JP2002055764A - Wireless keyboard and infrared transmission code for pc remote controller - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an infrared signal transmission protocol for a wireless keyboard and a PC remote controller capable of preventing any interference with the other audio/video electronic equipment. SOLUTION: Communication codes are grouped into four parts, that is, a key code for a keyboard 13, a button code for a remote controller 15, a mouse code for the keyboard, and a mouse code for the remote controller. The key code is used for identifying the BREAK and MAKE of the keyboard on a wireless keyboard, and the button code is used for identifying the BREAK and MAKE of a button on a PC remote controller. The mouse codes for the keyboard and the remote controller are separately defined, and they are used for identifying the operation of a pointing device on the wireless keyboard and the PC remote controller.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an infrared signal transmission protocol, and more particularly, to an infrared signal transmission protocol for wireless keyboards and PC remote controllers. The protocol is wireless
Identify the key or code present on the keyboard and PC remote controller, respectively, or the code transmitted in response to various situations of either the button or the pointing device.

[0002]

BACKGROUND OF THE INVENTION The need for wireless communication or control from a wireless keyboard and a personal computer (PC) remote controller, respectively, has led to the recent introduction of wireless keyboards or PC remote controllers to the market. As shown in FIG. 1, on a personal computer 11, a normal infrared signal receiver 110, a standard RS-23
An I / O controller 113 having two ports is provided. For example, a typical infrared signal receiver 110 has 3
It may be of a type that decodes infrared light of 940 nm having a carrier of 8 KHz. In a well-known manner, the output of receiver 110 is connected to the I / O via a standard RS-232 port.
Received by the / O controller 113. Input devices to the personal computer 11 may include a keyboard 13 and a PC remote controller 15. Either the keyboard 13 or the PC remote controller 15 is selectively connected to the personal computer 11 wirelessly. Typically, the keyboard 13 is
In addition, it has a pointing device 130, ie, a mouse, and a plurality of keys. Typically, the PC remote controller 15 has a plurality of buttons (functions), ie, a CD, and a pointing device 153 thereon.

[0003]

Under the configuration shown in FIG. 1, the present invention provides a method for avoiding interference between other audio / video electronics and a wireless keyboard and PC remote controller. Provide an infrared signal transmission protocol for wireless keyboards and PC remote controllers. The transmission protocol provided by the present invention is a wireless keyboard and P
Not only is it possible to distinguish the transmitted signal generated by the C remote controller from the transmitted signal generated by the controller for other well-known electronic devices, but also before transmitting to the receiver. Known RS
The encoding is also performed in the -232 format.

[0004]

According to the present invention, a keyboard communication protocol includes a MAKE code and a BREA.
Includes K code.

A MAKE code is generated when one key is depressed, and a BREAK code is generated when one key is released from a depressed state. The MAKE code includes first data and second data following the first data. The first data is exclusive OR (XO) for the parameter and the first ID code.
R) is formed by performing an operation.

[0006] In a preferred embodiment, the parameter is obtained by adding a key number assigned to the key to a first predetermined constant. Specifically, the communication code is a key code for a keyboard, a button code for a remote controller, a mouse code for a keyboard, and a mouse code for a remote controller. Grouped into two parts. The key codes for the keyboard are BREAK and MAKE of the keyboard on the wireless keyboard.
Used to identify The button code for the remote controller is used to identify the buttons BREAK and MAKE on the PC remote controller. Mouse codes for the keyboard and remote controller are defined separately. They are used to identify the operation of the pointing device on the wireless keyboard and PC remote controller. The communication code is encoded in RS232 format and transmitted by infrared waves at a baud rate of 1200. Each key packet for the keyboard is 2
Consists of two data units. Each mouse packet for keyboard and each button, and PC remote
The mouse packet for the controller consists of three data units. Each data unit has one start bit, seven data bits, one parity bit, and one stop bit, for a total of 10 bits.
Information bits.

[0007]

DETAILED DESCRIPTION OF THE INVENTION The present invention provides an infrared transmission protocol for an input device that communicates wirelessly with a personal computer. Input devices include a keyboard and a personal computer (PC) remote controller. The transmission code is grouped into four parts: a key code for the keyboard, a button code for the remote controller, a mouse code for the keyboard, and a mouse code for the remote controller. Has been

The key code for the keyboard is MA
KE, BREAK, END, REPEAT, EXTEN
Including six types, T and ERROR, each type has its corresponding function. For example, a MAKE code is generated and sent into a keyboard by a microcontroller when a key is pressed. The BREAK code is generated and sent when a key is released from a depressed state. The END code is sent for approximately 0.1 seconds after the key is released from the depressed state. REPEAT
The code is generated and sent when the last key pressed remains pressed for more than 0.25 seconds.
The EXTENT code is the primary code for the extended code on the keyboard. The ERROR code is sent when a ghost combination of a depressed key is detected.

[0009] In particular, the MAKE code corresponding to the key provided by the present invention includes first data and second data following the first data. The first data is exclusive OR (XO) for the parameter and the first ID code.
R) is formed by performing an operation.

[0010] In one embodiment, the parameter is obtained by adding a key number assigned to the key to a first predetermined constant. In one embodiment,
The first predetermined constant is 128 in decimal. In one embodiment, the first ID code is 53 in hexadecimal.

[0011] In one embodiment, the second data is
It is formed by performing an XOR operation on the parameter and the second ID code. In one embodiment, the second ID code is AB in hexadecimal.

Further, the MAKE code is a personal code.
It is encoded in RS232 format before being sent to the computer. Since this is done and the RS232 port is provided on the personal computer,
The personal computer can receive the code transmitted through a given RS232 port, eliminating the need for an extra microcontroller on the personal computer.

In particular, the BREAK code corresponding to the key provided by the present invention includes first data and second data following the first data. The first data includes X for the key number assigned to the key and the first ID code.
It is formed by performing an OR operation. The second data is formed by performing an XOR operation on the key number and the second ID code.

In particular, when the expanded key is depressed, an EXTE representing the primary code for the expanded key
An NT code is generated. The EXTENT code is the first
And the second data following the first data. The first data includes a second predetermined constant and a first ID.
Formed by performing an XOR operation on the code,
The second data is formed by performing an XOR operation on a second predetermined constant and a second ID code. In one embodiment, the second predetermined constant is 5E in hexadecimal.

In particular, the communication protocol of the present invention further provides an ER that supports ghost coupling of depressed keys.
Includes ROR code. The ERROR code includes first data and second data following the first data. First
Is formed by performing an XOR operation on a third predetermined constant and the first ID code, and the second data is formed by performing an XOR operation on the third predetermined constant and the second ID code. It is formed by performing an operation. In one embodiment, the third predetermined constant is 8E in hexadecimal.

[0016] Further, the END code includes first data and subsequent second data. The first data is 0EH
And an XOR operation on the first ID code. The second data is 0EH and the second I
It is generated by performing an XOR operation on the D code.

[0017] Further, the REPEAT code includes first data and subsequent second data. The first data is
It is generated by performing an XOR operation on 00H and the first ID code. The second data is generated by performing an XOR operation on 00H and the second ID code.

When the above embodiments are implemented, a summary of the preferred embodiments is disclosed by the following table.

[0019]

[Table 1] The following is an example showing the code generated when key "K" is pressed and released. As an example, hereafter
The key number assigned to “K” is 00100110. When "K" is pressed, the data 1 generated for the MAKE code is 11110101 (F5H), and the generated data 2 is 0000101101 (0D
H). When "K" is released, a BREAK code is generated. The data 1 of the BREAK code is 01
110101 (75H), and data 2 is 1000
1100 (8D). Then, about 0.1 second after the "K" is released, an END code is generated, and E
The ND code data 1 is 01011101 (5D), and the END code data 2 is 10100101
(A5).

The keyboard may further include a pointing device or mouse. When the pointing device is moved, a pointing packet is generated. Mouse code for wireless keyboard
A packet consists of three data units. That is, one identification (ID) code, a first code indicating an increment in the X direction following the identification code, and a second code indicating an increment in the Y direction following the first code. In one embodiment, the identification code selected is 3F in hexadecimal. The sequence of transmitting the mouse code to the wireless keyboard is shown as follows.

[0021]

[Table 2] X6 equal to 1 is inhibited and Y6 equal to 1 is inhibited.

As an illustration, the pointing device movement count (0,
When there is 1), the generated code is read as follows. 00111111, 00000000, and 0
The button code packet for the 0000001PC remote controller also consists of three data units. Three types of sequences for buttons are provided. They are MAKE, REPEAT, and B
REAK.

The MAKE sequence means that the button has been depressed. That is, a packet is generated when a button on the PC remote controller is depressed. The packet is a make code, the make code
It includes the button code assigned to the button following the code and the check code following the button code. In one embodiment, the check code is the reverse of the button code. The sixth bit preceding the make code is set to be zero. The sixth bit preceding the button code is set to be one. The sixth bit preceding the check code is set to be one.

In the REPEAT sequence, when the button is about 1
This means that the key has been pressed down for longer than 00 milliseconds (ms). The REPEAT sequence transmits repeatedly for a period of about 100 milliseconds. That is, a packet is generated when a button on the PC remote controller is depressed for more than about 100 milliseconds. The packet includes a repeat code, a button code assigned to the button following the repeat code, and a check code following the button code. In one embodiment, the check code is the reverse of the button code. The sixth bit preceding the repeat code is 0
Is set to be 6 preceding button code
The th bit is set to be one. The sixth bit preceding the check code is set to be one.

The BREAK sequence signifies the end of the REPEAT sequence and also the release of the button. B
The packet corresponding to the REAK sequence is
A code, a button code assigned to the button following the break code, and a check code following the button code. In one embodiment, the check
The code is the reverse of the button code. The sixth bit preceding the break code is set to be zero. The sixth bit preceding the button code is 1
Is set to be The sixth bit preceding the check code is set to be one.

A mouse packet for a PC remote controller consists of three data units. The first data unit has five identification bits and a "left"
And "right" button status. The next data unit contains five data bits for horizontal movement. The last data unit contains 5 data bits for vertical movement. The transmission sequence of the mouse code for the PC remote controller is shown as follows. When the X5 bit is set, the mouse is moving in the negative X direction. When the Y5 bit is set, the mouse is moving in the negative Y direction.

[0027]

[Table 3] # Means an odd parity check bit and *
Means two's complement.

From the above description, the combination of the sixth bit of the mouse code for the wireless keyboard is (0, X6, Y6), where X6 is a number other than 1 and Y6 is other than It is recognized that Also, the combination of the sixth bit of the button code for the PC remote controller is always (0,1,1)
Mouse for the PC remote controller
The combination of the sixth bit of the code is always (1, 0, 0). The differences between them allow the receiver on the personal computer to easily distinguish one from each other.

While the above preferred embodiments and applications of the present invention have been described for purposes of illustration, the objects and features of the invention are only limited as set forth in the appended claims. It is clear to a person skilled in the art.

[0030]

As described above, according to the present invention, other audio / video electronic devices, a wireless keyboard and a PC are provided.
To avoid interference with the remote controller,
An advantage is that an infrared signal transmission protocol is provided for a wireless keyboard and a PC remote controller.

[Brief description of the drawings]

FIG. 1 is a diagram showing a system to which the present invention can be applied.

[Explanation of symbols]

11 personal computer, 110 receiver, 1
13 ... I / O controller, 13 ... keyboard, 15 ...
PC remote controller, 130 ... pointing device, 151 ... multiple buttons, 153 ... pointing device.

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 5B020 AA15 AA17 DD02 KK03 KK07 KK13 5K014 AA01 BA00 EA01 HA01 HA05 5K034 AA05 CC06 EE01 EE03 FF16 GG06 HH63 5K048 AA06 BA53 DB04 EA14 FA05 HA04 HA06

Claims (19)

[Claims] 1. A communication protocol for an input device for wirelessly communicating with a personal computer, including a keyboard having at least one key, wherein the MA generated when the one key is depressed.
A KE code, and a BREAK code generated when the one key is released from a depressed state.
The code comprises first data and a second data following the first data.
Wherein the first data comprises a parameter and a first
Communication protocol formed by performing an XOR operation on the ID code of 2. The protocol according to claim 1, wherein the parameter is obtained by adding a key number assigned to the one key and a first predetermined constant. 3. The protocol of claim 2, wherein the first predetermined constant is 128 in decimal. 4. The protocol according to claim 1, wherein the first ID code is 53 in hexadecimal. 5. The second data includes a parameter and a second
3. The protocol according to claim 2, wherein the protocol is formed by performing an XOR operation on the ID code. 6. The protocol according to claim 5, wherein the second ID code is AB in hexadecimal. 7. The protocol of claim 1, wherein the MAKE code is encoded in an RS232 format before being transmitted to a personal computer. 8. The BREAK code includes first data and second data following the first data, wherein the first data performs an XOR operation on a key number and a first ID code. The protocol according to claim 5, wherein the second data is formed by performing an XOR operation on the key number and the second ID code. 9. The keyboard further includes at least one extended key, and the communication protocol further comprises:
An EXTENT code is generated that includes an EXTENT code corresponding to the expanded key and that represents a primary code for the expanded key when the expanded key is depressed, the EXTENT code being a first data. And second data following the first data, wherein the first data is formed by performing an XOR operation on a second predetermined constant and a first ID code, and the second data is 6. The protocol according to claim 5, wherein the protocol is formed by performing an XOR operation on the second predetermined constant and the second ID code. 10. The protocol of claim 9, wherein the second predetermined constant is 5E in hexadecimal. 11. The communication protocol further includes an ERROR code corresponding to a ghost combination of the depressed key, wherein the ERROR code comprises the first data and the first data.
The second data following the data of
XOR on the third predetermined constant and the first ID code
The second data is formed by performing an operation.
6. The protocol according to claim 5, wherein the protocol is formed by performing an XOR operation on the predetermined constant and the second ID code. 12. The third predetermined constant is 8E in hexadecimal notation.
The protocol according to claim 11, which is: 13. The keyboard further includes a pointing device thereon, wherein a pointing packet is generated when the pointing device is moved, the pointing packet comprising an identification code and an X direction following the identification code. A first code indicating an increment;
A second code indicating an increment in the Y direction following the second code. 14. The input device further includes a remote controller for the personal computer, the remote controller including at least one button on the first packet when the button is depressed. 14. The protocol of claim 13, wherein the first packet comprises a make code, a button code assigned to the button following the make code, and a check code following the button code. 15. The protocol of claim 14, wherein the check code is the reverse of the button code. 16. The communication protocol further includes an END code generated approximately 0.1 seconds after the key is released,
The END code includes first data and second data following the first data, wherein the first data performs an XOR operation on a fourth predetermined constant and a first ID code. The protocol according to claim 5, wherein the second data is formed by performing an XOR operation on a fourth predetermined constant and the second ID code. 17. The fourth predetermined constant is 0E in hexadecimal notation.
17. The protocol of claim 16, wherein 18. The communication protocol further includes a REPEAT code generated when the key remains depressed for more than 0.25 seconds, wherein the REPEAT code includes the first data and the first data. The first data is formed by performing an XOR operation on a fifth predetermined constant and the first ID code, and the second data includes a fifth predetermined constant. And the second
6. The protocol according to claim 5, wherein the protocol is formed by performing an XOR operation on the ID code. 19. The fifth predetermined constant is 00 in hexadecimal.
19. The protocol according to claim 18, wherein