JP6540148B2 - Keyboard input imitation method and keyboard - Google Patents

Description

  The present invention relates to a keyboard input imitation method and a keyboard.

  A keyboard is widely used as an input device of a computer. In particular, in companies and the like, a keyboard is used as a main input device. In a computer system such as a bank, it is common to use a general personal computer (hereinafter abbreviated as a personal computer) as a terminal, and a keyboard is used as an input device of the personal computer.

  In a computer system such as a bank, in order to guarantee its operation, there is a situation where the keyboard operation of the personal computer which is the terminal is repeated and a series of key input is repeatedly executed. If necessary, it can happen. In this situation, there may be cases where automation software can not be installed on the product, or software can not be added like an embedded system, in order to prevent the functional functions of the product forming the computer system from being affected. In such a case, in order to perform input for motion compensation, it is actually necessary to manually repeat input from the keyboard, which requires a great deal of work.

  Therefore, it is conceivable to simulate and automate input. When simulating an input, it is conceivable to generate a data signal corresponding to the input in a personal computer, but in order to guarantee the operation, it is desirable to simulate a state as close as possible to the actual input.

JP 2004-70889 A Japanese Patent Laid-Open No. 7-261901 Unexamined-Japanese-Patent No. 6-149441

  According to the embodiment, a keyboard input simulation method and a keyboard are realized, which automatically performs desired input by simulating input from the keyboard.

According to the keyboard input imitation method of the first aspect of the present invention, in the case of the pseudo input mode in which the input key is simulated to be input, the key switch portion of the keyboard is set in a state where the predetermined key is depressed. Next, the scan value of the key matrix scan output by the keyboard controller is compared with the scan value of the simulated key. When the scanning values of the key matrix scanning and the scan values of the pseudo-key match, converts the scanning values of the key matrix scan to the scan values of a predetermined key. When the scanning values of the key matrix scanning and the scan values of the pseudo-key does not match, it converts the scanning values of the key matrix scan, so that in addition to the scan values of a predetermined key. Key switch portion, when subjected to scanning value of a predetermined key, and outputs a coincidence signal to the keyboard controller, when receiving the scan values other than the scan values of Jo Tokoro key, and outputs a mismatch signal to the key board controller .

A keyboard according to a second aspect of the present invention includes a keyboard controller, a conversion circuit, and a key switch unit. The keyboard controller outputs scan values of the key matrix scan. In the case of the pseudo input mode in which the conversion circuit simulates the input key and performs the input, the key switch unit sets the predetermined key pressed down, and the scan value of the key matrix scan and the scan value of the simulated key ,. Conversion circuit, when the scanning values of the key matrix scanning and the scan values of the pseudo-key match, converts the scanning values of the key matrix scan to the scan values of a predetermined key. Conversion circuit, when the scanning values of the key matrix scanning and the scan values of the pseudo-key does not match, the scan values of the key matrix scan, that converts to become non-scanning value of a predetermined key. Key switch unit, when subjected to scanning value of a predetermined key, and outputs a coincidence signal to the keyboard controller, when receiving the scan values other than the scan values of the predetermined key, and outputs a mismatch signal to the keyboard controller.

  According to an embodiment, automation of a desired input simulating an input from a keyboard is realized.

FIG. 1 is a diagram showing a schematic configuration of a computer apparatus having a personal computer (PC) and a keyboard connected to the PC as an input device. FIG. 2 is a diagram for explaining a key matrix. FIG. 3 is a diagram showing the configuration of the keyboard. FIG. 4 is a view showing another configuration of the keyboard. FIG. 5 is a view showing a system example of key contacts of a keyboard, in which (A) shows a mechanical contact system and (B) shows a capacitance system. FIG. 6 is a diagram showing a configuration in the case of simulating key input using the keyboard of FIG. FIG. 7 is a diagram showing a configuration in the case of simulating key input using the keyboard of FIG. FIG. 8 is a diagram showing a configuration in the case of simulating the keyboard and key input of the first embodiment. FIG. 9 is a diagram showing a change example of a scan value (key scan value) of a key matrix scan signal, a converted key scan value, and a match signal when a simulated key input changes in a key code stream, and the change It is a time chart which shows. FIG. 10 shows an example of changes in key scan value, converted key scan value, and match signal when the simulated key input changes with a key code stream that lasts several hundreds of ms, similar to human key input. FIG. FIG. 11 is a flow chart showing a procedure for creating a key code stream program installed in the control device. FIG. 12 is a diagram showing a configuration in the case of simulating the keyboard and key input of the second embodiment. FIG. 13 shows a change example of the scan value (key scan value) of the key matrix scan signal, the conversion key scan value, and the coincidence signal when the simulated key input changes in the key code stream in the second embodiment. FIG. FIG. 14 is a diagram showing the configuration of the keyboard of the third embodiment. FIG. 15 is a flowchart showing an operation in a storage mode for generating and storing a key code stream. FIG. 16 is a flowchart showing an operation of the CPU in a mode for executing simulated key input in accordance with the stored key code stream.

Before describing the receiving circuit of the embodiment, the keyboard will be described.
FIG. 1 is a diagram showing a schematic configuration of a computer apparatus having a personal computer (PC) and a keyboard connected to the PC as an input device.

  When the computer apparatus of FIG. 1 is used as a terminal, a personal computer is connected to a host computer via a communication line such as a LAN.

  The computer device has a personal computer 10 and a keyboard 20. The personal computer 10 has a CPU 11 and a keyboard interface (IF) unit 12. Actually, the personal computer 10 further includes a RAM, a ROM, a disk device, etc., but illustration thereof is omitted here.

  The keyboard 20 has a keyboard controller 21 and a key switch unit 22. The keyboard controller 21 is formed by a general-purpose processor, a ROM, a RAM, or the like, or a microcomputer including the same. The key switch unit 22 includes a two-dimensional matrix formed of a plurality of row lines and a plurality of column lines, and a plurality of keys provided corresponding to intersections of the plurality of row lines and the plurality of column lines. Have. Here, a portion formed by the two-dimensional matrix and the plurality of keys is referred to as a key matrix. In response to a request from the keyboard controller 21, the key switch unit 22 outputs information on the pressed key to the keyboard controller 21. The keyboard controller 21 converts information of the pressed key into a key code, and sends the key code to the CPU 11 via the keyboard IF unit 12 of the personal computer 10. Thereby, the CPU 11 acquires data of the input key code.

  The interface between the keyboard IF unit 12 and the keyboard controller 21 is known as a method based on RS232-C, USB, UDP, etc., PS / 2 method, etc. The keyboard described in the embodiment may be any method. Good.

FIG. 2 is a diagram for explaining a key matrix.
The key matrix has a two-dimensional matrix formed by a plurality of row lines (here, 5 rows) S0-S4 and a plurality of column lines (here, 5 columns) K0-K4, and keys are provided at a plurality of intersections. Be placed. Thus, here there are 25 keys. The position of the row line is represented by the X coordinate (an integer of 0 to 4), and the position of the column line is represented by the Y coordinate (an integer of 0 to 4). The key can be identified by the XY address.

  In FIG. 2, when the key of the intersection point C is pressed and the row line S2 and the column line K2 are connected, voltage pulses are applied to the row lines S0 to S4 in order, and a voltage pulse is applied to the row line S2 of the intersection point C Voltage pulses appear on the column line K2 at the intersection point C. In general, sequentially applying voltage pulses to the row lines S0 to S4 is referred to as a scan. Even if a voltage pulse is applied to the other row lines S0, S1, S3 and S4, no voltage pulse appears on the column lines K0 to K4, and even if a voltage pulse is applied to the row line S2, the column line K0, No voltage pulse appears at K1, K3 and K4. Therefore, when it is determined which of the row lines S0-S4 is applied when a voltage pulse appears in any of the column lines K0-K4, it is known which of the 25 keys is depressed. It should be noted that no voltage pulse will appear on the column lines K0-K4 if none of the keys are depressed.

  In a practical keyboard, detection of simultaneous pressing of a plurality of keys is also performed. If multiple keys are pressed at the same time, one scan will detect that the multiple keys are pressed. Although scanning may always be performed, in order to reduce power consumption, a circuit for detecting which key is pressed is provided, and scanning is started in response to a detection signal. In addition, the time required for one scan of the keyboard is faster than the input operation actually performed by human beings, and many scans are performed per second. Therefore, when it is detected that the same key is pressed in a plurality of consecutive scans, in order to prevent an erroneous determination that the key input is performed even when the key is accidentally touched by the keyboard operation, the key input Processing etc. which are determined are performed. These techniques are generally performed, and it is possible to adopt these techniques also in the embodiment, but the description will be omitted.

Next, the configuration of the key switch unit and the key matrix scan signal from the keyboard controller will be described.
FIG. 3 is a diagram showing the configuration of the keyboard.

  As described in FIG. 1, the keyboard 20 includes the keyboard controller 21 and the key switch unit 22. As shown in FIG. 3, the keyboard controller 21 has a key code encoder 23 and an X key scan signal generation unit 24. As mentioned above, although the keyboard controller 21 has ROM / RAM etc., illustration is abbreviate | omitted here.

  The key switch unit 22 includes an X decoder + X driver 25, a key matrix 26, a pressed position detection circuit 27, and an encoder 28. As described above, the key matrix 26 corresponds to a two-dimensional matrix consisting of a plurality of row lines (X coordinates) and a plurality of column lines (Y coordinates), and an intersection of a plurality of row lines and a plurality of column lines. And a plurality of arranged keys.

  The X key scan signal generation unit 24 sequentially generates scan values of the key matrix scan signal indicating the row number (X coordinate) of the key matrix 26 to which the voltage signal for scan is applied, and the key code encoder 23 and the key switch unit 22 Output to The X decoder + X driver 25 decodes the scan value of the key matrix scan signal and applies a voltage signal for scan to the row line of the row number designated by the scan value. Therefore, scanning voltage signals are sequentially applied to the plurality of row lines. The pressed position detection circuit 27 detects a voltage change of a plurality of column lines of the key matrix 26 by comparing it with a threshold. In other words, the pressed position detection circuit 27 applies a voltage signal for scanning to the row line of the depressed key, and causes a voltage change appearing in the depressed key row of the plurality of column lines of the key matrix 26. To detect. The encoder 28 encodes the signal output from the pressed position detection circuit 27 and generates a data signal indicating the depressed column line of the plural column lines, that is, the Y coordinate, to the key code encoder 23 of the keyboard controller 21. Output. The key code encoder 23 generates a key code of the key depressed in the key matrix 26 from the scan value of the key matrix scan signal indicating the X coordinate when the data signal indicating the Y coordinate is received and the data indicating the Y coordinate. , Output to a PC.

FIG. 4 is a view showing another configuration of the keyboard.
The keyboard of FIG. 4 is different from the keyboard of FIG. 3 in that the keyboard controller outputs the scan value of the key matrix scan signal indicating Y coordinate to the key switch portion together with the scan value of the key matrix scan signal indicating X coordinate. . The key switch outputs a coincidence signal when the scan values of the X and Y coordinates of the key matrix scan signal coincide with the X and Y coordinates of the depressed key, and outputs a noncoincidence signal otherwise.

  Specifically, the keyboard controller 31 includes a key code encoder 33, an X key scan signal generation unit 34, and a Y key scan signal generation unit 35. The key switch unit 32 includes an X decoder + X driver 36, a key matrix 37, a pressed position detection circuit 38, an encoder 39, and a coincidence detection circuit 40. The X key scan signal generation unit 34, the X decoder + X driver 36, the key matrix 37, the pressed position detection circuit 38 and the encode 39 are the same as the corresponding parts in FIG. The Y key scan signal generation unit 35 generates a scan value of the key matrix scan signal indicating the Y coordinate in synchronization with the generation of the scan value of the key matrix scan signal indicating the X coordinate in the X key scan signal generation unit 34. Specifically, the Y key scan signal generation unit 35 generates the scan value of the key matrix scan signal indicating the X coordinate once by the X key scan signal generation unit 34, the number of times corresponding to the number of columns of the column line Only generate scan values for the Y coordinate.

  The coincidence detection circuit 40 detects whether the output of the encoder 39 coincides with the scan value of the key matrix scan signal indicating the Y coordinate, and outputs a coincidence signal when they coincide, and outputs a noncoincidence signal when they do not coincide. Therefore, when one key is depressed, the coincidence signal is output only in one period in which the scan value of the key matrix scan signal indicating the Y coordinate is output in one scan.

  The key code encoder 33 uses the key code of the key depressed by the key matrix 26 from the scan value of the key matrix scan signal indicating the X coordinate when receiving the coincidence signal and the scan value of the key matrix scan signal indicating the Y coordinate. Generate

  The keyboard shown in FIG. 4 is often used for a capacitive keyboard to be described later, and is widely used for bank terminals and the like.

  FIG. 5 is a view showing a system example of key contacts of a keyboard, in which (A) shows a mechanical contact system and (B) shows a capacitance system.

  In the mechanical contact system of FIG. 5A, switches SW00-SW11 for connecting row lines and column lines are provided at the intersections of row lines S0, S1 and column lines K0, K1 to operate corresponding keys. Switch turns on / off. Specifically, depressing the key brings the switch into a connected state, and the voltage signal of the row line appears on the column line.

  In the electrostatic capacity system of FIG. 5B, capacitors C00 to C11 connected to the row lines and the column lines are provided at the intersections of the row lines S0 and S1 and the column lines K0 and K1, and the corresponding keys are operated Changes the capacitance value of the capacitance. In response to this, the voltage signal of the column line changes when the voltage signal is applied to the row line. Since the change of the capacitance value changes according to the configuration of the keyboard, the setting of the threshold or the like in the pressed position detection circuit 38 is uniquely performed by the keyboard maker and is not disclosed.

Next, a method of simulating key input and automatically performing desired input will be described.
FIG. 6 is a diagram showing a configuration in the case of simulating key input using the keyboard of FIG.

  As shown in FIG. 6, a control device 101 such as a personal computer, a key code address conversion circuit 102 and a pseudo signal generation circuit 103 are provided outside the keyboard 20. The pseudo signal generation circuit 103 has a coincidence detection circuit 104 and a gate 105. An external terminal 41 is provided in the housing of the keyboard 20. A signal line is drawn out from the signal line of the key matrix scan signal indicating the X coordinate from the keyboard controller 21 to the key switch unit 22 and the signal line of the signal indicating the Y coordinate from the key switch unit 22 to the keyboard controller 21. The signal line is pulled out to the outside through the external terminal 41. The signal line of the key matrix scan signal indicating the extracted X coordinate is connected to the coincidence detection circuit 104, and the signal line of the signal indicating the Y coordinate is connected to the gate 105.

  The control device 101 outputs a sequence (key code stream) of key input to be simulated and desired to be input to the key code address conversion circuit 102 by a program created and loaded in advance. At this time, in order to simulate key input in the form close to human key operation, the output key code continues for several hundred ms, and when the key code changes, provide an open state corresponding to a state where no key is pressed. Is desirable.

  The key code address conversion circuit 102 converts each key code of the key code stream into an address corresponding to the key matrix of the keyboard 20, that is, row number (X) and column number (Y), and pseudo X coordinate X 'and pseudo. Y coordinate Y 'is output. For the open state, assign a scan value that the key matrix scan signal indicating the X coordinate does not take.

  The coincidence detection circuit 104 detects whether the scan value of the key matrix scan signal indicating the X coordinate that changes as needed and the pseudo X coordinate X ′ coincide, and outputs an X coordinate coincidence signal to the gate 105 when they coincide. The signal to gate 105 is inactive when it does not match, indicating a mismatch. Since the scan value of the key matrix scan signal never matches the scan value indicating the open state, the signal to the gate 105 becomes inactive when the open state.

  When receiving the X coordinate coincidence signal, the gate 105 outputs a signal indicating the pseudo Y coordinate Y ′ supplied from the key code address conversion circuit 102 from the key switch unit 22 to a signal line to the keyboard controller 21.

  When the above input simulation operation is performed, the keys of the key switch unit 22 are not operated, and none of the keys is kept pressed. Therefore, in this state, the key switch unit 22 does not output a data signal indicating the Y coordinate.

  Output of the key code stream is started from the control device 101, and in response, the pseudo X coordinate X 'is input to the coincidence detection circuit 104. The keyboard controller 21 repeatedly performs a scan operation of sequentially changing the scan value of the key matrix scan signal. Here, when the scan value matches the pseudo X coordinate X ', the gate 105 outputs a signal indicating the pseudo Y coordinate Y' from the key switch unit 22 to the signal line to the keyboard controller 21. As described above, since the data signal indicating the Y coordinate is not output from the key switch unit 22, the signal indicating the pseudo Y coordinate Y ′ is input to the keyboard controller 21 as it is.

  As described above, when the keyboard controller 21 receives the data signal indicating the Y coordinate, the key corresponding to the pressed key is selected from the scan value of the key matrix scan signal indicating the X coordinate and the data signal indicating the Y coordinate. Generate code

  As described above, when the key code stream changes according to the key input to be simulated, the keyboard controller 21 determines that the input according to the key input to be simulated is performed and generates a key code. At this time, the key operation of the keyboard 20 is not performed, and the key input corresponding to the key code stream is automatically performed.

The method of simulating key input and automatically performing desired input can also be performed using the keyboard of FIG.
FIG. 7 is a diagram showing a configuration in the case of simulating key input using the keyboard of FIG.

  As shown in FIG. 7, a signal line is drawn out from the signal line of the key matrix scan signal indicating the X coordinate and the Y coordinate from the keyboard controller 21 to the key switch portion 22 and the signal line of the coincidence signal, It is connected to the coincidence detection circuit 107 of FIG. The coincidence detection circuit 107 detects whether the scan value of the key matrix scan signal indicating the X coordinate and the Y coordinate agrees with the pseudo X coordinate X ′ and the pseudo Y coordinate Y ′, and when they coincide, matches the keyboard controller 21. Output a match signal to the signal line.

  With the configuration shown in FIGS. 6 and 7, it is possible to simulate key input and automatically perform desired input. However, in the configurations shown in FIG. 6 and FIG. 7, the key switch unit 22 (decoder + driver, key matrix, pressed position detection circuit, encoder) is not involved at all in generation and detection of simulated key input. Therefore, there is a problem that it can not be said that the input through the keyboard is sufficiently simulated. In the embodiment described below, it is possible to simulate key input in a form closer to the operation state by simulating key input in a form related to signal processing in the key switch part of the keyboard.

FIG. 8 is a diagram showing a configuration in the case of simulating the keyboard and key input of the first embodiment.
The keyboard 20 according to the first embodiment includes a keyboard controller 31, a key switch unit 32, an external terminal 50, a match detection conversion circuit 51, an X selector 52, and a Y selector 53. In other words, the keyboard 20 of the first embodiment has a configuration in which the external terminal 50, the match detection conversion circuit 51, the X selector 52, and the Y selector 53 are added to the keyboard of FIG. The coincidence detection conversion circuit 51, the X selector 52, and the Y selector 53 together form a conversion circuit.

  The coincidence detection conversion circuit 51 operates when a pseudo input mode signal simulating a key input is active, and stops its operation at normal times. The coincidence detection conversion circuit 51 receives the scan value of the key matrix scan signal indicating the X coordinate and the Y coordinate output from the keyboard controller 31, and the pseudo X coordinate X 'and the pseudo Y coordinate Y' input from the outside. The coincidence detection conversion circuit 51 detects whether the scan values of the X coordinate and the Y coordinate of the key matrix scan signal coincide with the pseudo X coordinate X 'and the pseudo Y coordinate Y' from the outside. When the coincidence is detected, the coincidence detection conversion circuit 51 converts the scan values of the X and Y coordinates into scan values (addresses) of a predetermined key code. The predetermined key is, for example, the key code "0", and is converted to the address of the key "0". In the following, it is assumed that the predetermined key is the key code "0". When the simulated key input is a key code of a predetermined key, conversion is not substantially performed.

  The match detection conversion circuit 51 maintains the scan values of the X coordinate and the Y coordinate when they do not match, but in the case of the scan values of the X coordinate and the Y coordinate of the predetermined key, the scan values of the coordinates of keys other than the predetermined key Convert. When they do not match, the scan values of the X and Y coordinates may not be maintained, and may be converted into scan values of coordinates of any key other than the predetermined key. Here, when they do not match, it is referred to as converting to other than the predetermined key including the case of maintaining, and the scan values of the X coordinate and the Y coordinate output from the matching detection conversion circuit 51 are referred to as conversion X coordinate and conversion Y coordinate.

  The X selector 52 and the Y selector 53 normally select the scan value of the key matrix scan signal indicating the X coordinate and the Y coordinate output from the keyboard controller 31 and output the selected scan value to the key switch unit 32. Thus, the keyboard of the first embodiment normally performs the same operation as the keyboard of FIG.

  When simulating key input, the X selector 52 and the Y selector 53 select scan values of the transformed X coordinate and the transformed Y coordinate output from the coincidence detection transformation circuit 51 and output the selected scan value to the key switch unit 32. X selector 52 and Y selector 53 operate to simulate key input when the pseudo input mode signal input through external terminal 50 is active, and when the pseudo input mode signal is inactive, the normal operation is performed. Do the action.

  The coincidence detection conversion circuit 51, the X selector 52, and the Y selector 53 may be formed as an integrated circuit.

  When simulating key input using the keyboard 20 of the first embodiment, as shown in FIG. 8, a control device 101 such as a personal computer and a key code address conversion circuit 102 are provided outside the keyboard 20.

  The control device 101 outputs a sequence (key code stream) of key input to be simulated and desired to be input to the key code address conversion circuit 102 by a program created and loaded in advance. As described above, the key code to be output lasts for several hundreds of ms, and when the key code changes, an open state corresponding to a state in which no key is pressed is provided.

  The key code address conversion circuit 102 converts each key code of the key code stream into an address corresponding to the key matrix of the keyboard 20, that is, row number (X) and column number (Y), and pseudo X coordinate X 'and pseudo. Y coordinate Y 'is output. For the open state, assign a scan value that the key matrix scan signal indicating the X coordinate does not take. Furthermore, the key code address conversion circuit 102 outputs a pseudo input mode signal that is active.

  The pseudo X coordinate X ′ and the pseudo Y coordinate Y ′ output from the key code address conversion circuit 102 are sent to the coincidence detection circuit 51 via the external terminal 50. The pseudo input mode signal output from the key code address conversion circuit 102 is sent to the match detection circuit 51, the X selector 52, and the Y selector 53 via the external terminal 50.

  In the normal operation, since the control device 101 and the key code address conversion circuit 102 are removed, the pseudo input mode signal inputted to the coincidence detection conversion circuit 51, the X selector 52 and the Y selector 53 becomes inactive. Thereby, the coincidence detection conversion circuit 51 stops its operation, and the X selector 52 and the Y selector 53 select the scan value of the key matrix scan signal indicating the X coordinate and the Y coordinate output from the keyboard controller 31. Thus, the keyboard of the first embodiment normally performs the same operation as the keyboard of FIG.

  When the input key is simulated and input is performed, the control device 101 and the key code address conversion circuit 102 are connected to the external terminal 50. As a result, the pseudo input mode signal input to match detection conversion circuit 51, X selector 52 and Y selector 53 becomes active, match detection conversion circuit 51 becomes active, and X selector 52 and Y selector 53 have pseudo X coordinates. Select X 'and pseudo Y coordinate Y'.

  Next, a predetermined key (key code "0" in this case) in the key switch portion 32 of the keyboard 20 is pressed down. Then, the output of the key code stream is started from the control device 101, and the key code address conversion circuit 102 outputs the pseudo X coordinate X 'and the pseudo Y coordinate Y' corresponding to the key code stream.

  The keyboard controller 31 repeatedly performs a scan operation of sequentially changing scan values of the X coordinate and the Y coordinate of the key matrix scan signal. Here, when the scan value matches the pseudo X coordinate X 'and the pseudo Y coordinate Y', the coincidence detection conversion circuit 51 coordinates the scan value of the X coordinate and Y coordinate with the predetermined key (here, the key code "0"). Convert to a scan value of When the scan value does not match the pseudo X coordinate X 'and the pseudo Y coordinate Y', the coincidence detection conversion circuit 51 outputs the converted X coordinate and the converted Y coordinate of coordinates other than the predetermined key.

  When the key switch unit 32 receives the converted X coordinate and the converted Y coordinate converted into the scan value of the coordinate of the predetermined key, the key switch unit 32 decodes the converted X coordinate and applies a voltage signal to the row line of the predetermined key. Since the predetermined key is depressed, a voltage signal appears on the column line of the predetermined key, the depression detection circuit detects the voltage signal at the column line of the predetermined key, and the encoder outputs the Y coordinate of the column line of the predetermined key Do. Since this Y coordinate coincides with the transformed Y coordinate, the key switch unit 32 outputs a coincidence signal to the keyboard controller 31.

  The X and Y coordinates outputted by the keyboard controller 31 when the coincidence signal is received are values coincident with the pseudo X coordinate X 'and the pseudo Y coordinate Y'. Therefore, the keyboard controller 31 generates a corresponding key code, assuming that the keys of the pseudo X coordinate X 'and the pseudo Y coordinate Y' are pressed.

  When a desired key input (pseudo key input) to be input is changed according to the change of the key code stream, the pseudo X coordinate X 'and the pseudo Y coordinate Y' change accordingly, and the desired key code stream is input. Become.

  FIG. 9 is a diagram showing a change example of a scan value (key scan value) of a key matrix scan signal, a converted key scan value, and a match signal when a simulated key input changes in a key code stream, and the change It is a time chart which shows.

  In FIG. 9, it is assumed that there are five row lines, two column lines, the X coordinate is from 0 to 4, the Y coordinate is from 0 to 1, and the X and Y coordinates are (0, 0) , (0, 1), (1, 0),..., (4, 1), (0, 0). Therefore, the key matrix has 10 addresses, and (X, Y) changes 10 times during one scan. Here, 10 addresses correspond to “0” to “9”, in other words, 10 keys. The simulated key input changes to “2”, “5”, “8”, “2” is 3/10 period of 1 scan, “5” is 3/10 period of 1 scan, “8” Is maintained for a period of 4/10 of one scan.

  As shown in FIG. 9A, when the key scan value (X, Y) becomes (0, 0) at the first change of one scan, this coincides with the coordinates of the predetermined key “0”. Convert key scan value (X, Y) from (0, 0) to coordinates of other keys. Here, it is assumed that (0, 0) is converted to (3, 0). Note that any coordinate may be used as long as it is a coordinate other than the coordinate of the predetermined key. For example, the Y coordinate may be converted from 0 to 1, or both the X coordinate and the Y coordinate may be converted.

  If the key scan value (X, Y) becomes (0, 1) in the second change, the key scan value (X, Y) is maintained at (0, 1) as it is. Also in this case, any coordinate other than the coordinates of the predetermined key may be converted to any coordinate.

  In the third change, when the key scan value (X, Y) becomes (1, 0), this matches the simulated key scan value (coordinates) of “2”, so the key scan value (X, Y) Convert Y so that it becomes coordinates (0, 0) of a predetermined key. In response to this, the key switch unit 32 outputs a coincidence signal. Here, a match signal is indicated by a circle when it occurs, and a cross when it is a mismatch signal.

  In the fourth change, when the simulated key input changes to "5" and the key scan value (X, Y) becomes (1, 1), the key scan value (X, Y) is simply (1, 1). Maintain in 1). When the key scan value (X, Y) becomes (2, 0) in the next fifth change, the key scan value (X, Y) is maintained at (2, 0) as it is.

  When the key scan value (X, Y) becomes (2, 1) in the sixth change, this matches the simulated key scan value (coordinates) of “5”, so the key scan value (X, Y) Convert Y so that it becomes coordinates (0, 0) of a predetermined key. In response to this, the key switch unit 32 outputs a coincidence signal.

  At the seventh change, the simulated key input changes to "8". When the key scan value (X, Y) becomes (3, 0) (3, 1) in the seventh and eighth changes, the key scan value (X, Y) is maintained as it is.

  If the key scan value (X, Y) becomes (4, 0) in the ninth change, this matches the simulated key scan value (coordinates) of "8", so the key scan value (X, Y) Convert Y so that it becomes coordinates (0, 0) of a predetermined key. In response to this, the key switch unit 32 outputs a coincidence signal.

  If the key scan value (X, Y) becomes (4, 1) in the tenth change, the key scan value (X, Y) is maintained as it is.

  The time chart of (B) of FIG. 9 shows the change of each signal in the case of the above-mentioned example of change.

  FIG. 9 shows an example in which the simulated key input changes in a short time of changing three times in one scan. However, since it simulates human keyboard input, it is desirable to create a key code stream so that the simulated key input changes as much as human keyboard input.

  FIG. 10 shows an example of changes in key scan value, converted key scan value, and match signal when the simulated key input changes with a key code stream that lasts several hundreds of ms, similar to human key input. FIG. It is the same as FIG. 9 except that the simulated key input continues for a long time.

  In FIG. 10, since the key input "2" is input for several hundred ms, a coincidence signal is generated many times for the key input "2".

FIG. 11 is a flowchart showing a procedure of creating a key code stream program installed in the control device 101.
In step S11, an input key to be simulated is selected.
In step S12, the input time of the selected pseudo input key, that is, the time during which the key is depressed is selected.

In step S13, it is determined whether an open state is to be provided after the pseudo input key. If the open state is to be provided, the process proceeds to step S14.
In step S14, an open time is selected.

  In step S15, it is determined whether to continue simulating another input key, and in the case of continuing, the process returns to step S11, and in the case of ending the process, the process proceeds to step S16. A series of simulated key code streams are created by repeating S11 to S15.

In step S16, the number of repetitions of the above key code stream is input.
In step S17, it is determined whether to continue simulating another input key, and if so, the process returns to step S11, and if not, the process ends.
The control device 101 executes a program in accordance with a unit time of operation, and outputs a simulated input key string (key code stream) to the key code address conversion circuit 102.

  According to the first embodiment, a program storing a string of simulated input keys is created in advance, and with the control device 101 and the key code address conversion circuit 102 connected to the keyboard 20, the predetermined keys are Hold down. Then, if the control device 101 is executed, it is possible to automatically perform desired key input. Moreover, since this automatic key input is performed through signal processing in the key switch unit 22, there is an effect that the key input is simulated in a form closer to the actual input operation.

  The first embodiment is based on a keyboard having the configuration of FIG. 4, but it is also possible to base on a keyboard having the configuration of FIG. A second embodiment to be described next is based on a keyboard having the configuration of FIG.

FIG. 12 is a diagram showing a configuration in the case of simulating the keyboard and key input of the second embodiment.
In FIG. 12, the same control device 101 and key code address conversion circuit 102 as in the first embodiment are used.

  The keyboard 20 according to the second embodiment includes a keyboard controller 21, a key switch unit 22, an external terminal 60, an X match detection conversion circuit 61, an X selector 62, and a Y conversion selector 63. In other words, the keyboard 20 of the second embodiment has a configuration in which the external terminal 60, the X match detection conversion circuit 61, the X selector 62, and the Y conversion selector 63 are added to the keyboard of FIG.

  The X match detection conversion circuit 61 operates when a pseudo input mode signal simulating a key input is active, and stops the operation at normal times. The X match detection conversion circuit 61 receives the scan value of the key matrix scan signal indicating the X coordinate output from the keyboard controller 21 and the pseudo X coordinate X 'input from the outside. The X match detection conversion circuit 61 detects whether the scan value of the X coordinate of the key matrix scan signal matches the pseudo X coordinate X 'from the outside. When a match is found, the X match detection conversion circuit 61 converts the scan value of the X coordinate into a scan value of the key code of the predetermined key (row number of the row line). The predetermined key is, for example, the key code "0", and is converted into the line number of the line of the key "0". In the following, it is assumed that the predetermined key is the key code "0". The X match detection conversion circuit 61 maintains the scan value of the X coordinate when it does not match, but in the case of the scan value of the X coordinate of the predetermined key, converts it into the scan value of the line of the key other than the predetermined key. When they do not match, the scan value of the X coordinate may not be maintained, and may be converted into a scan value of a row of any key other than the predetermined key.

  The X selector 62 normally selects the scan value of the key matrix scan signal indicating the X coordinate output from the keyboard controller 21 and outputs the scan value to the key switch unit 22.

  When simulating a key input, the X selector 62 selects the scan value of the converted X coordinate output from the X match detection conversion circuit 61 and outputs it to the key switch unit 22. The X selector 62 operates to simulate key input when the pseudo input mode signal input through the external terminal 60 is active, and performs normal operation when the pseudo input mode signal is inactive.

  The Y conversion selector 63 normally selects a data signal indicating the Y coordinate output from the key switch unit 22 and outputs the selected data signal to the keyboard controller 21. Thus, in addition to the operation of the X selector 62, the keyboard of the second embodiment normally performs the same operation as the keyboard of FIG.

  When the Y conversion selector 63 receives data of the Y coordinate of the predetermined key from the key switch unit 22 when simulating a key input, the Y coordinate is a pseudo Y coordinate Y ′ supplied from the key code address conversion circuit 102. Convert to and output.

  When the pseudo Y coordinate Y 'converted from the Y conversion selector 63 is received, the X coordinate output from the keyboard controller 21 is a value coincident with the pseudo X coordinate X'. Therefore, the keyboard controller 21 generates a corresponding key code, assuming that the keys of the pseudo X coordinate X 'and the pseudo Y coordinate Y' are pressed.

  FIG. 13 shows a change example of the scan value (key scan value) of the key matrix scan signal, the conversion key scan value, and the coincidence signal when the simulated key input changes in the key code stream in the second embodiment. FIG.

  In FIG. 13, it is assumed that five row lines, two column lines, an X coordinate from 0 to 4, a Y coordinate from 0 to 1, and an X coordinate from 0 to 4 change repeatedly. If there is a depressed key, the key switch unit 22 outputs the Y coordinate at the time of the scan value of the X coordinate. Here, the ten keys "0", "1", "2", ... "9" correspond to the coordinates (0, 0), (1, 0), (2, 0), ... (4, 1). .

  When the key scan value (X) becomes (0) at the first change of one scan, this matches with the X coordinate of the predetermined key "0", so the key scan value (X) is the key other than (0) Convert to X coordinate. Any X coordinate may be used as long as it is a coordinate other than the X coordinate of the predetermined key. At this time, the key switch unit 22 does not output the Y coordinate.

  When the key scan value (X) becomes (1) in the second change, the key scan value (X) is maintained as it is (1). Also in this case, the coordinates may be converted to any coordinates other than the coordinates of the predetermined key, and the key switch unit 22 does not output the Y coordinate.

  In the third change, when the key scan value (X) becomes (2), this matches the simulated key scan value (X coordinate) of "2", so the key scan value (X) is a predetermined key Convert to X coordinate (0) of. In response to this, the key switch unit 22 outputs the Y coordinate (0) of the predetermined key, and the Y conversion selector 63 converts the Y coordinate (0) into a pseudo Y coordinate Y ′ (0) and outputs it to the keyboard controller 21. Output. The keyboard controller 21 then outputs an X coordinate that matches the pseudo X coordinate X ', and determines that the keys of the pseudo X coordinate X' and the pseudo Y coordinate Y '(2, 0) are pressed.

  When the simulated key input changes to "5" and the key scan value (X) becomes (3) during the fourth change, the key scan value (3) is maintained as it is. Furthermore, in the next fifth change, when the key scan value (X) becomes (4), the key scan value (4) is maintained as it is.

  In the sixth change, when the key scan value (X) returns to (0), this matches the simulated key scan value (X coordinate) of “5”, so the key scan value (X) is a predetermined key Convert to coordinate (0) of. In response to this, the key switch unit 22 outputs the Y coordinate (0) of the predetermined key, and the Y conversion selector 63 converts the Y coordinate (0) into a pseudo Y coordinate Y ′ (0) and outputs it to the keyboard controller 21. Output. The keyboard controller 21 then outputs an X coordinate that matches the pseudo X coordinate X ', and determines that the keys of the pseudo X coordinate X' and the pseudo Y coordinate Y '(0, 1) are pressed.

  At the seventh change, the simulated key input changes to "8". When the key scan value (X) becomes (1) or (2) in the seventh and eighth changes, the key scan value is maintained as it is.

  In the ninth change, when the key scan value (X) becomes (3), this matches the simulated key scan value (coordinates) of "8", so the key scan value (X) is a predetermined key Transform to coordinate (0). In response to this, the key switch unit 22 outputs the Y coordinate (0) of the predetermined key, and the Y conversion selector 63 converts the Y coordinate (0) into a pseudo Y coordinate Y ′ (1) and outputs it to the keyboard controller 21. Output. The keyboard controller 21 then outputs an X coordinate that matches the pseudo X coordinate X ', and determines that the keys of the pseudo X coordinate X' and the pseudo Y coordinate Y '(3, 1) are pressed.

The operation and processing using the control device 101 and the key code address conversion circuit 102 are the same as in the first embodiment.
As described above, in the second embodiment, the pseudo key input in which the keys of the pseudo X coordinate X ′ and the pseudo Y coordinate Y input from the outside are pressed can be performed through signal processing in the key switch unit 22. This produces an effect of simulating key input in a form closer to the actual input operation.

  In the first and second embodiments, key input is simulated in a state in which the control device and the key code address conversion circuit are connected to the keyboard via the external terminal. However, it is desirable that key input can be simulated without providing an external terminal on the keyboard and preparing the control device and the key code address conversion circuit. In a third embodiment to be described next, key input is simulated without connecting the control device and the key code address conversion circuit to the keyboard.

FIG. 14 is a diagram showing the configuration of the keyboard of the third embodiment.
The keyboard of the third embodiment has a keyboard controller 31, a key switch unit 32, a match detection conversion circuit 51, and a selector 54. The key switch unit 32 and the match detection conversion circuit 51 are the same as the corresponding parts of the keyboard of the first embodiment of FIG. 8, and the selector 54 is a combination of the X selector 52 and the Y selector 53.

  As described above, the keyboard controller is formed of a general-purpose processor, ROM, RAM, etc., or is formed of a microcomputer etc. including them, and has RAM, rewritable nonvolatile memory, etc. Therefore, in the third embodiment, the key code stream is stored in the memory of the keyboard controller. In addition, the key code stream is generated using the key switch unit of the keyboard.

  As shown in FIG. 14, a general keyboard controller has a keyboard controller CPU 71, a memory 72 such as a RAM / flash memory, an I / O port 73, a scan address port 74, and a bus 75. The CPU 71 accesses the memory 72, the I / O port 73 and the scan address port 74 via the bus 75. The operation program of the CPU 71 is stored in the flash memory, but is stored in the ROM (not shown) when the flash memory is not mounted.

  The scan address port 74 is part of the I / O port, but is separately shown here as a special port. The CPU 71 outputs the scan value (X, Y coordinates) of the key matrix scan signal generated internally to the scan address port 74. Further, the coincidence signal output from the key switch unit 32 is input to the interrupt signal terminal IRQ of the CPU 71. The CPU 71 reads pseudo key input information from the key code stream stored in the memory 72, generates a pseudo X coordinate X 'and a pseudo Y coordinate Y', and outputs the pseudo X coordinate X 'and the pseudo Y coordinate Y' to the I / O 73. The output of I / O 73 further includes a bit indicating a pseudo input mode. The configuration relating to the microcomputer and the like is widely known, and thus further description is omitted.

  In the third embodiment, a program for performing a storage mode for generating a key code stream according to a key input from the key switch unit and storing the key code stream in the memory 72 and an execution mode for outputting the stored key code stream To be mounted.

FIG. 15 is a flowchart showing an operation in a storage mode for generating and storing a key code stream.
In step S21, it is determined whether or not a key code stream storage mode has been instructed, and the process waits for an instruction. The storage mode is indicated by a combination of function keys and keys. The combination of function keys and keys indicating the storage mode is determined to be other than the combination of function keys and keys used in the normal operation. When the key code stream storage mode is instructed, the process proceeds to step S22.

  In step S22, a key code stream is generated according to the operation shown in FIG. The program may be provided with a function of measuring an actual key input operation to create a key code stream imitating the actual input operation. When all simulated key input is completed, the key input instructing the end is performed and the process is ended.

  FIG. 16 is a flowchart showing an operation of the CPU in a mode for executing simulated key input in accordance with the stored key code stream.

  In step S31, it is determined whether or not a key code stream execution mode has been instructed, and the process waits for an instruction. The execution mode is also indicated by a combination of a function key used in normal operation and a function key other than a combination of keys and a key. When the key code stream execution mode is instructed, the process proceeds to step S32.

  In step S32, a key code stream output state is set. Specifically, the bit indicating the pseudo input mode output from the I / O 73 is activated. As a result, the match detection conversion circuit 51 and the selector 54 are set to be in a state of performing pseudo input.

In step S33, the reading start position (address) of the memory storing the key code stream to be executed is set.
In step S34, the key code stream is read, and pseudo X coordinates and pseudo Y coordinates of key input are generated.

In step S35, the pseudo X coordinate and the pseudo Y coordinate are output to the I / O 73. Thereby, the pseudo key input described in the first embodiment is performed.
In step S36, the process waits until the time for performing simulated key input elapses. As a result, key input is performed in a manner close to the actual key input operation. After the time has elapsed, the process proceeds to step S37.

At step S37, the read position (address) is changed to the address of the next key code.
In step S38, it is determined whether there is no key code to be input. If there is, the process returns to step S34. By repeating steps S34 to S38, key input corresponding to the stored key code stream is performed. If there are no more key codes to be input, the process ends.

Further, the following appendices will be disclosed regarding the above embodiment.
[Supplementary Note 1]
Input scan value of key matrix scan to key switch section,
Receiving a response to the scan value of the key matrix scan from the key switch unit;
In a keyboard, which detects a depression state of a key in the key switch unit from a scan value of the key matrix scan and a response from the key switch unit.
The key switch unit is set to a state where a predetermined key is depressed,
Comparing the scan value of the key matrix scan with the scan value of the simulated key,
Converting the scan value of the key matrix scan into the scan value of the predetermined key when the scan value of the key matrix scan and the scan value of the simulated key match;
Converting the scan value of the key matrix scan to be other than the scan value of the predetermined key when the scan value of the key matrix scan does not match the scan value of the simulated key;
A keyboard input imitation control method characterized in that a depressed key in the key switch unit is determined from a scan value of the key matrix scan, a scan value of the simulated key and a response from the key switch unit.
[Supplementary Note 2]
The scan value of the key matrix scan scans all keys of the key switch unit,
The key switch unit outputs a coincidence signal when receiving the scan value converted into the scan value of the predetermined key,
The keyboard input imitation control method according to claim 1, wherein the key switch unit outputs a mismatch signal when receiving a scan value other than the scan value of the predetermined key.
[Supplementary Note 3]
In the key matrix of the key switch unit, positions of keys are defined by a plurality of rows and a plurality of columns.
The scan values of the key matrix scan scan the plurality of rows of the key matrix,
Compare the scan value of the key matrix scan with the line number of the simulated key,
When the scan value of the key matrix scan matches the row number of the simulated key, the scan value of the key matrix scan is converted to the row number of the predetermined key,
The scan value of the key matrix scan is maintained or converted to be other than the row number of the predetermined key when the scan value of the key matrix scan does not match the row number of the simulated key.
10. The keyboard input simulation method according to appendix 1, wherein when the key switch unit outputs the column number of the predetermined key, the key switch unit converts the column number of the key to be simulated.
[Supplementary Note 4]
The keyboard input imitation method according to any one of appendices 1 to 3, wherein the scan value of the simulated key is supplied from the outside of the keyboard.
[Supplementary Note 5]
The keyboard input imitation method according to any one of appendices 1 to 3, wherein the scan value of the simulated key is supplied from a storage unit in the keyboard.
[Supplementary Note 6]
A key switch unit having a key matrix in which a plurality of keys are arranged;
A keyboard controller that outputs scan values of a key matrix scan to the key switch unit;
At the time of the input simulation, the scan value of the key matrix scan and the scan value of the simulated key are compared, and when the scan value of the key matrix scan and the scan value of the simulated key coincide, the key matrix scan The scan value of the key matrix scan is converted to the scan value of the predetermined key, and when the scan value of the key matrix scan and the scan value of the pseudo key do not match, the scan value of the key matrix scan is other than the scan value of the predetermined key And converting circuits to convert
The key switch unit outputs a response to a scan value of the key matrix scan,
The keyboard controller receives the response to the scan value of the key matrix scan from the key switch unit, and the scan value of the key matrix scan, the scan value of the simulated key and the response from the key switch unit. A keyboard characterized in that a pressed state of a key in a key switch portion is determined.
[Supplementary Note 7]
7. The keyboard according to appendix 6, wherein the conversion circuit outputs the scan value of the key matrix scan without conversion at the time of non-input simulation.
[Supplementary Note 8]
The scan value of the key matrix scan scans all keys of the key switch unit,
The key switch unit outputs a coincidence signal when receiving the scan value of the predetermined key,
7. The keyboard according to appendix 6, wherein the key switch unit outputs a mismatch signal when receiving a scan value other than the scan value of the predetermined key.
[Supplementary Note 9]
In the key matrix of the key switch unit, positions of keys are defined by a plurality of rows and a plurality of columns.
The scan values of the key matrix scan scan the plurality of rows of the key matrix,
The conversion circuit compares the scan value of the key matrix scan with the row number of the simulated key, and when the scan value of the key matrix scan matches the row number of the simulated key, the key matrix The scan value of the key matrix scan is converted into the row of the predetermined key when the scan value of the scan is converted to the row number of the predetermined key and the scan value of the key matrix scan does not match the row number of the simulated key. The keyboard according to appendix 6, wherein conversion is performed so as to be other than the number, and when the key switch unit outputs the column number of the predetermined key, conversion is performed to the column number of the simulated key.
[Supplementary Note 10]
The keyboard according to any one of appendices 6 to 9, further comprising an external terminal for receiving a scan value of the predetermined key supplied from the outside.
[Supplementary Note 11]
The keyboard according to any one of appendices 6 to 9, further comprising: a storage unit storing information on the simulated key.
[Supplementary Note 12]
11. The keyboard according to appendix 11, wherein the information on the simulated key stored in the storage unit is stored by the keyboard controller based on a key input from the key switch unit.
[Supplementary Note 13]
Set the key switch section of the keyboard in the state where the predetermined key is depressed,
Compare the scan value of the key matrix scan output by the keyboard controller with the scan value of the simulated key,
Converting the scan value of the key matrix scan into the scan value of the predetermined key when the scan value of the key matrix scan and the scan value of the simulated key match;
Converting the scan value of the key matrix scan to be other than the scan value of the predetermined key when the scan value of the key matrix scan does not match the scan value of the simulated key;
The key switch unit outputs a coincidence signal to the keyboard controller when the scan value of the predetermined key is received.
The key switch unit outputs a mismatch signal to the keyboard controller when receiving a scan value other than the scan value of the predetermined key.
[Supplementary Note 14]
The keyboard input imitation method according to Additional remark 13 in which the scan value of the simulated key is supplied from the outside of the keyboard.
[Supplementary Note 15]
The keyboard input imitation method according to appendix 13, wherein the scan value of the simulated key is supplied from a storage unit in the keyboard.
[Supplementary Note 16]
Keyboard controller that outputs scan values of key matrix scan,
At the time of the input simulation, the scan value of the key matrix scan and the scan value of the simulated key are compared, and when the scan value of the key matrix scan and the scan value of the simulated key coincide, the key matrix scan The scan value of the key matrix scan is converted to the scan value of the predetermined key, and when the scan value of the key matrix scan and the scan value of the pseudo key do not match, the scan value of the key matrix scan is other than the scan value of the predetermined key A conversion circuit that converts to
And a key switch unit having a key matrix in which a plurality of keys are arranged and receiving scan values of the key matrix scan from the conversion circuit,
The key switch unit outputs a coincidence signal when it receives a scan value of the predetermined key, and outputs a noncoincidence signal when it receives a scan value other than the scan value of the predetermined key,
The keyboard controller, when receiving the coincidence signal from the key switch unit, determines that a key corresponding to a scan value of the key matrix scan is pressed.
[Supplementary Note 17]
17. The keyboard according to appendix 16, wherein the conversion circuit outputs the scan value of the key matrix scan without conversion at the time of non-input simulation.

  The embodiments have been described above, but all the examples and conditions described herein are for the purpose of assisting the understanding of the concept of the invention applied to the invention and the technology. The examples and conditions specifically described are not intended to limit the scope of the invention, and the construction of such examples in the specification does not show the advantages and disadvantages of the invention. While the embodiments of the invention have been described in detail, it should be understood that various changes, substitutions, and alterations can be made without departing from the spirit and scope of the invention.

10 personal computer (PC)
Reference Signs List 20 keyboard 21, 31 keyboard controller 22, 32 key switch unit 51 match detection conversion circuit 52 X selector 53 Y selector 61 X match detection conversion circuit 62 X selector 63 Y conversion selector 101 control device 102 key code address conversion circuit

Claims (11)

Input the scan value of the key matrix scan output by the keyboard controller to the key switch section,
Receiving a response to the scan value of the key matrix scan from the key switch unit;
In a keyboard, which detects a depression state of a key in the key switch unit from a scan value of the key matrix scan and a response from the key switch unit.
In the case of the pseudo input mode in which the input key is simulated and input is performed,
The key switch unit is set to a state where a predetermined key is depressed,
Comparing the scan value of the key matrix scan with the scan value of the simulated key,
When the scan values of the key to be the pseudo scan values of the key matrix scan match, it converts the scanned value before Symbol key matrix scan the scan values of the predetermined key,
When the scan values of the key to be the pseudo scan values of the key matrix scan do not match, the scan value before Symbol key matrix scan, converted to be a non-scanning value of the predetermined key,
The key switch unit outputs a coincidence signal to the keyboard controller when the scan value of the predetermined key is received.
The key switch unit outputs a mismatch signal to the keyboard controller when receiving a scan value other than the scan value of the predetermined key . The method according to claim 1, wherein the keyboard controller determines that a key corresponding to a scan value of the key matrix scan is pressed when the match signal is received from the key switch unit . The scan values of the key matrix scanning, keyboard input constructive method according to all the keys of the key switch section to claim 1 or 2 Ru scan Nsu. In the key matrix of the key switch unit, positions of keys are defined by a plurality of rows and a plurality of columns.
The scan values of the key matrix scan scan the plurality of rows of the key matrix,
Comparing the line number of the scan value of the key matrix scan with the line number of the scan value of the simulated key;
When the line number by the scan value of the key matrix scan matches the line number by the scan value of the pseudo key, the line number by the scan value of the key matrix scan is converted to the line number by the scan value of the predetermined key ,
When the line number by the scan value of the key matrix scan and the line number by the scan value of the pseudo key do not match, the line number by the scan value of the key matrix scan is not the line number by the scan value of the predetermined key Maintain or convert to be
The keyboard input imitation control method according to claim 1 or 2, wherein when the key switch unit outputs the column number of the predetermined key, the key switch unit converts it into a column number according to a scan value of the simulated key.   The keyboard input mimicking method according to any one of claims 1 to 4, wherein the simulated key scan value is supplied from the outside of the keyboard.   The keyboard input imitation method according to any one of claims 1 to 4, wherein the scan value of the simulated key is supplied from a storage unit in the keyboard. A key switch unit having a key matrix in which a plurality of keys are arranged;
A keyboard controller that outputs scan values of a key matrix scan to the key switch unit;
In the case of the pseudo input mode in which the input key is simulated and input is performed, the key switch unit is set to a state where the predetermined key is depressed, and the scan value of the key matrix scan and the scan value of the simulated key are comparison, when the scanning values of the key to be the pseudo scan values of the key matrix scan match, converts the scanned value before Symbol key matrix scan scanning value of a predetermined key, the scan values of the key matrix scan wherein when the scanning values of the pseudo-key does not coincide, the scanning values before Symbol key matrix scan, have a, a conversion circuit for converting to be other than the scan values of the predetermined key and,
The key switch unit outputs a coincidence signal to the keyboard controller when the scan value of the predetermined key is received.
The keyboard switch, wherein the key switch unit outputs a mismatch signal to the keyboard controller when it receives a scan value other than the scan value of the predetermined key . 8. The keyboard according to claim 7, wherein the keyboard controller determines that a key corresponding to a scan value of the key matrix scan is depressed when the coincidence signal is received from the key switch unit .   The keyboard according to claim 7 or 8, wherein the conversion circuit outputs the scan value of the key matrix scan without conversion at the time of non-input simulation. The scan values of the key matrix scanning keyboard according to all the keys of the key switch section to claim 7 or 8 Ru scan Nsu. In the key matrix of the key switch unit, positions of keys are defined by a plurality of rows and a plurality of columns.
The scan values of the key matrix scan scan the plurality of rows of the key matrix,
The conversion circuit compares a row number by the scan value of the key matrix scan with a row number by the scan value of the simulated key, and scans the row number by the scan value of the key matrix scan and the simulated key When the line number by the value matches, the line number by the scan value of the key matrix scan is converted to the line number by the scan value of the predetermined key, and the line number by the scan value of the key matrix scan and the simulated key When the line number according to the scan value does not match, the line number according to the scan value of the key matrix scan is maintained or converted to be other than the line number according to the scan value of the predetermined key, and the key switch unit Converting the column number according to the scan value of the simulated key when the column number of the column is output Or keyboard according to 8.

Images