JP3695337B2 - Operation speed information output method, operation speed information output device, and recording medium - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an operation speed information output method, an operation speed information output device, and a recording medium used for detecting an operation state of an electronic musical instrument, and more particularly to an operation speed information output method and an operation speed suitable for use in detecting an operation state of a key. The present invention relates to an information output device and a recording medium.
[0002]
[Prior art]
Conventionally, a key used for an electronic keyboard instrument or the like has been provided with sensors for detecting key positions at a plurality of locations in order to detect a key speed or the like. When the sensor is constituted by a mechanical contact, for example, first and second contacts that are sequentially turned on as the key is pressed are provided, and the key pressing speed is determined by measuring the interval at which both contacts are turned on. The key release speed can be detected by measuring the interval at which both contacts are turned off.
[0003]
In recent years, in order to reduce the manufacturing cost of a keyboard and to ensure accuracy, a technique has been proposed in which a contact is formed by an elastically deformable member (Japanese Patent Laid-Open No. 8-235595). One example will be described with reference to FIG. FIG. 4A is a longitudinal sectional view of a contact portion, and FIG. In this example, the movable contact side is composed of a first movable contact 25 formed at the tip of the pressing portion 29 and a donut-shaped second movable contact 26 that is continuous in a cylindrical shape. Further, the fixed contact 6 is a substantially cross-shaped radial pattern, and is formed by forming a central inner pattern 1, an outer outer pattern 2, and an intermediate common pattern 3 at predetermined intervals. It is.
[0004]
The inner pattern 1 and the common pattern 3 constitute an inner pair 4, and the outer pattern 2 and the common pattern 3 constitute an outer pair 5. Each pattern 1, 2 and 3 is connected to an external wiring pattern through contact terminal portions T1, T2 and T3, respectively, through which the inner pattern 1 and the outer pattern 2 are connected to ground through a resistor, and the common pattern 3 is Connected to the power supply voltage V. The inner pattern 1 and the outer pattern 2 are connected to a voltage detection circuit (not shown), and are used for various musical tone control, for example.
[0005]
In the two-make switch 27 having such a configuration, when the pressing portion 29 is pressed and the switch is pressed down, the circular first movable contact 25 at the center first comes into contact with the inner pair 4 and closes the contact terminals T1 and T3. . By further depressing the switch, the donut-shaped second movable contact 26 abuts over all of the inner pattern 1, the outer pattern 2 and the common pattern 3, and the contact terminals T1 and T2 of the outer pair 5 are closed. At the same time, the contact terminals T1 and T3 closed by the first movable contact are further closed.
[0006]
[Problems to be solved by the invention]
However, when a member that elastically deforms as described above is used for the contact, chattering in a manner that has not been considered in the past occurs due to the complicated behavior of the contact portion. The present invention has been made in view of the above circumstances, and provides an operation speed information output method, an operation speed information output device, and a recording medium that enable accurate operation detection without any problem even if chattering occurs. It is an object.
[0007]
[Means for Solving the Problems]
In order to solve the above problems, the present invention is characterized by having the following configuration. The parentheses are examples.
Claim 1 In the configuration described above, the detection states of the first and second operation detection means are changed by using the first and second operation detection means whose detection states are changed by the operation (key depression) of the operation element. An operation speed information output method for outputting operation speed information of the operation element based on a time interval to be operated, wherein the first operation detection means is changed from a first state (off state) to a second state (on state). ) (First detection of the first contact point in FIG. 4 (c)) to detect time, and after the first detection process, the first operation detecting means A second detection step of detecting a change from the second state (on state) to the first state (off state) (first off of the first contact in FIG. 4 (c)); After the detection process, the first operation detecting means changes from the first state (off state) to the second state (on state). 3) is detected, the time measurement started in the first detection process is cleared and the time measurement is started again. And, after the third detection process, a fourth detection process for detecting a change in the state of the second operation detection means (turning on the second contact in FIG. 4C), and time measurement in the fourth detection process And an output process for outputting the operation speed information based on the result.
Claims 2 In the configuration described, Using the first and second operation detection means whose detection state changes according to the operation of the operation element, the operation speed of the operation element is based on the time interval at which the detection state of the first and second operation detection means changes. An operation speed information output device for outputting information, wherein the first operation detection means detects a change from the first state to the second state and starts time measurement; and After the first detection means starts the time measurement, a second detection means for detecting a change from the second state to the first state of the first operation detection means, and the second detection means After detecting a change from the second state to the first state, the first operation detecting means detects a change from the first state to the second state. Clear time measurement started in detection means and measure time again A third detection unit that starts, a fourth detection unit that detects a state change of the second operation detection unit after the time measurement is started again by the third detection unit, and the fourth detection unit Output means for outputting the operation speed information based on a time measurement result when a state change of the second operation detection means is detected. It is characterized by that.
Claims 3 In the configuration described, Using the first and second operation detection means whose detection state changes according to the operation of the operation element, the operation speed of the operation element is based on the time interval at which the detection state of the first and second operation detection means changes. A recording medium recording a program for causing a computer to execute a process of outputting information, wherein the program detects a change from the first state to the second state by the first operation detecting unit and detects a time. A first detection process for starting measurement; and a second detection process for detecting a change from the second state to the first state of the first operation detecting means after the first detection process; After detecting the change of the first operation detecting means from the first state to the second state after the second detection step, the time measurement started in the first detection step is cleared. Third test to start time measurement again And a fourth detection process for detecting a change in state of the second operation detection means after the third detection process, and an output for outputting the operation speed information based on a time measurement result in the fourth detection process. Causing the computer to execute the process The program is memorized.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
1. Hardware configuration of the embodiment
Next, the hardware configuration of the electronic keyboard instrument of one embodiment of the present invention will be described with reference to FIG.
In the figure, reference numeral 52 denotes a keyboard on which a plurality of keys are arranged. As described with reference to FIG. 8, each key has a first contact 10 (1st Make) that is first turned on when the key is depressed, and a second contact 12 (2nd that is turned on when pressed further deeply). Make). Each contact is preferably arranged on a diode matrix circuit having, for example, a pitch name (C to B) as one axis and an octave number as the other axis. A key scan CPU 54 detects the state of each contact on the keyboard 52. A ROM 56 stores a control program for the key scan CPU 54. A RAM 58 is used as a work memory for the key scan CPU 54 via the bus 60.
[0009]
The key scan CPU 54, ROM 56, RAM 58 and bus 60 are mounted on one LSI (one-chip microcomputer). A system CPU 64 receives a key operation state (key-on, key-off, velocity, etc.) from the key scan CPU 54 via the internal bus 62 and controls each part in the electronic keyboard instrument via the bus 74. A ROM 66 stores a control program for the system CPU 64, various waveform data, musical tone parameters, and the like. Reference numeral 68 denotes a RAM which is used as a work memory for the system CPU 64. Reference numeral 70 denotes an operation display unit that displays various types of information to the user and can set various operation modes and the like. Reference numeral 72 denotes a sound source unit that synthesizes a musical sound signal based on a command from the system CPU 64.
[0010]
2. Data structure of the embodiment
Next, the data structure stored in the ROM 56 and the RAM 58 will be described with reference to FIG.
In FIG. 6A, the ROM 56 is provided with a CPU program area 562 for storing a control program for the key scan CPU 54 and a preset data area 564 for storing various timing information described later. It is. In FIG. 6B, a CPU work area 582 is provided at the head of the RAM 58, and thereafter, a TDC area 584, a MASKTM area 586, an RTRGTM area 588, and a status register area 590 are sequentially provided. .
[0011]
In FIG. 5B, a TDC area 584 is provided for measuring the velocity of the key, and until the second contact 12 is turned on after the first contact 10 of the key is turned on. In other words, a time difference measurement counter TDC that counts the number of times the timer interrupt has occurred is stored. In this embodiment, after the key scan CPU 54 transmits a key-on signal, it is prohibited to transmit a key-off signal signal related to the key for a certain mask time. The MASKTM area 586 stores a mask timer MASKTM for counting the mask time.
[0012]
Further, in the present embodiment, when the on / off state of the first contact 10 frequently changes, various controls are performed using the transition to the on state that occurs last. For example, when the first contact 10 transitions to the on state, transitions to the off state, and then transitions to the second on state, the interval between the transition to the off state and the transition to the second on state is within a predetermined time. Then, the velocity is calculated based on the timing of the second on state. The RTRGTM area 588 stores a retrigger timer RTRGTM that is incremented every time a timer interrupt occurs in order to make such a determination.
[0013]
A status register area 590 is provided at the end of the RAM 58. Here, a status register STATUS for storing the state of each key is provided. Each key in the keyboard 52 is given a key number Kn (Kn = K1,... Ke), and a status register STATUS is provided on a one-to-one basis corresponding to each key. Therefore, the status register corresponding to the key number Kn is expressed as “STATUS (Kn)”. On the other hand, the time difference measurement counter TDC, the mask timer MASKTM, and the retrigger timer RTRGTM are provided in a number smaller than the total number of keys, and are assigned corresponding to the key number Kn as necessary. Therefore, these are also expressed as “TDC (Kn)”, “MASKTM (Kn)”, “RTRGTM (Kn)” corresponding to the key number Kn.
[0014]
Next, the contents of each status register STATUS (Kn) will be described with reference to FIG. The 0th bit (least significant bit) of the status register is a bit indicating whether or not the first contact 10 of the key is in an ON state, and “1” indicates that it is in an ON state. The first bit is a bit indicating whether or not the second contact 12 of the key is in an ON state, and “1” indicates that it is in an ON state. The second bit is a bit indicating whether or not a key-on signal has been transmitted to the system CPU 64, and “1” indicates that transmission has been completed. The third bit is a bit indicating whether or not a key-off mask state, that is, a state in which key-off transmission is prohibited, and “1” is a mask state (a state in which key-off transmission is prohibited). It shows that.
[0015]
The fourth bit is a bit indicating whether or not velocity is being measured, and “1” indicates that measurement is being performed. The fifth bit is a bit indicating whether or not there is a key-off / transmission miss state, and is set to “1” when transmission of the key-off signal from the key scan CPU 54 to the system CPU 64 fails. Hereinafter, in this specification, the contents of the status register STATUS (Kn) are arranged in the order of the fifth bit to the 0th bit and expressed as “010001”.
[0016]
3. Operation of the embodiment
3.1. Hibernation
Next, the operation of this embodiment will be described.
First, when the power of the electronic keyboard instrument is turned on, the main routine shown in FIGS. 5 and 6 is executed in the key scan CPU 54. In the figure, when the process proceeds to step SP2, predetermined initial setting is performed, and the key number Kn is set to an initial value, that is, "1". Next, in steps SP4 to SP14, the process branches according to the contents of the status register STATUS (Kn). First, since the status register STATUS (Kn) is “000000” in a state where the key of the key number Kn is released, the process proceeds to step SP16 via step SP4.
[0017]
Here, it is determined whether or not the first contact 10 with the key number Kn is in an ON state. If the key of the key number Kn is not pressed at all, it is determined as “NO” here, and the process proceeds to step SP72. Here, it is determined whether or not the processing of steps SP4 to SP70 has been completed for all key numbers Kn. If not completed yet, it is determined as “NO”, the process proceeds to step SP74, the key number Kn is incremented by “1”, and the process returns to step SP4. Then, the processing after step SP4 is executed again based on the incremented key number Kn. Thereafter, the key number Kn is continuously incremented, and when the process proceeds again to step SP72 after the key number Kn reaches the final key number Ke, it is determined as “YES” here. As a result, the process returns to step SP2, and the key number Kn is set to “1” again. Thereafter, the same operation is repeated.
[0018]
3.2. Normal key operation
3.2.1. Key press
Next, an operation for a key operation in a state where chattering does not occur will be described. When the key with the key number Kn is depressed, the first contact 10 is turned on. Thereafter, when the process proceeds to step SP16, this is detected. Thereby, it determines with "YES" here and a process progresses to step SP18. Here, it is determined whether or not the time difference measurement counter TDC (Kn) can be assigned to the key number Kn, that is, whether or not there is an empty time difference measurement counter. If the allocation is possible, the process proceeds to step SP20 and the allocation process is performed.
[0019]
Next, when the process proceeds to step SP22, “0” is set as the value (initial value) of the time difference measurement counter TDC (Kn), and the state is set to the START state (measurement state). Next, when the process proceeds to step SP24, the status register STATUS (Kn) is set to “010001”. That is, the 0th bit is set to “1” because the first contact 10 is turned on, and the fourth bit is set to “1” because the velocity measurement using the time difference measurement counter TDC (Kn) is started. It is set to. When the above steps are completed, the process proceeds to step SP72, and the process related to the next key number Kn + 1 or the first key number K1 is executed.
[0020]
Thereafter, when the process proceeds to step SP4 after the key number becomes Kn again, the process proceeds to step SP8 via step SP6. Here, it is determined whether or not the status register STATUS (Kn) is “010001”. If “YES” is determined here, the process proceeds to step SP32 to determine whether or not the first contact 10 of the key number Kn is in an OFF state. In a normal key pressing operation, since the first contact 10 is not turned off in this state, it is determined as “NO”, the process proceeds to step SP38, and it is determined whether or not the second contact 12 is turned on. The If the second contact 12 is still in the off state, “NO” is determined here, and the process returns to step SP74. Thereafter, in the processing of the main routine for the key number Kn, the steps described above are repeated and no substantial processing is performed.
[0021]
In this embodiment, a timer interrupt occurs every predetermined time, and the timer processing routine shown in FIG. 7 is started. In the figure, when the process proceeds to step SP102, an initial value, that is, “1” is set to the key number Kn. The key number Kn in this routine is another variable having a different scope from the key number Kn in the main routine.
[0022]
Next, when the process proceeds to step SP104, it is determined whether or not the time difference measurement counter TDC (Kn) is set to the START state. If "YES" is determined here, the process proceeds to step SP106 to determine whether or not the status register STATUS (Kn) is a value other than "010000". In the above example, since the status register STATUS (Kn) is set to “010001” in step SP24, “YES” is determined, and the process proceeds to step SP108.
[0023]
Here, it is determined whether or not the value of the time difference measurement counter TDC (Kn) is less than the maximum time difference value TDCmax. If “YES” is determined here, the counter TDC (Kn) is incremented by “1” in step SP110. On the other hand, if “NO” is determined, step SP110 is skipped, and the value of the counter TDC (Kn) is held. Next, when the process proceeds to step SP116, it is determined whether or not the mask timer MASKTM (Kn) is set to start. At this time, since the mask timer MASKTM (Kn) is not set to start, it is determined “NO”, and the process proceeds to step SP126. Here, it is determined whether or not the retrigger timer RTRGTM (Kn) is set to start. At this time, since the re-trigger timer RTRGTM (Kn) is not set to start, it is determined “NO”, and the process proceeds to step SP136.
[0024]
In step SP136, it is determined whether or not the key number Kn has reached the final key number Ke. If "NO" is determined here, the process proceeds to step SP138, the key number Kn is incremented by "1", and the processes after step SP104 are repeated for the new key number Kn. On the other hand, if the processing after step SP104 is completed for all key numbers Kn and the key number Kn has reached the final key number Ke, “YES” is determined in step SP136, and the processing returns to the main routine.
[0025]
In the main routine (FIGS. 5 and 6), as long as the second contact 12 with the key number Kn is in an OFF state, the loop through steps SP8, SP32 and SP38 is repeated, and no substantial processing is performed. As described above, the counter TDC (Kn) is sequentially updated by the timer processing routine. Thereby, the elapsed time after the first contact 10 is turned on is measured with the maximum time difference TDCmax as a limit. Thereafter, when the key with the key number Kn is further pressed down and the second contact 12 is turned on, “YES” is determined in the step SP38, and the process proceeds to a step SP40.
[0026]
In step SP40, the time difference measurement counter TDC (Kn) is set to the STOP state, and the subsequent counting process is prohibited. Further, in step SP40, the velocity VEL (Kn) is obtained based on the contents of the counter TDC (Kn). Specifically, the velocity VEL (Kn) is obtained by calculation with respect to the counter TDC (Kn), table reference, or a combination thereof. Next, when the process proceeds to step SP42, a key-on signal is transmitted from the key scan CPU 54 to the system CPU 64 with the key number Kn and velocity VEL (Kn). As a result, like the known electronic musical instrument, the system CPU 64 synthesizes the musical sound signal and generates the musical sound signal via the sound source unit 72.
[0027]
3.2.2. Key release mask
Next, when the process proceeds to step SP46, the value of the mask timer MASKTM (Kn) of the key number Kn is set to “0”, and the mask timer MASKTM (Kn) is set to the START state. Next, when the process proceeds to step SP48, the content of the status register STATUS (Kn) is set to “001111”. That is, the content of the status register STATUS (Kn) was originally “010001”, but since the second contact 12 of the key is turned on, the first bit is set to “1”, and the key-off / mask state, that is, the key-off state is set. Since the transmission is prohibited, the third bit is set to “1” and the fourth bit is set to “0” because the velocity measurement is completed.
[0028]
When the status register STATUS (Kn) becomes “001111”, it is determined as “NO” in any of the steps SP4 to SP4. Therefore, the key number Kn is substantially determined in the main routine (FIGS. 5 and 6). Will not be processed properly. Even in this case, a timer interrupt occurs every predetermined time, and the timer processing routine (FIG. 7) is started. Since the counter TDC (Kn) is set to the STOP state in step SP40 first, when the process proceeds to step SP104 in FIG. 7, “NO” is determined here, and the process proceeds to step SP116.
[0029]
In the previous step SP46, the mask timer MASKTM (Kn) is set to the START state, and therefore, “YES” is determined in step SP116. Next, when the process proceeds to step SP118, the mask timer MASKTM (Kn) is incremented by “1”. Next, when the process proceeds to step SP120, it is determined whether or not the status register STATUS (Kn) is “001111”. First, in step SP48, the status register STATUS (Kn) is set to “001111”, so that “YES” is determined here.
[0030]
Next, when the process proceeds to step SP122, it is determined whether or not the value of the mask timer MASKTM (Kn) is equal to or greater than the mask timer maximum value MASKTMmax. The mask timer maximum value MASKTMmax is determined in advance based on the key structure and the like. If the value of the mask timer MASKTM (Kn) has not yet reached the mask timer maximum value MASKTMmax, it is determined “NO”, and the process proceeds to step SP126. Here, since the re-trigger timer RTRGTM (Kn) has not yet been set to start, it is determined “NO”, and the process proceeds to step SP136.
[0031]
As described above, when the status register STATUS (Kn) becomes “001111”, the mask timer MASKTM (Kn) related to the key number Kn is incremented every time a timer interrupt occurs. Other than that, no substantial processing is performed on the key number Kn, and even if the state of the first and second contacts 12 changes, the processing is not affected. Eventually, when the mask timer MASKTM (Kn) reaches the mask timer maximum value MASKTMmax, “YES” is determined in step SP122, and the process proceeds to step SP124. Here, the status register STATUS (Kn) is set to “000111”. That is, the third bit is set to “0” to cancel the key-off mask state and enable transmission of the key-off signal.
[0032]
3.2.3. Key release
When the status register STATUS (Kn) is set to “000111”, “YES” is determined thereafter in step SP12 of the main routine, and the process proceeds to step SP56. Here, it is determined whether or not the second contact 12 is in an off state. If it is not in the off state, it is determined as “NO”, and the process proceeds to step SP72. Accordingly, no substantial processing is performed in such a state.
[0033]
Here, when the key release of the key number Kn is started, the second contact 12 is eventually turned off. Thereafter, when the process proceeds to step SP56, “YES” is determined here, the process proceeds to step SP58, and the status register STATUS (Kn) is set to “000101”. That is, since the second contact 12 is turned off, the first bit is set to “0”.
[0034]
Thereafter, in the main routine, for the key number Kn, the process proceeds to step SP60 via step SP14. Here, it is determined whether or not the second contact 12 is turned on. In the normal key release state, the second contact 12 once turned off is not turned on. Therefore, it is determined as “NO” here, and the process proceeds to step SP64 to determine whether or not the first contact 10 is in the OFF state. If the first contact 10 has not yet been turned off, “NO” is determined here, and the process proceeds to step SP72.
[0035]
Thereafter, in the main routine, for the key number Kn, steps SP14, SP60, and SP64 are repeated until the first contact 10 is turned off and no substantial processing is performed. Thereafter, when the key is further raised and the first contact 10 is turned off, “YES” is determined in step SP64, and the process proceeds to step SP66. Here, a key-off signal with a key number Kn is transmitted from the key scan CPU 54 to the system CPU 64. As a result, like the known electronic musical instrument, the system CPU 64 executes the mute processing related to the key number Kn.
[0036]
Next, when the process proceeds to step SP68, the status register STATUS (Kn) is set to “000000”, that is, the initial state. Next, when the process proceeds to step SP70, the time difference measurement counter TDC (Kn) assigned to the key number Kn is released and can be assigned to the time difference measurement of other keys.
[0037]
3.3. Operation when time difference measurement counter cannot be assigned
In step SP18 described above, it is determined whether or not the time difference measurement counter TDC (Kn) can be assigned to the key number Kn, that is, whether or not there is an empty time difference measurement counter. If the assignment is impossible, the process proceeds to step SP26, and the status register STATUS (Kn) is set to “000001”. That is, the 0th bit is set to “1” because the first contact 10 is turned on, but the 4th bit remains “0” because the velocity is not measured. .
[0038]
Thereafter, when the process after step SP4 is executed again for the key number Kn, it is determined as “YES” in step SP6, and the process proceeds to step SP28. Here, it is determined whether or not the first contact 10 is in an off state. If “NO” is determined here, no substantial processing is performed, but if “YES” is determined, the processing proceeds to step SP30 and the status register STATUS (Kn) is set to “000000” (initial state). Returned. Eventually, if the counter TDC (Kn) cannot be assigned, no key-on signal or key-off signal is transmitted to the system CPU 64 in response to the key operation, and no sound is produced.
[0039]
3.4. Processing for shallow key press operations
When a shallow key pressing operation is performed, the first contact 10 is first turned on, the second contact 12 is not turned on, and the first contact 10 is turned off after a relatively long time has elapsed. become. The operation in such a case will be described. First, if the first contact 10 is turned on in the initial state (status register STATUS (Kn) = “000000”) and the time difference measurement counter TDC (Kn) can be allocated, the above steps SP20 to SP24 are performed. Through the processing, the status register STATUS (Kn) is set to “010001”.
[0040]
Next, until the change appears at the first or second contact 12, the determination of steps SP8, SP32, and SP38 is executed for the key number Kn, but no substantial processing is executed in the main routine. During this period, the counter TDC (Kn) is incremented by “1” every time a timer interrupt occurs. If the first contact 10 is turned off, “YES” is determined in step SP32, and the process proceeds to step SP34.
[0041]
Here, the value of the retrigger timer RTRGTM (Kn) is set to “0”, and the retrigger timer RTRGTM (Kn) is set to the START state. Next, when the process proceeds to step SP36, the status register STATUS (Kn) is set to “010000”. That is, since the first contact 10 is turned off, the 0th bit is set to “0”. However, since this is merely a possibility of chattering, the 4th bit is set to continue the velocity measurement state. It is held as “1”.
[0042]
Next, when the processing after step SP4 is executed again in the main routine, it is determined as “YES” in step SP10, and the processing proceeds to step SP50. Here, it is determined whether or not the first contact 10 is on. Here, since the first contact 10 has already been turned off, it is determined as “NO”, and the process proceeds to step SP72 via step SP38. Thereafter, similarly, in the main routine, steps SP10, SP50, and SP38 are repeated for the key number Kn, but no substantial processing is executed.
[0043]
On the other hand, in the above example, since the counter TDC (Kn) is set to the START state and the status register STATUS (Kn) is set to “010000”, when the timer processing routine is called, the process goes through steps SP104 and SP106. Proceed to step SP112. Here, it is determined whether or not the count result of the counter TDC (Kn) (that is, the interval at which the first contact 10 is turned on / off) is less than a predetermined chattering threshold TDCchtr. Note that the chattering threshold TDCchtr is set to the maximum chattering cycle (for example, 30 msec) that normally occurs.
[0044]
When the first contact 10 is turned on / off by a shallow key pressing operation, the count result of the counter TDC (Kn) is sufficiently larger than the chattering threshold TDCchtr. Therefore, it is determined as “NO” in step SP112, and the processing Advances to step SP114. Here, the time difference measurement counter TDC (Kn) is set to the STOP state and released, and the status register STATUS (Kn) is set to “000000”, that is, the initial state. As described above, for a shallow key pressing operation in which the second contact 12 is not turned on, neither a key-on signal nor a key-off signal is transmitted to the system CPU 64, so that no sound is generated.
[0045]
3.5. Processing when chattering occurs at the first contact 10
Next, processing when chattering occurs at the first contact 10 will be described. When chattering occurs at the first contact 10, on / off is repeated at the first contact 10 before the second contact 12 is turned on.
First, when the first contact 10 is first turned on in the initial state (status register STATUS (Kn) = “000000”), as in the case where the “shallow key pressing operation” is performed, the corresponding key number Kn. Is assigned a time difference measurement counter TDC (Kn), and the status register STATUS (Kn) is set to “010001” through the processing of steps SP20 to SP24. Thereafter, every time a timer interrupt occurs, the counter TDC (Kn) is incremented by “1”.
[0046]
Next, when the first contact 10 is turned off, the retrigger timer RTRGTM (Kn) is returned to “0” in steps SP34 and SP36, and the retrigger timer RTRGTM (Kn) is set to the START state. The status register STATUS (Kn) is set to “010000”. Next, when a timer interrupt occurs, in step SP112, it is determined whether or not the count result of the counter TDC (Kn) is less than a predetermined chattering threshold TDCchtr. When chattering occurs, the first contact 10 is frequently turned on / off, so that the count result is less than the chattering threshold TDCchtr. Therefore, here, it is determined as “YES”, the process proceeds to step SP108, and the update of the counter TDC (Kn) is continued.
[0047]
Further, when the retrigger timer RTRGTM (Kn) is set to the START state, “YES” is determined in step SP126 of the timer processing routine. Next, in step SP128, the retrigger timer RTRGTM (Kn) is incremented by “1”. Next, when the process proceeds to step SP130, it is determined whether or not the status register STATUS (Kn) is “010000”. First, since the status register STATUS (Kn) is set to “010000” in step SP36, it is determined “YES” here, and the process proceeds to step SP132. In step SP132, it is determined whether or not the value of the retrigger timer RTRGTM (Kn) is equal to or greater than the retrigger timer maximum value RTRGTMmax. If "NO" is determined here, the process proceeds to step SP136, and the timer process ends for the key number Kn.
[0048]
If the retrigger timer RTRGTM (Kn) reaches the retrigger timer maximum value RTRGTMmax, the process proceeds to step SP132, and the status register STATUS (Kn) is set to “000000”, that is, the initial state. However, as described above, in the situation where chattering occurs, the first contact 10 is frequently turned on and off, so that the first contact 10 is again turned on before the value of the retrigger timer RTRGTM (Kn) reaches the retrigger timer maximum value RTRGTMmax. Turns on. When the first contact 10 is turned on again, “YES” is determined in step SP50 of the main routine, and the process proceeds to step SP52. Here, the time difference measurement counter TDC (Kn) is set to “0”, and the counter TDC (Kn) is set to the START state again. Next, when the process proceeds to step SP54, the status register STATUS (Kn) is set to “010001”.
[0049]
Thereafter, similarly, when the first contact 10 is turned off, the retrigger timer RTRGTM (Kn) is returned to “0” in steps SP34 and SP36, and the status register STATUS (Kn) is set to “010000”. When the first contact 10 is turned on, the count result of the counter TDC (Kn) is returned to “0” in steps SP52 and SP54, and the time difference measurement counter TDC (Kn) is set to the START state again. The status register STATUS (Kn) is set to “010001”. These two states are repeated alternately while chattering continues.
[0050]
When the key with the key number Kn is further pressed down, the second contact 12 is turned on. Since the case where the chattering of the first contact 10 is completed at this time and the case where the first contact 10 is continuing can be considered, the subsequent operation will be described separately.
[0051]
3.5.1. When the second contact 12 is turned on after the chattering of the first contact 10 is completed.
When the chattering of the first contact 10 is completed, the first contact 10 is stabilized in the on state. That is, in steps SP52 and SP54, the counter TDC (Kn) is set to the START state, and the status register STATUS (Kn) is set to “010001”. As a result, the count of the counter TDC (Kn) is restarted.
[0052]
The subsequent operation is the same as in the case of “normal key operation”. That is, when the second contact 12 is turned on, “YES” is determined in step SP38, and the processes of steps SP40 to SP48 are executed. In step SP40, the velocity VEL depends on the count result of the counter TDC (Kn), in other words, the time until the second contact 12 is first turned on after the first contact 10 is finally stabilized. (Kn) is calculated and a key-on signal is transmitted to the system CPU 64.
[0053]
3.5.2. When the second contact 12 is turned on during chattering of the first contact 10
When “the first contact 10 is chattering”, there are a case where the first contact 10 is in an on state and a case where it is in an off state. If the first contact 10 is in the on state, the determination processing in steps SP8, SP32, and SP38 is repeated in the main routine, so that the second contact 12 is in the on state and the processing after step SP40 is executed. In other words, in such a case, the same process as “when the second contact 12 is turned on after the chattering of the first contact 10 is finished” is executed.
[0054]
On the other hand, if the first contact 10 is in the off state, the determination process of steps SP10, SP50, SP38 is repeated. Here, when the second contact 12 is turned on, the processing after step SP40 is executed via step SP38. Here, since the time difference measurement counter TDC (Kn) starts counting from when the first contact 10 is first turned on, the second contact after the first contact 10 is finally turned on. Velocity VEL (Kn) is calculated based on the count result until 12 is turned on.
[0055]
4). Effects of the embodiment
Hereinafter, with reference to FIG. 3 and FIG. 4, the effect of this embodiment with respect to various chattering assumed will be described. These diagrams are waveform diagrams showing the on / off states of the first and second contacts 12 with negative logic when chattering or the like occurs in various modes.
[0056]
(1) In FIG. 3 (a), the first contact 10 is turned on first, the second contact 12 is then turned on, and chattering occurs at the first contact 10 after that. Indicates. When the second contact 12 is turned on, the status register STATUS (Kn) is set to “001111” in step SP48, and further set to “000111” in step SP124 when the mask timer maximum value MASKTMmax has elapsed. In any case, since the on / off state of the first contact 10 does not affect the processing, the influence of chattering can be eliminated.
[0057]
(2) FIG. 3B shows a waveform diagram when chattering occurs at the second contact 12 after the first and second contacts 12 are sequentially turned on. As described above, when the second contact 12 is turned on, the status register STATUS (Kn) is set to “001111” and then set to “000111”. When the second contact 12 is turned off, the status register STATUS (Kn) is set to “000101” in step SP58. However, the second contact 12 is turned on again before the first contact 10 is turned off. When the state is reached, the register STATUS (Kn) is set to “000111” again through steps SP60 and SP62. Thereby, after that, the same operation as the case where there is no chattering of the second contact 12 is executed, and the influence of chattering of the second contact 12 can be eliminated.
[0058]
(3) In FIG. 4 (a), after the first and second contacts 12 are sequentially turned on, before the mask time corresponding to the mask timer maximum value MASKTMmax elapses, A waveform diagram when chattering occurs simultaneously is shown. Here, the background in which such chattering occurs will be described.
[0059]
In a natural musical instrument piano, a hammer action is lifted by pressing a key, and a musical sound is generated when the hammer strikes a string. When the hammer action returns to the reference position, it collides with the key, and the player can feel the shock at the fingertip. Therefore, in order to reproduce such a piano touch in an electronic piano, a mechanism that gives a shock to the key is added. However, if such a shock is applied to the key, both the first and second contacts 12 may be turned off. FIG. 4A assumes such a state.
[0060]
Before the mask time elapses, the register STATUS (Kn) is set to “001111”, and the ON / OFF state of the first and second contacts 12 during this period has no effect on the processing. Therefore, chattering peculiar to a piano touch can be eliminated. Needless to say, the mask timer maximum value MASKTMmax is determined according to the characteristics of the mechanism portion that gives the piano touch.
[0061]
(4) In FIG. 4B, chattering occurs after the first contact 10 is once turned on, and the second contact 12 is turned on during the chattering when the first contact 10 is turned off. The waveform diagram in the case of Such a chattering may occur when the contact point is configured by a member that is elastically deformed as in the present embodiment. In such a case, as described in “When the second contact 12 is turned on during chattering of the first contact 10”, the second contact 12 is turned on after the first contact 10 is turned on last. Since the velocity VEL (Kn) is determined according to the time until the on state, the influence of chattering in this state can be eliminated.
[0062]
(5) FIG. 4 (c) shows a waveform diagram when the first contact 10 is stabilized in the on state after chattering occurs in the first contact 10, and then the second contact 12 is turned on. . Also in this example, since the velocity VEL (Kn) is determined according to the time from when the first contact 10 is finally turned on to when the second contact 12 is turned on, the chattering of the first contact 10 is determined. The influence of can be eliminated.
[0063]
(6) FIG. 4D shows a waveform diagram when the first contact 10 is stabilized in the ON state after the chattering occurs in the first contact 10 and the second contact 12 is held in the OFF state. In this example, after the first contact 10 is turned on, the status register STATUS (Kn) returns to “000000” on condition that the chattering threshold TDCchtr has elapsed. Therefore, when the second contact 12 is turned on within this period, it is possible to generate a key-on signal even if the first contact 10 is turned off.
[0064]
5. Modified example
The present invention is not limited to the above-described embodiment, and various modifications can be made as follows, for example.
(1) In each of the above embodiments, the key-on / key-off event detection process is performed in the key scan CPU 54. However, the above-described processes may be performed in the system CPU 64. Similarly, each component of the electronic keyboard instrument including key-on / key-off event detection processing may be configured by software operating on various computers. In this case, the software can be stored in a recording medium such as a CD-ROM or a floppy disk and distributed, or can be distributed through a transmission path.
[0065]
【The invention's effect】
As described above, according to the present invention, since the operation speed information is output based on the timing at which the first operation detecting unit last changed from the first state to the second state, the influence of chattering is prevented. The operation speed can be detected while the operation is being performed.
[Brief description of the drawings]
FIG. 1 is a block diagram of an electronic keyboard instrument according to an embodiment of the present invention.
FIG. 2 is a memory map of the embodiment.
FIG. 3 is a waveform diagram of the embodiment.
FIG. 4 is a waveform diagram in another state of the embodiment.
FIG. 5 is a flowchart (1/2) of the main routine of the embodiment.
FIG. 6 is a flowchart (2/2) of the main routine of the embodiment.
FIG. 7 is a flowchart of a timer processing routine of the embodiment.
FIG. 8 is a diagram showing a contact structure in the prior art and the above embodiment.
[Explanation of symbols]
1 ... inner pattern, 2 ... outer pattern, 3 ... common pattern, 4 ... inner pair, 5 ... outer pair, 6 ... fixed contact, 10 ... first contact, 12 ... second contact, 25... 1st movable contact, 26... 2nd movable contact, 27... 2 make switch, 29... Pressing part, 52 .. keyboard, 54 .. key scan CPU, 56. , 60 ... bus, 62 ... internal bus, 64 ... system CPU, 66 ... ROM, 68 ... RAM, 70 ... operation display section, 72 ... sound source section, 74 ... bus, 562 ... CPU Program area, 564 ... Preset data area, 582 ... CPU work area, 584 ... TDC area, 586 ... MASKTM area, 588 ... RTRGTM area, 590 ... Status register area.

Claims (3)

Using the first and second operation detection means whose detection state changes according to the operation of the operation element, the operation speed of the operation element is based on the time interval at which the detection state of the first and second operation detection means changes. An operation speed information output method for outputting information,
A first detection step of detecting a change from the first state to the second state of the first operation detecting means to start time measurement;
A second detection step of detecting a change from the second state to the first state of the first operation detection means after the first detection step;
After detecting the change of the first operation detecting means from the first state to the second state after the second detection step, the time measurement started in the first detection step is cleared. A third detection process in which time measurement is started again;
A fourth detection process for detecting a change in state of the second operation detection means after the third detection process;
An operation speed information output method comprising: an output process of outputting the operation speed information based on a time measurement result in the fourth detection process. Using the first and second operation detection means whose detection state changes according to the operation of the operation element, the operation speed of the operation element is based on the time interval at which the detection state of the first and second operation detection means changes. An operation speed information output device for outputting information,
First detection means for detecting a change of the first operation detection means from the first state to the second state and starting time measurement;
Second detection means for detecting a change of the first operation detection means from the second state to the first state after the first detection means starts the time measurement;
After the second detection means detects a change from the second state to the first state, the first operation detection means detects a change from the first state to the second state. Then, the third detection means for clearing the time measurement started in the first detection means and starting the time measurement again,
A fourth detection means for detecting a change in state of the second operation detection means after the time measurement is started again by the third detection means;
Output means for outputting the operation speed information based on a time measurement result when the fourth detection means detects a state change of the second operation detection means;
An operation speed information output device comprising: Using the first and second operation detection means whose detection state changes according to the operation of the operation element, the operation speed of the operation element is based on the time interval at which the detection state of the first and second operation detection means changes. A recording medium recording a program for causing a computer to execute a process of outputting information, wherein the program is
A first detection step of detecting a change from the first state to the second state of the first operation detecting means to start time measurement;
A second detection step of detecting a change from the second state to the first state of the first operation detection means after the first detection step;
After detecting the change of the first operation detecting means from the first state to the second state after the second detection step, the time measurement started in the first detection step is cleared. A third detection process in which time measurement is started again;
A fourth detection process for detecting a change in state of the second operation detection means after the third detection process;
An output process for outputting the operation speed information based on a time measurement result in the fourth detection process;
The recording medium which memorize | stored the program which makes the said computer execute .

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