JP2505052B2 - How to register the unit - Google Patents

Description

The present invention relates to a unit registration method, and in particular, a controller and a plurality of units are connected to one bus, and the controller and each unit are mutually connected via a bus. The present invention relates to a unit registration method in a system for exchanging data.

<Prior Art> There is a system in which a controller and a plurality of units are connected to one bus, and data is exchanged between the controller and each unit via the bus. In such a system, the controller designates a destination unit by address and sends data, and the addressed unit takes in the sent data and performs a predetermined operation.

Further, in order to request and transmit data to a predetermined unit, the controller specifies the unit by addressing and sends a data request command, and the addressed unit fetches the data request command and then requests it. Send predetermined data to the controller via the bus. By including the transmission source address in the data from the unit, the unit that transmitted the data can be identified.

As a concrete example of such a system, there is an audio system in which a system controller centrally controls audio equipment (units) such as a tuner, a CD player, a cassette deck, a DAT device, and a graphic equalizer.

By the way, taking such an audio system as an example,
The units that make up the system are not constant and change according to the user's request.One system consists of essential units such as a keyboard, display unit, system controller, tuner and cassette deck, and another system For example, it consists of an essential unit, a tuner, a CD player, and a graphic equalizer. Then, the system controller of each system sends a control command to a predetermined unit based on the key operation of the keyboard, and controls the unit to control (output device switching,
Play / stop, fast forward / rewind, seek, etc.), and display data is sent to the display unit to perform a predetermined display.

<Problems to be Solved by the Invention> By the way, in the audio system having the above configuration, the system controller must recognize what kind of unit (CD player, cassette deck, graphic equalizer, etc.) the system is composed of. I won't.

Therefore, when the unit type registration condition is satisfied due to power-on or the like, the system controller may execute a type registration routine to sequentially output the type data from the units constituting the system and register the type data in the built-in memory. .

However, with this method alone, if data cannot be exchanged between the system controller and the unit due to noise or other reasons, or if the unit is connected to the bus after the registration routine is executed by the system controller, the unit will be connected. It is judged that it is not done, and correct audio control cannot be performed.

In view of the above, an object of the present invention is to provide a unit registration method capable of automatically and reliably registering a unit constituting a system in a system controller.

<Means for Solving the Problem> In the present invention, the above-mentioned problem is to provide means for sequentially sending registration commands to the units constituting the system and when receiving a registration command addressed to itself within a predetermined time after the power is turned on. Is a means for transmitting the registration data (type, etc.) to the controller, a means for storing the registration data, and a registration request to the controller if the registration command is not received within a predetermined time after the power is turned on. This is achieved by means for transmitting a command and means for transmitting a registration command to the unit that has generated the registration request command.

<Operation> The controller sequentially sends the registration commands to the units constituting the system, and when each unit receives the registration command addressed to itself within a predetermined time after the power is turned on, the registration data (type, etc.) is sent to the controller. To the controller to register what unit it is and if it does not receive the registration command within a specified time after the power is turned on, it sends a registration request command to the controller A registration command is transmitted to the unit that generated the command, registration data is received from the unit, and the unit is registered.

<Embodiment> FIG. 1 is a block diagram of a system to which the unit registration method according to the present invention can be applied. One bus 10 has a plurality of units including a system controller 11 and a microcomputer.
.. are connected, and data can be exchanged between the system controller 11 and each unit.
The bus 10 may transfer data serially.

Address setting switch 12 for each unit 12, 13, 14
There are a, 13a, 14a, ..., and a predetermined address can be set in advance. For example, if the maximum number of units in the system is 8 or less, the settable address is 00
Eight of 0,001,010, ... 111 can be considered, and a predetermined address is set so that each unit does not overlap. The address setting method is not limited to this case, and another method may be considered.

In the case of an audio system, each unit in Fig. 1
12, 13, 14 ... are operation units (keyboards) with built-in microcomputer, display units, cassette decks, tuners, graphic equalizers, etc. (essential units may be combined into a unit), and each unit has a separate power line Is connected, and the power is turned on to each unit by pressing the power-on button on the operation unit.

Hereinafter, the unit registration method of the present invention will be described with reference to FIGS. The addresses that can be set in the unit are the above eight, the address of the system controller is fixed at 000, and the addresses of other units are set in advance by the address setting switches 12a, 13b, 14c .. And

System controller processing (Figs. 2 and 3) When the system power is turned on or the system reset button is pressed, the system controller 11 first (1) determines which unit has the address of the bus 10 Is performed (address search), and then (2) registration processing of the unit connected to the bus is performed.

That is, when the power is turned on or the reset button of the system is pressed, the system controller 11 sets the address to 001 and outputs the address search command to the bus 10 together with the address. Thus, if the unit having the address 001 is connected to the bus 10, the unit sends a "status signal indicating that the unit is connected" to the system controller 11 in response to the address search command. However, the status signal is not transmitted unless the unit having the address 001 is connected (step 101).

The system controller 11 determines whether or not the unit having the address 001 is connected based on the presence or absence of the status signal (step 102), and when the status signal is received (if the unit is connected), the address 001
Is stored in the built-in memory 11a (step 103). If the status signal is not received in step 102, it is determined that the unit having the address 001 is not connected.

Then, it is judged whether the above processing has been performed for all addresses (001 to 111) that can exist in the system (step 104). If the above processing has not been performed for all addresses, the current address is incremented to 010, An address search command is output to the bus 10 together with the address, and the processing from step 101 onward is repeated.

As described above, if the above process is performed for all the addresses 001 to 111, the addresses of the units connected to the bus 10 can be stored in the memory 11a, and the address search process is completed.

When the address search processing is completed, the system controller 11 outputs a registration command to the bus 10 together with the address stored in the memory 11a (step 105). As a result, the unit having the address output to the bus 10 reads the registration command and, within a predetermined time, transmits registration data indicating what kind of unit it is to the system controller 11 via the bus.

The system controller 11 checks whether the registration data from the unit has been received (step 106), and if not, checks whether a predetermined time has passed (step 10).
7) If not, wait for receipt of registration data.

If the registration data is received within the predetermined time, the registration data is stored in the memory 11a in association with the address (step 108).

If the process of step 108 is completed or if the registration data is not received even after the lapse of a predetermined time, it is judged whether or not the processes of step 105 and subsequent steps have been performed for all the addresses stored in the memory 11a (step 109), and the process is executed. If there is an unresolved address, step 105 is performed for that address.
The subsequent process is repeated, and if there is no remaining unit, the unit registration process ends.

This completes the unit registration process, but due to noise and other causes, the system controller 11 and unit 1
If data cannot be exchanged between 2, 13, 14, ... Or if the unit is connected to the bus 10 after the system controller 11 executes the registration process, the unit is not registered. In such a case, a registration request command is output from the unit to the system controller 11 so as to perform the registration process. FIG. 3 is a flow chart of a unit registration process when the system controller receives a registration request command from the unit.

When the system controller 11 receives a registration request command together with its address from a predetermined unit, it outputs the registration command to the unit. That is, the registration command is output to the bus 10 together with the address of the unit (step 201). As a result, the unit having the address output to the bus 10 (the unit that has generated the registration request command) reads the registration command, and transmits the registration data indicating what kind of unit it is within the predetermined time via the bus. Send to system controller 11.

The system controller 11 checks whether the registration data is received from the unit (step 202), and if not, checks whether a predetermined time has passed (step 20).
3), if it has not passed, it will receive the registration data.

If the registration data is received within the predetermined time, the registration data is stored in the memory 11a in association with the address (step 204) and the registration process is terminated, while the registration data is received even after the predetermined time has elapsed. If not, an error occurs and the host is notified.

Processing of each unit (Fig. 4) When each unit is powered on or when the reset button is pressed, it is checked whether an address search command addressed to itself has been received (step 301). Status signal indicating that is connected "
To the system controller 11 (step 30
2).

.. After that, it is monitored whether the registration command addressed to itself is received within a predetermined time, for example, 500 msec (steps 303 and 30).
Four). Note that 500 msec is the time required for the entire address search and unit registration processing by the system controller.

When it receives the registration command addressed to itself, it transmits registration data indicating what kind of unit it is, etc. to the system controller 11 via the bus (step 30
5) The unit registration process ends.

On the other hand, in step 303, if the registration command addressed to itself is not received even after 500 msec has elapsed, data could not be exchanged with the system controller 11 due to noise or other reasons, or after the registration processing by the system controller 11 was executed. Assuming the unit is connected to bus 10,
A registration request command is output from the unit to the system controller 11 to perform registration processing (step 30).
6).

Then, it is monitored whether the registration command addressed to itself is received within a predetermined time (steps 307 and 308), and if the registration command addressed to itself is received within the predetermined time, the registration data is transmitted to the system via the bus in step 305. It transmits to the controller 11 to end the unit registration processing. However, if the registration command is not received even after the lapse of a predetermined time, an error occurs and the post is notified.

<Effects of the Invention> As described above, according to the present invention, the controller sequentially sends the registration commands to the units constituting the system, and when each unit receives the registration command addressed to itself within a predetermined time, the registration data (type) is sent. If it sends to the controller what kind of unit it is and does not receive a registration command within a predetermined time, it sends a registration request command to the controller, and the controller generates the registration request command. Since the registration command is transmitted to the unit, the registration data is received from the unit, and the unit is registered, the units constituting the system can be automatically and reliably registered in the system controller.

[Brief description of drawings]

FIG. 1 is a block diagram of a system to which the present invention can be applied, FIGS. 2 and 3 are flow charts of unit registration processing of a system controller, and FIG. 4 is a flow chart of unit registration processing in each unit. 10 …… Bus 11 …… System controller 12-14 …… Unit

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Shinichi Mizuno 1-8 Nishigotanda, Shinagawa-ku, Tokyo Alpine Electronics, Inc. (72) Masao Saito 1-8-8 Gotanda, Shinagawa-ku, Tokyo Alpine Incorporated (72) Inventor Kenji Imai 1-8 Nishigotanda, Shinagawa-ku, Tokyo Alpine Electronics, Inc.

Claims (1)

(57) [Claims] 1. A method of registering a unit in a system in which a controller and a plurality of units are connected to one bus and data is mutually exchanged between the controller and each unit via a bus, wherein each unit has a unit registration condition. When the registration command addressed to itself is received from the controller after the condition is satisfied, the registration data is transmitted to the controller to register the unit, and the registration command is issued even if a predetermined time has elapsed after the condition for unit registration was satisfied. When not receiving, a registration request command is sent to the controller, the controller sends a registration command to the unit that has generated the registration request command, receives registration data from the unit, and registers the unit. How to register the unit.