JPH03268124A - Key code command converting method - Google Patents

Abstract

PURPOSE:To obtain a universal unit by registering a command conversion table which shows the correspondence relation between key codes and commands in a system controller in advance. CONSTITUTION:When a specific key switch is turned on, the microcomputer 12a of an operation unit 12 adds an ON bit to a key code from a key code generation part 12b and outputs the resulting code to the system controller(SCNT) 11. When the key code originates from a mode selection key, the SCNT 11 switches the command conversion table 11a-1 to be used, receives key-OFF data and clears the key data, and waits for a next key code to arrive. The SCNT 11 switches the command conversion table 11a-1 every time the key code of the mode selection key is received. When the key code of the mode selection key is not received, the current mode key code-command conversion table 11a-1 is used to convert the received code into a command indicating specific operation and the command is transferred to a specific unit to perform the specific operation.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a key code/command conversion method, and particularly to a key code/command conversion method in a system in which data is exchanged between a system controller and each unit via a bus. Concerning the conversion method.

<Prior Art> There is a system in which a system controller and a plurality of units are connected to one bus, and data is exchanged between the system controller 1 and each unit 1 via the bus. In such a system, a system controller specifies a destination unit using an address and sends data, and the addressed unit takes in the sent data and performs a predetermined operation. Furthermore, in order to request and transmit data from a predetermined unit, the system controller specifies the unit by addressing and sends a data request command, and the addressed unit takes in the data request command and then sends the requested data. and transmits predetermined data to the system controller via the bus. Note that by including the sender address in the data from the unit, the unit that sent the data can be identified.

As a concrete example of such a system, a system controller 1-roller connects a tuner, CD player,
There are audio systems that centrally control audio equipment (units) such as cassette decks, DAT devices, graphic equalizers, amplifiers, etc., and the system controller assigns buses to predetermined units based on key operations on operating units 1 to (keyboard). Sends control commands via the unit 1- and executes control according to the operation key (switching audio source, play/skip, fast forward/rewind, program play, seek, volume adjustment, etc.) and sends display data to the display units 1-1 to perform predetermined display.

In such conventional systems, the operating unit (keyboard)
When a predetermined key is operated, a command code (command) corresponding to the operation instructed by the operation key or combination of operation keys is generated using a key/command conversion table and transmitted to the system controllers 1 to 1. , the system controller sends the command to a predetermined unit 1, causing the unit to execute the operation specified by the command.

<Problems to be Solved by the Invention> As described above, in the past, it was necessary to provide a command conversion table on the side of the operation unit 1 and generate commands corresponding to operation keys or combinations thereof on the operation unit side.

Therefore, if the system configuration changes and the key functions of the operating unit are changed, for example, if the keys are changed to instruct a different operation than before, or if the key combination is changed, the previous operation The unit was unusable and had to be replaced with a new one. That is, since the conventional operation unit is not designed for general use, there is a problem in that it cannot cope with addition of new key functions, change of key functions, etc.

From the above, it is an object of the present invention to provide a key code/command conversion method necessary for manufacturing a general-purpose operation unit 1 or keyboard that can accommodate addition of new key functions, change of key functions, etc. be.

<Means for Solving the Problems> In the present invention, the second problem is to provide an operation means for outputting the key code of the operation key to the bus, and an operation means provided in the system controller to output the key code output to the bus. a command conversion means for importing and converting it into a command;
This is achieved by outputting the command to the bus.

<Operation> A command conversion table indicating the correspondence between key codes and commands is registered in advance in the system controller 1-roller, and when a key is operated, the key code of the operated key is sent to the operating unit 1. The command is transferred to the system controller via the bus, and the system controller 1 controller determines a command corresponding to the sent key code from the command conversion table and transfers it to a predetermined unit via the bus.

<Embodiment> FIG. 1 is a block diagram of a car audio system to which a key code/command conversion method according to the present invention is applied.

One bus 1o is connected to a system controller 1 and a roller 1-1 and a number of units 12 to 18 with built-in microcomputers, and a system controller 11 and each unit 12 to 18 are connected to one bus 1o.
It is now possible to exchange data between them.

12 is to the operation unit 1 provided with various operation keys, including a key part 12a, a key code generator 12b that generates a key code according to the key that is turned on, and a key code generator 12b that reads the key code and connects to the bus 1o. It has a microcomputer 12c that performs output and predetermined control. 13 is a display unit 1-1 that displays the mode (radio mode, tape mode, CD mode, etc.), current time, reception frequency, etc.; 15 is a tuner; 15 is a CD player; 16 is a cassette deck; 17
is a graphic equalizer, and 18 is an amplifier.

System controller 11 and each knee 1~12~''-
A separate power line is connected to 8, and the power is turned on by pressing the power-on key on the operation unit 12. Each of the units 12 to 18 has an address setting switch (not shown), so that a predetermined address can be set in advance. For example, if the maximum number of units in the system is 16 or less, the address that can be set is 0000.0001,0010. . . 1111 are possible, and a predetermined address is set for each unit so as not to overlap, and the source and destination are specified using this address.

19 is a speaker, and 20, 21, and 22 are audio signal lines for inputting audio signals output from a tuner, a CD player, and a cassette deck to the graphic equalizer 17, respectively.

A command conversion table lla indicating the correspondence between key codes and commands is registered in advance in the system controller 11. In addition, the operation unit h12 can be connected to multiple units (
Tuner 14, CD player 15, cassette deck 16
), command conversion tables 1la-1 and 1la2 are provided that indicate the correspondence between key codes and commands corresponding to radio mode, CD mode, and tape mode.
．． 1la-3 is registered in the system controller 11-.

For example, as shown in FIG. 2, the key part 12a of the operation unit l-12 includes: (1) a power on/off key pw;

(2) Key EJ to Eject 1 to eject the storage medium (cassette tape, CD), (3) Tuner the audio source → C every time it is pressed.
D player → cassette deck → DAT device → tuner →
(4) Up key VLU and down key VLD for volume adjustment, (5) FM/A, M switching key FAK, (6) In radio mode Dual-purpose key CK1 used for tuning frequency seeking, fast forwarding/rewinding in tape mode, and playing track forward/backward in CD mode. , GK2, (7) Program key PG in CD mode (8) Functions as a tuning frequency preset in radio mode, dbxNR on/off, Dolby C on/off in tape mode (Dolby is a registered trademark)
, Dolby C on/off, music sensor (song selection)
, numeric keys NKI to NK6, which function as repeat play instructions, blank skip instructions, and play order specification in CD mode, (9) time (hours, minutes) adjustment key C
LH and CLM are provided.

When a predetermined key is turned on or off, the microcomputer 12c of the operation unit 12 outputs key-on data (consisting of 1-bit on data and n-bit key code) or key-off data (consisting of 1-bit off data and n-bit key code) at the timing shown in FIG. (consisting of key codes from npi1 to n) is output to the bus. Note that this key data is output together with its address as the sender and the address of the system controller as the destination.

The key code/command conversion control will be explained below according to the flowchart of FIG.

When a predetermined key switch is turned on by key operation, the microcomputer 12a of the operation unit 12 activates the key code generator 12.
On-pit is added to the key code output from b and output to the bus 10 to the system controller 11.

When the system controller] 2 receives the key-on code, it determines whether the code is the key code of the mode selection key (step 101), and if it is the key code of the mode selection key, it switches the command conversion table used for command conversion. (step 102), receive key-off data and clear key data step 103;
104-), waits for reception of the next key code.

Furthermore, every time the system controller 1 receives a key code for a selected key, it converts the command conversion table for the tuner → for the CD → for the tape deck → for the tuner →...
Switch to

On the other hand, if the received code is not the key code of the mode selection key, it is converted into a command instructing a predetermined operation using the key code/command conversion table of the current mode (step 1.05), and the command is sent via the bus 10. Then, the key code is transferred to a predetermined unit I-, and the unit executes a predetermined operation (step]-06). Thereafter, the process from step 103 onward is performed, and the process waits for the reception of the next key code.

In the following, a case will be described in which a predetermined operation is commanded by operating a single key, but the present invention can also be applied to a case in which a predetermined action is commanded by pressing a plurality of keys at the same time.

<Effects of the Invention> According to the present invention, it is only necessary to transfer the key code of the operation key from the operation unit to the system controller via the bus. The operation to be performed can be arbitrarily determined by software on the side using the operation unit (system controller 1 - roller side).

That is, according to the present invention, it is possible to provide a general-purpose operation unit that can handle addition of new key functions, change of key functions, etc.

[Brief explanation of drawings]

Fig. 1 is a block diagram of an audio system to which the present invention is applied, Fig. 2 is an example of the key arrangement of the operation unit, Fig. 3 is an explanatory diagram of key code transfer timing, and Figs. 1 to 4 are key code commands of the present invention. It is a flow chart of conversion processing. ]O... bus, 11... system controller 1-roller 11, a... key code/command conversion table 12
・・Operation units 1 to 12a・・Ki part 12b・・Key code generator

Claims (2)

[Claims] (1) In a key code/command conversion method in a system in which a system controller and a plurality of units including an operation unit are connected to one bus, and data is exchanged between the system controller and each unit via the bus, the system A command conversion table indicating the correspondence between key codes and commands is registered in the controller in advance, and the key code of the key operated by the operation unit is transferred to the system controller, and the system controller responds to the key code sent. A key code/command conversion method characterized in that a command is obtained from a command conversion table and transferred to a predetermined unit via a bus. (2) If the operating unit is used to control each of multiple controlled units, the operating unit should be provided with a key to select the unit to be controlled, and the system controller should be provided with a command for each controlled unit in advance. A conversion table is registered, and each time the system controller receives the key code of the selection key, it switches the command conversion table to be used in a predetermined order, and thereafter uses the switched command conversion table to send commands. 2. The key code/command conversion method according to claim 1, wherein the key code is converted into a command and transferred to a predetermined unit via a bus.