JPH07231475A - Rising synchronization method between processors and its synchronization device - Google Patents

Abstract

(57) [Abstract] [PROBLEMS] To provide a method for synchronizing the rising edges of processors in an electronic device having a plurality of processors, and an apparatus therefor. An object of the present invention is to provide a rising edge synchronization method and an apparatus thereof. [Structure] In the above electronic device, each processor P
_{While m} notifies the other processors P _n that the initialization has been completed by the setting completion notifying means 11, the determining means 12 determines whether the other processors P _n have completed the initial settings. After the confirmation, the subsequent processing operation is started.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rising edge synchronization method between processors in an electronic device having a plurality of processors and its apparatus.

[0002]

2. Description of the Related Art Some electronic devices, such as cordless telephones, have a plurality of processors.

FIG. 3 is a block diagram showing the relationship between the cordless telephone and the exchange, and FIG. 4 is a flow chart showing the starting procedure of each processor of the cordless telephone.
As shown in FIG. 3, a cordless telephone 50 is connected to a telephone line, and a base unit 51 installed at a fixed position and a handset 52 capable of wirelessly transmitting and receiving data at a position distant from the base unit 51.
And consists of. The master unit 51 performs wireless data transmission / reception between the first processor P _m that performs a process related to data exchange with the exchange α, and the slave unit 52 based on the process of the first processor P _m. A second processor P _n for processing is mounted.

When power is supplied to the cordless telephone 50 through the exchange α, the first and second processors P _m and P _n are, for example, as shown in FIG. The rising process for performing the initial setting such as activating the display function of is independently executed (S10), and after the rising process is completed,
The subsequent processing procedure is performed.

The power is turned on not only when the cordless telephone is installed, but also when an error occurs in any of the processors P _m and P _n during call processing or call processing. This also includes the case where the power is temporarily turned off and then turned on again for the purpose of resetting the processors P _m and P _n .

[0006]

However, according to the above configuration, since the contents of the initial setting differ between the first processor P _m and the second processor P _n , the start-up process is completed in one of the processors. However, there is a case where the other processor still has a state that has not been completed, and in such a state, for example, the following inconvenience occurs.

That is, after the power is turned on, only the initialization of the first processor P _m is completed, and the initialization of the second processor P _n is not yet completed. when that had over, the processor P _m of the first will be notified to send a call request signal (significant data) to the slave unit 52 to the second processor P _n, the second processor P _n The call request signal cannot be received because the rising process is not completed. Therefore, since the first processor P _m does not respond to the exchange α, it returns an error signal indicating that the connection cannot be established, and the incoming call cannot be made.
Therefore, the exchange α once turns off the power and resets the two processors P _m and P _n , but the communication device 60 that issued the call request cannot receive the call unless the call request is issued again by dialing again. become.

Conversely, when making a call from the cordless telephone 50
Also in the processor P_m, P _nOne of the
If the processing is not completed, there is no response from the other party.
And it is necessary to perform the operation of the child device 52 again.
You have to repeat the order.

The present invention has been proposed in view of the above-mentioned conventional circumstances, and a method for synchronizing the rising edges of processors for eliminating the rising time lag between the processors that occurs in an electronic device including a plurality of processors, and The purpose is to provide the device.

[0010]

In order to achieve the above object, the present invention employs the following means. That is, as shown in FIG. 1, in an electronic device including a plurality of processors, each processor P _m notifies another processor P _n that its initial setting is completed, while the other processor P _m This is a method for synchronizing the rising edges of the processors so that the subsequent processing operation is started after confirming whether or not the initial setting in _n is completed.

The rising synchronization processing can be executed by three or more processors P _i (i is a subscript corresponding to the processor). Further, each processor P _m has a setting completion notifying means 11 _m for notifying other processors P _n that its own initial settings have been completed,
Based on the setting completion notification means information than 11 _n of the other processors P _n, so that provided with the other determination means for determining the completion of the initial setting of the processor P _n 12 _m.

[0012]

According to the above configuration, each processor P _m completes its own startup processing and then the other processors P _n.
Will wait until the startup process of
As a result, in the electronic device including the plurality of processors P _m and P _n , the operations of all the processors can be synchronized based on the operations of the processors that require the longest time to complete the startup process.

The present invention consists of only two processors P _m , P _n.
Not only is it applied to the rising edge synchronization between the processors, but as described above, the rising edge processing can be similarly synchronized among the three or more processors P _i .

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is applied to a cordless telephone having the structure shown in FIG. 3 will be described below.

FIG. 1 is a flow chart of the method of the present invention.
2 is a conceptual diagram of an embodiment according to the present invention. Each processor
Support P_m, P_nWhen installing a cordless phone, or
Error occurs when power is turned on from switch α.
The lifting process is executed, as shown in FIG.
In the initial stage, such as when reading / writing memory or blinking LEDs
Set [Fig. 1: S1] and confirm that the initial setting is complete.
Mutually another processor P_n, P _mTo notify [S
2].

Further, the processors P _m and P _n mutually determine whether or not the initialization of the other processors P _n and P _m has been completed, and if they have not been completed yet, they continue to wait [S3N → S3], when the initial setting is completed, it is assumed that all the rising processes are completed, and the subsequent processes are executed [S3Y].

As shown in FIG. 2, each of the processors P _m and P _n has a port a and a port for exchanging data with each other.
b is used as the setting completion notifying means 11 and the determining means 12 for executing the procedure of S2 and S3 in FIG.

That is, the port a, for one processor P _m , is a setting completion notifying means 11 for notifying the other processor P _n that the initialization of itself has been completed.
_It is used as _m , and when the initial setting of the processor P _m is completed, it is switched from the “L” state to the “H” state. On the other hand, the other processor P _n uses this port a as the determination means 12 _n for determining whether the initialization of the processor P _m is completed, and determines whether the port a is in the “H” state. The above determination (see FIG. 1: S3) is performed based on

The other port b is connected to the processor P._mFormat
Determining means 12_mUsed as a processor P_n
Setting completion notifying means 11_nUsed as. That's all
According to this embodiment, one processor P_mIs on
Setting completion notifying means 11_mOther port through (port a)
Rossa P_nTo notify the completion of its initial setting
On the other hand, another processor P_nThe initial settings of
Determining means 12_mMake the judgment at (port b)
Other processor P _nCompletes the startup process
Wait until it finishes without executing the subsequent processing.
Becomes On the contrary, the other processor P_nAlso in
Like, processor P_mUntil the startup process of
Will wait without performing the steps below.
It

Due to these operations, both processors P
_{Since the} completion timings of the rising edges of _m and P _n are completely synchronized, an error signal resulting from the rising time lag between the processors is not output to the exchange, which enables smooth communication.

Further, the present invention can be applied to an electronic device having three or more processors.
In this case, each processor notifies the other processors of the completion of its own initialization, and a plurality of (total number of processors-1) setting completion notifying means, and the initialization of all the other processors is completed. It is sufficient to provide a determination means (the same number as the setting completion notifying means) for determining whether or not the setting completion notifying means and the determining means adopt the ports as in the embodiments described in FIGS. 1 and 2 above. By doing so, the substantial rising edge synchronization processing can be performed in the same manner as in the above embodiment.

The ports a and b in the above embodiment are
It is sufficient to utilize a part of the existing control bus for the present invention rather than a dedicated port for implementing the present invention.

[0023]

As described above, according to the present invention, in an electronic device equipped with a plurality of processors, each processor is
After completing its own startup processing, after waiting until the startup processing of the other processor is completed, the subsequent processing will be executed. The inconvenience caused by sending significant data is effectively eliminated.

[Brief description of drawings]

1 is a flow diagram of the method of the present invention.

FIG. 2 is a conceptual diagram of an embodiment according to the present invention.

FIG. 3 is a block diagram of an apparatus to which the present invention is applied.

FIG. 4 is a flowchart showing a startup procedure of a conventional processor.

[Explanation of symbols]

P _m , P _n , Pi processor 11 Setting completion notifying means 12 Judging means

Claims (3)

[Claims] 1. In an electronic device having a plurality of processors, each processor (P _m ) notifies another processor (P _n ) that its initialization has been completed, while the other processor (P _m ) A rising edge synchronization method between processors that starts the subsequent processing operations after confirming whether or not the initial settings in P _n ) have been completed. 2. The rising synchronization method between processors according to claim 1, wherein the rising synchronization processing is executed among three or more processors (Pi: i is a subscript corresponding to the processor). 3. In an electronic device having a plurality of processors, a setting completion notifying means (11) for notifying each processor (P _m ) to another processor (P _n ) that its initial setting has been completed. ) And the information from the setting completion notifying means (11) of the other processor (P _n ), the other processor (P _n ).
A rising synchronization device between processors provided with a judging means (12) for judging the completion of the initialization of ( _n ).