10 to the floppy disk module 2 in the process of step 3A in FIG. 3, and the power-off key is operated or the panel switch 17 (the floppy disk module This signal is output when no operation is performed on the second switch unit 27), and inquires of the floppy disk module 2 whether or not the power of the power supply unit 1c on the main body side may be turned off. Is a signal for

Step 6B: Upon receiving this power-off request signal, the CPU 20 detects the current drive state, that is, whether or not the floppy disk drive 25 is being accessed. Step 6C: It is determined whether or not the drive state detected in the previous step 6B is being accessed (currently, the data is being written or read), and the access is being made (Y
In the case of ES), after transmitting the access signal to the CPU 10, the process returns to the step 6B, and repeats the processes of the steps 6B and 6C until the non-access state is reached. move on.

Step 6D: CPU 10 of electronic musical instrument 1
A power-off completion signal is transmitted to the (main CPU), and the process returns to step 5E in FIG. Upon receiving the power-off completion signal, the CPU 10 of the electronic musical instrument 1 executes the processing of steps 3D to 3F in FIG. 3, stops the power supply to each peripheral device, and enters the sleep mode.

Step 6E: It is determined whether or not the transmission data from the CPU 10 of the electronic musical instrument 1 is a MIDI on request signal. If the data is a MIDI on request signal (YES), the process proceeds to step 6F, otherwise (NO). Proceed to step 6G. Step 6F: MIDI output inhibition flag MIDIOUT
Is set to "1" to prohibit the output of MIDI data to the outside.

Step 6G: It is determined whether or not the transmission data from the CPU 10 of the electronic musical instrument 1 is a MIDI off request signal. If the data is a MIDI off request signal (YES), the process proceeds to step 6H, otherwise (NO). Proceed to step 6J. Step 6H: MIDI output inhibition flag MIDIOUT
Is set to "0" to prohibit the output of MIDI data to the outside.

Step 6J: It is determined whether or not the transmission data from the CPU 10 of the electronic musical instrument 1 is bulk data. If the data is bulk data (YES), proceed to step 6K, otherwise proceed to step 6L. . Step 6K: Since the transmission data was determined to be bulk data in the previous step 6J, the bulk data is stored in the RAM 22 of the floppy disk module 2 here.
The bulk data buffered in the RAM 22 is sequentially transferred to the floppy disk drive 25 and stored in the floppy disk, and the process returns to step 5E in FIG.

Step 6L: MIDI output inhibition flag M
It is determined whether or not IDIOUT is “1”, and “1” is determined.
If (YES), proceed to the next step 6M, otherwise (NO), return to step 5E of FIG. Step 6M: The transmission data from the CPU 10 of the electronic musical instrument 1 is output to the outside via the CPU 20 as a MIDI signal, and the process returns to step 5E of FIG.

FIG. 7 shows a floppy disk module 2
FIG. 6 is a diagram illustrating an example of “switch processing” in step 5G of FIG. 5 that is processed by the CPU 20 of FIG. This switch process
This processing is performed when it is determined in step 5F that there is a switch event as a result of scanning the operation state of each switch on the switch unit 27 in step 5E of FIG.
The CPU 20 executes this switch process sequentially in the following steps.

Step 7A: It is determined whether or not the switch event is an ON event of the data load switch LOAD-SW. If the switch event is an ON event (YES), the process proceeds to Step 7B; otherwise (NO), Step 7 is performed.
Go to C. Step 7B: Since it is determined in the previous step 7A that the event is the ON event of the data load switch LOAD-SW, the bulk data stored in the floppy disk is stored in the RAM of the floppy disk module 2 here.
22 and temporarily stores the bulk data buffered in the RAM 22 in the CPU of the electronic musical instrument 1.
10 (main CPU), and returns to step 5H in FIG. Electronic musical instrument 1 receiving this bulk data
CPU 10 sequentially writes the bulk data received in step 4K of FIG.

Step 7C: It is determined whether or not the switch event is an ON event of the data save switch SAVE-SW. If the switch event is an ON event (YES), the process proceeds to Step 7D. If not (NO), Step 7 is performed.
Go to E. Step 7D: Since it is determined in the previous step 7C that the event is the ON event of the data save switch SAVE-SW, the bulk dump request signal is transmitted to the C of the electronic musical instrument 1 here.
This is transmitted to the PU 10 (main CPU), and the process returns to step 5H in FIG. Upon receiving the bulk dump request signal, the CPU 10 of the electronic musical instrument 1 proceeds to step 4F in FIG.
4H, and all the bulk data stored in the RAM 12 of the electronic musical instrument 1 is stored on the floppy disk by the floppy disk module 2. Step 7E: As a result of the determination in steps 7A and 7C, the switch event is set to the data load switch LOAD-SW.
Since it is determined that the event is not an ON event of the data save switch SAVE-SW, a switch process corresponding to an ON event other than these switches is executed, and the process returns to step 5H of FIG.

Although the processing between the electronic musical instrument 1 and the floppy disk module 2 has been described in the above embodiment, the same processing is performed between the electronic musical instrument 1 and the MIDI keyboard 3. In this case, if the MIDI keyboard 3 does not have its own power supply,
Electronic musical instrument 1 as well as floppy disk module 2
Power is supplied from the power supply means 1c via the power line. Then, as long as one of the keys or the panel switch is operated, the operation is performed so as not to cut off the power.

When the MIDI keyboard 3 has its own power supply means, the MIDI keyboard 3 is also assumed to have an auto power-off function. The auto power-off function may be operated so as not to cut off the power. The auto power-off function of the electronic musical instrument 1 turns off the power if either one of the keys or the panel switch is operated. Instead, the power of the automatic power-off function of the MIDI keyboard 3 may be turned off when the user's keyboard or panel switch is not operated for a predetermined time regardless of the operation state of the electronic musical instrument 1.

Similarly, the floppy disk module 2
Also has its own power supply means with an auto power-off function, the auto power-off function of the electronic musical instrument 1 can turn off the power if either one of the keys, the panel switch or the switch unit is operated. The auto power-off function of the floppy disk module 2 is not performed, and the power supply may be turned off when the electronic musical instrument 1 is not in the operating state for a predetermined time regardless of the operating state of the electronic musical instrument 1 or when the switch unit is not operated. Good.

In the above-described embodiment, the type in which the floppy disk module 2 is built in the electronic musical instrument 1 has been described. However, the present invention is not limited to this, and the type that is externally attached to the electronic musical instrument 1 may be used. . In addition, it may be either built-in, built-in as an option after the product is shipped, or shipped after being built in the factory. In other words, when a device without the floppy disk module 2 is already commercialized and shipped as the basic specification of the electronic musical instrument 1, a device with the floppy disk module 2 is newly commercialized and shipped as an improved specification later. Even in such a case, the auto power-off function can be effectively operated without contradiction as in the above-described embodiment.

[0065]

As described above, according to the present invention, even when a peripheral device is extendedly connected to an electronic musical instrument having an automatic power-off function, the peripheral device is placed in an operating state on the side of the peripheral device. The electronic musical instrument has a state signal generating means for generating a state signal indicating that the state signal is present or in the operating state. The electronic musical instrument detects the state signal generated by the state signal generating means, and detects the state signal. Control means for controlling the operation of the automatic power supply disconnection device in accordance with the conditions of the automatic power supply disconnection device, thereby efficiently and consistently taking into account the actual operation state or operation state of the peripheral device. There is an effect that the disconnection function can be operated.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a hardware configuration of an embodiment of an electronic musical instrument system according to the present invention.

FIG. 2 is a flowchart illustrating an example of a power-off interrupt process performed by a microcomputer in the electronic musical instrument of FIG. 1;

FIG. 3 is a flowchart showing a detailed example of the communication processing of FIG. 2 processed by a microcomputer in the electronic musical instrument of FIG. 1;

4 is a flowchart showing a detailed example of a power-off process of FIG. 2 processed by a microcomputer in the electronic musical instrument of FIG. 1;

FIG. 5 is a flowchart showing an example of a floppy disk module start process performed by a microcomputer in the floppy disk module of FIG. 1;

6 is a flowchart showing a detailed example of the data processing of FIG. 5 processed by the microcomputer in the floppy disk module of FIG. 1;

FIG. 7 is a flowchart showing a detailed example of the switch processing of FIG. 5 processed by the microcomputer in the floppy disk module of FIG. 1;

[Explanation of symbols]

10 CPU, 11 ROM, 12 RAM, 13 data and address bus, 14 key press detection circuit, 15 keyboard, 16 switch detection circuit, 17 panel switch,
18 display circuit, 19 display unit, 1a sound source circuit, 1b
... Sound system, 1c ... Power supply means, 20 ... C
PU, 21 ROM, 22 RAM, 23 data and address bus, 24 floppy disk control circuit, 2
5 floppy disk drive, 26 switch detection circuit, 27 switch unit, 28 display circuit, 29 display unit, 30 CPU, 31 ROM, 32 RAM, 33
... data and address bus, 34 ... key press detection circuit, 35
... keyboard, 36 ... switch detection circuit, 37 ... switch part,
38: display circuit, 39: display unit

Claims (1)

[Claims] 1. An electronic musical instrument having an automatic power-off device for automatically turning off a power supply according to whether or not the electronic musical instrument is operated, and a peripheral device extendedly connected to the electronic musical instrument. In the electronic musical instrument system, the peripheral device includes a state signal generating unit that generates a state signal indicating that the peripheral device is in an operating state or an operating state, and the electronic musical instrument includes the state signal generating unit. An electronic musical instrument system comprising: a control unit that detects the status signal generated by the control unit and controls the operation of the automatic power supply disconnection device in accordance with the detection of the status signal.